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Стохастический осциллятор - История изменений
2024-03-29T15:50:16Z
История изменений этой страницы в вики
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WikiSysop в 21:21, 6 марта 2010
2010-03-06T21:21:49Z
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Предыдущая</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Версия 21:21, 6 марта 2010</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l33" >Строка 33:</td>
<td colspan="2" class="diff-lineno">Строка 33:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center><math>\mathbf{x} = \begin{pmatrix} x \\ p \\ \end{pmatrix}, \;\;\;\; \mathbf{a} = \begin{pmatrix} p \\ -x -2\lambda p \\ \end{pmatrix}, \;\;\;\; \mathbf{b} = \begin{pmatrix} 0 & 0 & 0 \\ \sigma_1 x & \sigma_2 p & \sigma_3\\ \end{pmatrix}, \;\;\;\; \delta \mathbf{W} = \begin{pmatrix} \delta W_1 \\ \delta W_2 \\ \delta W_3 \\ \end{pmatrix}.</math></center></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center><math>\mathbf{x} = \begin{pmatrix} x \\ p \\ \end{pmatrix}, \;\;\;\; \mathbf{a} = \begin{pmatrix} p \\ -x -2\lambda p \\ \end{pmatrix}, \;\;\;\; \mathbf{b} = \begin{pmatrix} 0 & 0 & 0 \\ \sigma_1 x & \sigma_2 p & \sigma_3\\ \end{pmatrix}, \;\;\;\; \delta \mathbf{W} = \begin{pmatrix} \delta W_1 \\ \delta W_2 \\ \delta W_3 \\ \end{pmatrix}.</math></center></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Для функции <math>\textstyle F(\mathbf{x})=F(x,p)</math> координат и импульсов воспользуемся динамическим уравнением для средних (<del class="diffchange diffchange-inline">стр. \pageref{aver_F_n_dim}</del>):</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Для функции <math>\textstyle F(\mathbf{x})=F(x,p)</math> координат и импульсов воспользуемся динамическим уравнением для средних (<ins class="diffchange diffchange-inline">[[Системы стохастических уравнений]]</ins>):</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center><math>\frac{d}{dt}{\left\langle F(\mathbf{x})\right\rangle } = \left\langle \frac{\partial F}{\partial \mathbf{x}}\cdot \,\mathbf{a} +\frac{1}{2} \mathrm{Tr}\,\left[ \mathbf{b}^T \cdot \frac{\partial^2 F}{\partial \mathbf{x}^2} \cdot \mathbf{b} \right] \right\rangle , \;\;\;\;\;\;\;\;\; \frac{\partial^2 F}{\partial \mathbf{x}^2}= \begin{pmatrix} F_{xx} & F_{xp} \\ F_{px} & F_{pp} \end{pmatrix},</math></center></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center><math>\frac{d}{dt}{\left\langle F(\mathbf{x})\right\rangle } = \left\langle \frac{\partial F}{\partial \mathbf{x}}\cdot \,\mathbf{a} +\frac{1}{2} \mathrm{Tr}\,\left[ \mathbf{b}^T \cdot \frac{\partial^2 F}{\partial \mathbf{x}^2} \cdot \mathbf{b} \right] \right\rangle , \;\;\;\;\;\;\;\;\; \frac{\partial^2 F}{\partial \mathbf{x}^2}= \begin{pmatrix} F_{xx} & F_{xp} \\ F_{px} & F_{pp} \end{pmatrix},</math></center></div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l52" >Строка 52:</td>
<td colspan="2" class="diff-lineno">Строка 52:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>  |}</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>  |}</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>где <math>\textstyle \omega=\sqrt{1-\lambda^2}</math> (мы считаем, что трение мало и <math>\textstyle \lambda<1</math>). При выводе (7.3) можно воспользоваться алгоритмом <del class="diffchange diffchange-inline">на стр. \pageref{sec_line_n_dim_models} </del>или привести систему к одному дифференциальному уравнению второго порядка (<math>\textstyle \lessdot</math> H).</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>где <math>\textstyle \omega=\sqrt{1-\lambda^2}</math> (мы считаем, что трение мало и <math>\textstyle \lambda<1</math>). При выводе (7.3) можно воспользоваться алгоритмом <ins class="diffchange diffchange-inline"> ([[Линейные многомерные модели]]) </ins>или привести систему к одному дифференциальному уравнению второго порядка (<math>\textstyle \lessdot</math> H).</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Выбор <math>\textstyle F=x^2,\;p^2,\;xp</math> приводит к системе уравнений для моментов:</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Выбор <math>\textstyle F=x^2,\;p^2,\;xp</math> приводит к системе уравнений для моментов:</div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l76" >Строка 76:</td>
<td colspan="2" class="diff-lineno">Строка 76:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Каждая разновидность шума увеличивает дисперсии, но по-разному. Трение <math>\textstyle \lambda</math> играет стабилизирующую роль, уменьшая <math>\textstyle \mathbf{D}</math>.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Каждая разновидность шума увеличивает дисперсии, но по-разному. Трение <math>\textstyle \lambda</math> играет стабилизирующую роль, уменьшая <math>\textstyle \mathbf{D}</math>.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Заметим, что динамика при <math>\textstyle t\to\infty</math> продолжается только, если существует внешний шум (<math>\textstyle \sigma_3\neq 0</math>). Если <math>\textstyle \sigma_3=0</math>, стационарный режим также существует, но он вырождается в полное затухание колебаний, и <math>\textstyle \left\langle x^2\right\rangle =\left\langle p^2\right\rangle =0</math>. Причина подобного поведения та же, что и у логистического уравнения <del class="diffchange diffchange-inline">(стр. \pageref{why_logistic_stop})</del>.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Заметим, что динамика при <math>\textstyle t\to\infty</math> продолжается только, если существует внешний шум (<math>\textstyle \sigma_3\neq 0</math>). Если <math>\textstyle \sigma_3=0</math>, стационарный режим также существует, но он вырождается в полное затухание колебаний, и <math>\textstyle \left\langle x^2\right\rangle =\left\langle p^2\right\rangle =0</math>. Причина подобного поведения та же, что и у <ins class="diffchange diffchange-inline">[[Логистическое уравнение|</ins>логистического уравнения<ins class="diffchange diffchange-inline">]]</ins>.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><math>\textstyle \bullet</math> Пусть детерминированной составляющей трения нет <math>\textstyle \lambda=0</math>, а флуктуации упругости и трения имеют одинаковые амплитуды <math>\textstyle \sigma_1=\sigma_2=\sigma</math>. Введём энергию гармонического осциллятора:</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><math>\textstyle \bullet</math> Пусть детерминированной составляющей трения нет <math>\textstyle \lambda=0</math>, а флуктуации упругости и трения имеют одинаковые амплитуды <math>\textstyle \sigma_1=\sigma_2=\sigma</math>. Введём энергию гармонического осциллятора:</div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l96" >Строка 96:</td>
<td colspan="2" class="diff-lineno">Строка 96:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center><math>\left\{ \begin{array}{l} dx = p\, dt\\ dp = -x\, dt - 2\lambda\, p \, dt + \sigma \, \delta W. \end{array} \right.</math></center></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center><math>\left\{ \begin{array}{l} dx = p\, dt\\ dp = -x\, dt - 2\lambda\, p \, dt + \sigma \, \delta W. \end{array} \right.</math></center></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Подобную систему мы рассматривали в шестой главе (<del class="diffchange diffchange-inline">стр. \pageref{stochastic_oscillator}</del>). Она обладает точным решением, которое выражается через две независимые гауссовы переменные. Воспользуемся общим алгоритмом решения системы линейных уравнений (см. <del class="diffchange diffchange-inline">стр. \pageref{sec_line_n_dim_models}</del>) с матрицами:</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Подобную систему мы рассматривали в шестой главе (<ins class="diffchange diffchange-inline">[[Уравнение стохастического осциллятора]]</ins>). Она обладает точным решением, которое выражается через две независимые гауссовы переменные. Воспользуемся общим алгоритмом решения системы линейных уравнений (см. <ins class="diffchange diffchange-inline">[[Линейные многомерные модели]]</ins>) с матрицами:</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center><math>\mathbf{A} = \begin{pmatrix} 0 & 1 \\ -1 & -2\lambda \\ \end{pmatrix}, \;\;\;\;\;\; \mathbf{B} = \begin{pmatrix} 0 & 0 \\ 0 & \sigma \\ \end{pmatrix}.</math></center></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center><math>\mathbf{A} = \begin{pmatrix} 0 & 1 \\ -1 & -2\lambda \\ \end{pmatrix}, \;\;\;\;\;\; \mathbf{B} = \begin{pmatrix} 0 & 0 \\ 0 & \sigma \\ \end{pmatrix}.</math></center></div></td></tr>
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WikiSysop
http://synset.com/wiki/index.php?title=%D0%A1%D1%82%D0%BE%D1%85%D0%B0%D1%81%D1%82%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8%D0%B9_%D0%BE%D1%81%D1%86%D0%B8%D0%BB%D0%BB%D1%8F%D1%82%D0%BE%D1%80&diff=1794&oldid=prev
WikiSysop в 21:15, 6 марта 2010
2010-03-06T21:15:47Z
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Версия 21:15, 6 марта 2010</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l49" >Строка 49:</td>
<td colspan="2" class="diff-lineno">Строка 49:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>{| width="100%"  </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>{| width="100%"  </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>  | width="90%" align="center"|<math> \left\{ \begin{array}{l} \left\langle x\right\rangle = \left( x_0\,\cos \omega t + \frac{p_0+\lambda x_0}{\omega}\,\sin \omega t\right)\, e^{-\lambda t}\\ \left\langle p\right\rangle = \left( p_0\,\cos \omega t - \frac{x_0+\lambda p_0}{\omega}\,\sin \omega t\right)\, e^{-\lambda t}, \end{array} \right. </math></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>  | width="90%" align="center"|<math> \left\{ \begin{array}{l} \left\langle x\right\rangle = \left( x_0\,\cos \omega t + \frac{p_0+\lambda x_0}{\omega}\,\sin \omega t\right)\, e^{-\lambda t}\\ \left\langle p\right\rangle = \left( p_0\,\cos \omega t - \frac{x_0+\lambda p_0}{\omega}\,\sin \omega t\right)\, e^{-\lambda t}, \end{array} \right. </math></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>  | <div width="10%" align="right" style="color:#0000CC">'''(<del class="diffchange diffchange-inline">EQN</del>)'''</div></div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>  | <div width="10%" align="right" style="color:#0000CC">'''(<ins class="diffchange diffchange-inline">7.3</ins>)'''</div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>  |}</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>  |}</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>где <math>\textstyle \omega=\sqrt{1-\lambda^2}</math> (мы считаем, что трение мало и <math>\textstyle \lambda<1</math>). При выводе () можно воспользоваться алгоритмом на стр. \pageref{sec_line_n_dim_models} или привести систему к одному дифференциальному уравнению второго порядка (<math>\textstyle \lessdot</math> H).</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>где <math>\textstyle \omega=\sqrt{1-\lambda^2}</math> (мы считаем, что трение мало и <math>\textstyle \lambda<1</math>). При выводе (<ins class="diffchange diffchange-inline">7.3</ins>) можно воспользоваться алгоритмом на стр. \pageref{sec_line_n_dim_models} или привести систему к одному дифференциальному уравнению второго порядка (<math>\textstyle \lessdot</math> H).</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Выбор <math>\textstyle F=x^2,\;p^2,\;xp</math> приводит к системе уравнений для моментов:</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Выбор <math>\textstyle F=x^2,\;p^2,\;xp</math> приводит к системе уравнений для моментов:</div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l58" >Строка 58:</td>
<td colspan="2" class="diff-lineno">Строка 58:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>{| width="100%"  </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>{| width="100%"  </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>  | width="90%" align="center"|<math> \left\{ \begin{array}{l} \dot{\left\langle x^2\right\rangle } = 2\left\langle xp\right\rangle \\ \dot{\left\langle xp\right\rangle } = \left\langle p^2\right\rangle - \left\langle x^2\right\rangle - 2\lambda \,\left\langle xp\right\rangle \\ \dot{\left\langle p^2\right\rangle } = -2\left\langle xp\right\rangle + \sigma^2_1\left\langle x^2\right\rangle + (\sigma^2_2 - 4\lambda) \,\left\langle p^2\right\rangle + \sigma^2_3.\\ \end{array} \right. </math></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>  | width="90%" align="center"|<math> \left\{ \begin{array}{l} \dot{\left\langle x^2\right\rangle } = 2\left\langle xp\right\rangle \\ \dot{\left\langle xp\right\rangle } = \left\langle p^2\right\rangle - \left\langle x^2\right\rangle - 2\lambda \,\left\langle xp\right\rangle \\ \dot{\left\langle p^2\right\rangle } = -2\left\langle xp\right\rangle + \sigma^2_1\left\langle x^2\right\rangle + (\sigma^2_2 - 4\lambda) \,\left\langle p^2\right\rangle + \sigma^2_3.\\ \end{array} \right. </math></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>  | <div width="10%" align="right" style="color:#0000CC">'''(<del class="diffchange diffchange-inline">EQN</del>)'''</div></div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>  | <div width="10%" align="right" style="color:#0000CC">'''(<ins class="diffchange diffchange-inline">7.4</ins>)'''</div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>  |}</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>  |}</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l67" >Строка 67:</td>
<td colspan="2" class="diff-lineno">Строка 67:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>{| width="100%"  </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>{| width="100%"  </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>  | width="90%" align="center"|<math> \left\langle x^2\right\rangle =\left\langle p^2\right\rangle = \frac{\sigma^2_3}{4\lambda -\sigma^2_1-\sigma^2_2},\;\;\;\;\;\;\;\;\;\;\left\langle xp\right\rangle =0. </math></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>  | width="90%" align="center"|<math> \left\langle x^2\right\rangle =\left\langle p^2\right\rangle = \frac{\sigma^2_3}{4\lambda -\sigma^2_1-\sigma^2_2},\;\;\;\;\;\;\;\;\;\;\left\langle xp\right\rangle =0. </math></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>  | <div width="10%" align="right" style="color:#0000CC">'''(<del class="diffchange diffchange-inline">EQN</del>)'''</div></div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>  | <div width="10%" align="right" style="color:#0000CC">'''(<ins class="diffchange diffchange-inline">7.5</ins>)'''</div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>  |}</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>  |}</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l82" >Строка 82:</td>
<td colspan="2" class="diff-lineno">Строка 82:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center><math>E=\frac{x^2+p^2}{2}.</math></center></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center><math>E=\frac{x^2+p^2}{2}.</math></center></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Из () следует, что её среднее значение удовлетворяет уравнению:</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Из (<ins class="diffchange diffchange-inline">7.4</ins>) следует, что её среднее значение удовлетворяет уравнению:</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center><math>\frac{d}{dt}\left\langle E\right\rangle = \sigma^2 \left\langle E\right\rangle + \frac{\sigma^2_3}{2},</math></center></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center><math>\frac{d}{dt}\left\langle E\right\rangle = \sigma^2 \left\langle E\right\rangle + \frac{\sigma^2_3}{2},</math></center></div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l100" >Строка 100:</td>
<td colspan="2" class="diff-lineno">Строка 100:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center><math>\mathbf{A} = \begin{pmatrix} 0 & 1 \\ -1 & -2\lambda \\ \end{pmatrix}, \;\;\;\;\;\; \mathbf{B} = \begin{pmatrix} 0 & 0 \\ 0 & \sigma \\ \end{pmatrix}.</math></center></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center><math>\mathbf{A} = \begin{pmatrix} 0 & 1 \\ -1 & -2\lambda \\ \end{pmatrix}, \;\;\;\;\;\; \mathbf{B} = \begin{pmatrix} 0 & 0 \\ 0 & \sigma \\ \end{pmatrix}.</math></center></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Чтобы найти <math>\textstyle e^{\mathbf{A}t}</math>, продифференцируем () по <math>\textstyle x_0</math> и <math>\textstyle p_0</math>:</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Чтобы найти <math>\textstyle e^{\mathbf{A}t}</math>, продифференцируем (<ins class="diffchange diffchange-inline">7.3</ins>) по <math>\textstyle x_0</math> и <math>\textstyle p_0</math>:</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center><math>e^{\mathbf{A}t} = \begin{pmatrix} \omega \cos \omega t + \lambda\sin \omega t & \sin \omega t \\ -\sin \omega t & \omega \cos \omega t - \lambda\sin \omega t \\ \end{pmatrix} \cdot \frac{e^{-\lambda t}}{\omega}.</math></center></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center><math>e^{\mathbf{A}t} = \begin{pmatrix} \omega \cos \omega t + \lambda\sin \omega t & \sin \omega t \\ -\sin \omega t & \omega \cos \omega t - \lambda\sin \omega t \\ \end{pmatrix} \cdot \frac{e^{-\lambda t}}{\omega}.</math></center></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>При помощи этой матрицы, интегрируя (), <del class="diffchange diffchange-inline">стр. \pageref{n_sys_line_disp}</del>, можно найти дисперсию координаты и импульса:</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>При помощи этой матрицы, интегрируя (<ins class="diffchange diffchange-inline">6.28</ins>), <ins class="diffchange diffchange-inline">([[Линейные многомерные модели]])</ins>, можно найти дисперсию координаты и импульса:</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center><math>\left\{ \begin{matrix} D_{xx}(t) \\ D_{pp}(t) \\ \end{matrix} \right\} = \frac{\sigma^2}{4\lambda} - \frac{\sigma^2}{4\lambda\omega^2} \, \bigl[1-\lambda^2 \cos(2\omega t) \pm \lambda \omega \sin(2\omega t)\bigr]\,e^{-2\lambda t}.</math></center></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center><math>\left\{ \begin{matrix} D_{xx}(t) \\ D_{pp}(t) \\ \end{matrix} \right\} = \frac{\sigma^2}{4\lambda} - \frac{\sigma^2}{4\lambda\omega^2} \, \bigl[1-\lambda^2 \cos(2\omega t) \pm \lambda \omega \sin(2\omega t)\bigr]\,e^{-2\lambda t}.</math></center></div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l112" >Строка 112:</td>
<td colspan="2" class="diff-lineno">Строка 112:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center><math>D_{xp}(t) = \frac{\sigma^2 }{2\omega^2}\, \sin^2(\omega t)\,e^{-2\lambda t}</math></center></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center><math>D_{xp}(t) = \frac{\sigma^2 }{2\omega^2}\, \sin^2(\omega t)\,e^{-2\lambda t}</math></center></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>и стремится к нулю при <math>\textstyle t\to\infty</math> и <math>\textstyle \lambda>0</math>. В результате, в стационарном режиме (<math>\textstyle t\to\infty</math>) матрица дисперсий диагональна (), поэтому автоковариационная матрица <math>\textstyle \mathrm{cov}\,\tau)</math> равна <math>\textstyle e^{\mathbf{A}^T|\tau|}</math> с множителем <math>\textstyle \sigma^2/4\lambda</math>.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>и стремится к нулю при <math>\textstyle t\to\infty</math> и <math>\textstyle \lambda>0</math>. В результате, в стационарном режиме (<math>\textstyle t\to\infty</math>) матрица дисперсий диагональна (<ins class="diffchange diffchange-inline">7.5</ins>), поэтому автоковариационная матрица <math>\textstyle \mathrm{cov}\,\tau)</math> равна <math>\textstyle e^{\mathbf{A}^T|\tau|}</math> с множителем <math>\textstyle \sigma^2/4\lambda</math>.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>При отсутствии трения <math>\textstyle \lambda=0</math>, <math>\textstyle \omega=1</math>:</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>При отсутствии трения <math>\textstyle \lambda=0</math>, <math>\textstyle \omega=1</math>:</div></td></tr>
</table>
WikiSysop
http://synset.com/wiki/index.php?title=%D0%A1%D1%82%D0%BE%D1%85%D0%B0%D1%81%D1%82%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8%D0%B9_%D0%BE%D1%81%D1%86%D0%B8%D0%BB%D0%BB%D1%8F%D1%82%D0%BE%D1%80&diff=1173&oldid=prev
WikiSysop в 19:56, 20 февраля 2010
2010-02-20T19:56:20Z
<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<col class="diff-marker" />
<col class="diff-content" />
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Предыдущая</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Версия 19:56, 20 февраля 2010</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l39" >Строка 39:</td>
<td colspan="2" class="diff-lineno">Строка 39:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>где <math>\textstyle F_{xx}</math> &mdash; вторая производная по <math>\textstyle x</math>, <math>\textstyle F_{xp}</math> &mdash; производная по <math>\textstyle x</math> и <math>\textstyle p</math>, и т.д. Подставляя матрицы и перемножая их, получаем (<math>\textstyle \lessdot</math> H):</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>где <math>\textstyle F_{xx}</math> &mdash; вторая производная по <math>\textstyle x</math>, <math>\textstyle F_{xp}</math> &mdash; производная по <math>\textstyle x</math> и <math>\textstyle p</math>, и т.д. Подставляя матрицы и перемножая их, получаем (<math>\textstyle \lessdot</math> H):</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>:<center></div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>:<center><ins class="diffchange diffchange-inline">[[File:osc_eqn</ins>.<ins class="diffchange diffchange-inline">png]]</ins></center></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del class="diffchange diffchange-inline"><math></del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del class="diffchange diffchange-inline">\frac{d}{dt}\, {\Bigl<F(x,p)\Bigr>}</del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del class="diffchange diffchange-inline">=\Bigl< p F_x - (x+2\lambda p)F_p\Bigr> + \frac{1}{2}\Bigl< (\sigma^2_1 x^2 + \sigma^2_2 p^2  +  \sigma^2_3) F_{pp}\Bigr></del>.</div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del class="diffchange diffchange-inline"></math></del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div></center></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Выбор <math>\textstyle F=x</math> и <math>\textstyle F=p</math> приводит к системе уравнений, совпадающих с детерминированными (снос линеен!):</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Выбор <math>\textstyle F=x</math> и <math>\textstyle F=p</math> приводит к системе уравнений, совпадающих с детерминированными (снос линеен!):</div></td></tr>
</table>
WikiSysop
http://synset.com/wiki/index.php?title=%D0%A1%D1%82%D0%BE%D1%85%D0%B0%D1%81%D1%82%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8%D0%B9_%D0%BE%D1%81%D1%86%D0%B8%D0%BB%D0%BB%D1%8F%D1%82%D0%BE%D1%80&diff=1136&oldid=prev
WikiSysop в 19:12, 20 февраля 2010
2010-02-20T19:12:55Z
<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Предыдущая</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Версия 19:12, 20 февраля 2010</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l41" >Строка 41:</td>
<td colspan="2" class="diff-lineno">Строка 41:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><math></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><math></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>\frac{d}{dt}\,  </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>\frac{d}{dt}\, <ins class="diffchange diffchange-inline">{\Bigl<F(x,p)\Bigr>}</ins></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>=\<del class="diffchange diffchange-inline">left</del>< p F_x - (x+2\lambda p) F_p \<del class="diffchange diffchange-inline">right</del>>  </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>=\<ins class="diffchange diffchange-inline">Bigl</ins>< p F_x - (x+2\lambda p)F_p\<ins class="diffchange diffchange-inline">Bigr</ins>> + \frac{1}{2}\<ins class="diffchange diffchange-inline">Bigl</ins>< (\sigma^2_1 x^2 + \sigma^2_2 p^2 <ins class="diffchange diffchange-inline"> </ins>+ <ins class="diffchange diffchange-inline"> </ins>\sigma^2_3) F_{pp}\<ins class="diffchange diffchange-inline">Bigr</ins>>.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>+ \frac{1}{2}\<del class="diffchange diffchange-inline">left</del><(\sigma^2_1 x^2 + \sigma^2_2 p^2 + \sigma^2_3) F_{pp}\<del class="diffchange diffchange-inline">right</del>>.</div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></math></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></math></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></center></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></center></div></td></tr>
</table>
WikiSysop
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WikiSysop в 19:11, 20 февраля 2010
2010-02-20T19:11:43Z
<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Предыдущая</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Версия 19:11, 20 февраля 2010</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l42" >Строка 42:</td>
<td colspan="2" class="diff-lineno">Строка 42:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><math></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><math></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>\frac{d}{dt}\,  </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>\frac{d}{dt}\,  </div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>\left< <del class="diffchange diffchange-inline">F</del>(x<del class="diffchange diffchange-inline">,</del>p) \right>  </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">=</ins>\left< <ins class="diffchange diffchange-inline">p F_x - </ins>(x<ins class="diffchange diffchange-inline">+2\lambda </ins>p) <ins class="diffchange diffchange-inline">F_p </ins>\right>  </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>+ \frac{1}{2}\left<(\sigma^2_1 x^2 + \sigma^2_2 p^2 + \sigma^2_3) F_{pp}\right>.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>+ \frac{1}{2}\left<(\sigma^2_1 x^2 + \sigma^2_2 p^2 + \sigma^2_3) F_{pp}\right>.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></math></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></math></div></td></tr>
</table>
WikiSysop
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WikiSysop в 19:10, 20 февраля 2010
2010-02-20T19:10:56Z
<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="ru">
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Предыдущая</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Версия 19:10, 20 февраля 2010</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l42" >Строка 42:</td>
<td colspan="2" class="diff-lineno">Строка 42:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><math></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><math></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>\frac{d}{dt}\,  </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>\frac{d}{dt}\,  </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">\left< F(x,p) \right> </ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">+ \frac{1}{2}\left<(\sigma^2_1 x^2 + \sigma^2_2 p^2 + \sigma^2_3) F_{pp}\right>.</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></math></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></math></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></center></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></center></div></td></tr>
</table>
WikiSysop
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WikiSysop в 19:09, 20 февраля 2010
2010-02-20T19:09:58Z
<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="ru">
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Предыдущая</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Версия 19:09, 20 февраля 2010</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l41" >Строка 41:</td>
<td colspan="2" class="diff-lineno">Строка 41:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><math></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><math></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>\frac{d}{dt}\, <del class="diffchange diffchange-inline">\left<F(x,p)\right> =\left< p F_x - (x+2\lambda p) F_p \right> </del></div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>\frac{d}{dt}\,  </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></math></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></math></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></center></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></center></div></td></tr>
</table>
WikiSysop
http://synset.com/wiki/index.php?title=%D0%A1%D1%82%D0%BE%D1%85%D0%B0%D1%81%D1%82%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8%D0%B9_%D0%BE%D1%81%D1%86%D0%B8%D0%BB%D0%BB%D1%8F%D1%82%D0%BE%D1%80&diff=1132&oldid=prev
WikiSysop в 19:08, 20 февраля 2010
2010-02-20T19:08:23Z
<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="ru">
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Предыдущая</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Версия 19:08, 20 февраля 2010</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l41" >Строка 41:</td>
<td colspan="2" class="diff-lineno">Строка 41:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><math></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><math></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>\frac{d}{dt}\, \left<F(x,p)\right> =\left< p F_x - (x+2\lambda p)F_p \right>  </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>\frac{d}{dt}\, \left<F(x,p)\right> =\left< p F_x - (x+2\lambda p) F_p \right>  </div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del class="diffchange diffchange-inline">+ \frac{1}{2}\left<(\sigma^2_1 x^2 + \sigma^2_2 p^2 + \sigma^2_3) F_{pp}\right>.</del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></math></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></math></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></center></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></center></div></td></tr>
</table>
WikiSysop
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WikiSysop в 19:06, 20 февраля 2010
2010-02-20T19:06:45Z
<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="ru">
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Предыдущая</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Версия 19:06, 20 февраля 2010</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l41" >Строка 41:</td>
<td colspan="2" class="diff-lineno">Строка 41:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>:<center></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><math></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><math></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>\frac{d}{dt}\, \<del class="diffchange diffchange-inline">bigl</del><F(x,p)\<del class="diffchange diffchange-inline">bigr</del>> =\<del class="diffchange diffchange-inline">bigl</del>< p F_x - (x+2\lambda p)F_p\<del class="diffchange diffchange-inline">bigr</del>>  </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>\frac{d}{dt}\, \<ins class="diffchange diffchange-inline">left</ins><F(x,p)\<ins class="diffchange diffchange-inline">right</ins>> =\<ins class="diffchange diffchange-inline">left</ins>< p F_x - (x+2\lambda p)F_p \<ins class="diffchange diffchange-inline">right</ins>>  </div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>+ \frac{1}{2}\<del class="diffchange diffchange-inline">bigl</del><(\sigma^2_1 x^2 + \sigma^2_2 p^2 + \sigma^2_3) F_{pp}\<del class="diffchange diffchange-inline">bigr</del>>.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>+ \frac{1}{2}\<ins class="diffchange diffchange-inline">left</ins><(\sigma^2_1 x^2 + \sigma^2_2 p^2 + \sigma^2_3) F_{pp}\<ins class="diffchange diffchange-inline">right</ins>>.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></math></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></math></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></center></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></center></div></td></tr>
</table>
WikiSysop
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WikiSysop в 19:05, 20 февраля 2010
2010-02-20T19:05:15Z
<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="ru">
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Предыдущая</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Версия 19:05, 20 февраля 2010</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l9" >Строка 9:</td>
<td colspan="2" class="diff-lineno">Строка 9:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><math>\textstyle \bullet</math> Множество механических, электромагнитных, биологических и социальных систем описываются осцилляторными уравнениями. Для определённости мы рассмотрим одномерный механический осциллятор массой <math>\textstyle m</math>, подверженный трению и внешним стохастическим воздействиям. Определение импульса и закон Ньютона в этом случае имеют вид:  </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><math>\textstyle \bullet</math> Множество механических, электромагнитных, биологических и социальных систем описываются осцилляторными уравнениями. Для определённости мы рассмотрим одномерный механический осциллятор массой <math>\textstyle m</math>, подверженный трению и внешним стохастическим воздействиям. Определение импульса и закон Ньютона в этом случае имеют вид:  </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><center> [[File:oscillator.png</center></div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><center> [[File:oscillator.png<ins class="diffchange diffchange-inline">]]</ins></center></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>где сила состоит из трёх компонент:</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>где сила состоит из трёх компонент:</div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l39" >Строка 39:</td>
<td colspan="2" class="diff-lineno">Строка 39:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>где <math>\textstyle F_{xx}</math> &mdash; вторая производная по <math>\textstyle x</math>, <math>\textstyle F_{xp}</math> &mdash; производная по <math>\textstyle x</math> и <math>\textstyle p</math>, и т.д. Подставляя матрицы и перемножая их, получаем (<math>\textstyle \lessdot</math> H):</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>где <math>\textstyle F_{xx}</math> &mdash; вторая производная по <math>\textstyle x</math>, <math>\textstyle F_{xp}</math> &mdash; производная по <math>\textstyle x</math> и <math>\textstyle p</math>, и т.д. Подставляя матрицы и перемножая их, получаем (<math>\textstyle \lessdot</math> H):</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>:<center><math></div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>:<center></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>\frac{d}{dt}\, \<del class="diffchange diffchange-inline">Bigl</del><F(x,p)\<del class="diffchange diffchange-inline">Bigr</del>> =\<del class="diffchange diffchange-inline">Bigl</del>< p F_x - (x+2\lambda p)F_p\<del class="diffchange diffchange-inline">Bigr</del>>  </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><math></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>+ \frac{1}{2}\<del class="diffchange diffchange-inline">Bigl</del><(\sigma^2_1 x^2 + \sigma^2_2 p^2 + \sigma^2_3) F_{pp}\<del class="diffchange diffchange-inline">Bigr</del>>.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>\frac{d}{dt}\, \<ins class="diffchange diffchange-inline">bigl</ins><F(x,p)\<ins class="diffchange diffchange-inline">bigr</ins>> =\<ins class="diffchange diffchange-inline">bigl</ins>< p F_x - (x+2\lambda p)F_p\<ins class="diffchange diffchange-inline">bigr</ins>>  </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>+ \frac{1}{2}\<ins class="diffchange diffchange-inline">bigl</ins><(\sigma^2_1 x^2 + \sigma^2_2 p^2 + \sigma^2_3) F_{pp}\<ins class="diffchange diffchange-inline">bigr</ins>>.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></math></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></math></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></center></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></center></div></td></tr>
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