求解简单微分方程。模拟双摆运动并附简单说明材料。-For animation, the program uses Matlab s normal plot command combined with the drawnow command. It is based on the ode45 solution of the corresponding differential equations. Comprehensive documentation is provided, incl

用matlab中的ode45数值求解电路中的节点电压和元件电流（已运行可行）-Using matlab ode45 numerical solution of the node in the circuit voltage and component current (already running practicable))

解决ode45问题的非常强大的软件，另一个是matcont，不过后者需要在matlab环境下运行-Very powerful software to solve the problem of ode45, another is the matcont, but the latter needs to run in matlab environment

求解非线性高阶方程组的详细示例，是学习Matlab求解方程组的好材料。(solve nonlinear high-order differential equations)