非线性动力学、分岔 Matlab 程序实现，弹簧质量系统在简谐激励作用下的受迫振动，弹簧的恢复力F与变形x的关系为F=kx3，动力学方程为...30cosmxcxkxFwt++= 其中，给定参数，1m=，0.3c=，1.0k=，1w=，初始条件为(0)3.0x=，.(0)4.0x=设系统的动态参数为F0，绘出系统状态变量随参数变化分岔图，绘图参数对应的系统各周期及混沌状态的时间历程图、相轨迹图、Poincare映射图-Nonlinear dynamics, bifurcation Matlab

两个轨道计算的子程序，四元素乘积计算法和空间轨道动力学方程递推的扩展卡尔曼滤波算法。-Calculation subroutine two tracks, the four elements of the product of calculation and orbital dynamics space equation recursive extended Kalman filter algorithm.

不考虑扰动条件下的卫星二体运动源代码，可以详细的分析其动力学方程-Satellite two-body motion without considering the source code under disturbance conditions, can detailed analysis of the kinetic equation

两级行星齿轮传动的微分方程，以扭振模态计算(The differential equation of two-stage planetary gear transmission is calculated by torsional vibration mode)