采用matlab编写的常微分方程的数值解法，有算例，以及改进龙格库塔方法。-The numerical solution of ordinary differential equation by using Matlab prepared, with examples, and the improvement of the Runge Kutta method.

基于龙格库塔的单自由度流固耦合udf（fluent动网格）-Based on single degree of freedom of runge kutta fluid-structure coupling udf dynamic grid (fluent)

使用龙格库塔法求解微分方程，建立火箭模型，大气密度用函数计算，对比两种改进型的高度，速度及距离随时间的变化规律。-Using the Runge-Kutta method to solve differential equations, build model rockets, air density is calculated using the function, comparison of the two modified height, speed and distance variat