无控纵向导弹弹道计算。用四阶龙库、阿当姆斯积分法，运行时间短，效果好。-no control ballistic missile vertical calculation. With the four-Long, Adam Shams integral method, a short running time, the effect is good.

非常直观易懂的tcp通信程序，特别适合与初学者与进阶者，让你了解四种端口类型，非常好入门案例！-Very intuitive and understandable tcp communication procedures, particularly those suited to beginners and advanced, so that you understand the four kinds of port types, a very good entry-case!

四阶龙格库塔法求解微分方程，收敛性好，可以求误差。-four step longgekuta method

利用龙哥库塔算法解微分方程（二阶，三阶，四阶）(Solving Differential Equations (Second, Third, and Fourth Orders) Using the Long Coulter Algorithm)