Constructing new exact solutions to nonlinear difference-differential equations by Riccati equation 用Riccati方程构造非线性差分微分方程新的精确解
The new exact solutions of Volterra difference-differential equation and KdV difference-differential equation Volterra差分微分方程和KdV差分微分方程新的精确解
A necessary and sufficient condition for the equivalence of a neutral difference-differential equation and an ordinary differential equation in the theory of stability for the first critical case 第一临界情形中立型微分差分方程和常微分方程稳定性等价的一个充要条件
First, the difference-differential dynamic model is obtained from control equation by difference method. 首先引入差分,将控制方程转化为简单易求的差分微分型动力学模型。