Normal form theory is one of the basic tools for the analysis of nonlinear systems, and has been studied for more than a......

基于推广的对称群方法和符号计算，一些变系数非线性薛定谔方程的有限对称群解得到了研究。 在推广对称群的基础上，对超定方程组分3种......

The extended tanh method is further improved by generalizing the Riccati equation and introducing its twenty seven new s......

对一种新型四自由度并联机器人运动学正问题进行了研究，利用3个变量构造出求解正问题的3个约束方程，然后运用符号计算和析配消元法推......