The exact and explicit solutions of these equations are obtained by using the travelling wave method. These exact solutions are solitary wave solutions of a rational type.
用行波方法得到了这些方程的显式精确解，即有理分式型孤立波解。
Drive and control system for two-degree of freedom based on the ring-type travelling-wave ultrasonic motors is designed.
设计了基于超声波电机的二自由度机械臂的驱动控制系统电路。
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