transient equation meaning in Chinese

非稳定方程

The paper proceeds from the transient equation for voltage and torque , analyze the electromechanic time constant of permanent - magnet dc servomotors based on the theory , and compare with the several testing methods which are used normal in the engineering , point out the difference and applying area also for the testing error which is led to possibly
摘要为了准确评价伺服电动机的动态性能指标，从电机的电压、转矩平衡方程式出发，在理论上对永磁直流伺服电动机的时间常数进行了分析探讨，并对工程实际中常用的几种测试方法进行分析和比较，指出其差别和适用范围以及可能造成的测试误差。
In theoretical study , the general governing equations for gas - liquid two - phase flow have been developed by applying the volume averaging method to the " local transient equations " of two - phase flow . in addition , by applying the time averaging operator to the above equations , the turbulent two - phase flow governing equations are obtained
理论上，从两相流“局部瞬时特性”出发，采用体积平均法推导出普适的描述气?液两相流运动的体积平均方程，在此基础上对其进行湍流时平均化，得出湍流两相流基本方程。