many wave approximation

A weak wave approximation of the Riemann solver was adopted to deal with the weak discontinuity,while the non-iterative Riemann solution was introduced in strong discontinuity.

在弱间断的条件下,采用弱波近似的黎曼解来描述粒子间的相互作用;在强间断的条件下,则引入非迭代黎曼解来描述粒子间的相互作用。

The experimental results of the prototype clarified that a quasi-traveling wave has exist .

论述了该自走型直线超声电机的结构设计和单相驱动原理,用有限元方法和激光扫描振动实验对该超声电机驱动端面能产生近似行波进行了验证,并说明利用自激励驱动的可行性,最后给出自激励驱动电路。

This paper reviews the development of falling films from the long-wave approximation equation to the integral boundary layer equation, from the linear instability analysis to the weakly nonlinear analysis, from the primary instability to the secondary instability and from the finite amplitude computation to the direct numerical simulation.

全面回顾了下落薄膜从长波近似方程到积分边界层方程,从线性稳定性分析到弱非线性分析,从首次失稳到二次失稳以及从有限振幅计算到直接数值模拟的发展历程,总结了下落薄膜已有的理论结果和数值结果。