action

The relations of the resistivity of the metal conductor versus specific action, pressure, energy density, expansion speed of explosive products, density of conductor current and dielectric etc.

叙述了金属导体电爆炸的物理过程 ,分析了金属导体电爆炸时电阻率与比作用量、压力、能量、密度、爆炸产物膨胀速度、导体电流密度及周围介质等影响因素的关系 ,从而确定电爆炸断路开关的一般设计原则。

To give the integral invariants of Birkhoff system, including the Poincaré Cartan integral invariant and the Poincaré linear integral invariant, the formula of the asynchronous variation of Pfaffian action and the Birkhoff equations were used.

利用 Pfaff作用量的非等时变分公式和 Birkhoff方程来求这些积分不变量 。

Firstly, the parametric equations for the Birkhoffian systems are established; secondly, the Noether s theorem and its inverse theorem for the systems are given, which are based upon the invariant properties of the Pfaffian action with respect to the action of the infinitesimal transformation; and finally, an examples is given to illustrate the application of the results.

首先,建立了事件空间中Birkhoff系统的参数方程;其次,基于Pfaff作用量在无限小变换下的不变性,给出了事件空间中Birkhoff系统的Noether定理及其逆定理;最后,举例说明结果的应用。

In the model, theirrotationality of wave number vector and the wave action conservation equationare employed to deal with the wave refraction and diffraction under the effect ofcurrents.

在波浪场中运用波数矢量无旋和波作用量守恒方程求解波浪在波生流作用下的折射、绕射变形，以辐射应力作为波生流场的驱动力，考虑地转柯氏力和海底底摩擦的作用。