平面极坐标系

考虑到填料空间与填料丝网的结构特点，在丝网与丝网之间的填料空间构建了直角坐标描述方程；对于绕填料丝的流动则构建了平面极坐标系下的描述方程。

Considering the structure characteristics of the packing space and packing wire mesh , using rectangular equation describe packing space and using polar coordinate equation describe the flowing process on the wire mesh .

在平面极坐标系中，推导了确定应力函数形式的基本公式.对于弹性力学平面极坐标问题的求解，提供了一种方法。

In plane polar coordinate system , this paper deduces the basic formulas that determine the form of stress functions and puts forward a method for the solutions to the problems in plane polar coordinate of elastic mechanics .

二维各向同性谐振子在平面极坐标系中的归一化径向波函数

Radial wave function of a two dimensional isotropic harmonic oscillator

在平面极坐标系下，导出电子在半圆型量子线中运动的等效薛定谔方程，与一维自由电子运动的不同之处，方程中含有一有效势Veff。

From plane polar coordinates , drive the equivalent schrodinger equation electronic transport in semicircular quantum wire , compare with one dimensional free electronic motion , see that the equation have a effective potential .

研究了一个变摆长单摆运动的例子，在平面极坐标系下给出了描述该运动的二阶微分方程组。

The motion of a simple pendulum with varying length coupled with a vertical motion is investigated , the second-order differential equation set of the motion is obtained in terms of plane polar coordinates .

根据动量定理和角动量定理，通过直角坐标系和平面极坐标系单位矢量的变换，给出了推导平方反比有心力场中轨道的一种新方法。

Based on the theorems of momentum and angular momentum , a new method for determining the orbit in central force field of inverse & square law is given by the transformation of unit vectors in two coordinate systems .

在平面上有个极坐标系，不用x，y表示，用r表示到原点的距离，θ表示于x轴的夹角。

If you have polar coordinates that means in the plane , instead of using x and y , you will use coordinates r , distance to the origin , and theta , the angles from the x-axis .

本文主要的工作内容如下：（1）在平面极坐标辛求解体系下，给出了平面单材料、双材料裂纹表面受任意荷载所对应的特解。

The main contents of the present study are expressed as follows : ( 1 ) . The special solutions for arbitrary crack tractions acting on single material and bimaterial cracks under plane assumptions are specified in symplectic solving system .

通过对一维平面转动系中质点运动的一个问题的讨论，分析了平面转动系与极坐标系之间的关系，得到了极坐标系中加速度各项的物理意义。

The discussion on one-dimensional motion of a particle in rotating coordinate system is presented , and the relation of rotating coordinate system and polar coordinate system is obtained . Meanwhile , the physical significance of each acceleration term in polar coordinate system is illustrated .