使用双极坐标系研究流体在偏心环空内的流动。
The bipolar coordinate system in which the two boundary circles of eccentric annuli become the coordinate surfaces is used.
在双极坐标系内，利用有限体积法对控制方程离散求解。
The governing equations were discretized using a finite volume method on a bipolar coordinate system.
解双极坐标下拉氏方程得出半空间中无限长水平圆柱体电场问题的解析解。
The half-space analytic solutions of the electric field of an infinite horizontalcylinder are acquired solving the Laplace equation in the double-polarcoordinates.
本文介绍了一种用双极坐标映射和降噪的方法对虹膜图像进行归一化，可以有效的将不同心的环形图像映射到双极坐标系上。
An approach of mapped with bipolar coordinate and reduce noisy is used to normalize iris image in this paper, and annularity image with different centre is mapped onto bipolar coordinate efficiently.
介绍了在CZ45 0齿轮整体误差测量仪上利用极坐标法测量双联齿轮、插齿刀和剃齿刀的端面渐开线齿形的方法，从而扩展了CZ45 0的测量功能。
A method of measuring contrate involute errors of double gears, gear shapers and gear shavers on the CZ450 gear integrated error tester using the polar coordinate method is introduced.
针对双配重固定半径极坐标方式的砂轮动平衡测控系统，介绍了其内部结构和工作原理；
Aims at grinding wheel dynamic balance measurement and control system of double heavy-fixed polar coordinates mode.
总结了谱方法椭圆问题与双曲问题中的研究进展 ；论述了球面坐标和极坐标下的谱方法 ；
The development of spectral method on elliptical and hyperbolic problems is summarized, and spectral method under sphere coordinates and polar coordinates is touched too.
总结了谱方法椭圆问题与双曲问题中的研究进展 ；论述了球面坐标和极坐标下的谱方法 ；
The development of spectral method on elliptical and hyperbolic problems is summarized, and spectral method under sphere coordinates and polar coordinates is touched too.
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