该模型采用三层平面布置的带电圆盘来模拟雷云空间，雷云静电场的计算采用镜像法。
The model simulating thunderstorm cell by means of three layers plane charged disk, the calculations for thundercloud electrostatic field use mirror method.
本文基于光学三角法测量原理，设计了一种通过改变光平面与成像光轴夹角来实现对视场内被测零件表面扫描的视觉测头。
A novel noncontact scanner that scans the inspected part's surfaces by changing the Angle between laser plane and optical axis is designed based on optical triangulation.
将连续法引入机构动力学，研究了平面一般三弹簧系统的静力逆分析，得到了该系统的全部平衡位置。
In this paper, the inverse force analysis of planar three spring system is studied using numerical continuation. All static equilibrium positions of the system is obtained.
提出了平面四杆机构综合（包括函数综合、轨迹综合和导引综合等三类基本问题）的数值比较法。
The numerical comparison method is presented for planar four-bar linkage synthesis including function synthesis, path synthesis and guidance synthesis.
对称三层非线性平面光波导的数值计算实例与有限元法的结果完全一致。
Numerical results for symmetric structure are in good agreement with that obtained by the finite element method.
提出了三种计算结构位移比的补充方法，即第一振型法、弹性时程分析法和推算平面端部位移法。
Three additional displacement ratio calculating methods, i. e., the first mode method, elastic time history analysis method and calculating plane end displacement method, are suggested.
本文基于波前法提出了一种对任意平面区域生成三角形网格的全自动生成算法。
Based on the advancing front method, an automated triangular mesh generation algorithm for arbitrarily shaped planar regions is presented in this paper.
运用球面图法及平面三角法，计算了三种组合夹具实例的空间角度及空间点的坐标。
By means of spherical graphics and plane trigonometry, space angle and space point coodinates are calcullated for three sets of combined fixtures as examples.
该法在行波法生成平面三角形网格的基础上，将一个三角形单元分解为三个四边形单元。
Based on the advancing front technique developed for triangular mesh generation, quadrilateral mesh can be generated by dividing each triangular element into three quadrilateral elements.
目的探讨实时三维超声心动图（RT-3DE）全容积成像及双平面法测量左心室容积的可行性和准确性。
Objective To evaluate the feasibility and accuracy of real-time three-dimensional echocardiography (RT-3DE) full volume and X-plane for quantifying the volume of left ventricular (LV) models.
利用全矢量平面波法计算了三角结构的光子带隙型光子晶体光纤的带隙分布。
The photonic band-gap of triangle structure photonic band-gap PhotonicCrystal Fiber (PBG-PCF) is computed by FPWM.
该文采用小波矩量法求解导电平面上的三维腔体散射，利用小波变换稀疏化矩量矩阵，加速其求逆，减少了腔体散射的总体计算时间。
Scattering from three-dimensional cavities is solved using the wavelet-MoM method, while the moment matrix is sparsified with help of the wavelet transform.
根据三维造型数据，采用基于等距面的截平面法进行精加工。
According to the geometrical data of a three-dimensional model, finish machining strategy with section plane method is adopted on the basis of the offset surface.
抛弃了运用透视法和光线的明暗在二维平面上创造三维空间和塑造物体的体积感的幻觉艺术语言的方法。
Master Abandoned using perspective and radial light and shade in the 2d and 3d space creates the illusion of volume of objects of art language.
用最小包容区域法求平面度误差。最小包容区域判别准则有三角形准则和交叉准则。
Flatness error was obtained by minimum zone law which decided by triangle rule and cross rule.
第5章主要介绍了展开实体创建模块，基于三角形等面积法将三角形网格结点映射到平面上，用样条曲线将周边结点连接起来，得到展开视图。
The mapping problem of triangular crunodes is resolved based on the same area in the Chapter 5. The developing view can be gained when the boundary crunodes are connected by the Spline.
本文基于三角形网格划分，采用有限元法，建立了平面二维非恒定潮流数学模型。
Based on triangular grids and finite element method, a planar 2-d unsteady tidal flow mathematical model is established in the article.
利用平面波法分析了二维液晶光子晶体的带隙结构，着重对三角形和正方形空气孔光子晶体带隙随液晶旋转角的变化情况进行了分析和比较。
The influences of the wave vectors off the periodic plane on the distribution of energy bands of triangular, honeycomb and square lattices are analyzed by plane wave method.
设计方案中对已有的数字高程模型进行加密内插，使用三角化方法来计算地表曲面面积，采用参考平面法实现区域通视分析。
Then triangulation is used for the calculation of a polygon's surface area, and viewshed analysis is carried out using the method of reference plane.
方法应用三维超声平面体积测量法测量173例孕龄2 2～39周正常胎儿肝体积。
Methods Fetal liver volume from 173 normal fetuses, ranging between 22~39 weeks old, was individually measured by three dimensional ultrasound.
基于波前推进法提出了一种针对任意平面区域生成三角形网格的全自动生成算法。
A new triangulation algorithm based on Delaunay triangulation and the advantage of simplicity and rapidness of advancing front method is constructed.
实验以一平面石膏为测量对象，根据测量结果，验证了该方法的正确性和有效性，对采用相移技术的三维测量法具有重要的意义。
Experimental results show the method correctness and validity through having an experiment on testing a gypsum plane. The way is significant for the 3-d measurement with phase shifting technology.
实验以一平面石膏为测量对象，根据测量结果，验证了该方法的正确性和有效性，对采用相移技术的三维测量法具有重要的意义。
Experimental results show the method correctness and validity through having an experiment on testing a gypsum plane. The way is significant for the 3-d measurement with phase shifting technology.
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