坐标变换

A 3D finite element model for calculating the casing stress in the directional wells was developed based on the theory of coordinate conversion.

摘要基于坐标变换方法建立了适用于任意井眼轨迹的定向井套管应力三维有限元计算模型。

In this paper a method of automatic mesh generation of triangular element is presented by using subdomain structure and isoparametric coordinate transformations for two-dimensional complex connected domain with multidielectric.

本文采用子区域结构，等参坐标变换方法，对具有多种介质的二维复连通区域，给出一种三角形单元的网格自动剖分方法。

Vector and coordinate transformation are used to analyse the work surface equation and the slip velocity between the cam and idler wheels, also the dynamic characteristics of pistons, cylinders and? principal axis of the contrapositive cam engine.

研究了对置式凸轮发动机的运动学与动力学特性，利用向量与坐标变换法分析了对置式凸轮发动机的工作曲面方程和滚轮相对滑动速度等运动学性能，分析了活塞、气以及主轴等部件的动力学特性。

In order to ensure the precision and reliability, this paper designs the GPS/Loran C/SINS/AHRS integrated system. In this integrated system, the self-adaptive federated Kalman filter is introduced to revise strap-down inertial navigation system; the heading angle attitude and heading reference system is used to ensure the convergence of heading angle; and the coordination transformation for Loran C is applied to eliminate the constant error of Loran C.

针对导航精度及可靠性，设计了GPS/罗兰C/SINS/AHRS组合导航系统，该组合导航采用了自适应联邦卡尔曼滤波的方法，通过闭环形式校正SINS，并用姿态航向参考系统代替捷联惯性导航系统输出的航向角以保证航向角的收敛，同时对罗兰C的测量值进行坐标变换以消除由于坐标系不同而带来的常值误差。

Aiming at this problem,by the coordinate transformation of shape function the idea of super-element is adopted to divide grid with the programming of Fortran language.

针对这一问题，采用超单元网格剖分的建模思想，通过基于形函数的坐标变换，用Fortran语言编程实现网格剖分。

Based on the switch process of work piece coordinate system to machine coordinate system, explained the function and principle of aiming at tool operation.

根据工件坐标系向机床坐标系的坐标变换过程，说明对刀操作的作用和原理。

As a result, considering all kinds of methods of error compensation, a kind of calibration model of graphic distortion is established based on geometrical correction arithmetic of plane coordinate transformation.

综合各种误差补偿办法，建立了一个基于平面坐标变换几何校正算法原理的图形畸变校正模型。

Coordinate transform ; ring direction ; concave-convex feature

坐标变换；环走向；凸凹性

Aimed at spherical, cylindrical, conical and toroidal electrodes in electrical engineering, based on the corresponding coordinate transformation the randomly meshing surface BEM is put forward.

针对电气工程中常见的球、柱、锥和圆环形电极，建立相应的坐标系，提出了基于坐标变换，适用于任意网格剖分的曲面边界元方法。

Vertical-2D model,-coordinate transformation, free surface, suspended material

垂向二维模型；坐标变换；自由水面；悬浮物

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。