直角坐标系

在图6-1（c）中，质点的运动是用直角坐标系来描述的。

In Fig. 6-1 ( c ), the motion of a particle is referred to by a rectangular coordinate system .

本文根据不同空间直角坐标系的关系，提出了一种利用线性回归理论解决GPS大地坐标向地方坐标系坐标转换的新方法。

Based on the relation between different spatial rectangular coordinate system , this paper presents a new method to solve the transformation of GPS geodetic coordinate to local coordinate system .

GPS基线向量网在空间大地直角坐标系下的三维约束平差

Tri-dimensional Adjustment of GPS Baseline Vector Network with Constraint Conditions in Rectangular Space Coordinates

转换VB坐标系为直角坐标系

Change VB coordinate into rectangular coordinates system

然后从xy平面来看，就是极坐标中的距离。，seen，from，the，point，of，view，of，the，xy，plane。，但是这里，看起来还是个直角坐标系。

Then , r of course is a polar coordinate r But here , it looks more like you have rectangular coordinates again .

该软件界面友好，实现了在道路工程平面直角坐标系下GPS工程控制网平差的功能。

This software has friendly interface and it has realized the function of GPS engineering control network adjustment under the plane rectangular coordinate system of road project .

如果在直角坐标系下做的话，变成了x^2+y^2，of，course，，r，squared，becomes，x，squared，plus，y，squared，这就是原点到所在点距离的平方。

If you are going to do it in x , y coordinates , r ^ 2 it is the square of the distance from the origin .

本文推导了二维直角坐标系均匀网格FDTD基本算法递推公式，以及FDTD收敛条件。

This article is derived the basic algorithm recursive formula of FDTD and its convergence condition on Two-dimensional cartesian uniform grid .

推导了直角坐标系中非平面对称磁场各个分量的空间分布表达式，它们是关于z的泰勒展开式。

The space expansion tor each component of the magnetic field without symmetric plane is derived in Cartesian coordinate system , which is in Taylor series of z.

最后，利用直角坐标系下的时域有限差分算法，我们详细讨论了光子晶体在提高GaN发光二极管光输出效率中的作用。

Finally , we have systematically studied the effect of the photonic crystal on improving the light extraction efficiency of the GaN light emitting diode .

为明确TIPSS的最佳穿刺点，本文对正常肝脏和肝硬变患者各50例的肝脏的MRI或CT增强扫描图像进行了研究，并依此建立了空间直角坐标系。

To define the most appropriate puncture sites of TIPS , the spatial rectangular coordinate system was established with MR imaging or CT contrast enhancement scan films of liver .

首先给出直角坐标系下弹丸质心运动方程组，研究如何采用MATLAB建立直角坐标系下外弹道质心运动系统的仿真模型，进行仿真实验并对实验结果进行分析。

At first , the equations of mass trajectory of pill in the rectangular coordinates system are discussed ; secondly , the design of the simulation model with MATLAB , as well as the experiment analysis , has been discussed .

同时我们还讨论了FCT格式，它也可用于非直角坐标系，并有一定的实用价值。

Finally we discuss the FCT schemes , which can be used to practical problems in the non-Cartesian coordinates .

为了适应数值模拟浅水涌波的需要，给出了冻结直角坐标系下的浅水波方程组系数矩阵的Roe平均法。

For the need of numerical simulating the shallow water bore , the Roe average method about the coefficient matrix of shallow water wave equations is presented .

我们在直角坐标系中处理，在这里dV有可能变成，或者它们的其他排列。

Well , we can do that in rectangular coordinates dz dx dy where dV becomes something like , maybe , dz dx dy , or any permutation of these .

它是纯三维的，在xyz直角坐标系中，用差分法计算电场，用Runge-Kutta法计算电子轨迹。

It is true three-dimensional , electric fields being calculated by using the finite-difference method and electron trajectories being calculated by using the Runge-Kutta method in XY Z rectangular coordinates .

本文从普遍的正交曲线坐标系中的拉普拉斯（Laplace）差分方程出发，导出了直角坐标系中的差分方程；

In this paper a method for deriving the corresponding finite difference equation in the rectangular coordinate system from the finite difference approximation to Laplace equation in the general orthogonal curvilinear coordinate system has been described .

本文详细介绍了一种用在AutoMesh&自动可调直角坐标系下的非均匀FDTD网格生成系统中生成非均匀网格的算法。

In this paper , an algorithm is introduced in details , which can generate the non-uniform mesh and has been applied to " AutoMesh : An Automatically Adjustable , Non-uniform , Orthogonal FDTD Mesh Generator " .

前者通过高斯投影，将WGS-84坐标系的GPS经纬度数据转换为平面直角坐标系的数据，从而计算平均速度。

In the first one , the longitude and latitude data in WGS-84 are transformed into the data in two-dimensional rectangular coordinate through the Gauss projection coordinate transformation , and the average speed estimation is achieved .

一种方法是借助于Laplace变换及其微分性质，并将坐标原点选在荷载影响范围以外足够远的地方，在直角坐标系下实现了与柱坐标系下类似的求解方法。

One is similar to the method of the cylindrical coordinate system , with the help of Laplace transform and its differential properties and putting the origin of coordinates to a point enough distant from accessional loading .

通过在被测视场区域内沿轴系分别摆放一个标志点确定直角坐标系的X轴与Y轴，并在此坐标系内按照一定关系摆放五个标志点，利用全站仪测得其世界坐标值。

By putting landmarks along axises in the measured visual field respectively , the X-axis and Y-axis of Cartesian Coordinates is determined firstly . Then another five landmarks are placed according to some rules in this system . Their world-coordinates can be measured using total station instrument .

本文利用旋转矩阵（R），度量矩阵（H）和雅可比矩阵（J）按矩阵代数导出不同大地坐标系和不同空间直角坐标系的换算公式。

This paper deals with the formulae for transformation between two different geodetic coordinate systems and between two different rectangular space coordinate systems derived in terms of the matrix algebra with rotation ( R ) , metric ( H ) and Jacobian ( J ) matrices .

Berenger提出的完善匹配层只能用于直角坐标系。

Perfectly matched layer absorbing boundary proposed by Berenger can be used only in rectangular coordinates .

BJ-54坐标系与BJ-54平面直角坐标系，坐标投影的正、反解方程。

A detailed study of the equation and the inverse equation in projection coordinate between BJ-54 coordinate system and BJ-54 plane coordinate system .

地下水三元补给体系的各补给源补给的混合比率，其数值等于在U含量-234U过剩直角坐标系中，以该三个端元为顶点围成的三角形内被补给点的面积坐标。

In the three source recharge system , the mixing ratios originating from every recharge source , equals the area coordinate value of the triangle that is enveloped by the three sources as top points in the right angle coordinate of the U content 234 U excess .

文中给出了直角坐标系下门架式水力插板桩抗滑移稳定性计算的简化Bishop积分方法和安全系数表达式，并编制了安全系数计算程序。

In a conventional Cartesian coordinate system , a simplified Bishop integral method and the expression of the safety factor about the stability against slide are presented in this paper , and a program is presented for safety factor calculation .

然后在平面直角坐标系下将弹性力学问题引入到Hamilton体系中来，针对弹性力学混合方程建立了一种新的辛型数值计算方法&基于Hamilton体系的弹性力学辛差分方法；

Then the equations of elastic problem are imported into the Hamilton system in the plane right-angle coordinate system and a new symplectic numerical method , the symplectic difference method of elasticity in Hamilton system , is put up based on the mixed equation of elastic problem .

就曲面在空间直角坐标系下的几何特性作了一个直观的描述，即曲面的两个主曲率半径倒数之积为Gauss曲率并且它是一个内在几何量。

In this paper the geometric characteristic of the curved surface under the condition of the spatial vertical angle coordinate system is directly described , i.e. , the product of reciprocal of the two principal radius of the curved surface is Gauss curvature and it is an inner geometric quantity .

在球坐标系和直角坐标系下我们用Einstien-Tolman（E-T）表述计算球对称静态引力场的能量密度，发现在球坐标系下能量密度为负，而在直角坐标系下能量密度为正；

It is found that energy density of static sphere symmetry of gravitational field is negative in the sphere coordinates and their energy density is positive definite in the Cartesian coordinates .

将体电流法应用于直角坐标系，计算了两种TWG结构的散射场及消光比特性，其折射率在纵向剖面上分别为正弦型和阶跃型分布。

By appling Volume Current Method to the orthogonal coordinates , the scattering fields and the PERs of two types of TWG are calculated , the index profile of which is sinusoidal and step-index , respectively .