坐标系的

Use the image of cartesian coordinate system to solve trigonometic problems.

用直角坐标系的图像来解决有关三角函数的题目。

For this purpose we have to know the relative positions of the two co-ordinate systems in question at every moment.

为了这个目的，我们必须知道在每个时刻这两个坐标系的相对位置。

In a threedimensional coordinate system, a third line is used to represent depth.

轴 在使用了坐标系的图表或其他二维系统中，描绘点时作为参照使用的水平线或垂直线。

To solve these problems, a new method for SVPWM based on 60° coordinate system is presented in this paper.

为解决这一问题，该文研究一种基于60°坐标系的空间矢量脉宽调制方法。

The screen coordinates of space a...

屏幕坐标系的变化以及空间坐标随时间的变化。

Point algorithms on elliptic curve are essential operations in ECC and its speed are decided by selected coordinate.

椭圆曲线上点运算是该密码体制核心运算，而坐标系的选取决定了点运算速度。

Adopting inertial coordinate frame simplifies modeling process and the dynamic inflow model can easily be incorporated without multi-blade coordinate transformation.

本文基於惯性坐标系的旋冀气弹建模方法简化了建模，方便地嵌入了动态入流模型。

System speaking of the Master CAM, first must establish the components the geometry model, according to the components actual size, draws its processing part the contour line, does not need to draw the entire components the model, guaranteed the computation production the cutting tool way coordinates accuracy, and may use the Master CAM Chinese Library level the function, when determination cutting tool way, transfers or the hideaway, the selective treatment needs contour line; Next, the formulation processing craft and the definite craft parameter, chooses the cutting tool, the processing semi finished materials, the work piece origin of coordinates again and so on, establishes the work piece coordinates system, definite work piece coordinate system and engine bed coordinate system relative size, thus obtains the components processing correct cutting tool way; Finally, the simulation function which system provides using the Master CAM, the realization simulation processing.

对于Master CAM系统而言，首先要建立零件的几何模型，根据零件的实际尺寸，画出其加工部分的轮廓线，无需画出整个零件的模型，以保证计算生成的刀具路径坐标的正确性，并可利用Master CAM中图层的功能，在确定刀具路径时，加以调用或隐藏，来选择加工需要的轮廓线；其次，制定加工工艺并确定工艺参数，再选择刀具、加工毛坯、工件坐标原点等，建立工件坐标系统，确定工件坐标系与机床坐标系的相对尺寸，从而得到零件加工的正确刀具路径；最后，利用Master CAM系统提供的仿真功能，实现模拟加工。

Therefore, simulation system based on Polar Coordinates was firstly developed in the paper.

为此作者在国内首次研究开发了基于柱坐标系的充型与凝固模拟系统。

The principle of indirect torque control based on quiescent coordinate is analyzed.

分析了基于静止坐标系的间接转矩控制原理。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了