坐标系的

In the program, because of adopting local coordinate system, the condition of friction and displacement were easy to be introduced, and the general-strong equation kept symmetrical.

在程序中，由于采用了局部坐标系，使得摩擦条件和位移边界条件的引入非常方便，并且总刚度方程还是对称的。

The Lorentz transformation does not represent the two coordinate system with two reference of both time and space.

洛伦兹变换的两坐标系不能代表两参考物的两个时空。

Considering the complicity and higher predicted water cut in the polymer flooding model developed by Zhou Zhijun,expanding this model by Maclaurin series,a linear relation was obtained between d(Wp-aNp3)/dNp and Np in Cartesian system.

针对周志军等建立的聚合物驱驱替特征模型较为复杂、应用不方便，且后续水驱阶段预测偏差较大的问题，将该模型用麦克劳林级数展开，推导出d(Wp-aNp3)/dNp与Np在直角坐标系下存在线性关系。

The equations of onedimensional threetemperature radiation magnetohydrodynamics, which are to describe the plasma process of Zpinch, were set up under Largrangian coordinates.

在拉格朗日坐标系下，建立了描述Z箍缩等离子体内爆动力学过程的一维三温辐射磁流体力学方程组，并编制了相应的拉氏程序。

A Taylor-Galerkin fractional step method of two steps with the second order accuracy in time and space was developed to deal with the 3-D nonlinear large-amplitude sloshing problem. The calculation coordinates was fixed in the container, and the external excitation was regarded as the mass force.

取与容器固结的坐标系，将外激励视为质量力，针对刚性容器内流体非线性大幅晃动问题，提出了在时间和空间上均具有二阶精度的两步Taylor-Galerkin分步有限元方法。

The Failure model of slopes can be classified into 2 kinds, toppling model and sliding model. The force distribution of each model is analyzed in oblique coordinate system, and the equation to calculate the forces are derived. Many external forces, such as earthquake force, water pressure, bursting force, bolting force and etc., can be easily considered in these equations.

分析了倾倒模式和滑动模式两种岩质边坡的破坏型式，对其受力情况进行了分析，并利用刚体平衡理论，给出了在斜角坐标系下推力计算方程，该方程可以方便地考虑任意方向的地震力作用，还可以考虑水压力、锚固力、建筑物外荷载和其它人工作用力。

This thesis make a study on Vector-control VVVF system of asynchronous motor. In the course of study,making use of the mathematical model of asynchronous motor in MT axes . Then both open-loop control system and close-loop vector-control system are respectively simulated with simulation block SIMULINK in MATLAB.

本文对异电动机变频调速系统进行了研究、利用异步电动机在二相同步旋转MT坐标系下的数学模型，使用MATLAB中的仿真工具箱SIMULINK分别对开环控制系统和闭环矢量控制变频调速系统进行了仿真。

This thesis make a study on Vector-contorl WVF system of asynchronous motor. In the course of study, making use of the mathematical model of asynchomous motor in MT axes. Then both open-loop control system and close-loop vector-control system are respectively simulated with simulation block SIMULINK in MATLAB.

本文对异步电动机变频调速系统进行了研究，利用异步电动机在二相同步旋转MT坐标系下的数学模型，使用MATLAB中的仿真工具箱SIMULINK分别对开环控制系统和闭环矢量控制变频调速系统进行了仿真。

It is concluded that the value of the M-integral does not depend on the origin selection of the global coordinates, either on the shifts of the origin, or the coordinate rotation.

结论表明M积分值不但与全局坐标系原点的选择，而且与原点的移动和旋转无关。

Currently, orthogonal coordinates one-way wave downward continuation has been accepted by petroleum industry as a tool for imaging complex geology because of its efficiency, accuracy, stability and ability of handling rapid velocity variation.

目前，正交坐标系单程波下行延拓以其计算效率、精确性、稳定性和处理高速变化速度模型的能力，成为工业界普遍采用的复杂介质成像方法。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。