矢量

Simulation results show that it can improve the systems performance with low torque ripple, using the null vector rationally.

仿真结果表明，正确地使用零电压矢量能够有效减少转矩脉动，改善系统性能。

The second and more important qualification is that , for reasons explained in our earlier papers , it is inappropriate to use t-tests for the individual slope coefficients derived from the second-stage cross-section analysis as a measure of the significance of individual factor risk premia , A joint test , which can be used to determine whether the risk premia vector is null , is the appropriate one to use , although neither it nor the t-tests can indicate whether an individual factor-risk premium is significant .

第二的和更多的重要资格是那，对于理由在我们的较早文件中解释，使用 t 是不适当的-测试对于起源于如对个别因素危险 premia 的重要性的衡量第二个阶段的跨区段分析的个别倾斜系数，一个关节能用来决定危险 premia 矢量是否是无效力的测试是使用的一个适当的，虽然既不是它也不是 t-测试能指出个别的因素-危险的额外费用是否是重要的。

An input phase voltage is divided into a main range and a transition range in which new P, M, N conditions and PM, NP, MN transition conditions are defined, some null vector is selected and the condition combination sequence of bidirectional power switches are adjusted in each modulation period to realize the safe, reliable and rapid commutation and the stable operation of the matrix converter.

本发明属于矩阵变换器控制技术，为一种用于矩阵变换器的控制方法，通过把输入相电压划分为主区间和过渡区间、在过渡区间定义新的P、M、N状态和PM、NP、MN暂态以及在每个调制周期内选择特定的零矢量并调整双向功率开关状态组合顺序，实现矩阵变换器安全、可靠、快速换流和稳定运行。

Using Matlab and its Add-ons Simulink, through establishing simulation maths model, the paper integrates open chain vector equation, numerical value simulation (computing velocity and displacement while given acceleration) and matrix algebra, etc.

利用MATLAB及其附加软件Simulink，通过建立仿真数学模型，综合开环矢量方程、数值仿真(在加速度已知时计算速度和位移)、以及矩阵代数等来完成机器人动态仿真，对所研究的机器人运动学分析结果进行验证，结果基本一致，为机器人的后续研究，如动力学，控制等奠定基础。

Use the vector dot product to find the obtuse angle between two diagonals of a cube .

用矢量点积求立方体的两条对角线所夹的钝角。

Ultimately,on the designed experimentative platform of the vector control system,we performed the motor experiment of off-load and on-load under different frequencies,at the same time we analyze the results and validate the feasibility of the system designed scheme.

最后，在所设计的矢量控制调速系统实验平台上，进行了电机在不同频率下的空载和带负载的实验，并对实验结果进行了分析，验证了系统设计方案的可行性。

However, as a new drive technology, there are many problems and issues to be investigated and be solved in oil rig as a potential alternative to the conventional SCR, for example, energy consumption brake technol...

给出了现场试验结果并对转盘控制系统的工作特性进行了分析，现场试验结果表明：该转盘控制系统的矢量调速方案及转速环、转矩电流环的设计是可行的、正确的，能够满足钻井工艺的要求。

Recommend we adjust re-entry point to Omicron J-Vector Theta.

建议我们调整进入奥米克戎区矢量J太塔区的再入点。

The segmentation and recognition methods of the omnirange character string which is adhered or intersected with the lines in the engineering drawing vectorization are described in this paper.

描述了工程图纸矢量化中多向粘连字符及字线相交的分割算法与识别方法。

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。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。