theory n. 1.理论,学理,原理。 2.学说,论说 (opp. hypothesis)。 3.推测,揣度。 4.〔口语〕见解,意见。 the theory of two points 两点论。 Darwin's theory of evolution 达尔文的进化论。 theory of equations 【数学】方程论。 theory of everything 【物理学】(把相对论、量子论和宇宙大爆炸理论都包括在内的)万用理论。 theory of relativity 【物理学】相对论。 the atomic theory 原子说。 Our scheme is good both in theory and in practice. 我们的方案在理论上和实施上都是好的。 combine [separate] theory with [from] practice 理论结合[脱离]实际。 My theory is that we must bring new blood into the Institute through appointment of younger men to important positions. 我的意见是我们学院应该通过重用年轻一些的人来注入新的血液。 theory of games 博弈论,对策论,权衡利弊得失的形势分析。
Based on the vector of point, the formula of moving envelope surface of the assembly part is given . according to determinant and vector theory, the method of working out the three-dimensional space arbitrary polyhedron volume is described 基于三维矢量理论和行列式理论,解决了计算三角面片的任意多面体体积及评估零件所需的实际装配空间等问题。
The main contents of the study as follows : ( 1 ) an introduction to the space vector theory and its application on the modeling of pmsm is presented firstly, which shows the basic idea of pmsm dtc . a comparison of dtc in asynchronous machine and pmsm is made as well . in order to take the full advantage of the dtc, the pmsm has to be properly selected 本文的主要内容包括:(1)由空间矢量模型推导出永磁同步电机的磁链、电压和转矩的公式,描述了永磁同步电机转矩直接控制的基本控制机理,分析了永磁同步电机与感应电机在转矩直接控制方式上的不同之处以及转矩直接控制对永磁同步电机的要求。