theory n. 1.理論,學(xué)理,原理。 2.學(xué)說,論說 (opp. hypothesis)。 3.推測,揣度。 4.〔口語〕見解,意見。 the theory of two points 兩點論。 Darwin's theory of evolution 達爾文的進化論。 theory of equations 【數(shù)學(xué)】方程論。 theory of everything 【物理學(xué)】(把相對論、量子論和宇宙大爆炸理論都包括在內(nèi)的)萬用理論。 theory of relativity 【物理學(xué)】相對論。 the atomic theory 原子說。 Our scheme is good both in theory and in practice. 我們的方案在理論上和實施上都是好的。 combine [separate] theory with [from] practice 理論結(jié)合[脫離]實際。 My theory is that we must bring new blood into the Institute through appointment of younger men to important positions. 我的意見是我們學(xué)院應(yīng)該通過重用年輕一些的人來注入新的血液。 theory of games 博弈論,對策論,權(quán)衡利弊得失的形勢分析。
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 基于三維矢量理論和行列式理論,解決了計算三角面片的任意多面體體積及評估零件所需的實際裝配空間等問題。
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 本文的主要內(nèi)容包括:(1)由空間矢量模型推導(dǎo)出永磁同步電機的磁鏈、電壓和轉(zhuǎn)矩的公式,描述了永磁同步電機轉(zhuǎn)矩直接控制的基本控制機理,分析了永磁同步電機與感應(yīng)電機在轉(zhuǎn)矩直接控制方式上的不同之處以及轉(zhuǎn)矩直接控制對永磁同步電機的要求。