例句與用法

1. Considered the relationship between the dirac structures of poisson - nijenhuis manifold and the basic vector field , we proof that the basic vector field can keep the dirac structures of poisson - nijenhuis manifold which discussed before
   考慮了基本向量場與dirac結(jié)構(gòu)的關(guān)系，在前三節(jié)的基礎(chǔ)上證明了基本向量場可以保持上述李雙代數(shù)胚上的dirac結(jié)構(gòu)。
2. The last , we study the properties of the basic vector field and 1 - form in the poisson - nijenhuis manifold , making a systematic organization of these contents and giving some appropriate adds . therefore , we unified with the conclusion of the poisson vector field on poisson manifold in reform
   最后我們研究了poisson - nijenhuis流形上基本向量場和基本1 -形式，對已有的成果進(jìn)行了系統(tǒng)的整理，并加以補(bǔ)充。由此將poisson - nijenhuis流形上基本向量場和泊松流形上的泊松向量場從形式上得到了統(tǒng)一。
3. The feasibility of decomposition of transition firing sequence , the application of them in the detecting lfs and the reverse course of decomposition - synthesis are discussed . they provide theoretic basis for our algorithm in the field of petri net . supported by the above , two main part is included in the algorithm : at first , x is transacted according to the following method in order to get a set of xb named as basic vector of x which is the firing count vector of a directed path without circle if md is reached from m0 in the rg ( m0 )
   在變遷序列分解的指導(dǎo)思想下，我們的算法主要通過以下兩步工作完成： ( 1 )首先對給出的已知條件中滿足狀態(tài)方程的n維非負(fù)整數(shù)向量進(jìn)行處理，得到一組x的基礎(chǔ)向量x _ b ，使得在petri網(wǎng)的可達(dá)標(biāo)識圖中，若存在一條由m _ o到m _ d的有向無環(huán)路，則x _ b為這樣的路上變遷引發(fā)序列的發(fā)生數(shù)向量。
4. In this paper the tendency of motion control is introduced first . next the basic vector control principle and coordinate transformations are presented . the mathematic model and the equiva1ent circuit of induction motor are also proposed . on the basis of the former theory a dynamic structure of sensorless vector - controlled system is designed here . a new flux observer and a new method of speed estimation are put forward also . and then the model of the control system is established . following those , the author simulates the dynamic 2 system using the advanced language c + + and analyzes the result
   本文首先介紹了交流傳動的發(fā)展動向，接著闡述矢量控制基本原理、坐標(biāo)變換和異步電機(jī)數(shù)學(xué)模型及其等效電路。在此基礎(chǔ)上，本文設(shè)計(jì)一種無速度傳感器矢量控制系統(tǒng)動態(tài)結(jié)構(gòu)，應(yīng)用狀態(tài)估計(jì)與狀態(tài)觀測器理論，提出了新型磁通觀測器結(jié)構(gòu)和速度推算方法，對控制系統(tǒng)建立數(shù)學(xué)模型，用c + +語言進(jìn)行動態(tài)仿真，并對結(jié)果進(jìn)行理論分析，通過仿真實(shí)驗(yàn)證明方案的有效性和正確性。