| 1. | Locally symetry hypersufraces with constant mean curature
关于局部对称空间中具有常数量曲率超曲面 |
| 2. | Submanifolds with parallel mean curvature vector in local symmetric spaces
局部对称空间中具有平行平均曲率向量的子流形 |
| 3. | The text for this class is differential geometry , lie groups and symmetric spaces by sigurdur helgason ( american mathematical society , 2001 )
然而课程还将简单介绍了基本的黎曼几何和复流形的知识，并会详细讨论半单李群和对称空间的理论。 |
| 4. | The text however develops basic riemannian geometry , complex manifolds , as well as a detailed theory of semisimple lie groups and symmetric spaces
然而课程还将简单介绍了基本的黎曼几何和复流形的知识，并会详细讨论半单李群和对称空间的理论。 |
| 5. | In this paper , the authors give the globally classfication of the maximal totally geodesic submanifolds with maximal rank of normal riemannian symmetric spaces by computing the fundamental group
摘要通过计算全测地子流形的基本群，确定了紧正规黎曼对称空间的极大的极大秩全测地子流形的整体分类。 |
| 6. | Prototype of the symmetrical typical voltage space - vector of open - loop variable frequency speed system is designed by using the tms320f240 digital controller and the ipm ( intelligent power model ) , with which had a exam on the motor and the experimental results are also given . from the results we can conclude that the results are according with the theory analysis
利用ipm智能功率模块，设计了采用基于tms320f240数字控制器的对称空间电压矢量的开环变频调速系统的原理样机，对电机进行了空载实验，给出了它们的实验结果，实验结果和理论分析相一致。 |
| 7. | This paper is to study harmonic maps into symplectic groups and local isometric immersions into space forms by means of the soliton theory . by realizing an action of the rational loop group on the spaces of corrsponding solutions , we get the backlund transformation and the darboux transformation , and thereby we give the explicit construction for harmonic maps into symplectic groups and local isometric immersions into space forms via purely algebraic algorithm
主要用孤立子理论研究到辛群的调和映射和到空间形式的局部等距浸入，通过有理loop群在其解空间上的dressing作用，给出b icklund变换和darboux变换的显式表示，从而获得到辛群及其对称空间的调和映射和到空间形式的局部等距浸入的纯代数构造方法。 |
| 8. | Based on the tms320f240 controller produced by ti company , the hardware and software designation of the symmetrical voltage space - vector pwm is presented . designed a digital controller with tms320f240 to modulate the speed of the motor , in which the keyboard and led display are bedded . it can be to set the frequency of motor and display the run frequency of motor in real time
基于ti公司的tms320f240控制芯片，介绍了对称空间电压矢量硬件设计和软件设计，采用tms320f240设计了一款用于电机变频调速的数字控制器，该控制器上设计有键盘和led显示，可以设定和动态显示电机运行频率。 |
| 9. | Variable frequency speed regulation system based on the voltage space - vector is researched in this paper , the principle of the voltage space - vector is presented , and the third part " s software strategy of voltage space - vector is analyzed , the method of the third part " s software of voltage space - vector is imitated with simulink . at the same time , the duty time and duty order of the two zero - vector are analyzed and showed that the voltage space - vector pwm is actually a modulated method by adding the harmonic to the sine wave
本文对基于空间电压矢量的变频调速系统进行了研究，叙述了空间电压矢量的原理，对ti公司第三方软件的对称空间电压矢量的算法进行了分析，并用simulink对该方法进行了仿真，对两个零矢量的作用时间和作用顺序进行了分析，指出空间电压矢量pwm实质上是一种谐波注入的调制方法。 |
