矿用防爆型异步电动机电磁优化设计的研究
作者：
邓引斌;金玲玉
期刊：
煤炭学报 ,1989年37(4):74-82 ISSN：0253-9993
作者机构：
[邓引斌; 金玲玉] 华中师范大学数学与统计学学院
关键词：
异步电动机;防爆型;电磁;优化设计
摘要：
本文从提高矿用防爆型电动机的可靠性出发,以改善电动机的起动性能为目标,较深入地研究了矿用防爆型异步电动机的优化设计问题。本文选用及改进了Hooke-Jeeves 的模矢搜索法、Powell 的共轭方向法及随机方向搜索法,相应编制了3个优化设计程序。实践表明,利用这些程序进行电机的优化设计,可很快得到最佳方案。与优化前比较,一般可使目标函数值下降20％左右。
语种：
中文
展开
CONNECTIVE STABILITY FOR LARGE SCALE SYSTEMS DESCRIBED BY FUNCTIONAL DIFFERENTIAL EQUATIONS.
作者：
RUAN, SG*
期刊：
IEEE Transactions on Automatic Control ,1988年33(2):198-200 ISSN：0018-9286
通讯作者：
RUAN, SG
作者机构：
[R. Shigui] Department of Mathematics, Huazhong Normal University, Wuhan, Hubei, China
通讯机构：
[RUAN, SG] H;HUAZHONG NORMAL UNIV,DEPT MATH,WUHAN,PEOPLES R CHINA.
摘要：
In this note we employ the decomposition-aggregation method, the comparison principle, and vector Lyapunov functionals to investigate the stability of large scale systems described by functional differential equations under structural perturbations. Some sufficient conditions are given such that the zero solution is connectively and uniformly asymptotically stable. An example to illustrate the main results is given. © 1988 IEEE
语种：
英文
展开
The new geometric criterion of polynomial stability
作者：
王晓君
期刊：
应用数学和力学：英文版 ,1988年9(5):485-488 ISSN：0253-4827
通讯作者：
Xiao-jun, W.
作者机构：
[Xiao-jun W.] Department of Mathematics, Huazhong Normal University, Wuhan, China
通讯机构：
[Xiao-jun, W.] D;Department of Mathematics, Huazhong Normal University, China
关键词：
Negative Real Part;Positive Real Part;Real Coefficient;Geometric Criterion;Parametric Graph
摘要：
In this paper, we apply the connugacy and boundedness of the zeros for a polynomial fn(z) with real coefficienta (i=0,1,2...n). A new simple geometric criterion for stability of fn(z) is given which is very convenient for paplication. © 1988 SUT.
语种：
英文
展开
MATRIX WA plus AT W AND ITS APPLICATIONS.
作者：
WU, KQ*
期刊：
International Journal of Control ,1988年47(6):1873-1882 ISSN：0020-7179
通讯作者：
WU, KQ
作者机构：
[WU, KQ] Department of Mathematics , Huazhong Normal University , Wuhan, People's Republic of China
通讯机构：
[WU, KQ] H;HUAZHONG NORMAL UNIV,DEPT MATH,WUHAN,PEOPLES R CHINA.
摘要：
For matrix Awith off–diagonal elements not necessarily of the same sign, conditions are obtained for the existence of a positive definite diagonal matrix W such that matrix WA + tW is positive definite; and the applications of the latter to the determination of the stability of interval matrices are considered. © 1988 Taylor & Francis Group, LLC.
语种：
英文
展开
NECESSARY AND SUFFICIENT CONDITIONS FOR STABILITY OF A CLASS OF INTERVAL MATRICES.
作者：
XIN, LX*
期刊：
International Journal of Control ,1987年45(1):211-214 ISSN：0020-7179
通讯作者：
XIN, LX
作者机构：
[XIN, LX] Department of Mathematics , Huazhong Normal University , Wuhan, People's Republic of China.
通讯机构：
[XIN, LX] H;HUAZHONG NORMAL UNIV,DEPT MATH,WUHAN,PEOPLES R CHINA.
摘要：
In this paper some necessary and sufficient conditions for stability, complete instability and composite stability type of a class of interval matrices are given.
语种：
英文
展开
STABILITY OF INTERVAL MATRICES.
作者：
XIN, LX*
期刊：
International Journal of Control ,1987年45(1):203-210 ISSN：0020-7179
通讯作者：
XIN, LX
作者机构：
[XIN, LX] Department of Mathematics, Huazhung Normal University, Wuhan, People's Republic of China
通讯机构：
[XIN, LX] H;HUAZHUNG NORMAL UNIV,DEPT MATH,WUHAN,PEOPLES R CHINA.
摘要：
In this paper new sufficient conditions for stability and complete instability of an interval matrix JV(P, Q) are presented. They include the corresponding results derived by Heinen (1984) and Xu Daoyi (1985) as particular cases. Secondly, we present the concept of composite type for stability, and simple criteria for this type. © 1987 Taylor & Francis Group, LLC.
语种：
英文
展开
