OALib Journal期刊

ISSN: 2333-9721




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匹配条件: “<br>高 伟” ,找到相关结果约313692条。
Uncertainty analysis of estimation results of chaos systems parameters

GAO Wei,<br>
计算机应用研究 , 2010,
Abstract: This paper presented a statistical method based on Bayes' theorem for quantifying the uncertainties of estimation results of chaos systems parameters due to the observation noise.Conducted a numerical simulation on the typical Lorenz system.And carried out uncertainty analysis of estimation results of the Lorenz system parameters in the case of different noise strength.Finally,proposed the posterior mean value method(PMVM) based on simulations results.Comparison of PMVM and the previous method under the sam...
Doubly Coprime Fractional Representations Related to the Nonminimal Reduced-Order Observer

GAO Zhiwei,<br>
系统工程理论与实践 , 1999,
Abstract: New doubly coprime fractional representations for a stabilizable and detectable linear time invariant system are given explicitly,and the state space interpretation of the parameterization of proper stabilizing controllers is also illustrated. The doubly coprime fractional representations are based on the nonminimal representation of reduced order observers and all the elements are ensured to be proper. Hence, our results obtained in this paper are more general and more suitable for use with the factorization approach compared with the previous ones.

Gao Zhiwei,<br>
自动化学报 , 2000,
Abstract: On the basis of Luenberger state observers, a new parametrization of all function observers for linear systems is presented. The physical significance and the state space realization of this parametrization are also analyzed in detail. The order of the class of all function observers is minimal, which is lower than the known one.

GAO Zhiwei,<br>
自动化学报 , 2000,
Abstract: The design problem of minimal order observer based controllers for properly stabilizing a singular system with direct control feed through term is discussed, and a design method is given. New state space formulae of doubly coprime factorizations for singular systems are then presented explicitly. The resultant controller parameterization can be guaranteed to be proper (or causal), thus the results obtained in the present paper are more significant than the previous ones in control applications.
Study on the Friction Behavior of Sulphurized Carbon Steel

Gao Wei,<br>,施忠良
摩擦学学报 , 1998,
Abstract: The sulphurized carbon steel has good anti friction behavior and is widely used in industry. The anti friction behavior of sulphurized carbon steel by means of low temperature ion sulphurizing has been studied with pin on ring tester. The effect of variables such as load, thickness of sulphurized layer, surface roughness, and surface hardness on the friction coefficient has been analyzed.The results showed that the thickness of sulphurized layer could be somewhat thin at without sacrifice of the friction reduction performance.
Sensitivity Analysis for Systems with Coprime Factor Perturbations

Gao Zhiwei,<br>,王先来,李光泉
系统工程理论与实践 , 1997,
Abstract: 讨论了互质因子摄动系统的鲁棒稳定性和性能敏感性问题,给出了互质因子摄动系统鲁棒稳定的一个充分条件,并得到了用H∞范数测量的系统敏感函数矩阵和闭环传递函数矩阵的上限。
The Safety Management of Web Site ASP

ChenMin GaoHuawei,<br>陈敏,
现代图书情报技术 , 2002,
Abstract: ASP technology is one kind of new technology developing the dynamic Web site at present, and extensive used in the development of various specialization Web sites. How of manage ASP's application procedure in order to avoid suffering attacking and destroys is an important question the people must faced with. How the Web site of use ASP's technology carries on the various limits of authority to manage, and how to adopt the safe various safe leak of measure jam, and eliminates the technology method of safe hidden trouble has been expounded by this article.
Identification of Structure VAR Models Using Conditional Mutual Information Graphs

GAO Wei,TIAN Zheng,<br> ,田 铮
系统工程理论与实践 , 2007,
Abstract: A class graphical models,called linear conditional mutual information graph,is proposed for identification structural vector autoregression model.The vertex set denotes random variables at different times,and the directed edges denote causal dependence between the variables.The presence of the edges is tested by a statistics based on linear conditional mutual information.The permutation procedure is used to determine the significance of the test statistics.The direction of the relationships of the current variables is determined by a statistical method and lead to directed acyclic graph.The method is demonstrated by simulation time series with different dependence structures and error distribution.
Situation and countermeasure of alien invasive plants in Northeast China

GAO Yan,CAO Wei,<br>,
中国科学院研究生院学报 , 2010,
Abstract: The 66 alien invasive plants of 18 families were identified and recorded in Northeast China based on the field investigation and related literature. We desribe the species composition, origin, invasive ways, habitat, and distribution of the invasive plants in Northeast China and analyze the influence and harmfulness of the invasive plants. Some countermeasures and suggestions are presented.
Further Research on Fixed Modes in Singular Decentralized Feedforward Control Systems

Gao Zhiwei,Li Guangquan,<br>,李光泉
自动化学报 , 1996,
Abstract: By means of the conversion of a generalized singular decentralized feedforward control systems into a singular decentralized control systems without forward feed, the problems of fixed modes in singular decentralized feedforward control systems are further studied. Some new criteria based on the original system coefficient matrices to determine finite fixed modes and impulsive fixed modes are given. Some significant conclusion are also proposed.

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