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H∞ control of a class of nonlinear Hamiltonian descriptor systems

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science china({2. sciences) 2010年第11期53卷 2195-2204页

作者： SUN LiYing1,2.& WANG YuZhen1 1school of Control science and {2., shandong university, jinan 2.0061, china 2.0} of science, university of jinan, jinan 2.002., china school of Control science and {2. Shandong University school of science University of Jinan

This paper studies the stabilization and H∞ control of a class of nonlinear Hamiltonian descriptor systems. Firstly, based on the structural characteristic of the nonlinear Hamiltonian descriptor system, an equivalent nonlinear dissipative Hamiltonian differential-algebraic system is obtained by using restricted system equivalent theory. With the dissipative form, the stabilization problem is then discussed for the nonlinear Hamiltonian descriptor systems, and an H∞ controller is designed. Finally, simulations on a nonlinear circuit system are given.

关键词： nonlinear Hamiltonian descriptor systems stabilization H∞ control

Residents’ Willingness to Pay for Improving Air Quality in jinan, china

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Chinese Journal of Population,Resources and Environment 2007年第2期5卷 12-19页

作者： Wang Yan, Zhang Yisheng, Wang Qian, Wang Wei school of Environmental science and {2., shandong university, jinan shandong 250100, china school of Environmental science and {2. Shandong University

Along with the progress of urbanization and environ- mental deterioration, residents’ desire for improved air quality is increasing. In order to quantify an individual’s willingness-to-pay (WTP) for improved air quality in jinan of eastern china, a contingent valuation method (CVM) was employed. A sample of 1,500 residents was chosen on the basis of multistage sampling methods with face-to-face interviews by using a series of hypo-thetical, open-ended scenario questions which were designed to elicit the respondents’ WTP. Results showed that 59.7% of respondents were able to express their WTP and the mean WTP is 100 Chinese Yuan (CNY) per person per year. A probit model on the probability of a positive WTP and a regression model were developed to find the relationship between endogenous variables and WTP. Most parameters in the econometric analysis had the expected sign. Annual household income and expenditure on treating respiratory diseases significantly influence WTP. The rates of positive WTP and the monetary amount are larger for men than for women. Results also showed that people who lived in more polluted areas were willing to pay more for clean air. Unlike developed countries, clean air may only be considered as a public good in china in that more than 40% of respondents had no incen- tive to bear the costs of attempting to achieve better air quality, which indicates the relatively low environmental consciousness.

关键词： air quality willingness to pay contingent valuation method jinan

A new approach to adaptive control design without overparametrization for a class of uncertain nonlinear systems

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science china({2. sciences) 2011年第7期54卷 1419-1429页

作者： ZHANG Jian & LIU YunGang school of Control science and {2.,shandong university,jinan 2.0061,china school of Control science and {2. Shandong University

This paper considers the globally stabilizing adaptive controller design for a class of more general uncertain high-order nonlinear systems with unknown control *** the existing literature has solved the problem,for n-dimensional systems,the existing methods need at least n + 1 dynamic updating laws for the unknown parameters to construct the stabilizing adaptive controller;that is,the dimension of the dynamic compensator is not less than n + 1,and therefore,there exists serious *** this paper,by defining some new unknown parameters which need dynamic updating,also by using adding a power integrator and related adaptive technique,the overparametrization is successfully solved and a new approach is given to design stabilizing adaptive controller based on only one parameter updating law.A simulation example is finally provided to demonstrate the validness of the proposed approach.

关键词： high-order nonlinear systems unknown control coefficients overparametrization stabilizing con- trol design adding a power integrator adaptive technique

Analysis of the carbon source for diamond crystal growth

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Chinese science Bulletin 2008年第6期53卷 937-942页

作者： LI Li1,2. XU Bin2.3 & LI MuSen1,2.1 school of Materials science & {2., shandong university, jinan 2.0061, china 2.shandong {2. Research Center for Super Hard Materials, Zoucheng 2.3500, china 3 school of Materials science & {2., shandong Jianzhu university, jinan 2.0101, china school of Materials science & {2. Shandong University Jinan 250061 China shandong engineering Research Center for Super Hard Materials Zoucheng 273500 China school of Materials science & {2. Shandong Jianzhu University Jinan 250101 China

The lattice constants of diamond and graphite at high pressure and high temperature (HPHT) were calculated on the basis of linear expansion coefficient and elastic constant. According to the empirical electron theory of solids and molecules (EET), the valence electron structures (VESs) of diamond, graphite crystal and their common planes were calculated. The relationship between diamond and graphite structure was analyzed based on the boundary condition of the improved Thomas-Fermi-Dirac theory by Cheng (TFDC). It was found that the electron densities of common planes in graphite were not continuous with those of planes in diamond at the first order of approximation. The results show that during the course of diamond single crystal growth at HPHT with metal catalyst, the carbon sources forming diamond structure do not come from the graphite structure directly. The diamond growth mechanism was discussed from the viewpoint of valence electron structure.

关键词：钻石晶体生长石墨碳源价电子结构

Global practical tracking by output-feedback for nonlinear systems with unknown growth rate

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science china({2. sciences) 2011年第10期54卷 2079-2090页

作者： YAN XueHua & LIU YunGang school of Control science and {2.,shandong university,jinan 2.0061,china school of Control science and {2. Shandong University

This paper is devoted to the global practical tracking by output-feedback for a class of uncertain nonlinear systems with only the tracking error *** from the closely related works,the systems have unmeasured states dependent growth with unknown constant rate,and the reference signal,as well as its first order derivative,has unknown *** because of these,the tracking problem can hardly be solved by straightforwardly extending the existing *** the paper,motivated by the related stabilization results,and flexibly using the ideas of universal control and dead zone,an adaptive output-feedback controller is designed to make the tracking error prescribed arbitrarily small after a finite time while keeping all the states of the closed-loop system bounded.A numerical example demonstrates the effectiveness of the theoretical results.

关键词： uncertain nonlinear systems global practical tracking adaptive control output-feedback dynamic high-gain

Series-based approximate approach of optimal tracking control for nonlinear systems with time-delay

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Progress in Natural science:Materials International 2008年第12期18卷 1571-1576页

作者： Gongyou Tang~a Mingqu Fan~(a,b) a College of information science and {2.,Ocean university of china,Qingdao 2.6100,china b College of information and {2.,shandong university of science and Technology,jinan 2.0031,china College of information science and {2. Ocean University of China Qingdao 266100 China College of information and engineering Shandong University of Science and Technology Jinan 250031 China

The optimal output tracking control (OTC) problem for nonlinear systems with time-delay is *** a series-based approx- imate approach,the original OTC problem is transformed into iteration solving linear two-point boundary value problems without time- *** OTC law obtained consists of analytical linear feedback and feedforward terms and a nonlinear compensation term with an infinite series of the adjoint *** truncating a finite sum of the adjoint vector series,an approximate optimal tracking control law is obtained.A reduced-order reference input observer is constructed to make the feedforward term physically *** exam- ples are used to test the validity of the series-based approximate approach.

关键词： Nonlinear systems Time-delay Tracking control Optimal control Observer

Numerical Simulation for FWM Power Evaluation in Optical Fiber Transmission Systems

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光学学报 2003年第S1期23卷 41-42页

作者： Yan Liu Kang Li Fanmin Kong school of information {2. and engineering, shandong university, jinan 250100, P. R. china school of information {2. and engineering Shandong University Jinan 250100 P. R. China

In order to realize reliable and fast simulation of FWM power evaluation, USSD (Uniform Step-Size Distribution) method is modified and its corresponding simulation results of FWM efficiency and computational time are ... 详细信息

关键词： Simulation be FWM Numerical Simulation for FWM Power Evaluation in Optical Fiber Transmission Systems for in

Pair-wise error probability and its Chernoff upper bound for unitary space-time code

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science china({2. sciences) 2010年第8期53卷 1613-1621页

作者： ZHANG DaPeng 1,2., LIU Ju 1 , XU HongJi 1 & JI Hui 1 1 school of information {2. and engineering, shandong university, jinan 250100, china 2.State Key Laboratory of Integrated Services Networks, Xidian university, Xi’an 710071, china school of information {2. and engineering Shandong University State Key Laboratory of Integrated Services Networks Xidian University

Unitary space-time code is ideally suited for rapid fading scenarios as it can operate well without channel state information (CSI), which is of vital significance for improving the effectivity and reliability of wireless communication systems. Pair-wise error probability (PEP) is an important factor for studying the reliability of a communication system. However, the existing scheme only gives the final result of PEP and the corresponding Chernoff upper bound (CUB) is obtained through magnification, which is not of universal significance for this kind of problems. In this paper, we employ the log-likelihood ratio of probability density functions of the received signals conditioned on the two possibly transmitted signals and by virtue of moment generating function we give the details in deriving the final precise residue expression for PEP and its CUB. At last, we verify the above results by simulations.

关键词： multiple-input multiple-output space-time code unitary space-time code pair-wise error probability Chernoff upper bound

STATE-FEEDBACK ADAPTIVE STABILIZING CONTROL DESIGN FOR A CLASS OF HIGH-ORDER NONLINEAR SYSTEMS WITH UNKNOWN CONTROL COEFFICIENTS

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Journal of Systems science & Complexity 2007年第3期20卷 350-361页

作者： Zongyao SUN Yungang LIU school of Control science and {2. Shandong University Jinan 250061 China.

In this paper, a new approach is successfully addressed to design the state-feedback adaptive stabilizing control law for a class of high-order nonlinear systems in triangular form and with unknown and nonidentical control coefficients, whose stabilizing control has been investigated recently under the knowledge that the lower bounds of the control coefficients are exactly known. In the present paper, without any knowledge of the lower bounds of the control coefficients, based on the adaptive technique and appropriately choosing design parameters, we give the recursive design procedure of the stabilizing control law by utilizing the approach of adding a power integrator together with tuning functions. The state-feedback adaptive control law designed not only preserves the equilibrium at the origin, but also guarantees the global asymptotic stability of the closed-loop states and the uniform boundedness of all the other closed-loop signals.

关键词： Adaptive stabilizing control adding a power integrator high-order nonlinear systems,state-feedback unknown control coefficients.