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A New Application of Multi-Body System Dynamics in Vehicle-Road Interaction Simulation

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wuhan university Journal of Natural Sciences 2003年第2A期8卷 379-382页

作者： Ren Wei-qun, Zhang Yun-qing, Jin Guo-dongCAD Center, huazhong university of Science and technology, wuhan 430074, hubei, china huazhong university of Science and technology CAD Center Wuhan Hubei China (GRID:grid.33199.31) (ISNI:***)

In vehicle-road interaction simulation, multibody system (MBS) dynamics as well as the corresponding software ADAMS has been employed to model the nonlinear vehicle in more detail. The simulation method has been validated by the test data, and been compared to the former simple models. This method can be used for estimating the effects of dynamic tire forces and other vehicle features on road damage so that the “road-friendliness” can be assessed in vehicle design process.

关键词： MBS dynamics vehicle modeling ADAMS

PROFILE TOLERANCE EVALUATION OF PARAMETRIC CURVES AND SURFACES

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Chinese Journal of Mechanical Engineering 2002年第2期15卷 121-125页

作者： Huang Xiaoping Xiong Youlunschool of Mechanical Science and Engineering, huazhong university of Science and technology,wuhan 430074, china school of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China ***

The profile error evaluation of complex curves and surfaces expressed inparametric form is considered. The linear error model is established on the base of two hypothesesfirstly. Then the profile error evaluation is converted into one of these optimal formulations:MINIMAX, MAXMIN and MINIDEX problems, which are easier to be solved than the initial form. To eachone of them, geometric condition and algebraic condition are presented to arbitrate whether theideal element reaches to the optimal position. Exchange algorithm is proven highly effective insearching for solutions to these optimization problems. At last some key problems in tolerance offreeform surfaces and curves in B spline method are discussed.

关键词： Parametric form Profile tolerance Linear error model Exchangealgorithm

Synthesized Optimization of Triangular Mesh

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武汉理工大学学报 2006年第S3期28卷 796-799页

作者： HU Wenqiang YANG Wenyu school of software Engineering,huazhong university of Science and technology,wuhan 430074,china. school of software Engineering Huazhong University of Science and TechnologyWuhan 430074China

Triangular mesh is often used to describe geometric object as computed model in digital manufacture,thus the mesh model with both uniform triangular shape and excellent geometric shape is *** in fact,the optimization of triangu- lar shape often is contrary with that of geometric *** this paper,one synthesized optimizing algorithm is presented through subdividing triangles to achieve the trade-off solution between the geometric and triangular shape optimization of mesh *** result mesh with uniform triangular shape and excellent topology are obtained.

关键词： mesh optimization subdivision algorithm synthesized optimization

A MODEL FOR CONCRETE DURABILITY DEGRADATION IN FREEZE-THAWING CYCLES

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Acta Mechanica Solida Sinica 2003年第4期16卷 353-358页

作者： Wei Jtm Wu Xinghao Zhao Xiaolong (school of Civil Engineering and Mechanics,huazhong university of Science and technology,wuhan 430074,china) Sch. of Civ. Eng. and Mechanics Huazhong Univ. of Sci./Technology Wuhan 430074 China

Up to now,how to control the durability of concrete structures is still a pending research topic in civil *** to the fact that concrete durability can be affected by many non-mechanical factors,it is very difficult to research durability only based on mechanics. However,the phenomenon of failure caused by non-mechanical factors is similar to that caused by *** frost durability reflects the comprehensive durability of concrete in a certain sense, the specific failure process is analyzed and a damage model is introduced,which can describe the durability degradation process of concrete in the whole freeze-thawing cycle.

关键词： concrete durability damage frost durability

Optimality strategy of a sealed-offer simultaneous bargaining protocol

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Science china(Information Sciences) 2011年第1期54卷 79-90页

作者： ZHANG LinLan1,2,CHEN XueGuang2 & HONG Liu2 1school of Business,hubei university,wuhan 430062,china 2Institute of Systems Engineering,huazhong university of Science and technology,wuhan 430074,china 1. school of Business Hubei University Wuhan 430062 China2. Institute of Systems Engineering Huazhong University of Science and Technology Wuhan 430074 China

Alternating-offer bargaining protocol is the most predominant way for solving bilateral bargaining ***,alternating-offer may consume much time and cause a low effciency in some ***, a deadlock in which both negotiators are unwilling to concede or refuse to disclose more information may arise. Then mediation is *** paper presents an agent-based sealed-offer simultaneous bargaining protocol by introducing a nonbiased *** information of both agents is considered completely *** our agent-based model,both agents simultaneously submit their respective offers to the mediate *** offers of each agent are not revealed to the *** design can discourage counter-speculation and effectively control fraud and misrepresentation in a certain ***,we analyze how an agent can exploit the available information in selecting a strategy that maximizes its expected utility and give the optimal offers of each agent at each stage of the *** groups of automated experiments are conducted to evaluate the performance of the proposed automated negotiation procedure.

关键词： automated negotiation bargaining sealed-bid optimal strategy

Real-time Non-linear Target Tracking Control of Wheeled Mobile Robots

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武汉理工大学学报 2006年第S3期28卷 861-866页

作者： YU Wenyong school of Mechanical Engineering,huazhong university of Science & technology,wuhan 430074,china, school of Mechanical Engineering Huazhong University of Science & TechnologyWuhan 430074China

A control strategy for real-time target tracking for wheeled mobile robots is *** a modified Kalman filter for environment perception,a novel tracking control law derived from Lyapunov stability theory is *** of linear velocity and angular velocity with mechanical constraints is *** proposed control system can simultaneously solve the target trajectory prediction,real-time tracking,and posture regulation problems of a wheeled mobile *** results illustrate the effectiveness of the proposed tracking control laws.

关键词： wheeled mobile robots motion control dynamic tracking

Empirical study on entropy models of cellular manufacturing systems

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Progress in Natural Science:Materials International 2009年第3期19卷 389-395页

作者： Zhifeng Zhang a,b,*, Renbin Xiao a a CAD Center, huazhong university of Science and technology, wuhan 430074, china b Economics and Management school of Nanchang, Hangkong university, Nanchang 330063, china [a]CAD Center Huazhong University of Science and Technology Wuhan 430074 China [b]Economics and Management School of Nanchang Hangkong University Nanchang 330063 China

From the theoretical point of view, the states of manufacturing resources can be monitored and assessed through the amount of infor- mation needed to describe their technological structure and operational state. The amount of information needed to describe cellular manufacturing systems is investigated by two measures: the structural entropy and the operational entropy. Based on the Shannon entropy, the models of the structural entropy and the operational entropy of cellular manufacturing systems are developed, and the cog- nizance of the states of manufacturing resources is also illustrated. Scheduling is introduced to measure the entropy models of cellular manufacturing systems, and the feasible concepts of maximum schedule horizon and schedule adherence are advanced to quantitatively evaluate the effectiveness of schedules. Finally, an example is used to demonstrate the validity of the proposed methodology.

关键词： Cellular manufacturing systems Structural entropy Operational entropy Scheduling

Attraction and Stability for Neutral Stochastic Functional Differential Equations

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wuhan university Journal of Natural Sciences 2009年第3期14卷 205-209页

作者： CEN Liqun, DAI Weixing, HU Shigeng school of Mathematics and Statistics, huazhong university of Science and technology, wuhan 430074, hubei, china school of Mathematics and Statistics Huazhong University of Science and Technology Wuhan Hubei 430074 China

The main aim of this paper is to establish several new criteria on the attractor for the solutions of neutral stochastic func- tional differential equations. A kind of ψ-function is introduced to our discussion, and some results on the attractor for the product of the ψ-function and the solutions are obtained. As a byproduct, a number of new criteria on asymptotic stability are also shown.

关键词： Lyapunov's method attractor semimartingale convergence theorem Ito's formula

A novel 2×2 wavelength selective cross-connect based on Mach-Zehnder interferometer

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Optoelectronics Letters 2008年第1期4卷 15-18页

作者： FENG Yong-hua,LUO Feng-guang, and YUAN Jing school of Optoelectronic Science and technology, huazhong university of Science and technology, wuhan, 430074, china school of Optoelectronic Science and technology Huazhong University of Science and Technology Wuhan China

A novel 2×2 wavelength selective cross-connect (WSXC) module, which is composed of a Bragg-grating-based Mach- Zehnder interferometer (MZI), a pair of optical waveguides, a pair of 1×2 optical switches (OSWs) and a pair of Y-model combiners is proposed. The mathematical description of the proposed 2×2 WSXC module is given and explained. Multi- channel multi-wavelength selective cross-connect can be fabricated with the proposed 2×2 WSXC module, together with multistage interconnection networks (MINs). A four-wavelength 4×4 WSXC is demonstrated by simulation to validate the flexibility of the proposed WSXC.

关键词：波长选择正交连接 Mach-Zehnder干涉计布拉格光栅光学转换