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Fuzzy Scheduling of Coupled Customers toa Queueing Network with Parallel Servers

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Systems Science and Systems engineering 1998年第4期8卷 482-487页

作者： ZHU Xiaomin(Department of Economics college of Economics and AdministratinNorthern jiaotong {2. Beijing 100044, china)ZHANG Runtong(Institute of information Systems college of Economics and AdministrationNorthern jiaotong {2. Beijing 100044,

In this paper we consider a queueing network consisting of two parallel servers and threearrival streams generated by independent Poisson sources. Each server has its own queue and receivescustomers from its own arrival stream. A third arrival stream consists of customers which place resourcedemands on both servers, which are handled separately by each server once the request is made. Eachservice time is independent and exponentially distributed. Each customer in the system pays a holdingcost per unit time. The objective is to dynamically determine the optimal scheduling policy to the thirdstream of conupled customers. based on the state of the system, so as to minimize the average cost. Thismodel is new, and has Policy implications for computer or communication networks. A fuzzy approachis presented to solve this problem. Simulation shows that the approach is efficient and promising.

关键词： Fuzzy Scheduling of Coupled Customers toa Queueing Network with Parallel Servers

Observer-Based Containment Control of Multi-Agent System with Linear Dynamics

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Observer-Based Containment Control of Multi-Agent System wit...

基于前置维纳滤波的多用户MIMO系统下行链路线性预编码方法

第2.届中国控制与决策会议

作者： Zonggang Li 1,2., Guangming Xie 2., Pu Gao 1 1. School of Mechatronic engineering, lanzhou {2. university, lanzhou, 730070, china, 2. Center for Systems and Control, State Key Laboratory of Turbulance and Complex Systems, college of engineering, Peking university, Beijing, 100871, china

This paper considers the containment control of linear multiagent system with weakly connected information topology. By defining the node-induced strongly connected subgraph as strong component, the agents contained in strong components with zero in-degree are called leaders and the others are called followers. Then, a sufficient and necessary condition is proposed for all agents to achieve containment by employing an observer-based protocol, where all followers finally converge to the convex hull formed by leaders and each strong component of leaders asymptotically achieve consensus. Since the number of leader agents in each strong component are always larger than one, the proposed scheme is more robust for the malfunction of leaders. Further, two LMIs are given to design the observer-based protocol. Numerical examples are included to illustrate the validity of the proposed results.

关键词： Multi-agent system Observer-based Containment Control Consensus.

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上海交通大学学报 2009年第7期43卷 1117-1120,1124页

作者：李旭何迪上海交通大学电子信息与电气工程学院上海200240

针对多用户多输入多输出(MIMO)下行链路中,用户接收机设计复杂度高且不易实现的问题,提出一种改进方案.利用维纳滤波的预处理方法,在发送端对发送数据进行预处理,把各用户接收机的计算任务集中于发送端,各移动用户接收机不需要预先得到... 详细信息

针对多用户多输入多输出(MIMO)下行链路中,用户接收机设计复杂度高且不易实现的问题,提出一种改进方案.利用维纳滤波的预处理方法,在发送端对发送数据进行预处理,把各用户接收机的计算任务集中于发送端,各移动用户接收机不需要预先得到其他用户的信道信息,降低了用户接收机的复杂度,有利于提高用户终端设备的高效节能和便携等特性.仿真结果表明,与现有方法相比,本文方法能有效改善系统的误码性能,并获得更大的信噪比增益.

关键词：多用户多输入多输出预编码维纳滤波

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组合导航智能信息融合自适应滤波算法分析

系统工程与电子技术 2004年第10期26卷 1449-1452,1459页

作者：卞鸿巍金志华田蔚风上海交通大学信息检测技术与仪器系

针对当前自适应组合导航系统算法的研究趋势,总结了卡尔曼滤波技术的缺陷和利用智能融合技术提高滤波器性能的设计思想。对模糊控制自适应算法(FIR AKF)、神经网络自适应算法(NN AKF)和自适应神经网络模糊推理自适应算法(ANFIS AKF)进... 详细信息

针对当前自适应组合导航系统算法的研究趋势,总结了卡尔曼滤波技术的缺陷和利用智能融合技术提高滤波器性能的设计思想。对模糊控制自适应算法(FIR AKF)、神经网络自适应算法(NN AKF)和自适应神经网络模糊推理自适应算法(ANFIS AKF)进行了分析。着重研究FIR AKF采用滤波器新息序列和外系统状态的模糊控制器关键的模糊规则设计问题;分析NN AKF在组合导航系统模型调整、故障检测和隔离中的应用方法,并给出ANFIS AKF利用神经网络自动生成推理规则和建立自适应组合导航系统的基本方法。

关键词：组合导航自适应卡尔曼滤波神经网络模糊控制自适应神经网络模糊推理

DRAG REDUCTION EFFECT OF COUPLING FLEXIBLE TUBES WITH TURBULENT FLOW

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Journal of Hydrodynamics 2008年第1期20卷 96-100页

作者： CAI Shu-peng JIN Guo-yu LI Da-mei Yang Lin Institute of High Pressure Water Jet Hunan University of Technology Zhuzhou 421008 China State Key Laboratory of Water Resources and Hydropower engineering Science Wuhan University Wuhan430072 China college of Mechanical and electrical {2. Chongqing Jiaotong University Chongqing 400074 China

To analyze the mechanism of drag reducing effect by coupling flexible tubes with turbulent flow, based on experimental examination of more obvious turbulent drag reduction effect in flexible tubes than in rigid tubes, experimental investigation was performed on the effect of turbulent drag reduction, fluctuating vibration characteristics of flexible tube and the correlations by using a double-tube system and laser displacement sensor. The results are as follows： with the decrease of the thickness of the flexible tubes, the root mean square of fluctuating amplitude of the outer wall of the tubes increases, and the non-dimensional burst period increases, resulting in the increase of the reduction rate of drag coefficient by coupling flexible tubes with turbulent flow. At applied pressure-balanced air on the outer wall and the Reynolds number of about 1.75×10^4, the non-dimensional burst periods of the flexible tubes with the thickness of 2.mm, 3 mm, 4 mm are 141, 12., 105, respectively.

关键词： flexible tubes fluctuating displacement turbulent drag reduction burst period

基于非线性滤波和平滑相迭代的GPS定位估计算法

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上海交通大学学报 2009年第7期43卷 1108-1112页

作者：曹意茅旭初上海交通大学电子信息与电气工程学院上海200240

针对目前全球定位系统(GPS)单机定位精度较低的问题,提出一种新的定位估计算法.每一时刻点先用平淡卡尔曼滤波进行位置估计;然后,利用滤波结果对前一时刻点的位置估计进行平滑修正;接着,再用修正值进行滤波,得到当前时刻点更新的估计值... 详细信息

针对目前全球定位系统(GPS)单机定位精度较低的问题,提出一种新的定位估计算法.每一时刻点先用平淡卡尔曼滤波进行位置估计;然后,利用滤波结果对前一时刻点的位置估计进行平滑修正;接着,再用修正值进行滤波,得到当前时刻点更新的估计值,通过若干次迭代,得到最终估计值.后向平滑算法分别采用固定区间平滑和固定滞后平滑,前者适用于非线性系统模型,后者在平滑步长增大时,其计算量较小.实验结果表明,迭代算法能够有效提高定位精度,不仅可以应用于后验数据处理中,也可以应用于GPS实时定位估计.

关键词：全球定位系统最优平滑平淡卡尔曼滤波迭代算法

Research of the Digital Communication System for CBTC Based on 802.11

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Research of the Digital Communication System for CBTC Based ...

Study on Design of Magnetic Flux Leakage Testing Instrument for gun

第三届多媒体信息网络与安全国际会议

作者： Yun Wei 1 School of Automation and electrical engineering {2. jiaotong university {2. china Huaiwei Lu 2.School of Mathematics Physics and Software engineering {2. jiaotong university {2. china Zhaohui He 3 GanSu Provincial Division of china Telecom Group Co. {2. china

The communication based train control （CBTC） system is an advanced train control system .It uses high accuracy of train locating, realizes a continuous automatic train control system .DCS system plays an important role in the information interaction between ground equipment and vehicle equipment in CBTC. Based on OPNET simulation console, this paper designs a DCS network, simulates its communication process , analyzes the simulation data of sending and receiving, evaluates the entire performance of the network, which can offer reference to designing and optimizing the DCS network.

关键词： 802.11 CBTC system DCS Handoff

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微计算机信息 2005年第6期 115-116+82页

作者： Wang,Changlong Fu,Junmei(Institute of Electronic and information, Xi’an jiaotong {2.)Yingwei Xu,Zhangsui(Ordnance engineering college, Shijiazhuang 050003, china)Wang,Changlong Jin,

The paper describes the magnetic Dipole model of magnetic flux leakage(MFL) based on the principle of MFL testing, proposes the effects of surface defect width and depth on MFL field, and presents the peak-peak amplitude algorithm that the features of defect signal are extracted. The peak-peak amplitude and separation, signal gradient variation are used as the distinguish criterions of defects. The principle of instrumental hardware design is also introduced. The introduced gun MFL testing instrument is successfully employed in the nondestructive evaluation of gun.

关键词： magnetic flux leakage defect nondestructive evaluation peak-peak amplitude algorithm hardware design

Dynamical Behavior of V^2. Control Boost Converter

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Journal of Southwest jiaotong university(English Edition) 2010年第1期18卷 32-38页

作者：包伯成许建平 School of electrical and information {2. Jiangsu Teachers University of Technology School of electrical engineering Southwest Jiaotong University

A discrete iterative map model of V^2. control boost converter was established to study the dynamical behaviors of the converter. By using parameter space map and bifurcation diagram, the effects of circuit parameters on the bifurcation behaviors of V^2. control and current-mode control boost converters were analyzed. The phase portraits and time-domain waveforms of the V^2. control boost converter were obtained by Runge-Kutta algorithm through piecewise smooth switching model. The research results indicate that V^2. control boost converters can evolve into periodic and chaotic behaviors, and show weaker nonlinear behaviors than current-mode control boost converters.

关键词： Bifurcation Chaos Discrete iterative map Parameter space V^2. control boost converter