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A novel mixed-synchronization phenomenon in coupled Chua's circuits via non-fragile linear control

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Chinese Physics B 2011年第8期20卷 113-119页

作者：王军威马庆华曾丽 cisco School of Informatics Guangdong University of Foreign Studies

Dynamical variables of coupled nonlinear oscillators can exhibit different synchronization patterns depending on the designed coupling scheme. In this paper, a non-fragile linear feedback control strategy with multiplicative controller gain uncertainties is proposed for realizing the mixed-synchronization of Chua＇s circuits connected in a drive-response configuration. In particular, in the mixed-synchronization regime, different state variables of the response system can evolve into complete synchronization, anti-synchronization and even amplitude death simultaneously with the drive variables for an appropriate choice of scaling matrix. Using Lyapunov stability theory, we derive some sufficient criteria for achieving global mixed-synchronization. It is shown that the desired non-fragile state feedback controller can be constructed by solving a set of linear matrix inequalities （LMIs）. Numerical simulations are also provided to demonstrate the effectiveness of the proposed control approach.

关键词： mix-synchronization Chua's circuit non-fragile control Lyapunov stability linear ma-trix inequality

Application of biomonitoring and support vector machine in water quality assessment

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2012年第4期13卷 327-334页

作者： Yue LIAO Jian-yu XU Zhu-wei WANG Institute of Information Science and Technology Ningbo UniversityNingbo 315211China cisco systems(China)Research and Development Company Limited Hangzhou 310012China

The behavior of schools of zebrafish （Danio rerio） was studied in acute toxicity environments. Behavioral features were extracted and a method for water quality assessment using support vector machine （SVM） was de- veloped. The behavioral parameters of fish were recorded and analyzed during one hour in an environment of a 24-h half-lethal concentration （LC50） of a pollutant. The data were used to develop a method to evaluate water quality, so as 6＋ 2＋ to give an early indication of toxicity. Four kinds of metal ions （Cu2~, Hg2~, Cr , and Cd ） were used for toxicity testing. To enhance the efficiency and accuracy of assessment, a method combining SVM and a genetic algorithm （GA） was used. The results showed that the average prediction accuracy of the method was over 80% and the time cost was acceptable. The method gave satisfactory results for a variety of metal pollutants, demonstrating that this is an effective approach to the classification of water quality.

关键词： Water assessment Behavioral feature parameter Support vector machine (SVM) Genetic algorithm (GA) Water quality classification

塑封硅器件中介电薄膜的温湿效应分析(英文)

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实验力学 2007年第3期22卷 285-294页

作者：李力 cisco systems Inc.

随着铜互连以及low-k电介质在超大规模集成电路中地广泛使用,low-k电介质的机械完整性及其对互连可靠性变得更加重要。影响介电膜的机械完整性和互连可靠性的因素包括介电膜的工艺制程,芯片与封装材料的相互影响,以及环境温度和湿度的... 详细信息

随着铜互连以及low-k电介质在超大规模集成电路中地广泛使用,low-k电介质的机械完整性及其对互连可靠性变得更加重要。影响介电膜的机械完整性和互连可靠性的因素包括介电膜的工艺制程,芯片与封装材料的相互影响,以及环境温度和湿度的影响。本文研究集中于了解环境温度和湿度对塑封硅器件中介电薄膜的可靠性影响。采用快速温度和湿度实验条件,对塑封硅器件中介电薄膜受水分和温度损伤的敏感性进行了分析。运用商业有限元(FEA)分析软件,对水分在塑封材料和硅器件中的扩散过程进行了建模及仔细分析。并对硅器件周边密封圈的防水分扩散效力进行了研究。通过这一系列实验与分析,对塑封硅器件中介电薄膜的温湿效应有了完整地了解,并提出和建立了相关的物理模型和经验公式。运用这物理模型和经验公式可对在各种使用环境温度和湿度条件下,塑封硅器件中介电薄膜的可靠性进行评估及分析。

关键词：铜互连 low—k电介质微电子封装技术温湿效应可靠性

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光学方法在微电子封装中的应用(英文)

实验力学 2007年第3期22卷 236-248页

作者：李力 cisco systems Inc.

热应力分析在微电子封装的设计和制造中是非常重要的一环。影响微电子封装可靠性的因素包括封装结构中的温度分布、热致变形和关键界面上的层间粘结强度。在微电子封装热应力分析和可靠性评估中,实验力学起着重要的作用。凭借其内在的... 详细信息

热应力分析在微电子封装的设计和制造中是非常重要的一环。影响微电子封装可靠性的因素包括封装结构中的温度分布、热致变形和关键界面上的层间粘结强度。在微电子封装热应力分析和可靠性评估中,实验力学起着重要的作用。凭借其内在的并行处理能力,实验力学中的光学方法可以提供现场的、具有各种敏感度和解析度的全场位移测量,因而它也被广泛地用于微电子封装领域。本文讨论了光学方法在微电子封装热应力分析中的应用,并举实例来说明光学方法是如何地被用于微电子封装技术的研发以及考核验收。

关键词：微电子封装光学方法云纹干涉阴影云纹显微热成像

Load balance in hierarchical routing network

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The Journal of China Universities of Posts and Telecommunications 2009年第6期16卷 72-77页

作者： HUA Yi-qiang LIU Ai-bo LU Yue-ming LI Hui JI Yue-feng Key Laboratory of Information Photonics and Optical Communications Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China cisco systems Inc. China Beijing 100022 China

In this article,the problem of load balance in hierarchical routing network is *** conventional shortest path first（SPF） algorithm over aggregated topology in hierarchical routing network may result in worse routing performance,a traffic sharing path selection algorithm and a variable weight scheme are put forward for hierarchical routing network,which can equilibrate the utilities of link resources and reduce the blocking probability of connections with the improvement on *** are conducted to evaluate proposed variable weight and traffics balance（VWTB） algorithm,which combines traffic sharing and variable *** the simulation results,it can be found that the proposed VWTB algorithm can balance the traffics and equilibrate the utilities of link resources significantly.

关键词： hierarchical routing load balance variable weight traffic sharing

Design and Performance Evaluation of Sequence Partition Algorithms

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Journal of Computer Science & Technology 2008年第5期23卷 711-718页

作者：杨兵陈菁吕恩月郑斯清 cisco systems 2200 East President George Bush Highway Telecom. Engineering Program University of Texas at Dallas Department of Mathematics and Computer Science Salisbury University Department of Computer Science University of Texas at Dallas

Tradeoffs between time complexities and solution optimalities are important when selecting algorithms for an NP-hard problem in different applications. Also, the distinction between theoretical upper bound and actual solution optimality for realistic instances of an NP-hard problem is a factor in selecting algorithms in practice. We consider the problem of partitioning a sequence of n distinct numbers into minimum number of monotone （increasing or decreasing） subsequences. This problem is NP-hard and the number of monotone subsequences can reach [√2n＋1/1-1/2]in the worst case. We introduce a new algorithm, the modified version of the Yehuda-Fogel algorithm, that computes a solution of no more than [√2n＋1/1-1/2]monotone subsequences in O（n^1.5） time. Then we perform a comparative experimental study on three algorithms, a known approximation algorithm of approximation ratio 1.71 and time complexity O（n^3）, a known greedy algorithm of time complexity O（n^1.5 log n）, and our new modified Yehuda-Fogel algorithm. Our results show that the solutions computed by the greedy algorithm and the modified Yehuda-Fogel algorithm are close to that computed by the approximation algorithm even though the theoretical worst-case error bounds of these two algorithms are not proved to be within a constant time of the optimal solution. Our study indicates that for practical use the greedy algorithm and the modified Yehuda-Fogel algorithm can be good choices if the running time is a major concern.

关键词： monotone subsequence permutation algorithm NP-complete approximation complexity

An Early Warning System for Curved Road Based on OV7670 Image Acquisition and STM32

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Computers, Materials & Continua 2019年第4期59卷 135-147页

作者： Xiaoliang Wang Wenhua Song Bowei Zhang Brandon Mausler Frank Jiang School of computer science and engineering Hunan University of Science and TechnologyXiangtan411201China cisco systems Incorporated San Jose 95134CaliforniaUSA School of IT Deakin UniversityVictoria 3216Australia

Nowadays,the number of vehicles in China has increased *** increase of the number of vehicles has also led to the increasingly complex traffic situation and the urgent safety measures in ***,the existing early warning devices such as geomagnetic,ultrasonic and infrared detection have some shortcomings like difficult installation and *** addition,geomagnetic detection will damage the road surface,while ultrasonic and infrared detection will be greatly affected by the *** the shortcomings of the existing solutions,this paper puts forward a solution of early warning for vehicle turning meeting based on image acquisition and *** solution combines image acquisition and processing technology,which uses image sensor to perceive traffic condition and image data analysis algorithm to process perceived image,and then utilize LED display screen to issue an early warning.

关键词： Curve traffic turning meeting early warning image identification vehicle detection

A Constructive Proof of Beurling-Lax Theorem

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Chinese Annals of Mathematics,Series B 2015年第1期36卷 141-146页

作者： Qiuhui CHEN Tao QIAN cisco School of Informatics Guangdong University of Foreign Studies Department of Mathematics University of Macao

This paper deals with an alternative proof of Beurling-Lax theorem by adopting a constructive approach instead of the isomorphism technique which was used in the original proof.

关键词： Beurling-Lax theorem Shift operator Inner function

Scalable Incremental Network Programming for Multihop Wireless Sensors

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International Journal of Communications, Network and System Sciences 2013年第1期6卷 37-51页

作者： Jaein Jeong David Culler cisco systems San Jose USA University of California Berkeley USA

We present a network programming mechanism that can flexibly and quickly re-task a large multi-hop network of wireless sensor nodes. Our mechanism allows each sensor node to be incrementally reprogrammed with heterogeneous images of native program code using Rsync block comparison algorithm, point-to-point routing with the BLIP IPv6 stack, and image volume management with Deluge2. With our re-tasking method, we demonstrate an order of magnitude speed-up on small code changes over non-incremental delivery. Our mechanism also scales sub-linearly in the diameter of the network. Collectively, these advancements qualitatively change the software life cycle of the embedded networked systems.

关键词： Network Programming Incremental Update Multihop Networks Heterogeneous Images