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HIGH EPITAXIAL FERROELECTRIC RELAXOR Mn-DOPED Ba(Zr,Ti)O_(3) THIN FILMS ON MgO SUBSTRATES

Journal of Advanced Dielectrics 2011年第4期1卷 383-387页

作者： M.LIU J.LIU G.COLLINS C.R.MA C.L.CHEN A.D.ALEMAYEHU G.SUBRAMANYAM C.DAI Y.LIN J.HE J.C.JIANG E.I.MELETIS A.BHALLA Q.Y.ZHANG Department of Physics and Astronomy University of Texas at San Antonio San Antonio TX 78249USA Key Lab of Materials Modification by Laser Ion Electron BeamsDalian University of Technology Dalian 116024P.R.China The Texas Center for Superconductivity University of Houston HoustonTX 77204USA Department of Electrical and Computer Engineering University of Dayton DaytonOhio 45469USA State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu Sichuan 610054P.R.China Department of Material Science and Engineering University of Texas at Arlington Arlington TX 76019USA Department of Electrical and Computer Engineering University of Texas at San Antonio San Antonio TX 78249USA

Environment friendly ferroelectric relaxor Ba(Zr_(0.2)Ti_(0.8))O_(3)thin fims with the addition of 2%Mn dopant were grown on(001)MgO substrates by pulsed laser *** studies with X-ray di®raction and transmission electron microscopy reveal that the as-grown Ba(Zr_(0.2)Ti_(0.8))O_(3) thin films are c-axis oriented with an atomic sharp *** films have good single crystallinity and good epitaxial *** interface relationship was determined to be[100]***//[100]MgO and(001)***//(001)*** order/disorder relaxor structures were found with nano-columnar *** microwave dielectric measurements(15-18GHz)indicate that the¯lms have excellent dielectric properties with large dielectric constant value,high tunability,and low dielectric loss,promising the development of room temperature tunable microwave elements.

关键词： Ferroelectric relaxor thin films Ba(Zr_(0.2)Ti_(0.8))O_(3) dielectric microwave

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Research on the adaptable reputation-based scheduling for storage resources in data grids

Research on the adaptable reputation-based scheduling for st...

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International Conference on Internet Technology and Applications, ITAP 2010

作者： Liu, Wei Huang, Xun Du, Wei Department of Computer Science Wuhan University of Technology Wuhan 430063 China State Key Lab. of Software Engineering Wuhan University Wuhan 430072 China China State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210093 China Institute of Computer Science Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9781424451432

Data grids provide the data-intensive applications with a large virtual stroage framework. We use a reputation-based trust aggregation approach for data providers to quantitatively predict and calculate whether or not they are reliable and credible. In the same time, adaptable trust service is increasingly important for applications running on data grids. However, existing systems are unable to satisfy the flexible trust needs of complex data-intensive applications. This paper introduced a novel approach and proposed a quality of reputation-based trust framework for storage resources in data grids (QRTF). QRTF leverages the manager to dynamically control quality of trust for application requests, thereby achieving good tradeoffs between reputation-based trust service and system performance. Experimental results based on a simulated grid with storage resources show that the proposed framework is capable of significantly improving trust service quality and guaranteeing desired response time. ©2010 IEEE.

关键词： Digital storage

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Energy-efficient task Clustering Scheduling on homogeneous clusters

Energy-efficient task Clustering Scheduling on homogeneous c...

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11th International Conference on Parallel and Distributed Computing, Applications and Technologies, PDCAT 2010

作者： Liu, Wei Li, Hongfeng Shi, Feiyan Department of Computer Science Wuhan University of Technology Wuhan 430063 China State Key Lab. of Software Engineering Wuhan University Wuhan 430072 China China State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210093 China Wuhan University of Technology Department of Computer Science Wuhan China

ISBN: (纸本)9780769542874

Clusters provide powerful computing performance is at cost of huge energy consumption. Scheduling a parallel application with a set of precedence-constrained tasks on cluster is challenging because of high communication cost. Although task duplication based scheduling algorithm is applied to minimize communication overhead, most of them only consider scheduling lengths, however completely ignoring energy consumption of cluster. Based on this consideration, we propose a novel Energy-Performance Balanced Task Duplication based Clustering Scheduling algorithm (EPBTDCS for short) in homogenous clusters which can significantly saving energy by judiciously shrinking communication energy consumption when assigning parallel tasks to computing nodes. This algorithm not only reduces energy dissipation in cluster without significantly degrading system performance, but also gets an optimal scheduling with a simple and loose condition. We conducted extensive experiments based on real-world SPEC fpppp and Sparse Matrix Solver parallel tasks applications running on a simulated cluster. By comparing with task duplication-based scheduling (TDS for short) and non-duplication-based scheduling (MCP for short) algorithms to prove our algorithm can save energy consumption greatly. © 2010 IEEE.

关键词： Scheduling algorithms

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A kind of service-aware computing method for Web-based mobile application with uncertainty

A kind of service-aware computing method for Web-based mobil...

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2010 IEEE 5th International Conference on Bio-Inspired Computing: Theories and Applications, BIC-TA 2010

作者： Zhang, De-Gan Kang, Xue-Jing Dai, Wen-Bo Chen, Ying Fayek, Moaty Tianjin Key Lab. of Lntelligent Computing and Novel Software Technology Tianjin University of Technology 300191 China Key Laboratory of Computer Vision and System Tianjin University of Technology Ministry of Education 300191 Tiajin China Department of Computer Science California State University Chico CA 95929 United States

ISBN: (纸本)9781424464388

As we know, service-aware computing is an important part of pervasive computing for Web-based mobile application with uncertainty. We modified the fusion method of evidence information after considering context's reliability, time-efficiency, and relativity, which has improved the classical fusion rule of D-S (Dempster-Shafer) Evidence Theory when being used in the pervasive computing paradigm. We call it EDS. After extending the process, we overcome the drawbacks of classical D-S Evidence Theory. All these suggested technologies have been successfully used in our service-aware computing projects. The efficiency of our researches has been shown by our many application practices. © 2010 IEEE.

关键词： Ubiquitous computing

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Adaptive and impulsive cluster synchronization of a general complex dynamical network

Adaptive and impulsive cluster synchronization of a general ...

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2010 International Conference on Networking, Sensing and Control, ICNSC 2010

作者： Shi, Bingxiong Lu, Junan Lü, Jinhu Yu, Xinghuo College of Mathematics and Statistics State Key Lab. of Software Engineering Wuhan University Wuhan 430072 China Key Laboratory of Systems and Control Institute of Systems Science Chinese Academy of Sciences Beijing 100190 China School of Electrical and Computer Engineering RMIT University Melbourne 3000 Australia School of Electrical and Computer Engineering RMIT University Melbourne VIC 3001 Australia

ISBN: (纸本)9781424464531

Recently, cluster synchronization has attracted an increasing interest in various disciplines, includingmathematics, physics, and engineering sciences. This paper further investigates the cluster synchronization of a complex dynamical network by using adaptive and impulsive control techniques, respectively. Based on a complex dynamical network with two different clusters, several adaptive and impulsive cluster synchronization criteria are then proposed. It should be especially pointed out that the dynamics and its dimensions of the individual dynamical systems are different in the two different clusters. Also, some numerical simulations are given to verify the effectiveness of the above theoretical results. ©2010 IEEE.

关键词： Dynamical systems

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Detection of behavioral contextual properties in asynchronous pervasive computing environments

Detection of behavioral contextual properties in asynchronou...

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16th IEEE International Conference on Parallel and Distributed Systems, ICPADS 2010

作者： Huang, Yu Yu, Jianping Cao, Jiannong Tao, Xianping State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210093 China Department of Computer Science and Technology Nanjing University Nanjing 210093 China Internet and Mobile Computing Lab. Department of Computing Hong Kong Polytechnic University Hong Kong Hong Kong

ISBN: (纸本)9780769543079

Detection of contextual properties is one of the primary approaches to enabling context-awareness. In order to adapt to temporal evolution of the pervasive computing environment, context-aware applications often need to detect behavioral properties specified over the contexts. This problem is challenging mainly due to the intrinsic asynchrony of pervasive computing environments. However, existing schemes implicitly assume the availability of a global clock or synchronous coordination, thus not working in asynchronous environments. We argue that in pervasive computing environments, the concept of time needs to be reexamined. Toward this objective, we propose the Ordering Global Activity (OGA) algorithm, which detects behavioral contextual properties in asynchronous environments. The essence of our approach is to utilize the message causality and its on-the-fly coding as logical vector clocks. The OGA algorithm is implemented and evaluated based on the open-source context-aware middleware MIPA. The evaluation results show the impact of asynchrony on the detection of contextual properties, which justifies the primary motivation of our work. They also show that OGA can achieve accurate detection of contextual properties in dynamic pervasive computing environments. © 2010 IEEE.

关键词： Middleware

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Middleware support for context-awareness in asynchronous pervasive computing environments

Middleware support for context-awareness in asynchronous per...

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International Workshop on Wireless Network Algorithm and Theory

作者： Yu, Jianping Huang, Yu Cao, Jiannong Tao, Xianping State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210093 China Department of Computer Science and Technology Nanjing University Nanjing 210093 China Internet and Mobile Computing Lab. Department of Computing Hong Kong Polytechnic University Hong Kong Hong Kong

ISBN: (纸本)9780769543222

Context-awareness is an essential feature of pervasive applications, and runtime detection of contextual properties is one of the primary approaches to enabling context-awareness. However, existing context-aware middleware does not provide sufficient support for detection of contextual properties in asynchronous environments. We argue that in asynchronous environments, the concept of time needs to be reexamined. Instead of assuming the availability of global time or synchronous interaction, we should rely on logical time. To this end, we present the Middleware Infrastructure for Predicate detection in Asynchronous environments (MIPA), which supports context-awareness based on logical time. Design and operation of MIPA are explained in detail. We also evaluate MIPA with a comprehensive case study. The evaluation results show the cost-effectiveness and scalability of MIPA. © 2010 IEEE.

关键词： Cost effectiveness

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Generalized synchronization control of discrete-time chaotic systems

Generalized synchronization control of discrete-time chaotic...

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2010 6th International Conference on Natural Computation, ICNC'10

作者： Li, Yin Wei, Rui Ying Wu, Qi Yan, Wei Zhan, Ming Department of Mathematics and Computer Shaoguan University Shaoguan 512005 China Jiangsu Key Laboratory for Design and MMNBInst. Southeast University Nanjing 211189 China Department of Mathematics South China University of Technology Guangzhou 510640 China University of Electronic Science and Technology State Telecom Anti-Inter Key Lab. Chengdu 610054 China

ISBN: (纸本)9781424459612

A systematic and concrete scheme is proposed to study generalized synchronization control of discrete-time chaotic systems based on the active control idea and the backstepping design method. The scheme is accessible to generalized synchronization control of two identical chaotic maps. The 3D discrete-time Grassi-Miller map and 3D generalized H´enon map are chosen to illustrate the proposed scheme, and numerical simulations are given to show the effectiveness of the proposed chaos synchronization method. © 2010 IEEE.

关键词： Numerical methods

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PAPR Reduction in All-optical OFDM Systems Based on Phase Pre-emphasis

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Journal of Physics: Conference Series 2011年第1期276卷

作者： Zhou He Wei Li Zhiyong Tao Ji ng Shao Xiaojun Liang Zhuanhua Deng Dexiu Huang Wuhan National Lab for Optoelectronics Department of Optoelectronics Engineering Huazhong University of Science and Technology Wuhan 430074 P.R.China State Key Laboratory of Optical Communication Technologies and Networks Wuhan Research Institute of Posts and Telecommunications Wuhan 430074 P.R.China School of Computer Science and Technology Hubei University of Economics Wuhan 430205 P.R.China

This paper investigates the peak-to-average power ratio (PAPR) theory in all-optical orthogonal frequency division multiplexing (OFDM) optical fibre communication systems. We find out that phase pre-emphasis could effectively reduce PAPR in all-optical OFDM communication systems which employ intensity modulation-direct detection (IM-DD) method. An equation is developed and proposed to calculate suitable phasing values for pre-emphasis. Furthermore, we find out that phase pre-emphasis cannot reduce PAPR effectively in all-optical OFDM systems that employ Phase Shift keying (PSK) or Quadracture Amplitude Modulation (QAM) method.

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Erratum: “Investigation of a binuclear gallium complex with bipolar charge transporting capability for organic light-emitting diodes” [J. Chem. Phys. 124, 024719 (2006)]

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The Journal of Chemical Physics 2011年第2期134卷

作者： Juan Qiao Hang Tan Yong Qiu K. Balasubramanian 1Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education Department of Chemistry Tsinghua University Beijing 100084 China 2Department of Mathematics and Computer Science California State University East Bay Hayward California 94542 USA Chemistry and Material Science Directorate Lawrence Livermore National Laboratory Livermore University of California California 94550 USA and Glenn T. Seaborg Center Lawrence Berkeley Laboratory University of California Berkeley California 94720 USA

The isocontour plots of Figs. 2 and 3 in the original published version of this paper1 correspond to an isocontour value of |Ψ| = 0.010 a.u. not 0.025 a.u. The

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