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A novel snowdrift game model with edge weighting mechanism on the square lattice

Frontiers of physics 2012年第3期7卷 366-372页

作者： Juan-uan Zhang Hong-yun Ning Zi-yu Yin Shi-wen Sun Li Wang Jun-qing Sun Cheng-yi Xia Tianjin Key Laboratory of Intelligence Computing and Novel Softwave Technology Tianjin University of Technology Tianjin 300384China Key Laboratory of Computer Vision and System of Ministry of Education Tianjin University of TechnologyTianjin 300384China School of Physics Nankai UniversityTianjin 300071China

We propose a novel snowdrift game model with edge weighting mechanism to explore the cooperative behaviors among the players on the square lattice. Based on the assumption of three types of weight distribution including uniform, exponential and power-law schemes, the cooperation level is largely boosted in contrast with the traditional snowdrift game on the unweighted square lattice. Exten- sive numerical simulations indicate that the fraction of cooperators greatly augments, especially for the intermediate range of cost-to-benefit ratio r. Furthermore, we investigate how the cooperative behaviors are affected by the undulation amplitude of weight distribution and noise strength of strat- egy selection, respectively. The simulation results will be conducive to further understanding and analyzing the emergence of cooperation, which is a ubiquitous phenomenon in social and biological science.

关键词： snowdrift game edge weighting mechanism cooperative dynamics

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Decentralized Cooperation Strategies in Two-Dimensional Traffic of Cellular Automata

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Communications in Theoretical Physics 2012年第12期58卷 883-890页

作者：方峻覃征陈喜群冷彪徐朝晖江子能 Department of Computer Science and Technology Tsinghua University Key Laboratory for Information System Security Ministry of Education Department of Civil Engineering Tsinghua University School of Computer Science & Engineering Beihang University School of Software Tsinghua University

We study the two-dimensional traffic of cellular automata using computer simulation. We propose two type of decentralized cooperation strategies, which are called stepping aside (CS-SA) and choosing alternative routes (CS-CAR) respectively. We introduce them into an existing two-dimensional cellular automata (CA) model. CS-SA is designed to prohibit a kind of ping-pong jump when two objects standing together try to move in opposite directions. CS-CAR is designed to change the solution of conflict in parallel update. CS-CAR encourages the objects involved in parallel conflicts choose their alternative routes instead of waiting. We also combine the two cooperation strategies (CS-SA-CAR) to test their combined effects. It is found that the system keeps on a partial jam phase with nonzero velocity and flow until the density reaches one. The ratios of the ping-pong jump and the waiting objects involved in conflict are decreased obviously, especially at the free phase. And the average flow is improved by the three cooperation strategies. Although the average travel time is lengthened a bit by CS-CAR, it is shorten by CS-SA and CS-SA-CAR. In addition, we discuss the advantage and applicability of decentralized cooperation modeling.

关键词： two-dimensional traffic model phase transition decentralized cooperation strategy cellular automata

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Fault Tolerance and Recovery for Group Communication services in Distributed Networks

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Journal of computer science & technology 2012年第2期27卷 298-312页

作者：王跃华周忠 Ling Liu 吴威 State Key Laboratory of Virtual Reality Technology and Systems Beihang UniversityBeijing 100191China School of Computer Science and Engineering Beihang UniversityBeijing 100191China College of Computing Georgia Institute of TechnologyAtlanta 30332U.S.A.

Group communication services （GCSs） are becoming increasingly important as a wide field of promising applications has emerged to serve millions of users distributed across the ***,it is challenging to make the service fault tolerance and scalable to fulfill the voluminous demand of users in a distributed network （DN）.While many reliable group communication protocols have been dedicated to addressing such a challenge so as to accommodate the changes in the network,they are often costly or require complicated strategies to handle the service interruptions caused by node departures or link failures,which hinders the service *** this paper,we present two schemes to address the *** first one is a location-aware replication scheme called NS,which makes replicas in a dispersed fashion that enables the services on nodes to gain immunity of failures with different patterns （e.g.,network partition and single point failure） while keeping replication overhead *** second one is a novel failure recovery scheme that exploits the independence between service recovery and structure recovery in time domain to achieve quick failure *** simulation results indicate that the two proposed schemes outperform the existing schemes and simple alternative schemes in service success rate,recovery latency,and communication cost.

关键词： fault tolerance failure recovery replication location group communication

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Mesh Smoothing Method Based on Local Wave Analysis

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Chinese Journal of Mechanical Engineering 2012年第3期25卷 598-607页

作者： QIN Xujia ZHENG Hongbo CHENG Shiwei LIU Shishuang XU Xiaogang School of Computer Science and Technology Zhejiang University of TechnologyHangzhou 310023China Department of Equipment system and Automatization Dalian Naval AcademyDalian 116018China State Key Laboratory of CAD&CG Zhejiang UniversityHangzhou 310058China

As the mesh models usually contain noise data,it is necessary to eliminate the noises and smooth the *** existed methods always lose geometric features during the smoothing ***,the noise is considered as a kind of random signal with high frequency,and then the mesh model smoothing is operated with signal processing *** wave analysis is used to deal with geometric signal,and then a novel mesh smoothing method based on the local wave is *** proposed method includes following steps：Firstly,analyze the principle of local wave decomposition for 1D signal,and expand it to 2D signal and 3D spherical surface signal processing;Secondly,map the mesh to the spherical surface with parameterization,resample the spherical mesh and decompose the spherical signals by local wave analysis;Thirdly,propose the coordinate smoothing and radical radius smoothing methods,the former filters the mesh points＇ coordinates by local wave,and the latter filters the radical radius from their geometric center to mesh points by local wave;Finally,remove the high-frequency component of spherical signal,and obtain the smooth mesh model with inversely mapping from the spherical *** mesh models with Gaussian noise are processed by local wave based method and other compared *** results show that local wave based method can obtain better smoothing performance,and reserve more original geometric features at the same time.

关键词： mesh models local wave analysis noise smoothing

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Research and application job-shop scheduling in MES based on hybrid of GA/SA

Research and application job-shop scheduling in MES based on...

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2012 International Conference on computer Distributed Control and Intelligent Environmental Monitoring, CDCIEM 2012

作者： Yang, Wenjun Wang, Huaibin Wang, Jinghui Tianjin Key Laboratory of Intelligence Computing and Novel Software Technology School of Computer Science and Technology Tianjin University of Technology Tianjin China

ISBN: (纸本)9780769546391

In manufacturing execution system (MES), Since scheduling of multiple projects is a complex and timeconsuming task, a large number of heuristic rules have been proposed by researchers for such problems. However, each of these rules is usually appropriate for only one specific type of problem. Since the Genetic Algorithm (GA) has its immanent limitations and the Simulated Annealing (SA) Algorithm has the advantages in some aspects, combined these two algorithms together just achieve the perfection. In view of this, a hybrid of GA and SA (GA-SA Hybrid) is proposed in this paper to solve job-shop scheduling problem. The algorithm making the crossover and mutation probability adjusted adaptively and nonlinearly with the completion time, can avoid such disadvantages as premature convergence. The approach is tested on a set of standard instances and compared with other approaches. The Simulation results validate the effectiveness of the proposed algorithm. © 2012 IEEE.

关键词： Job shop scheduling

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Effect of Oxygen Vacancy on the Band Gap and Nanosecond Laser-Induced Damage Threshold of Ta_(2)O_(5) Films

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Chinese Physics Letters 2012年第8期29卷 105-109页

作者： XU Cheng YANG Shuai WANG Ji-Fei NIU Ji-Nan MA Hao QIANG Ying-Huai LIU Jiong-Tian LI Da-Wei TAO Chun-Xian School of Materials Science and Engineering China University of Mining and TechnologyXuzhou 221116 School of Chemical Engineering&Technology China University of Mining and TechnologyXuzhou 221116 Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai 201800 Shanghai Key Laboratory of Modern Optics System School of Optics-Electrical and Computer EngineeringUniversity of Shanghai for Science and technologyShanghai 200093

Ta_(2)O_(5) films are deposited on fused silica substrates by electron beam evaporation *** optical property,x-ray photoelectron spectroscopy,band gap and nanosecond laser-induced damage threshold(LIDT)of the films before and after annealing are *** is found that the existence of an oxygen vacancy results in the decrease of the transmittance,refractive index,both macroscopic band gap and microscopic band gap,and the LIDT of Ta_(2)O_(5) *** the oxygen vacancy forms,the macroscopic band gap decreases 2%.However,when the oxygen vacancy forms the microscopic band gap decreases 73%for crystalline Ta_(2)O_(5) and 77%for amorphous Ta_(2)O_(5).The serious decrease of microscopic band gap may significantly increase the absorbance of the micro-area in Ta_(2)O_(5) films when irradiated by laser,thus the damage probability *** is consistent with our experimental results that the LIDT of the as-deposited Ta_(2)O_(5) films is 7.3 J/cm^(2),which increases 26%to 9.2 J/cm^(2) when the oxygen vacancy is eliminated after annealing.

关键词： vacancy damage Oxygen

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Anonymous Password Authentication Scheme by Using Digital Signature and Fingerprint in Cloud computing

Anonymous Password Authentication Scheme by Using Digital Si...

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International Conference on Cloud and Green computing (CGC)

作者： Ali A. Yassin Hai Jin Ayad Ibrahim Deqing Zou Cluster and Grid Computing Laboratory Services Computing Technology and System Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

Cloud security represents a main hindrance that causes to retard its widespread adoption. Authentication considers a significance element of security in cloud environment, aiming to verify a user's identity when a user wishes to request services from cloud. There are many authentication schemes that depend on username/password, but they are considered weak techniques of cloud authentication. A more secure scheme is the two-factor authentication that does not only verify the username/password pair, but also needs a second factor such as a token device, biometric. However, the feasibility of second-factor authentication is limited by the deployment complexity, high cost and the cloud security is compromised when the token is missing or purloined. Furthermore, these schemes are failed to resist well-known attacks such as replay attacks, reflection attacks. This paper proposes two-factor authentication scheme based on Schnorr digital signature and feature extraction from fingerprint to overcome above aforementioned issues. Security analysis and experimental results illustrate that our proposed scheme can withstand the common security attacks as well, and has a good performance of password authentication.

关键词： Authentication Servers Feature extraction Cryptography Digital signatures Cloud computing

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INSC: An iterative negotiation approach for service compositions

INSC: An iterative negotiation approach for service composit...

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2012 IEEE 9th International Conference on services computing, SCC 2012

作者： He, Qiang Yang, Yun Yan, Jun Jin, Hai Faculty of Information and Communication Technologies Swinburne University of Technology Melbourne VIC 3122 Australia School of Information Systems and Technology University of Wollongong Wollongong NSW Australia Services Computing Technology and System Lab. School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9780769547534

The service-oriented paradigm offers support for engineering service-based systems (SBSs) based on service compositions. The selection of services with the aim to fulfil the quality constraints for SBSs and to achieve the optimisation goals is a critical and challenging issue. In particular, when the quality-of-service (QoS) constraints for a SBS are severe, it is often difficult to find an optimal solution for the SBS. Exploiting the competition among service providers can help SBS developers obtain favourable QoS offers for the component services of SBSs and increase the possibility of finding optimal solutions for the SBSs. In this paper, we present a novel joint optimisation and negotiation approach named Iterative Negotiation for Service Composition (INSC) that supports effective and efficient QoS-aware service selection for SBSs. We evaluate INSC experimentally using example SBSs that are synthetically generated based on a real-world Web service dataset. The experimental results show that INSC can significantly and efficiently increase the possibility of finding optimal solutions in severe service composition scenarios. © 2012 IEEE.

关键词： Quality of service

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A comprehensive monitoring framework for virtual computing environment

A comprehensive monitoring framework for virtual computing e...

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International Conference on Information Networking

作者： Guofu Xiang Hai Jin Deqing Zou Services Computing Technology and System Laboratory Cluster and Grid Computing Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

Virtualization can divide or aggregate the underlying resource flexibly, and it attracts attention from both academic and industry in recent years. Guest operating systems in virtual machines can be various, and the states of virtual machines changes all the time. Due to the complexity of virtual computing environment, it brings tremendous challenges for security monitoring. Existing monitoring mechanism can not adapt to the dynamic and diversity of virtual machines. Therefore, a comprehensive monitoring framework, named ComMon, is proposed in this paper, which implements comprehensive monitoring from three aspects: network, process, and file. It has the characteristics of real-time, transparency and generality.

关键词： Monitoring Registers Kernel Linux Intrusion detection

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Poster abstracts

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Sleep and Biological Rhythms 2016年第1期5卷 A1-A189页

作者： J. Ferrie M. Shipley F. Cappuccio E. Brunner M. Miller M. Kumari M. Marmot A. Coenen J. L. Castillo F. Araya G. Bustamante L. Montecino C. Torres S. Oporto J. Gronli E. Fiske R. Murison B. Bjorvatn E. Sorensen R. Ursin C. M. Portas S. Rajaraman A. Gribok N. Wesensten T. Balkin J. Reifman N. Dursunoglu S. Ozkurt S. Baser O. Delen S. Sarikaya P. Sadler P. Mitchell D. Françon M. Decobert B. Herve A. Richard G. Griebel P. Avenet B. Scatton G. L. Fur D. Eckert A. Jordan A. Wellman S. Smith A. Malhotra D. White D. Bruck I. Thomas A. Kritikos W. Oertel K. Stiasny-Kolster D. Garcia-Borreguero W. Poewe B. Hoegl R. Kohnen E. Schollmayer J. Keffel C. Trenkwalder A. Valle S. Roizenblatt F. Fregni P. Boggio S. Tufik K. Ward L. Robertson L. Palmer P. Eastwood D. Hillman J. Lee S. Mukherjee V. de Padova G. Barbato G. Ficca I. Zilli P. Salzarulo M. Veldi T. Hion V. Vasar M. Kull L. Nowak J. Davis Y. Latzer O. Tzischinsky S. Crowley M. Carskadon M. Anca-Herschkovitsch D. Frey J. Ortega C. Wiseman C. Farley K. Wright A. Campbell A. Neill K. Spiegel R. Leproult E. Tasali N. Scherberg E. van Cauter A. T. Noradina N. A. Karim I. Norlinah A. A. Raymond R. Sahathevan B. Hamidon E. Werth R. Poryazova R. Khatami C. Bassetti R. G. Beran L. Ainley G. Holand J. Duncan H. Kinney B. Davis B. Hood S. Frey C. Schmidt M. Hofstetter P. Peigneux C. Cajochen W.-P. Hu J.-D. Li C. Zhang L. Boehmer J. Siegel Q.-Y. Zhou Y. Sagawa H. Kondo T. Takemura H. Kanayama Y. Kaneko M. Sato T. Kanbayashi Y. Hishikawa T. Shimizu A. Viola L. James L. Schlangen D.-J. Dijk R. Andretic Y.-C. Kim K.-A. Han F. Jones R. Greenspan L. Sanford L. Yang X. Tang K. Dieter E. Uta H. Sven M. Richard N. Oyane S. Pallesen F. Holsten Y. Inoue M. Fujita N. Emura K. Kuroda N. Uchimura A. Johnston J. Astbury G. Kennedy K. Hoedlmoser M. Schabus T. Pecherstorfer S. Moser G. Gruber P. Anderer W. Klimesch N. Naidoo M. Ferber A. Pack D. Neu O. Mairesse G. Hoffmann A. Dris L. Lambrecht P. Linkowski P. Verbanck O. Le Bon N. Matsuura M. Yamao N. Adachi R. Aritomi Y. Komada H. Tanaka S. Shirak University College London London UK University College London London USA Warwick Medical School London UK Warwick Medical School Coventry USA Radboud University Nijmegen Nijmegen Netherlands Department of Neurology University of Chile Santiago Chile Neurology Service Hospital del Salvador Santiago Chile Family Health Center Juan Pablo II Santiago Chile Department of Biomedicine Section on Physiology Univeristy of Bergen Bergen Norway Department of Public Health and Primary Health Care Univeristy of Bergen Bergen Norway Department of Public Health and Primary Health Care University of Bergen Bergen Norway Norwegian Competence Center for Sleep Disorders Haukeland University Hospital Bergen Norway Department of Child and Adolescent Psychiatry Haukeland University Hospital Univeristy of Bergen Bergen Norway Department of Biomedicine University of Bergen Bergen Norway US Army Medical Research and Materiel Command Fort Detrick Frederick USA Walter Reed Army Institute of Research Silver Spring USA Department of Behavioral Biology Walter Reed Army Institute of Research Silver Spring USA Faculty Department of Pulmonology Pamukkale University Medical Denizli Turkey University of Ballarat Ballarat Australia Sanofi-Aventis Recherche et Developpement Paris France Brigham and Women’s Hospital Harvard Medical School Boston USA The University of Queensland Adelaide Australia School of Psychology University of Queensland Brisbane Australia The University of Queensland Brisbane Australia Victoria University Melbourne Australia Department of Psychology Victoria University Melbourne Australia School of Psychology Victoria University Melbourne Australia Philips-Universität Marburg Germany Philips-Universitaet-Marburg Marburg Germany Instituto de Investigaciones del Sueno Madrid Spain Universitätsklinik für Neurologie Innsbruck Austria Universitaetsklinik fuer Neurologie Innsbruck Austria IMEREM GmbH Nuernberg Germany Schwarz Pharma AG Monheim Germany

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