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A general communication performance evaluation model based on routing path decomposition

Journal of zhejiang university-science C(computers and electronics) 2011年第7期12卷 561-573页

作者： Ai-lian cheng 1,Yun PAN 1,2,Xiao-lang YAN 2,Ruo-hong HUAN 3 (1 department of Information science and Electronic engineering,zhejiang university,hangzhou 31002.,china) (2 institute of VLSI Design,zhejiang university,hangzhou 31002.,china) (3 College of computer science and Technology,zhejiang university of Technology,hangzhou 31002.,china) department of Information science and Electronic engineering Zhejiang University institute of VLSI Design Zhejiang University

The network-on-chip (NoC) architecture is a main factor affecting the system performance of complicated multi-processor systems-on-chips (MPSoCs).To evaluate the effects of the NoC architectures on communication efficiency,several kinds of techniques have been developed,including various simulators and analytical *** simulators are accurate but time consuming,especially in large space explorations of diverse network configurations;in contrast,the analytical models are fast and flexible,providing alternative methods for performance *** this paper,we propose a general analytical model to esti-mate the communication performance for arbitrary NoCs with wormhole routing and virtual channel flow *** resolve the inherent dependency of successive links occupied by one packet in wormhole routing,we propose the routing path decomposition approach to generating a series of ordered link *** we use the traditional queuing system to derive the fine-grained transmission latency for each network *** to our experiments,the proposed analytical model provides a good approximation of the average packet latency to the simulation results,and estimates the network throughput precisely under various NoC configurations and ***,the analytical model runs about 10 5 times faster than the cycle-accurate NoC *** applications of the model including bottleneck detection and virtual channel allocation are also presented.

关键词： Analytical model Communication performance Network-on-chip (NoC) Queuing system Routing path decom-position Virtual channel

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Surface Modeling from 3D Unorganized Points

Surface Modeling from 3D Unorganized Points

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2002年IEEE十区计算机、通信、控制和电机工程会议

作者： LIANG Ronghua CHEN Chun PAN Zhigeng jin cheng department of compute science and engineering, zhejiang university hangzhou china 31002. department of computer science and engineering, hangzhou institute of electronics engineering, hangzhou china 31002. state key lab of cad&cg, zhejiang university hangzhou china 31002.

Surface modeling from 3D unorganized points is ofgreat importance in variable fields such as computer vision,images based modeling, scientific computing visualization, etc..In this paper we present a new algorithm based on HuguesHoppe algorithm. First these points are divided into logicalcubes whose size is decided automatically from theunorganized points. Then the tangent planes and normal vectorsat each point are calculated and the normal vectors areorientated to the outside of surface based on WFS. Finally thesurface model of triangular meshes can be obtained by theoutput of Marching Cubes. Experimental results show the highefficiency of the algorithm.

关键词： 3D triangulation WFS Marching Cubes iso-surface

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Optimal Strategy for Concurrent Variable Interval Reinforcement Schedule

Optimal Strategy for Concurrent Variable Interval Reinforcem...

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2010 Chinese Control and Decision Conference

作者： Zhenbo cheng~(1,2),Ming Liang~2,Zhidong Deng~2 1.Information and engineering College,zhejiang university of Technology,hangzhou,310014,china 2.state key laboratory on Intelligent Technology and Systems, Tsinghua National laboratory for Information science and Technology, department of computer science and Technology,Tsinghua university,Beijing,100084,china

＜正＞Herrnstein experimentally studied the choice behavior of pigeons on a special reinforcement schedule,the concurrent variable interval（CVI） schedule,and found a famous matching *** empirical behavior law is remarkably conserved across many kinds of species,but it has been viewed as an irrational behavior,which means that the matching behavior does not maximize *** this paper,we succinctly demonstrate that any strategies leading to matching law can obtain maximal rewards for the CVI reinforcement schedule in discrete time *** addition,we put forward a novel strategy algorithm that can earn the maximal reward in the CVI reinforcement *** results reveal that the matching behavior can be seen as a rational behavior in the reinforcement schedule.

关键词： Reinforcement Schedule Matching Law Optimal Strategy Matching Strategy

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Periodic void arrays in silica and BK7 glasses induced by tight-focused femtosecond laser pulses

Periodic void arrays in silica and BK7 glasses induced by ti...

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2006年全国强场激光物理会议

作者： Haiyi Sun Jue Song chengbin Li Jian Xu Xinshun Wang Jianrong Qiu Ya cheng Zhizhan Xu state key laboratory of High Field Laser Physics,Shanghai institute of Optics and Fine Mechanics,Chinese Academy of sciences,P.O.Box 800-211,Shanghai 201800,P.R.china ~2department of Materials science and engineering,zhejiang university,hangzhou 31002.7,china

＜正＞We demonstrate self-fabricated periodic void arrays inside fused silica and BK7 glass induced by tight focusing（NA=0.9）femtosecond laser pulses under the condition of deep focal *** effects of the focusing conditions,including laser energy,pulse number and focal depth on the shape and the whole length of the fabricated void arrays were *** divided single void was easily fabricated when multiple pulses were irradiated.A single laser pulse tended to induce a staged linearly drawn shape,and the staged character showed more evident with increasing focusing *** whole length of microstructure was strongly dependent on the depth of the focal point,pulse energy and pulse number,which became longer with the increase of these parameters,but not infinite,it will decrease again as these parameters increase to a certain *** was more evident in silica glass than in BK7 glass due to the larger nonlinear refraction index of silica glass.

关键词： femtosecond laser fused silica BK7 glass void array whole length

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实时Linux操作系统的研究与设计

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湘潭矿业学院学报 2000年第3期15卷 71-75页

作者：李方敏李仁发叶澄清湘潭工学院信息工程系湖南湘潭411201 浙江大学计算机系浙江杭州310027

随着PC系统价格的降低、性能和可靠性的不断提高以及控制领域对操作系统的Linux的推出 ,无疑为用户开发实时、嵌入系统提供了机遇首先讨论了通用与实时操作系统的区别 ,然后介绍了在Linux内核与硬件中断之间增加一个实时内核的方法来... 详细信息

随着PC系统价格的降低、性能和可靠性的不断提高以及控制领域对操作系统的Linux的推出 ,无疑为用户开发实时、嵌入系统提供了机遇首先讨论了通用与实时操作系统的区别 ,然后介绍了在Linux内核与硬件中断之间增加一个实时内核的方法来提供中断仿真、实时任务调度等功能 ,最后讨论了实时任务的设计图 1 ,参

关键词：实时操作系统中断仿真实时任务调度 Linux

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A Bayesian Framework for Crowding Effect

A Bayesian Framework for Crowding Effect

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2010 Chinese Control and Decision Conference

作者： Zhenbo cheng~(1,3),Wenfeng Chen~2,Tian Ran~2,Zhidong Deng~1,Xiaolan Fu~2 1.state key laboratory on Intelligent Technology and Systems,Tsinghua National La oratory for Information science and Technology,department of computer science,Tsinghua university,Beijing 100084,china 2.state key laboratory of Brain and Cognitive science institute of Psychology,Beijing 100101,china 3.Information and engineering College,zhejiang university of Technology,hangzhou,310014,china

＜正＞In crowding,neighboring distractors impair the visual perception of a presented ta *** study influences by the configuration of distractors on the bias to perceive the orientation of a *** results show that:（a） when distractors are similar to each other but different from target,crowding is decreased;（b） when distractors form a subjective contour,crowding is also *** results illustrate that crowding is weak whenever the target stands out from the context and strong when the target is grouped into the context as a part of a global *** addition,we show how a Bayesian model,based on the principle of spatial resolution of attention that is modulated by the large size of receptive fields,can account for the behavioral data.

关键词： Crowding Effect Bayesian Model Generative Model Inferential Model

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A disk I/O optimized system for concurrent graph processing jobs

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Frontiers of computer science 2024年第3期18卷 13-29页

作者： Xianghao XU Fang WANG Hong JIANG Yongli cheng Dan FENG Peng FANG School of computer science and engineering Nanjing University of Science and TechnologyNanjing 210094China Wuhan National laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China department of computer science&engineering University of Texas at ArlingtonArlingtonTX 76019USA College of computer and Data science Fuzhou UniversityFuzhou 350108China zhejiang lab Hangzhou 311121China

In order to analyze and process the large graphs with high cost efficiency,researchers have developed a number of out-of-core graph processing systems in recent years based on just one commodity *** the other hand,with the rapidly growing need of analyzing graphs in the real-world,graph processing systems have to efficiently handle massive concurrent graph processing(cgP)***,due to the inherent design for single graph processing job,existing out-of-core graph processing systems usually incur unnecessary data accesses and severe competition of I/O bandwidth when handling the cgP *** this paper,we propose GraphCP,a disk I/O optimized out-of-core graph processing system that efficiently supports the processing of cgP *** proposes a benefit-aware sharing execution model to share the I/O access and processing of graph data among the cgP jobs and adaptively schedule the graph data loading based on the states of vertices,which efficiently overcomes above challenges faced by existing out-of-core graph processing ***,GraphCP adopts a dependency-based future-vertex updating model so as to reduce disk I/Os in the future *** addition,GraphCP organizes the graph data with a Source-Sorted Sub-Block graph representation for better processing capacity and I/O access *** evaluation results show that GraphCP is 20.5×and 8.9×faster than two out-of-core graph processing systems GridGraph and GraphZ,and 3.5×and 1.7×faster than two state-of-art concurrent graph processing systems Seraph and GraphSO.

关键词： graph processing disk I/O concurrent jobs

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CORMAND2--针对工业机器人的欺骗攻击

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engineering 2024年第1期32卷 186-201页

作者： Hongyi Pu Liang He Peng cheng Jiming Chen Youxian Sun College of Control science and engineering Zhejiang UniversityHangzhou 310000China department of computer science and engineering university of Colorado Denver DenverCO 999039USA

Industrial robots are becoming increasingly vulnerable to cyber incidents and attacks,particularly with the dawn of the Industrial Internet-of-Things(IIoT).To gain a comprehensive understanding of these cyber risks,vulnerabilities of industrial robots were analyzed empirically,using more than three million communication packets collected with testbeds of two ABB IRB120 robots and five other robots from various original equipment manufacturers(OEMs).This analysis,guided by the confidentiality-integrity-availability(CIA)triad,uncovers robot vulnerabilities in three dimensions:confidentiality,integrity,and *** vulnerabilities were used to design Covering Robot Manipulation via Data Deception(CORMAND2),an automated cyber-physical attack against industrial ***2 manipulates robot operation while deceiving the Supervisory Control and Data Acquisition(ScadA)system that the robot is operating normally by modifying the robot’s movement data and data ***2 and its capability of degrading the manufacturing was validated experimentally using the aforementioned seven robots from six different ***2 unveils the limitations of existing anomaly detection systems,more specifically the assumption of the authenticity of ScadA-received movement data,to which we propose mitigations for.

关键词： Industrial robots Vulnerability analysis Deception attacks Defenses

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GPU加速的演化算法求解多目标流水车间调度问题

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计算机应用 2024年第5期44卷 1364-1371页

作者：姜涛梁振宇程然金耀初南方科技大学计算机科学与工程系广东深圳518055 鹏城实验室广东深圳518055 西湖大学杭州310012

智能制造和环境可持续性研究中,多目标调度问题对于协调生产效率、成本管理与环境保护之间的平衡具有至关重要的意义,但现有基于CPU的调度解决方案在处理大规模生产任务时仍面临效率和时效性的限制,而GPU的并行计算能力可为优化大规模... 详细信息

智能制造和环境可持续性研究中,多目标调度问题对于协调生产效率、成本管理与环境保护之间的平衡具有至关重要的意义,但现有基于CPU的调度解决方案在处理大规模生产任务时仍面临效率和时效性的限制,而GPU的并行计算能力可为优化大规模流水车间调度问题提供新的解决途径。针对多目标零等待流水车间调度问题(NWFSP),以同时最小化最大完成时间和总能耗(TEC)为优化目标,构建了混合整数线性规划模型(MILP)表征该调度问题,并提出一种基于GPU加速的张量化演化算法(Tensor-GPU-NSGA-Ⅱ)求解该问题。Tensor-GPU-NSGA-Ⅱ的主要创新在于对NWFSP关于最小化最大完成时间和TEC的计算过程的张量化处理,并提出了一种基于GPU的并行种群更新方法。实验结果表明,在500工件和20机器的问题规模下,Tensor-GPU-NSGA-Ⅱ在计算效率上相较于传统NSGA-Ⅱ算法取得了9761.75的加速比;且随着种群规模的增加,它的加速性能有显著提升。

关键词：智能制造多目标优化流水车间调度 GPU加速张量化方法

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Black-hole-inspired thermal trapping with graded heat-conduction metadevices

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National science Review 2023年第2期10卷 131-138页

作者： Liujun Xu jinrong Liu Peng jin Guoqiang Xu Jiaxin Li Xiaoping Ouyang Ying Li cheng-Wei Qiu Jiping Huang department of Physics State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (MOE) Fudan University department of Electrical and computer engineering National University of Singapore Graduate School of china Academy of engineering Physics School of Materials science and engineering Xiangtan University Interdisciplinary Center for Quantum Information State Key Laboratory of Modern Optical InstrumentationZJU-Hangzhou Global Scientific and Technological Innovation CenterZhejiang University International Joint Innovation Center Key Laboratory of Advanced Micro/Nano Electronic Devices and Smart Systems of Zhejiang The Electromagnetics Academy of Zhejiang University Zhejiang University

The curved space-time produced by black holes leads to the intriguing trapping *** far,metadevices have enabled analogous black holes to trap light or sound in laboratory ***,trapping heat in a conductive environment is still challenging because diffusive behaviors are *** by black holes,we construct graded heat-conduction metadevices to achieve thermal trapping,resorting to the imitated advection produced by graded thermal conductivities rather than the trivial solution of using insulation materials to confine thermal *** experimentally demonstrate thermal trapping for guiding hot spots to diffuse towards the *** heat-conduction metadevices have advantages in energy-efficient thermal regulation because the imitated advection has a similar temperature field effect to the realistic advection that is usually driven by external energy *** results also provide an insight into correlating transformation thermotics with other disciplines,such as cosmology,for emerging heat control schemes.

关键词： thermal trapping graded metadevices imitated advection

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