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10th Annual Conference of advanced Computer Architecture, ACA 2014

作者： Lyu, Hui Zheng, Fang Xie, Xianghui State Key Laboratory of Mathematical Engineering and Advanced Computing Wuxi China

ISBN: (纸本)9783662444900

A novel memory consistency model for thousand-core processors is presented. The model simplifies cache coherence for the full chip, and reduces cache design complexity. In addition, the model has the ability to describe the direct exchange of data on chip, thereby alleviating the off-chip memory bandwidth requirements. The paper gives a formal definition of the model, and proves that the model is sequentially consistent. All aspects of the definition are fully used in the process of proof, which means that there is no redundancy in the definition. Therefore, based on the split-range shared memory consistency model, a shared memory system can achieve high performance at low hardware cost. Meanwhile, the model is easy to be understood and used by programmers. © Springer-Verlag Berlin Heidelberg 2014.

关键词： Memory architecture

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The optimization algorithm based on vector space model to determine the influence of microblogging text

The optimization algorithm based on vector space model to de...

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作者： Dong, Yu Chen Liu, Yan Luo, Jun Yong Zhang, Jin State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China

ISBN: (纸本)9783038351399

This article uses the vector space model to express microblogging text in quantity, via the cosine of the angle of text clustering method to calculate the similarity between the text. We can generate alternative microblogging hot cluster by centralized method, by adding the microblogging impact Factor into vector text mold of alternative hotspot clusters. In order to simulate the exclusive advantage of star in the information dissemination process of the real world, we use the alternative hotspot clusters which already weighted the microblogging impact factor to reevaluate its characteristics of vector, to optimize the hot microblogging discovery algorithm and to make the sorting results more in line with the law of information dissemination, finally to give some suggestions and opinions on hot microblogging evaluation method. © (2014) Trans Tech Publications, Switzerland.

关键词： Information dissemination

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Software library functions implementation of a customized High-Level Synthesis environment

Software library functions implementation of a customized Hi...

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2013 2nd International Conference on Frontiers of Energy and Environment engineering, ICFEEE 2013

作者： Dang, Lin-Yu Pang, Jian-Min Yu, Jin-Tao Yang, Jin State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China

ISBN: (纸本)9781138000513

Compared with traditional Hardware Design Languages (HDL) programming, High-Level Synthesis (HLS) can reduce the design difficulty of reconfigurable system. Most HLS tools target for systems on programmable chips, and do not support loosely coupled reconfigurable computers. This paper presents a method for using HLS results in some loosely coupled systems with Ethernet as means of communication. Software processes run on general purpose processors instead of embedded CPUs, and there are only hardware processes on the FPGAs. Software and hardware processes communicate over Ethernet with a self-designed reliable protocol. This paper mainly discusses the software part of this method. Finally, we present some primary experiment results on the PRCA (Proactive Reconfigurable computing Architecture) prototype platform created by our research group. The results indicate that the method is feasible. © 2014 Taylor & Francis Group, London.

关键词： General purpose computers

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Leveraging markov chain and optimal mutation strategy for smart fuzzing

Leveraging markov chain and optimal mutation strategy for sm...

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2014 International Conference on Information and Network Security, ICINS 2014

作者： Ouyang, Yongji Wu, Zehui Mu, Qing Wang, Qingxian State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China

ISBN: (纸本)9781849199094

Fuzz testing is an important way of vulnerability discovery, however, the existing fuzzers based on symbolic execution and others have inherent shortcomings like needing more computing resource, in-depth analysis and so on. To solve above problems, this paper presents a smart fuzzing method based on Markov chain. Firstly, this method optimizes the testing input sample to get the minimal sample set. Secondly, this method records program execution information by using instrument, and makes a Markov model about state. Finally, this method uses Markov chain to detect the change of execution path, and leads tester to choose better samples to mutate. Meanwhile, we analyse mutation strategies in depth for better triggering exception. Experimental data shows that the presented method can help fuzzer to generate effective test samples. We discovers 51 vulnerabilities in software like WPS, along with the code coverage increases of nearly 49% comparing with zzuf and the average exception discovery rate increase nearly 9 times comparing with MiniFuzz.

关键词： Markov processes

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On the Cycle Structure of Some Nonlinear Feedback Shift Registers

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Chinese Journal of Electronics 2014年第4期23卷 801-804页

作者： WANG Zhongxiao XU Hong QI Wenfeng State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou Information Science and Technology Institute Department of Computer Science and Engineering Shanghai Jiao Tong University

In this paper, we partly determine the cycle structure of two types of Nonlinear feedback shift registers(NFSRs). Based on these results, the cycle structure of a class of NFSRs with symmetric feedback functions can be completely characterized. Furthermore, an alternative proof of Kjeldsen’s results is presented. Compared with the original proof based on abstract algebra theory, ours is straightforward and easy to understand.

关键词： Cryptography Stream ciphers Nonlinear feedback shift registers Symmetric functions

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Research on general permutation encryption module based on chaos theory 5

Research on general permutation encryption module based on c...

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2014 5th International Conference on Information Technology for Manufacturing Systems, ITMS 2014

作者： Sun, Wen Jie State Key Laboratory of Mathematical Engineering and Advanced Computing ZhengzhouHenan China

ISBN: (纸本)9783038353263

Replacement and substitution encryption are two basic types of encryption historically. The classical encryption algorithm has been compromised now, but they still can play special role for modern cryptology. For example, in digital image encryption system, substitution can disrupt the original order of the images and eliminate the correlation of image information which not only can realize security of images, but also can resist intentional attack and destruction of clipping and noise. And transposition transformation is introduced into the design of block ciphers. The substitution has the feature of high efficiency and resistance, which makes it meet the specific requirements of encryption. So substitution cypher can be applied to modern encryption system. © (2014) Trans Tech Publications, Switzerland.

关键词： Cryptography

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The 5th International Conference on Biomedical engineering and Biotechnology (ICBEB 2016) Abstracts

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BMC MEDICAL IMAGING 2016年第SUPPL 1期16卷 65-65页

作者： [Anonymous] Department of MRI Shandong Medical Imaging Research Institute Affiliated to Shandong University Jinan Shandong 250021 People’s Republic of China Department of Interventional Radiology Shandong Provincial Hospital Affiliated to Shandong University Jinan Shandong 250021 People’s Republic of China College of Information Science and Technology Engr. Research Center of Digitized Textile & Fashion Tech. for Ministry of Education Donghua University Shanghai 201620 China Intelligent multimedia information processing Lab College of Software Northeastern University Shenyang Liaoning Province 110004 China Institute of Biomedical and Health Engineering Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 China School of Computer Science and Technology Nanjing Normal University Nanjing China Department of Electrical Engineering The City College of New York CUNY New York USA Jiangsu Key Laboratory of 3D Printing Equipment and Manufacturing Nanjing China School of Electronic Science and Engineering Nanjing University Nanjing Jiangsu 210046 China College of Engineering Nanyang Technological University Singapore 639798 Singapore School of Electronic Information Shanghai Dianji University Shanghai China School of Natural Sciences and Mathematics Shepherd University Shepherdstown WV 25443 USA Davis College of Agriculture Natural Resources and Design West Virginia University Morgantown WV 26505 USA State Key Laboratory of Millimeter Waves Southeast University Nanjing 210096 China Center of Medical Physics and Technology Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei China College of Agricultural and Life Sciences University of Florida Gainesville FL 32611 USA Courant Institute of Mathematical Sciences New York University New York NY 10012 USA Translational Imaging Division & MRI Unit Columbia University and New York State Psychiatric Institute New York NY 10032 USA Guangxi Key Laboratory of Manufacturing System & Adv

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Quantum spacetime on a quantum simulator

arXiv

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arXiv 2017年

作者： Li, Keren Li, Youning Han, Muxin Lu, Sirui Zhou, Jie Ruan, Dong Long, Guilu Wan, Yidun Lu, Dawei Zeng, Bei Laflamme, Raymond State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua University Beijing100084 China Institute for Quantum Computing Department of Physics and Astronomy University of Waterloo WaterlooONN2L 3G1 Canada Department of Physics Florida Atlantic University 777 Glades Road Boca RatonFL33431 United States Institut für Quantengravitation Universität Erlangen-Nürnberg Staudtstr. 7/B2 Erlangen91058 Germany Perimeter Institute for Theoretical Physics WaterlooONN2L 2Y5 Canada Department of Physics Center for Field Theory and Particle Physics Fudan University Shanghai200433 China Collaborative Innovation Center of Advanced Microstructures Nanjing210093 China Department of Physics and Institute for Quantum Science and Engineering Southern University of Science and Technology Shenzhen518055 China Department of Mathematics and Statistics University of Guelph GuelphONN1G 2W1 Canada Canadian Institute for Advanced Research TorontoONM5G 1Z8 Canada

We experimentally simulate the spin networks—a fundamental description of quantum spacetime at the Planck level. We achieve this by simulating quantum tetrahedra and their interactions. The tensor product of these quantum tetrahedra comprises spin networks. In this initial attempt to study quantum spacetime by quantum information processing, on a four-qubit nuclear magnetic resonance quantum simulator, we simulate the basic module—comprising five quantum tetrahedra—of the interactions of quantum spacetime. By measuring the geometric properties on the corresponding quantum tetrahedra and simulate their interactions, our experiment serves as the basic module that represents the Feynman diagram vertex in the spin-network formulation of quantum spacetime. Copyright © 2017, The Authors. All rights reserved.

关键词： Geometry

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Author correction: Wafer-scale two-dimensional ferromagnetic Fe3GeTe2 thin films grown by molecular beam epitaxy

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npj 2D Materials and Applications 2017年第1期1卷 1页

作者： Shanshan Liu Xiang Yuan Ce Huang Enze Zhang Jiwei Ling Yanwen Liu Weiyi Wang Cheng Zhang Faxian Xiu Yichao Zou Jin Zou Yu Sheng Kaiyou Wang State Key Laboratory of Surface Physics and Department of Physics Fudan University Shanghai 200433 China Institute for Nanoelectronic Devices and Quantum Computing Fudan University 200433 Shanghai China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093 China Materials Engineering The University of Queensland Brisbane QLD 4072 Australia Centre for Microscopy and Microanalysis The University of Queensland Brisbane QLD 4072 Australia SKLSM Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China

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DEAM: Decoupled, Expressive, Area-Efficient Metadata Cache

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Journal of Computer Science & Technology 2014年第4期29卷 679-691页

作者：刘鹏方磊黄巍 CCF IEEE Department of Information Science and Electronic Engineering Zhejiang University State Key Laboratory of Mathematical Engineering and Advanced Computing ACM Department of Electrical and Computer Engineering University of Rochester NY 14627-0231 U.S.A.

Chip multiprocessor presents brand new opportunities for holistic on-chip data and coherence management solutions. An intelligent protocol should be adaptive to the fine-grain accessing behavior. And in terms of storage of metadata, the size of conventional directory grows as the square of the number of processors, making it very expensive in large-scale systems. In this paper, we propose a metadata cache framework to achieve three goals： 1） reducing the latency of data access and coherence activities, 2） saving the storage of metadata, and 3） providing support for other optimization techniques. The metm：lata is implemented with compact structures and tracks the dynamically changing access pattern. The pattern information is used to guide the delegation and replication of decoupled data and metadata to allow fast access. We also use our metadata cache as a building block to enhance stream prefetching. Using detailed execution-driven simulation, we demonstrate that our protocol achieves an average speedup of 1.12X compared with a shared cache protocol with 1/5 of the storage of metadata.

关键词： cache directory multiprocessor

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