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3rd International Conference on Cyberspace Technology, CCT 2015

作者： Niu, Kan Wang, Jin-Dong Zhang, Heng-Wei Wang, Na Zhengzhou Institute of Information Science and Technology Zhengzhou450001 China State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou450001 China

ISBN: (纸本)9781785610899

Focusing on the problem of high efficiency resource scheduling in cloud computing environment, since current resource scheduling algorithm has been less given consideration to the shortest completion time and the least cost of the services, the fitness function which can comprehensive response the time and cost was designed, and an estimation of distribution-shuffled frog leaping algorithm (EDSFLA) was proposed. This algorithm redefined the evolutional operators of shuffled frog leaping algorithm (SFLA), utilizing the cross operators of genetic algorithm, targeted in applying to scheduling problem with integer-coded. EDSFLA introduced evolutionary strategy of estimation of distribution to break the confine of search pattern in the standard SFLA, and made the learning ability of this algorithm more comprehensive. Experimental results show that this algorithm has more capability in convergence and searching ability compared with the standard SFLA and EDA in solving cloud resource scheduling problems.

关键词： Cloud computing

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Research for modeling network security based on attack-defense grapy of state reduction 3

Research for modeling network security based on attack-defen...

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3rd International Conference on Cyberspace Technology, CCT 2015

作者： Li, Tao Zhang, Hengwei Wang, Jindong Wang, Na Zhengzhou Institute of Information Science and Technology Zhengzhou 450001 China State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou 450001 China

ISBN: (纸本)9781785610899

In order to assess network security threats better, we model the attacker's and defender's behavior based on attackdefense graph from the perspective of both attacker and defender, which lays the foundation of the further research for the scientific and precise information security threat assessment. Due to the existing problems of generating traditional attack-defense graph (e.g. explosion of state space, and the large-scale and complex generation of attack-defense graph), we in this paper propose a method for generating attack-defense graph based on state reduction, then we model the behavior of attacker and defender in network security. Finally, the method and the model proposed in this paper are proved to be scientific and effective within a typical network scenario.

关键词： Network security

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Practical attacks on decoy-state quantum-key-distribution systems with detector efficiency mismatch

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Physical Review A 2015年第5期91卷 052305-052305页

作者： Yangyang Fei Ming Gao Weilong Wang Chaobo Li Zhi Ma State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou Henan 450001 China

To the active-basis-choice decoy-state quantum-key-distribution systems with detector efficiency mismatch, we present a modified attack strategy, which is based on the faked states attack, with quantum nondemolition measurement ability to restress the threat of detector efficiency mismatch. Considering that perfect quantum nondemolition measurement ability doesn't exist in real life, we also propose a practical attack strategy using photon number resolving detectors. Theoretical analysis and numerical simulation results show that, without changing the channel, our attack strategies are serious threats to decoy-state quantum-key-distribution systems. The eavesdropper may get some information about the secret key without causing any alarms. Besides, the lower bound of detector efficiency mismatch to run our modified faked states attack successfully with perfect quantum nondemolition measurement ability is also given out, which provides the producers of quantum-key-distribution systems with a reference and can be treated as the approximate secure bound of detector efficiency mismatch in decoy-state quantum-key-distribution systems.

关键词： QUANTUM systems QUANTUM states DETECTORS CYBERTERRORISM QUANTUM measurement

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Business process mining based insider threat detection system

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Tongxin Xuebao/Journal on Communications 2016年 37卷 180-188页

作者： Zhu, Tai-Ming Guo, Yuan-Bo Ju, An-Kang Ma, Jun School of Cyberspace Security PLA Information Engineering University Zhengzhou450001 China State Key Laboratory of Mathematical Engineering and Advanced Computing Wuxi214000 China

Current intrusion detection systems are mostly for detecting external attacks, but sometimes the internal staff may bring greater harm to organizations in information security. Traditional insider threat detection methods often do not combine the behavior of people with business activities, making the threat detection rate to be improved. An insider threat detection system based on business process mining from two aspects was proposed, the implementation of insider threats and the impact of threats on system services. Firstly, the normal control flow model of business activities and the normal behavior profile of each operator were established by mining the training log. Then, the actual behavior of the operators was compared with the pre-established normal behavior contours during the operation of the system, which was supplemented by control flow anomaly detection and performance anomaly detection of business processes, in order to discover insider threats. A variety of anomalies were defined and the corresponding detection algorithms were given. Experiments were performed on the ProM platform. The results show the designed system is effective. © 2016, Editorial Board of Journal on Communications. All right reserved.

关键词： Intrusion detection

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Pressure-induced Superconductivity in the three-component fermion topological semimetal molybdenum phosphide

arXiv

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arXiv 2017年

作者： Chi, Zhenhua Chen, Xuliang An, Chao Yang, Liuxiang Zhao, Jinggeng Feng, Zili Zhou, Yonghui Zhou, Ying Gu, Chuanchuan Zhang, Bowen Yuan, Yifang Kenney-Benson, Curtis Yang, Wenge Wu, Gang Wan, Xiangang Shi, Youguo Yang, Xiaoping Yang, Zhaorong Key Laboratory of Materials Physics Institute of Solid State Physics Chinese Academy of Sciences Hefei230031 China Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field Laboratory Chinese Academy of Sciences Hefei230031 China University of Science and Technology of China Hefei230026 China Beijing100094 China Department of Physics Harbin Institute of Technology Harbin150080 China Natural Science Research Center Academy of Fundamental and Interdisciplinary Sciences Harbin Institute of Technology Harbin150080 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing100190 China School of Physical Sciences University of Chinese Academy of Sciences Beijing100190 China Department of Physics and Engineering Zhengzhou University Zhengzhou450052 China HPCAT Geophysical Laboratory Carnegie Institution of Washington ArgonneIL60439 United States Shanghai201203 China Institute of High Performance Computing 1 Fusionopolis Way 16-16 Connexis Singapore138632 Singapore National Laboratory of Solid State Microstructures College of Physics Nanjing University Nanjing210093 China Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing210093 China

Topological semimetal, a novel state of quantum matter hosting exotic emergent quantum phenomena dictated by the non-trivial band topology, has emerged as a new frontier in condensed-matter physics. Very recently, a coexistence of triply degenerate points of band crossing and Weyl points near the Fermi level was theoretically predicted and immediately experimentally verified in single crystalline molybdenum phosphide (MoP). Here we show in this material the high-pressure electronic transport and synchrotron X-ray diffraction (XRD) measurements, combined with density functional theory (DFT) calculations. We report the emergence of pressure-induced superconductivity in MoP with a critical temperature Tc of about 2 K at 27.6 GPa, rising to 3.7 K at the highest pressure of 95.0 GPa studied. No structural phase transitions is detected up to 60.6 GPa from the XRD. Meanwhile, the Weyl points and triply degenerate points topologically protected by the crystal symmetry are retained at high pressure as revealed by our DFT calculations. The coexistence of three-component fermion and superconductivity in heavily pressurized MoP offers an excellent platform to study the interplay between topological phase of matter and superconductivity. Copyright © 2017, The Authors. All rights reserved.

关键词： Quantum theory

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Junk code elimination based on idle object set

Junk code elimination based on idle object set

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International Conference on Information Science and Technology (ICIST)

作者： Wei Lin Jin-long Fei Rui-jie Cai State Key Laboratory of Mathematical Engineering and Advanced Computing China State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China

Junk code increase manual analysis difficulty in reverse engineering, and seriously disturb the automatic analysis process of ant code obfuscating, so find a junk code removing method has a great significance in the field of reverse engineering. Based on this, aiming at the problem that the executable context-dependent junk code is difficult to remove automatically, this paper proposes a junk code removing method based on idle register slicing, through analyzing data dependencies between instructions, get all the idle register of all instruction in code block, slice the code block by idle registers respectively, remove all the junk code in the slice instruction. Experiments show that, this method can remove embedded executable junk code rapidly and accurately, improve the efficiency of reverse engineering.

关键词：

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High performance porous iron oxide-carbon nanotube nanocomposite as an anode material for lithium-ion batteries

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Electrochimica Acta 2016年 212卷 179-186页

作者： Qian Lin Jie Wang Yijun Zhong Jaka Sunarso Moses O. Tadé Li Li Zongping Shao Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University No.5 Xin Mofan Road Nanjing 210009 PR China College of Chemical Engineering Nanjing Forestry University Nanjing 210037 PR China Faculty of Engineering Computing and Science Swinburne University of Technology Jalan Simpang Tiga 93350 Kuching Sarawak Malaysia Department of Chemical Engineering Curtin University Perth WA 6845 Australia Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) State Key Laboratory of Materials-Oriented Chemical Engineering College of Energy Nanjing Tech University No.5 Xin Mofan Road Nanjing 210009 PR China

Here, we showed that relatively high content of Fe 3 O 4 nanoparticles (up to 83 wt. %) can be homogeneously dispersed into carbon nanotubes (CNTs) conductive networks using non-aqueous media by refluxing method. Three different Fe 3 O 4 -CNTs composites were prepared, i.e., Fe 3 O 4 -CNTs-50, Fe 3 O 4 -CNTs-80 and Fe 3 O 4 -CNTs-90 that contain increasing amount of Fe 3 O 4 from 50 wt. % to 83 wt. % and to 89 wt. %. These composites have higher surface area and higher pore volume than Fe 3 O 4 component due to CNTs content. The best composite, i.e., Fe 3 O 4 -CNTs-80 demonstrated negligible capacity loss up to 100 cycles and high discharge capacity of 930 mA h g −1 at 100th cycle and 100 mA g −1 current discharge rate. This composite also exhibited excellent rate capability where up to the 78.8% of original capacity can be retained at high current discharge rate of 1000 mA g −1 . These performances were enabled by a unique porous architecture based on homogenous dispersion of Fe 3 O 4 nanoparticles into CNTs networks that leads to short Li + diffusion path, high electric conductivity and buffering space to accommodate large volume change of Fe 3 O 4 component during the charge-discharge processes.

关键词： Anode Carbon nanotubes Fe 3 O 4 High performance Lithium-ion batteries

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FPGA-Based Parallel Implementation of SURF Algorithm

FPGA-Based Parallel Implementation of SURF Algorithm

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International Conference on Parallel and Distributed Systems (ICPADS)

作者： Wenjie Chen Shuaishuai Ding Zhilei Chai Daojing He Weihua Zhang Guanhua Zhang Qiwei Peng Wang Luo MoE Engineering Research Center for Software/Hardware Co-design Technology and Application East China Normal University Shanghai China School of loT Engineering Jiangnan University Wuxi China State Key Laboratory of Mathematical Engineering and Advanced Computing Wuxi China Parallel Processing Institute Fudan University Shanghai China

ISBN: (纸本)9781509053827

SURF (Speeded up robust features) detection is used extensively in object detection, tracking and matching. However, due to its high complexity, it is usually a challenge to perform such detection in real time on a general-purpose processor. This paper proposes a parallel computing algorithm for the fast computation of SURF, which is specially designed for FPGAs. By efficiently exploiting the advantages of the architecture of an FPGA, and by appropriately handling the inherent parallelism of the SURF computation, the proposed algorithm is able to significantly reduce the computation time. Our experimental results show that, for an image with a resolution of 640x480, the processing time for computing using SURF is only 0.047 seconds on an FPGA (XC6SLX150T, 66.7 MHz), which is 13 times faster than when performed on a typical i3-3240 CPU (with a 3.4 GHz main frequency) and 249 times faster than when performed on a traditional ARM system (CortexTM-A8, 1 GHz).

关键词： Feature extraction Parallel processing Field programmable gate arrays Hardware Algorithm design and analysis Interpolation Real-time systems

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A novel genetic algorithm for constructing uniform test forms of cognitive diagnostic models

A novel genetic algorithm for constructing uniform test form...

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Congress on Evolutionary Computation

作者： Ye-shi Jiang Ying Lin Jing-Jing Li Zheng-jia Dai Jun Zhang Xinglin Zhang Ministry of Education Key Laboratory of Machine Intelligence - & Sensor Networks P.R. China School of Data & Computer Science Sun Yat-sen University School of Computer Science South China Normal University Department of Psychology Sun Yat-sen University State Key Laboratory of Mathematical Engineering and Advanced Computing School of Comouter Science & Engineering South China University of Technology

Cognitive diagnostic models (CDMs) are a new class of test models developed for educational assessment. They have gained growing attention in recent years for their distinctive ability to provide detailed feedback about examinees' ability. Automatic test assembly (ATA), as in other test models, has been one of the most critical issues in the development and applications of CDMs. However, developing ATA methods for CDMs is especially challenging because no close-form expressions can measure the quality of a test form based on the items used. Although some heuristic methods have been proposed for building a single test form of CDMs, few ATA methods can construct uniform test forms of CDMs, in which each test form contains a different set of items but meets equivalent demand of test quality. In order to fill the gap, this paper proposes a novel genetic algorithm (GA) for constructing uniform test forms of CDMs. The effectiveness and efficiency of the proposed method is validated on a synthetic item pool under different conditions.

关键词： Genetic algorithms Error analysis Biological cells Computational modeling Sociology Statistics Computer science

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An SIMD Code Generation Technology for Indirect Array

An SIMD Code Generation Technology for Indirect Array

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2015 7th International Conference on Computer Research and Development (ICCRD 2015)

作者： Peng-yuan Li Rong-cai Zhao Qing-hua Zhang Lin Han State Key Laboratory of Mathematical Engineering and Advanced Computing

Due to disjoint memory references and non-aligned memory references, existing SIMD compilers can't vectorize loops containing indirect array utilizing SIMD(Single Instruction Multiple Data) instructions. However, addressing this problem is inevitable, since many important applications extensively use this program pattern to reduce memory and computation requirement. In this paper, we propose a new efficient code generation technique for indirect array. For an irregular indirect array access, we adopt two separately registers to store the array base and the index address. It significantly contributes to the performance improvement by vectorizing more loops and reducing the overheads. We also developed this method in our auto-vectorization compiler SW-VEC. The experimental results show that the proposed method can translate applications within direct array access into high-performance targeted vectorized codes, thereby advancing the execution efficiency adequately.

关键词： Code generation Indirect array Vectorization

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