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Parallel constraint solution method combining search and consistency

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) 2013年第SUPPL.2期44卷 268-272页

作者： Cao, Yan Wang, Qingxian Wei, Qiang Yin, Zhongxu State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou 450001 China

Due to continuous development of multi-core hardware architectures, how to make time-consuming constraint solution have the ability of running in parallel is particularly important. Based on analyzing the relation between backtracking search and consistency technology, the constraint solution method combing parallel search and parallel consistency was proposed. In parallel consistency, a centralized storage-based parallel consistency model was proposed for global constraints to cut off the search space and optimize the search process. The division of search space was studied. Scheduling search space into different processors ensures disjoint and complete in parallel search. The experiments represent that the method is feasible and has higher speedup.

关键词： Consistency Constraint solution Parallelization Search

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A flag simulation strategy based on fusion of semantic trees in binary translation

A flag simulation strategy based on fusion of semantic trees...

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International Conference on Fuzzy Systems and Knowledge Discovery (FSKD)

作者： Xiaonan Liu Rongcai Zhao Jianmin Pang Meijuan Yin Lili Bai Wuping Chen State Key Laboratory or Mathematics Engineering and Advanced Computing Zhengzhou China Science and Technology on Information Assurance Laboratory Beijing China

ISBN: (纸本)9781467352512

Binary translation is the emulation of one instruction set by another through translation of code. Sequences of instructions are translated from the source to the target instruction set. The semantic equivalence conversion of instructions is the core of a binary translation system. In order to simulate the behavior of a program on the target platform more accurately, the change of the special state register must be exactly simulated. A flag register simulation strategy based on fusion of semantic trees is presented in this paper. First, it is determined whether the instructions meet some special conditions by the relations among instruction semantic trees. Then these instructions will be fused if the conditions are met. Finally, binary translation is carried out on the fused instructions. The experimental results show that the proposed binary translation strategy is effective. The strategy can not only reduce the problem of code inflation, but also improve the execution efficiency of the translated code.

关键词： Semantics Vegetation Optimization Registers Software Linux Computers

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An improved affinity propagation clustering algorithm for large-scale data sets

An improved affinity propagation clustering algorithm for la...

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International Conference on Natural Computation (ICNC)

作者： Xiaonan Liu Meijuan Yin Junyong Luo Wuping Chen State Key Laboratory or Mathematics Engineering and Advanced Computing Zhengzhou China Science and Technology on Information Assurance Laboratory Beijing China

Affinity Propagation (AP) clustering does not need to set the number of clusters, and has advantages on efficiency and accuracy, but is not suitable for large-scale data clustering. To ensure both a low time complexity and a good accuracy for the clustering method of affinity propagation on large-scale data clustering, an improved AP clustering algorithm named hierarchical affinity propagation (HAP) is proposed, which clusters data points by using AP algorithm several times on different level data. The data set to be clustered is firstly divided into several subsets, each of which can be efficiently clustered by AP algorithm. Then, the AP algorithm is performed on each subset to respectively select cluster centers of each subset. Further, AP clustering was again implemented on all the local cluster centers to select well-suited global exemplars of whole data set. Finally, to efficiently and accurately cluster data points in a large-scale, all the data points are clustered by the similarities between each data point and the global exemplars. The experimental results on real and simulated data sets show that, compared with the traditional AP and adaptive AP algorithm, the HAP algorithm can greatly reduce the clustering time consumption with a relatively better clustering results.

关键词： Clustering algorithms Partitioning algorithms Algorithm design and analysis Indexes Memory management Availability Computers

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Network backbone anomaly detection using double random forests based on non-extensive entropy feature extraction

Network backbone anomaly detection using double random fores...

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International Conference on Natural Computation (ICNC)

作者： Meijuan Yin Dong Yao Junyong Luo Xiaonan Liu Jing Ma State Key Laboratory or Mathematics Engineering and Advanced Computing Zhengzhou China Science and Technology on Information Assurance Laboratory Beijing China

This paper proposed an anomaly detection method that can be used in high speed network backbone. To adapt for the need of online cost-sensitive data processing, some of the attributes are extracted from the header of packets and recorded by sketching in a fixed time window. Based on non-extensive entropy with different parameters, the original distribution of the values of attributes is decomposed to high dimensional features to enlarge the characteristics of the small amount of anomaly data hidden in the large amount of normal data. Using these extracted detailed features, the detection model based on random forest is constructed. For the purpose of increasing detection accuracy and recall further, the second random forest detection model is constructed with the anomaly instances only. The experimental results suggest that proposed anomaly detection method can achieve competitive detection accuracy with a high recall.

关键词： Entropy Feature extraction Vectors Vegetation Intrusion detection Training Laboratories

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Interlayer vibrational modes in few-quintuple-layer Bi2Te3 and Bi2Se3 two-dimensional crystals: Raman spectroscopy and first-principles studies

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Physical Review B 2014年第24期90卷 245428-245428页

作者： Yanyuan Zhao Xin Luo Jun Zhang Junxiong Wu Xuxu Bai Meixiao Wang Jinfeng Jia Hailin Peng Zhongfan Liu Su Ying Quek Qihua Xiong Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore Institute of High Performance Computing 1 Fusionopolis Way #16-16 Connexis Singapore 138632 Singapore Department of Physics Centre for Advanced 2D Materials and Graphene Research Centre National University of Singapore 6 Science Drive 2 Singapore 117546 Singapore Center for Nanochemistry Beijing National Laboratory for Molecular Sciences (BNLMS) College of Chemistry and Molecular Engineering Peking University Beijing 100871 People's Republic of China Department of Physics Key Laboratory of Artificial Structures and Quantum Control Ministry of Education Shanghai Jiao Tong University Shanghai 200240 People's Republic of China NOVITAS Nanoelectronics Centre of Excellence School of Electrical and Electronic Engineering Nanyang Technological University Singapore 639798 Singapore

Layered materials, such as graphite/graphene, boron nitride, transition metal dichalcogenides, represent materials in which reduced size, dimensionality, and symmetry play critical roles in their physical properties. Here, we report on a comprehensive investigation of the phonon properties in the topological insulator Bi2Te3 and Bi2Se3 two-dimensional (2D) crystals, with the combination of Raman spectroscopy, first-principles calculations, and group theory analysis. Low frequency (<30cm−1) interlayer vibrational modes are revealed in few-quintuple-layer (QL) Bi2Te3/Bi2Se3 2D crystals, which are absent in the bulk crystal as a result of different symmetries. The experimentally observed interlayer shear and breathing mode frequencies both show blueshifts, with decreasing thickness in few-QL Bi2Te3 (down to 2QL) and Bi2Se3 (down to 1QL), in agreement with first-principles calculations and a linear chain model, from which the interlayer coupling force constants can be estimated. Besides, an intense ultralow (<12cm−1) frequency peak is observed in 2–4QL Bi2Te3, which is tentatively attributed to a substrate-induced interface mode supported by a linear chain model analysis. The high frequency Raman peaks exhibit frequency shifts and broadening from 3D to 2D as a result of the phonon confinement effect. Our studies shed light on a general understanding of the influence of dimensionality and crystal symmetry on the phonon properties in layered materials.

关键词： RAMAN spectroscopy GROUP theory CRYSTAL symmetry GRAPHITE BORON nitride TRANSITION metals PHONONS

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Parallelizing Sparse LU Decomposition on FPGAs

Parallelizing Sparse LU Decomposition on FPGAs

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11th International Conference on Field-Programmable Technology (FPT)

作者： Wu, Guiming Xie, Xianghui Dou, Yong Sun, Junqing Wu, Dong Li, Yuan State Key Laboratory of Mathematical Engineering and Advanced Computing China

ISBN: (纸本)9781467328463;9781467328449

Sparse LU decomposition is the core computation in the direct method that solves sparse systems of linear equations. Only little work has been conducted on parallelizing it on FPGAs. In this paper, we study parallelization strategies for sparse LU decomposition on FPGAs. We first analyze how to parallelize the right-looking algorithm and find that this algorithm is not suitable for FPGAs. Then the left-looking algorithm is analyzed and considered as better candidate than the right-looking version. Our design derived from the left-looking algorithm is based on a simple yet efficient parallel computational model for FPGAs. Our design mainly consists of multiple parallel processing elements (PEs). A total of 14 PEs can be integrated into a Xilinx Virtex-5 XC5VLX330. Unlike related work, where their designs are applied to sparse matrices from particular application domains, our hardware design can be applied to any symmetric positive definite or diagonally dominant matrices.

关键词： Sparse matrices Random access memory Algorithm design and analysis Parallel processing Field programmable gate arrays Matrix decomposition Hardware

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A secret enriched visual cryptography

A secret enriched visual cryptography

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11th International Workshop on Digital Forensics and Watermaking, IWDW 2012

作者： Liu, Feng Yan, Wei Q. Li, Peng Wu, Chuankun State Key Laboratory of Information Security Institute of Information Engineering Chinese Academy of Sciences Beijing 100093 China School of Computing and Mathematical Sciences Auckland University of Technology 1142 New Zealand Department of Mathematics and Physics North China Electric Power University Baoding Hebei 071003 China

ISBN: (纸本)9783642400988

Visual Cryptography (VC) is a powerful technique that combines the notions of perfect ciphers and secret sharing in cryptography with that of raster graphics. A binary image can be divided into shares that are able to be stacked together so as to approximately recover the original image. VC is a unique technique in the sense that the encrypted message can be decrypted directly by the Human Visual System (HVS). The distinguishing characteristic of VC is the ability of secret restoration without the use of computation. However because of restrictions of the HVS, pixel expansion and alignment problems, a VC scheme perhaps can only be applied to share a small size of secret image. In this paper, we propose a general method to let the VC shares carry more secrets, the technique is to use cypher output of private-key systems as the input random numbers of VC scheme, meanwhile the encryption key could be shared, the shared keys could be associated with the VC shares. After this operation, VC scheme and secret sharing scheme are merged with the private-key system. Under this design, we implement a (k,t,n)-VC scheme. Compared to those existing schemes, our approach could greatly enhance the ability of current VC schemes and could cope with pretty rich secrets. © 2013 Springer-Verlag.

关键词： Binary images

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Information Transfer Model of Virtual Machine Based on Storage Covert Channel

Information Transfer Model of Virtual Machine Based on Stora...

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第七届中国可信计算与信息安全学术会议

作者： WANG Xiaorui WANG Qingxian GUO Yudong LU Jianping Fourth Department PLA Information Engineering UniversityZhengzhou 450002HenanChina State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou 450002HenanChina Department of Communication Command Chongqing Communication InstituteChongqing 400035China

Aiming at the problem that virtual machine information cannot be extracted incompletely, we extend the typical informa tion extraction model of virtual machine and propose a perception mechanism in virtualization system based on storage covert chan nel to overcome the affection of the semantic *** advan tage of undetectability of the covert channel, a secure channel is established between Guest and virtual machine monitor to pass data *** Guest machine can pass the control information of malicious process to virtual machine monitor by using the VMCALL instruction and shared *** parsing critical information in process control structure, virtual machine monitor can terminate the malicious *** test results show that the proposed mechanism can clear the user-level malicious pro grams in the virtual machine effectively and ***,its performance overhead is about the same as that of other main stream monitoring mode.

关键词： virtualization safety protection information extraction of virtual machine covert channel process control structure

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Study of [Formula: see text] and [Formula: see text] production in [Formula: see text] collisions at [Formula: see text] and search for anomalous quartic gauge couplings with the ATLAS experiment

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The European physical journal. C, Particles and fields 2017年第9期77卷 646页

作者： M Aaboud G Aad B Abbott O Abdinov B Abeloos S H Abidi O S AbouZeid N L Abraham H Abramowicz H Abreu R Abreu Y Abulaiti B S Acharya S Adachi L Adamczyk J Adelman M Adersberger T Adye A A Affolder T Agatonovic-Jovin C Agheorghiesei J A Aguilar-Saavedra S P Ahlen F Ahmadov G Aielli S Akatsuka H Akerstedt T P A Åkesson E Akilli A V Akimov G L Alberghi J Albert P Albicocco M J Alconada Verzini S C Alderweireldt M Aleksa I N Aleksandrov C Alexa G Alexander T Alexopoulos M Alhroob B Ali M Aliev G Alimonti J Alison S P Alkire B M M Allbrooke B W Allen P P Allport A Aloisio A Alonso F Alonso C Alpigiani A A Alshehri M I Alstaty B Alvarez Gonzalez D Álvarez Piqueras M G Alviggi B T Amadio Y Amaral Coutinho C Amelung D Amidei S P Amor Dos Santos S Amoroso G Amundsen C Anastopoulos L S Ancu N Andari T Andeen C F Anders J K Anders K J Anderson A Andreazza V Andrei S Angelidakis I Angelozzi A Angerami A V Anisenkov N Anjos A Annovi C Antel M Antonelli A Antonov D J Antrim F Anulli M Aoki L Aperio Bella G Arabidze Y Arai J P Araque V Araujo Ferraz A T H Arce R E Ardell F A Arduh J-F Arguin S Argyropoulos M Arik A J Armbruster L J Armitage O Arnaez H Arnold M Arratia O Arslan A Artamonov G Artoni S Artz S Asai N Asbah A Ashkenazi L Asquith K Assamagan R Astalos M Atkinson N B Atlay K Augsten G Avolio B Axen M K Ayoub G Azuelos A E Baas M J Baca H Bachacou K Bachas M Backes M Backhaus P Bagnaia M Bahmani H Bahrasemani J T Baines M Bajic O K Baker E M Baldin P Balek F Balli W K Balunas E Banas A Bandyopadhyay Sw Banerjee A A E Bannoura L Barak E L Barberio D Barberis M Barbero T Barillari M-S Barisits J T Barkeloo T Barklow N Barlow S L Barnes B M Barnett R M Barnett Z Barnovska-Blenessy A Baroncelli G Barone A J Barr L Barranco Navarro F Barreiro J Barreiro Guimarães da Costa R Bartoldus A E Barton P Bartos A Basalaev A Bassalat R L Bates S J Batista J R Batley M Battaglia M Bauce F Bauer H S Bawa J B Beacham M D Beattie T Beau P H Beauchemin P Bechtle H P Beck H C Beck K Becker M Becker M Beckingham C Becot A J Beddall A Beddall Faculté des Sciences Université Mohamed Premier and LPTPM Oujda Morocco. CPPM Aix-Marseille Université and CNRS/IN2P3 Marseille France. Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman OK USA. Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan. LAL Univ. Paris-Sud CNRS/IN2P3 Université Paris-Saclay Orsay France. Department of Physics University of Toronto Toronto ON Canada. Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz CA USA. Department of Physics and Astronomy University of Sussex Brighton UK. Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel. Department of Physics Technion: Israel Institute of Technology Haifa Israel. Center for High Energy Physics University of Oregon Eugene OR USA. Department of Physics Stockholm University Stockholm Sweden. The Oskar Klein Centre Stockholm Sweden. INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy. ICTP Trieste Italy. International Center for Elementary Particle Physics and Department of Physics The University of Tokyo Tokyo Japan. Faculty of Physics and Applied Computer Science AGH University of Science and Technology Kraków Poland. Department of Physics Northern Illinois University DeKalb IL USA. Fakultät für Physik Ludwig-Maximilians-Universität München Munich Germany. Particle Physics Department Rutherford Appleton Laboratory Didcot UK. Institute of Physics University of Belgrade Belgrade Serbia. Department of Physics Alexandru Ioan Cuza University of Iasi Iasi Romania. Laboratório de Instrumentação e Física Experimental de Partículas-LIP Lisbon Portugal. Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada Spain. Department of Physics Boston University Boston MA USA. Joint Institute for Nuclear Research JINR Dubna Dubna Russia. INFN Sezione di Roma Tor Vergata Rome Italy. Dipartimento di Fisica Università di Roma

This paper presents a study of and triboson production using events from proton-proton collisions at a centre-of-mass energy of recorded with the ATLAS detector at the LHC and corresponding to an integrated luminosity of 20.2 fb . The production cross-section is determined using a final state containing an electron, a muon, a photon, and neutrinos ( ). Upper limits on the production cross-section of the final state and the and final states containing an electron or a muon, two jets, a photon, and a neutrino ( or ) are also derived. The results are compared to the cross-sections predicted by the Standard Model at next-to-leading order in the strong-coupling constant. In addition, upper limits on the production cross-sections are derived in a fiducial region optimised for a search for new physics beyond the Standard Model. The results are interpreted in the context of anomalous quartic gauge couplings using an effective field theory. Confidence intervals at 95% confidence level are derived for the 14 coupling coefficients to which and production are sensitive.

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β decay of Cd129 and excited states in In129

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Physical Review C 2015年第5期91卷 054324-054324页

作者： J. Taprogge A. Jungclaus H. Grawe S. Nishimura P. Doornenbal G. Lorusso G. S. Simpson P.-A. Söderström T. Sumikama Z. Y. Xu H. Baba F. Browne N. Fukuda R. Gernhäuser G. Gey N. Inabe T. Isobe H. S. Jung D. Kameda G. D. Kim Y.-K. Kim I. Kojouharov T. Kubo N. Kurz Y. K. Kwon Z. Li H. Sakurai H. Schaffner K. Steiger H. Suzuki H. Takeda Zs. Vajta H. Watanabe J. Wu A. Yagi K. Yoshinaga G. Benzoni S. Bönig K. Y. Chae L. Coraggio A. Covello J.-M. Daugas F. Drouet A. Gadea A. Gargano S. Ilieva F. G. Kondev T. Kröll G. J. Lane A. Montaner-Pizá K. Moschner D. Mücher F. Naqvi M. Niikura H. Nishibata A. Odahara R. Orlandi Z. Patel Zs. Podolyák A. Wendt Instituto de Estructura de la Materia CSIC E-28006 Madrid Spain Departamento de Física Teórica Universidad Autónoma de Madrid E-28049 Madrid Spain RIKEN Nishina Center RIKEN 2-1 Hirosawa Wako-shi Saitama 351-0198 Japan GSI Helmholtzzentrum für Schwerionenforschung GmbH 64291 Darmstadt Germany National Physical Laboratory NPL Teddington Middlesex TW11 0LW United Kingdom Department of Physics University of Surrey Guildford GU2 7XH United Kingdom LPSC Université Joseph Fourier Grenoble 1 CNRS/IN2P3 Institut National Polytechnique de Grenoble F-38026 Grenoble Cedex France Department of Physics Tohoku University Aoba Sendai Miyagi 980-8578 Japan Department of Physics University of Tokyo Hongo 7-3-1 Bunkyo-ku 113-0033 Tokyo Japan School of Computing Engineering and Mathematics University of Brighton Brighton BN2 4JG United Kingdom Physik Department E12 Technische Universität München D-85748 Garching Germany Institut Laue-Langevin B.P. 156 F-38042 Grenoble Cedex 9 France Department of Physics Chung-Ang University Seoul 156-756 Republic of Korea Rare Isotope Science Project Institute for Basic Science Daejeon 305-811 Republic of Korea Department of Nuclear Engineering Hanyang University Seoul 133-791 Republic of Korea School of Physics and State key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 China MTA Atomki P.O. Box 51 Debrecen H-4001 Hungary Department of Physics Osaka University Machikaneyama-machi 1-1 Osaka 560-0043 Toyonaka Japan Department of Physics Faculty of Science and Technology Tokyo University of Science 2641 Yamazaki Noda Chiba Japan INFN Sezione di Milano via Celoria 16 I-20133 Milano Italy Institut für Kernphysik Technische Universität Darmstadt D-64289 Darmstadt Germany Department of Physics Sungkyunkwan University Suwon 440-746 Republic of Korea Istituto Nazionale di Fisica Nucleare Complesso Universitario di Monte S. Angelo I-80126 Napoli Italy Dipartimento di Fisica Università di Napo

The β decay of Cd129, produced in the relativistic fission of a U238 beam, was experimentally studied at the RIBF facility at the RIKEN Nishina Center. From the γ radiation emitted after the β decays, a level scheme of In129 was established comprising 31 excited states and 69 γ-ray transitions. The experimentally determined level energies are compared to state-of-the-art shell-model calculations. The half-lives of the two β-decaying states in Cd129 were deduced and the β feeding to excited states in In129 were analyzed. It is found that, as in most cases in the Z<50, N≤82 region, both decays are dominated by the ν0g7/2→π0g9/2 Gamow–Teller transition, although the contribution of first-forbidden transitions cannot be neglected.

关键词： CADMIUM isotopes INDIUM isotopes PARTICLE decays EXCITED states NUCLEAR fusion

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