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作者： Jiang, Bo Dai, Yu-Hong State Key Laboratory of Scientific and Engineering Computing Institute of Computational Mathematics and Scientific/Engineering Computing Chinese Academy of Sciences Beijing 100190 China

This paper aims to study feasible Barzilai-Borwein (BB)-like methods for extreme symmetric eigenvalue problems. For the two-dimensional case, we establish the local superlinear convergence result of FLBB, FSBB, FABB, and FADBB algorithms. A counter-example is also given, showing that the algorithms may cycle or stop at a non-stationary point. In order to circumvent the difficulty, we propose a safeguard in choosing the stepsize. We also adopt an adaptive non-monotone line search with an improved line search to ensure the global convergence of AFBB-like methods. Numerical experiments on a set of test problems from UF Sparse Matrix Collection demonstrate that, comparing several available codes including eigs, irbleigs and jdcg, AFBB-like methods are very useful for large-scale sparse extreme symmetric eigenvalue problems. © 2013 Copyright Taylor and Francis Group, LLC.

关键词： Eigenvalues and eigenfunctions

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Improved low energy adaptive clustering hierarchy protocol based on local centroid bat algorithm

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Sensor Letters 2014年第9期12卷 1372-1377页

作者： Cao, Yang Cui, Zhihua Li, Feixiang Dai, Chaohua Chen, Weirong Complex System and Computational Intelligence Laboratory Taiyuan University of Science and Technology Shanxi China Key Laboratory of Intelligent Information Processing Institute of Computing Technology Chinese Academy of Sciences Beijing China School of Electric Engineering Southwest Jiaotong University Sichuan China

Bat algorithm (BA) is a novel intelligent optimization algorithm. In order to improve the poor local search capability of the algorithm, we present a new variant of bat optimization algorithm based on local centroid strategy (LCBA). Meanwhile, LEACH is a low energy adaptive clustering hierarchy algorithm for wireless sensor networks (WSN). And it has many disadvantages such as random selection of cluster head, taking no account of the remaining energy and position of nodes. To solve these problems, this paper proposes an improved LEACH protocol based on local centroid bat algorithm. The improved protocol divides the cluster head selection process into optimization of temporary cluster head and formal cluster head selection. First, we generate temporary cluster heads by traditional LEACH protocol, then optimize these cluster heads based on LCBA and select formal cluster heads according to the remaining energy of nodes. The result of experiment shows that, comparing with LEACH, LEACH-LCBA can balance the network load efficiently, improve the energy utilization, prolong the network lifetime.

关键词： Energy utilization

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Using artificial plant optimization algorithm with dynamic population and cluster methods to optimize the performance of DV-Hop

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Sensor Letters 2014年第8期12卷 1313-1317页

作者： Wu, Xuexue Cui, Zhihua Dai, Chaohua Chen, Weirong Complex System and Computational Intelligence Laboratory Taiyuan University of Science and Technology Shanxi China Key Laboratory of Intelligent Information Processing Institute of Computing Technology Chinese Academy of Sciences Beijing China School of Electric Engineering Southwest Jiaotong University Sichuan China

Artificial plant optimization algorithm is a novel stochastic population-based evolutionary algorithm by simulating the plant growing process. In this paper, a new variant, which is called APOA-DC is proposed by incorporating with dynamic population size and cluster methods, furthermore, to investigate the performance, APOA-DC is applied to optimize the DV-Hop localization algorithm, simulation results show it achieves better performance than the DV-Hop algorithm.

关键词： Evolutionary algorithms

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A Posteriori Error Estimates of a Combined Mixed Finite Element and Discontinuous Galerkin Method for a Kind of Compressible Miscible Displacement Problems

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Advances in Applied mathematics and Mechanics 2013年第2期5卷 163-179页

作者： Jiming Yang Zhiguang Xiong College of Science Hunan Institute of EngineeringXiangtan 411104HunanChina School of Mathematics and Computational Science Hunan University of Science and TechnologyXiangtan 411201HunanChina

Akind of compressiblemiscible displacement problemswhich includemolecular diffusion and dispersion in porous media are *** mixed finite element method is applied to the flow equation,and the transport one is solved by the symmetric interior penalty discontinuous Galerkin *** on a duality argument,employing projection estimates and approximation properties,a posteriori residual-type hp error estimates for the coupled system are presented,which is often used for guiding *** with the error analysis carried out by Yang(***,65(7)(2011),pp.781-797),the current work is more complicated and challenging.

关键词： A posteriori error discontinuous Galerkin method compressible miscible displacement mixed finite element duality argument

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A new bidimensional EMD algorithmand its applications

A new bidimensional EMD algorithmand its applications

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International Symposium on Communication Systems, Networks and Digital Signal Processing, CNSDSP

作者： Zhijing Yang Jianmin Jiang Lihua Yang Chunmei Qing Bingo Wing-Kuen Ling Qingyun Dai School of Information Engineering Guangdong University of Technology Guangzhou China Department of Computing University of Surrey United Kingdom School of Computer Science&Technology Tianjin University China School of Mathematics and Computational Science Sun Vat-sen University China School of Electronic and Information Engineering South China University of Technology China

Empirical mode decomposition (EMD) is a powerful tool for analysis of non-stationaryand nonlinear signals, and has drawn significant attention in various engineeringapplication areas. This paper presents a new bidimensional EMD based on the adaptive anisotropic triangulations. Specifically, we define the local mean surface of the data, which is a key step in bidimensional EMD, by a locally weighted mean filter with variable window sizes that are determined by the adaptive anisotropic triangulations. Numerical experiments show that the proposed method achieves effective empirical mode decomposition for 2D signals.

关键词： Empirical mode decomposition Finite element analysis Educational institutions Approximation methods Algorithm design and analysis Communication systems Filtering algorithms

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Sliding mode H∞ control for chaotic gyros with external disturbance

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ICIC Express Letters, Part B: Applications 2014年第3期5卷 677-682页

作者： Fu, Xiuli Dai, Bo Liu, Heng College of Information Engineering Beijing Institute of Petrochemical Technology No. 19 Qingyuanbei Road Daxing District Beijing 102617 China Department of Mathematics and Computational Science Huainan Normal University Dongshanxi Road Tianjiaan District Huainan 232038 China

This paper investigates sliding mode H∞ control for chaotic gyros in the presence of unknown disturbance. Based on Lypunov stability theory, a sliding mode H∞ controller is designed. The proposed method can guarantee the boundedness of the closed-loop system, finite-time reachability of the sliding surface, as well as some H∞ performance. Finally, simulation studies are carried out to show the effectiveness of the proposed method. © 2014 ICIC International.

关键词： Sliding mode control

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μs isomers of Nd158,160

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Physical Review C 2016年第6期94卷 064322-064322页

作者： E. Ideguchi G. S. Simpson R. Yokoyama Mn. Tanaka S. Nishimura P. Doornenbal G. Lorusso P.-A. Söderström T. Sumikama J. Wu Z. Y. Xu N. Aoi H. Baba F. L. Bello Garrote G. Benzoni F. Browne R. Daido Y. Fang N. Fukuda A. Gottardo G. Gey S. Go N. Inabe T. Isobe D. Kameda K. Kobayashi M. Kobayashi I. Kojouharov T. Komatsubara T. Kubo N. Kurz I. Kuti Z. Li M. Matsushita S. Michimasa C.-B. Moon H. Nishibata I. Nishizuka A. Odahara Z. Patel S. Rice E. Sahin H. Sakurai H. Schaffner L. Sinclair H. Suzuki H. Takeda J. Taprogge Zs. Vajta H. Watanabe A. Yagi Research Center for Nuclear Physics (RCNP) Osaka University Ibaraki Osaka 567-0047 Japan LPSC Université Joseph Fourier Grenoble 1 CNRS/IN2P3 Institut National Polytechnique de Grenoble F-38026 Grenoble Cedex France School of Engineering University of the West of Scotland Paisley PA1 2BE United Kingdom Scottish Universities Physics Alliance University of Glasgow Glasgow G12 8QQ United Kingdom Center for Nuclear Study (CNS) University of Tokyo Wako-shi Saitama 351-0198 Japan RIKEN Nishina Center RIKEN 2-1 Hirosawa Wako-shi Saitama 351-0198 Japan Department of Physics Tohoku University Aoba Sendai Miyagi 980-8578 Japan School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 China Department of Physics University of Tokyo Hongo Bunkyo-ku Tokyo 113-0033 Japan Department of Physics University of Oslo Oslo Norway INFN Sezione di Milano I-20133 Milano Italy School of Computing Engineering and Mathematics University of Brighton Brighton BN2 4JG United Kingdom Department of Physics Osaka University Machikaneyama-machi 1-1 Osaka 560-0043 Toyonaka Japan Dipartimento di Fisica dellUniversità degli Studi di Padova I-35131 Padova Italy INFN Laboratori Nazionali di Legnaro Legnaro I-35020 Italy Institut Laue-Langevin B.P. 156 F-38042 Grenoble Cedex 9 France Department of Physics Rikkyo University 3-34-1 Nishi-Ikebukuro Toshima-ku Tokyo 171-8501 Japan GSI Helmholtzzentrum für Schwerionenforschung GmbH 64291 Darmstadt Germany Research Facility Center for Pure and Applied Science University of Tsukuba Ibaraki 305-8577 Japan Rare Isotope Science Project Institute for Basic Science Daejeon 305-811 Korea MTA Atomki P. O. Box 51 Debrecen H-4001 Hungary Hoseo University Asan Chungnam 336-795 Korea Department of Physics University of Surrey Guildford GU2 7XH United Kingdom Department of Physics University of York Heslington York YO10 5DD United Kingdom Instituto de Estructura de la Materia CSIC E-2

The neutron-rich nuclei Nd158,160 have been studied via delayed γ-ray spectroscopy of μs isomeric states at the RIBF facility, RIKEN. These nuclei were produced following the projectile fission of a 345 AMeVU238 beam and delayed γ rays were detected by the EURICA cluster Ge array. The isomeric states have measured half-lives of 339(20) ns and 1.63(21) μs for Nd158 and Nd160, respectively. From the observed γ decays and the systematics of levels in the neighboring Nd isotopes first level schemes were constructed for these nuclei. The isomeric states of Nd158,160 have been assigned spins of (6−) and (4−), with proposed ν5/2[523]⊗ν7/2[633] and ν1/2[521]⊗ν7/2[633] configurations, respectively.

关键词： Electromagnetic transitions Isomer decays Lifetimes & widths Nuclear structure & decays 150 ≤ A ≤ 189

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Variation of implosion asymmetry with hohlraum length and timein indirect-drive Inertial Confinement Fusion

Variation of implosion asymmetry with hohlraum length and ti...

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The 2nd International Conference on High Energy Density Physics,Beijing,China

作者： H.Li Y.D.Pu L.F.Jing Z.W.Lin B.L.Chen W.Jiang J.Y.Zhou T.X.Huang H.Y.Zhang R.Z.Yu J.Y.Zhang W.Y.Miao Z.J.Zheng Z.R.Cao J.M.Yang S.Y.Liu S.E.Jiang Y.K.Ding L.Y.Kuang G.Y.Hu J.Zheng C.S.Wu Y.Q.Zhao J.F.Gu D.G Kang K.Lan Research Center of Laser Fusion China Academy of Engineering Physics CAS Key Laboratory of Basic Plasma Physics and Department of Modern Physics University of Science and Technology of China Institute of Applied Physics and Computational Mathematics

In order to achieve the high density compression in laser indirect-drive inertial confinement fusion,the implosion symmetry and hohlraum radiation uniformity are strictly *** study the variations of implosion asymmetry with hohlraum length and time,three kinds of hohlraum lengths are adopted in experiment.X-ray emission from capsule fuel is measured by an X-ray framing *** on measured

关键词： Variation of implosion asymmetry with hohlraum length and timein indirect-drive Inertial Confinement Fusion

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One variant of a （2 ＋ 1）-dimensional Volterra system and its （1 ＋ 1）-dimensional reduction

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Frontiers of mathematics in China 2013年第5期8卷 1085-1097页

作者： Yingnan ZHANG Yi HE Hon-Wah TAM LSEC Institute of Computational Mathematics and Scientific Engineering ComputingAcademy of Mathematics and System Sciences Chinese Academy of SciencesBeijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China Wuhan Institute of Physics and Mathematics Chinese Academy of Sciences Wuhan 430071 China Department of Computer Science Hong Kong Baptist University Hong Kong China

A new system is generated from a multi-linear form of a （2＋1）- dimensional Volterra system. Though the system is only partially integrable and needs additional conditions to possess two-soliton solutions, its （1＋1）- dimensional reduction gives an integrable equation which has been studied via reduction skills. Here, we give this （1＋1）-dimensional reduction a simple bilinear form, from which a Backlund transformation is derived and the corresponding nonlinear superposition formula is built.

关键词： Integrability soliton solution Bgcklund transformation （BT）,nonlinear superposition formula

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A Cone Constrained Convex Program:Structure and Algorithms

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Journal of the Operations Research Society of China 2013年第1期1卷 37-53页

作者： Liqun Qi Yi Xu Ya-Xiang Yuan Xinzhen Zhang Department of Applied Mathematics The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina State Key Laboratory of Scientific/Engineering Computing Institute of Computational Mathematics and Scientific/Engineering ComputingAMSSChinese Academy of SciencesZhong Guan Cun Donglu 55Beijing100190P.R.China Department of Mathematics School of ScienceTianjin UniversityTianjin300072China

In this paper,we consider the positive semi-definite space tensor cone constrained convex program,its structure and *** study defining functions,defining sequences and polyhedral outer approximations for this positive semidefinite space tensor cone,give an error bound for the polyhedral outer approximation approach,and thus establish convergence of three polyhedral outer approximation algorithms for solving this *** then study some other approaches for solving this structured convex *** include the conic linear programming approach,the nonsmooth convex program approach and the bi-level program *** numerical examples are presented.

关键词： Convex program Space tensor Positive semi-definiteness Cone Algorithms

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