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Energy dependence of non-linear dynamical features in e^+e^- collisions

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Chinese Physics C 2008年第7期32卷 552-555页

作者：李迪开陈刚魏会领 department of Physics College of Maths and PhysicsChina University of GeosciencesWuhan 430074China

A study of the dynamical fluctuation properties at various c.m. energies in e^＋e^- collisions is performed using the Monte Carlo method. The results suggest that, after the normalized factorial moments of 3-dimensional phase space are analyzed using an isotropical phase space partition, the NFM describing non- linear dynamical properties show a power-law scaling, i.e., the dynamical fluctuations in higher dimensional phase space are isotropic. For c.m. energies √s≤ 80 GeV, the scaling exponents φq increase rapidly with the c.m. energy and for c.m. energies √s 〉 80 GeV, the φq gradually saturate.

关键词： e^+e^- collisions non-linear dynamical property factorial moments energy dependence

Appearance of metallic features in small tungsten clusters

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Chinese Physics B 2009年第6期18卷 2264-2270页

作者：雷雪玲王先明祝恒江罗有华 School of maths-Physics and Information Sciences Xinjiang Normal University department of Physics East China University of Science and Technology

The structures and properties of Wn （n = 2-14） clusters were studied by using the density functional theory （DFT） at LSDA level. The most stable structures of Wn （n = 2-14） clusters with global minimum were determined. The average binding energy （Eb）, the first and second difference of total energy （△E, △2E）, the vertical detachment energy （VDE）, and the HOMO-LUMO gap versus the size were also discussed. The abrupt decrease of VDE and HOMO-LUMO gap at size n = 8 and 10 implied that tungsten clusters of W8 and W10 appeared to have metallic features. These changes were also accompanied by the delocalization of electron charge density and the strong hybridization between 5d and 6s orbits in W8 and W10 clusters. Our results are in good agreement with the available experimental data.

关键词： Wn clusters density functional theory lowest-energy structures metallic features

Diffusion Dynamics of Cux Cluster on Cu（111） Surface

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Chinese Journal of Chemical Physics 2008年第1期21卷 27-31页

作者： Jian-feng Tang Mai-chang Xu Xue-song Li Wo-yun Long department of Applied Physics Hunan Agricultural University Changsha 410128 China department of maths and Physics Hunan Institute of Engineering Xiangtan 411104 China

The diffusion dynamics of small two-dimensional atomic clusters Cux （1≤x≤8） on Cu（lll） surface were studied using the molecular dynamics simulations and a modified analytic embedded-atom method in the temperature range from 200 K to 800 K. The cluster size and temperature dependence of the diffusion coefficients and migration energies are presented. Our simulations show that the diffusion migration energy of the CuT cluster is the highest and the prefactor for the CuT cluster is almost three orders of magnitude larger than that for single atom diffusion. This conclusion is consistent with the experimental results for similar metals. In addition, the dependence of cluster diffusion on film growth is also discussed.

关键词： Cluster Molecular dynamics Surface diffusion

Electric-Current-Induced Heat Generation in Kondo Regime

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Communications in Theoretical Physics 2010年第7期54卷 171-174页

作者：陈桥张亚民 department of maths and Physics Hunan Institute of Engineering North College of Beijing University of Chemical Technology

Using the nonequilibrium Green's function technique,we investigate the current induced heat generationin Kondo *** Kondo effect influences the heat generation *** the curve of heat generation versusthe bias,a negative differential of the heat generation is *** symmetry of the heat generation is destroyed bythe strong electron-electron interaction and the electron-phonon interaction.

关键词： heat generation Kondo effect quantum dot nonequilibrium Green's function

STRONG CONSISTENCY OF M ESTIMATOR IN LINEAR MODEL FOR NEGATIVELY ASSOCIATED SAMPLES

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Journal of Systems Science & Complexity 2006年第4期19卷 592-600页

作者： Qunying WU department of maths and Physics Guilin University of Technology Ouilin 541004 China.

This paper discusses the strong consistency of M estimator of regression parameter in linear model for negatively associated samples. As a result, the author extends Theorem 1 and Theorem 2 of Shanchao YANG （2002） t... 详细信息

关键词： Linear model M estimator negatively associated sample strong consistency.

Conservation Laws and Self-Consistent Sources for a Super-Classical-Boussinesq Hierarchy

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Chinese Physics Letters 2011年第12期28卷 1-4页

作者： YU Fa-Jun College of maths and Systematic Science Shenyang Normal UniversityShenyang 110034

The super-classical-Boussinesq hierarchy with self-consistent sources is ***,infinitely many conservation laws for the integrable super-classical-Boussinesq hierarchy are established.

关键词： Boussinesq infinitely integrable

Hawking Tunneling Radiation of Black Holes in Deformed Horava-Lifshitz Gravity

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Communications in Theoretical Physics 2011年第2期55卷 376-380页

作者：曾晓雄李玲 Journal of Sichuan University of Arts and Science department of maths and Finance-Economics Sichuan University of Arts and Science

Tunneling of scalar particles and Dirac particles from a black hole in the deformed Horava-Lifshitz gravity is discussed in this paper. We consider the case that the dynamical coupling constant λ= 1, when it reduces to Einstein＇s General Relativity at large scales and the black hole behaves like the Reissner-Nordstr6m black hole. The result shows that though the black hole entropy bears logarithmic correction, the tunneling probability is still related to its differences for the scalar particles and Dirac particles.

关键词： Horava-Lifshitz gravity tunneling black hole entropy

Microwave Absorption Studies of M-Type Ferrite Doped with Lanthanum Prepared by Citric Acid Sol-Gel

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Journal of Rare Earths 2006年第S2期 25-28页

作者：刘学东卢佃清徐超周朕 Lianyungang 222005 China department of maths and Physics Huaihai Institute of Technology department of maths and Physics Huaihai Institute of Technology

M type hexagonal ferrite (La0.5K0.5)xBa1-xFe12O19 (x=0.0, 0.1, 0.3, 0.5) doped with Lanthanum were synthesized through a citric acid sol-gel auto-combustion. The microwave absorption properties of M type hexagonal ferrite (La0.5K0.5)xBa1-xFe12O19 were investigated. The crystal lattice of the ferrite was confirmed by X-ray diffraction. The influence of the content of lanthanum on the dielectric constant and permeability of the ferrite was investigated. The results of the experiments indicate that microwave absorption properties of the ferrite could be dramatically improved with optimizing lanthanum doping (x=0.3).

关键词： sol-gel auto-combustion rare earth dopant (La0.5K0.5)xBa1-xFe12O19 ferrite microwave absorption properties rare earths

Energy-efficient Virtual Machine Allocation Technique Using Flower Pollination Algorithm in Cloud Datacenter:A Panacea to Green Computing

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Journal of Bionic Engineering 2019年第2期16卷 354-366页

作者： Mohammed Joda Usman Abdul Samad Ismail Hassan Chizari Gaddafi Abdul-Salaam Ali Muhammad Usman Abdulsalam Yau Gital Omprakash Kaiwartya Ahmed Aliyu department of maths Bauchi State University GadauBauchi 81007Nigeria department of Computer Science Universiti Teknology MalaysiaSkudai Johor 81310Malaysia School of Computing and Technology Park CampusUniversity of Gloucestershire Cheltenham GL50 4SHUK department of Computer Science Kwame Nkrumah University of Science and TechnologyKumasi 00233Ghana department of maths and Computer Federal College of Education Technical GombeGombe 072158Nigeria department of maths Abubakar Tafawa Balewa University BauchiBauchi 81027Nigeria department of Computer and Information Technology Northumbria UniversityNewcastle NE1SSTUK

Cloud computing has attracted significant interest due to the increasing service demands from organizations offloading computationally intensive tasks to ***,datacenter infrastructure comprises hardware resources that consume high amount of energy and give out carbon emissions at hazardous *** cloud datacenter,Virtual Machines(VMs)need to be allocated on various Physical Machines(PMs)in order to minimize resource wastage and increase energy *** allocation problem is *** finding an exact solution is complicated especially for large-scale *** this con text,this paper proposes an Energy-oriented Flower Pollination Algorithm(E-FPA)for VM allocation in cloud datacenter environments.A system framework for the scheme was developed to enable energy-oriented allocation of various VMs on a *** allocation uses a strategy called Dynamic Switching Probability(DSP).The framework finds a near optimal solution quickly and balances the exploration of the global search and exploitation of the local *** considers a processor,storage,and memory constraints of a PM while prioritizing energy-oriented allocation for a set of *** performed on MultiRecCloudSim utilizing planet workload show that the E-FPA outperforms the Genetic Algorithm for Power-Aware(GAPA)by 21.8%,Order of Exchange Migration(OEM)ant colony system by 21.5%,and First Fit Decreasing(FFD)by 24.9%.Therefore,E-FPA significantly improves datacenter performance and thus,enhances environmental sustainability.

关键词： virtualization green computing cloud datacenter energy optimization