摘要：
An unconditionally stable finite-difference time-domain (US-FDTD) method based on wave equation is introduced by making use of Laguerre polynomials as basis functions for expanding field components in time. This new wave-equation-based FDTD scheme is not only unconditionally stable but also requires less memory usage. Comparisons among the traditional FDTD, the conventional Laguerre-polynomial US-FDTD, and this proposed scheme are presented in the numerical examples in terms of the memory usage and computational time. (C) 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51:529-532, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24101
期刊：
FCST 2009: PROCEEDINGS OF THE 4TH INTERNATIONAL CONFERENCE ON FRONTIER OF COMPUTER SCIENCE AND TECHNOLOGY,2009年:473-477
通讯作者：
Xu, Kaihua
作者机构：
[Zhou, Jun; Dong, Shuyun; Xu, Kaihua] Huazhong Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.;[Liu, Yuhua] Huazhong Normal Univ, Dept Comp Sci, Wuhan 430079, Peoples R China.
通讯机构：
[Xu, Kaihua] H;Huazhong Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.
会议名称：
Frontier of Computer Science and Technology, 2009. FCST '09. Fourth International Conference on
摘要：
As clock frequencies increase, signal integrity problems becomes critical in electronic products design. It introduced signal integrity issues in brief and discussed an internal mechanism of crosstalk and reflection in details, using the EDA software Hyperlynx to analyze the signal integrity of High speed circuit system based on ARM9 processor. At last, it solved potential signal integrity problems by ways of termination technique.
作者机构：
[Wu, Shuang-Qing] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Wu, Shuang-Qing] C;Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.
摘要：
The aim of this paper is to investigate the separability of a spin- 1/2 spinor field in a five-dimensional rotating, charged black hole constructed by Cvetič and Youm in string theory, in the case when three U(1) charges are set equal. This black hole solution represents a natural generalization of the famous four-dimensional Kerr-Newman solution to five dimensions with the inclusion of a Chern-Simons term to the Maxwell equation. It is shown that the usual Dirac equation cannot be separated by variables in this general spacetime with two independent angular momenta. However if one supplements an additional counterterm into the usual Dirac operator, then the modified Dirac equation for the spin- 1/2 spinor particles is separable in this rotating, charged Einstein-Maxwell-Chern-Simons black hole background geometry. A first-order symmetry operator that commutes with the modified Dirac operator has exactly the same form as that previously found in the uncharged Myers-Perry black hole case. It is expressed in terms of a rank-three totally antisymmetric tensor and its covariant derivative. This tensor obeys a generalized Killing-Yano equation and its square is a second-order symmetric Stäckel-Killing tensor admitted by the five-dimensional rotating, charged black hole spacetime.
作者：
Chen, Lie-Wen;Ko, Che Ming;Liu, Wei;Zhang, Ben-Wei（张本威）
期刊：
Proceedings of Science,2009年 ISSN：1824-8039
作者机构：
[Chen, Lie-Wen] Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China;[Liu, Wei] Department of Finance, Texas A and M University, College Station, TX 77843-4218, United States;[Zhang, Ben-Wei] Institute of Particle Physics, Huazhong Normal University, Wuhan 430079, China;[Liu, Wei] Cyclotron Institute, Texas A and M University, College Station, TX 77843-3366, United States;[Ko, Che Ming] Cyclotron Institute, Department of Physics and Astronomy, Texas A and M University, College Station, TX 77843-3366, United States
摘要：
Heavy ion collisions in low energy runs at Relativistic Heavy Ion Collider (RHIC) and at future Facility for Antiproton and Ion Research (FAIR) in Germany are expected to produce a quark-gluon plasma that has a finite baryon chemical potential, allowing thus the possibility to study the location of the critical endpoint in the QCD phase diagram. In this talk, using a multiphase transport model, that includes interactions in both initial partonic and final hadronic matters and the transition between these two phases of matter, we discuss the effects of partonic interactions on observables such as the elliptic flow that have played essential roles in studying the properties of the net baryon free quark-gluon plasma produced in heavy ion collisions at higher energies at RHIC. Also, we study the effect of density fluctuations due to a first-order transition between the quark-gluon plasma and hadronic matter on fluctuations of hadron mean transverse momentum and produced deuteron number as well as on two-pion correlations. We further discuss the possibility of studying the mechanism of charm energy loss in the baryon-rich quark-gluon plasma and the properties of phi mesons in hot-dense matter produced in these collisions.
作者机构：
[Qin, Fang] Cent China Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.;Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Qin, Fang] C;Cent China Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
关键词：
chemical potential;entropy;fermion systems
摘要：
The finite-temperature thermodynamics of a unitary Fermi gas is studied in detail. The chemical potential, energy density, and entropy are given analytically with the quasilinear approximation. The ground-state energy agrees with previous theoretical and experimental results. Recently, the generalized exclusion statistics is applied to the discussion of the finite-temperature unitary Fermi-gas thermodynamics. A concrete comparison between the two different approaches is performed. Emphasis is made on the behavior of the entropy per particle. In physics, the slope of entropy gives the information on the effective fermion mass m∗/m in the low-temperature strongly degenerate region. Compared with m∗/m≈0.70<1 given in terms of the generalized exclusion statistics, our quasilinear approximation determines that m∗/m≈1.11>1.
期刊：
Journal of Physics B: Atomic, Molecular and Optical Physics,2009年42(12):125502- ISSN：0953-4075
通讯作者：
Li, Gao-xiang
作者机构：
[Tan, Hua-tang; Li, Gao-xiang] Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.;[Xia, Hong-xing] Xiaogan Univ, Dept Comp Sci, Xiaogan 432000, Peoples R China.
通讯机构：
[Li, Gao-xiang] H;Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
摘要：
We investigate the effects of spontaneously generated interference on the spectrum of quantum fluctuations in phase quadratures of resonant fluorescence emitted from the transition of j = 1/2 to j = 1/2 of a monochromatically driven four-level atom with antiparallel dipole moments. It is found that the spectrum exhibits obvious characteristics of quantum interference in both cases of weak and strong laser fields. For the Zeeman-degenerate system, strong radiation squeezing in weak atomic excitation can occur at the central frequency of the spectrum, which is quite different from the case without consideration of the interference. Moreover, when we apply an external magnetic field to the atom, we find that the quantum interference can lead to a narrowing spectrum with much stronger squeezing by adjusting the magnetic field strength. These results suggest that the phase-dependent fluorescence spectrum can serve as a probe of the quantum interference effects in a realistic system such as a trapped 198Hg+ ion or charged quantum dots.
作者机构：
College of Physical Science and Technology, HuaZhong Normal University, Wuhan 430079, China;Department of Computer Science, HuaZhong Normal University, Wuhan 430079, China
会议名称：
2009 2nd IEEE International Conference on Computer Science and Information Technology(第二届计算机科学与信息技术国际会议 ICCSIT2009)
会议时间：
2009-08-08
会议地点：
北京
会议论文集名称：
2009 2nd IEEE International Conference on Computer Science and Information Technology(第二届计算机科学与信息技术国际会议 ICCSIT2009)论文集
摘要：
This article introduced the design and implementation of real-time correcting remote sensing data based on the handset witch integrated 4S functions. Introduced the function and status quo of the 4S integrated system, given the development environment and related technologies of the 4S integrated handset correcting remote sensing data, explored the design method of the system's hardware and software. Using appropriate optimization algorithm to load remote sensing data fast, using GIS map overlay to collect real-time high-precision GPS geo-data, it can collect real-time, accurate mass of GPS information, achieve the accurate corrective of the remote sensing map,then send the corrected real-time data to the center through GPRS module witch embedded TCP/IP protocol. Combined with the advance of the WINCE system and the integrated development environment EVC perfect supports for the GDI interface,it can facilitate the design of correcting system, easy operation for user, become an extremely important field of the handheld device in field prospect. Keywords: 4S integration, Real-time rectification, handset, remote sensing data
作者机构：
[Huang Yan-Ping] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.;[Wu Yuan-Fang] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Huang Yan-Ping] C;Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
摘要：
The centrality, azimuthal and rapidity dependence of two-particle transverse-momentum correlations are studied for Au-Au collision at 200 GeV using RQMD (relativistic quantum molecular dynamics) with and without final hadron re-scattering models. The influences of the re-scattering effects on the measured correlations are discussed. The results are compared with those from current heavy ion experiments.
作者机构：
[Jiang, Qing-Quan; Cai, Xu] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Hebei, Peoples R China.;[Jiang, Qing-Quan] China W Normal Univ, Coll Phys & Elect Informat, Nanchong 637002, Sichuan, Peoples R China.
通讯机构：
[Jiang, Qing-Quan] C;Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Hebei, Peoples R China.
关键词：
Kerr-Godel black hole;Covariant anomaly;Effective action
摘要：
The existence of the Godel rotation parameter in Godel universe creates many interesting special features for Godel-type black holes. In this Letter, motivated by the fact that these new features provide additional tests as to the robustness of the covariant anomaly cancellation method and the effective action technique, we attempt to adopt the analyses to study Hawking radiation from Kerr-Godel black hole. The result is interesting and showing that the covariant anomaly cancellation method and the effective action technique applied to Kerr-Godel black hole yield Hawking temperatures consistent with the previous results made via other methods. (C) 2009 Elsevier B.V. All rights reserved.
作者：
Abelev, B. I.*;Aggarwal, M. M.;Ahammed, Z.;Alakhverdyants, A. V.;Anderson, B. D.;...
期刊：
PHYSICAL REVIEW C,2009年80(4):- ISSN：2469-9985
通讯作者：
Abelev, B. I.
作者机构：
[Iordanova, A.; Abelev, B. I.; Barannikova, O.; Hollis, R. S.; Kauder, K.; Garcia-Solis, E. J.; Hofman, D. J.; Betts, R. R.; Suarez, M. C.] Univ Illinois, Chicago, IL 60607 USA.;[Underwood, D. G.; Krueger, K.; Spinka, H. M.] Argonne Natl Lab, Argonne, IL 60439 USA.;[Bombara, M.; Jones, P. G.; Elhalhuli, E.; Gaillard, L.; Burton, T. P.; Nelson, J. M.; Barnby, L. S.] Univ Birmingham, Birmingham, W Midlands, England.;[Ullrich, T.; Pile, P.; Lamont, M. A. C.; LeVine, M. J.; Ljubicic, T.; Hallman, T. J.; Xu, Z.; Ogawa, A.; Ruan, L.; Tang, A. H.; Videbaek, F.; Fine, V.; Fisyak, Y.; Beavis, D. R.; Lauret, J.; Bland, L. C.; Okada, H.; Longacre, R. S.; Sorensen, P.; Christie, W.; Arkhipkin, D.; Lebedev, A.; Dunlop, J. C.; Perevoztchikov, V.; Gordon, A.; Landgraf, J. M.; DePhillips, M.; Love, W. A.; Yip, K.; Didenko, L.; Guryn, W.; Ludlam, T.; Van Buren, G.; Fachini, P.; Lee, J. H.] Brookhaven Natl Lab, Upton, NY 11973 USA.;[Perkins, C.; Crawford, H. J.; Engelage, J.; Judd, E. G.; Ng, M. J.] Univ Calif Berkeley, Berkeley, CA 94720 USA.
通讯机构：
[Abelev, B. I.] A;Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
摘要：
The results of midrapidity (0 < y < 0.8) neutral pion spectra over an extended transverse momentum range (1 < p(T) < 12 GeV/c) in root s(NN) = 200 GeV Au + Au collisions, measured by the STAR experiment, are presented. The neutral pions are reconstructed from photons measured either by the STAR Barrel Electro-Magnetic Calorimeter or by the Time Projection Chamber via tracking of conversion electron-positron pairs. Our measurements are compared to previously published pi(+/-) and pi(0) results. The nuclear modification factors R-CP and R-AA of pi(0) are also presented as a function of p(T). In the most central Au + Au collisions, the binary collision scaled pi(0) yield at high p(T) is suppressed by a factor of about 5 compared to the expectation from the yield of p + p collisions. Such a large suppression is in agreement with previous observations for light quark mesons and is consistent with the scenario that partons suffer considerable energy loss in the dense medium formed in central nucleus-nucleus collisions at the Relativistic Heavy Ion Collider.
