期刊：
Microwave and Optical Technology Letters,2009年51(8):1865-1868 ISSN：0895-2477
通讯作者：
Li, Minhua
作者机构：
[Yang, Helin; Li, Minhua] Huazhong Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.;[Wen, Ding-e] Natl Key Lab EMC, Wuhan 430079, Peoples R China.
通讯机构：
[Li, Minhua] H;Huazhong Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.
关键词：
metamaterials;left‐handed material;split ring resonator (SRR);plasma frequency;negative magnetic permeability
摘要：
Free-space microwave measurements are applied on composite metamaterials (CMMs) consisting of split ring resonators (SRRs) and wires, also known as left-handed material. Our experiments are based on a type of CMMs with unique configurations and the transmission and reflection measurements performed in free space exhibit a pass band at about 9 GHz. Simulation results are also given, which are in good agreements with experiments. The widely belief of the pass band is that the stop hands of the SRRs alone and the wires alone constitute a clear demonstration of left-handed (LH) behavior. The LH behavior only take place in the medium with simultaneously negative permittivity epsilon, and permeability mu, also called double negative materials. (C) 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1865-1868. 2009; Published online in Wiley InterScience (www.interscience.wiley.com) DOI 10.1002/mop.24465
摘要：
Novel sheetlike Cu2O two-dimensional (2D) nanoarchitectures were successfully synthesized via a copper nanoparticle-mediated process for the first time. Uniform and nearly monodisperse Cu nanocolloids were firstly synthesized by disproportionating reaction of Cu+ at the surfactant-free ambient conditions, and Cu2O nanosheets were subsequently synthesized by choosing ethanol solvent agent to limit the oxidized processes Of Cu nanocolloids. The synthesized products were systematically studied by X-ray powder diffraction, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and UV-vis absorption spectra. It was demonstrated that the solvent agent of ethanol played key roles in the formation of the as-synthesized nanosheets. By choosing the different solvent agents to limit the oxidized processes, Cu2O nanospheres and nanocubes can be selectively synthesized accordingly. (C) 2008 Elsevier Inc. All rights reserved.
作者机构：
[Dumitru, Adrian] CUNY, Baruch Coll, Dept Nat Sci, New York, NY 10010 USA.;[Dumitru, Adrian] Brookhaven Natl Lab, RIKEN, BNL, Res Ctr, Upton, NY 11973 USA.;[Dumitru, Adrian] CUNY, Grad Sch, New York, NY 10036 USA.;[Guo, Yun] Goethe Univ Frankfurt, Helmholtz Res Sch, D-60438 Frankfurt, Germany.;[Guo, Yun] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Dumitru, Adrian] C;CUNY, Baruch Coll, Dept Nat Sci, 17 Lexington Ave, New York, NY 10010 USA.
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.
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
通讯机构：
[Duan, Chuanxi] H;Huazhong Normal Univ, Coll Phys Sci & Technol, 152 Luoyu Rd, Wuhan 430079, Peoples R China.
关键词：
Rovibrational spectrum;He-N2O;van der Waals complex;POTENTIAL-ENERGY SURFACE;QUADRUPOLE HYPERFINE-STRUCTURE;ROTATIONAL SPECTRUM;ROVIBRATIONAL SPECTRA;AR-N2O;NE-N2O;DIMER
摘要：
The rovibrational spectrum of the He-N2O van der Waals complex has been recorded in the N2O-monomer nu(1) region (similar to 1285 cm(-1)) using an infrared tunable diode laser spectrometer in conjunction with a free supersonic jet expansion and an astigmatic multi-pass absorption cell. Twenty-two lines are assigned to the nu(2)-band of He-N2O. Rotational constants for the nu(2)-excited state are derived. The band-origin of the spectrum is determined to be nu(0) = 1285.0666(7) cm(-1) and shows a blue-shift of 0.1633(8) cm(-1) compared with the N2O nu(1)-band origin. (C) 2008 Elsevier Inc. All rights reserved.
作者机构：
[Shaowei L.; 刘毅; 黄璐] College of Physical Science and Technology, Central China Normal University, Wuhan 430079, China;Digital Engineering Research and Simulation Center, Hua zhong University of Science and Technology, Wuhan 430074, China;[刘蓉] College of Physical Science and Technology, Central China Normal University, Wuhan 430079, China, Digital Engineering Research and Simulation Center, Hua zhong University of Science and Technology, Wuhan 430074, China
通讯机构：
[Liu, R.] C;College of Physical Science and Technology, Central China Normal University, China
作者机构：
Institute of Particle Physics,Huazhong Normal University(HZNU),Wuhan 430079,China;The Key Laboratory of Quark and Lepton Physics(HZNU),Ministry of Education,Wuhan 430079,China
会议名称：
The 5th International Conference on Quarks and Nuclear Physics(第五届夸克核物理国际会议 QNP09)
会议时间：
2009-09-21
会议地点：
北京
会议论文集名称：
The 5th International Conference on Quarks and Nuclear Physics(第五届夸克核物理国际会议 QNP09)论文集
关键词：
heavy ion collisions;elliptic flow;directed flow;anti-flow;ideal hydrodynamic
摘要：
STAR's measurement of directed flow for pions,kaons(K0S),protons and anti-protons,for Au+Au collisions at 200 GeV obtained in Run7 are presented,as well as elliptic flow for identified particles measured in Au+Au(Run7)and Cu+Cu(Run5)collisions.It is found that the slope of proton v1(y)at midrapidity is extremely small.Elliptic flow results are compared to Hydro calculation and the discrepancy is discussed.
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.
