摘要：
The dynamical fluctuations in instanton induced events in e(+) p deep-inelastic scattering are studied using QCDINS 2.0 Monte Carlo generator. The hadron system produced from the fusion of quark gluon in the presence of instanton, referred to as instanton final state (IFS), is identified by a p(z)-sorting together with a theta(cut) method. The dynamical fluctuations inside the current jet and IFS are compared by means of the method of normalized factorial moments. The current jets are found to possess the typical characteristics of a "circular jet" with axial symmetry, while the dynamical fluctuations inside the IFS represent a three-dimensional isotropy.
作者机构：
[Abelev, B. I.] Univ Illinois, Chicago, IL 60607 USA.;Argonne Natl Lab, Argonne, IL 60439 USA.;Univ Birmingham, Birmingham, W Midlands, England.;Brookhaven Natl Lab, Upton, NY 11973 USA.;CALTECH, Pasadena, CA 91125 USA.
通讯机构：
[Abelev, B. I.] U;Univ Illinois, Chicago, IL 60607 USA.
作者：
Wang, W. L.*;Huang, F.;Zhang, Z. Y.;Yu, Y. W.（俞云伟）;Liu, F.
期刊：
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS,2007年34(7):1771-1782 ISSN：0954-3899
通讯作者：
Wang, W. L.
作者机构：
[Wang, W. L.] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430070, Peoples R China.;CCAST World Lab, Beijing 100080, Peoples R China.;Inst High Energy Phys, Beijing 100049, Peoples R China.
通讯机构：
[Wang, W. L.] H;Huazhong Normal Univ, Inst Particle Phys, Wuhan 430070, Peoples R China.
摘要：
The energies of the low- lying isoscalar and isovector udss configurations with spin-parity J(P) = 0(+), 1(+) and 2(+) are calculated in a non-relativistic constituent quark model by using the variational method. The contributions of various parts of the quark-quark interacting potentials including the s-channel interaction are investigated, and the effect of different forms of the confinement potential is examined. The model parameters are determined by the same method as in our previous work, and they still can satisfactorily describe the nucleon-nucleon scattering phase shifts and the hyperon-nucleon cross sections. The parameters of the s- channel interaction are fixed by the masses of K and K* mesons, for which the size parameter is taken to be two possible values. When it is chosen to be the same as baryons', the numerical results show that the masses of all the udss configurations are higher than the corresponding meson-meson thresholds. But when the size parameter for the K and K* mesons is adjusted to be smaller than that for the baryons, the udss configuration with I = 0 and J(P) = 1(+) is found to lie lower than the K* K* threshold, furthermore, this state has a very small KK* component and the interaction matrix elements between this state and KK* is comparatively small, thus its coupling to the KK* channel will consequently be weak and it might be regarded as a possible tetraquark candidate.
期刊：
International Journal of Modern Physics E,2007年16(07n08):2256-2262 ISSN：0218-3013
通讯作者：
Giannakis, Ioannis
作者机构：
[Giannakis, Ioannis; Ren, Hai-Cang] Rockefeller Univ, Dept Phys, New York, NY 10021 USA.;[Hou, Defu; Li, Jia-Rong; Ren, Hai-Cang] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;[Giannakis, Ioannis] Rockefeller Univ, Dept Phys, 1230 York Ave, New York, NY 10021 USA.
通讯机构：
[Giannakis, Ioannis] R;Rockefeller Univ, Dept Phys, 1230 York Ave, New York, NY 10021 USA.
会议名称：
19th International Conference on Ultra-Relativistic Necleus-Nucleus Collisions
会议时间：
NOV 14-20, 2006
会议地点：
Shanghai, PEOPLES R CHINA
会议主办单位：
[Giannakis, Ioannis;Ren, Hai-Cang] Rockefeller Univ, Dept Phys, New York, NY 10021 USA.^[Hou, Defu;Li, Jia-Rong;Ren, Hai-Cang] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
摘要：
We study the Anderson Localization effect on the shear viscosity in a system with random medium by Kubo formula. We show that this effect can reduce the shear viscosity nonperturbatively. Then we discuss its possible implementation in heavy-ion collisions, where the created heavy bound states or other collective modes may play the role of the random scatterer underlying Anderson Localization effect.
作者机构：
[C. B. Yang] Institute of Particle Physics, Hua-Zhong Normal University, Wuhan 430079, People's Republic of China;[C. B. Yang; Rudolph C. Hwa] Institute of Theoretical Science and Department of Physics, University of Oregon, Eugene, Oregon 97403-5203, USA
摘要：
The recombination model is applied to the production of K , ϕ , Λ , and Ω at all p T in central Au+Au collisions. The thermal-shower component of the recombination is found to be important for K and Λ, but only in a minor way for ϕ and Ω in the intermediate to high p T region. The normalization and inverse slope of the thermal partons in the strange sector are determined by fitting the low- p T data. At higher p T the data of K , Λ , ϕ , and Ω in the log scale are all well reproduced in our study that extends the thermal contribution and includes the shower contribution. The calculated result on the Λ / K ratio rises to a maximum of around 2 at p T ≈ 4 GeV/ c , arching over the data in linear scale. The production of ϕ and Ω are shown to arise mainly from the recombination of thermal partons, thus exhibiting exponential p T dependences in agreement with the data. Their ratio, R Ω / ϕ , rises linearly to p T ≈ 4 GeV/ c and develops a maximum at p T ≈ 5 . 5 GeV/ c . It is argued that the p T spectra of ϕ and Ω reveal directly the partonic nature of the thermal source that characterizes quark-gluon plasma. Comments are made on the Ω puzzle due to the simultaneous observation of both the exponential behavior of the Ω spectrum in p T and the existence of low- p T particles associated with Ω as trigger.
作者机构：
[Jia, Ya] Cent China Normal Univ, Sch Phys, Wuhan 430079, Peoples R China.;Cent China Normal Univ, Inst Biophys, Wuhan 430079, Peoples R China.;Jianghan Univ, Dept Phys, Wuhan 430056, Peoples R China.
通讯机构：
[Jia, Ya] C;Cent China Normal Univ, Sch Phys, Wuhan 430079, Peoples R China.
关键词：
Chemical Langevin equation;Finite molecule number;Intracellular calcium oscillations
期刊：
2007 INTERNATIONAL CONFERENCE ON WIRELESS COMMUNICATIONS, NETWORKING AND MOBILE COMPUTING, VOLS 1-15,2007年:37-40
通讯作者：
Zhan, Jinjing
作者机构：
[Liu, Shouyin; Zhan, Jinjing; Wang, Jun] Huazhong Normal Univ, Elect & Informat Engn Dept, Wuhan 430079, Peoples R China.;[Chong, Jong-Wha] Hanyang Univ, Coll Informat & Commun, Seoul 133791, South Korea.
通讯机构：
[Zhan, Jinjing] H;Huazhong Normal Univ, Elect & Informat Engn Dept, Wuhan 430079, Peoples R China.
会议名称：
第三届IEEE无线通讯、网络技术暨移动计算国际会议
会议时间：
2007-09-21
会议地点：
上海
会议论文集名称：
第三届IEEE无线通讯、网络技术暨移动计算国际会议论文集
关键词：
OFDM;superimposed training sequence;RLS;channel estimation
摘要：
The recursive least squares (RLS) algorithm and the superimposed training sequences are applied to the orthogonal frequency division multiplexing (OFDM) systems to estimate channel state information (CSI). In order to reduce the interference caused by the unknown information data that is added with the superimposed training sequences, we present the following method: first, the information data are detected using the CSI of the previous one block, and then subtracted them from the current received signals. Second, the remainder signals mainly including the training sequence are used to estimate CSI. For decreasing the computation complexity, we use the same training sequence in all OFDM blocks. The computation complexity and the mean square error (MSE) performance of our proposed RLS method are compared with the original RLS method.
摘要：
Light scattered by a regular structure of atoms can exhibit interference signatures, similar to the classical double-slit. These first-order interferences, however, vanish for strong light intensities, restricting potential applications. Here, we show how to overcome these limitations to quantum interference in strong fields. First, we recover the first-order interference in strong fields via a tailored electromagnetic bath with a suitable frequency dependence. At strong driving, the optical properties for different spectral bands are distinct, thus extending the set of observables. We further show that for a two-photon detector as, e.g., in lithography, increasing the field intensity leads to twice the spatial resolution of the second-order interference pattern compared to the weak-field case.
作者机构：
[Yang, C. B.; Yang, CB] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;[Yang, CB] Univ Oregon
通讯机构：
[Yang, C. B.] C;Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
会议名称：
19th International Conference on Ultra-Relativistic Necleus-Nucleus Collisions
会议时间：
NOV 14-20, 2006
会议地点：
Shanghai, PEOPLES R CHINA
会议主办单位：
Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.^Univ Oregon, Eugene, OR 97403 USA.
摘要：
The recombination model is applied to the production of K, Lambda, phi, and Omega at all p(T) in central Au+Au collisions. The thermal-shower component of the recombination is found to be important for K and Lambda in the intermediate p(T) region. For phi and Omega, the pure thermal recombination dominates up to 8 GeV/c. The contribution from shower strange quarks to multi-strange particle spectra can be seen from the Omega/Phi ratio.
摘要：
Solar cells based on dye-sensitized nanostructured metal oxides are promising for low-cost solar energy conversion and are intensively investigated nowadays. In this paper, the possibilities to use nanocrystalline ZnO electrodes in dye-sensitized solar cells are investigated. ZnO films have been grown on fluorine-doped SnO<inf>2</inf> coated glass by cathodic electrodeposition from a simple aqueous zinc nitrate solution containing organic additives. Under optimal deposition conditions, nanoporous ZnO films with grain sizes between 20 and 40 nm are obtained. X-ray diffraction and scanning electron microscope are used to characterize the films. Nanoporous ZnO electrodes, dye-sensitized with a ruthenium bipyridyl complex, are used as photoanodes in solar cells. The solar cell performance is studied and the cell exhibits a short circuit photocurrent, an open-circuit photovoltage and the photoelectron conversion efficiency of 1.379 mA/cm<sup>2</sup>, 0.612 V and 1.47%, respectively.
