作者机构：
[Luo, Xiaofeng] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;[Luo, Xiaofeng] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China.
通讯机构：
[Luo, Xiaofeng] C;Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
摘要：
I provide a unified description of efficiency correction and error estimation for moments of conserved quantities in heavy-ion collisions. Moments and cumulants are expressed in terms of the factorial moments, which can be easily corrected for the efficiency effect. By deriving the covariance between factorial moments, one can obtain the general error formula for the efficiency corrected moments based on the error propagation derived from the Delta theorem. The Skellam-distribution-based Monto Carlo simulation is used to test the Delta theorem and bootstrap error estimation methods. The statistical errors calculated from the two methods can well reflect the statistical fluctuations of the efficiency corrected moments.
期刊：
PROCEEDINGS OF ICCE'98, VOL 2 - GLOBAL EDUCATION ON THE NET,2015年:689-689
作者机构：
[Liu, SJ; Tang, HH] Cent China Normal Univ, Wuhan, Peoples R China.
会议名称：
Global Education on the Net vol.2
会议时间：
1998
会议地点：
Beijing,China
会议论文集名称：
Global Education on the Net vol.2
摘要：
CAI is showing a tendency to utilize the latest multimedia technique and network technique, and the trend is causing CAI to be much more complicated than before. Therefore, we has developed a web-based CAI authoring system ,which can help teachers to make full use of the resources of multimedia and its net work, to apply and exploit new CAI software.
作者机构：
[Dai, Wei] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China.;[Chen, Xiao-Fang] Jiangsu Normal Univ, Sch Phys & Elect Engn, Xuzhou 221116, Peoples R China.;[Wang, Enke; Zhang, Ben-Wei] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China.;[Wang, Enke; Zhang, Ben-Wei] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, Ben-Wei] C;Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China.
摘要：
The transverse momentum spectrum of eta meson in relativistic heavy-ion collisions is studied at the Next-to-Leading Order (NLO) within the perturbative QCD, where the jet quenching effect in the QGP is incorporated with the effectively medium-modified eta fragmentation functions using the higher-twist approach. We show that the theoretical simulations could give nice descriptions of PHENIX data on eta meson in both p + p and central Au + Au collisions at the RHIC, and also provide numerical predictions of eta spectra in central Pb + Pb collisions with root s(NN) = 2.76 TeV at the LHC. The ratios of eta/pi(0) in p + p and in central Au + Au collisions at 200 GeV are found to overlap in a wide p(T) region, which matches well the measured ratio eta/pi(0) by PHENIX We demonstrate that, at the asymptotic region when p(T) -> infinity the ratios of eta/pi(0) in both Au + Au and p + p are almost determined only by quark jets fragmentation and thus approach to the one in e(+)e(-) scattering; in addition, the almost identical gluon (quark) contribution fractions to eta and to pi result in a rather moderate variation of eta/pi(0) distribution at intermediate and high PT region in A + A relative to that in p + p; while a slightly higher eta/pi(0) at small PT in Au + Au can be observed due to larger suppression of gluon contribution fraction to pi(0) as compared to the one to eta. The theoretical prediction for eta/pi(0) at the LHC has also been presented. (C) 2015 The Authors. Published by Elsevier B.V.
期刊：
International Journal of Materials Research,2015年106(9):957-961 ISSN：1862-5282
通讯作者：
Tan, Ming
作者机构：
[Mukhtar, Aiman; Khan, Babar Shahzad; Tan, Ming; Mehmood, Tahir] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.;[Tan, Ming] Cent China Normal Univ, Coll Phys Sci & Technol, Luo Yu Lu 152, Wuhan 430079, Peoples R China.
通讯机构：
[Tan, Ming] C;Cent China Normal Univ, Coll Phys Sci & Technol, Luo Yu Lu 152, Wuhan 430079, Peoples R China.
摘要：
To fully understand the mechanism of forming fcc Co in electrodeposition, the effect of bath temperature and pH on the structure of electrodeposited Co nanowires is studied by means of X-ray diffraction and scanning electron microscopy. At -3.0 V and pH 2.5, the fraction of fcc Co decreases with increasing temperature, ranging from 1 (25 degrees C, pure fcc Co) to 0 (45 degrees C, pure hcp Co). The formation of hcp Co can be attributed to larger critical clusters formed at higher temperatures. The pH value has no appreciable effect on the formation of fcc Co nanowires. This is because the H adatoms produced at the cathodic surface can penetrate quickly through the thin Au film and desorb into air.
作者机构：
[Wu, An-Xin; Jia, Feng-Cheng; Zhou, Zhi-Wen; Xu, Cheng; Cai, Qun; Li, Deng-Kui] Cent China Normal Univ, Coll Chem, Key Lab Pesticide & Chem Biol, Minist Educ, Wuhan 430079, Hubei, Peoples R China.;[Wu, An-Xin] Lanzhou Univ, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China.
通讯机构：
[Wu, An-Xin] C;Cent China Normal Univ, Coll Chem, Key Lab Pesticide & Chem Biol, Minist Educ, Wuhan 430079, Hubei, Peoples R China.
摘要：
A highly efficient multicomponent domino protocol has been developed for the synthesis of 5-phenyl-[1,2,3]triazolo[1,5-c]quinazolines from simple and readily available (E)-1-bromo-2-(2-nitrovinyl)benzenes, aldehydes, and sodium azide. This elegant domino process involved consecutive [3 + 2] cycloaddition, copper-catalyzed SNAr, reduction, cyclization, and oxidation sequences. Notably, sodium azide acted as a dual nitrogen source in the construction of this novel fused N-heterocycle.
摘要：
A facile hydrothermal method was employed to synthesize porous alpha-Fe2O3@SnO2 heterostructure nanotubes. The morphologies and structures of the as-prepared samples were characterized by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray powder diffraction (XRD), and N-2 adsorption-desorption techniques. The hollow alpha-Fe2O3 nanotubes with outer diameters of about 90 nm were uniformly coated by a 10 nm thick layer of SnO2 nanoparticles, demonstrating apparent heterostructures. The alpha-Fe2O3@SnO2 heterostructure nanotubes were applied to construct gas-sensor devices which exhibited high sensitivity, fast response-recovery, good selectivity and excellent repeatability to acetone. Because of the porous structure and large specific surface area, the heterogeneous core-shell nanocomposites show a markedly enhanced gas sensing performance in comparison with the initial alpha-Fe2O3 nanotubes and the pure SnO2 nanoparticles. For example, the sensitivity of the alpha-Fe2O3@SnO2 composites to 100 ppm acetone can reach as high as 33.4 at the optimum operating temperature of 300 degrees C, which was about twice of the value for pure alpha-Fe2O3 nanotubes and even up to 5-fold higher than that of pure SnO2 nanoparticles. (C) 2015 Elsevier B.V. All rights reserved.
摘要：
The evaluation of node importance has great significance to complex network, so it is important to seek and protect important nodes to ensure the security and stability of the entire network. At present, most evaluation algorithms of node importance adopt the single-index methods, which are incomplete and limited, and cannot fully reflect the complex situation of network. In this paper, after synthesizing multi-index factors of node importance, including eigenvector centrality, betweenness centrality, closeness centrality, degree centrality, mutual-information, etc., the authors are proposing a new multi-index evaluation algorithm of identifying important nodes in complex networks based on linear discriminant analysis (LDA). In order to verify the validity of this algorithm, a series of simulation experiments have been done. Through comprehensive analysis, the simulation results show that the new algorithm is more rational, effective, integral and accurate.
摘要：
We investigate the Gubser solution of viscous hydrodynamics at finite density and analytically compute the flow harmonics vn. We explicitly show how vn and their viscous corrections depend on the chemical potential. The difference in vn between particles and antiparticles is also analytically computed and shown to be proportional to various chemical potentials and the viscosity. Excellent agreement is obtained between the results and the available experimental data from the SPS, RHIC and the LHC.
作者机构：
[Xiao, Bo-Wen; Wang, Xin-Nian; Pang, Long-Gang] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China.;[Xiao, Bo-Wen; Wang, Xin-Nian; Pang, Long-Gang] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;[Hatta, Yoshitaka] Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan.;[Wang, Xin-Nian] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
通讯机构：
[Pang, Long-Gang] C;Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China.
摘要：
Evolution of quark-gluon plasma near equilibrium can be described by the second-order relativistic viscous hydrodynamic equations. Consistent and analytically verifiable numerical solutions are critical for phenomenological studies of the collective behavior of quark-gluon plasma in high-energy heavy-ion collisions. A novel analytical solution based on the conformal Gubser flow that is a boost-invariant solution with transverse fluid velocity is presented. Because of the nonlinear nature of the equation, the analytical solution is nonperturbative and exhibits features that are rather distinct from solutions to usual linear hydrodynamic equations. It is used to verify with high precision the numerical solution with a newly developed state-of-the-art (3+1)-dimensional second-order viscous hydro code (CLVisc). The perfect agreement between the analytical and numerical solutions demonstrates the reliability of the numerical simulations with the second-order viscous corrections. This lays the foundation for future phenomenological studies that allow one to gain access to the second-order transport coefficients.
摘要：
Jet quenching in high-energy heavy-ion collisions can be used to probe properties of hot and dense quark–gluon plasma. We provide a brief introduction to the concept and framework for the study of jet quenching. Different approaches and implementation of multiple scattering and parton energy loss are discussed. Recent progresses in the theoretical and phenomenological studies of jet quenching in heavy-ion collisions at RHIC and LHC are reviewed.
摘要：
The exploration of the strong-interaction matter under extreme conditions is one of the main goals of relativistic heavy-ion collisions. We provide some of the main results on the novel properties of quark-gluon plasma, with particular focus given to the strong collectivity and the color opaqueness exhibited by such hot and dense matter produced in high-energy nuclear collisions at RHIC and the LHC.
作者机构：
[Cao, Shanshan] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA.;[Bass, Steffen A.; Cao, Shanshan] Duke Univ, Dept Phys, Durham, NC 27708 USA.;[Qin, Guang-You] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;[Qin, Guang-You] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China.;[Cao, Shanshan] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Nucl Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
通讯机构：
[Cao, Shanshan] U;Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Nucl Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
摘要：
We construct a theoretical framework to describe the evolution of heavy flavors produced in relativistic heavy-ion collisions. The in-medium energy loss of heavy quarks is described using our modified Langevin equation that incorporates both quasielastic scatterings and the medium-induced gluon radiation. The space-time profiles of the fireball are described by a (2+1)-dimensional hydrodynamics simulation. A hybrid model of fragmentation and coalescence is utilized for heavy quark hadronization, after which the produced heavy mesons together with the soft hadrons produced from the bulk quark-gluon plasma (QGP) are fed into the hadron cascade ultrarelativistic quantum molecular dynamics (UrQMD) model to simulate the subsequent hadronic interactions. We find that the medium-induced gluon radiation contributes significantly to heavy quark energy loss at high pT; heavy-light quark coalescence enhances heavy meson production at intermediate pT; and scatterings inside the hadron gas further suppress the D meson RAA at large pT and enhance its v2. Our calculations provide good descriptions of heavy meson suppression and elliptic flow observed at both the Large Hadron Collider and the Relativistic Heavy-Ion Collider.
作者机构：
[Roy, Victor; Qin, Guang-You; Wang, Xin-Nian; Pang, Long-Gang] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;[Roy, Victor; Qin, Guang-You; Wang, Xin-Nian; Pang, Long-Gang] Cent China Normal Univ, Key Lab Quarks & Lepton Phys MOE, Wuhan 430079, Peoples R China.;[Roy, Victor] Goethe Univ Frankfurt, Inst Theoret Phys, D-60438 Frankfurt, Germany.;[Wang, Xin-Nian] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA.;[Ma, Guo-Liang] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China.
通讯机构：
[Pang, Long-Gang] C;Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
摘要：
Fluctuations in the initial transverse energy-density distribution lead to anisotropic flows as observed in central high-energy heavy-ion collisions. Studies of longitudinal fluctuations of the anisotropic flows can shed further light on the initial conditions and dynamical evolution of the hot quark-gluon matter in these collisions. Correlations between anisotropic flows with varying pseudorapidity gaps in Pb+Pb collisions at the CERN Large Hadron Collider are investigated using both an event-by-event (3+1)-dimensional ideal hydrodynamical model with fluctuating initial conditions and a multiphase transport (AMPT) Monte Carlo model for high-energy heavy-ion collisions. Anisotropic flows at different pseudorapidities are found to become significantly decorrelated with increasing pseudorapidity gaps due to longitudinal fluctuations in the initial states of heavy-ion collisions. The longitudinal correlation of the elliptic flow shows a strong centrality dependence while the correlation of the triangular flow is independent of the centrality. Longitudinal fluctuations as a source of the decorrelation are further shown to consist of a twist or gradual rotation in flow angles between the forward and backward direction and additional fluctuations on top of the twist. Within the AMPT model, longitudinal correlations of anisotropic flows are also found to depend on the value of partonic cross sections. The implications of constraining the initial conditions and shear viscosity to entropy density ratio of the partonic matter in high-energy heavy-ion collisions are also discussed.
摘要：
The ATPsyn-b encoding for subunit b of ATP synthase in Drosophila melanogaster is proposed to act in ATP synthesis and phagocytosis, and has been identified as one of the sperm proteins in both Drosophila and mammals. At present, its details of functions in animal growth and spermatogenesis have not been reported. In this study, we knocked down ATPsyn-b using Drosophila lines expressing inducible hairpin RNAi constructs and Gal4 drivers. Ubiquitous knockdown of ATPsyn-b resulted in growth defects in larval stage as the larvae did not grow bigger than the size of normal second-instar larvae. Knockdown in testes did not interrupt the developmental excursion to viable adult flies, however, these male adults were sterile. Analyses of testes revealed disrupted nuclear bundles during spermatogenesis and abnormal shaping in spermatid elongation. There were no mature sperm in the seminal vesicle of ATPsyn-b knockdown male testes. These findings suggest us that ATPsyn-b acts in growth and male fertility of Drosophila.
摘要：
QseB/QseC is one of the five predicted two-component systems (TCSs) in Actinobacillus pleuropneumoniae. To understand the roles of this TCS in A. pleuropneumoniae, a markerless gene-deletion mutant Delta qseBC was constructed. Differentially expressed (DE) genes in Delta qseBC were filtered by microarray analysis. A total of 44 DE genes were found to be regulated by QseB/QseC system. The transcriptional profile of A. pleuropneumoniae Delta qseBC was compared with that of Delta luxS and catecholamine (CA) stimulations, 13 genes regulated by QseB/QseC were found also regulated by LuxS, and 3 Qse-regulons were co-regulated by CA stimulations, respectively. Binding of QseB to the promoters of three regulons (pilM, glpK and hugZ), which were co-regulated by QseB/QseC and LuxS, was evaluated by electrophoretic mobility-shift assay. Results indicated that pilM was directly regulated by phosphorylated-QseB. Then the pilM deletion mutant Delta pilM was constructed and characterized. Data presented here revealed that adherence ability of Delta pilM to St. Jude porcine lung cells was significantly decreased, and Delta pilM exhibited reduced virulence in pigs, suggesting PilM contributes to the process of A. pleuropneumoniae infection. (C) 2015 Elsevier B.V. All rights reserved.
