摘要：
ATT7022B的校表过程十分繁琐,通过计算机软件实现自动校表可以大大提高校表效率和数据的准确度,同时降低校表的劳动强度.本文根据实际校表需要,设计了ATT7022B自动化校表系统,该设计包括串口应用层协议、上位机软件和下位机软件.文中详细介绍了自定义的校表协议,重点讨论了上位机软件设计,给出了上位机、下位机的通信软件流程图,利用Visual C++ 6.0实现了上位机与表模块的通信,完成了以ATT7022B为核心的表模块校验.
摘要：
A relativistic transport model (ART1.0) is applied to simulate the stopping effects in tip-tip and body-body U+U collisions, at a beam kinetic energy of 520 MeV/nucleon. Our simulation results have demonstrated that both central collisions of the two extreme orientations can achieve full stopping and also form a bulk of hot, dense nuclear matter with a sufficiently large volume and long duration, because of the largely deformed uranium nuclei. The nucleon sideward flow in the tip-tip collisions is nearly three times larger than that in body-body ones at the normalized impact parameter b/bmax<0.5, and that the body-body central collisions have a large negative nucleon elliptic flow v2=−12% in contrast to zero in tip-tip ones. Thus the extreme circumstance and the novel experimental observables in tip-tip and body-body collisions can provide a good condition and sensitive probe for studying the nuclear EoS, respectively. The cooling storage ring (CSR) external target facility (ETF) to be built at Lanzhou, China, delivering a uranium beam up to 520 MeV/nucleon is expected to make a significant contribution to exploring the nuclear equation of state (EoS).
期刊：
Journal of High Energy Physics,2007年2007(06):038-038 ISSN：1029-8479
通讯作者：
Chang, Qin
作者机构：
[Chang, Qin] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Hubei, Peoples R China.;Henan Normal Univ, Dept Phys, Xinxiang 453007, Henan, Peoples R China.;Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.;Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China.
通讯机构：
[Chang, Qin] H;Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Hubei, Peoples R China.
关键词：
sum rules;1/N expansion;chiral lagrangians
摘要：
We investigate whether the anomalous tensor operators with the Lorentz structure (sigma(mu nu)(1 + gamma(5)) circle times sigma(mu nu) (1 + gamma(5)), which could provide a simple resolution to the polarization anomaly observed in B -> phi K* decays, could also provide a coherent resolution to the large B(B -> eta K*) and survive bounds from B -> eta K decays. Parameter spaces satisfying all these experimental data are obtained, and found to be dominated by the color-octet tensor operator contribution. Constraints for the equivalent solution with (1 + gamma(5)) circle times (1 + gamma(5)) operators are also derived and found to be dominated by the color-singlet one. With the constrained parameter spaces, we finally give predictions for B-s ->phi phi decay, which could be tested at the Fermilab Tevatron and the LHC-b experiments.
作者机构：
[Luo, Yongsong] Cent China Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.;Xinyang Normal Univ, Dept Phys Elect Engn, Xinyang 464000, Peoples R China.
通讯机构：
[Luo, Yongsong] C;Cent China Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
摘要：
Novel flowerlike nanostructures consisting of Cu2O nanopetals were successfully synthesized by a facile wet chemical method for the first time. The synthesized products were systematically studied by X-ray powder diffraction, scanning electron microscopy, and transmission electron microscopy. The results showed that the nucleation and growth of the nanoflowers were governed by a nucleation−dissolution−recrystallization growth mechanism. It is noteworthy that the initially formed Cu2O nanoparticles without addition of NaOH were crucial to the growth of the final nanoarchitectures. A UV−vis spectrum was used to estimate the band gap energies of the nanoflowers. Further control experiments were also carried out to investigate the factors that impact the morphology and size of the products. It was demonstrated that the concentrations of NaOH and cetyltrimethylammonium bromide (CTAB) play key roles in the formation of the as-synthesized nanoflowers. By adjusting the concentration of NaOH and CTAB, temperature, and the quantity of water, Cu2O micrograss, nanorods, and pricky microrods can be synthesized accordingly. Our stepwise synthetic method may shed some light on the design of other well-defined complex nanostructures.
关键词：
Capacity advantage;Spherical morphology;Structural symmetry;Structural symmetry difference;Carbon nanotubes;Copper oxides;Electron energy loss spectroscopy;High resolution transmission electron microscopy;Morphology;X ray photoelectron spectroscopy;X ray powder diffraction;Nanocrystals;copper derivative;copper oxide;digitoxin;nanocrystal;unclassified drug;analytic method;article;dispersion;nanoanalysis;priority journal;transmission electron microscopy;X ray diffraction;X ray photoelectron spectroscopy
摘要：
Copper oxide nanocrystals decorated on multi-wall carbon nanotubes have been prepared. Comprehensive morphological, structural and spectroscopical studies have been carried out on the nanometre/atomic scale by the combination of high-resolution transmission electron microscopy and electron energy-loss near-edge structure in electron energy-loss spectroscopy, which has a high spatially resolved capacity advantage over the normally used analytical techniques such as x-ray powder diffraction (XRD) and x-ray photoelectron spectroscopy (XPS). The result reveals that highly crystalline cubic Cu2O nanocrystals with highly uniform dispersion, homogeneous size of about 5.3 nm and nearly spherical morphology are synthesized as the predominant phase, while rare individual monoclinic CuO nanocrystals with irregular shape are still present as the minor phase. The analysis based on the survey result and the structural symmetry difference between Cu2O and CuO demonstrates that XRD underestimates the presence of the CuO phase with much lower structural symmetry while XPS overestimates the proportion of CuO phase.
期刊：
International Journal of Modern Physics E,2007年16(10):3185-3192 ISSN：0218-3013
通讯作者：
Zhang, Hanzhong
作者机构：
[Wang, Enke; Zhang, Hanzhong] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, Hanzhong] H;Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
摘要：
The azimuthal anisotropy of high pT hadron in high energy A + A collisions is studied within the next-to-leading order (NLO) perturbative QCD parton model. The effect of jet quenching is incorporated via a model for modified jet fragmentation functions due to radiative parton energy loss in dense medium. Because NLO contributions behave with stronger quenching effect than LO contributions, the NLO elliptic flow parameter is found to be larger than the LO in the medium pT region.
期刊：
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS,2007年34(8):S1113-S1117 ISSN：0954-3899
通讯作者：
Wu, Yuanfang
作者机构：
[Huang, Yanping; Wu, Yuanfang] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Wu, Yuanfang] H;Huazhong 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：
Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
摘要：
Two-charge-particle azimuthal correlations (TCPAC) and the azimuthal charge balance function (ACBF) are compared with anisotropic flow by using transport models, RQMD and AMPT. In these two models, TCPAC has the same centrality dependence as anisotropic flow. The momentum conservation contributes only back-to-back correlations in TCPAC, which are well separated from small angle correlations caused by anisotropic transverse momentum distribution, while the centrality dependence of ACBF is different from those of anisotropic flow and TCPAC. This indicates that ACBF cannot be used as another presentation of anisotropic flow, as expected from thermal models.
摘要：
<jats:p> Size and position of rapidity window dependence of charge fluctuations and correlations are studied by PYTHIA and RQMD models for hadron–hadron and nucleus–nucleus collisions respectively. The results show that all the measures for charge fluctuations and correlations depend on the size of central rapidity windows and most of them depend on the position of the rapidity windows, which is not expected. Only charge balance function in hadron–hadron collisions is independent of the position of rapidity window, i.e. boost-invariant, in consistent with corresponding experimental data, while charge fluctuations measured by D(Q) is not boost-invariant in contrast to the experimental data. The measures for three kind of charge correlations (R<jats:sub>++</jats:sub>, R<jats:sub>--</jats:sub>, R<jats:sub>+-</jats:sub>) show a good account for the behavior of charge correlations and global charge conservation in longitudinal phase space in both PYTHIA and RQMD. </jats:p>
期刊：
Modern Physics Letters B,2007年21(12):745-750 ISSN：0217-9849
通讯作者：
Hou, X.-W.
作者机构：
[Hou, Xi-Wen] Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.;[Chen, Jing-Hua] Huazhong Normal Univ, Dept Informat Management, Wuhan 430079, Peoples R China.;[Wan, Ming-Fang] Wuhan Univ Technol, Sch Nat Sci, Wuhan 430079, Peoples R China.;[Ma, Zhong-Qi] Inst High Energy Phys, Beijing 100049, Peoples R China.
通讯机构：
Department of Physics, Huazhong Normal University, China
关键词：
Vibrational analysis;quantum entanglement
摘要：
<jats:p> Quantum entanglement of anharmonic stretches in molecules H <jats:sub>2</jats:sub> O and SO <jats:sub>2</jats:sub> is studied in terms of the reduced-density linear entropy with initial squeezed vacuum states and thermal states. It is shown that the entropy of both kinds of initial states with a small amplitude [Formula: see text] is quasi-periodic with the period of thermal states being larger than that of squeezed vacuum states for each molecule. The entropy evolution of both kinds of initial states with a larger amplitude [Formula: see text] is irregular. For each kind of initial state, the frequency of oscillation of the entropy for SO <jats:sub>2</jats:sub> is larger than that for H <jats:sub>2</jats:sub> O . That can be useful in quantum computing based on vibrational states in H <jats:sub>2</jats:sub> O and SO <jats:sub>2</jats:sub>. </jats:p>
作者机构：
[Hu, Xiang-ming; Wang, Fei] Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Hu, Xiang-ming] H;Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
摘要：
We show that strongly correlated and anticorrelated photons can be produced from two fluorescent fields emitted by a driven cascade atom with split metastable states. Depending on the choice of parameters, we have strong correlations for both fluorescent fields, anticorrelations for both, and strong correlation for one and anticorrelation for the other. In the presence of level splitting, we have two interfering cascade-dressed transitions from the top state to the antisymmetric superposition of the metastable states. The interference between the two cascade-dressed transitions is responsible for the strong correlations and anticorrelations.
作者机构：
[Zhang, Jiepeng] Florida Int Univ, Dept Phys, Miami, FL 33199 USA.;Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, Jiepeng] F;Florida Int Univ, Dept Phys, Miami, FL 33199 USA.
摘要：
We report an experimental study of atomic coherence and interference in a three-level Λ system of cold Rb atoms driven by multicolor coupling and probe fields. The multicolor coupling and probe fields open multiple channels for a two-photon Raman process. Interference between the open channels leads to rich spectral features in the Λ system and can be controlled by the phase of the probe field. The constructive-interference-induced transparency or the destructive-interference-induced absorption with a subnatural linewidth can be selectively created near the atomic resonance.
作者机构：
Rockefeller Univ, Dept Phys, New York, NY 10021 USA.;Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, 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.
摘要：
The fluctuations of the Higgs and pseudo Nambu-Goldstone fields in the 2-flavor color superconductivity (2SC) phase with mismatched pairing are described in the nonlinear realization framework of the gauged Nambu-Jona-Lasinio model. In the gapless 2SC phase, not only Nambu-Goldstone currents can be spontaneously generated, but also the Higgs field exhibits instablity. The Nambu-Goldstone currents generation indicates the formation of the single plane wave Larkin-Ovchinnikov-Fulde-Ferrel state and breaks rotation symmetry, while the Higgs instability favors spatial inhomogeneity and breaks translation invariance. In this paper, we focus on the Higgs instability which has not drawn much attention yet. The Higgs instability cannot be removed without a long range force, thus it persists in the gapless superfluidity and induces phase separation. In the case of gapless 2-flavor color superconductivity state, the Higgs instability can only be partially removed by the electric Coulomb energy. However, it is not excluded that the Higgs instability might be completely removed in the charge neutral gapless color-flavor locked phase by the color Coulomb energy.
期刊：
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS,2007年34(8):S873-S878 ISSN：0954-3899
通讯作者：
Li, Xiao-Mei
作者机构：
China Inst Atom Energy, Beijing 102413, Peoples R China.;Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;CCAST, World Lab, Beijing 100080, Peoples R China.;Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.;[Li, Xiao-Mei] China Inst Atom Energy, POB 275 18, Beijing 102413, Peoples R China.
通讯机构：
[Li, Xiao-Mei] C;China Inst Atom Energy, POB 275 18, Beijing 102413, 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：
China Inst Atom Energy, Beijing 102413, Peoples R China.^Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.^CCAST, World Lab, Beijing 100080, Peoples R China.^Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
期刊：
International Journal of Modern Physics E,2007年16(07n08):1906-1911 ISSN：0218-3013
通讯作者：
Sa, Ben-Hao
作者机构：
[Li, Xiao-Mei; Hu, Shou-Yang; Li, Shod-Ping; Feng, Jing; Sa, Ben-Hao] China Inst Atom Energy, Beijing 102413, Peoples R China.;[Zhou, Dai-Mei] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;[Sa, Ben-Hao] China Inst Atom Energy, POB 275 18, Beijing 102413, Peoples R China.
通讯机构：
[Sa, Ben-Hao] C;China Inst Atom Energy, POB 275 18, Beijing 102413, Peoples R China.
关键词：
Heat capacity;PACIAE;QGM;HM
摘要：
<jats:p> A parton and hadron cascade model, PACIAE, is applied to follow the particle transport in both the partonic and hadronic stages of the 0–5% most central Au + Au collisions at [Formula: see text]. We have determined the specific heat of π<jats:sup>+</jats:sup> + π<jats:sup>−</jats:sup> in pure hadronic scenario (hadonic final state) and the specific heat of [Formula: see text] in pure partonic scenario (partonic initial state). The specific heat of π<jats:sup>+</jats:sup> + π<jats:sup>−</jats:sup> in hadronic scenario is nearly a factor of 1.2 smaller than that of [Formula: see text] in partonic scenario. However, the specific heat of [Formula: see text] is very hard to survive the hadronization. </jats:p>
