阿基米德Riesz空间的序拓扑

本文主要证明了阿基米德Riesz空间关于其序拓扑Riesz空间当且仅当其序拓扑是可缩的。     

网络规划中LAC区的合理划分

LAC区用于标识不同的位置区,LAC区的划分合理与否,直接关系到网络的质量,本文简要分析了影响LAC划分的不同因素,并以西安移动业务区为例,得出简要结论。     

Measurement of （di）muons from heavy flavour decay in p-p collisions at 14 TeV with ALICE at the LHC

We present the performance of the ALICE muon spectrometer for measuring the charm and beauty inclusive p t differential production cross sections via single muons and unlike-sign dimuons in proton-proton collisions at√ s = 14 TeV.     

Study of the photon identification efficiency with ALICE photon spectrometer

The efficiency for the detection and identification of photons with the ALICE PHOton Spectrometer PHOS has been studied with the Monte-Carlo generated data. In particular, the influence on the efficiency of the PHOS-module edge-effect and of the material in front of PHOS have been examined.     

基于改进方位弯折的一维距离像雷达目标识别

传统的基于方位弯折算法对一维距离像进行目标识别时,测试数据与参考距离像序列的动态弯折在端点对齐的情况下才能进行。针对传统动态方位弯折端点严格约束的局限性,提出一种端点松弛的算法,采用一种改进的基于方位弯折算法,实现雷达目标的识别。对三种飞机的实测数据进行了仿真实验,结果表明该方法的有效性。     

ADS5270及其在光子谱仪中的应用

随着高能物理实验中粒子加速器能级的不断提高,探测器的规模逐渐增大,探测器对前端电子设备中信号采集电路的性能和速度的要求也越来越高.介绍了高速串行模敷转换器ADS5270的工作原理、主要特性及应用电路.着重讨论了光子谱仪中ADS5270接口电路的设计和ADS5270在应用中的噪声耦合、复位和时钟停止问题.     

Jet shape modification at LHC energies by JEWEL

Jet shape measurements are employed to explore the microscopic evolution mechanisms of parton-medium interaction in ultra-relativistic heavy-ion collisions. In this study, jet shape modifications are quantified in terms of the fragmentation function F(z), relative momentum p_T~(rel), density of charged particles p(r), jet angularity girth, jet momentum dispersion p_T~(disp),and LeS ub for proton-proton(pp) collisions at 0.9, 2.76. 5.02, 7,and 13 TeV, as well as for lead-lead collisions at 2.76 TeV and 5.02 TeV by JEWEL. A differential jet shape parameter Dgirth is proposed and studied at a smaller jet radius r 0.3. The results indicate that the medium has the dominant effect on jet shape modification, which also has a weak dependence on the center-of-mass energy. Jet fragmentation is enhanced significantly at very low z 0.02, and fragmented jet constituents are linearly spread to larger jet-radii for p_T~(rel) 1. The waveform attenuation phenomena is observed in p_T~(rel),girth, and Dgirth distributions. The results obtained for D_(girth) from pp to Pb + Pb, where the wave-like distribution in pp collision is ahead of Pb + Pb collisions at small jetradii, indicates a strong medium effect.     

粲夸克辐射的死区效应

基于轻夸克辐射能量谱, 考虑夸克质量对部分子辐射能量损失的影响, 利用死区因子把轻部分子辐射能量损失谱推广到重部分子辐射能量损失的情形. 研究结果表明, 利用与夸克质量相关的死区因子推广轻夸克辐射能量损失谱得到的重夸克辐射能量损失谱, 与直接利用微扰QCD计算所得到的Djordjevic-Gyulassy(D-G)谱的结果一致, 且极大简化了重夸克辐射能量损失的计算.