Pseudorapidity distribution of multiplicity in Au+Au collisions at √sNN=200GeV

Using the Glauber model, we discuss the number of binary nucleon-nucleon collisions in heavy-ion collisions. Based on the latter, after considering the effect of energy loss of the nucleons in multiple collisions, we derive the pseudorapidity distribution of the multiplicity as a function of the impact parameter in nucleus-nucleus collisions. Using this, we analyze the experimental measurements carried out by the BRAHMS Collaboration in Au+Au collisions at √s_NN=200GeV. The results are in good agreement with the experimental observations.     

高能核-核碰撞末态产生粒子的赝快度分布

利用Glauber模型,讨论了重离子碰撞中的核子-核子碰撞数,并以此为基础,考虑了碰撞中核子的能量损失效应,给出了核-核碰撞末态多重数的赝快度分布随碰撞参数的变化方程.并用其分析了BRAHMS合作组在√sNN=200 GeV的Au+Au碰撞中的实验测量,所得结果与实验相符合.     

高能Au+Au碰撞末态多重数赝快度分布研究

利用Glauber模型,计算出核核碰撞中的参与者数、旁观者数及二元核子核子碰撞数.考虑到能量损失和旁观者效应对末态带电粒子赝快度分布的影响,通过对核子核子碰撞快度分布的逐次叠加得到核核碰撞末态带电粒子的赝快度分布.并用其讨论了PHOBOS合作组在高能Au+Au碰撞所做的实验测量.理论与实验结果符合得很好.     

高能核-核碰撞未态产生粒子的赝快度分布

利用Glauber模型,讨论了重离子碰撞中的核子-核子碰撞数,并以此为基础,考虑了碰撞中核子的能量损失效应,给出了核-核碰撞末态多重数的赝快度分布随碰撞参数的变化方程．并用其分析了BRAHMS合作组在√SNN=200GeV的Au＋Au碰撞中的实验测量,所得结果与实验相符合。     

Charged-particle pseudorapidity distributions in Au+Au collisions at RHIC

Using the Glauber model, we present the formulas for calculating the numbers of participants, spectators and binary nucleon-nucleon collisions. Based on this work, we get the pseudorapidity distributions of charged particles as the function of the impact parameter in nucleus-nucleus collisions. The theoretical results agree well with the experimental observations made by the BRAHMS Collaboration in Au＋Au collisions at √^SNN=200 GeV in different centrality bins over the whole pseudorapidity range.     

Pseudorapidity distribution of multiplicity in Au Au collisions at (S_(NN))~(1/2)=200 GeV

Using the Glauber model,we discuss the number of binary nucleon-nucleon collisions in heavy-ion collisions.Based on the latter,after considering the effect of energy loss of the nucleons in multiple colli- sions,we derive the pseudorapidity distribution of the multiplicity as a function of the impact parameter in nucleus-nucleus collisions.Using this,we analyze the experimental measurements carried out by the BRAHMS Collaboration in Au Au collisions at Pseudorapidity distribution of multiplicity in Au Au collisions at (S_(NN))~(1/2)=200 GeV)=200 GeV.The results are in good agreement with the experi- mental observations.     

公路行业人力资源管理存在的问题及对策

在市场经济条件下，提高公路行业人力资源管理工作水平是增强行业竞争能力，保障公路发展的一项基本工作。本文分析了公路行业人力资源管理中存在的问题，并提出相应的对策，从而提高公路行业的管理水平，促进公路建设又好又快发展。     

求解二阶锥绝对值方程组的非单调光滑牛顿算法

本文提出了求解二阶锥绝对值方程组(SOCAVE)的非单调光滑牛顿算法.在适当的条件下分析了算法的全局收敛性和局部二次收敛性.数值结果表明用非单调光滑牛顿算法求解SOCAVE是可行且高效的.