排序方式: 共有14条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
6.
The multi-source pion interferometry in relativistic heavy-ion collisions is presented and two-source models for hadron gas and hadron gas plus quark-gluon plasma are proposed. The models can resolve the HBT puzzle. For the same $q$ and different direction of \bar{q}, the two-pion correlation functions show characteristic oscillation behaviors, which may be used to distinguish the two-source models. Our research also showes that the multi-source pion correlations can resolve the HBT puzzle. 相似文献
7.
Two-pion interferometry at small relative momentum for pion sources with transverse and longitudinal expansions in relativistic heavy ion collisions 下载免费PDF全文
A two-pion correlation function at small relative momentum for pion sources with transverse and longitudinal expansions in relativistic heavy ion collisions is obtained using two-pion interferometry at small relative momentum, and the relations between the real and apparent parameters of the pion source are given. The relations can be used to extract both the temperature and the transverse and longitudinal expansion velocities of pion sources and to verify the correctness of relativistic transformation T′=T\sqrt {1-v^2} of temperature in relativistic statistical mechanics and thermodynamics. 相似文献
8.
“中共中央关于教育体制改革的决定”发表以来,高等教育界开展了一系列的改革尝试,国家在扩大高等学校办学自主权的同时,需要加强对高等教育的宏观指导和管理,逐步建立适合我国国情的高等教育评估制度.目前在国家教委统一布署下,正在着手进行高等工程教育评估的初步试点工作.“大学物理”(即工科普通物理)课程评估的首次试点实测工作已于1986年8月初在黑龙江省初步告一段落.这次实测工作取得了一些初步的经验和教训,使我们从课程评估的初次实践中使认识深入了一步,下面谈谈几点体会. 一、课程评估的目的和意义.教育评估就是对教育的社会价值… 相似文献
9.