Long-strip multi-gap resistive plate chamber(LMRPC) were built with(Module 1) or without(Module 2) adhesive tapes and silicones.Their performances were investigated by working gas mixtures of different gradient conten...Long-strip multi-gap resistive plate chamber(LMRPC) were built with(Module 1) or without(Module 2) adhesive tapes and silicones.Their performances were investigated by working gas mixtures of different gradient contents(Test 1:94%freon,5%iso-butane and 1%SF_6;Test 2:90%freon,5%iso-butane and 5%SF_6).Both the modules achieved 100%efficiency,with time resolutions of 75 and 70 ps.Comparatively,the Module 1 works with a lower applied HV at the higher noise level,and time resolution was not influenced greatly by the adhesive tapes and silicones.展开更多
目的测量模拟长期载人航天飞行中不同典型身体活动的能量代谢率,并使用代谢当量进行活动负荷分级。方法使用能量代谢测试舱测量23名受试者模拟航天飞行中的典型活动的能量代谢率,并计算代谢当量,通过与国内外标准比较与方差分析结果进...目的测量模拟长期载人航天飞行中不同典型身体活动的能量代谢率,并使用代谢当量进行活动负荷分级。方法使用能量代谢测试舱测量23名受试者模拟航天飞行中的典型活动的能量代谢率,并计算代谢当量,通过与国内外标准比较与方差分析结果进行负荷分级讨论。结果"阅读"、"网页浏览"、"医监医保"、"仪表监视"、"舱室日常照料"、"平板电脑游戏"代谢范围在444.45~650.06 k J/h,6种锻炼活动代谢范围在1104.59~1748.99 k J/h,6种锻炼后个人卫生整理代谢范围在524.04~624.17k J/h。方差分析表明,"阅读"、"网页浏览"、"平板电脑游戏"3种活动代谢当量间无统计学差异,中等强度与低强度锻炼方案无统计学差异,同一锻炼项目不同方案的个人卫生整理间代谢当量无统计学差异。结论根据代谢测量与代谢当量的比较结果建议将航天飞行典型动作分为"轻松状态"、"轻度负荷活动"、"中度负荷活动"三个等级,其中锻炼活动的代谢等级应根据个人测量情况设计。展开更多
A prototype of multi-gap resistive plate chamber (MRPC) modules with 6 gas gaps of 220 μm used for the time-of-flight (TOF) detectors has been developed by STAR TOF group. A tray (TOFr) composed of 28 MRPC modules wa...A prototype of multi-gap resistive plate chamber (MRPC) modules with 6 gas gaps of 220 μm used for the time-of-flight (TOF) detectors has been developed by STAR TOF group. A tray (TOFr) composed of 28 MRPC modules was constructed and operated in STAR for the d+Au collisions and Au+Au collisions during 2003 RHIC and 2004 RHIC run. Results show its time resolution is 85 ps with the average efficiency of 95% and clear identification of K/π up to 1.6 GeV and proton/ K up to 3.0 GeV.展开更多
The principle of the method for the BESⅢ event start time determination and the code construction are described. The investigation of influence of the noise, the method of rejecting noise and the performance checking...The principle of the method for the BESⅢ event start time determination and the code construction are described. The investigation of influence of the noise, the method of rejecting noise and the performance checking by the Monte Carlo physics data sample are also presented. The preliminary results got from the Monte Carlo simulation are presented, the reconstruction efficiency of J/ψ → anything events at noise level 0 - 60% can achieve above 99%, and the error rate is below 1%.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No.11020101059,10775082,11050110111 and 10979030
文摘Long-strip multi-gap resistive plate chamber(LMRPC) were built with(Module 1) or without(Module 2) adhesive tapes and silicones.Their performances were investigated by working gas mixtures of different gradient contents(Test 1:94%freon,5%iso-butane and 1%SF_6;Test 2:90%freon,5%iso-butane and 5%SF_6).Both the modules achieved 100%efficiency,with time resolutions of 75 and 70 ps.Comparatively,the Module 1 works with a lower applied HV at the higher noise level,and time resolution was not influenced greatly by the adhesive tapes and silicones.
文摘目的测量模拟长期载人航天飞行中不同典型身体活动的能量代谢率,并使用代谢当量进行活动负荷分级。方法使用能量代谢测试舱测量23名受试者模拟航天飞行中的典型活动的能量代谢率,并计算代谢当量,通过与国内外标准比较与方差分析结果进行负荷分级讨论。结果"阅读"、"网页浏览"、"医监医保"、"仪表监视"、"舱室日常照料"、"平板电脑游戏"代谢范围在444.45~650.06 k J/h,6种锻炼活动代谢范围在1104.59~1748.99 k J/h,6种锻炼后个人卫生整理代谢范围在524.04~624.17k J/h。方差分析表明,"阅读"、"网页浏览"、"平板电脑游戏"3种活动代谢当量间无统计学差异,中等强度与低强度锻炼方案无统计学差异,同一锻炼项目不同方案的个人卫生整理间代谢当量无统计学差异。结论根据代谢测量与代谢当量的比较结果建议将航天飞行典型动作分为"轻松状态"、"轻度负荷活动"、"中度负荷活动"三个等级,其中锻炼活动的代谢等级应根据个人测量情况设计。
基金Supported by National Foundation of Natural Sciences of China (10375062)
文摘A prototype of multi-gap resistive plate chamber (MRPC) modules with 6 gas gaps of 220 μm used for the time-of-flight (TOF) detectors has been developed by STAR TOF group. A tray (TOFr) composed of 28 MRPC modules was constructed and operated in STAR for the d+Au collisions and Au+Au collisions during 2003 RHIC and 2004 RHIC run. Results show its time resolution is 85 ps with the average efficiency of 95% and clear identification of K/π up to 1.6 GeV and proton/ K up to 3.0 GeV.
基金CAS Knowledge Innovation Project (U-602,U-34)National Natural Science Foundation of China (10491300,10491303,10605030)100 Talents Program of CAS (U-25,U-54)
文摘The principle of the method for the BESⅢ event start time determination and the code construction are described. The investigation of influence of the noise, the method of rejecting noise and the performance checking by the Monte Carlo physics data sample are also presented. The preliminary results got from the Monte Carlo simulation are presented, the reconstruction efficiency of J/ψ → anything events at noise level 0 - 60% can achieve above 99%, and the error rate is below 1%.
