设计和研制了一种简便的宇宙线μ子寿命测量的实验装置.该装置采用大面积闪烁体探测器,利用可编程逻辑阵列(field program mable gatearray,FPGA),并通过电子学脉冲计数法,实现对宇宙线μ子的衰变寿命测量.测量结果与文献中给出μ子寿...设计和研制了一种简便的宇宙线μ子寿命测量的实验装置.该装置采用大面积闪烁体探测器,利用可编程逻辑阵列(field program mable gatearray,FPGA),并通过电子学脉冲计数法,实现对宇宙线μ子的衰变寿命测量.测量结果与文献中给出μ子寿命精确值比较,误差小于3.5%.该实验原理及测量方法简单,测量条件要求不高,可用于大学物理实验教学.相关实验方法也可应用到其他一些粒子寿命及时间测量的实验中.展开更多
采用抑郁自评量表(Self-Rating Depression Scale,SDS)、信任他人量表(Trust in People,TiP)以及自制人口学调查问卷,对民族地区某高校在校本科生进行了抽样调查,结果显示,抑郁率为35.7%,性别、年级、专业、居住环境、家庭状况、经济状...采用抑郁自评量表(Self-Rating Depression Scale,SDS)、信任他人量表(Trust in People,TiP)以及自制人口学调查问卷,对民族地区某高校在校本科生进行了抽样调查,结果显示,抑郁率为35.7%,性别、年级、专业、居住环境、家庭状况、经济状况、个性特征以及精神疾病家族史与抑郁呈显著相关.建议积极关注大学生抑郁状况,提前干预抑郁情绪,以促进大学生心理健康发展.展开更多
The discovery of the Higgs boson with its mass around 125 GeV by the ATLAS and CMS Collaborations marked the beginning of a new era in high energy physics.The Higgs boson will be the subject of extensive studies of th...The discovery of the Higgs boson with its mass around 125 GeV by the ATLAS and CMS Collaborations marked the beginning of a new era in high energy physics.The Higgs boson will be the subject of extensive studies of the ongoing LHC program.At the same time,lepton collider based Higgs factories have been proposed as a possible next step beyond the LHC,with its main goal to precisely measure the properties of the Higgs boson and probe potential new physics associated with the Higgs boson.The Circular Electron Positron Collider(CEPC)is one of such proposed Higgs factories.The CEPC is an e^+e^- circular collider proposed by and to be hosted in China.Located in a tunnel of approximately 100 km in circumference,it will operate at a center-of-mass energy of 240 GeV as the Higgs factory.In this paper,we present the first estimates on the precision of the Higgs boson property measurements achievable at the CEPC and discuss implications of these measurements.展开更多
多形性胶质母细胞瘤(glioblastoma multiforme,GBM)是一种常见的成人中枢神经系统的原发性恶性脑瘤。由于患者预后较差,导致中位生存期常小于1年,而主要治疗药物替莫唑胺(temozolomide,TMZ)的耐药是GBM治疗失败的主要原因。抗GBM药物通...多形性胶质母细胞瘤(glioblastoma multiforme,GBM)是一种常见的成人中枢神经系统的原发性恶性脑瘤。由于患者预后较差,导致中位生存期常小于1年,而主要治疗药物替莫唑胺(temozolomide,TMZ)的耐药是GBM治疗失败的主要原因。抗GBM药物通常被分为经美国食品和药品监督管理局(Food and Drug Administration,FDA)批准上市药物、处于临床阶段的候选药物以及处于临床前研究阶段的活性化合物。目前,有4种药物经FDA批准上市,临床使用的一线药物主要是TMZ,其他药物因其毒性和副作用或药效较低而使用较少。分别对GBM治疗药物的药理作用、作用机制、临床试验和不良反应等方面进行介绍。展开更多
文摘设计和研制了一种简便的宇宙线μ子寿命测量的实验装置.该装置采用大面积闪烁体探测器,利用可编程逻辑阵列(field program mable gatearray,FPGA),并通过电子学脉冲计数法,实现对宇宙线μ子的衰变寿命测量.测量结果与文献中给出μ子寿命精确值比较,误差小于3.5%.该实验原理及测量方法简单,测量条件要求不高,可用于大学物理实验教学.相关实验方法也可应用到其他一些粒子寿命及时间测量的实验中.
文摘采用抑郁自评量表(Self-Rating Depression Scale,SDS)、信任他人量表(Trust in People,TiP)以及自制人口学调查问卷,对民族地区某高校在校本科生进行了抽样调查,结果显示,抑郁率为35.7%,性别、年级、专业、居住环境、家庭状况、经济状况、个性特征以及精神疾病家族史与抑郁呈显著相关.建议积极关注大学生抑郁状况,提前干预抑郁情绪,以促进大学生心理健康发展.
基金Supported by the National Key Program for S&T Researh and Development(2016YFA0400400)CAS Center for Excellence in Particle Physics+12 种基金Yifang Wang’s Science Studio of the Ten Thousand Talents Projectthe CAS/SAFEA International Partnership Program for Creative Research Teams(H751S018S5)IHEP Innovation Grant(Y4545170Y2)Key Research Program of Frontier Sciences,CAS(XQYZDY-SSW-SLH002)Chinese Academy of Science Special Grant for Large Scientific Project(113111KYSB20170005)the National Natural Science Foundation of China(11675202)the Hundred Talent Programs of Chinese Academy of Science(Y3515540U1)the National 1000 Talents Program of ChinaFermi Research Alliance,LLC(DE-AC02-07CH11359)the NSF(PHY1620074)by the Maryland Center for Fundamental Physics(MCFP)Tsinghua University Initiative Scientific Research Programthe Beijing Municipal Science and Technology Commission project(Z181100004218003)
文摘The discovery of the Higgs boson with its mass around 125 GeV by the ATLAS and CMS Collaborations marked the beginning of a new era in high energy physics.The Higgs boson will be the subject of extensive studies of the ongoing LHC program.At the same time,lepton collider based Higgs factories have been proposed as a possible next step beyond the LHC,with its main goal to precisely measure the properties of the Higgs boson and probe potential new physics associated with the Higgs boson.The Circular Electron Positron Collider(CEPC)is one of such proposed Higgs factories.The CEPC is an e^+e^- circular collider proposed by and to be hosted in China.Located in a tunnel of approximately 100 km in circumference,it will operate at a center-of-mass energy of 240 GeV as the Higgs factory.In this paper,we present the first estimates on the precision of the Higgs boson property measurements achievable at the CEPC and discuss implications of these measurements.
文摘多形性胶质母细胞瘤(glioblastoma multiforme,GBM)是一种常见的成人中枢神经系统的原发性恶性脑瘤。由于患者预后较差,导致中位生存期常小于1年,而主要治疗药物替莫唑胺(temozolomide,TMZ)的耐药是GBM治疗失败的主要原因。抗GBM药物通常被分为经美国食品和药品监督管理局(Food and Drug Administration,FDA)批准上市药物、处于临床阶段的候选药物以及处于临床前研究阶段的活性化合物。目前,有4种药物经FDA批准上市,临床使用的一线药物主要是TMZ,其他药物因其毒性和副作用或药效较低而使用较少。分别对GBM治疗药物的药理作用、作用机制、临床试验和不良反应等方面进行介绍。