依概率收敛与依分布收敛的关系

本文探讨了随机变量序列依概率收敛与依分布收敛的关系 ,并给出了一个依分布收敛能保证依概率收敛的最弱的条件 ,即 :设分布函数列 { Fn(x) }弱收敛于连续的分布函数 F(x) ,则存在随机变量序列{ξn}和随机变量ξ,它们分别以 { Fn(x) }和 F(x)为其对应的分布函数列和分布函数 ,且 {ξn}依概率收敛于ξ.     

Limits on light WIMPs with a 1 kg-scale germanium detector at 160 eVee physics threshold at the China Jinping Underground Laboratory

We report results of a search for light weakly interacting massive particle(WIMP) dark matter from the CDEX-1 experiment at the China Jinping Underground Laboratory(CJPL). Constraints on WIMP-nucleon spin-independent(SI) and spin-dependent(SD) couplings are derived with a physics threshold of 160 eVee, from an exposure of 737.1 kg-days. The SI and SD limits extend the lower reach of light WIMPs to 2 GeV and improve over our earlier bounds at WIMP mass less than 6 GeV.     

《空间解析几何》课程双语教学的实践与思考

以中英国际合作办学项目为平台,进行了《空间解析几何》课程的双语教学实践.本文,从双语课程的教学目标、双语教材的选择、教学理念和教学模式、作业与考试考核要求、知识点拓展资料的选择等五个方面论述了该课程进行双语教学实践中碰到的问题和取得的经验.     

Measurement of cosmic ray flux in the China JinPing underground laboratory

The China JinPing underground Laboratory (CJPL) is the deepest underground laboratory running in the world at present. In such a deep underground laboratory, the cosmic ray flux is a very important and necessary parameter for rare-event experiments. A plastic scintillator telescope system has been set up to measure the cosmic ray flux. The performance of the telescope system has been studied using the cosmic rays on the ground laboratory near the CJPL. Based on the underground experimental data taken from November 2010 to December 2011 in the CJPL, which has an effective live time of 171 days, the cosmic ray muon flux in the CJPL is measured to be (2.0±0.4)×10-10/(cm2 ·s). The ultra-low cosmic ray background guarantees an ideal environment for dark matter experiments at the CJPL.     

制药工程专业“3+1”培养应用型人才模式的探索

独立学院是我国高等教育办学的一种新模式，在高等教育大众化的进程中发挥着积极作用。2007年底，我国高等教育在校学生规模已经超过了2700万人，高等教育毛入学率达到了23％，比2006年增加了400万人。随着我国高等教育的快速发展，将会有更多的大学毕业生面向基层，服务于经济建设。因此，培养社会需要的“大众化、应用型”人才，是摆在我国高等教育工作者面前的重要课题。