科研成果

该文考察了我国现有高等院校布局的基本情况,并结合大学生区域流动,分析由此所引发的影响人才流动状况.研究发现:高等院校的区域布局不仅会影响当地学生接受高等教育机会的可能性和公平性,而且还会影响当地经济发展以及人才供给.为此该文提出,应充分重视高等院校布局在带动区域经济发展中的作用,在进行高等院校布局调整尤其是新建高等学校时,充分考虑人才流动方向.

过去认为奥运会以后可能会出现萧条,是因为奥运会之前有很多和奥运会有关的基础设施投资,奥运会结束以后,基础设施的投资结束,因此投资可能会放缓,但是中国不会

2008年7月9日下午,《中国改革30年》新书发布暨2008经济问题点评会在北京大学光华管理学院举行。茅于轼、樊纲、陈志武、周其仁、张维迎5位经济学家出席发布会并对2008中国经济热点问题进行了权威解读。《中国改革30年》一书是中国最具影响力的经济学者对改革开放30年的回顾、思考、评价、展望,以及对话与交锋。本文选摘了他们的部分观点以飨读者。

从基础理论、图书馆学教育、信息组织、用户研究、公共图书馆服务体系、学术图书馆变革等方面探讨2007年图书馆学的一些热点问题,如"核心价值"研究、MARC的未来、公共图书馆服务体系、新一轮学术馆员制度建设以及图书馆2.0等.

要理解中国过去30年的经济改革及其成就,有五个转变最关键:第一,资源配置信号由计划指标转向市场价格。第二,经济决策的主体由政府官员转向

Real-time measurements of acidic trace gases (HCl, HNO(3), HONO, and SO(2)), ammonia, and water-soluble ions in PM(2.5) were conducted at Xinken, a coastal site downwind of Guangzhou, from 4 October to 4 November 2004, as part of the Pearl River Delta (PRD) intensive field campaign. The average concentrations of HCl, HONO, HNO(3), SO(2), and NH(3) are 2.8, 2.9, 6.3, 55.4, and 7.3 mu g m(-3) respectively, and 2.4, 7.2, 24.1, and 9.2 mu g m(-3) for Cl(-), NO(3)(-), SO(4)(2-), and NH(4)(+) in PM(2.5). The diurnal variations of both HCl and HNO(3) showed higher concentrations during daytime and lower concentrations at night, and aerosol Cl(-) and NO(3)(-) showed an opposite diurnal patterns to HCl and HNO(3). The diurnal variation of NH(3) showed the similar pattern to that of aerosol NH(4)(+) with lower concentration during daytime and higher concentration at night. The average concentration of SO(2) during daytime was higher than that at night. The transportation of urban plumes to the sampling site could explain the higher concentration of SO(2) during daytime. HONO showed a clear diurnal variation with lower concentration during daytime and higher concentration at night. The HONO concentrations were positively correlated with the particle surface area concentrations, suggesting the formation of HONO through the heterogeneous conversion on particle surfaces could be significant. The ionic charge balance analysis included the cations derived from filter measurements indicates that the contribution of the cations in fine particle (PM(1.8)) to the charge balance is not pronounced. The theoretical equilibrium constant (K(e)) of NH(4)NO(3) is higher than the observed concentration product (K(m) = [NH(3)] x [HNO(3)]) during daytime, and lower than K(m) at night. This indicates that the atmospheric conditions during the sampling period did not favor the formation of NH(4)NO(3) during daytime. (c) 2008 Elsevier Ltd. All rights reserved.