利用载荷减少引起的湖底变形探讨西藏古大湖演变史

西藏可能曾存在一个面积达15万平方公里的“古大湖”，当古大湖的湖水流失时，地壳会因为载荷减少而产生形变，造成岩石层的回弹和倾斜，考察因此而产生的湖相沉积物间不整合角能为古大湖的研究提供新的佐证。本文通过简化的力学模型计算证明，湖水减少引起的湖底倾斜量微不足道、难以观测，总的变形量也不大，仅数十米，但这种抬升速率可能极其迅速，其环境、气候、地貌等方面的效应值得进一步研究。     

改进挣值法在大型科研项目进度—成本管理的应用

采用一种基于关键线路的改进挣值法,通过在某大型科研项目实施管理中的应用,印证改进的必要性和良好的管理效果。     

A large-scale donor attempt to improve educational status of the poor and household income distribution: The experience of PEDC in Vietnam

In 2003, donors combined together in Vietnam to support the provision of quality primary schooling for 226 disadvantaged districts (about a third of the country). US$160 million was invested in infrastructure, materials and training across the 226 districts. The programme has been commended by donors and received good press inside Vietnam. Comparison of achievement surveys in 2001 and 2007 showed, however, that there had been a decline in performance in the targeted districts. This article explores various hypotheses as to how this could have happened; and in particular the increasing amounts spent by better-off households on their children's education.     

Prior learning in biology at high school does not predict performance in the first year at university

Students in their first year of university face a number of transition issues that can make realising their academic potential difficult. In the sciences, first-year courses cover a large amount of material across broad subject areas, which can make them troublesome for students without background knowledge, and students need to adapt to typically large class sizes and develop active, independent learning skills. We expected a student's prior learning to be important to their academic performance in a large, first-year introductory biology subject and analysed the relationships between students' results in this course with their senior high school results in related subjects over three years from 2007 to 2009. We predicted that students with prior learning in biology would have higher results than those without it, but that chemistry might also be important, given the biochemical nature of much of the course content. Students who completed biology at the senior high school-level did perform better than those who had not, but only if they also completed chemistry. Prior learning in biology was of no benefit to students in first-year biology, except when combined with chemistry, suggesting that potential differences in biology curricula between high school and the first year at university may need to be addressed.     

增强思想政治理论课大课教学实效性研究

高校思想政治理论课是大学生思想政治教育的主渠道,针对目前思想政治理论课大课教学实效性不足的现状,要切实增强大课教学的效果,加强课堂教学组织管理是前提,改进教学方法手段是基础,增强课堂教学的针对性是关键,规范实践教学是有效途径,创新考试方法是重要保证。     

大型体育赛事对区域社会体育发展的影响——以广州亚运会为例

为了探讨大型体育赛事对区域社会体育发展的影响,以广州亚运会为例,采用文献资料、问卷调查、数理统计以及逻辑分析等研究方法,论证了大型体育赛事给区域社会体育的发展带来了更大的经济效益;提高了政府的管理;改善了公众锻炼意识和基础设施;增强区域社会体育的受关注度,丰富了活动形式。继而在此基础上提出促进我国区域社会体育发展的建议,旨在实现我国区域社会体育的全面可持续发展。     

大中型工业企业技术创新投资演化行为分析

为了揭示大中型工业企业技术创新投资的演化行为与规律,构建了一个以差分形式表示的企业技术创新投资经济增长非线性动力学模型。采用差分演化算法对模型进行了参数优化并进行了计算机模拟。主要结论是:1企业的人均研发经费投入与科技活动人员比率对企业技术创新投资系统经济增长的演化行为有着决定性的影响,可以通过调节二者的值来改变系统的演化特性;2对二者的调节应在一定范围内进行;3并不是二者的值越大就必然导致企业人均工业增加值的上升;4当二者的值增大到一定条件会出现系统演化行为的分岔,分岔后会出现两种决然不同的结果,并最终进入混沌状态;5随着二者的值不断增大,系统进入分岔与走向混沌的速度也不断加快。     

吉林油田浅气层区块钻井施工井控安全对策

吉林油田浅气层区块较多,井控风险高,井喷失控后造成的危害较大。文章对该油田浅气层特点、分布及形成原因、存在的危害进行简要分析,提出加强井控防范意识、严格落实一次井控措施、早期发现早期处理、提高班组应对突发险情的防喷处置能力、发现溢流及时关井、关井后节流循环、压井恢复井筒内压力平衡等应对措施,对浅气层钻井施工井控安全工作有一定的指导作用。     

白云金矿接替资源勘查成果的简评及意义

白云金矿接替资源勘查项目共布设22条勘查线,实施49个钻孔,控制网度160米×160米,金资源量估算严格按照《岩金矿地址勘查规范》要求执行,共计探获333级别金金属量15777千克。结合外围相邻金矿区,无疑已经构成了一个特大型金矿床。白云金矿接替资源勘查为保障辽宁基础工业冶炼加工原料供求,推动辽宁老工业基地振兴,做出了重大的历史性贡献。     

大型体育场馆市场化运营的体制性障碍研究

采用文献资料、专家访谈和问卷调查等方法就场馆市场化运营的体制性障碍进行了分析,认为主要表现在产权不清晰,国有资产管理体制不完善,投融资体制改革滞后,事业单位管理体制,监管约束机制尚不健全,经营自主权受限,运营政策不合理等方面.提出继续推行场馆投融资体制改革,吸引民间资本参与场馆市场化运营;场馆以赛后设计为主,积极融入城市;稳步推进场馆管理体制改革;建立体育场馆出资人制度,细化体育场馆运营政策等促进场馆市场化运营的建议.