特低渗透油藏 CO2 驱室内实验研究

针对大庆外围油田特低渗透油藏剩余油潜力大、井网加密效益差、水驱采收率低等问题，提出了特低渗透油藏 CO2驱技术。通过细管实验和天然岩芯 CO2 驱油实验，确定了 CO2 与高台子油田原油的最小混相压力，评价了特低渗透砂岩油藏 CO2 驱油效果。实验结果表明，CO2 驱可以应用于高台子油田，并取得较好的驱油效果。当天然岩芯空气渗透率为0.58 mD 时，在水驱基础上，气驱可以进一步提高采收率 8% 以上，特低渗透油藏实施 CO2 驱油技术是可行的。     

THE INEFFICIENCY OF WORKER TIME USE

Much work is carried out in short, interrupted segments. This phenomenon, which we label task juggling, has been overlooked by economists. We study the work schedules of some judges in Italy documenting that they do juggle tasks and that juggling causally lowers their productivity substantially. To measure the size of this effect, we show that although all these judges receive the same workload, those who juggle more trials at once instead of working sequentially on few of them at each unit of time, take longer to complete their portfolios of cases. Task juggling seems to have no adverse effect on the quality of the judges' decisions, as measured by the percent of decisions appealed. To identify these causal effects we estimate models with judge fixed effects and we exploit the lottery assigning cases to judges. We discuss whether task juggling can be viewed as inefficient, and provide a back‐of‐the‐envelope calculation of the social cost of longer trials due to task juggling.     

基于历史法和零和DEA方法的用能权与碳排放权初始分配研究

本文引入了同时考虑用能权与碳排放权初始分配的零和DEA方法,从公平与效率视角对比分析了历史法与零和DEA方法两种分配方式的适用性,并应用市场交易模型检验了不同初始分配方式对各地区交易行为的影响。研究结果表明,零和DEA方法能够提高用能权与碳排放权初始分配的公平性,但却是以牺牲前沿技术效率水平为代价。其次,完善的市场机制能够提高基于零和DEA方法调配用能权与碳排放权的配置效率,生产技术水平较高的地区可以通过出售多余的用能权和碳排放权来获得额外收益,有利于促进绿色技术创新;相反,历史法容易导致高耗能、高排放的地区在初始分配中获得较多的用能权和碳排放权,不利于正向促进技术进步。最后,当市场机制不完善时,基于零和DEA方法配置用能权和碳排放权,可能会抑制技术进步,而基于历史法的初始分配方式则至少可以在短期内维持现有生产技术水平。     

高校公共体育课“2S”教学理念的提出与实施

依据“健康第一”、“以人为本”的理念,结合体育教学基本理论,针对我国大学生体质健康状况急剧下降的严峻形式,创造性地提出高校公共体育“2S”教学理念,强调“微笑”与“出汗”的相互融合。该教学理念重视快乐体育教学模式、成功体育教育模式的价值,突出教学内容专项化,教学过程的科学负荷,教学方法的多样化,强调教学组织以学生为主体,教学评价重视过程评价。     

信任危机、逆向选择与品牌重建——来自网贷之家的经验证据

以中国P2P行业信任危机为背景,借助网贷之家公布的数据,利用面板固定效应模型研究信任缺失情形下的逆向选择问题以及政府和行业协会重建品牌信任的效果,结果表明:P2P行业信任危机下的平台旨在通过建设品牌形象来吸引投资人与借款人的做法是徒劳的,信任缺失导致合规平台的诚信经营并不为公众所认可,长此以往这些平台很可能会退出市场,进而引发逆向选择问题;自上而下的制度建设在重建品牌信任中取得了可喜的成绩,有效缓解并逆转了P2P行业的逆向选择问题,且市场整治初见成效。此研究成果对于目前正在进行的P2P行业整顿具有十分现实的指导意义。     

“海丝”战略背景下闽台海洋经济融合发展研究

党中央在新时期作出的共建21世纪海上丝绸之路的战略决策,对深化区域合作、推动全球经济发展具有重大的影响,更为闽台海洋经济融合发展提供了难得机遇。系统梳理和回顾改革开放以来闽台海洋经济合作的历程及成效,分析21世纪海上丝绸之路战略背景下闽台海洋经济融合发展的新机遇,提出闽台两地应充分发挥优势互补,坚持互利共赢原则,全面加强海洋渔业、航港造船产业、海洋科技产业和海洋观光游憩业的融合发展,共同推动闽台海洋开发合作向纵深发展。     

Analysis of child labour in Peru and Pakistan: A comparative study

This paper analyses child labour participation and its key determinants using data sets from Peru and Pakistan. The results include tests of the ‘Luxury’ and ‘Substitution’ hypotheses that play key roles in recent studies on child labour and child schooling. The results reject both hypotheses in the context of child labour in Pakistan and suggest that income and related variables do not have the expected negative effect on children's work input. Rising wages of adult female labour in Pakistan, and falling adult male wage in Peru lead to increased participation of children in the labour market. The results on the combined country data formally establish the presence of strong individual country effects in the estimated regressions. For example, ceteris paribus, a Peruvian child is more likely to experience schooling than a Pakistani child. However, both countries agree on the positive role that adult female education and infrastructure investment in basic amenities can play in discouraging child labour and encouraging child schooling. Received: 24 August 1998/Accepted: 10 March 1999     

从《爬行纲分类》课件开发中探讨CAI课件的设计和创作策略

通过对MCAI课件《爬行纲分类》的制作,探讨了在设计MCAI课件时所需要注意的问题。     

姓名称谓的汉语表达

姓名称谓是整个称谓系统中的重要组成部分 ,姓名称谓在汉语表达中常以其特定的变称形式出现 ,且每种变称形式都各有其表意特色 ,外来语姓名称谓也受此影响而“汉化”。姓名称谓的汉语表达具有鲜明的时代性和民族性 ,文化心态、语体风格等都对它有着一定的影响