论高校图书馆期刊情报资源的开发与利用

开发利用期刊情报资源 ,是衡量高校期刊工作对教学、科研及社会经济建设贡献大小和服务效果优劣的重要标志。因此 ,确定核心期刊是获得高密度情报源 ,满足读者对期刊需求的关键 ;加强期刊的基础工作 ,是开发期刊这一重要情报源的先决条件 ;开发期刊情报资源 ,深化服务层次 ,为经济建设服务。     

视界变革：从知识论与价值论美学的逻辑论起

知识论与价值论美学认为,美学研究的视界规定着美学的研究方式、成果形态和内在观念的变革.因此,转换美学的研究视界,意味着美学研究逻辑起点的变革,它主要产生三个方面的重要影响:一是对现有美学资源给予合理的结构性配置;二是促成美学知识形态的话语拓展;三是以现实性和实践性景象实现美学界限的根本突破,对人类审美文明具有重要意义.     

新中国农村四荒地资源产权运作的历史变迁

资源匮乏,人均占有资源严重不足是我国的基本国情。然而大量的四荒地资源又不能得到充分的开发利用。怎样促进四荒地资源的开发利用,是理论和实践中一个重要的经济问题。本文从农村四荒地资源产权运作的历史变迁入手,分别对三年改造时期、合作社时期、人民公社时期及改革以来农村四荒地资源的产权安排及其变迁进行了描述与评价,进而得出结论,旨在对实践中不断高涨的四荒地资源开发利用有一定的借鉴意义。     

EFFECTS OF INTERNET USE AND SOCIAL RESOURCES ON CHANGES IN DEPRESSION

We examine how people's different uses of the Internet predict their later scores on a standard measure of depression, and how their existing social resources moderate these effects. In a longitudinal US survey conducted in 2001 and 2002, almost all respondents reported using the Internet for information, and entertainment and escape; these uses of the Internet had no impact on changes in respondents' level of depression. Almost all respondents also used the Internet for communicating with friends and family, and they showed lower depression scores six months later. Only about 20 percent of this sample reported using the Internet to meet new people and talk in online groups. Doing so changed their depression scores depending on their initial levels of social support. Those having high or medium levels of social support showed higher depression scores; those with low levels of social support did not experience these increases in depression. Our results suggest that individual differences in social resources and people's choices of how they use the Internet may account for the different outcomes reported in the literature.     

积极进行教学资源建设全面推进教学改革

结合国家教学基地建设,西南交通大学以力学课程体系、教学内容、教学方法、教学手段的改革为主线,以培养工科创新型人才和提高教学质量为目标,构建了先进的立体化教学资源和教学平台,在课程教学与实验教学的改革、师资队伍建设、教学环境建设等方面取得了一系列成果,在全国,特别是西南地区,起到了很好的示范与辐射作用     

烟台市水资源承载力变化的驱动力研究

阐述了水资源承载力的概念、特性及影响因素,根据烟台市各县区的统计资料,分析了烟台市自上个世纪80年代以来水资源承载力变化的总体趋势和驱动因子。结果表明:人口、社会固定资产投资和GDP是影响烟台市水资源承载力变化的主要驱动因素。通过多元线性回归模型,预测出了2005和2015年的水资源量,并进一步预测了该市的需水量和缺水量。     

毛细管顶空气相色谱法测定饮用水中的氯仿和四氯化碳

建立了用毛细管顶空气相色谱法测定饮用水中氯仿和四氯化碳的方法。色谱条件为 非极性毛细管柱(30m×0.32mm×0.25μm),柱温40℃ 汽化室温度200℃,检测器为微池电子捕获检测器 检测器温度250℃ 载气为高纯N_2 流速3.2mL/min,尾吹气流速56.8mL/min,采用不分流进样 吹扫时间0.61min,吹扫流量20mL/min。实验表明 该方法准确度高,灵敏度比国标方法大大提高,适用于饮用水中氯仿和四氯化碳的分析测定。     

唐代洛阳的水害

洛阳有伊、洛、、涧、谷等数条河流。唐代东都洛阳水灾频繁发生 ,共 35次之多 ,平均不足 1 0年一次 ,给洛阳城及沿岸造成严重破坏和损失。洛阳水灾发生多为五至八月份。唐代洛阳河流具有明显的季节性 ,雨季流量大 ,便于行舟 ,旱季水少河浅难以行船。针对频发的水灾 ,唐政府采取了一系列救助灾民的措施 ,同时还采取了加固堤坝、疏浚河道等防治措施     

A non-profit approach to addressing the effects of urbanization in the Lake Pontchartrain Basin, Louisiana

The Lake Pontchartrain Basin in southeast Louisiana is an estuarine watershed encompassing New Orleans, Baton Rouge, and wetlands that are an integral part of Louisiana's unique culture. In recent decades rapid growth and poorly planned development have resulted in a decrease in water quality and habitat loss, especially in St. Tammany Parish on the north shore of Lake Pontchartrain. In 1989, the Lake Pontchartrain Basin Foundation (LPBF), an environmental, non-profit organization, was formed to address and rectify environmental issues in the Basin. LPBF accomplishes its mission through programs addressing water quality, habitat protection, geographic information science, public access, and education.LPBF used the recent, rapid development occurring in St. Tammany Parish as a case study to examine the relationship between land use, water quality, and development in the Basin by investigating habitat change/urbanization, development in flood plains, and water quality. Through the integration of LPBF programs, it was found that urbanization is having a devastating impact on the parish's natural habitats and severely degrading water quality. Using these results, LPBF is educating Basin citizens on the protection of their habitats and water quality to insure that these resources may be available for future generations.