现代互联网环境下茶学文献的高效获取     

朱永兴  吴履平  Hervé Huang 《科技通报》2006,22(5):642-647

综述了获取茶学文献的传统方法和现代网络条件下的新途径。高效率的现代文献检索和获取途径主要包括:利用网络搜索引擎途径、电子出版物的计算机光盘检索途径、大型文献数据库的联机检索途径。文章还介绍了一些科技文献资料的网络数据库资源以及通过这些资源获取茶学文献的具体方法。  相似文献   

Informational Imperatives and Socially Mediated Relationships     

Roberta Lamb 《The Information Society》1996,12(1):17-38

Rational economic arguments focused on achieving efficient and productive IT use often guide discussions about technological infrastructure expansion. I characterize those compelling rational arguments as 'informational imperatives,' and I show that they generate unrealistic expectations based on assumptions about information resource use that do not reflect practice. My 'informational contexts' acknowledge that people value information and information resources based, in part, on the way they relate to the social world in which they live and work. If we base our expectations about information use on actual practice, would that reduce the potential economic benefit of expanding a national information infrastructure? I examine the social and organizational processes that direct IT use, and conclude that economic potential will remain high even if we alter information infrastructure policies to acknowledge and accommodate those processes that enhance expertise and foster socially mediated relationships.  相似文献   

资源经济贡献与发展诅咒的互逆关系研究——中国31个省区能源开发利用与经济增长关系的实证分析   总被引：1，自引：0，他引：1  

韩亚芬  孙根年  李琦 《资源科学》2007,29(6):188-193

资源是经济发展的物质基础,经济的发展离不开资源支持;然而,在知识经济时代和不公平的贸易下,自然资源禀赋及生产量大的地区,往往经济比较落后,呈现出"资源诅咒"现象。本文选取1985年~2004年中国各省区经济发展及能源生产/消耗的相关数据,从资源经济贡献和发展诅咒两方面进行实证研究,结果显示:经济总量大、增长速度快的省区,能源消耗量亦较大,反之,能耗就较低;能源储量丰富、生产量大的地区,往往经济发展水平及增长速度都较低,出现了"富饶的贫穷"。汇总这两方面研究,本文绘制了能源产耗和经济发展的矩阵图,将中国31个省区划分为不同类型:上海、浙江、北京等东部沿海省区,生产量最低、能源消耗量较高,经济发展水平居于我国领先地位;山西、内蒙古、陕西等中西部地区,能源生产量大、消耗量相对较低,经济发展水平比较落后;另外,河南、四川、江西等省区产耗相当,经济发展水平也随之同步变化。  相似文献   

基于混合粒子群算法的项目群工期压缩模型研究     

丰景春  赵文静  丰慧  王龙宝 《科技管理研究》2020,40(10):228-237

为完善项目群工期-费用优化模型和提高模型求解的精确性及有效性,研究并构建基于混合粒子群算法的集时间、资源和费用的工期压缩模型。首先,根据承包商一致性将工程项目群分成若干个子网络,通过对基于子网络的项目群工期压缩机理分析,剖析资源约束下工期压缩对业主支付费用的影响。其次,以业主支付费用最低为目标,构建单一资源约束下工程项目群工期压缩模型,并进行模型求解的算法设计。最后,结合南水北调江苏段东线一期工程,对其工期进行压缩,通过模型的应用和求解,得到业主支付费用最低的项目群资源调配方案和工期调整方案。研究结果显示:将资源要素考虑在内的工期-费用优化模型更加全面、详细分析工期压缩给项目群、承包商和业主带来的影响,以及人工智能算法在该目标规划模型求解中的有效应用,为项目群工期压缩问题解决提供思路和方法参考。  相似文献   

中外农业信息管理现状研究   总被引：1，自引：0，他引：1  

于涌鲲  缪小燕  高飞 《情报科学》2004,22(9):1149-1151

本文介绍了美国、加拿大等一些发达国家及中国农业信息化管理现状，并就中国农业信息管理中存在的问题，提出了相应的解决对策。  相似文献   

The validity and utility of the California Family Risk Assessment under practice conditions in the field: A prospective study     

Johnson WL 《Child abuse & neglect》2011,35(1):18-28

Objective

Analysis of the validity and implementation of a child maltreatment actuarial risk assessment model, the California Family Risk Assessment (CFRA).

Questions addressed

(1) Is there evidence of the validity of the CFRA under field operating conditions? (2) Do actuarial risk assessment results influence child welfare workers’ service delivery decisions? (3) How frequently are CFRA risk scores overridden by child welfare workers? (4) Is there any difference in the predictive validity of CFRA risk assessments and clinical risk assessments by child welfare workers?

Method

The study analyzes 7,685 child abuse/neglect reports originating in 5 California counties followed prospectively for 2 years to identify further substantiated child abuse/neglect. Measures of model calibration and discrimination were used to assess CFRA validity and compare its accuracy with the accuracy of clinical predictions made by child welfare workers. The extent of use of an override feature of the CFRA and child welfare worker reliance on CFRA risk scores for making service decisions were analyzed.

Results

Imperfect but better-than-chance predictive validity was found for the CFRA on a range of measures in a large temporal validation sample (n = 6,543). For 114 cases where both CFRA risk assessments and child welfare worker clinical risk assessments were available, the CFRA exhibited evidence of imperfect but better-than-chance predictive validity, while child welfare worker risk assessments were found to be invalid. Child welfare workers overrode CFRA risk assessments in only 114 (1.5%) of 7,685 cases and provided in-home services in statistically significantly larger proportions of higher- versus lower-risk cases, consistent with heavy reliance on the CFRA.

Conclusions/practice implications

Until research identifies actuarial models exhibiting superior predictive validity when applied in every-day practice, the CFRA is, and will be a valuable tool for assessing risk in order to make in-home service-provision decisions.  相似文献   

Management and leadership in UK universities: exploring the possibilities of change   总被引：1，自引：1，他引：0  

Matt Waring 《Journal of Higher Education Policy & Management》2017,39(5):540-558

This paper considers the case for reform of management structures in UK universities and offers proposals for change. The model of top-down, performance-led management that characterises many institutions is both outmoded and ill-suited to the challenges of an increasingly turbulent higher education sector. Drawing on the experiences of a university that introduced a new scheme of performance management, I explore alternative approaches to leadership and management, collaborative or partnership working designed to improve employee voice and the need to re-evaluate approaches to Human Resource Management. I conclude with a five-point model for change.  相似文献   

小学劳动技术教育资源实践开发的策略     

徐金玉 《天津教育》2021,(8):134-135,148

小学劳动技术教育是一门与日常生活联系紧密的课程。教师在进行教学时,要善于利用各种教育资源来全面开展劳动技术教学实践,让学生通过自己动手实践来培养自身良好的行为习惯和道德品质,锻炼自己的动手能力,增强自身的身体素质,提升自己的审美品位和艺术品位,让学生在全面开展的劳动技术教学实践中,全面提升自身的各项能力,促进学生综合素质的全面发展。  相似文献   

试论农业信息资源网络化建设与开发   总被引：15，自引：0，他引：15  

伍玲 《情报科学》2004,22(2):162-164,167

本文论述了农业信息资源网络化建设的必要性，分析了当前我国在农业信息资源网络化建设中存在的主要问题，提出了加强农业信息资源网络化建设的措施，并就推进网络化信息开发与服务提出了建议。  相似文献   

关于WTO和图书馆的几点思考     

孙世华 《情报科学》2002,20(7):692-693

本文通过对“国际国联关系WTO对图书馆影响声明“的分析认为,外国图书馆可能进入我国,商业机制将引入图书馆,国外图书馆法将修订。指出我们必须在信息资源建设,网络和通信设施建设以及人才培养方面做好准备。  相似文献