浅谈如何上好艺术体操选修课

对普通高校艺术体操选修课教学从形体姿态的培养、教学成套动作的编排,音乐的选择及口令、手势的运用等,进行了分析探讨.     

幼儿乳酸阈值及无氧阈心率的初步研究

对33名幼儿乳酸阈及其心率值进行测定,结果显示:3～5岁幼儿AT时血乳酸水平显著低于成人及青少年;幼儿亚极量强度运动后乳酸峰值大多出现在负荷后1min,反映了幼儿机体代谢的特异性.此实验结果可为幼儿有关生理机能和能量代谢的研究提供参数,所测得的乳酸阈心率值将为幼儿健身、减肥、增高等运动处方中运动强度控制提供科学依据.     

Measuring Search Engine Quality

The effectiveness of twenty public search engines is evaluated using TREC-inspired methods and a set of 54 queries taken from real Web search logs. The World Wide Web is taken as the test collection and a combination of crawler and text retrieval system is evaluated. The engines are compared on a range of measures derivable from binary relevance judgments of the first seven live results returned. Statistical testing reveals a significant difference between engines and high intercorrelations between measures. Surprisingly, given the dynamic nature of the Web and the time elapsed, there is also a high correlation between results of this study and a previous study by Gordon and Pathak. For nearly all engines, there is a gradual decline in precision at increasing cutoff after some initial fluctuation. Performance of the engines as a group is found to be inferior to the group of participants in the TREC-8 Large Web task, although the best engines approach the median of those systems. Shortcomings of current Web search evaluation methodology are identified and recommendations are made for future improvements. In particular, the present study and its predecessors deal with queries which are assumed to derive from a need to find a selection of documents relevant to a topic. By contrast, real Web search reflects a range of other information need types which require different judging and different measures.     

Medical history for tomorrow—preserving the record of today

This paper addresses the need to recognize the importance, and the challenges, of preserving the hugely expanding record of medicine today for historians of the future. We are faced not only with an increase in traditional publishing formats, but also with the rapid growth in electronic communications. Two celebrated medical cases, one from the late seventeenth century and one from the late twentieth, are used to illustrate the differences and the difficulties. The need for active and effective professional collaboration is stressed; libraries should work together to address these issues.     

论超文本技术在分类法编制中的应用

超文本是检索语言编制和维护理想的技术支持手段。使用超文本技术 ,可以改进分类体系中主题之间多维关系的揭示、从多个角度组织信息资源、进行轮排、设置镜像类目、动态组织分类体系以及联结不同的检索系统、联结说明与规则系统等。同时 ,应注意从超文本结构的角度重新审视原有的关于知识组织的理论、方法 ;探讨新技术方法的使用特点和规律 ;研究分类结构中整体控制问题     

论高校体育教学中学生创新思维能力的培养

通过树立现代体育教学观念、优化体育课堂教学、优选体育教学法等几个方面论述了学生创新思维能力的培养。     

浅析足球运动员意志品质及培养方法

阐述了足球运动中意志品质的作用和地位、培养足球运动员意志品质的意义及各种方法.     

数字图书馆数据库开发和使用中的版权问题

数据库的开发和利用是数字图书馆建设与读者服务的重要内容和基础。本文在总结数据库版权保护现状的基础上 ,对数字图书馆数据库的开发、数据库的保护期以及合理使用等问题作了重点阐述