运动与心钠素

在广泛查阅相关文献的基础上,对国内外有关运动和心钠素的研究成果作一概述.结果表明:运动可引起心钠素的合成和分泌发生改变,心钠素在运动心、肾与功能的适应性中起重要作用.     

科技期刊实用价值与审美价值的思考

用实例阐述科技期刊实现实用价值与审美价值的必要性,提出了科技期刊编辑如何提高和实现刊物实用价值与审美价值的措施.     

Primäre Glomerulonephritiden

Ohne Zusammenfassung     

The turning point in 1985. The history of appraisal and disposal of records in Iceland

The article sets off with a brief summary of the history of appraisal and disposal of records as processed at the National Archives of Iceland (NAI) since its establishment in 1882 to present times. Rules on appraisal and disposal of records introduced in 1900, 1911, and 1916 were ignored and all records were kept. Status quo remained until 1985 when a new National Archives Act was passed. The appraisal and disposal process adopted then is described and explained. It included the publication of instructions on records management as well as forms relating to records management. The influence of acts of law on the appraisal and disposal process is explained. Finally the experience with the arrangement of organised appraisal in Iceland is described.     

基于用户兴趣模型的智能信息检索系统技术与实现

PCSICE是一个面向Internet的智能信息检索系统。该系统采用分布式智能体技术、用户兴趣学习算法和基于使用的聚类算法 ,有效地解决了现有系统在交互方式、自适应用户兴趣等方面的不足 ,满足人们在信息浏览时的个性化要求。该系统普遍适用于Internet、远程教育等分布式系统中的信息检索