The popularity of the WWW has made people disseminate information very easy. The rele-vance of database concepts to the problems of managing and querying Web information has led to a sig-nificant body of recent resear...The popularity of the WWW has made people disseminate information very easy. The rele-vance of database concepts to the problems of managing and querying Web information has led to a sig-nificant body of recent research addressing these problems. In this paper ,we discuss some Web databasetechniques in brief ,and give some advises about future working.展开更多
该文介绍了化学化工等相关学科领域内常用的四个经典而重要的网络数据事实型数据库:Web of Science的化学子库、SciFinder、Reaxys、SpringerMaterials。分别对它们进行了数据来源、历史发展、收录范围等方面的简要介绍,并结合相同的检...该文介绍了化学化工等相关学科领域内常用的四个经典而重要的网络数据事实型数据库:Web of Science的化学子库、SciFinder、Reaxys、SpringerMaterials。分别对它们进行了数据来源、历史发展、收录范围等方面的简要介绍,并结合相同的检索实例:有机物蒽和无机物硫酸,使用了化合物分子式检索、化学结构检索等具有化学特点的检索方式,比较和分析了这4个数据库在检索途径以及所提供实验数据事实的数量、质量、种类等方面的共性和各自特点,并对该类型数据库的发展趋势作出归纳和预测。指出研究者应根据实际的实验需求,选取适宜的1个或多个数据库进行实验数据的查检和选用。展开更多
文摘The popularity of the WWW has made people disseminate information very easy. The rele-vance of database concepts to the problems of managing and querying Web information has led to a sig-nificant body of recent research addressing these problems. In this paper ,we discuss some Web databasetechniques in brief ,and give some advises about future working.
文摘该文介绍了化学化工等相关学科领域内常用的四个经典而重要的网络数据事实型数据库:Web of Science的化学子库、SciFinder、Reaxys、SpringerMaterials。分别对它们进行了数据来源、历史发展、收录范围等方面的简要介绍,并结合相同的检索实例:有机物蒽和无机物硫酸,使用了化合物分子式检索、化学结构检索等具有化学特点的检索方式,比较和分析了这4个数据库在检索途径以及所提供实验数据事实的数量、质量、种类等方面的共性和各自特点,并对该类型数据库的发展趋势作出归纳和预测。指出研究者应根据实际的实验需求,选取适宜的1个或多个数据库进行实验数据的查检和选用。
