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1、 （1）一次文献 全文数据库/事实数据库/ 电子期刊/图书/报纸 （2）二次文献 参考数据库（ISI WEB OF SCIENCE） （3）混合型 搜索引擎（GOOGLE/WOLFRAM）/ 服务器（ARXIV）/论坛ISI and Arxiv typical way of finding literatureNew search engine new concept of searchingSocial way web 2.0 style http:/ISI Web of Knowledge 是一个基于 Web 的 集成平台，提供高质量的内容及用于访问、 分析和管理研究信息的工具。 ISI:
2、 Institute for Scientific Information *跨库检索 *我的 EndNote Web *我的引文跟踪 *我的期刊列表 *显示/管理标记结果列表 *全文链接只知道 大概范围知道作者, 年代,出版物,等布尔逻辑符号：布尔逻辑操作符几乎在所有的搜索引擎 中,都将布尔逻辑操作符作为最基本的语法规则。NOT、 AND、OR和括号。NOT：逻辑“非”,符号“!”来表示。包含NOT前的关键字排除NOT后的关 键字 AND：逻辑“与”,符号“&”表示。包含所有的关键字。 OR：逻辑“或”,符号“ ”来表示。检索出几个关键字中至少包含一个的 文档。 括号：作用和数字中的括号相似
3、,可用来使括在其中的操作符先起作用 。四种操作符可互相结合使用,但有一定的执行先后次序,其优先顺序依 次为:括号、NOT、AND、OR。通配符的使用：进行简单查找的时候,可在单 词的末尾加一个通配符来代替任意的字母组合 。通配符大多数为“*”号,如bio* 可以代表开头 字母为bio的任何单词。http:/arxiv.orga highly-automated electronic archive and distribution server for research articlesCovered areas include physics, mathematics, computer s
4、cience, nonlinear sciences, quantitative biology and statistics.An openly accessible, moderated repository1.Having the Archive and Paper NumberArchived submissions are each assigned a unique identifier of the form yymm.nnnn (or arch-ive/yymmnnn for older submissions). 2.Want to Search Via Web Interf
5、aceusing archive subject area, title, author, or keywords in the full abstracts.RSS -Really Simple Syndication or Rich Site Summary通常在时效性比较强的内容上 使用RSS订阅能更快速获取信 息，由网站提供RSS输出。New articles alert via web interface, RSS feeds, and by email. http:/ knowledge engine: it generates output by doing computatio
6、nsGoal: make all systematic knowledge immediately computable and accessible to everyone. Mathematics|Statistics & Data Analysis| Physics Chemistry |Materials | Earth Sciences | Life Sciences |Technological World |Computational Sciences | Web & Computer Systems |Units & Measures |Money & Finance |Dat
7、es & Times | Places & Geography |Socioeconomic Data | Words & Linguistics | Education FeaturesCreating togetherForm online communities based on common interestsMake connections automatically through tags We are not alone. We can turn to more people from different parts of the world for help or commu
8、nication.More resources Update in time Search through Tags or people WikipediaDiigoSlideshareHomepage: http:/en.wikipedia.org Web-based, free-content encyclopedia the largest and most popular general reference work on the Internet.written collaboratively by volunteers around the worldprovide links t
9、o guide users to related pages with additional information Homepage: http:/ Advantages:learn from others presentations find writers, find employees, find people with same interestfree to get valuable and direct introduction materialsYou can browse the content by category and go into your field.Or se
10、arch the keywords hereIts full name is “Digest of Internet Information, Groups and Other stuff”. Social bookmarkingHome Page: http:/ Add your interested website herea Social bookmarking website which allows signed-up users to bookmark and tag web-pages a powerful research tool and a knowledge- sharing communitybe listed as one of the top 10 research tools by CNET (Computer Network) in 2006Accumulate your research topic or interested subjects Find and connect with people having common interests
