科技文献检索清华大学IEEEIEEElectronicLibraryIEL全文数据库IEEE讲课稿.ppt

单击以编辑母版标题样式,单击以编辑母版文本样式,第二级,第三级,第四级,第五级,*,科技文献检索清华大学IEEEIEEElectronicLibraryIEL全文数据库IEEE,检索环境,采用IP地址限定用户范围，不需要帐号和口令。,校园网的用户均可通过连接INTERNET访问美国IEL主页,电话拨号连接校园网的用户，可以拨打999联通IEL,由于IEL目前不提供镜像和专线访问的技术方案,读者通过INTERNET访问该库的国际流量费用需用户自己负担。,使用说明,并发用户数限制在15个,出现“All product licenses are in use.Please try later.”的信息,检索完毕尽快退出，以便他人能够联通,检索方式,Search,Advanced Search,Advanced Search,支持字段检索和逻辑算符,View Field Names浏览字段符,View Search Operators浏览逻辑算符,限定在某一字段中检索，格式为：检索词字段名,例如：检索Smith J.的文章，,检索式为：Smith J.au,著者检索途径说明,著者检索一般是姓在前，名在后；但对于中国人来说可能不符。,如王国平wang guoping,检索式为：guoping wang au,保险的方法：按数据库的记录形式检索,运算顺序,(inference mechanisms Delgado M.)Vila M.A.,IEL常用的检索字段及标识符,Abstract ab,Article Title ti,Author au,Catalog Number ca,Affiliation cs,Conference Title ct,Meeting Date cy,IEL常用的检索字段及标识符,Subject Term de,ISSN，ISBN in,Issue Number is,Journal Name jn,Title(Article)ti,Volume vo,检索算符,逻辑算符：、,位置算符,Accrue ,Specific Field,Phrase ,位置算符Sentence,在同一句子中查找,echo ISDN,(analog,digital,convert),位置算符,Paragraph ,Near,Word,Stem,Thesaurus,例子,ceramic ti,(fiber optic network)ti,(ceramic,porcelain)(ti,de),smith au wave ti,ceramic de 1 isnew,isnew-查找最近30天的加入数据库的新记录,位置算符,限定检索词出现的顺序,(echo cancel),(cold fusion),(cold fusion),(output input)ti,Use with a proximity operator to match search terms only if they appear in the specified order.(By default,proximity operators(except)match search terms regardless of their order.)tends to narrow a search because it places an additional condition on records.,Syntax,proximityexpression,where proximityexpression is a search expression based on a valid proximity operator.,Notes,You can use with the proximity operators,and.It has no effect with the operator because order is assumed with.,Examples,(cold fusion),Matches any record containing a variation of the word cold followed by a variation of the word fusion in the same sentence;does not match any record in which fusion comes first.,(cold fusion),Matches any record containing a variation of the word cold followed by a variation of the word fusion within 10 words of each other.,(output input)ti,Matches any record containing the word output followed within 3 words by the word input in the title field.(You can use an clause as an argument to,but you cannot use as an argument to.,Proximity Operators,With proximity operators you can find search terms that appear within a particular field or that appear near one another within a record(increasing the chances that they are related).,Proximity operators include:,For matching terms in a specific field.,For matching terms in the same paragraph.,For matching terms in the same sentence.,For matching terms in the same phrase.,For matching terms within a specified number of words of each other.,phrase Operator,Use the operator to search for records in which two or more search terms must appear within the same phrase(any phrase within any field).,Syntax,searchterm1 searchterm2?searchtermN,or,(searchterm1,searchterm2,?searchtermN),where each searchterm is any valid search text.,Notes,A phrase is text delimited by a period or a comma.If the search text appears within a sentence containing no comma,works the same as.If the search text appears within a sentence that does contain a comma,the search terms must appear on the same side of the comma.,By default,matches search terms only if they appear within the phrase in the specified order(unlike and).Using with has no effect.,Examples,cache algorithm,Matches any record containing variations of cache and algorithm within the same phrase and in the same order,anywhere within the record.,(processor,silicon)(silicon,processor),Matches any record containing variations of processor and silicon within the same phrase,regardless of the order,anywhere within the record.The first matches the two terms in one order,and the second matches them in the other order.,此课件下载可自行编辑修改，仅供参考！感谢您的支持，我们努力做得更好！谢谢,