1.6.9Web of Knowledge 5平台新功能教材.pptVIP

如何登录Web of Knowledge 5?  下载课件和录音视频/2011online/ 新浪微群进行提问交流：WoK在线大讲堂/569008 SCI大讲堂培训视频浏览下载 /search_video/q_SCI%E5%A4%A7%E8%AE%B2%E5%A0%82 更多培训资料……/productraining/WOS/ * This search demonstrates the use of the NEAR operator as well as truncation. First, I’ve selected the Topic field from the dropdown menu on the right. Topic searches article titles, abstracts and keywords. I’ve entered the term osmium and specified that I want it to appear within five words of the root term hydroxy. I’ve included the asterisk truncation symbol both before and after hydroxy. * Nearly 500 results are returned that match my search statement. Examining the results I see that I found articles that contain the word osmium near terms like Dihydroxylation, dihydroxylated and aminohydroxylation. These variations were found because I used both left and right hand truncation. Another way to expand your search results is through the use of Lemmatization. ** When the feature is turned on the search engine will automatically look for variations of the terms I enter. Lemmatization looks for plural forms of nouns like mouse and mice, alternate verb tenses run, running, ran , degrees of comparison for adjectives like loud/louder/loudest and Bristish vs American spellings. Turn lemmatization off and use truncation symbols if you want to more closely control what is searched. To demonstrate lemmatization I’ve entered ** the phrase “best management practice” in the Topic field. * Because lemmatization automatically looked for alternate forms of my search terms, I find records that contain the plural form, ‘best management practices’ as well as this record ** that contains the term management and the variation, ‘good practice’. This feature utilizes a proprietary dictionary to determine which terms are lemmatized. You may want to experiment with the tool to see if lemmatization or the use of truncation returns the best result for the search you are performing. * There is no reco