文献检索英文课件

1、InformationRetrieval,George 2015-10-29,The reason to choose topic,Information Retrieval,Databases,Library & Info Science,Machine Learning Pattern Recognition Data Mining,Natural Language Processing,Applications Web, Bioinformatics,Statistics Optimization,Software engineering Computer systems,Models,

2、Algorithms,Applications,Systems,Computer Vision,Information retrieval is important!,Best search leads to best research,Outline,Identify your question(need) Where to find data Refinery,Section 1: Identify your question,Structuring our research question,An animal Four legs Round head Catch rat Like fi

3、sh Active at night,How to determine the question？,Encyclopedia, Books, Relevant research,Section II: Where to find data,Search engine,Academic database,Free,Popularity,Easy,Profession,Targeted,Charge,No results you want?,User Information Need,Documents,Document Representation,Query Representation,Ho

4、w to match?,Uncertain guess of whether document has relevant content,Understanding of user need is uncertain,Coverage (Recall),Accuracy (Precision),String Word Phrase Concept,The machine is not as smart as you,AND OR NOT,Section III: Refinery,Too many？,Last but not least,Example：practice by yourself

5、,Summary,References: 1. Lu Z, Kim W, Wilbur W J. Evaluation of query expansion using MeSH in PubMedJ. Information retrieval, 2009, 12(1): 69-80. 2. Skaik Y. Medical literature review: Search or perishJ. Pakistan journal of medical sciences, 2013, 29(2): 680.,Source: Material from google,Further lear