引文分析法（citation analysis）.docVIP

引文分析法（citation analysis） Citation analysis,.Txt people never know who inadvertently told you goodbye, then really gone. How long is a minute? It depends on whether you are squatting in the toilet or waiting outside the toilet citation analysis In addition to the content analysis presented in the previous two sections, the other two main areas involved in content correlation analysis are information retrieval and citation analysis. In this section, after a brief description and comparison of these two methods, the methods of citation correlation analysis, citation analysis and content analysis, are introduced. First, retrieval related Retrieval relevance refers to content correlation analysis for the purpose of information retrieval. It can be said that all kinds of information retrieval theories and methods focus on accurate, efficient display, identification and judgment of retrieval objects, content or conceptual relationship. For example, one of the most important and difficult problems in any programming language is how to display the relationships between concepts. If the real relation between the concepts can not be fully displayed or not shown, it will affect the function of checking, expanding and checking the retrieval language. From the viewpoint of correlation, can be understood as recall related content will cover you, understand the content related to precision real display degree. For example, in database retrieval, a dictionary of detailed display concepts or content related relationships is developed. This dictionary can help users to reveal relevant subject words, so as to improve the retrieval effect. A U.S. Department of energys energy database with about 1000 pages and 25 thousand tables of the dictionary, can show the relevant lexical entry instead of Related words or different levels, such as distillation in the dictionary of the following words of separation to broaden, narrow the word for dry and vacuum distillation, also shows that about 12