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主要的文献检索方法（Main literature retrieval methods）.doc

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主要的文献检索方法（Main literature retrieval methods）

主要的文献检索方法（Main literature retrieval methods） Main literature retrieval methods Release date: 2009-03-10 Author: 21cnci view times: 958 contact with author Keyword search: Document Retrieval (1) direct method Also known as common use, refers to the direct use of retrieval systems (tools) to retrieve literature information. It is divided into the method, check method and sampling method. (1) method Refers to the method according to the sequence of time, the literature information retrieval methods are by far and near the use of retrieval system. This method can collect systematic literature about a subject, and it is suitable for literature retrieval of larger subject. For example, starting in a known issue, now need to know the whole process of its development, you can use the method from the beginning of the first age, gradually to the recent search. (2) check method Check method is from the near to the distant, from old to new, inverse time sequence retrieval method using retrieval tools. The emphasis of this method is on recent literature. Using this method, the latest information can be obtained as quickly as possible. (3) spot check method The spot check method is a method of searching key information by selecting the relevant information about the project, selecting the most probable or the most time period of the project, and using the retrieval tools. (2) tracing method Refers to not use general retrieval systems, but the use of the literature behind the references listed, one by one to track the original (cited document), reference lists and then from the original after listed one by one to expand the literature information method, a chain to go on. It can achieve better retrieval results, such as snowball, according to the reference relation between documents. (3) cycle method Also called subsection method or synthesis method. It is divided into phases, alternating, direct and retrospective methods, with a view to complement each other and cooperate with ea