1, the way of writing

At present, many document retrieval channels include author index, patent document retrieval system includes patentee index and institution index, and the retrieval channels using the names of authors, authors, translators and patentees or the names of institutions and groups are collectively called author channels.

2. Classification method

Retrieval of scientific and technological literature by subject classification system. This method is based on the knowledge system as a reference for classification. Therefore, we can show the discipline system and reflect the subordinate, derivative and parallel relationship between disciplines and things, which is convenient for us to find documents from the scope of disciplines and play the role of "analogy"

3. Title mode

In the general classification system, search paths can be sorted according to the provided names. Such as titles and periodicals.

4. Citation channels

References or quotations attached to documents are one of the external characteristics of documents. The index system compiled by using this citation is called citation index system, which provides a method to retrieve cited papers from cited papers, called citation method.

Second, the methods of scientific and technological literature retrieval:

1, direct method

Also known as ordinary method, it refers to the method of directly using retrieval system (tool) to retrieve literature information. It is also divided into sequential investigation, reverse investigation and spot check.

2. Subsequent methods

Sequential retrieval method refers to the method of using retrieval system to retrieve literature information from far to near in time sequence. This method can collect systematic documents of a certain discipline and is suitable for document retrieval of larger disciplines. For example, if we know the initial age of a subject and need to know the whole process of its development, we can use the sequential search method to search from the initial age.

3. Spot check method

Spot check method refers to the characteristics of the project, selects the most likely or most likely time period of document information related to the project, and uses retrieval tools to carry out key retrieval.

4. Cycle method

Also called subsection method or synthesis method. It uses direct method and backtracking method alternately in stages to learn from each other's strong points and cooperate with each other to obtain better retrieval results.

Three, the steps of scientific and technological literature retrieval:

1, specify the purpose and requirements of the search.

2. Select the appropriate retrieval tool.

3. Determine the ways and methods of retrieval.

4, according to the known literature clues, query the original literature.

Baidu Encyclopedia: Literature Retrieval