Problem description:
This is an assignment for the literature retrieval course. We don't have any textbooks.
Analysis:
There are three ways to find the document:
1 direct method
Direct method refers to the method of directly using retrieval tools (systems) to retrieve document information, which is the most commonly used method in document retrieval. It is also divided into sequential investigation, reverse investigation and spot check.
(1) sequential search method
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, to know the initial age of a subject, we need to know the whole process of its development now, so we can use the sequential search method to start from the initial age and gradually find it in the near future.
(2) Backward search method
Reverse search method is a kind of literature retrieval method which uses retrieval tools from near to far, from new to old, and relative to time. This law focuses on recent literature. Using this method, you can get the latest information as soon as possible.
(3) Sampling 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.
2. Traceability method
Tracing method refers to the simplest method to expand the information sources one by one by using the references listed at the end of the mastered documents without using general retrieval tools. You can also trace the "citation" from the found "citation", and get more and more content-related documents according to the citation relationship between documents like a snowball.
3. Integrated approach
Comprehensive method, also known as circulation method, is a comprehensive application of the above two methods. The comprehensive method should not only use retrieval tools for routine retrieval, but also use the references attached to the literature for retrospective retrieval, and use these two methods alternately in stages and chapters. That is to say, first, several documents are detected by the retrieval tool (system), and then the reference directories at the end of these documents are used as clues to search, and so on until the requirements are met.
Comprehensive method has the advantages of both common law and retrospective method, which can find more comprehensive and accurate documents and is a more widely used method in practice. For the literature retrieval in novelty retrieval, we can comprehensively use the above retrieval methods according to the nature and retrieval requirements of novelty retrieval items and handle them flexibly.