1, determine the information requirements. Determining information demand is the first step of information retrieval and the core of the whole information retrieval process. In this step, users need to clearly determine the type, subject, format, scope and so on of the information they need.

2. Determine the retrieval tool. According to the characteristics of information demand, choose the appropriate retrieval tools. Common retrieval tools include: library catalogue, network search engine, database, library classification number, index and so on.

3. Develop retrieval strategy. The purpose of formulating retrieval strategy is to improve retrieval efficiency and accuracy. Retrieval strategies usually include keyword selection, keyword combination mode, retrieval interface selection, retrieval condition setting and so on.

4. Perform retrieval. According to the formulated retrieval strategy, enter the retrieval interface for retrieval. When searching, we should pay attention to the correctness and rationality of search language and search words, as well as the setting of search conditions and search scope.

5. Read and filter the search results. After searching, a series of qualified literature lists will be obtained. You can browse the abstract or full text of the literature first and make a preliminary screening, and then read and analyze the screened literature in depth.

6. Get the information you need. After reading and screening the retrieval results, the required information can be obtained and used in related research, study or application.

Functions and steps of information retrieval methods

1. Accurate matching: These methods and steps can help to determine the search keywords and make accurate matching according to the keywords. This helps to improve the accuracy of search results and eliminate irrelevant information.

2. Search strategy: These methods and steps are helpful to determine the search strategy, such as selecting an appropriate search engine, database or online resources, and setting search parameters. Different search strategies can provide better search results for different information needs.

3. Information filtering: Methods and steps can help to screen and filter search results in order to find the most relevant and useful information. By setting filtering conditions or using sorting algorithm, search results can be more readable and understandable.