Select the advanced search button on the right side of the search bar on the homepage of HowNet, and then there are two drop-down box options on the left side of the author and literature source, namely, and, or, no, and means and, or means or, and non means right or wrong. After the user selects and in the drop-down box, click Search, and there will be documents that meet the three retrieval information of subject, author and source at the same time.
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Author's way: Many retrieval systems have author index and institution index, and patent literature retrieval systems have patentee index. The method of searching from the names of authors, editors, translators and patentees or the names of institutions and groups by using these indexes is collectively called author method.
Classification method: Search the literature according to the subject classification system. This method is based on knowledge system. Therefore, it can better reflect the discipline system, reflect the affiliation, derivation and parallel relationship between disciplines and things, and facilitate us to find documents from the scope of disciplines and play the role of "analogy".
Subject method: search the literature through the subject words that reflect the content of the literature. Because the thematic method can reflect all aspects of a theme, it is convenient for readers to conduct a comprehensive and systematic thematic study on a certain problem, thing and object. We can find all aspects of the literature on the same subject through the subject catalogue or index.
Citation channel: The reference or quotation attached to the document is one of the external characteristics of the document. 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.
Serial number method: Some documents have specific serial numbers, such as patent number, report number, contract number, standard number, international standard book number and serial number. The file serial number is clear, short and unique, which is used to identify some files. Based on this, various serial number indexes can provide a way to retrieve literature information in the order of serial number itself.