Question 2: What are the classifications of information retrieval? Information retrieval behavior can be divided into academic information retrieval, leisure information retrieval, practical information retrieval, decision information retrieval and mixed retrieval. Floating this website for your reference dlibki/...FD2004.
Question 3: What are the main types of commonly used information retrieval systems classified by content?
1, periodical information retrieval system
2. Book information retrieval system
3. Paper retrieval system
4. Patent information retrieval system
5. Standard information retrieval system
6. Conference paper retrieval system
etc
According to the comprehensive degree
1, integrated information retrieval system
2, professional information retrieval system
Depending on the degree of automation
1, manual retrieval system
2. Computer retrieval system
Divide by form
1, search engine
2. Database retrieval system
Question 4: What are the ways of information retrieval? Patent information retrieval can be divided into three categories:
(1) Subject retrieval, including patent technology information retrieval, novelty retrieval, patent retrieval, infringement retrieval, etc.
(2) Description retrieval, including name retrieval, legal status retrieval, patent retrieval of the same subject, etc.
(3) Comprehensive retrieval, including technical introduction, etc.
In scientific research projects, new product development and other work, through patent information retrieval, we can clearly understand the technical field of research and the development of patent technology within the scope of product development, and avoid infringement and repeated research and development. By learning from the existing patented technology, we can also inspire new ideas, improve the level of scientific research and the starting point of product development, shorten the development cycle and reduce investment.
In the process of introducing advanced technologies at home and abroad, exporting products and cooperating with overseas joint ventures, we can have a clear understanding of the contents of related patented technologies by searching relevant patent documents and avoid unnecessary losses caused by infringement.
The main ways of patent literature retrieval are: patent information network, Internet, science and technology information network, library and so on.
Question 5: What are the main types of commonly used information retrieval systems classified by content?
1, periodical information retrieval system
2. Book information retrieval system
3. Paper retrieval system
4. Patent information retrieval system
5. Standard information retrieval system
6. Conference paper retrieval system
etc
According to the comprehensive degree
1, integrated information retrieval system
2, professional information retrieval system
Depending on the degree of automation
1, hand-held retrieval system
2. Computer retrieval system
Divide by form
1, search engine
2. Database retrieval system
Question 6: What are the types of literature retrieval tools? At present, there are thousands of information retrieval languages in the world, and their types are different according to their classification methods. Here are two commonly used retrieval language division methods and their types. I. The meaning of retrieval tools A retrieval tool refers to a tool for reporting, storing and searching for literature clues. It is the object of a certain range of literature items with search marks, and it is a secondary literature. Generally speaking, a retrieval tool should meet the following five conditions: ① a clear collection scope; (2) Having complete and clear document characteristic marks; (3) Each document entry must contain multiple document characteristic marks with retrieval significance, and be marked with retrieval marks; ④ Each project is scientifically organized into an organic whole according to certain laws; ⑤ There is an index part, which provides various necessary retrieval ways. Second, the types of retrieval tools At present, there are many retrieval tools available to people. Different retrieval tools have their own characteristics and can meet different information retrieval needs. There are different classification methods of retrieval tools, which can be divided into manual retrieval tools and mechanical retrieval tools according to the different means of processing literature information. According to the different carrier forms, it can be divided into: book retrieval tools, tape retrieval tools, card retrieval tools, microfilm retrieval tools and film retrieval tools. According to the different description formats, retrieval tools can be divided into the following four types. 1. Directory Search Tool Directory Search Tool is a tool to record specific publishing units, collection units and other appearance features. It takes a complete publishing or collection unit as the recording unit, and generally records the name, author and source of the literature. There are many kinds of catalogues, among which national bibliography, joint catalogue and collection catalogue are particularly important for literature retrieval. 2. Title-based retrieval tool A title-based retrieval tool is a retrieval tool that describes the external characteristics of a document (such as document title, author name, document source, etc.). ) takes a single document as the basic description unit, and there is no content summary. It is a retrieval tool for quickly reporting document information. The main difference between it and a directory is that it describes different objects. The object of catalogue description is the unit publication, and the object of title description is a single document. 3. Abstract retrieval tool Abstract retrieval tool is a retrieval tool that abstracts a large number of scattered documents, selects important parts and arranges them in a concise way. According to the author of the abstract, it can be divided into author abstract and non-author abstract. Author's abstract refers to the abstract written by the original author; A non-author's abstract refers to an abstract written by a professional abstract author who is familiar with his major. According to the degree of detail, it can be divided into indicative summary and reporting summary. The indicative abstract shows the title, content scope, research purpose and source of the document in the shortest language, which is actually a supplementary explanation to the title, generally about 100 words; The purpose of the report summary is to reveal the theme essence of the original text, basically reflect the content of the original text, the scope and purpose of the discussion, the research means and methods adopted, the results or conclusions obtained, and also include relevant data and formulas. Generally about 500 words, important articles can reach as many as 1000 words. 4. Index retrieval tool An index retrieval tool is a retrieval tool that arranges related items or knowledge units in some important documents in a specific range, such as book titles, periodical titles, names of people, place names, words, etc. , according to a certain method, and indicate the source, to provide users with literature clues. There are various types of indexes. In retrieval tools, the commonly used index type is classified index; Subject index; Keyword index; Author index, etc.
Question 7: What are the common methods of information retrieval? What are the advantages and disadvantages of each? Classification (browsing) retrieval Classification (browsing) retrieval (browsing) generally collects relevant information according to a fixed category set by people, but when searching, you can get relevant information in depth only by progressing step by step according to the category. Generally speaking, they are organized and classified according to the theme or word order. Its advantage is simple and clear, and relevant information can be retrieved without any basic knowledge. Its disadvantages are that manual classification is not detailed enough and the release time of manual processing information is delayed. Keyword search Keyword search is generally divided into simple search/quick search, advanced search and expert search. Simple Search Simple Search generally provides a search word input box for inputting the search words that appear in the default fields. Some systems can also directly input the search formula of expert search, such as the search method of Google homepage. Advanced retrieval Advanced retrieval can generally have multiple input boxes, and you can choose the logical relationship between the retrieval fields and the input boxes. There can also be various restrictions. Expert retrieval Expert retrieval can be based on input retrieval. For users who have learned special retrieval skills, they need to understand various retrieval skills such as logical combination retrieval, word segmentation retrieval and field retrieval of the retrieval system.
Question 8: According to different information retrieval objects, what kinds can they be divided into? According to the nature of the retrieval object, there are three types of information retrieval, namely, literature information retrieval, data information retrieval and factual information retrieval.
Document retrieval (1) is an information retrieval with documents as the retrieval object, that is, to find out the documents containing the required information from a document. The results of literature retrieval provide literature clues or original texts related to users' information needs.
2) Data Retrieval is an information retrieval with specific data as the retrieval object and purpose. Including data charts, material composition, performance, atlas, market situation, physical and chemical characteristics of materials, model specifications of equipment, etc. This is a deterministic search.
3) Fact retrieval is an information retrieval that obtains new analysis results according to the actual situation of things. It takes the items extracted from the literature as the retrieval content, including the basic concept, basic situation, time and place, relevant facts and processes of things.
Question 9: What are the main ways of literature retrieval, including the following:
First, the author's way Many retrieval systems have an author index and an institution index, and patent literature retrieval systems have an 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.
Two, the title includes title, title, title and other ways. Some retrieval systems provide retrieval methods by title, such as title catalogue and periodical catalogue.
Thirdly, the classification method searches documents according to the subject classification system. This method is based on the knowledge system, so it can better reflect the subject system, reflect the subordinate, derivative and parallel relationship between subjects and things, facilitate us to find documents from the subject range, and play an analogy role. Classified retrieval mainly uses classified catalogue and classified index.
Fourthly, the subject method searches 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.
Verb (abbreviation of verb) refers to the reference or quotation attached to the document, which 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.
Six, serial number method Some documents have specific serial numbers, such as patent number, report number, contract number, standard number, international standard book number, serial number, etc. 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.
7. Codes compiled by using some codes of things, such as molecular formula index and ring index, can be retrieved from a specific code order.
Eight, special project method from the literature information contained or related terms, place names, names, organization names, trade names, biological generic names, years and other specific order to retrieve, can solve some special problems.