See Chapter 1, 3one of the basic principles of a literature search. The basic principles of literature search through the literature search is actually a search tool to find the information they need. The principle Simply put, the question is to identify and retrieve those stored in a retrieval system identification literature to compare two identification documents contain the same or need to retrieve the identification, put the logo features a literature retrieval system from in output, the literature is the literature search initially hit. This includes storage and retrieval of documents, as shown.Comparison and selectionStored procedure: the retrieval process ：Document Information Search topicAnalysis AnalysisDocument Information feature Information retrievalquestionsBibliographic indexing ExpressionCharacterizationExpressInfor matioCharacteriz ationExpressInformation collectionSearch Results(Perfectly matched, related, unrelated) 2．Information storage and retrieval 1)information storageretrieval booksAbstract number: 020001Title: the dye in production of the microcomputer control Author: zhang Ming; Chien-ming wang; LiuJianYeInstitution: Beijing institute of chemical (Beijing 100001) Literature sources (source) : chemical technology, 2002.33 (6) 32-36Abstract: in this paper the dye production process in the microcomputer control, temperature control technology of application.Key words: the dye production microcomputer feeding control temperature controlClassified number: TQ7 TP3Literature characteristics, search fields, retrieval item: the title, author, institutions, literature sources, abstract, key words, classificationdatabaseDN--02174618AN--ETI – IMPRIVING LIGHT – METAL CASTINGS.AU – Vaccari , John A.CS –American Machinist & Automated Manufacturing, New York, NY USASO – Am Mach Autom Manuf v 130 n 6 Jun 1986 p 87 –89PY -- 1986SN – 0886-0335LA -- ENGLISHDT -- JA^(Journal Article)TC -- A^(Applications)AB –With high –strength aluminum-and magnesium - casting alloys having reached the limit of their mechanical performance by conventional …. ^5 refs.DE -- ALUMINUM AND ALLOYS – CastingID --^FOUNDRY PRACTICE - Permanent MouldCC -- 541 (Aluminum & Alloys) ^534 (Foundry Practice)2) information retrievalA; Appearance characteristics1. The title (title, the title, literature title) indexIn the production of dyes microcomputer control-0200012. The authors indexZhang Ming-020001Chien-ming wang see: zhang MingLiuJianYe see: zhang MingFamily name * in former name last3. Institutions indexBeijing institute of chemical-0200014. Literature number (registration number, ISSN number,the patent number, the number of report)B; Content features1. The theme indexThe dye production--02001 02 * * * * * * * * * *Microcomputer-02001 02 * * * * * * * * * *Feeding control--02001 02 * * * * *Temperature control--02001 02 * * * * *2. Classification indexTQ7 chemical industry02001 02 * * * * *TP3 automatic control02001 02 *****Computer search:1. Field retrieval: title, key words, the full text,, authors, institutions, the title, s, WenZhong, etc2. Simple retrieval: field, classification, subject3. Advanced retrieval: retrieval modelExample: S1. Dyestuff production AND (computer ORcomputers OR computer) AND melky charging AND temperature AND controlS2. (zhang Ming OR chien-ming wang OR LiuJianYe) / AU AND Beijing institute of chemical/CSS3. S1 AND S2 Search topic: the application of computer in dyestuff production to retrieval?Literature characteristics, search fields, retrieval item: the title, author, institutions, literature sources, abstract, key words, classification3. Retrieval languageRetrieval language is in the field of literature retrieval people used to describe literature theme (content) characteristics or external characteristics and the questions of the information a special language. Because it is marking the language of literature characteristics, can also be called indexing language, because it is the index of language, can also be called as the index language.1) retrieval language in the literature retrieval in the roleIn the literature retrieval of the storage and retrieval process, retrieval language plays animportant role in language communication, is the literature guarantee storage and retrieval two process, indexing and retrieval personnel both sides thought personnel of the bridge. If no retrieval language as indexing and retrieval of staff personnel common language, it will be difficult to make indexing of literature of the contents of the personnel express (indexing terms) and retrieval personnel to the same content to express the literature (retrieval language) agree, literature retrieval it cannot.For example, the computer, the computer, the computerConcrete, concrete, cementSo retrieval language is essentially indexing and retrieval of the agreement between language. Use retrieval tools must master the retrieval ?Self-taught contentSecond, literature retrieval procedureLiterature retrieval we have the following five program (step) :Analysis and research topic selection retrieval tools-sure way to search for clues to the literature retrieval, and ask for the original documents.1. Analysis research subject analysis to find the literature research is the most basic preparation before, to the retrieval process and retrieval effect has the crucial influence function. It includes:1) analysis of the main content of the research project, which subject, etc, to determine the subject keywords, relevant keywords and specialized subject range (a secondary classification mesh name and related categories name) retrieval marking.2) according to the subject for property analysis found mainly in literature in what publications, so as to determine the types of literature retrieval.3) according to the subject1) books Example:Computer simulation of electronic circuits①R, Raghuram ②, NeW Delhi, India: Weiley③(1989)④246pp⑤,ISBN ：8122401112⑥Note: (1) the title; (2) the authors; (3) of publication, the publisher; (4) the publication date; The total number of pages;(5) 6 international standard book number < ISBN number >.2) journal Example:J Pressure Vessel Technol. Trans, ASME①V112 n.4②Nov. 1990③P410～416④Note: (1) the abbreviation; the title (2) the time; the roll(3) the monthly publication; (4) : page number.3) the meeting literature例：Proceedings Fourth AnnualSymposium on Logic in Computer Science ①(Cat. No. 89 CH2753-2)②Paific Grove, CA. USA, 5-8June 1989③(Washington, Dc, USA :IEEE Computer, Soc press 1989 P263-72)④Note: (1) the meeting and conference record the name; (2) the order number; (3) the meeting place and time; (4) the meeting record the publisher, address and publication date and the pagenumber.Usually, the Meeting in the literature have a Meeting in the characteristics, such as Proceedings, Symposium, Conference, Meeting, according to these features to determine whether theMeeting of the literature.4) the patent documentExample: Patent no: US 4202737Note: the Patent number is the United States code, US, the Patent document has "Patent" the network.5) technical reportExample: the Report KFKI-1983-57 (1), Hungarian Acad, Sci., Budapest (2), 1983 () (3) (4), 15 ppNote: (1) the technical report Numbers; (2) collect and compile technical report agencies address; (3) the time; announced (4)report pages. Technical Report has "Report" the network.6) degree thesisExample: j. a. George, (1) the "Computer Implementation of the Finite Element Method", (2) Ph. D. Dissertation (3), StanfordUniv俄文字母-拉丁字母音译对照表(1) in the YuWei can be omitted when.Four, Chinese retrieval tools (printed)1 situationChina science and technology literature retrievaltools to establish the system of experience, we have from scratch, from a translation from printing wrote, to the process of development of the database.The publication of the retrieval tools in China through decades of hard work, gradually layout automation, index WanShanHua, carrier to the direction of the diversification. In general, our country retrieval toolhas the following features:1) published in Chinese, domestic readers languagebarriers, without reading speed.2) system and structure step by step, standardization and normalization of the retrieval tools for the reader master the use method and sharing the document resourcesprovided convenience.3) morphological diversity. In recent years, more andmore domestic information processing orgnaizationcalculated by using the ?。