With the development of computer technology, literature information retrieval has entered the computerized stage from manual retrieval, and it is developing in the direction of information processing automation, retrieval culture, intelligence and networking, and its retrieval content, application field and promotion scope are also expanding rapidly. Due to the diversity of users' information needs, information retrieval technology is constantly developing and changing, which leads to various types of information retrieval. According to the retrieval object, it can be divided into data retrieval, fact retrieval and literature retrieval; According to retrieval methods, it can be divided into manual information retrieval and computer information retrieval; According to the retrieval requirements, it is divided into strong correlation retrieval and weak correlation retrieval; According to the nature of retrieval, it can be divided into fixed-topic retrieval and retrospective retrieval; According to the information form of retrieval, it can be divided into text retrieval and multimedia retrieval.
Question 2: Characteristics of China periodical full-text database ● High integration of massive data, integration of title, abstract and full-text literature information to achieve one-stop access); To the literature information; ● Organize knowledge content with reference to the knowledge classification system prevailing at home and abroad, and the database has the function of knowledge classification navigation; There are many retrieval portals including full-text retrieval. Users can conduct primary retrieval through one portal, or they can conduct advanced retrieval by using flexible organization retrieval problems such as Boolean operators. ● It has the function of citation connection, which can be used for measurement and evaluation of individuals, institutions, papers, journals and other aspects in addition to building relevant knowledge networks; Full-text information is completely digitized, and the original layout structure and style of journal papers can be displayed and printed without distortion through the most advanced browser downloaded for free. ● Every paper in the database is explicitly authorized for electronic publishing; ● Diversified product forms and timely data updates can meet the personalized information needs of users of different types, industries and scales; ● Database exchange service centers all over the country and overseas, perennial user training and efficient technical support.
Question 3: "Which databases can retrieve the full text of Chinese periodicals?" HowNet or VIP periodical resource integration service platform, try it!
Question 4: What databases are there and what types are they? For example, China periodical network CNKII is a full-text database. Superstar digital library: the world's largest online database of Chinese e-books, digital library for scholars, founder and reading show.
China HowNet-Full-text Database of China Academic Journals
Wanfang-digital periodical full-text database
Full-text database of China sci-tech periodicals
Famous foreign language abstracts database: ISI three citation databases
SCI、SSCI、AHCI
Citation database of chicken ISTP conference
CPCI-S, CPCI- Song Seung Heon
Engineering index database
Inspection science abstract
rascal
Foreign language full-text databases: EBSCOhost, Emerald, Springer
Question 5: What are the three major literature retrieval databases in the world? The three main literature retrieval databases are as follows:
1, SCI (SCIentific citation index): (sci) is a citation database founded and published by institute for scientific information (ISI) 196 1, covering comprehensive retrieval publications such as life science, clinical medicine, physical chemistry, agriculture, biology, veterinary medicine and engineering technology.
2.EI (EngineeringIndex): (EI), founded by EI), 1884, published by American Engineering Information Company, covers journals, conference papers, scientific and technological reports and other documents in various disciplines of engineering technology.
3.ISTP is one of the three world-famous scientific and technological literature retrieval systems. TechnicalProceedings (ISTP), also published by ISI, was founded in 1978, reporting the conference papers of the annual scientific and technological conferences held around the world.
Question 6: What is the website of China periodical full-text database? Someone searched online and said it was HowNet. Is this HowNet? China HowNet owns: online publishing database of academic journals in China, full-text database of doctoral dissertations in China and online publishing database of China Yearbook.
The "China Journal Full-text Database" you mentioned has nothing to do with HowNet. So if you want to verify the authenticity of a periodical, you should go to the websites of China Knowledge Network and the State Press and Publication Administration for verification.
If you need to publish, you can consider the Zhongzhou Journal Alliance. Many teachers in our school post here, which is honest ~
Question 7: What are the retrieval ways of China periodical full-text database? Give an example to illustrate how to apply it. There are 1 1 retrieval methods. (1), simple search; (2) standard retrieval; (3) advanced retrieval; (4) professional retrieval; (5) citation retrieval; (6) scholar search; (7), research fund retrieval; (8), sentence retrieval; (9), reference books and knowledge meta-search; (10), the source of literature publishing; (1 1), unified navigation.
For example, standard retrieval is used to retrieve documents with the theme of "transgenic plants". The first step is to limit the scientific field and accurately search the scope. Select basic science-biology and agricultural science and technology in the navigation on the left of the homepage of China Academic Network publishing database; Step 2, input retrieval control conditions and document content characteristics. Such as publication date, searching for documents containing transgenic plants in the document subject; The third step: grouping and sorting, and screening the required literature through retrieval. Click "Subject Category" in the grouping to get the group names grouped by subject category on the left side of the test results. Select groups to reach the corresponding categories of documents.
Question 8: What are the answers to the full-text database of foreign periodicals? VIP Information Network is the largest and most comprehensive portal of sci-tech periodical papers in China, which provides retrieval and full-text browsing of several databases such as China sci-tech periodical database. Resources cover more than 8,000 Chinese periodicals, more than 400 Chinese newspapers and some foreign periodicals, covering science, engineering, agriculture, medicine, literature, history and philosophy.
Question 9: What TMLC are included in the official CNKI database of China HowNet, which requires a full-text data comparison resource database as complete as possible, and CNKI's "China Academic Literature Online Publishing Database" just meets this requirement. Up to now, China HowNet has more than 24.8 million academic journals 10000. The number of periodicals issued and the complete rate of literature collection are over 99.9%, ranking first among similar products at home and abroad.
Published 720,000 excellent master's degree theses in 503 master's degree programs and 96,000 doctoral degree theses in 368 doctoral degree programs; 1.286 important conference papers 1.06 million; 5 15 More than 5 million important newspapers and periodicals; /kloc-7.87 million copies of 0/376 important yearbooks; More than 600 kinds of reference books, more than 2.2 million copies; More than 6 million academic citation index data; These publications update an average of 20,000 records every day; National standards, patents and springer databases have also been integrated into the online publishing platform of China HowNet. In addition, the publishing platform also integrated and published 1020 third-party database resources.
CNKI has obvious advantages in resource categories, including periodicals, dissertations, conference papers, newspapers, yearbooks, reference books, patents, foreign literature, academic literature citations and other major resources related to scientific research and learning. Judging from the number of resources collected, CNKI is obviously superior to similar products, and the collection period of each resource library is very long, and major resource libraries such as periodicals date back to the date of publication. In terms of the speed of resource updating, CNKI products have been updated daily except for foreign documents cooperated by third parties, and the number of updates in a single day is relatively large, which is the result of industrialization and standardized operation.
Question 10: China Journal Full-text Database 1 Related Answers. Q: Why is CJFD a complete full-text database? A: Literature databases are generally divided into bibliographic databases and full-text databases. In the process of historical development, some bibliographic databases have also begun to include full-text documents. When the amount of full-text collection reaches a certain proportion, the database belongs to the category of full-text database. In addition, although some databases contain full-text documents from the beginning, they use full-image format. None of these databases can be called full-text databases in the full sense. Full-text database in a complete sense refers to the source database that stores the full text of documents and can provide full-text retrieval, and CJFD is such a database. 2. Q: How is the periodical collection scope of CJFD determined? A: A good literature database must carefully select the contents according to the positioning of database construction, which is the basis for ensuring the quality of the database. According to the figures released by the Press and Publication Administration, there are more than 9,000 periodicals published in China, of which about 6,000 are academic, knowledgeable and of good editing and publishing quality. The orientation of CJFD is mainly for academic exchange and knowledge dissemination, focusing on the collection of core journals and important journals in various disciplines. Its collection is 6 100 species, which may be adjusted with the development of China's publishing industry in the future, but it is basically stable at this scale. 3. Q: Does the scope of the database affect the recall and precision of literature information retrieval? Answer: The coverage of database measures the coverage of information collection, while the recall and precision measure the retrieval effect of information retrieval system. There is no correlation between them. For an information retrieval system, there is a mutual relationship between recall and precision. Information retrieval systems at home and abroad can achieve 60-70% recall and 40-50% precision. It should be pointed out that with the advent of the era of knowledge economy, the global knowledge output has increased substantially year by year. Therefore, information users not only care about the recall and precision of information retrieval, but also care that the retrieved literature information should belong to the high-level and high-quality literature in this field. Many users suggested that CJFD increase the function of restricting the retrieval of core journals, and we will seriously consider this suggestion. 4. Q: How does CJFD control the data quality of the database? A: First of all, since 1996, we have spent nearly two years organizing experts to study and formulate the Data Specification for Retrieval and Evaluation of China Academic Journals (CD-ROM Edition), which was reviewed and approved by the Press and Publication Administration at an expert review meeting and issued as an official document to the editorial departments of various journals, thus improving the standardization and normalization of CJFD source data from the source. Secondly, we have a review team, which is responsible for reviewing the received journal articles (mainly social science articles) to ensure the quality of the database content. Thirdly, the processing personnel use advanced software to digitize the articles to ensure the minimum error in the digitization. Then the articles are indexed and classified by professionals, and standardized control is implemented. Finally, we have the final audit procedure and the monitoring procedure after the data is online. These measures effectively ensure the data quality of CJFD. 5. Q: How does CJFD solve the copyright problem? A: Clear copyright is not only the premise of database construction, but also the touchstone to distinguish the authenticity of database products. CJFD is a successful example to solve the copyright problem of electronic publications, which has attracted wide attention from academic and publishing circles at home and abroad. All the documents included in CNKI database, including CJFD, are authorized by the periodical editorial department, literature authors and other publishing units according to law. The legal documents, such as China Academic Journals (CD-ROM Edition) Access Agreement and China Journals Network Access Agreement, which we signed with the periodical publishing unit, have been repeatedly discussed at the National Journals Conference, repeatedly demonstrated by legal experts and strictly examined by relevant leaders of the National Copyright Administration. However, the publishing unit of the journal has obtained the author's consent by signing a contract with the author, making an offer and making an announcement. , signed nearly 20,000 copyright agreements (items), paid royalties of nearly 24 million yuan, established legal rules in line with the Copyright Law of People's Republic of China (PRC) and universal copyright convention, and standardized the rights and interests of periodical publishers, article authors and database developers. These practices have played a positive role in promoting the development and prosperity of China's information resources. 6. Q: Can CJFD search by category? A: Of course. Due to the knowledge classification of China periodical full-text database ... & gt