The earliest starting year of data collection in China hownet periodical full-text database is 1994.
China hownet periodical full-text database is the world's largest continuously and dynamically updated China periodical full-text database, with 8 million full-text documents and150,000 bibliographies, which are divided into nine photo albums and 126 special literature databases. Collection period: 1994 and 6 100, the data integrity of full-text journals reached 98%.
Brief introduction of China hownet periodical full-text database;
1. Knowledge source: 6 100 full-text core journals and professional journals published publicly in China.
2. Coverage: science and technology A, science and technology B, science and technology C, agriculture, medicine and health, literature, history and philosophy, economic politics and legal knowledge, education and social science, electronic technology and information science.
3. Product form: China periodical full-text database, China academic journal and China periodical full-text database. The theme full-text database of 1994-2000 has been published in a bound volume, and each theme database contains 1-2 DVD discs.
4. Update frequency: The websites of CNKI Center and Database Exchange Service Center are updated daily, and each mirror site can transmit data through the Internet or satellite to realize daily update, and the album CD is updated monthly and the special CD is updated annually.
Refer to the above? Baidu Encyclopedia-China HowNet Journal Full-text Database
What are the ways to retrieve the full-text database of China periodicals? Give an example to illustrate how to apply it.
There are the following ways: primary retrieval, advanced retrieval, clustering retrieval and secondary retrieval.
Take advanced search as an example to demonstrate.
Tools: computer.
1. On the left side of the homepage search bar, you can see a drop-down box, and on the right side, there is a link to "Advanced Search". Both places can be searched under limited conditions.
2. These options appear in the drop-down option box on the left, and you can choose the search scope as needed, such as searching the author's name and so on.
3. After entering advanced search, the options will be richer and more accurate, and the specific time period for publishing search documents can be limited.
4. After setting the parameters, click Search below to search.
5. After the search results, there are tabs such as professional retrieval and sentence retrieval.
The resource types of CNKI, the full-text database of China periodicals.
There are many types of literature resources in China HowNet, including periodicals, dissertations, conference papers, patent documents, newspapers, yearbooks and so on.
Any periodical included in CNKI China periodical full-text database is a periodical of CNKI China periodical full-text database. China periodical full-text database is one of the earliest China periodical full-text databases in China, which contains more than 7,000 periodicals and130,000 papers.
Source of knowledge: 5300 kinds of core journals and full-text journals with professional characteristics published publicly in China.
Coverage: science and technology A, science and technology B, science and technology C, agriculture, medicine and health, literature, history and philosophy, economy, politics and law, education and social science, electronic technology and information science.
Collection year: 1994. Up to now, the data integrity of more than 7,000 full-text journals has reached 98%.
Update frequency: the websites of CNKI center and database exchange service center are updated daily, and each mirror site can transmit data through the Internet or satellite to realize daily update, and the album CD is updated monthly and the special CD is updated annually.
Extended data:
China Knowledge Resources General Database provides CNKI source database, foreign language database, industrial database, agricultural database, medical database, economic database and educational database.
Among them, the comprehensive databases include China periodical full-text database, China doctoral thesis database, China excellent master thesis full-text database, China important newspapers full-text database and China important conference literary theory full-text database.
Each database provides three retrieval functions: primary retrieval, advanced retrieval and professional retrieval. Advanced retrieval function is the most commonly used.
References:
Baidu Encyclopedia-China HowNet
Characteristics of China periodical full-text database
● Massive data is highly integrated, integrating bibliography, abstracts and full-text literature information to realize one-stop literature information retrieval;
● 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.
There are several photo albums in the left column of China periodical full-text database of HowNet.
How many albums are included in China Journal Network 1 full-text database? The full-text thematic database of China Journal Network includes nine thematic collections, including Science and Technology A, Science and Technology B, Science and Technology C, Agriculture, Medicine and Health, Literature, History and Philosophy, Economics, Politics and Law, Education and Social Sciences, Electronic Technology and Information Science.
2 How many retrieval fields are there in the dedicated full-text database of China Journal Network? The retrieval method of China Journal Network includes 13 retrieval fields, namely, title field, author field, keyword field, subject field, institution field, Chinese publication name field, Chinese abstract field, citation field, fund field, full-text field, year field, number of issues field and ISSN field.
3 How many basic retrieval fields are there in the special full-text database of China Journal Network? In the 13 retrieval field, the article title, abstract, keywords, subject words and full-text fields belong to the basic fields, so you can find relevant documents from the perspective of subject.
4 How many retrieval methods are there in the full-text database of China Journal Network? * * * There are three retrieval methods. They are: 1) classified navigation. Using the photo album column and its classified navigation tree provided by the system to find relevant documents is suitable for the occasion of comprehensive investigation of documents in a certain subject. 2) Primary retrieval. Retrieves the specified field using the retrieval item. 3) Advanced retrieval. It refers to finding documents that meet these conditions and logical relationships at the same time by setting multiple search conditions and logical combinations.
5 What is the secondary retrieval of the special full-text database of China Journal Network? Can I only get it back twice? The second search is to search again within the scope of the previous search results, thus narrowing the search scope and making the search results gradually approach the requirements of this topic. Its function is equivalent to doing logical and operation between two searches. No matter whether it is the first-level retrieval interface or the advanced retrieval interface, as long as the number of retrieval results allows, the second-level retrieval can be repeated until the requirements of the subject are met.
6 What's the difference between the primary retrieval and the advanced retrieval of the special full-text database of China Journal Network? The difference lies in two aspects: 1) The number of retrieved fields is different. There is only one field in the primary search, so you can only retrieve the search words of one search field at a time. Advanced search has two fields, and search terms of two different search fields can be retrieved at the same time. 2) The retrieved Boolean logic operators are different. There is only one field in one retrieval, that is, the AND retrieval of the previous retrieval result by the second retrieval. In advanced retrieval, there are two fields that can be used. In addition to the AND retrieval of the previous retrieval results through secondary retrieval, you can also OR the retrieval words of two different retrieval fields at the same time.
7 What is the function of the full-text browser for the special full-text database of China Journal Network? CAJ full-text browser of China Journal Network is used to browse the full text of this database. The browser supporting full-text CAJ files in the full-text database of China Journal Network can be downloaded from the homepage of the database. If the browser is not pre-installed on your computer, you will not be able to read the full text of the database.