(1) topic retrieval
Subject retrieval is the retrieval of the subject field indexed by China HowNet, which contains all the subject features of an article. At the same time, tools such as professional dictionary, thesaurus, Chinese-English bilingual dictionary and stop thesaurus are embedded in the retrieval process, and low-relevance or micro-relevance documents are truncated by keyword truncation algorithm.
(2) Retrieve articles.
The retrieval of articles refers to the retrieval within the scope of article titles, keywords and abstracts. See article title retrieval, keyword retrieval and abstract retrieval for details.
Brief introduction of hownet
The concept of HowNet is National Knowledge Infrastructure (NKI), which was put forward by the World Bank in 1998. CNKI project is an information construction project aimed at realizing the dissemination, enjoyment and value-added utilization of knowledge resources in the whole society. Initiated by Tsinghua University and Tsinghua Tongfang, it was established in June 1999.
With the strong support of the Ministry of Education, the Publicity Department of the Communist Party of China, the Ministry of Science and Technology, the General Administration of Press and Publication, the National Copyright Administration and the National Development and Reform Commission, with the close cooperation of academia, education, publishing and library and information circles, and under the direct leadership of Tsinghua University,
After years of efforts, CNKI Engineering Group has built the "CNKI Digital Library" with the largest full-text information in the world by adopting self-developed and internationally advanced digital library technology.
And officially started the construction of "China Knowledge Resource Bank" and CNKI grid resource sharing platform, and provided the richest knowledge information resources and the most effective knowledge dissemination and digital learning platform for the efficient sharing of knowledge resources in the whole society through industrial operation.
Specific objectives of China HowNet project:
First, integrate knowledge and information resources on a large scale to improve the comprehensive and value-added utilization value of resources as a whole.
The second is to build a service platform for Internet diffusion and value-added knowledge resources, and provide information conditions for resource sharing, digital learning and knowledge innovation for the whole society.
The third is to build a platform for the in-depth development and utilization of knowledge resources and provide information means for knowledge management and knowledge service for all sectors of society.
The fourth is to create a market environment and commercial mechanism for the production and publishing departments of knowledge resources to publish and distribute on the Internet, and vigorously promote the modernization and leap-forward development of cultural publishing and industry.
With high-quality content resources, leading technology and professional services, China HowNet enjoys a high reputation in the industry. In 2007, China HowNet China Academic Journal Online Publishing Database won the first "China Publishing Government Award", and the full-text database of China's doctoral dissertations and the online publishing database of China Yearbook were nominated. This is the highest award in China's publishing field.
China Academic Literature Online Publishing Database, a major national 11th Five-Year Plan project, passed the appraisal and acceptance organized by the General Administration of Press and Publication in 2006.