Study On Knowledge Sharing And Reuse Of Science Research And Development Domain

With the development of knowledge economy, a new management mode---knowledge management appears and attracts people's attention. Innovation is the aim of knowledge management,and knowledge sharing and reuse is the important precondition and guarantee of innovation. The knowledge management of science research and development domain which is the bearing and spreading field of new knowledge and technology has important theory value and realistic significance. This thesis focuses on the knowledge sharing and reuse of science research and development domain. A knowledge management framework is constructed, and many crucial technologies such as the building of domain ontology, the model, query and dynamic management of knowledge base, and the knowledge sharing and reuse based on knowledge scenario are researched systematically.1. As the form and expression of science research and development knowledge varies, it causes the difficulty of knowledge sharing, reuse and mutual operation. Ontology is adopted to model the science research and development knowledge. Unified concepts of the domain knowledge are provided, and mutual approved vocabularies and relations among them are confirmed, so people can get mutual apprehension of domain knowledge. As all kinds of knowledge expression methods are analyzed and compared, the description language and establishment process of the science research and development domain ontologies are studied systematically, and an example of ontology is provided.2. The knowledge base of science research and development domain is constructed on the basis of ontology system. XQuery is selected as the query language of the XML knowledge base. XQuery can establish original XML view of relational database, and users can define their own XML view on the original view to get higher level abstract. With the changes of knowledge and circumstances, the knowledge base is updated.3. Knowledge innovation has become the lifeline of knowledge economy, and knowledge sharing and reuse is the necessary condition of new knowledge and important premise of innovation. Knowledge scenario is the concrete background and circumstance of knowledge production and application. Only in the same or similar scenario is knowledge reuse significant. The model of knowledge scenario and the calculation method of knowledge scenario similarity are proposed. The process of knowledge scenario similarity calculating is elaborated, and the historial scenario which is similar to the problem scenario is attained through scenario similarity. The similarity vector is introduced to analyse the difference of scenarios. An idea of knowledge integration on the basis of knowledge scenario analysis is brought out to provide direction and channel of knowledge innovation. The relative knowledge is obtained through knowledge scenario similarity matching, so the possibility of knowledge reuse is higher. The semantic information is considered during the scenario matching process to improve the knowledge search accuracy.4. Aiming at the common problems of the present knowledge management model framework, a system of science research and development knowledge management is established, and the structure framework and function modules are introduced specifically. According to the distinguishing feature of automobile concept design field, a mold assistant system of automobile concept design is actualized primarily to assist designers'concept design.