Research On The Mechanism For The Agricultural Knowledge Service Based On Ontology

The agricultural knowledge service(AKS) is a certain trend of the development of agricultural informatization, und it is also an urgent need for improving the quality of the agricultural information service. AKS represents all of the activities and processes, in which service providers together with the users and agriculture experts carry out knowledge interaction, knowledge sharing and knowledge services under a certain information environment by using technologies in a certain way. The purpose of the research on the mechanism for agricultural knowledge services is to merge agricultural knowledge and services effectively, to combine closely agricultural knowledge, AKS, the technologies and methods under some information surroundings, so as to realize AKS.An ontology is a specification of a conceptualization, and it is very important for knowledge expressing and organizing. So, the technology of ontology is adopted in this thesis to describe and organize agricultural knowledge. Then, a sharing model of agricultural knowledge based on ontology is put forward, at the same time the technologies of programming and database are combined to design a platform for AKS, so as to implement knowledge communication, sharing and interactive knowledge services. The following subjects are mainly studied and emphasized.1) The principles, basic flow, model, and approaches in constructing an agricultural ontology are put forward.2) After describing and analyzing the typical types, processes, forms and features of agricultural knowledge sharing, an agricultural knowledge sharing model based on ontology is put forward.3) Beginning with the necessity and some hindering factors of sharing agricultural knowledge, the corresponding measures for it are put forward. After that, the incentive mechanism is discussed.4) Toward the whole AKS system, an interactive model of AKS and three patterns fitting for AKS are brought forward.5) Combining the technologies of ontology, database and programming, a platform for AKS is designed. Through the platform, many functions are guaranteed, such as agricultural knowledge referring and advising, personalized knowledge and information pushing, self-service of knowledge and concepts, and so forth.The studies in this thesis cover IT and some domain knowledge in agriculture, management, etc. The achievements are promising with a certain theoretical and applied value.