Study Of Key Technologies Of Agricultural Knowledge Management Based On Ontology

To promote information management to knowledge management is a certain trend of the development of informatization, and it's also an urgent need for improving the quality of information service. To develop the research of agricultural knowledge management technologies will support and provide the efficient and scientific means for agricultural knowledge management. The concept of Ontology was originated from philosophy, and then it has been used in the field of information technology for knowledge organization and management in recent years. The definition of Ontology is:"An ontology is a specification of a conceptualization". The agricultural knowledge management based on the theories, technologies and methods of Ontology attracted widespread attention at home and abroad, and became the front and hotspot of academic research.The purpose of the research is to design the complete agricultural knowledge management solution based on agricultural Ontology and study the other relevant key technologies. The emphases of the research is about the key technologies of agricultural knowledge organization, agricultural knowledge search and agricultural knowledge evaluation, and other key technologies were studied, The method adopted in the solution design stage of the study is to obtain and collect the different users' different requirements about agricultural knowledge management through user investigation. And in the key technologies study stage, the whole thinking of the solution of every section based on main technologies and the thought of Ontology was put forward. And the technologies of several key sections were implemented.The acquisition, organization, searches, express of agricultural knowledge based on the whole solution were studied. Additionally, knowledge service and knowledge grid were also studied. In agricultural knowledge acquisition section, the patterns and methods of the network information acquisition, agricultural knowledge acquisition based on RSS were studied, the core function based on RSS knowledge acquisition was implemented in VB.NET language, the agricultural knowledge acquisition based on Ontology and semantic web was also discussed. In agricultural knowledge organization section, the patterns and methods of knowledge organization with metadata, taxonomy and Ontology were studied, respectively. The knowledge organization based on metadata was implemented, the core agricultural scientific and technical information metadata (ASTICM) standard and its application profile were constituted, and a registration information management system based on ASTICM was developed. In agricultural knowledge retrieval section, the common pattern of knowledge retrieval and also the retrieval based on Ontology were studied, an intellective agricultural literature knowledge organization and search platform was developed, an intellective pig disease diagnose system based on Ontology was developed to demonstrate the inference based on Ontology. In agricultural knowledge evaluation section, the statistical method was used to establish the evaluation models for both knowledge retrieval and knowledge evaluation. A dynamic indices management system was developed to calculate and output the results. In the field of knowledge service and knowledge grid, the differences between knowledge service and information service was compared, and the patterns and models of knowledge services were studied, an agricultural grid architecture based on SOA and Ontology was put forward.The thought and a solution based on Ontology were put forward in this research. The research covered the studies on the key technologies in every section of agricultural knowledge management, implemented the agricultural knowledge organization with metadata and ontologies, the knowledge retrieval and inference based on ontologies, and the knowledge evaluation with statistical methods independently. Also, the key technologies of other section were studied. Because the core of Ontology is to put forward the theories, technologies and methods of knowledge organization and management, the technologies involved in the research are all the latest technologies in the world, so the research is advanced and novelty. The entire research will promote the depth and wide application of the study of agricultural Ontology in China, and converge with the relevant international research.