Research On Theory And Technology Of Knowledge Grid Based Supply

With the support from the National Basic Research Program of China / 973 Project (Innovative product development oriented knowledge supply based on knowledge grid), this doctoral dissertation focus on the knowledge supply in the knowledge grid environment. It introduces knowledge grid, organization of knowledge resources, knowledge demand modeling, and knowledge supply engine. In addition, the proposed theory is implemented in the domain of product development, and its case study is also illustrated in this dissertation.The dissertation proposed structured & distributed three layer model based on peer to peer model, and the query routing algorithm. The knowledge space model, the core of knowledge grid, is also extended by employing the knowledge map toolkit. With the target of knowledge supply, the research of knowledge grid brought out the architecture of knowledge supply based on knowledge grid, the physical topology of knowledge grid, and the methodology for supporting the knowledge supply among inner or inter organizations.The dissertation proposed the knowledge service based uniform knowledge expression and encapsulation for heterogeneous knowledge resources. An original model of Hy-SN (hyper graph based semantic network) is proposed for describing the semantic relationships among knowledge services. The data structure and reasoning mechanism of Hy-SN are also proposed for managing knowledge resources efficiently.The dissertation proposed the workflow centric knowledge demand modeling and intelligent mining. It mainly consists of the static model of knowledge demand based on member-role-task reference model, and a set of content-based or collaborative filtering algorithms for mining users'knowledge demand automatically and intelligently, which is mainly according the users'interest, education background, knowledge query history, and communication records among communities.This dissertation proposed centralized and distributed knowledge supply engine model. As to the former sort (centralized), the users demand based knowledge supply model is brought out as routine application, and innovation oriented knowledge supply model for advanced application. Corresponding with the structured & distributed three layer knowledge grid model, a distributed knowledge supply engine model is also introduced in detail.The proposed theories are implemented in the domain of product development. The system architecture of knowledge supply platform is introduced in last chapter. By using the prototype system, some knowledge resources are managed and some cases for knowledge supply in the product development process are also illustrated. As to the advanced knowledge supply application, a case for innovative knowledge supply is described in detail. The case study for distributed knowledge supply engine is also mentioned in the last chapter.At last, some major contributions of this dissertation are summarized, and some advices for further research are proposed.