Research On The Construction Of Rural Intelligent Information Service System And Its Key Technologies

In the information age, lack of information resources in rural areas has become the bottleneck which inhibits the development of new socialist countryside in China, and it has become one of the determinants which widen the development gap between urban and rural areas. This situation shows the necessity of building an Rural Intelligent Information Service System (RIISS) to provide the rural users with comprehensive information services. Meanwhile, construction of RIISS is the needs of the information society development, the development strategy of China’s informationization and the rural grass-roots workers in China.This paper aims at building the Rural Intelligent Information Service System. For a start, this paper elaborates the basis of the thesis, the research summary at home and abroad, research contents and methods, significance and innovation and the basic structure of this paper. Moreover, the requirements and feasibility of RIISS are discussed based on the theories such as information science, information service and dissemination science. The service location and design principles are described, then, the architecture of RIISS is designed. Thirdly, researches are carried out on key technologies, for instance, the information retrieval, applications and implement-ations of multimedia, database construction and information recommendation of RIISS. In the end, the network operating environmentand server of RIISS is described. The Rural Intelligent Information Service System is realized and its application areas and methods of promotion are discussed. The main research works of this paper are as follows:First, the theoretical analysis and architecture design of RIISS. This part mainly expounds the theoretical basis, analyses of requirement and feasibility of RIISS. Meanwhile, this part narrates the system service location and design principles of RIISS, and conducts the architecture design, which includes its logic design, operating framework design, function design, detailed content design and so on.Second, study on implementation and application of multimedia. This part mainly elaborates the knowledge of multimedia technology, and designes the process of RIISS multimedia application module, discusses the display of information, interactive, and data storage technology of multimedia in RIISS. Third, study on construction of RIISS database. This part focuses on the objectives, principles and specifications of RIISS database construction. The logical structure, use-case model and various data tables of RIISS database are designed.Fourth, study on information retrieval. This part is mainly about research on information retrieval of RIISS. This part shows the co-occurrence relations between key words through the relation diagram and then gets the weight of key words in query vector. The vector space retrieval algorithm is designed based on keywords and relation diagram expansion, and the validity of this algorithm is validated.Fifth, study on key technologies of information recommendation. First, this part makes a comparative analysis of commonly used technologies of information recommendation and applies the technology of content-based information recommendation into RIISS. Then, a content-based algorithm of information recommendation is developed.User’s interests are collected through user behavior information collection module of RIISS to build the user’s interest model. After calculation, we can push the recommended results to users. This algorithm is also validated by experiment.Sixth, study on realization and application promotion of RIISS. This part mainly analyses the network operating environment and server/client’s operational requirements of RIISS.It also describes the realization of RIISS information service system and management system, which include both the construction of information services and management service. The information services include E-village, rural economics, rural culture, rural education and civilization, multimedia, and expert Q&A system. And the management services include information retrieval, content management system, user management, data analysis, behavior analysis, information push, expert Q&A management, etc. At last, the application areas and methods of promotion are expounded.In the last part of this paper, we draw up the conclusion and the contribution of the research, and we indicate the shortcomings of the research and discuss the future work.