关键词: 农技推广；云平台；知识地图；设计；向量空间模型

Abstract:

The Cloud Platform of Agricultural Technology Extension is a comprehensive knowledge platform serving for the agricultural technicians all over China. It provides various knowledge services, such as knowledge learning, exchange, sharing and creating opportunities of interacting with agricultural experts. Along with the implementation of various projects, the data quantity increased rapidly. The platform urgently needs an effective knowledge management tool to help the technicians in finding the most needed knowledge in a short time. Knowledge map (K-Map), as a knowledge management tool, has been applied in many fields. These maps can provide users an intuitive and graphical knowledge guide, reveal the relationship between knowledges, and promote knowledge exchange and sharing. This paper introduces the Cloud Platform of Agricultural Technology Extension, and the development and characteristics of K-Map. On these basis, this paper put up an idea about applying K-Map to the fields of agricultural science, and designed a scheme of constructing K-Map in the Cloud, including design of K-Map total structure, extract of position and content attributes among static knowledge nodes, social tagging of dynamic knowledge nodes, design of knowledge network correlation algorithm. A strategy of showing K-Map was illustrated in detail. Besides，K-Map on Cloud Platform of Agricultural Technology Extension had been initially realized according to the scheme.

Key words: Agricultural Technology Extension, Cloud Platform, knowledge map, design, VSM