Research And Realization Of Network Middleware Of Platform Of Agriculture Expert System

With the development of the technology of the computer at full speed, the middleware has already become one of the three infrastructures of software and the basic platform of application on Internet. It can be used to develop and use the application software that runs at the different platform better. It meets the development and running environment that is standard and independent of computer hardware and operating system.In order to improve the standardized degree, reusable and developing efficiency of development of the agricultural application software, solve the problem that it marches towards to three and multi-layer system distributed environment of structure, improve the integrated ability to the new technology of agricultural expert system. It becomes the inevitable trend that middleware technology is adopted while building the agricultural platform of expert system, which is independent of platform and distributed.On the basis of research on software system for structure technology, middleware technology and agricultural platform of expert system, the system structure of the agricultural developing platform of expert system of intelligence based on the middleware and Internet is proposed. This system structure supports the agricultural development of expert system that can be customized, can be made up. The agricultural expert system made on the basis of this platform has high expansibility, dependability, maneuverability, reusage and it is beneficial to different client.On the basis of the research on the system structure of the platform, some components of basic component storehouse of developing platform are studied and developed, including: data access component, information security service component, inference machine component, and intellectual decision business flow and management component. Several kinds of design patterns are used in data access component, and the ability of visit different data source of the platform is realized by it; Information security service component realizes encryption and decryption to file or data and digest creation of file or data through the usage of internationally agreed encryption algorithm; Inference machine component adopts the forward reasoning way in which the data drive, introduce advanced JESS regular engine, combine multi-thread and Web service technology; The intellectual decision business flow and management component to combine XML technology, has realized the function of the service locator and business procedure controlling.