Pilot Studies On CAI Applied In Mobile Environment

The thesis compares and analyzes current technology of wireless platform's building, and presents a mobile learning based on J2ME/J2EE and GPRS, which may gather, transmit and process information efficiently and timely outdoors. The thesis focus mainly on how to design and implement the system of mobile learning, and concentrates on analyzing and discussing three of the system: wireless application architecture, the design of wireless application architecture, the thesis uses N-Tier architecture, that is, wireless client - WEB server - application server - database server. Aiming at the problem of wireless client's design, the thesis deeply parses current existing problems in the design of wireless client, then expands on the client architecture, the design for supporting online/offline operation, data models, data persistence, data refresh and synchronization, messaging and presentation. The thesis uses MVC, Adapter, proxy and chain of responsibility for cliet architecture, and analyzes their performance. Moreover, according to the characteristic of mobile learning, the paper puts forward the solutions for data model, data persistence, messaging, and efficient strategies of data refresh and synchronization. The implementation of mobile learning is demonstrated through the system's functions and design of system's classes. Moreover, the implementations of several main classes are listed and the system is shown.