| 摘要(英) |
In the development of English vocabulary learning, vocabulary learning system is used worldwide. However, the architecture design of client/server which used in e-learning system is changed by the development of applications. One is windows application which is regarded as traditional client/server architecture and the quality of hardware devices will influence the operation of applications directly. We call it Fat Client. Another is web application which for reduce requirements of hardware devices and to enhance supports of operating systems. User can only operate through internet. We call it Thin Client. This two type are used depend on demands.
In addition, some considerations of vocabulary e-learning system like: hardware devices, quality of network, strategies of management, and RIA conception etc. which develop in a new generation we call it Rich Client. It combines Fat Client and Thin Client which can develop independent applications and have the advantage of deploy easily. This makes the use of resources on the balance between client and server. Therefore, think highly of the ability in online/offline modes and easy to install or update for client application are the most important things. Moreover, to solve the problems of overloading and demand latency results from produce individual digital resources, the server have to optimize systematic calculating.
The thesis implements a vocabulary learning system: MyVLS, and to bring up: (1) Client application supports learning in online/offline modes. (2) To deal with synchronization of digital resources and portfolio between client and server. (3) The thesis emphasizes the use of Pre-Calculating which can optimize systematic calculating and enhance system quality. Finally, by experimental evaluation, we can find the design of MyVLS is truly works.
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