The Research And Implement Of Chinese Input System Based On Dynamic Self-adaptation Language Model

With the rapid development of handheld devices, the Chinese input technology is becoming more and more important. In this thesis, we bring about an intelligent input system of dynamic self-adaptation language model by the way of the dynamic self-learning language model combined with the digital input technology.At the same time, this thesis imports the system to the mobile platform.Firstly, the thesis discusses the encoding scheme of Chinese input method, introduces the n-gram model which is widely used in intelligent input technology, two smoothing algorithms used int the paper to resolve the sparse data of models and the test standard of capability, and presents a dynamic self-adaptation model.Secondly, the thesis presents a method which is used to construct special-domain language model in order to make the dynamic self-adaptation model have the characteristics of special-domain, determines the method how to load the special-domain language model and the original scales of the special-domain language model, and increases the ability of the special-user language model to adapt to different users dynamically. It also generates the dynamic self-adaptation language model by using the model fusion method which is put a forward, which can also resolve the sparse data of the special-domain language model.Thirdly, the dynamic self-adaptation language model containing the special-domain language model is applied to Chinese input system.This thesis tests the performance of Chinese input system which uses the dynamic self-adaptation language model.The experimental results show that the system gets a preferable performance. This thesis applies the dynamic self-adaptation language model to the mobile's input system, which will be of great practical signifincance.Finally, after analysing the system architecture of android and introduces the input method and the characteristics of the Android platform, the thesis describes the progress of implementing the input system.