Research On The Textclassfication Based On The Semi-supervised Learning

In recent years, with the upgrading of the friction event offshore in our country, the way for the development of air craft is the only way to improve the capability of national defence.Recently, the appearance of Liaoning Ship has greatly promote the development of the aircraft business in our country .The followed problems are how to conquer numerous technical problems of the air craft independent. In these problems, how to let the aircraft carrier take off safely is not only the keynote, but also is technical difficulty. Only through constantly simulation drill, can we expose more possible faults in the process of landing ,then we can improve the landing scheme and improve landing safety. As today's mainstream of distributed simulation.HLA has getwidely used in complicated system simulation. HLA has a prominent advantage in interoperability of various simulation applications and reusability of simulation resources. The text first analyzes the HLA simulation systems, introduce the current mainstream simulation system architecture combined with the characteristic of landing system, and put forward and design event driven simulation software system architecture .Compared with other software architecture, event-driven simulation system architecture can better satisfy the simulation requirement of landing system and have outstanding performance in the aspect of real-time simulation. The infrastructure of later text is based on this. Then, from the mathematical model of carrier aircraft, introduce the needed coordinate system for the modeling of carrier aircraft, analyzes the needed state parameters in the modeling process of carrier aircraft, and establish the models of carrier aircraft's six degrees of freedom and mathematical kinematics. At the same time, in order to improve real-time of simulation, based on the analysis and construction of traditional simulation model of carrier aircraft and taken into account of the possible changed environmental factor in the process of landing, we need to improve the original model and raise the methods to dynamic model to satisfy the real-time needs of the complicated landing system, improve the safety of landing. And we can utilize the traditional fourth order runge-kutta to construct the numerical calculation of the model. Lastly, the text realizes the program design of the simulation model based on the VC++ platform, verifies the reliability of the simulation model,and proposes different solutions for the possible complicated environment of the imitation simulation in the real landing process.