A predictive control method based on differential evolution was put forward in connection with changing parameters nonlinear model. By using neural network and accord as input and output data of the system, a predictive model was established. And then differential evolution algorithm was used to do rolling optimization and improve system performance accordingly. At last, GA and DE were used respectively to do predictive simulation to realize the rolling optimization and compare the two results. The two simulation results show that the rolling optimization of predictive control based on DE is better than that based on GA on the whole.

Because of small kernel, high efficiency and openning codes, Linux operating system have been more and more used in embedded development. In this article the process of Linux porting was analyzed, including the establishment of compiling environment, changes and porting bootloader codes, and kernel's porting. A method of Linux porting was given. At last, it took a practice on S3C2410 based on ARM, which proved its feasibility. 

The difference between COM object and object module of .NET framework was elaborated. And the interoperation realization method between COM and .NET while COM as the server and .NET as the client, and con the contrary while .NET as the server and COM as the client was respectively narrated. Calling COM component in unmanaged code (.NET code) and .NET component in managed code was realized by taking advantage of runtime callable wrapper RCW and COM callable wrapper CCW. Thus, in the situation of the .NET technical maturing, programming of using the COM technology will much less than before. But the COM technology would not be completely replaced by .NET in the near future. So a great deal of existent products which are developed using COM component technology are protected and used through realizing the interoperation between the COM and the .NET technology, which also makes the COM programmers use easily the software based on the .NET technology.

Along with wide application of e-mail nowadays, a large number of spam flood into people’s life and bring catastrophe to their work and study. Now new spam is changeable which makes traditional and single method for anti-spam powerless. In response to this problem, three popular spam filtering technologies were introduced, which have been implemented on spam filtering field. After analyzing their advantages and disadvantages, The white and black lists technology, Rule-based filtering technology and Bayesian filtering technology to make the best use of the advantage of these algorithms were integrated. Consequently a layered spam filtering system model was set up, and the performance analysis of the system was made.

It is required that conventional instrument control system should be rebuilt in the atmospheric-vacuum distillation unit in the petrochemical enterprise. Current situation in communication signal category between all kinds of sensors and input devices in the control room was described. Adapting to development that computer control technique is widely used to automation system of petrochemical enterprises, industrial IT Freelance 2000 DCS was adopted to implement production process’ automation controlling of the atmospheric-vacuum distillation unit. According to practical needs of units and safety and stabilization requests of system, DCS’s software and hardware frame were determined. A configuration control plan, which advanced computer control algorithm was applied to the typical control loop of the unit, was described. Finally, installation request for DCS was given. The system can reduce error and promote control precision.