This thesis analyzes the characteristic and regulation of anti-spam technologies. Based of these facts, this paper brings forward a collaborative anti-spam filtering model for E-mail. Our system not only defends the repeated spam mails at the router layer but also has a higher accuracy than Spam Assassin. Presents the structure of the model and give some necessary sketch maps. Explicates carefully our idea of the design and many technologies related to the model and discusses especially many key-points too. Finally, we give the experiment results.

In this paper, we have mainly analyzed the relationship between virtual prototype and concurrent design. Then we have concluded the model of virtual prototype and simulation method which based on field object. We also have studied the design of wind power generator’s vane which based on computer, and have simulated the process of vanes’ aerodynamics.