The appearance of the virtual-host is indicating that the digital-technology is paying a humanity attention to the area of propagates.

Research and implementation on the intelligent driving behavior model of autonomous virtual human;

Research of the Key Technologies for Autonomous Virtual Human;

The application research of the virtual host in internet;

Score Inquiring System in Network based on Virtual Host;

File upload and download in the virtual host;

By the analysis of the connotation and standard of the legal personality,we find that legal personality presents the tendency towards expanding in the modern society,but the tentative plan to give the virtual subject the leg.

According to the analysis and research in the architecture of Virtual Organization(VO),which is a basic concept in grid architecture,a concept called Virtual Topic was proposed,based on the search user behavior,and a system framework was constructed based on the analysis in Web user behaviors,which provided the service of Web key resource page orientation.

Aiming at the issues that current algorithms on watermarking databases could not effectively solve the problem of the primary key attacks,a new watermarking algorithm is proposed in this paper,in which the watermark information is marked by a virtual primary key and operated on the least single bits of relational database.