compares several air distribution, because of different air velocity of big and small ball of the matching hall, describes HVAC system air distribution of the matching hall, determines cold and beat source and smoke control, and proposes some opinions ,offers advises for similar buildings.

The Tournament in the Middle Age:a Case Serving to Help Probing into the Conflict Between the Church and the Knights;

The tournament was an important activity for knights in Middle Ages of Western Europe and its origin was closely related with war.

On the basis of analyzing the achievements of the scientific research and service for the shooters,the article discusses the relative issues concerning the improvement of shooters\' competitive ability in major competitions so as to help coaches,athletes and researchers upgrade the quality of pre-game training.

The Preliminary Study on the Major Influencing Factors of Air Quality in Immigration Hall at Luohu Port

Based on design a network chess game center,this paper explains the function and communication process of client hall and the server,the application of multithread and block mode socket technology in client and server,after that presents a code framework for a multithread tcp client and server,which is applicable in the design of chess and card online game center.