Introduce the system function model and its B/W/D structure in chief, and put its emphasis upon the system key techniques which are connection pool, cache and photographing online, etc.

• 摘要介绍了系统的功能模型及其采用的B/W/D结构，并重点阐述了系统采用的连接池、高速缓存和在线摄像等关键技术。