Information linking built by cv present the subject characteristics of information entities over internet . cv acts as information browsing tool and retrieval refining device therefore refresh and deepen user ' s knowledge horizon . application of cv can be divided into function level and technical level with corresponding standard in the wis 受控语言针对web信息内容的主题特征来建立信息链接，通过“用、代、属、分、参”等规范形式标识信息实体间关系特征，成为用户使用因特网信息的浏览工具和检索净化装置。
The research result of the paper indicates that utilizing manual soil dealing with rainwater can reach better depurating effect by reasonable designing and controling . in practical project , especially in the condition of soil with badly penetrating ability and lower groundwater level , can adopt about one meter deepness manual soil laying on the greenbelt and can also design special manual soil depurating equipment around building to dealing with rainwater , which not only assures depurating effect but also saves occupying area and improves environment 本论文的研究结果表明，经合理设计控制，利用人工加人细砂的土层处理雨水径流，可达到较好的处理效果，实际工程中，尤其是在土壤渗透性很差，地下水位较高等情况下，可以在绿地表层采用lm左右的人工土壤层， ‘也可在建筑物附近设计专门的人工土壤净化装置来处理雨水径流，既可保证处理效果，又可节省占地和改善环境。
This paper designs yn03 biomass gas purification in order to join with the biomass cycling fluidized - bed gasification system of usa . this system has many virtues such as low cost , simple operation , high efficiency and avoiding the secondary pollution and so on . finally the paper evaluates this system comprehensively from the economic and technological angles and tests it feasible 本文为与美国依阿华州立大学开发的生物质流化床气化技术相配套，据此原理对yn02型生物质燃气净化装置进行了改进，设计制造出yn03型生物质燃气净化装置的样机，经实际运行试验表明，该系统具有成本低、操作简单、净化效率高、可避免二次污染等优点。
