In the first part , we analyze the risk and reasons that a securities corporation in china is facing at present , then develops a securities corporation risk control system based on the realities in china by the ways of advanced qualitative management pattern from oversea . in the second part , we consider the existing situations that market risks became a major problem to a securities corporation , we have a method to measure developed market risk by adopting an advanced quantitative model var which is popular internationally , and we focus on studing risk metrics ( var - covar ) application in securities market of china practically . we conclude that var model is useful and effective at controlling market risks in china by our analysis and test 第一部分通过对证券公司风险及风险成因的分析，借鉴国外先进管理模式提出了构建符合中国国情的证券公司风险控制体系，对目前我国证券公司主要业务的风险点及风险管理进行阐述，并佐以案例；第二部分针对市场风险日益成为证券公司主要风险的现状，引入了国际上最广泛使用的市场风险控制方法? ?风险价值法( var ) ，从实用角度重点研究了方差协方差法在我国证券市场的应用，通过实证分析得出了在我国使用var控制市场风险是切实可行的结论。
Based on the characteristics and connotation of forest ecosystem services , the physical and value assessment methods , including market value method , shadow engineering price method , production cost method , opportunity cost method and administering expenditure method , were used to evaluate forest ecosystem services in yashushan natural reserve 摘要根据福建宁化牙梳山自然保护区森林生态系统的特征和森林生态系统服务功能的内涵，采用物质量和价值量相结合的评价方法，使用市场价值法、影子工程价格法、生产成本法、机会成本法、治理费用法等定量评价了宁化牙梳山自然保护区森林生态系统服务功能经济价值。
