Real estate fluctuation; stock-flow model; influencing factors; policy Responses;
房地产价格波动； 存量-流量模型； 影响因素； 应对政策；
Chapter four, Regard Sinopec as example, use discounting cash flow model assesses at the stock values of Sinopec.
第四章以中石化为例，使用现金流量折现法对中石化的股权价值进行了评估。
Firstly, through using the UML to build the use-case diagram of each model to analyse the system, it designs the data flow and the databases for the buying-stock-selling system.
首先通过对系统进行用例分析，运用UML建立起系统各模块的用例图，并对进销存系统的数据流程、数据库进行详细的分析与设计。
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