An general item bank is designed for on-line examination. According to the demands of the canonical item bank design, a relational database model is designed.
设计了一种适合于在线考试系统的通用试题数据库，根据规范数据库设计的要求，设计了试题库的关系模型。
Using the cross time, the cross market, the counter-fact method observe the effect under regulation or not and using metrological model to carry on an examination.
采用跨时期、跨市场、反事实的方法对规制前后的效果进行对比验证，利用计量经济学模型检验规制的解释力度。
In the national market, we collect and collate the real estate price index of our country. After pass an examination we set up an ARMA model to predict the future trend of the real estate price index.
在全国市场上，收集整理我国的房产价格指数，通过检验建立ARMA模型对未来的房地产价格指数的走势做出预测。
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