规定语法考虑的问题是如何为正确使用制定规范或规则.Prescriptive grammar is concerned with norms of or rules for correct usage.接着, 要确定产生那个信息的算法或规则.Next, the algorithms, or rules, for generating that information are specified.应用粗糙集理论, 可以从原始的数据中提取有用...