Rough set-based method of combinatory logic optimization was presented by using knowledge expression of logic function with rough set theory, and its corresponding algorithm was given, also.
运用粗集理论对逻辑函数进行知识表达的方法，提出了基于粗糙集的组合逻辑优化方法，并给出了相应的算法。
A function space model and corresponding pulse transfer function matrix of multirate digital control systems are constructed by using function space method and two different lifting techniques.
采用函数空间的方法，利用先后两次的提升技术，构造出多采样率数字控制系统的函数空间模型和相应的脉冲传递函数矩阵模型。
The anomalies are analyzed with sliding mean and secondary function method. The results show that the medium term anomalies of radon are corresponding well with the two events.
应用水氡异常的滑动平均值和从属函数的判定方法做进一步分析，结果表明，磁山井水氡值的中期异常与华北地区的这两次中强地震有较好的对应关系；
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