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中文摘要：
探讨精度与程度的复合,建立并研究新的粗糙集拓展模型.基于精度与程度的逻辑差需求,提出了变精度上近似算子与程度下近似算子的差运算模型,得到了变精度上近似算子与程度下近似算子的差运算的宏观本质、精确描述与基本性质.并用一个医疗实例说明了模型的意义和应用.变精度近似算子与程度近似算子的差运算模型,部分地拓展了程度粗糙集模型和经典粗糙集模型.
英文摘要：
The combination between precision and grade is studied,new extended rough set model is given.Based on logical difference requirement of precision and grade,difference operation model of variable precision upper approximation operator and grade lower approximation operator is proposed.Its macroscopic essence,precise description and basic properties are obtained.A medical example is given to explain the significance and the application of the new model.Difference operation model of variable precision approximation operator and grade approximation operator has partially extended graded rough set model and classical rough set model.
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Multiperiodicity and attractivity of delayed recurrent neural networks with unsaturating piecewise l
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