In this paper, the mathematical foundation study of rough sets and the study of two general rough sets models are mainly researched.

本文主要进行了粗糙集的数学基础研究，与程度粗糙集和变精度粗糙集两个广义粗糙集模型的探讨。

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At the same time, this research also introduces the theory foundation, study purpose and research significance, the research methods and ideas.

同时还介绍了本研究的理论基础，研究目的及意义，以及本文的研究思路和方法。

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2012-2015 The project of National Natural Science Foundation——"Study on differentiation and reconfiguration mechanism and transformation of the specialized market in China".

2012-2015，国家自然科学基金项目-“我国专业市场分化重构机制与转型提升研究”。

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2012-2015 The project of National Natural Science Foundation——"Study on differentiation and reconfiguration mechanism and transformation of the specialized market in China".

2012-2015，国家自然科学基金项目-“我国专业市场分化重构机制与转型提升研究”。

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