Fuzziness, fuzzy concept and theory of relative membership degree are detailed based on the perspective of dialectical materialism on difference and common dimension, medium transition and two poles.

• 摘要根据辩证唯物论关于差异与共维、中介和两极的观点，详细论述了模糊性、模糊概念、相对隶属度、相对隶属度函数等相对隶属度理论。