关键词: 函数单向S-粗集对偶, f-模型, F-模型, F-模型定理, 单向动态特征

Abstract: By employing function one direction S-rough sets，the generation method and correlative concepts of f-model and f-t order one direction dynamic model of R-function equivalence class[u（x）]，and the generation method and the correlative concepts of F-model and F-one direction dynamic model are proposed；then the order relation theorem and the dynamic separation theorem of F-one direction dynamic model are presented.The dynamic characteristic of F-model depends on the attribute cancellation to the attribute set α.The generation principle of F-model and its application are given on the basis of the researches above.

Key words: dual of function one direction S-rough sets, f-model, F-model, F-model theorem, one direction dynamic characteristic