Flood season has uncertainty and belongs to fuzzy sets.

提出汛期具有不确定性，属于模糊集合。

While fuzzy sets theory can describe fuzziness of matters.

而模糊集理论却能用来描述事物的模糊性。

Two-way selection; Fuzzy Sets; Fuzzy Linguistic Variables.

双向选择； 模糊理论； 模糊语意变数。

We investigate the representation theorems of convex fuzzy sets.

给出了一类凸模糊集的表示定理。

A definition of an affine fuzzy sets based on fuzzy line is presented.

利用模糊直线定义模糊仿射集，研究其有关性质。