合成算子 meaning in English

composition operator

Fuzzy relation geometric programming with max - product composition
具有取大取小合成算子的模糊关系几何规划
The relationship between the coarsening or refining operations and the combining operations of a belief structure are investigated . it is proved that the refining operation and two kinds of combining operations are both commutative with each other ; while the coarsening operation is only commutative with the disjunctive sum operation but not with the conjunctive sum operation . we pointed out the reason why th e coarsening operation and the conjunctive sum operation cannot be commutative
讨论了信任结构的粗化和细化算子与信任结构的合成算子之间的关系，证明细化算子与两种合成算子均是可交换的；而粗化算子只与析取和算子可交换，却合取和算子不可交换，并指出了其不可交换的原因所在。