Therefore,we adopt fuzzy theory to propose a new notion of sensing fuzzy annulus and provide an analysis approach to fuzzy coverage in sensor networks.

Chance-constrained goal programming model for capital budgeting problems in fuzzy environment;

For the evaluation problem of enterprise competitive intelligence system performance in fuzzy environment,this paper uses the theory tools of fuzzy and information entropy,and a new method based on expression degree is proposed.

This paper makes a study of the supply-chain stock decision under fuzzy environment around the three-grade distribution system composed of a central warehouse,distribution center and many retailers,and establishes an optimized and integrated model of total cost and sevice level.

Aiming at the control system of the reactive power compensation equipment,after having analyzed and compared the traditional scheme of open loop and loop control,the paper pointed out their advantages and limitation,and brought forward the control strategy about the fuzzy closed loop combining partial open loop creationarily,and gave the specific approach.

The definition of T fuzzy subrings is given.

The concepts of fuzzy semiideal and fuzzy quotient ring is introduced and some properties of fuzzy semiideal are discussed.