The grey number decision making based on TOPSIS and subordinate function;

Through establish fuzzy collective of oxide,fix (it's) differentiate reference data from subordinate function,according suitable degree to differentiate acidity and basicity of oxide.

This paper applied subordinate function of fuzzy mathemetics to the classfication of rock drillability.

Fuzzy statistic clustering theory may be applied to establish a subject function taking safety degree of banks as a clustering criterion to classify for quantitative analysis,and Shishou River is taken for an instance.

This paper analyses the main factors effecting partner selection in dynamic alliance and the ratio distribution of the goal,adopting coherence matrix,fuzzy subject function and genetic algorithm in analytic hierarchy process (AHP) to solve the problem of partner selection in dynamic alliance,and tests the feasibility and validity of the algorithm by carrying on instance emulation.

The theory of the fuzzy pattern recognition is described and the subject function with adjustable precision is studied in this paper.

New membership functions and new correctional item of onset time of geomagnetic disturbances are .