Abstract: For transmission design schemes to main structure of Tapered Roller Screen for Thermal Power Plant,we propose the intact optimization algorithm of Vague sets for transmission decision schemes．Applying similarity measures analysis of vague sets,we come up with more than two ways that was transformed from interval data to vague data that based on a set of new similarity measure formula for vague sets(value)．Two kinds of proposed formulas are two technical supports for optimization algorithm of vague scheme．Experimental results show that the proposed formulas and optimization algorithm of vague scheme can provide a useful way for the application examples.

Key words: Vague sets,Decision of schemes,Similarity measures,Interval-valued data,Conversion formulas