Abstract: Aiming at the problems that fuzzy soft sets’ attribute weights are often ignored or subjective experience is relied on to determine in the process of group decision-making,we proposed a method for determining attribute weights based on the attribute dominance degree and discussed its related properties and operations.In group decision-making process,according to this characteristic of the decision-making information varying with time,the concept of time-series fuzzy soft sets was defined and the logarithmic growth model time weights formula based on the decision-making time difference was established.Finally,we used comparative analysis with other decision-making methods to verify the feasibility and rationality of the approach.

Key words: Fuzzy soft sets,Attribute weights,Time-series fuzzy soft sets,Dominance degree,Time weights