A new incidence Degree Model of Interval Grey Number based on space mapping

Based on the space mapping method, we proposed a new incidence Degree Model of Interval Grey Number. This model digs the geometric meanings of interval grey number. Through calculating the length and midpoint coordinates of interval grey number line, an interval grey number sequence is converted into a group of real number sequence; and then a incidence degree model of interval grey number is set up on the foundation of the Deng´s incidence degree model; finally, an example demonstrates the calculation process of the new model. Compared with the original model, there are some properties of this model: First, Calculation is simple; second, grey point sequence and grey length sequence contain all the information of Interval Grey Number sequence. One can obtain a satisfied Incidence Degree of Interval Grey Number by this new model.