Study Improved Background Value Functions of Non-Equidistance GM(1,1) Model in Surveying and Mapping Engineering

Abstract

There are some losed datum or mistake datum when GM（1，1）model deals engineering matter,so equidistance GM(1,1) model is restricted and choosing non-equidistance GM(1,1) model is very necessary.The backgroung value functions of modeling research on non-equidistance GM(1,1) model is studied and is considered to be wrong,and strict backgroung value functions is advanced in the paper.The theory and practice approach of the strict method is introduced particularly.Feasibility and validity of this mothod is gained through surveying and mapping engineering .So, the paper has some significance of theory and practice.

Study on GM(1,1) Boundary Model based on Surveying Engineering

“…Because GM (1,1) model is simple, and it has higher prediction accuracy based on a few samples ,so,it has been widely used in surveying engineering such as high slope safety monitoring, building settlement prediction, prediction of dam, landslide monitoring, etal [1][2][3][4][5][6][7][8][9][10], and has been continually developed.Currently,we watched researches of GM (1,1) are ascending,and boundary condition of GM(1,1) is an important research direction.…”