Title :
Criterions of comparing two function transformations with the same monotonicity to raise the second class smooth degree
Author :
Wei, Yang ; Sun, Yanna
Author_Institution :
Dept of Grad. Students, China West Normal Univ., Nanchong, China
Abstract :
Abstract-Criterions of comparing two function transformations with the same monotonicity to raise the second class smooth degree is presented in this paper, and we prove the transformation F(ak) =ak/dok-1 only changes the first class smooth degree of the data series, but can´t change the second class smooth degree of the data series. That is, the effective measures for the first class gray forecasting model to raise the forecasting accuracy may no longer be effective for second class gray forecasting model.
Keywords :
forecasting theory; grey systems; data series; first class gray forecasting model; first class smooth degree; forecasting accuracy; function transformation; monotonicity; second class gray forecasting model; second class smooth degree; GM(1,1); function transformation; modeling data columns; smooth degree;
Conference_Titel :
Systems Man and Cybernetics (SMC), 2010 IEEE International Conference on
Conference_Location :
Istanbul
Print_ISBN :
978-1-4244-6586-6
DOI :
10.1109/ICSMC.2010.5642002