The main idea and algorithm of the projection pursuit regression(PPR)based on immune evolutionary algorithm(IEA)are introduced to study the data of the Dongguan’s precipitation of 2003.The model of PPR was built to predict the pH value in precipitation.The result shows this method is steady and has good prediction precision,and has a better prediction result than that of MLR.
Robust partial leastsquares algorithm was carried out on determining distillation ranges and octane number of reformed gasoline by NearInfrared Spectroscopy(NIR).The computing standard error of the initial boiling point was 00349,while those of the other distillation ranges and octane number were better than that of IBP,and the standard error of 50 percent distillation range arrived at 00055.RPLS is rapid and robust,and has good accuracy and repeatability,and it will be an effective method in correcting distillation ranges and octane number of reformed gasoline.
