Optimal Selection of Water-saving Irrigation Project Scheme Based on Projection Pursuit Model
Shi Tie-yu · Jieshui guan'gai · 2009
A new method,named projection pursuit(PP) model,is presented in this paper to optimize selection of water-saving irrigation schemes.By using PP model,multi-dimension evaluation indexes values of each scheme can be synthesized to one dimension projection value,which indicates advantage of each scheme.So the scheme samples can be optimally selected according to the projection value of each scheme.The PP model based on real coded accelerating genetic algorithm can simplify the realization process of projection pursuit technique and supply a new tool for wide application of projection pursuit technique in water-saving irrigation schemes.The practical result shows that the application of PP model driven directly by samples data in optimal selection of water saving irrigation schemes is both simple and feasible.The PP model has such advantages as relatively dispersive projection values,easy decision-making,good applicability and maneuverability.It does not require determining the weights of evaluation indexes values of each scheme,so its results are objective.