Abstract
Concerning the problem that uncertainty information is difficult to be merged during the decision-making process of multi-source irrigation information,a decision fusion method based on fuzzy rough set and Dempster-Shafer(D-S) evidence theory was proposed.Using the fuzzy rough set theory,the basic probability distribution function was established,the interdependence between irrigation factors and irrigation decision was calculated,and the identification framework of irrigation decision on the multiple fusion irrigation factors was built.Using the improved D-S evidence theory,the multi-source irrigation information was fused at the decision-making level,the expression and synthesis problems of uncertain information were solved.The information of winter wheat such as soil moisture,photosynthetic rate and stomatal conductance in north China was fused in irrigation decision by the application of the methods mentioned above.The results show that the uncertainty of the irrigation decision decreases from 38.0% before fusion to 9.84%.The method can effectively improve the accuracy of irrigation decision and reduce the uncertainty of the irrigation decision.
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