基于可变模糊评价模型的玉米膜下滴灌质量评价体系研究

Research on Quality Evaluation System of Drip Irrigation under Maize Film Based on Variable Fuzzy Evaluation Model

玉米膜下滴灌质量评价是一个比较复杂的多指标、多级模糊评价问题。可变模糊集原理是评价玉米膜下滴灌质量的方法之一,通过变换参数建立不同的分级特征值计算模型,可以提高评价结果的可靠性。该文在介绍可变模糊模型原理的基础上,对吉林省西部玉米膜下滴灌质量等级进行评价。结果表明,连续4个试验年的质量等级均为"中等"以上,两年达到"良好"等级,评价结果呈逐年上升趋势。评价结果符合实际情况,证明了该评价体系具有可靠性、便捷性和适应性,填补了玉米膜下滴灌质量评价体系的空白。

Based on the principle of variable fuzzy set, the quality evaluation system of drip irrigation maize underfilm was established. According to the experimental data from 2015 to 2018 of Xiangyang Village, Tongyu County,the quality evaluation index system of "one target, three layers and 20 indicators" was constructed. Using Delphi programming language, the system was proved to be efficient and accurate by means of extreme value method and case method. The quality evaluation of drip irrigation under maize film was a complicated multi-index and multi-level fuzzy evaluation problem. The principle of variable fuzzy set was one of the methods to evaluate the quality of drip irrigation maize under film. The reliability of evaluation results could be improved by changing parameters and establishing different hierarchical eigenvalue calculation models. On the basis of introducing the principle of variable fuzzy model, the quality grade of drip irrigation maize under film in western Jilin Province was evaluated in the paper, and the results showed that the quality level in 4 years was above "medium", among which, the quality level reached "good" in last two years, and the evaluation results showed an upward trend year by year. The evaluation results were in line with the actual situation, which proved that the evaluation system was reliable, convenient and adaptable, which filled the blank in the quality evaluation system of drip irrigation under maize film.