In order to establish the standard of evaluating the quality homogeneity of flue-cured tobacco stripe in threshing and redrying,the tobacco stripe samples from 20 threshing and redrying factories in China were analyzed.The representative indexes of tobacco stripe quality were selected out by the means of gray clustering analysis,every evaluation method was analyzed,and the suitable evaluation objects and standard were collected.The evaluation model of tobacco stripe quality homogeneity was built by using the method of coefficient of variation,and the model was verified by examples.The results indicated that the method of coefficient of variation could be used as the standard of evaluating the quality homogeneity of tobacco stripe in threshing and redrying,and it could be widely spread.

为研究杨尺蠖危害杨树的测报技术,经7a对其主要习性和发生规律进行系统的观测,研制出发生期预测的历期法、统计法,发生量预测的有效基数法、水分积分指数法,并通过树干解析和危害水平的测算,得出了其1龄幼虫末期密度的防治临界限。本测报技术经预测检验历史符合度较为准确。