The question of evaluation of agriculture machine structure optimum has the feature of grey and fuzzy, the traditional methods are greatly limited to solve this problem.
农机化装备结构优化评价的问题具有灰色性和模糊性的特点，对其进行评价分析，传统的方法具有很大的局限性。
Discusses how to apply grey systems to quality estimation. Puts forward methods and procedures of synthetic evaluation of grey systems. Presents two examples to support the theory.
将灰色系统应用于教学质量评估，提出了教学质量以及学校教学管理评估体系的灰色系统综合评判的步骤和方法，并进行了实践。
Methods: Correlation analysis, Grey incidence analysis were used for the quality evaluation of Fructus Arctii in different places.
方法：使用相关分析、灰色关联分析对不同产地牛蒡子做出质量评价。
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