The Application of Grape Grading Based on PCA and Fuzzy Evaluation

Qian Qiuye ； Wang Yufei ； Weixia Luan ； Wang Guizhou

《Advance Journal of Food Science and Technology》 5卷11期 (2013/11) Pp. 1461-1465

https://doi.org/10.19026/rjaset.5.3367

摘要

This study grades the wine grape based on the data of physical and chemical indexes of wine grape and the quality of wine in 2012 CUMCM. Since the physical and chemical indexes of wine grape are numerous, we firstly adopt principal component analysis to select the main physical and chemical indexes which can represent most of the property of wine grape. Then, we take the comprehensive score of wine quality as the quality index of wine grape. Later, taking the contribution rate in principal component analysis and quality of wine as the fuzzy evaluation weights, we set up a fuzzy comprehensive evaluation model for the grading of wine grape according to the international standard of wine grade. The grades of the red and white wine grape all belong to 3, 4 and 5 grade, respectively and the grading result can well prove that the quality of wine can reflect the quality of wine grape to some extent.

關鍵字

PCA fuzzy evaluation ； wine grape grading