Establishing Comprehensive Discrimination System of Apple Varieties based on Principal Component Analysis
The representative evaluation indicators of Fushi and American No.8 fresh apples are selected and analyzed,also the discriminant function of apple varieties is established to lay the foundation for its discrimination.For each variety,thirteen kinds of physical and chemical indicators of 300 fresh apples are determined.Based on principal component analysis method,the representative evaluation indicators are selected.Meanwhile,five communal indicators are picked out as independent variables to establish the discriminant function.b* (X5),hardness (X6),water (X7),vitamin C content (X10),and titratable acidity (X11) are taken as independent variables and the Fisher discriminant function is used to establish the comprehensive discrimination system of apple varieties,the right rate of which is 100％.This study provides an objective and feasible multi-index comprehensive identification method for the differences identification of apple varieties.And it could provide near-infrared spectroscopy a model which could be used to identify the apple varieties.
variety identificationprincipal component analysisFisher discriminant functioncomprehensive discrimination system
NETL
NSTL
万方数据
维普
