Apple quality grading Computational fluid dynamics 2 Computational fluid dynamics simulations Decision trees 2 Detection system 2 Digital storage 2 Discriminant analysis 2 Electronic nose 2 Fruits 2 Internal quality 2 K-near neighbor 2 K-nearest neighbor 2 Machine design 2 Motion compensation 2 Nearest neighbor search 2 Nearest-neighbour 2 Nose detection 2 Principal component analysis 2 Quality control 2 Quality grading 2 Support vector machine classifiers 2 Support vector machines 2 Support vectors machine 2 apple quality grading 2 computational fluid dynamics 2 electronic nose 2 support vector machine 2