“…It can be seen that X contains 5 elements, and elements in particle θ are angles between X and [1, 0, 0, 0, 0], [0, 1, 0, 0, 0], [0, 0, 1, 0, 0], [0, 0, 0, 1, 0], [0, 0, 0, 0, 1]. The index number of cos θ sorted from small to large becomes [5,2,1,4,3]. According to the reference decision value M, X becomes [13, 9, 14, 16, 1] after mapping.…”