Patent ID: 11868432
Assignee: SICHUAN UNIVERSITY
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 4:
5. The method for extracting the kansei adjective of the product based on PCA-E according to claim 4, wherein step S23 further comprises: subjecting the variance matrix C to orthogonal decomposition:

C=PλPT  (3)

wherein, λ=diag(λ1, λ2, . . . , λn), λi (i=1,2,3, . . . , n), denotes eigenvalues of the variance matrix C, which are arranged in a descending order from λ7 to λn; and P=[P1, P2, . . . , Pn], Pi (i=1,2,3, . . . , n), denotes a feature column vector corresponding to λi, and the feature column vector is referred to as an i-th principal component direction.