Upgrade to Pro — share decks privately, control downloads, hide ads and more …

MATHEMATICAL FORMULATION AND APPLICATION OF KER...

Y-h. Taguchi
September 28, 2021

MATHEMATICAL FORMULATION AND APPLICATION OF KERNEL TENSOR DECOMPOSITION BASED UNSUPERVISED FEATURE EXTRACTION

Presentation at IIBMP2021
https://iibmp2021.hamadalab.com/

Y-h. Taguchi

September 28, 2021
Tweet

More Decks by Y-h. Taguchi

Other Decks in Science

Transcript

  1. Y-H. Taguchi and Turki Turki Mathematical formulation and application of

    kernel tensor decomposition based unsupervised feature extraction Knowledge-Based Systems (IF=8.0) Volume 217, 6 April 2021, 106834 https://doi.org/10.1016/j.knosys.2021.106834
  2. 11 N variables N 1 M measurements M/2 M measurements

    Gaussian Zero mean Gaussian Non-zero mean M2 samples /variable i≦N 1 :distinct between j,k≦M/2 and others i>N 1 : no distinction Task: Can we identify N 1 variables correctly? 人工データ
  3. 16 Feature selection Feature selection Linear Kernel: x jkj’k’ →

    u l1j , u l2k u l 1 i ∝∑ jk x ijk u l 1 j u l 2 k P i =P χ2 [> (u l 1 i σl 1 )2] Computed P-values are corrected with considering multiple comparison corrections by Benjamini-Hochberg method. Features with corrected P-values <0.01 are selected. TD
  4. 17 RBF, Polynomial Kernels Exclusion of a specific i i

    Recompute x jkj’k’ x jkj’k’ → u l1j ⨉ u l2k TD Estimate coincidence between u l1j , u l2k and classification of (k,j) Rank i i based upon the amount of decreased coincidence u l1j ⨉ u l2k k