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Table 1 Special cases of the GS kernel

From: Learning a peptide-protein binding affinity predictor with kernel ridge regression

Fixed parameters

Freeparameters

Kernel name

L = 1, σ p  → 0, σ c  → 0

 

Hamming distance

L → , σ p  → 0, σ c  → 0

 

Dirac delta

σ p  → , σ c  → 0

L

Blended Spectrum [14]

σ p  → 

L, σ c

Blended Spectrum RBF [23]

σ c  → 0

L, σ p

Oligo [15]

L → , σ p  → 0

σ c

Radial Basis Function (RBF)

σ p  → 0, σ c  → 0

L

Weighted degree () [16]

σ p  → 0

L, σ c

Weighted degree RBF () [23]

 

L, σ p , σ c

Generic String (GS)

  1. () Substituting ψl by ψ l - ln β l where the β l ’s are the weighted degrees defined in [16]. Eight known kernels can be obtained by fixing different parameters of the GS kernel.