Sparsity-Oriented Nonconvex Nonseparable Regularization for Rolling Bearing Compound Fault under Noisy Environment

Algorithm 1

Iterative algorithm for nonconvex sparse regularization by K-SVD problem.

(1)	initialize
(2)
(3)	calculate the coefficients using a simple gradient descent procedure
(4)	update the dictionary
(5)
(6)
(7)
(8)
(9)	end for
(10)	return