A Method for Extracting High-Quality Core Data from Edge Computing Nodes

Algorithm 1

Lanczos-based high order singular value decomposition.

Input: Tensor;

Output: core tensor , Orthogonal matrix ;

The tensor is subjected to a mode expansion operation to obtain an expansion matrix ;

For

Given unit initial vector , let , ;

For

;

;

;

;

;

(7)

compute the of Wilkinson Displacement

Performing a Givens transformation on

obtain Orthogonal matrix

return