TASG: An Augmented Classification Method for Impersonal HAR

Table 1

Notations.

Notation	Description
n	The number of activity class
nf	The number of feature
Ai	i-th activity
Gi	i-th group
Δi	The number of Ai
D	Dictionary
αi,k	The sparse coefficient of k-th feature in Ai
Ni,k	The number of nonzero sparse coefficient in αi,k
Si,j	Similarity between activity i and activity j
M	Similarity matrix