# 稀疏编码自编码表达

 Revision as of 05:33, 8 March 2013 (view source)Kandeng (Talk | contribs)← Older edit Revision as of 05:38, 8 March 2013 (view source)Kandeng (Talk | contribs) Newer edit → Line 45: Line 45: :$J(A, s) = \lVert As - x \rVert_2^2 + \lambda \lVert s \rVert_1$ :$J(A, s) = \lVert As - x \rVert_2^2 + \lambda \lVert s \rVert_1$ - (If you are unfamiliar with the notation,$\lVert x \rVert_k$ refers to the Lk norm of the x which is equal to $\sum x^k_i$. The L2 norm is the familiar Euclidean norm, while the L1 norm is the sum of absolute values of the elements of the vector) + (If you are unfamiliar with the notation,$\lVert x \rVert_k$ refers to the Lk norm of the x which is equal to $\sum \|x^k_i\|^\frac{1}{k}$. The L2 norm is the familiar Euclidean norm, while the L1 norm is the sum of absolute values of the elements of the vector) [初译] [初译]