稀疏编码自编码表达

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:<math>J(A, s) = \lVert As - x \rVert_2^2 + \lambda \lVert s \rVert_1</math>
:<math>J(A, s) = \lVert As - x \rVert_2^2 + \lambda \lVert s \rVert_1</math>
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(If you are unfamiliar with the notation,<math>\lVert x \rVert_k</math> refers to the Lk norm of the x which is equal to <math>\sum x^k_i</math>. 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,<math>\lVert x \rVert_k</math> refers to the Lk norm of the x which is equal to <math>\sum \|x^k_i\|^\frac{1}{k}</math>. 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]

Revision as of 05:38, 8 March 2013

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