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machine_learning_knowledge.md

Natural language processing

SVD (Singular Value Decomposition)

dungduong

  • A (mxn)

  • U (mxr)

  • D (rxr)

  • V (nxr)

  • U and V are orthonormal and the matrix D is diagonal with positive real entries

dungduong

NMF

There are two ways to avoid softmax:

Negative sampling

Hierachy softmax

References:

http://www.codecogs.com/latex/eqneditor.php

Terms

  • Diagonal matrix: ma trận bậc, ma trận đườnng chéo. Example
  • Orthonormal: ma trận trực giao
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