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The backpropagation neural network itself is a variation of many nonlinear, additive statistical models. The field emerged as an independent entity largely beca
by yid 16y ago
The backpropagation neural network itself is a variation of many nonlinear, additive statistical models. The field emerged as an independent entity largely because it had "cool" neurological connotations and was largely ignored by statisticians. The Netflix prize was ultimately won using linear algebra with sensible starting values (the KDD paper that describes the winning method is remarkably easy to read).
- pdhborges 16y agoIs http://www.commendo.at/references/files/kdd08.pdf http://www.commendo.at/references/files/kdd08.pdf (this) the paper you are talking about?
- yid 16y agoNope, it was by Bell and Koren. This one is related, but not the one I originally mentioned: http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5197422 http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5197... I was at the talk but can't for the life of me remember the title, sorry.
- dododo 16y agobackpropagation is just the chain rule of differentiation. each layer of an ANN is logistic regression, which statisticians have been and continue to be interested in. i'm not sure your caricature of the netflix winning solution is correct: i believe it was a blending of around 25 different models (including, i think, the RBM someone pointed about above) each in themselves quite varied from one another. this is typically how these challenges are won.
- yid 16y agoA lot of the top teams had blended submissions, but my characterization was not incorrect: http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5197422 http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5197...
- elq 16y agoI work on the cinematch team at netflix... I've reviewed all of the winning code... your characterization is incorrect. The netflix prize would not have been won when it was without rbm.