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Small and simple neural network implementation for research
Dropout is bees knees: http://arxiv.org/pdf/1207.0580
At the moment the sparse corpus is also a binary corpus (all features are either 0 or 1). I guess we should extend it to being able to handle the current data format and also the libsvm format, so you can add values for the features.
In order to apply miniNN to vision tasks like USPS or to traditional data mining challenges, it would be necessary to allow for dense real-valued input data. How hard would this be?
Is it normal that convergenge for learning XOR is so very dependent on the initial weights?
Initial weights should probably depend on the activation function used in the hiden layer. Also we switched from standard sigmoid, 1/(1+exp(-x)), to tanh but weights are still initialized using a sigmoid receipe
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