1.Convert fashion-MNIST data to matlab format
2.Pretrain the neural network with RBM
3.update parameters by backpropagation
Data: https://www.kaggle.com/zalando-research/fashionmnist
Code revised from: http://www.cs.toronto.edu/~hinton/MatlabForSciencePaper.html (by Ruslan Salakhutdinov and Geoff Hinton)
References: "Reducing the Dimensionality of Data with Neural Networks", G. E. Hinton and R. R. Salakhutdinov, 2006