HESSPROP: Mitigating Memristive DNN Weight Mapping Errors with Hessian Backpropagation
AbstractA universal objective function to minimize mem-ristive crossbar deep neural network weight mapping errors through Hessian backpropagation (HessProp) is presented. Hes-sProp minimizes the L2 norm of the neural network gradient to achieve a flat minima in a neural network's weight space. We hypothesize that this leads to robustness against small perturbations of weights. The stochastic weight mapping phenomenon on memristor crossbars is simulated, and the proposed method was evaluated on image classification tasks using the MNIST dataset. The result demonstrates on average 40.81% and 41.45% groundbreaking accuracy increase for distilled and large memristive convolutional neural networks in worst-case scenarios.