In plain words: A new sequence-reading network remembers every earlier step by averaging them all, not just the last one, and keeps a running total so it stays as cheap as usual networks. It beat the usual memory-based network on almost every task tried.
Abstract
Recurrent Neural Networks (RNN) are a type of statistical model designed to handle sequential data. The model reads a sequence one symbol at a time. Each symbol is processed based on information collected from the previous symbols. With existing RNN architectures, each symbol is processed using only information from the previous processing step. To overcome this limitation, we propose a new kind of RNN model that computes a recurrent weighted average (RWA) over every past processing step. Because the RWA can be computed as a running average, the computational overhead scales like that of any other RNN architecture. The approach essentially reformulates the attention mechanism into a stand-alone model. The performance of the RWA model is assessed on the variable copy problem, the adding problem, classification of artificial grammar, classification of sequences by length, and classification of the MNIST images (where the pixels are read sequentially one at a time). On almost every task, the RWA model is found to outperform a standard LSTM model.
Jared Ostmeyer, Lindsay Cowell
arXiv:1703.01253 · stat.ML, cs.LG · submitted Mar 3, 2017 · updated May 4, 2017
abstract · pdf · html