Convolutional neural network models have recently been shown to achieve excellent performance on challenging recognition benchmarks. However, like many deep models, there is little guidance on how the architecture of the model should be selected. Important hyper-parameters such as the degree of parameter sharing, number of layers, units per layer, and overall number of parameters must be selected manually through trial-and-error. To address this, we introduce a novel type of recursive neural network that is convolutional in nature. Its similarity to standard convolutional models allows us to tease apart the important architectural factors that influence performance. We find that for a given parameter budget, deeper models are preferred over shallow ones, and models with more parameters are preferred to those with fewer. Surprisingly and perhaps counterintuitively, we find that performance is independent of the number of units, so long as the network depth and number of parameters is held constant. This suggests that, computational efficiency considerations aside, parameter sharing within deep networks may not be so beneficial as previously supposed.

本文考察卷积神经网络中层数、特征图数量和参数数量对模型性能的影响，结果表明，增加层数和参数数量都有明显改善，而特征图数量（和表示的维度）对模型性能影响较小，更应关注这些层中的参数数量。

使用递归卷积网络理解深层结构