  Capsule network is the most recent exciting advancement in the deep learning
field and represents positional information by stacking features into vectors.
The dynamic routing algorithm is used in the capsule network, however, there
are some disadvantages such as the inability to stack multiple layers and a
large amount of computation. In this paper, we propose an adaptive routing
algorithm that can solve the problems mentioned above. First, the low-layer
capsules adaptively adjust their direction and length in the routing algorithm
and removing the influence of the coupling coefficient on the gradient
propagation, so that the network can work when stacked in multiple layers.
Then, the iterative process of routing is simplified to reduce the amount of
computation and we introduce the gradient coefficient $\lambda$. Further, we
tested the performance of our proposed adaptive routing algorithm on CIFAR10,
Fashion-MNIST, SVHN and MNIST, while achieving better results than the dynamic
routing algorithm.
