Before revision:  Furthermore, the computation time costs of using the proposed system to calculate the respiratory rate are less than that of edge+cloud architecture and cloud architecture  .
After revision:  Furthermore, the computation time costs of using the proposed system to calculate the respiratory rate are less than that of edge+cloud architecture and cloud architecture . Moreover, we use our three-tire architecture for CT image diagnosis task decomposition. The evaluation of a CT image dataset of COVID-19 proves that our three-tire architecture is useful for resolving tasks on deep learning networks by edge equipment. There are broad application scenarios in smart hospitals in the future .