This is a neural network based technique that introduces a phase function to the learning process.

这篇论文介绍的是一种基于神经网络的技术，它将相位函数引入到了学习过程中。

With this phase function, the neural network recognizes that we are not only learning periodic motions, but it knows when these motions start and when they end.

有了这种相位函数，神经网络就不仅仅认识到我们在学习周期性动作，还知道这些动作该何时开始和结束。