信号处理或者模型信号设计中常常需要的简谐信号设计，可以作为模型训练信号输入或者是验证信号，包含信号光顺环节以平滑过渡。-Harmonic signal design, which signal processing or model signal design often need. This signal can be used as a model training or a verification signal input, in combination with a smooth tr