大家都搜：
包络波动
1、prc envelope───中华人民共和国信封
2、fluctuation law───波动规律
3、price fluctuation───[物价]价格起伏，物价波动；价格变动，价格波动
4、fertilization envelope───受精囊
5、envelope───n.信封，封皮；包膜；[天]包层；包迹
6、fluctuation band───涨落带
7、envelope sizes───信封尺寸
8、diffraction envelope───衍射包络
9、fluctuation means───波动意味着
1、envelope order spectrum based on multi-scale chirplet and sparse signal decomposition was proposed and applied to the fault diagnosis of gearboxes with rotating speed fluctuation.───了基于线调频基稀疏信号分解的包络阶次谱方法，并将其应用于变速齿轮箱故障诊断之中。
2、A new type of IJF pulse which has fine performance, low envelope fluctuation is presented.───提出一种性能优越、幅度起伏小、可移植性好的改进IJF码型。