nonperiodicity
n.非周期性:指某种现象或过程没有固定的、重复出现的时间间隔。
例句
Chaotic signal has the properties of ergodicity, nonperiodicity, continuous broadband power spectra, and noise like etc.
混沌信号具有遍历性、非周期、连续宽带频谱、似噪声的特性。