这样表示的x（n）仅是整数以的函数，所以又称x（力）为离散时间序列（discrete time series）。x（n）在时间和幅度都取离散值，这样的信号称为数字信号（digitalsignal）削。
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multi-dimensional discrete time series 多维离散时间序列
Discrete-time Fourier series pair 离散时间傅立叶级数对
discrete parameter time series 离散参数时间序列 ; [统计] 离散参数时间数列
discrete time Fourier series 离散时间傅立叶级数
discrete-time fourier series 离散时间傅立叶级数
We give multifractal detrended fluctuation analysis and Hlder analysis of discrete time series and use them to study the temperature time series fluctuations.
给出了离散时间序列多重分形除趋势涨落分析方法和霍尔德指数的计算方法，并用它们研究了气温时间序列。
This paper describes the need to transform the continuous periodic signal in time domain to the discrete signal in frequency domain by using Fourier Series (FS).
讨论了利用傅里叶级数把连续周期时域信号转换成离散的频域信号的必要性。
This paper proved that a frequency stochastic sequence obtained from a stationarily correlated time series by using discrete Fourier transform is orthogonal.
本文证明了时间域内的平稳相关序列经离散傅里叶变换之后，听得到的是频域内的正交随机序列。
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