We give multifractal detrended fluctuation analysis and Hlder analysis of discretetimeseries 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。
2
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。
3
This paper proved that a frequency stochastic sequence obtained from a stationarily correlated timeseries by using discrete Fourier transform is orthogonal.