摘要
运用小波变换和非趋势波动分析得到了降水量的波动变化特性,探讨了降水量序列的长程相关性及其内在规律性。结合小波分析方法提取了主要的周期和趋势变化特性。采用两种方法在不同时间尺度上对降水序列分析,结果表明和田降水量近几年将持续减少,减少趋势至少将持续21个月。
The wavelet transform and de-trended fluctuation analysis （DFA） were introduced briefly. Then DFA and discrete wavelet were used to analyze the fluctuation characteristic of precipitation in Hotan from 1954 to 2003. It was shown by analysis with the methods of de-trend fluctuation and wavelet transform that the precipitation in Hotan will be decreased in near future for several years, the trend will last, at least, 21 months.
出处
《水电能源科学》
2008年第5期7-9,共3页
Water Resources and Power
基金
国家自然科学基金资助项目(50779052)
