| 摘要: |
| 在快速滤波分解信号为最宽带通本征模态函数方法(简称 FFDSI方法)的基础上,引入了主控模态函数的概念。将其应用于Chichijima水文站水位信号,从中分解出3个96.93%-主控模态函数,分别 代表着不同于调和分潮,且与天体运行规律更加吻合的3种模态潮型。由此可见,主控模态函数在信号分析中的应用价值。 |
| 关键词: 本征模态函数 FFDSI分解法 主控模态函数 希尔伯特谱 |
| DOI： |
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| 基金项目:国家自然科学基金资助项目(40476062) |
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| Principal mode function and its application in sea level data analysis |
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| Abstract: |
| The concept of principal control mode function is introduced on the basis of the Fast Filtering to Decompose Signal into IMFs method(FFDSI). By applying it to analyze the sea level data from Chichijima station, we get three 96.93%-principal control mode functions standing for three mode tidal types respectively, which are different from the harmonic tides but coincide well with the movement of celestial bodies. |
| Key words: intrinsic mode function(IMF) FFDSI method principal control mode function(PCMF) Hilbert spectrum |
