地理学报 ›› 1989, Vol. 44 ›› Issue (4): 420-428.doi: 10.11821/xb198904005

• 论文 • 上一篇    下一篇

应用沃尔什函数讨论我国旱涝时空变化

唐佑民   

  1. 成都气象学院,成都
  • 收稿日期:1988-10-01 出版日期:1989-10-15 发布日期:1989-10-15

APPLICATION OF WALSH FUNCTION IN STUDYING THETEMPORAL AND SPATIAL VARIATIONS OFDROUGHTS AND FLOODS IN CHINA

Tang Youming   

  1. Chengdu Institute of Meteorology
  • Received:1988-10-01 Online:1989-10-15 Published:1989-10-15

摘要: 本文在文献[1]基础上,应用沃尔什函数理论中的沃氏变化系数物理意义,讨论了我国东部(100°E以东)旱涝的时、空变化,得出了8种旱涝型和1470-1981年全国旱涝型年表。在这基础上,比较了沃氏功率谱与付氏功率谱的计算结果。研究表明:沃尔什函数在分析矩形数字波气象问题时,比傅氏函数有着更好的适用性和优越性。

关键词: 沃尔什函数, 旱涝, 功率谱

Abstract: On the basis of literature the author studied, by using the physical meaning of coefficientsin W AL Function theory, the temporal and spatial variations of droughts and floods in the eas-tern part of our country (east of 100癊). Eight patterns of droughts and floods and the ca-lendar of the patterns for the pariod from 1470 to 1981 are concluded. Also, the spectrumanalyses of W AL Function and that of Fourier Function are compared.The results also indicate: W AL Function is more suitable and has more superiority thanFourier Function in analyzing ractanglar figure waves meteorological problems.

Key words: Droughts and floods, Walsh Function, Spectrum analysis