| 福州“23型”寒露风的谐波分析及其应用 |
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| 引用本文： | 陈家豪.福州“23型”寒露风的谐波分析及其应用[J].福建农林大学学报(自然科学版),1992(2). |
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| 作者姓名： | 陈家豪 |
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| 作者单位： | 福建农学院农学系 福州 |
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| 摘 要： | 以日平均气温低于23.0℃、持续3d或3d以上的低温过程作为出现“23型”寒露风的指标,根据谐波分析原理,对福州1951—1990年的“23型”寒露风初日进行统计分析,建立了谐波模式:y_=30.75+3.73cos(27t_)-4.38sin(27t_)+2.22cos(18t_)+4.37sin(18t_)-1.04cos(9t_)+4.59sin(9t_)。利用这个模式,分析福州“23型”寒露风变化趋势及其对连作晚稻生产的影响。
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| 关 键 词： | 寒露风 谐波分析 福州 |
The Harmoic Analysis and Its Application of the "Type 23" Low Autumn Temperature in Fuzhou |
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| Chen Jiahao.The Harmoic Analysis and Its Application of the "Type 23" Low Autumn Temperature in Fuzhou[J].Journal of Fujian Agricultural and Forestry University,1992(2). |
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| Authors: | Chen Jiahao |
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| Abstract: | On the principle of harmonic analysis and using less than 23.0 degrees centigrade on the average a day for three consecutive days or above three days as the norm of the "Type 23"low autumn temperature, the paper establishes the harmonic pattern y_i=30.75 +3.73cos(27t_i)-4.38sin(27t_i)+2.22cos (18t_i)+4.37sin (18t_i)-1.04cos(9t_i) +4.59sin(9t_i)]on the basis of statistical analysis of the dates of the first day of the "Type 23"low autumn temperature in Fuzhou from 1951 to 1990, and analyses the changable tendency towards the first day of the "Type 23" low autumn temperature in Fuzhou and its influence on the continuous cropping late rice production according to the pattern. |
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| Keywords: | low autumn temperature harmonic analysis Fuzhou |
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