1) simulating method of phenological cumulative frequency
物候累积频率拟合法
1.
Methods We developed a simulating method of phenological cumulative frequency to determine the seasonal aspect stages of plant communities.
该文利用物候累积频率拟合法对我国东部温带地区7个站点1982~1996年的植物群落季相阶段进行划分,并分析了植物群落季相的空间差异和年际变化及其与气候因子的关系。
2) phenological cumulative frequency modeling
物候累积频率拟合
1.
Phenological observation data of plant communities from 1982 to 1996 at 5 sites and a method for phenological cumulative frequency modeling were used to determine the beginning dates of local phenological seasons and their corresponding threshold values of normalized difference vegetation index(NDVI) in each year.
利用1982～1996年5个站点的植物群落物候观测数据和物候累积频率拟合法,划分各站逐年的植被物候季节,并确定各季节初日对应的当地归一化差值植被指数(NDVI)阈值。
3) Cumulative frequency method
累积频率法
4) low-water cumulative frequency method
低水累积频率法
6) cumulative frequency
累积频率
1.
By use of the 1961-2005 daily mean temperature station data over China and the cumulative frequency distribution(CFD),the extremely high(low) temperature thresholds on four different time scales,day,pentad,month and season,are defined by the 90th(10th) percentiles of the CFD.
利用1961-2005年45 a中国日平均温度的站点资料和累积频率的统计方法,确定了以90%(10%)累积频率为标准的日、旬、月和季四种不同时间尺度的极端高(低)温事件的阈值。
2.
By use of the threshold value of the cumulative frequency and 10 years daily precipitation results simulated by Community Climate Model 3(CCM3),the spatial distribution characteristics of the summer extreme precipitation events are analyzed.
采用累积频率的统计方法和Community Climate Model 3(CCM3)模拟的10年逐日降水结果,分析了模拟的夏季极端降水事件的时空分布特征。
补充资料：累积频率
分子式：
CAS号：
性质：在一组依大小顺序排列的测量值中，当按一定的组距将其分组时出现在测量值小于某个数值的频率。
CAS号：
性质：在一组依大小顺序排列的测量值中，当按一定的组距将其分组时出现在测量值小于某个数值的频率。
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参考词条