用随机漫步模型拟合39个贝塔世界城市1901～1998年的降水量(英文)

Fitting of Precipitation in 39 Beta World Cities from 1901 to 1998 Using Random Walk Model

用随机漫步模型拟合1901年至1998年39个贝塔世界城市的年降水量。先将每个城市的降水量转换为降水漫步和随机降水,再用随机漫步模型分别对转换数据和实际数据进行拟合。结果显示,该模型能够拟合降水漫步和实际降水,为降水建模提供了一种模型,表明此期间这些城市的降水呈现随机变化。

The random walk model was used to fit the annual precipitation in 39 beta world cities from 1901 to 1998.At first,the recorded precipitation of each city was converted to precipitation walk and random precipitation,then the random walk model was used to fit the converted data and recorded ones.The results show that this model can fit both precipitation walk and recorded precipitation.Thus this study provides a model to describe the precipitation patterns,and suggests the random mechanism may underline in the precipitation change of these cities during this period.