热带气旋灾情的隶属函数模型

热带气旋灾情的隶属函数模型

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Initial contribute: 2018-12-04

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岳天祥编著
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yue@lreis.ac.cn
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Application-focused categoriesNatural-perspectiveAtmospheric regions

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热带气旋灾情的隶属函数模型

 

(1)隶属函数模型:

式中,Ui(𝑥)为因素x的隶属函数;𝑎,𝑏𝑐为参数,且𝑎>0,𝑏<0,𝑐>0;在解析式中,规定数值如下:𝑏=-2𝑐=xmin,另历年最大灾情统计数据所对应的隶属度值为0.99,则有:

,即,经过多次计算,在灾前预测模型中的𝐾取值为0.4

(2)设影响热带气旋灾害的因子为n,每一个因子的评价集为:,则由n灾情因子得到的总评价矩阵为:

根据各灾情因子在成灾过程中的相对影响大小,可以建立各因子的权值分配,记为:a𝑖³0,𝑖=1,2,…,n,

(3)各热带气旋灾情的综合指数:

 

参考文献

樊琦,梁必骐:热带气旋灾情的预测及评估。自然资源学报,2000,55(supplement)

 

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《资源环境数学模型手册》 (2018). 热带气旋灾情的隶属函数模型, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/399882e3-5a99-4028-af7e-736609c3408c
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Initial contribute : 2018-12-04

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Authorship

:  
岳天祥编著
:  
yue@lreis.ac.cn
:  
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Last modifier
zhengzhong
Last modify time
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