农业生态气候系统的模糊动态模型

农业生态气候系统的模糊动态模型

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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 categoriesHuman-perspectiveEconomic activities
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农业生态气候系统的模糊动态模型

                 

                 

式中,为气候要素的适宜度模糊子集;为模糊子集Sr的隶属函数;Sr为气候要素rS的隶属度。

1.      如果农业生态气候动态过程的模糊向量表示为:

         

式中,分别代表气温、相对湿度和日照适宜态。由此便可以给出一组农业生态气候适宜度模型。可以是连续过程,也可以是离散过程。

(1) 资源模型:

  连续过程:

      

  离散过程:

      

资源模型代表热、水、光组合过程对生物生长可能提供的气候资源。

(2) 效能模型:

 连续过程:

     

 离散模型:

     

效能模型反映热、水、光的匹配程度及其对作物生长的适宜度。

(3) 结构模型:

  连续过程:

     

离散过程:

 

2.      根据资源模型和效能模型,可用实测的多年平均气候资料推求农业生态气候资源指数Cr、效能指数Ce和利用系数K

(1) 资源指数:

               

(2) 效能指数:

               

(3) 利用系数:

       

参考文献:

    白永平:西北地区(甘宁青)农业生态气候资源量化与评价。自然资源学报,2000,153

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《资源环境数学模型手册》 (2018). 农业生态气候系统的模糊动态模型, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/df36b170-b849-4a95-950a-bf34861bd2ed
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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
wzh
Last modify time
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