| 基于Bayes网络的多粒度时空对象地理过程演化建模——以新安江模型为例 |
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| 引用本文： | 张正方,闫振军,王增杰,傅蓉,罗文,俞肇元.基于Bayes网络的多粒度时空对象地理过程演化建模——以新安江模型为例[J].地球信息科学,2021,23(1):124-133. |
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| 作者姓名： | 张正方 闫振军 王增杰 傅蓉 罗文 俞肇元 |
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| 作者单位： | 1.南京师范大学 虚拟地理环境教育部重点实验室,南京 2100232.江苏省地理环境演化国家重点实验室培育建设点,南京 2100233.江苏省地理信息资源开发与利用协同创新中心,南京 210023 |
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| 基金项目： | 国家重点研发计划项目课题;国家自然科学基金项目 |
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| 摘 要： | 多粒度时空对象具有多粒度、多类型、多形态、多参照系、多元关联、多维动态、多能自主特点,可用于直接描述从微观到宏观的现实世界。基于时空对象建模理论构建多尺度地理对象耦合演化的集成表达是多粒度时空对象模型支撑地理分析与建模的关键。本文基于多粒度时空对象建模理论,在概率图和条件概率表的基础上发展了一种基于Bayes网络的地理过程演化表达和建模方法。该方法将多粒度时空对象作为Bayes网络节点,根据多粒度时空对象间的关联关系构建Bayes网络,利用Bayes概率表达多粒度时空对象间关联关系的作用强度,并通过更新算子和概率图模型描述要素特征状态的动态变化。基于此方法,选取新安江模型,进行多粒度时空对象地理过程建模和模拟实验。采用呈村1989—1995年水文数据为训练数据,1996年水文数据为模拟数据,通过降水面、蒸发面、产流面和汇流面构造Bayes网络并模拟产流量和汇流量状态;实验结果表明本文方法不仅可以对水文过程进行演化建模,并且可以较好地模拟水文过程中的产流量和汇流量变化,正确率达97.5%和95.9%。
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| 关 键 词： | 多粒度时空对象 多尺度地理对象耦合演化 地理过程 Bayes网络 关联关系 概率图模型 要素特征状态 新安江模型 |
| 收稿时间： | 2020-07-31 |
Modeling of Geographical Process Evolution of Spatio-temporal Objects of Multi-granularity based on Bayesian Network:A Case Study of the Xin'an Jiang Model |
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| ZHANG Zhengfang,YAN Zhenjun,WANG Zengjie,FU Rong,LUO Wen,YU Zhaoyuan.Modeling of Geographical Process Evolution of Spatio-temporal Objects of Multi-granularity based on Bayesian Network:A Case Study of the Xin'an Jiang Model[J].Geo-information Science,2021,23(1):124-133. |
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| Authors: | ZHANG Zhengfang YAN Zhenjun WANG Zengjie FU Rong LUO Wen YU Zhaoyuan |
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| Institution: | 1. Key Laboratory of Virtual Geographic Environment of The Ministry of Education (Nanjing Normal University), Nanjing 210023, China2. Cultivation Base of State Key Laboratory of Geographical Environment Evolution, Jiangsu Province, Nanjing 210023, China3. Jiangsu Provincial Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China |
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| Abstract: | Spatio-temporal objects of multi-granularity have the characteristics of multi-granularity, multi-type,multi-form, multi-reference system, multi-relation, multi-dimensional dynamics, and multi-energy autonomy. It can be used to directly describe the real world from micro to macro. Based on the spatio-temporal objects modeling theory, constructing the integrated expression of the coupled evolution of multi-scale geographic objects is the key to supporting geographic analysis and modeling with spatio-temporal objects of multigranularity model. Based on spatio-temporal objects of multi-granularity modeling theory, this paper develops a Bayesian network-based geographic process evolution expression and modeling method on the basis of probability diagrams and conditional probability tables. This method uses spatio-temporal objects of multigranularity as Bayesian network nodes, and constructs Bayesian network according to the association relationship between spatio-temporal objects of multi-granularity. It uses Bayesian probability to express the strength of the relationship between spatio-temporal objects of multi-granularity. And it describes the dynamic changes of the feature state of the elements through the update operator and the probability graph model. Based on this method, the Xin’anjiang Model is selected to conduct the modeling and simulation experiment of the geographic process of spatio-temporal objects of multi-granularity. This paper uses the hydrological data of Chengcun Village from 1989 to 1995 as training data, and the hydrological data of 1996 as simulated data. Using precipitation surface, evaporation surface, runoff surface and confluence surface to construct Bayesian network and simulate the state of runoff and sink flow. The experimental results show that the method can not only model the evolution of hydrological process, but also can simulate the changes of runoff and sink flow in the hydrological process, and the correct rate can reach 97.5% and 95.9%. |
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| Keywords: | spatio-temporal objects of multi-granularity the coupled evolution of multi-scale geographic objects geographic process bayesian network connection relation probabilistic graphical model feature state of the elements the Xin’an jiang Model |
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