Experiences and issues of using cellular automata for assisting urban and regional planning in China   总被引：1，自引：0，他引：1  

Xia Li  Yimin Chen  Xiaoping Liu  Xiaocong Xu  Guangliang Chen 《International journal of geographical information science》2017,31(8):1606-1629

Since the late 1990s, there are growing studies on the development of cellular automata (CA) as a simulation tool for assisting urban and regional planning in China. Rapid urban development is the main reason that this country has become one of the best places to test the methodology of CA and analyze the effectiveness of using these models. This paper attempts to summarize the experiences and issues of using CA to solve various environmental and planning problems in China. The analysis is based on the literature review using the search engines of ISI Web of Science and Google Scholar. These experiences could be important for those who want to apply CA in developing countries. For example, which environmental and ecological problems can be solved by using this bottom-up approach? What are the data inputs to these models and how can they be calibrated? Our analyses indicate that CA have the great potential to support land-use planning and policy analysis for fast-growing regions. Some specific features of using CA in China are also identified in the literature review, including delineation of urban growth boundary, prevention of illegal development and formulating zoning schemes. The CA studies in this fast-growing country provided valuable experiences for other developing countries to solve a series of simulation and planning problems by using this bottom-up approach.  相似文献   

A new tool for modeling dune field evolution based on an accessible, GUI version of the Werner dune model     

Thomas E. Barchyn  Chris H. Hugenholtz 《Geomorphology》2012,138(1):415-419

Research into aeolian dune form and dynamics has benefited from simple and abstract cellular automata computer models. Many of these models are based upon a seminal framework proposed by Werner (1995). Unfortunately, most versions of this model are not publicly available or are not provided in a format that promotes widespread use. In our view, this hinders progress in linking model simulations to empirical data (and vice versa). To this end, we introduce an accessible, graphical user interface (GUI) version of the Werner model. The novelty of this contribution is that it provides a simple interface and detailed instructions that encourage widespread use and extension of the Werner dune model for research and training purposes. By lowering barriers for researchers to develop and test hypotheses about aeolian dune and dune field patterns, this release addresses recent calls to improve access to earth surface models.  相似文献   

改进的案例推理CA模型及土地覆盖变化模拟     

张琴  张友静  张滔 《地理与地理信息科学》2012,28(3):59-62,113

对基于案例推理的元胞自动机模型(CBR-CA)进行改进,将各类别的宏观转移概率添加到目标函数中,体现各类别的转变特征,并增加时间权重来确定转移概率,实现时间尺度上的模拟;由于土地覆盖变化的多样性和空间结构的复杂性,利用Monte Carlo(M-C)法确定土地覆盖的最终转换类别。选择黄河源区为试验区,利用1977年、1985年土地覆盖数据建立原始案例库,模拟了该区域1995年、2000年和2006年的土地覆盖变化,模拟的各类别转换的数量精度与实际相吻合,各年份的总体误差分别为0.002%、0.012%和0.005%,空间位置精度总体在70%以上,并进行未来土地覆盖情景预测。该模型可用于多类别、长时间序列区域土地覆盖变化的模拟与预测。  相似文献   

石油和油分散剂对藻类胞内外有机氮的影响     

孙林枫  王兴建 《海洋科学》1990,14(3):22-25

  相似文献   

Genetic algorithms for determining the parameters of cellular automata in urban simulation   总被引：1，自引：0，他引：1  

Li Xia  Yang QingSheng  Liu XiaoPing 《中国科学D辑(英文版)》2007,50(12):1857-1866

This paper demonstrates that cellular automata(CA) can be a useful tool for analyzing the process of many geographical phenomena.There are many studies on using CA to simulate the evolution of cites.Urban dynamics is determined by many spatial variables.The contribution of each spatial variable to the simulation is quantified by its parameter or weight.Calibration procedures are usually required for obtaining a suitable set of parameters so that the realistic urban forms can be simulated.Each pa-rameter has a unique role in controlling urban morphology in the simulation.In this paper,these pa-rameters for urban simulation are determined by using empirical data.Genetic algorithms are used to search for the optimal combination of these parameters.There are spatial variations for urban dynam-ics in a large region.Distinct sets of parameters can be used to represent the unique features of urban dynamics for various subregions.A further experiment is to evaluate each set of parameters based on the theories of compact cities.It is considered that the better set of parameters can be identified ac-cording to the utility function in terms of compact development.This set of parameters can be cloned to other regions to improve overall urban morphology.The original parameters can be also modified to produce more compact urban forms for planning purposes.This approach can provide a useful ex-ploratory tool for testing various planning scenarios for urban development.  相似文献   

用于检测同相轴的Duffing型系统恢复力项的讨论   总被引：1，自引：2，他引：1       下载免费PDF全文

赵雪平  李月  杨宝俊 《地球物理学进展》2006,21(1):53-60

在用于检测同相轴的Duffing型系统中，非线性恢复力项的选取至关重要．针对具有不同非线性恢复力项的混沌系统，本文首先就非线性恢复力项的来源进行了说明，然后通过对哈密顿系统和耗散系统的仿真实验分析，以及理论推导，确定了势能—哈密顿多项式方程中可用于混沌振子检测系统的各项幂次和各项系数组合关系，即非线性恢复力项的选取规则：幂次最高项为奇次，其系数大于零．  相似文献   

Ecological footprint analysis based on RS and GIS in arid land     

CHANG Bin  XIONG Liya 《地理学报》2005,15(1):44-52

Sustainable development has become a primary objective for many countries and regions throughout the world now. The ecological footprint (EF) is a kind of concise method of quantifiably measuring the natural capital consumption and it can reflect the goal of sustainability. In this paper, the concept, the theory and method of ecological footprint are introduced. On this basis, the study brings forward the method of ecological footprint and capacity prediction. The method is employed for the ecological footprint prediction combining consumption model with population model and the technique is adopted for the ecological capacity (EC) prediction uniting the Geographical Cellular Automata (Geo CA) and Geographic Information System (GIS). The above models and methods are employed to calculate EF and EC in 1995 and 2000 and predict them in 2005 in Hexi Corridor. The result shows that EF is continually increasing, and EC ascended in the anterior 5 years and will descend in the posterior 5 years. This suit of method is of the character of accuracy and speediness.  相似文献   

地震强度分布不均匀性的摩擦时间依从CA模型   总被引：2，自引：1，他引：2  

刘桂萍  傅征祥 《地震》2001,21(2):22-28

设计一个摩擦时间依从的地震活动性细胞自动机模型（CA），研究产生地震累积频度-震级关系曲线中，出现拐点的地震强度分布不均匀现象的物理原因。外界通过应力加载向模型输入能量，模型的细胞之间存在非线性的相互作用。对比分析规定单个细胞破裂与模型地震之间不同的决定规则时产生的地震序列的累积频度-震级关系，研究结果表明，地震的级联破裂方式是引起累积频度-震级关系在震级较低范围和震级较高范围之间不连续的因素之一。  相似文献   

用算法复杂性分析时间序列   总被引：11，自引：1，他引：11  

吕悦军  陆远忠 《中国地震》1993,9(3):229-234

本文介绍了算法复杂性的概念,总结了算法复杂性的一些性质,对其所具有的优点及在计算中所存在的问题进行了讨论。通过用算法复杂性C(n)分析由地震细胞自动机模型产生的地震时间序列,说明算法复杂性用于研究地震活动演化及地震活动图象是有希望的。  相似文献   

基于生命周期理论的煤矿区 土地利用演化模拟   总被引：7，自引：0，他引：7  

王行风  汪云甲  李永峰 《地理研究》2009,28(2):379-390

准确、可靠地模拟和预测煤矿区土地利用结构的变化,是矿区制定土地利用规划、土地复垦措施的重要依据。考虑到元胞自动机模型(CA)在土地利用结构变化模拟和预测方面的优越性能,将CA模型引入了矿区土地利用结构变化的模拟和预测。但矿区在不同的发展阶段,土地利用类型之间的转换具有不同方式,使得土地利用结构的演化存在阶段性的特点。因而利用CA模型对矿区的土地利用变化进行模拟和预测,就要求在不同阶段使用不同的转换规则,而传统CA模型难以满足这样的要求。本文基于矿区生命周期理论,改进了传统CA模型,通过控制变量的引入,实现了元胞转换规则的动态获取和应用。为了验证模型的有效性,以潞安矿区为研究区域,常村矿为研究对象,利用改进的模型对常村矿的土地利用空间结构进行了成熟期和衰退期的预测。通过和传统CA模型预测结果的比较,表明该模型的预测结果和矿区的不同阶段的土地利用演化特点比较吻合。因此该模型能够提高矿区土地利用结构演变模拟和预测的精度,是有效可行的方法。  相似文献