Understanding the combined impacts of aggregation and spatial non-stationarity: The case of migration-environment associations in rural South Africa.

IF 0.9 4区 计算机科学 Q4 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Design Automation for Embedded Systems Pub Date : 2015-12-01 Epub Date: 2015-02-27 DOI:10.1111/tgis.12134
Galen Maclaurin, Stefan Leyk, Lori M Hunter
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了解聚合和空间非稳态的综合影响:南非农村人口迁移与环境关系的案例。
社会人口统计数据通常是在不同的汇总水平上收集的,这导致了可修改的面积单位问题。变量间统计关联的空间非平稳性进一步影响人口统计分析。本研究在迁移-环境关联的背景下调查了这两种现象的含义。使用来自南非农村的家庭调查数据,全球和地方统计模型适合于不断增加的汇总水平。我们提出了操作规模敏感性的问题,它描述了某些变量的解释能力如何取决于聚合水平。我们发现,随着分析单位(家庭)的聚合,一些变量在全局模型中变得不显著,而另一些变量对聚合不那么敏感。局部模型结果表明,聚集减少了与迁移相关的局部关联的空间差异,但对变量的影响也不同。空间非平稳性似乎是这一现象背后的驱动力,因为全球模式的结果掩盖了这种关系。操作尺度敏感性似乎与非聚合变量的潜在空间自相关性有关,但也与变量的构造方式有关。理解操作尺度的敏感性有助于改进选择与分析尺度相关的变量的过程,并更好地理解空间非平稳性对统计关系的影响。
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来源期刊
Design Automation for Embedded Systems
Design Automation for Embedded Systems 工程技术-计算机:软件工程
CiteScore
2.60
自引率
0.00%
发文量
10
审稿时长
>12 weeks
期刊介绍: Embedded (electronic) systems have become the electronic engines of modern consumer and industrial devices, from automobiles to satellites, from washing machines to high-definition TVs, and from cellular phones to complete base stations. These embedded systems encompass a variety of hardware and software components which implement a wide range of functions including digital, analog and RF parts. Although embedded systems have been designed for decades, the systematic design of such systems with well defined methodologies, automation tools and technologies has gained attention primarily in the last decade. Advances in silicon technology and increasingly demanding applications have significantly expanded the scope and complexity of embedded systems. These systems are only now becoming possible due to advances in methodologies, tools, architectures and design techniques. Design Automation for Embedded Systems is a multidisciplinary journal which addresses the systematic design of embedded systems, focusing primarily on tools, methodologies and architectures for embedded systems, including HW/SW co-design, simulation and modeling approaches, synthesis techniques, architectures and design exploration, among others. Design Automation for Embedded Systems offers a forum for scientist and engineers to report on their latest works on algorithms, tools, architectures, case studies and real design examples related to embedded systems hardware and software. Design Automation for Embedded Systems is an innovative journal which distinguishes itself by welcoming high-quality papers on the methodology, tools, architectures and design of electronic embedded systems, leading to a true multidisciplinary system design journal.
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