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首页> 外文期刊>Hydrology and Earth System Sciences >Exploratory data analysis and clustering of multivariate spatial hydrogeological data by means of GEO3DSOM, a variant of Kohonen's Self-Organizing Map
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Exploratory data analysis and clustering of multivariate spatial hydrogeological data by means of GEO3DSOM, a variant of Kohonen's Self-Organizing Map

机译:利用Kohonen自组织图的一种变体GEO3DSOM进行探索性数据分析和多元空间水文地质数据的聚类

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The use of unsupervised artificial neural network techniques likethe self-organizing map (SOM) algorithm has proven to be a usefultool in exploratory data analysis and clustering of multivariatedata sets. In this study a variant of the SOM-algorithm is proposed,the GEO3DSOM, capable of explicitly incorporating three-dimensionalspatial knowledge into the algorithm. The performance of theGEO3DSOM is compared to the performance of the standard SOM inanalyzing an artificial data set and a hydrochemical data set. Thehydrochemical data set consists of 131 groundwater samples collectedin two detritic, phreatic, Cenozoic aquifers in Central Belgium.Both techniques succeed very well in providing more insight in thegroundwater quality data set, visualizing the relationships betweenvariables, highlighting the main differences between groups ofsamples and pointing out anomalous wells and well screens. TheGEO3DSOM however has the advantage to provide an increasedresolution while still maintaining a good generalization of the dataset.
机译:无监督人工神经网络技术(如自组织映射(SOM)算法)的使用已被证明是探索性数据分析和多元数据集聚的有用工具。在这项研究中,提出了一种SOM算法的变体GEO3DSOM,它能够将三维空间知识明确地整合到算法中。将GEO3DSOM的性能与标准SOM的性能进行比较,分析了人工数据集和水化学数据集。水化学数据集由在比利时中部的两个碎屑,潜水,新生代含水层中收集的131个地下水样品组成,这两种技术均能很好地提供对地下水质量数据集的更多见解,可视化变量之间的关系,突出显示各组样品之间的主要差异并指出异常井和筛网。但是,GEO3DSOM的优点是可以提供更高的分辨率,同时仍然可以很好地概括数据集。

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