Interpretation of coal compositional data on whole-coal versus ash bases through the weighted symmetric pivot coordinates method
Xu, Na (China University of Mining and Technology (Beijing). College of Geoscience and Survey Engineering)
Wang, Ru (China University of Mining and Technology (Beijing). College of Geoscience and Survey Engineering)
Engle, Mark A. (University of Texas at El Paso. Department of Earth, Environmental and Resource Sciences)
Zhu, Wei (China University of Mining and Technology (Beijing). College of Geoscience and Survey Engineering)
Li, Qiang (China University of Mining and Technology (Beijing). College of Geoscience and Survey Engineering)
Wang, Zhiwei (China University of Mining and Technology (Beijing). College of Geoscience and Survey Engineering)

Date:	2023
Abstract:	In addition to approaches based on a number of physical and chemical analyses, statistical methods have been commonly used for determining the modes of occurrence of elements in coal. The Pearson correlation coefficient of element concentrations vs. ash yields is the simplest method that has been widely used. Concentrations of elements in coal are usually reported on two bases: whole-coal and ash bases. Coal compositional data on whole-coal basis can be converted back to ash basis. However, in many cases, the correlation between corresponding pairs of elements in coal is inconsistent when reported on whole-coal versus ash bases. Therefore, traditional statistical methods, such as correlation analysis, based on whole-coal and ash bases can sometimes lead to misleading or confusing results. Previous investigations have suggested using logratio variance or related parameters (i. e. , stability) to examine these data, as they provide consistent results regardless of the sample basis. However, logratio variance based approaches are unable to distinguish the inverse relationships between parts. To provide more clarity on the relationships between parts, weighted symmetric pivot coordinates are used to analyze the correlation between elements in coal on whole-coal basis and ash basis. To illustrate this approach, 106 late Paleozoic coal samples from the Datanhao and Adaohai coal mines, Daqingshan Coalfeld, northern China, are used for performance evaluation. Experimental results show that the weight symmetric pivots method is more effective than the stability method in predicting the modes of occurrence of elements in coal for these samples, providing deeper insight than logratio variance based approaches.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Whole-coal basis ; Ash basis ; Correlation ; WSPC method
Published in:	SORT : statistics and operations research transactions, Vol. 47 Núm. 2 (2023) , p. 345-362, ISSN 2013-8830

Adreça original: https://raco.cat/index.php/SORT/article/view/421921
DOI: 10.57645/20.8080.02.12

18 p, 2.2 MB

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