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A three-dimensional feature extraction-based method for coal cleat characterization using X-ray μCT and its application to a Bowen Basin coal specimen

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第1期16卷 153-166页

作者： Yulai Zhang Matthew Tsang Mark Knackstedt Michael Turner shane latham Euan Macaulay Rhys Pitchers ARC Training Centre for M3D Innovation Research School of PhysicsAustralian National UniversityCanberraACT2601Australia Department of Materials Physics Research School of PhysicsAustralian National UniversityCanberraACT2601Australia Anglo American Steelmaking Coal BrisbaneQLD4000Australia SCT Operations Pty Ltd. WollongongNSW2500Australia

Cleats are the dominant micro-fracture network controlling the macro-mechanical behavior of *** understanding of the spatial characteristics of cleat networks is therefore important to the coal mining *** fracture networks(DFNs)are increasingly used in engineering analyses to spatially model fractures at various *** reliability of coal DFNs largely depends on the confidence in the input cleat *** of these parameters can be made from image-based three-dimensional(3D)characterization of coal cleats using X-ray micro-computed tomography(m CT).One key step in this process,after cleat extraction,is the separation of individual cleats,without which the cleats are a connected network and statistics for different cleat sets cannot be *** this paper,a feature extraction-based image processing method is introduced to identify and separate distinct cleat groups from 3D X-ray m CT ***(filters)representing explicit cleat features of coal are built and cleat separation is successfully achieved by convolutional operations on 3D coal *** new method is applied to a coal specimen with 80 mm in diameter and 100 mm in length acquired from an Anglo American Steelmaking Coal mine in the Bowen Basin,Queensland,*** is demonstrated that the new method produces reliable cleat separation capable of defining individual cleats and preserving 3D topology after ***-parallel fractures are also identified and separated,which has his-torically been challenging to delineate and rarely reported.A variety of cleat/fracture statistics is measured which not only can quantitatively characterize the cleat/fracture system but also can be used for DFN ***,variability and heterogeneity with respect to the core axis are *** heterogeneity is observed and suggests that the representative elementary volume(REV)of the cleat groups for engineering purposes may be a complex problem requ

关键词： Cleat separation Cleat statistics Feature extraction Discrete fracture network(DFN)modeling

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Mochi: Composing Data Services for High-Performance Computing Environments

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Journal of Computer Science & Technology 2020年第1期35卷 121-144页

作者： Robert BRoss George Amvrosiadis Philip Carns Charles DCranor Matthieu Dorier Kevin Harms Greg Ganger Garth Gibson Samuel KGutierrez Robert latham Bob Robey Dana Robinson Bradley Settlemyer Galen Shipman shane Snyder Jerome Soumagne Qing Zheng Argonne National Laboratory LemontIL 60439U.S.A Parallel Data Laboratory Carnegie Mellon UniversityPittsburghPA 15213U.S.A Vector Institute for Artificial Intelligence TorontoOntarioCanada Los Alamos National Laboratory Los Alamos NMU.S.A The HDF Group Champaign ILU.S.A

Technology enhancements and the growing breadth of application workflows running on high-performance computing(HPC)platforms drive the development of new data services that provide high performance on these new platforms,provide capable and productive interfaces and abstractions for a variety of applications,and are readily adapted when new technologies are *** Mochi framework enables composition of specialized distributed data services from a collection of connectable modules and *** than forcing all applications to use a one-size-fits-all data staging and I/O software configuration,Mochi allows each application to use a data service specialized to its needs and access *** paper introduces the Mochi framework and *** Mochi core components and microservices are *** of the application of the Mochi methodology to the development of four specialized services are ***,a performance evaluation of a Mochi core component,a Mochi microservice,and a composed service providing an object model is *** paper concludes by positioning Mochi relative to related work in the HPC space and indicating directions for future work.

关键词： storage and I/O data-intensive computing distributed services high-performance computing

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