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Spark环境下并行立方体计算方法 被引量:5
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作者 萨初日拉 周国亮 +3 位作者 时磊 王刘旺 石鑫 朱永利 《计算机应用》 CSCD 北大核心 2016年第2期348-352,共5页
针对传统联机分析处理(OLAP)处理大数据时实时响应能力差的问题,研究基于分布式内存计算框架Spark加速的数据立方体计算方法,设计基于Spark内存集群的自底向上构造(BUC)算法——BUCPark,来提高BUC的并行度和大数据适应能力。在此基础上... 针对传统联机分析处理(OLAP)处理大数据时实时响应能力差的问题,研究基于分布式内存计算框架Spark加速的数据立方体计算方法,设计基于Spark内存集群的自底向上构造(BUC)算法——BUCPark,来提高BUC的并行度和大数据适应能力。在此基础上,为避免内存中迭代的立方体单元膨胀,基于内存重复利用和共享的思想设计改进的BUCPark算法——LBUCPark。实验结果表明:LBUCPark算法性能优于BUC算法和BUCPark算法,能够胜任大数据背景下的快速数据立方体计算任务。 展开更多
关键词 SPARK 联机分析处理 数据立方体 自底向上构造
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Spherical Packing Superlattices in Self-Assembly of Homogenous Soft Matter:Progresses and Potentials
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作者 Yuchu Liu Huanyu Lei +8 位作者 Qing-Yun Guo Xianyou Liu Xinghan Li Yuean Wu Weiyi Li Wei Zhang Geng Xin Liu Xiao-Yun Yan Stephen Z.D.Cheng 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2023年第5期607-620,I0005,共15页
The construction of complex superlattices using homogenous soft matter has great potential for the bottom-up fabrication of complex,nanoscale structures.This topic is not only interested in scientific exploring for ne... The construction of complex superlattices using homogenous soft matter has great potential for the bottom-up fabrication of complex,nanoscale structures.This topic is not only interested in scientific exploring for new concepts of supramolecular crystals with nanometer in sizes,which is about thousand times larger in volumes than those of normal crystals,but also practically important to provide construction principles of metamaterials which are artificially structured materials for controlling and manipulating light,sound,and other physical behaviors.These systems have fast assembly kinetics and convenient processing procedures,making them ideal for large-scale superlattice production.In this perspective,we focus on recent developments in the construction of complex spherical packing superlattices using homogenous soft self-assemblies.We discuss the general mechanism of those formations of supramolecular motifs and provide an overview of the spherical packing superlattices self-assembled by homogenous soft matters based on different volume asymmetry.Additionally,we outline the potentials of utilizing this approach in constructing novel superlattices as well as its future challenges. 展开更多
关键词 Soft matter SELF-ASSEMBLY Spherical packing phases Superlattice bottom-up construction
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