Results 11 to 20 of about 239,109 (153)
Uniform topological spaces based on fuzzy filters in FI-algebras(FI代数上基于模糊滤子的一致拓扑空间)
Zhejiang Daxue xuebao. Lixue ban, 2018 拓扑结构是逻辑代数领域的重要研究内容之一，为了揭示FI代数上的拓扑结构，基于模糊滤子诱导的同余关系在FI代数上构造一致拓扑空间并讨论其拓扑性质，证明了 ：(i) 一致拓扑空间是非连通、局部紧的完全正则空间；(ii) 一致拓扑空间是T0空间当且仅当是T1当且仅当是T2空间；(iii) FI代数中蕴涵算子关于一致拓扑是连续的，从而构成拓扑FI代数.同时，获得了一致拓扑空间是紧空间的充分必要条件.最后，讨论了商空间的性质. 该研究对从拓扑层面进一步揭示FI代数内部特征具有一定的促进作用.
LIUChunhui(刘春辉)
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Zhejiang Daxue xuebao. Lixue ban, 2023 针对多尺度结构拓扑设计计算效率低等问题，提出了一种基于水平集渐进均匀化的多尺度拓扑优化并行算法。基于通用图形处理器（graphics processing unit ，GPU），通过水平集初始化、大型稀疏刚度矩阵方程求解以及本构矩阵并行计算，可大幅提升渐进均匀化算法的效率。实验结果表明，当三维晶胞单元网格细化至分辨率为10万时，多尺度结构拓扑优化GPU并行算法较CPU串行算法快数十倍。
夏兆辉(XIA Zhaohui) +6 more
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Guangtongxin yanjiu, 2008 文章提出一种基于弹性分组环（RPR）的新型环网拓扑结构。该结构采用环网垂直的拓扑方式,拥有较高的生存性,同时,又充分利用了RPR标准单环数据传输机制的优点,并将该优点应用到宏观的网络体系结构中,提高了网络整体的带宽利用率。
孙金星, 陈名松, 周胜源
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Zhongshan Daxue xuebao. Yixue kexue ban, 2013 【目的】 探讨海洛因成瘾患者的大脑白质结构网络的拓扑特性。【方法】 采集２０例海洛因成瘾者及１７例健康对照组的扩散张量成像和大脑高分辨率解剖结构像，利用纤维追踪技术和图论模型，构建了每个被试的大脑白质结构网络，计算大脑网络的拓扑特性。【结果】 在全局参数上，海洛因成瘾者的大脑网络的最短路径长度显著低于健康对照组，全局效率高于健康对照组（Ｐ ＜ ０．０５）；在节点参数上，海洛因成瘾者的节点效率显著增加 （Ｐ ＜ ０．０５），这些显著增加的脑区主要分布在控制系统和感觉运动系统。【结论 ...
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Matching expert range maps with species distribution model predictions
Conservation Biology, Volume 34, Issue 5, Page 1292-1304, October 2020., 2020 Abstract Species’ range maps based on expert opinion are a critical resource for conservation planning. Expert maps are usually accompanied by species descriptions that specify sources of internal range heterogeneity, such as habitat associations, but these are rarely considered when using expert maps for analyses.
Kumar Mainali +3 more
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Policy &Internet, Volume 12, Issue 2, Page 144-164, June 2020., 2020 This article examines “soft facts” about security issues in the 2016 Brexit referendum campaign. Soft facts arise when information provenance is uncertain, and are forms of malleable and contingent knowledge, such as rumors, conspiracy theories, and propaganda.
Diyana Dobreva +2 more
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Gaoya dianqi, 2023 针对轨道交通直流牵引供电系统故障短路电流大、上升速率快等问题，文中提出1 800 V阻容型限流式混合直流断路器拓扑结构，分析了工作原理和整机开断过程，确定了整机开断限流参数取值。采用MATLAB/Simulink建立阻容型限流式混合直流断路器模型，对比分析阻容限流拓扑结构与传统电感限流拓扑结构对开断故障短路电流峰值和整机开断时间的影响，阻容限流拓扑结构效果更优。搭建整机开断试验平台，进行小电流开断试验验证，试验结果表明与传统电感限流拓扑结构相比，阻容限流拓扑结构有效降低故障电流幅值30%以上 ...
范钦晓 +5 more
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Two cues of change detection: Topological strucature or brightness contrast(拓扑结构与明度对比对变化觉察的影响)
Zhejiang Daxue xuebao. Lixue ban, 2011 采用变化觉察的实验范式，通过3个实验来探查拓扑差异与明度对比度差异对视知觉的影响.实验一通过操纵不同类型的客体变化，结果表明人们对客体的空间结构和拓扑结构的变化觉察成绩显著优于对客体形状的变化觉察.实验二通过操纵客体的不同明度变化，结果表明人们对明度变化大的差异更容易觉察.在分散注意条件下，实验三的成绩虽然普遍低于实验二，但两者的整体结果模式是一致的.最后，讨论了注意在变化觉察中的作用，以及拓扑差异与明度对比的关系，进而说明拓扑结构的复杂性.
XIAQiong(夏琼) +1 more
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Kinetic‐Controlled Growth of Iron Chalcogenide Nanosheets Featuring Besnus Transition
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Two‐dimensional (2D) Fe‐based nanosheets have sparked wide attention owing to exotic magnetism, superconductivity and topological phases. However, the synthesis of 2D FemXn (X = Te/Se/S, m, n: integer), typically in a non‐stoichiometric ratio, remains challenging because of narrow thermodynamic windows.
Hongmei Zhang +11 more
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Rechargeable aluminium‐ion batteries (RAIBs) are promising candidates for sustainable energy storage owing to their low cost, safety, and resource abundance. However, the lack of durable cathode materials restricts their development. Here, we propose a topology‐guided design strategy by synthesizing three thioether‐bridged naphthoquinone ...
Jia Qiao +8 more
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