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Settlement and deformation monitoring and spatio-temporal data interpolation method for urban ultra long subway tunnels under soft soil foundation [PDF]
: [Objective] Precise monitoring of settlement and convergence deformation in urban subway tunnels is crucial for ensuring operational safety and the stability of the surrounding environment.
Han, Chenxi +2 more
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Methods in Ecology and Evolution, Volume 17, Issue 4, Page 1143-1160, April 2026.Abstract DNA barcode‐based species identification has become pivotal in biodiversity research. Current barcoding‐based deep learning methods have advantages in species identification but exhibit significant limitations. By using COI barcoding alone, previous studies were unable to fully capture species identification features. Prior methods showed that
Bin Ye +4 more
wiley +1 more source
Politics &Policy, Volume 54, Issue 2, April 2026.ABSTRACT The Great Depression was a turning point in the development of social programming in North America. This paper explores the politics of social policy expansion during the Great Depression in the United States and Canada through an analytical lens that combines the insights of historical institutionalism and the analysis of transnational ...
Daniel Béland +2 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan大跨度钢结构空间造型丰富，施工阶段结构的传力路径与最不利受力位置动态变化。为解决施工过程结构分析与安全复核时建模计算流程繁琐的问题，基于AutoCAD与ANSYS软件开发了大跨度钢结构一键式建模、计算与结果读取的插件。该插件采用C#语言调用AutoCAD. NET框架，读取并输出大跨度钢结构图纸文件中的模型信息，自动生成结构有限元建模、计算与结果读取的APDL命令流，可用于大跨度钢结构施工过程的数值模拟与安全评估。以某单层球面网壳结构为例验证了所开发的大跨度钢结构建模分析插件的有效性 ...
胡鹏华 +6 more
doaj +2 more sources
Jianzhu Gangjiegou Jinzhan大跨度异形空间网架结构在大型公共建筑项目中广泛应用，但该类结构存在大量球形构件，传统全站仪监测的测量精度和效率较低，因此提出一种基于激光点云的大跨度异形空间网架球节点中心点坐标高效自动检测方法。利用三维激光扫描仪获取结构成形态的钢结构屋盖点云数据，然后对点云进行降噪处理，基于深化设计模型并根据后续工序的精度要求设置空间域，提取目标点云，最后采用编程算法对焊接球节点的中心点坐标实现自动化批量提取。为验证拟合球体中心点精度，对比了深化设计模型球节点与点云重构球节点的半径 ...
童宇超 +5 more
doaj +2 more sources
Jianzhu Gangjiegou Jinzhan, 2018 采用基于有限元理论开发的ANSYS软件建立了张弦梁数值分析模型,按温度增量法对其火灾历程中的力学反应进行分析。讨论了在升温历程中,温度场非均匀性、荷载比、垂跨比、火源半径、火源位置以及支座约束对张弦梁上弦钢梁及下弦预应力索力学特征的影响以及跨中挠度的变化历程。得出以下结论:随着温度分布非均匀性的减小,在升温历程中,上弦钢梁强度应力历程下降速率增大,而稳定应力呈先增加后下降趋势,下弦索应力变化很小;随着荷载比增大,结构临界温度降低,结构跨中挠度增长速率也变大;随着垂跨比的增大,结构受火失效截面位置发生改变,
张浩, 杜咏, 盛红梅, 王惠蕾
doaj
, 2015 通常情况下,钢琴常作为独奏乐器与伴奏乐器出现在舞台上。伴奏又常以声乐伴奏较多,而独奏专用钢琴与伴奏专用钢琴的调律要求和调律方法是不一样的,因为钢琴独奏而调的音律不太适合用于声乐伴奏;为声乐伴奏而调的钢琴同样不适合钢琴独奏。因此,文章指出,要做到尽可能让使用者称心如意,就必须根据不同专业、不同使用者而调律 ...
黄灵智
core
How Changing Narratives About the Future Shape Policymaking for the Long Term
European Policy Analysis, Volume 12, Issue 2, Spring 2026.ABSTRACT How can we explain decisions by governments to engage in policy investments—accepting short‐term costs in return for anticipated gains in the longer term—after previously sustaining the status quo? Our article examines the role of narratives in changing expectations about the future as a key driver of intertemporal policymaking. In light of an
Pieter Tuytens, Charlotte Haberstroh
wiley +1 more source
Dianci bileiqi, 2021 安全性评估在架空线路建设过程中是不可或缺的,而跨步电压作为安全性指标显得尤为重要。为此研究了配电线路直埋式水泥杆遭受雷击时的暂态接地特性:首先通过ATP-EMTP电磁暂态软件搭建配电线路仿真计算模型,计算不同幅值的雷电流雷击杆塔时的入地电流;其次结合两种跨步电压安全限值判据,通过CDEGS软件搭建接地仿真计算模型,计算不同入地电流及土壤电阻率情况下配电杆塔周围的跨步电压及安全距离,得到如下变化规律:1)杆塔附近跨步电压随雷电流增大而增大,且在不同土壤电阻率下增加的程度不同。2)雷电流较小的情况下 ...
刘致君 +4 more
doaj
[[alternative]]Vibration Control of Flutter and Buffeting of Long-Span Bridges [PDF]
計畫編號：NSC89-2211-E032-003研究期間：199908~200007研究經費：216,000[[sponsorship ...
吳重成
core