Results 21 to 30 of about 4,998 (131)
Disaster Cross‐Sector Collaboration Networks: Evidence from Four Historical Disasters
Risk, Hazards &Crisis in Public Policy, Volume 17, Issue 1, March 2026.ABSTRACT By conducting content analysis and social network analysis of media coverage of four historical disasters (i.e., the 2011 Joplin Tornado, 2013 Moore Tornado, 2017 Hurricane Harvey, and the 2023 Maui wildfire), this study uncovered characteristics of cross‐sector disaster collaboration networks.
Xiaochen Angela Zhang, Jonathan Borden
wiley +1 more source
Shuitu Baochi Xuebao, 2023 为揭示造林20年后不同石漠化恢复模式对土壤结构和理化性质的影响,以滇中地区7种恢复模式下样地土壤为研究对象,研究不同石漠化恢复模式下土壤理化性质分布特征并进行多指标聚类分析。结果表明:除油杉林外,其他样地土壤养分等级均为中高级;土壤颗粒组成较为合理,分形程度较好,抵抗侵蚀的能力较强;不同恢复类型对石漠化土壤的改良存在明显不同,混交林明显优于纯林;由于受土壤母质、地形以及水文等因素的影响,相同恢复类型间存在差异,华山松林和油杉林总体较差;研究区土壤可蚀性因子K值与粉粒含量呈正向变化特征 ...
张叶飞 +3 more
doaj
Non- linear analysis on the performance of buckling restrained brace concrete school building [PDF]
, 2013 本文以一个中小学校舍抗震加固设计的实际工程为例,研究的目的是分析防屈曲支撑的滞回曲线,采用非线性时程分析的方法,简单介绍防屈曲约束支撑在MIdAS软件中非线性时程分析的应用过程,得到防屈曲支撑的滞回曲线与试验的滞回曲线相吻合。Taking an actual school building's seismic design as an example,The purpose of the study is the analysis of buckling- restrained brace ...
姚林利, 张树传, 李强
core
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Porous NiTi alloys are widely used in biomedical and engineering fields. Using the PBF‐LB technique, the TPMS and Voronoi porous parts with a porosity of ∼67% and a minimum feature size of 0.15 ± 0.02 mm were fabricated. Although the bulk sample fabricated with the same parameters is defect‐free, μ‐CT reconstruction on the porous sample ...
Wen‐Hao Zeng +7 more
wiley +1 more source
Shuitu Baochi Xuebao, 2022 水文恢复力是流域或生态系统维持水文稳定性的重要参考指标,深入研究植被结构和水文恢复力之间的关系是未来在全球变化背景下生态水文学的重要方向。但目前水文恢复力对气候变化与人类活动等不同干扰方式的响应机制还缺乏系统的研究,水文恢复力的形成机制及其与植被结构的关系也尚无全面的认识。系统总结了当前水文恢复力的主要概念,从水分利用效率、Budyko框架的水平衡、植被景观结构变化与受到干旱干扰的恢复时间等不同角度总结了5种主要的算法,分析了气候变化 ...
孙美荣 +3 more
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EXPERIMENTAL STUDY ON THE TIME-DEPENDENTBEHAVIOR of SHORT STEEL-REINFORCED CONCRETE COLUMNS UNDER SUSTAINED AXIAL LOADING [PDF]
, 2015 钢骨混凝土柱结构在过去几十年间已得到广泛的运用。但是目前关于这种柱结构在长期荷载作用下由于徐变和收缩引起的与时间相关的力学性能研究还开展得很少。该文开展了钢骨混凝土短柱的长期轴向荷载试验研究,还进行了这些柱的极限承载力破坏试验。试验监测了由徐变和收缩引起的柱的轴向长期变形。基于该实测曲线的分析表明,采用ACI 209r-92的收缩模型和CEb-fIP90的徐变模型,利用龄期调整有效模量法可以较好地模拟钢骨混凝土柱在长期轴向荷载作用下的变形发展。经历了长期加载后的试验柱的极限承载力破坏试验还表明 ...
代堂珍 +4 more
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Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Dielectric ceramics are popular for energy storage materials because of their rapid charge–discharge characteristics, whereas their low energy density and efficiency hinder their miniaturization and integration. In this work, the energy storage performance is significantly enhanced through introducing Al2O3 and TiO2 into the 0.425(Bi0.5Na0.5 ...
Qiansi Zhang +9 more
wiley +1 more source
Analysis on the Elastic Lateral Stiffness under Seismic Action for Palace Structure in the Building Standards of Song Dynasty [PDF]
, 2015 中国古代木构架房屋具有良好的抗震性能，其中凝结了长达数千年间古代的建筑工程经验与智慧。这种“干架”结构有别于现代刚接杆系结构，其结构受力分析尚不能直接套用现代框架结构计算方法。已有的研究，通过缩尺模型试验，回归分析，拟合出类似于现代钢筋混凝土框架结构的动力学方程，尚未能揭示出符合古代设计思想及技术水平的基本原理。从古代房屋结构的设计、建造方法入手，探寻其本源的科学原理，一方面可以为古代建筑的安全性能评价找到一般性的方法，另一方面，古为今用，可以为现代工程建设带来新的启迪。 本文在深入研读《营造法式 ...
黄燕萍
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Effects of landscape fragmentation on floodplain fishes as revealed by species–habitat networks
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract How species interact with habitat patches is influenced primarily by habitat configuration (e.g., connectivity) and species’ functional traits. As levels of fragmentation increase, identifying the intricate connections between these components is crucial for biodiversity conservation.
Chen Zhang +8 more
wiley +1 more source
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Articular cartilage regeneration remains a significant challenge because of its limited intrinsic healing capacity and the inadequacy of conventional treatments for restoring structural and functional integrity. In this study, a novel injectable composite hydrogel scaffold was designed to mimic the extracellular matrix (ECM) of native ...
Zhong‐Lian Wu +13 more
wiley +1 more source