Results 21 to 30 of about 275 (124)

Effects of Shifting Cultivation on the Western Hoolock Gibbon (Hoolock hoolock) in Western Myanmar 刀耕火种对缅甸西部西部白眉长臂猿 (Hoolock hoolock) 的影响摘要

Integrative Conservation, Volume 4, Issue 3, Page 503-513, September 2025.
Fire occurrence increased with proximity to roads and villages, indicating that human access and activity are major drivers of fire risk. We analyzed spatial patterns of fire in relation to human settlements. Our findings highlight the need for fire management strategies that consider accessibility and human presence in conservation planning.
Aung Lin, Dusit Ngoprasert, Ngwe Lwin, Niti Sukumal, Tommaso Savini   +4 more
wiley   +1 more source

How Many Floods Have Occurred in China in the Past Decade? A Perspective From Social Media

Earth's Future, Volume 13, Issue 4, April 2025.
Abstract Global climate change has led to frequent and widespread flood disasters in China. Traditional flood disaster investigations mainly focus on major flood events, and small‐scale flood events are often overlooked. This study utilized the Sina Weibo social media platform to detect flood events in 370 cities in China from 2012 to 2023.
D. Shen, H. Gu, W. Chen, C. Zhang, S. Xiao, S. Zhang   +5 more
wiley   +1 more source

Expert assessment of illegal collecting impacts on Venus flytraps and priorities for research on illegal trade

Conservation Biology, Volume 38, Issue 5, October 2024.
Abstract Illegal collecting of wild Venus flytraps (Dionaea muscipula) for the horticultural trade represents a persistent threat to populations of the species across their endemic range in the coastal plain of North and South Carolina (United States). Although wild collecting of Venus flytraps is not a novel threat, there has been very little research
Jared D. Margulies, Benjamin Trost, Laura Hamon, Natalie Z. Kerr, Michael Kunz, John L. Randall, Roger D. Shew, Dale M. Shew, Lesley Starke, Dale Suiter, Zachary West   +10 more
wiley   +1 more source

The tensions of crowdsourcing disaster response in disaster‐specific Facebook groups after the Camp Fire 营地火灾后灾害专用脸书群组中出现的众包复原力组织紧张关系 Las tensiones de la resiliencia del crowdsourcing en grupos de facebook específicos para desastres después del incendio del campamento

Risk, Hazards &Crisis in Public Policy, Volume 15, Issue 2, Page 261-283, June 2024.
Abstract Disaster‐specific Facebook groups (DSFGs) are Facebook groups devoted to a specific disaster or set of disasters. I argue DSFGs offer opportunities for disaster response and resilience organizing that can mitigate the limitations of institutionalized disaster response and illustrate the benefits and detriments of the use of DSFGs by survivors ...
Bailey C. Benedict
wiley   +1 more source

Experimentally testing animal responses to prescribed fire size and severity

Conservation Biology, Volume 38, Issue 3, June 2024.
Abstract Deserts are often highly biodiverse and provide important habitats for many threatened species. Fire is a dominant disturbance in deserts, and prescribed burning is increasingly being used by conservation managers and Indigenous peoples to mitigate the damaging effects of climate change, invasive plants, and land‐use change. The size, severity,
Tim S. Doherty, Daniel F. Bohórquez Fandiño, Darcy J. Watchorn, Sarah M. Legge, Chris R. Dickman   +4 more
wiley   +1 more source

Local perceptions of anthropogenic and climate factors affecting the use and the conservation of Detarium microcarpum and Detarium senegalense in Burkina Faso (West Africa) 当地人对影响布基纳法索（西非）Detarium microcarpum（小果甘豆）和Detarium senegalense（甘豆）的使用和保护的人为因素和气候因素的看法

Integrative Conservation, Volume 3, Issue 1, Page 58-75, March 2024.
Local populations are aware of the decline and disappearance of Detarium species in their habitats, attributing this trend to excessive human exploitation and the effects of climate change. Thus, Detarium plant resources may face challenges in forests with different levels of protection status due to habitat fragmentation and the effects of climate ...
Adama Taonda, Issouf Zerbo, Anny Estelle N'Guessan, Justin N'Dja Kassi, Adjima Thiombiano   +4 more
wiley   +1 more source

高温下轴心受压高强Q690钢柱的局部稳定

Jianzhu Gangjiegou Jinzhan, 2021
现行《建筑钢结构防火技术规范》(GB 51249—2017)未给出火灾下钢结构的局部稳定设计方法,为了获得轴心受压焊接H形高强Q690钢柱高温下的局部稳定性能,考虑钢材高温下力学性能退化、截面高温下焊接残余应力降低及初始几何缺陷,采用ABAQUS软件建立经试验验证的高温局部稳定分析有限元模型,得到焊接H形高强Q690钢柱在不同温度下的局部屈曲应力和极限应力。研究表明:当温度低于550℃时,钢柱在高温下和常温下屈曲应力具有相同的变化趋势;高温下的残余应力值和初始几何缺陷对屈曲应力有较大的影响 ...
李翔, 王卫永, 于克强
doaj  

局部火灾下基于数值方法的张弦梁力学特征参数分析

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  

拉索防火涂层对预应力组合梁抗火性能的影响

Jianzhu Gangjiegou Jinzhan, 2021
采用有限元软件ABAQUS建立了用于模拟预应力组合梁在火灾下全过程受力行为的模型,研究拉索防火涂层对预应力连续组合梁抗火性能的影响。考察组合梁跨中挠度、拉索应力及塑性应变随温度的变化,分析了预应力组合梁在高温下的温度变化和破坏模式。结果表明:钢梁下翼缘与腹板升温较快,二者温差很小,而腹板与上翼缘的温差较大;混凝土截面各测点处升温速率由下至上依次降低,上表面与下表面的最高温度差可达约700℃;当拉索有5 mm厚防火涂层时,在升温前期其温度随时间延长而上升的幅度比无防火层时温度上升的幅度要小,同一升温时间下,
周焕廷, 张苏鹏, 郑志远, 秦晗, 伍先兴, 陈志华   +5 more
doaj  

带有残余应力的钢梁内嵌式预应力组合梁抗火性能研究

Jianzhu Gangjiegou Jinzhan, 2023
为研究残余应力对钢梁内嵌式的预应力简支组合梁在火灾效应下的受力性能的影响，通过ABAQUS软件建立钢梁内嵌式的预应力简支钢-混组合梁几何非线性和材料非线性的有限元模型，利用热力-耦合法计算组合梁在高温下的结构响应行为。通过对梁的截面温度、整体挠度和跨中挠度、跨中截面应力分布、拉索应力和塑性变形、梁的整体曲率和跨中曲率等特性在高温下的结构响应进行考察，探究工程应用中常见初始残余应力对组合梁的影响机理。结果表明：残余应力主要是通过影响钢梁的截面模量，进而对钢梁的截面抗弯刚度产生影响 ...
刘雨晨, 郑志远
doaj