Results 31 to 40 of about 4,998 (131)
Spectacled flying‐fox Pteropus conspicillatus populations have declined so seriously over two decades that they are now endangered. Inaction has allowed threats to increase. Extreme heat events are now a lethal reality, habitat loss continues almost unabated, and pressure to disperse roosts is ever‐present. Obtaining resources and taking action to help
Noel Preece
wiley +1 more source
为实现建筑和工业废弃物的再利用,采用镍铁渣部分替代水泥、再生粗骨料替代天然骨料制备镍铁渣再生混凝土(RFC)。进一步,将RFC填入圆钢管中形成钢管掺镍铁渣再生混凝土(RFCFST)柱。对11根RFCFST柱进行水平低周往复抗震性能试验。试验变量包括再生骨料替换率、轴压比、约束水平和剪跨比。试验结果表明,RFCFST柱的破坏模式与传统钢管混凝土柱相似。P-Δ效应会显著降低柱的抗侧能力和变形能力,尤其是在高轴压比和高剪跨比情况。骨料取代率对RFCFST柱的承载力、变形能力和耗能能力几乎无影响 ...
付朝江 +4 more
core +2 more sources
Our study addresses the significant knowledge gap regarding the wintering population and habitat utilization of the Yellow‐breasted Bunting (Emberiza aureola) in Nepal, providing crucial insights that can aid in the conservation of this critically endangered species in wintering grounds.
Hem Bahadur Katuwal +6 more
wiley +1 more source
确定连接硬管母线滑动金具的恢复力特性参数及考虑刚度的软母线位形函数是建立互联特高压电气设备抗震有限元模型关键因素。文中通过拟静力试验确定了管母线滑动金具的起滑力、起滑刚度、附加阻尼比等恢复力参数;同时通过对软母线的受力分析,推导了考虑刚度的软母线位形函数;从而在此基础上建立了互联特高压设备的抗震有限元模型。有限元分析结果表明:互联特高压电气设备计算结果与试验结果非常接近,从而验证了该有限元模型的正确性。文中的研究成果为建立互联特高压电气设备有限元模型提供了一定的理论及试验依据。
张雪松, 卢智成, 朱祝兵
doaj
Amazonian conservation across archipelagos of Indigenous territories
Abstract Indigenous stewardship is essential to the conservation of biocultural diversity, yet conventional conservation models often treat Indigenous territories (ITs) as homogeneous or isolated units. We propose that archipelagos of Indigenous territories (AITs), clusters of ITs that span geographies but are connected through shared cultural or ...
Michael S. Esbach +3 more
wiley +1 more source
Climate change is widely recognized as a major threat to biodiversity and a critical factor contributing to the decline of species and populations. The study investigates the differential impacts of climate change on endangered continental and island specie.
Ling Hu +9 more
wiley +1 more source
Biosphere reserves aim to protect global biodiversity alongside social and economic development. In the Cape Floristic Region, biosphere reserves are an effective conservation approach to protect arthropods against habitat transformation in this biodiverse region.
Michael J. Samways +3 more
wiley +1 more source
Freshwater biodiversity in China is threatened by multiple anthropogenic factors, and while there are some reasons to suppose it may be possible to bend the curve of biodiversity loss, the variety of threats and their likely interactions with ongoing climate change provide little basis for optimism. For example, the historic overexploitation of Yangtze
David Dudgeon
wiley +1 more source
基于双肢短剪切型耗能段、形状记忆合金(SMA)棒材的超弹性和碟形弹簧的恢复力,提出一种自复位双肢剪切型耗能段,可有效提高中心支撑结构的抗震性能和震后功能恢复能力。采用校正的有限元法对自复位双肢剪切型耗能段力学性能进行分析,研究其滞回性能和破坏模式;随后对考虑SMA棒材直径和碟形弹簧刚度的十个模型进行参数化分析。结果表明:自复位双肢剪切型耗能段具有良好的承载能力和自复位能力,以及较小的残余变形。拉力作用下,SMA棒材受拉且碟形弹簧静止;压力作用下,SMA棒材静止且碟形弹簧受压 ...
朱剑波 +4 more
doaj +2 more sources
M̓ṇúxvʔit model for centering Indigenous knowledge and governance
Abstract The importance of Indigenous (and local) knowledge and governance systems for addressing social and ecological crises is increasingly recognized. Unfortunately, attempts to incorporate Indigenous knowledge into Western approaches, often without the full leadership, consent, and participation of the peoples holding those knowledges, can cause ...
Elroy White (Q̓íx̌itasu) +5 more
wiley +1 more source

