Results 21 to 30 of about 2,543 (118)
Assessing the Corn Belt as an anthropogenic barrier to migrating landbirds in the United States
Conservation Biology, Volume 39, Issue 5, October 2025.Abstract Migrating landbirds adjust their flight and stopover behaviors to efficiently cross inhospitable geographies, such as the Gulf of Mexico and the Sahara Desert. In addition to these natural barriers, birds may increasingly encounter anthropogenic barriers created by large‐scale changes in land use. One such barrier could be the Corn Belt in the
Fengyi Guo +7 more
wiley +1 more source
Dianci bileiqi, 2017 以暴露距离作为计算手段的电气几何模型存在雷电入射方向固定以及难以适用于输电线路小保护角等缺点。为此,改进雷电入射方式,将雷电入射方向扩大至[-p/2,p/2],并推导出不同雷电入射角下的暴露距离计算方法。以输电线路小保护角为例,传统方法与改进方法计算得到的绕击跳闸率分别为0.021 7、0.088 1次/（100 km·a）,对造成差异的原因从雷电入射概率和暴露距离两方面进行分析。分析表明,改进方法雷电入射概率为57.33%,小于传统模型;但其暴露距离在5.0 m左右波动,大于传统模型的1.35 m ...
龚磊, 郭恒
doaj
On the normative roles of biodiversity and naturalness in conservation
Conservation Biology, Volume 39, Issue 5, October 2025.Abstract Nature is an opaque concept. Consequently, the term biodiversity conservation has replaced nature conservation in most conservation contexts. We review the conceptual indeterminacies that plague the terms nature and natural but then show that comparable difficulties plague biodiversity.
David Saltz, Shlomo Cohen
wiley +1 more source
A global indicator of species recovery
Conservation Biology, Volume 39, Issue 5, October 2025.Abstract Monitoring progress toward meeting global biodiversity goals involves several indicators, including, at the species level, the International Union for Conservation of Nature (IUCN) Red List Index (RLI) and the Living Planet Index (LPI). However, at present, there is no indicator specifically for tracking species recovery, despite this being ...
H. Resit Akçakaya +4 more
wiley +1 more source
500kV避雷器保护距离试验及对热备用断路器距离保护效果分析
Dianci bileiqi, 2015 首次开展了对500 kV避雷器保护距离的模拟试验,得出了避雷器对被保护设备的保护效果随保护距离的增大而减小的结论,并根据试验结果拟合了关系曲线。同时,考虑到变电站或换流站遭受多次雷击后受避雷器保护的断路器处于热备用状态的情况,进行了断路器热备用状态下避雷器对其保护范围的计算分析,并选取地处雷电频繁区贵州的兴仁换流站为例,仿真分析了当站内交流侧被保护断路器处于热备用状态下,不同雷击下避雷器对其的保护范围及保护效果,得出了避雷器保护范围受不同因素影响的具体情况。
邱慧敏
doaj
Integrative Conservation, Volume 4, Issue 3, Page 277-286, September 2025.This study provides an innovation to address the challenge in accessibility to samples and genetic markers in Snow leopard conservation genetic studies. We performed next‐generation sequencing (NGS) on 19 fecal samples obtained from the eastern Qinghai‐Tibet Plateau, and successfully assembled 17 complete mitogenome sequences (~16,720 bp) and ...
Chen Cheng +7 more
wiley +1 more source
Dianci bileiqi, 2018 针对电涌保护器（SPD）动作时可能对负载电压起到抑制作用而导致SPD无法达到预期的有效性保护的问题,本文通过混合波发生器模拟雷电流,对负载分别为阻性、容性时,特性阻抗值相同、长度不同的RVVP电缆做冲击试验,研究负载与RVVP电缆特性阻抗匹配关系及波电缆中的折射反射现象,分析不同长度RVVP电缆与不同特性负载的关系。得出当负载为阻性时,电涌保护器的有效保护距离与电阻值呈负相关;当负载为容性时,电涌保护器的有效保护距离与电容值呈正相关。
李顺昕, 朱正甲, 李岩峰
doaj
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 +4 more
wiley +1 more source
Dianci bileiqi, 2018 配电线路遭受雷击后,沿线路侵入的雷电浪涌十分容易导致变压器低压侧负载设备的损坏,有必要对此防护进行研究。利用PSCAD软件搭建配电系统模型,采用高频变压器模型与IEEE氧化锌压敏电阻模型,分析变压器低压侧负载性质对负载端过电压的影响,讨论不同负载下变压器低压侧电涌保护器对应的有效保护距离。分析结果表明:负载端过电压波形存在明显的振荡,阻性负载端过电压衰减较快,感性负载和容性负载端过电压持续时间较长。阻性负载或感性负载幅值较小时,负载端过电压随着SPD与负载间连接电缆长度的增加而减小;阻性负载幅值较大时 ...
杨剑锋 +4 more
doaj
Religious uses shape the selection and distribution of Chinese Buddhist tree species
People and Nature, Volume 7, Issue 9, Page 2094-2105, September 2025.Abstract As a widely disseminated world religion, Buddhism's selection of religious species may profoundly impact candidate species distribution. This study sampled 246 Chinese temples covering diverse regions to investigate the selection modes of Buddhist tree species (BTS) and the alien religion's influence on Chinese indigenous biodiversity and ...
Cheng Jin +8 more
wiley +1 more source