Results 11 to 20 of about 6,291 (116)
野生动物学报, 2015 野生动物栖息地是生物多样性保护的研究热点之一,也是国家和地区生态安全及生态管理的关注对象。本文突破了传统意义上只注重野生动物自然分布单一角度的研究模式,探讨从野生动物资源自然分布和城市管理双维度分析城市野生动物栖息地的分布现状,寻找“自然生态与城市管理”的耦合点,以上海市为例分析城市野生动物栖息地的分布、类型、特点、保护管理现状及面临的问题。本研究在分析野生动物栖息地基础上,查阅相关文献及材料,结合上海的实际情况,提出了适合高度城市化地区的野生动物栖息地保护模式,具体包括自然保护区保护模式 ...
张秩通 张恩迪
doaj
Integrative Conservation, EarlyView.This study investigates distribution patterns of Galliforms in the Indian Himalayas, focusing on factors influencing their occurrence, regions of high diversity and endemism, and their overlap with protected areas. Our study highlights the need for assemblage‐level conservation strategies in high Himalaya which primarily relies on snow leopard‐focused ...
Manvi Sharma +5 more
wiley +1 more source
Gaoya dianqi, 2004 给出了一种基于重合次数最少、快速隔离故障段线路的10kV配电网线路保护模式,即最少拍环网控制系统模式。该模式适用于绝大多数带辐射分支的环网控制系统,具有开关动作次数最少、对线路的冲击最小、快速隔离故障段线路、自动恢复非故障段线路供电的优点。分析了即使在三相“完全”短路,某控制器检测失误时最少拍的保护过程,提出了最少拍环网供电模式的一组参考参数,叙述了电压型保护模式和电流型保护模式的故障隔离过程,指出了其优点和不足。
程福雁, 李永伟, 安平
doaj
Impacts of Human Development on Wildlife Use of Corridors in Botswana 人类开发对博茨瓦纳野生动物廊道利用的影响
Integrative Conservation, EarlyView.This study examined the effect of landscape‐scale human impact on wildlife in Botswana. We examined how species use wildlife corridors in two different human‐dominated landscapes. We identified differences in temporal overlap between wildlife and humans across both landscapes, which is fundamental to consider in both current and future conservation ...
Tempe S. F. Adams +3 more
wiley +1 more source
Dianci bileiqi, 2013 为了研究限压型低压电涌保护器级间能量配合的保护方式,参考IEEE工作组提出的MOV冲击等效电路模型,利用EMTP电磁暂态仿真软件来模拟在8/20μs、10/350μs两种冲击电流波作用下两级SPD最有效的配合保护方式。仿真结果得出在8/20μs冲击电流波作用下采用高-低配合的方式,而在10/350μs冲击电流波作用下采用低-高配合的方式是最为合理的。为敏感电子设备的防雷保护提供了参考依据。
段振中, 柴健, 朱传林
doaj
Justice in coexistence: Pastoralism and large carnivores on the Qinghai‐Tibet Plateau
People and Nature, EarlyView.Abstract The conflict between livestock husbandry and large carnivore conservation presents significant challenges in grassland ecosystems worldwide. Achieving sustainable coexistence among herders, livestock and large carnivores requires reconciling diverse perspectives and interests through equitable, inclusive and fair processes that address both ...
Yufang Gao, Yue Yu
wiley +1 more source
Dianci bileiqi, 2017 为了有效利用电涌保护器对低压配电系统进行雷电过电压防护,需要对电涌保护器保护模式进行研究。利用EMTP软件搭建1.2/50-8/20μs组合波和0.5μs-100k Hz标准振荡波发生电路,同时采用IEEE氧化锌压敏电阻模型进行仿真冲击。分析TN-C-S配电系统中不同电涌保护器保护模式的防护效果。最后讨论电涌保护器接地电阻阻值对线间电位差影响。仿真结果表明:仅在L线与N线或L线与PE线间安装SPD,不能够有效保护负载设备;在L线与N线、N线与PE线间安装SPD或三线间均安装SPD时,防护效果较好 ...
杨泽江
doaj
Wildlife Letters, EarlyView.Asiatic black bears in Russia face conservation threats such as habitat destruction and fragmentation, which exacerbate food shortages caused by crop failures. This study explores an innovative approach to rehabilitating bears that abandon hibernation in mid‐winter due to extreme exhaustion by providing supplemental food near their den sites.
Sergey A. Kolchin +2 more
wiley +1 more source
Lessons learned from screening potential other effective area‐based conservation measures
Conservation Biology, EarlyView.Abstract Other effective area‐based conservation measures (OECMs) are sites that deliver effective biodiversity outcomes irrespective of their management objectives. These areas are widely expected to play an important role in efforts to protect 30% of Earth by 2030.
Carly N. Cook +15 more
wiley +1 more source
Conservation Biology, EarlyView.Scaling area‐based conservation, including initiatives led or comanaged by Indigenous Peoples and local communities, is a flagship goal of the Kunming‐Montreal Global Biodiversity Framework. Conservationists often aspire to scale initiatives, but this is rarely achieved in practice. Identifying and addressing factors that limit initiative adoption (i.e.
Thomas Pienkowski +39 more
wiley +1 more source