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Effects of forest fragmentation on avian breeding activity
Conservation Biology, Volume 37, Issue 4, August 2023., 2023 Abstract Biodiversity declines and ecosystem decay follow forest fragmentation; initially, abundant species may become rare or be extirpated. Underlying mechanisms behind delayed extirpation of certain species following forest fragmentation are unknown.
Charles P. J. Coddington +2 more
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People and Nature, Volume 4, Issue 5, Page 1387-1400, October 2022., 2022 Abstract The emergence of infectious diseases, such as COVID‐19, impacts livelihood strategies and conservation tools reliant on human‐wildlife interactions, such as wildlife‐based tourism and research. This is particularly relevant to great ape conservation, as humans and great apes are susceptible to being infected by similar pathogens.
Ana Nuno +7 more
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Gaoya dianqi, 2022 高压隔离开关作为电网结构中的关键变电站设备，对电网运行的质量至关重要。由于中国广东省的地理位置，近年来许多强台风对电力设施造成了极大的破坏，其中隔离开关的损耗是最严重的，这严重影响了电网的可靠性。在研究强风下隔离开关的力学特性时，隔离开关表面实际上受到连续的风压作用，因此，有必要采用流固耦合分析方法研究强风下隔离开关的风荷载和力学特性。首先采用流体动力学模型模拟隔离开关周围的风流场，以获得隔离开关表面准确的风压分布，然后将风压载荷、重力载荷和固定支撑施加在隔离开关上进行力学特性分析。结果表明 ...
庞小峰 +5 more
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Gaoya dianqi, 2021 800 kV高压交流隔离开关是我国西北电网750 kV输电线路重要的开关设备。文中在国内外高压开关设备研究的基础上,进一步对800 kV高压交流隔离开关进行理论分析研究,确定了800 kV高压交流隔离开关的技术方案及结构参数,建立了800 kV高压交流隔离开关三维模型并进行机械及绝缘特性仿真分析。研制出800 kV高压交流隔离开关样机并通过了型式试验的验证。通过仿真分析和型式试验研究得出,文中设计的800 kV高压交流隔离开关结构合理,机械特性和绝缘特性满足招标要求 ...
李宏楼 +11 more
doaj
Developmental Medicine &Child Neurology, Volume 61, Issue 3, Page E1-E35, March 2019., 2019 目的 本国际临床指南由欧洲残疾儿童学会（the European Academy of Childhood Disability，EACD）牵头制定，旨在解决发育性协调障碍（developmental coordination disorder，DCD）的定义、诊断、评估、干预以及与社会心理方面的临床应用关键问题。 方法 本指南针对五个领域的关键问题，通过文献综述和专家团队的正式讨论达成共识。为保证指南的循证基础，以“机制”、“评估”和“干预”为检索词, 对2012年更新以来提出的最新建议以及新增的“社会心理问题”和“青少年/成人”为检索词进行检索。根据牛津大学循证医学中心证据等级 (证据水平 [level of evidence, LOE]1–4) 将结果进行分类，最终转化为指南建议。并由国际 ...
Jing Hua +6 more
wiley +1 more source
Gaoya dianqi, 2022 隔离开关合闸不到位是危害电网安全运行的重要因素之一。针对目前缺乏快速有效的隔离开关合闸状态非接触自动检测技术的问题，文中以单臂水平伸缩式隔离开关为例，分析隔离开关运动过程，利用地面激光雷达获取隔离开关导电臂点云数据，对数据进行排序、分组及拟合，获得导电臂方向向量，提出了基于导电臂方向向量夹角的隔离开关合闸状态检测方法，开发了自动测量工具，并将该方法及工具运用于现场检测。现场试验结果表明，提出的检测方法及工具可实现隔离开关合闸状态的自动检测。该方法为隔离开关合闸状态的带电非接触检测提供了一种新的技术手段。
刘衍 +5 more
doaj
基于力矩与转角检测的GW4-126型隔离开关典型机械故障诊断
Gaoya dianqi, 2020 高压隔离开关是电力系统中一种重要的电力设备,而目前针对高压隔离开关机械故障的检测与诊断,尚无行之有效的检测诊断技术,为此文中开展隔离开关机械故障检测诊断技术研究。文中以某GW4-126型隔离开关为试验研究对象,在不破坏改变隔离开关原有轴系基础上提出一种隔离开关操作力矩与转角检测技术,测得隔离开关处于正常状态、轴承卡涩、三相不同期、合闸不到位等典型机械状态的操作力矩—转角曲线,对比分析得出隔离开关机械状态改变时其对应的操作力矩—转角曲线会发生相应的改变,由此提出基于操作力矩 ...
刘春来 +5 more
doaj
, 2021 800 kV AC disconnector is one of the key equipment for extra high voltage（ EHV） substation,and the balance spring is an important component to reduce external load and improve equipment reliability.Aiming at 800 kV EHV disconnector,the mechanism ...
刘本学 +7 more
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International Journal of Urban and Regional Research, Volume 50, Issue 1, Page 191-220, January 2026.Abstract Henry George advocated for capturing land value increases for public ends. The active approach of public authorities organizing and financing land development can help capture higher land value increases, as Hartman and Spit indicate. However, this approach hardly happens in developing countries, where the coalition of private developers and ...
Nannan Xu
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Research on Auxiliary Power System Scheme for Offshore Converter Station [PDF]
[Introduction] Aiming at the characteristics of offshore converter station, this paper proposes the design scheme for auxiliary power system of offshore converter station.
Sheng LIU, Zeyong LIANG, Zikai LU
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