Results 21 to 30 of about 22,057 (141)
Gaoya dianqi, 2017 文中采用建模和仿真方法对安装于某水电厂的某一带气动操动机构的330 kV GIS断路器分、合闸操作异常振动问题展开研究。首先,建立了带气动操动机构断路器的运动模型,仿真分析了其操作时的振动特性及气动机构工作气压变化对振动特性的影响。然后,又对带液压操动机构断路器操作时的振动特性展开了建模和仿真分析。部分仿真结果也与试验结果进行了对比,能够较好吻合。通过对带两种不同操动机构断路器振动特性仿真结果的对比发现:液压操动机构断路器的振动强度比气动机构的要小,而且液压机构断路器振动强度的衰减速度更快 ...
杨鼎革 +6 more
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Conservation Biology, EarlyView.Abstract Recognition and engagement of Indigenous Peoples and local communities (IP&LCs) and other traditional knowledge (TK) holders in formal biodiversity governance remain limited, despite their significant contribution to the conservation and sustainable use of biodiversity through their knowledge, innovations, practices, and land stewardship.
Kinga Öllerer +8 more
wiley +1 more source
Conservation Biology, EarlyView.Abstract In the western United States, conservation practitioners are increasingly working with private landowners to restore habitat for North American beavers (Castor canadensis) and to use nonlethal mitigation techniques when beavers damage crops and infrastructure.
Brian D. Erickson, Megan S. Jones
wiley +1 more source
Effects of political identity activation and inaccurate metaperceptions on attitudes toward wolves
Conservation Biology, EarlyView.Abstract Polarization between groups can undermine durable conservation outcomes. Activating group identities (i.e., an individual's sense of self derived from membership in a group) can exacerbate differences, especially when people hold inaccurate perceptions of their peers and rivals.
Alexander L. Metcalf, Justin W. Angle
wiley +1 more source
Gaoya dianqi, 2019 针对现阶段调度自动化系统对断路器运行参数关注不够这一现象,对调度自动化系统中有关断路器运行参数进行了深度挖掘。引入了断路器动作时间特性修正参数△t和保护装置出口延时t延时,并对断路器动作时间特性修正参数△t和保护装置出口延时t延时的稳定性进行了评估。通过引入断路器动作时间特性修正参数和保护装置出口延时,提出了基于调度自动化系统的断路器动作时间特性模型。通过大量试验验证表明基于该模型的断路器分、合闸时间服从于正态分布。最后,制定了某型号高压126 kV SF6断路器和中压真空断路器的状态评估策略 ...
刘少辉 +5 more
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Evaluating the empirical basis for threat attribution in the IUCN Red List
Conservation Biology, EarlyView.Abstract Understanding the impacts of different threats on species is key to successful conservation interventions and policies. The International Union for Conservation of Nature (IUCN) assesses threats to species, and the organization's Red List of Threatened Species is a key conservation tool.
Ena Humphries +5 more
wiley +1 more source
Gaoya dianqi, 2003 根据高压断路器分闸运动原理,建立了高压断路器液压机构与压气室的联合运动方程。通过仿真,分析了运动方程中各种力参数对分闸运动特性的影响和操作功特性,并且从理论上提出了调节分闸运动特性的两种途径。
孙弋 +4 more
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Conservation Biology, EarlyView.Abstract The design of experiments to investigate the combined effects of multiple stressors requires exposing target organisms to multiple combinations of stressor doses. Concurrent manipulation of stressors is often infeasible with wildlife, but long‐lasting health effects allow individual health to be used as an integrator of prior stressor exposure.
Enrico Pirotta +24 more
wiley +1 more source
野生动物学报, 2010 概述了自动照相系统的工作原理,介绍了该技术在国内外野生动物调查中的现状,同时还结合作者近几年的研究体会,分析了自动照相系统用于野生动物调查时的特点和存在问题及今后发展的趋势。作者认为,这项技术虽仍有不足,但由于自动照相系统所具有的客观性、隐蔽性、非损伤性及监测的长期性等特点,将来会在野生动物调查中具有非常重要的应用价值和可观的应用前景。
封托, 王静, 张洪峰, 吴晓民
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Conservation Biology, EarlyView.Abstract Achieving global conservation policy goals requires the ability to set and measure progress toward science‐based targets for biodiversity. The species threat abatement and restoration (STAR) metric was developed to enable actors to set science‐based targets for species.
Louise Mair +17 more
wiley +1 more source