Results 31 to 40 of about 21,616 (149)
Gaoya dianqi, 2016 高压开关是电力系统中起控制与保护作用的关键设备,液压操动机构是高压开关的驱动部件,直接影响到开关的动作性能。分析液压操动机构常用的阶梯型缓冲结构的工作原理,建立相应的数学模型,在此基础上对缓冲特性进行计算与分析。最后对缓冲特性进行优化,并通过可靠性试验验证优化前后的效果,从而为提高高压开关可靠性提供一种思路。
王亚辉 +4 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
Dianci bileiqi, 1995 带脱离装置ＭＯＡ的研究与开发（续）闫中华（苏州电瓷厂苏州２１５００７）（上接《电瓷避雷器》１９９５年第３期第９页）６热熔式脱离装置（动作）安秒特性试验方法的研究脱离装置（动作）安秒特性是脱离装置最重要的特性。以前，热熔式脱离装置使用得很少，ＩＥＣ、一...
闫中华
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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
Guangtongxin yanjiu, 1990 本文探讨数字光纤中继系统中的抖动积累问题,具体分析谐振槽路（RC）作定时提取时的抖动积累特性,并给出适于工程估算抖动积累特性的简化公式。
杨铸
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Dianci bileiqi, 2021 受电容器充放电时间常数、电磁式机械翻牌动作时间的限制,以及放电电流的波形差异的影响,实际运行放电计数器存在不可靠动作的问题,尤其是难以记录多重雷击作用下的动作情况,给过电压分析、避雷器动作状态的评估带来困难。因此,笔者在分析传统放电计数器动作特性基础上,提出改进计数器动作特性的脉冲电流提取方法,设计了相应的脉冲电流测量线圈和信号提取电子电路,实测了信号测量线圈和电子电路的准确性。试验证明,该电流提取线圈能可靠还原冲击电流陡波、标准雷电波和操作波电流波形,误差小于0.2 ...
安志国 +6 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, 2001 本文从真空断路器的动作特性出发 ,讨论了真空断路器各种机构的特点以及与真空断路器动作特性的匹配情况 ,提出了一种真空断路器用新型的永磁机构 ,并从原理上论述了该机构具有可靠性高、零部件少、免维护等优点 ,同时 ...
游一民, 郑军, 罗文科
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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