Results 21 to 30 of about 25,884 (166)
Dianci bileiqi, 1986 本文叙述了RXQ型电压互感器消谐器的保护原理。此消谐器既能消除中性点不接地系统中由电压互感器(PT)的非线性励磁特性所引起的过电压,又能抑制由弧光接地所引起的流过PT的过电流,进而防止了PT的烧毁。文中提出了与经典理论不同的谐振范围曲线,论证了消谐器的参数与技术要求,介绍了运行情况,并与国内数种消谐器作了有关比较。
1.西北电力试验研究所 +2 more
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The Feasibility Study on the Municipal Solid Waste Incineration Slag as Fine Aggregate of Concrete [PDF]
, 2016 随着城镇化的快速推进和人民生产、生活的发展，大量增加的生活垃圾已成为全国一个比较严重的社会问题。发达国家的发展历程表明，通过焚烧可使垃圾减量80%～85%，减容约90%，但仍将残留总重约10%～20%的焚烧炉渣，大部分炉渣进入填埋场进行填埋处置，这将显著增加城市周边填埋库容的压力，占用大量的土地。 与此同时，大规模的城镇化和基础设施建设对于混凝土的需求量稳定增长，混凝土用砂数量巨大，加上砂浆和其他用途，估计每年全国需要30亿吨以上建设用砂。随着对砂子的不断开采，全国天然河砂资源趋于枯竭。福州、厦门 ...
张世相
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When and why to give shorebirds a head start
Conservation Biology, EarlyView.Abstract Headstarting is a translocation technique involving the hatching or rearing of wild eggs or young in captivity and the release of those individuals back to the wild at or before independence. It has been trialed as a conservation intervention for shorebirds over recent decades to improve the population trend of target populations by increasing
Lynda Donaldson +4 more
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, 2012 到目前为止,已有大量文献介绍了各类绝缘子的人工污秽试验结果,少有文献涉及交直流人工污秽试验电源的特性试验研究。特高压交直流污秽试验电源电压高,电源特性实现难度大,因此需要对电源特性进行试验研究,探索交直流污秽电源的参数特性及其规律。昆明特高压实验室污秽实验室开展了一系列特高压交直流污秽电源的特性试验研究。研究成果一方面为人工污秽试验的理论研究和工程应用提供依据,同时为待建或已建交直流污秽试验电源的特性试验研究提供参考。文中说明了污秽交直流试验电源的工作原理和性能要求 ...
丁薇 +4 more
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Research of the instrument for measuring the grinding index of the grinding index based on single chip microcomputer [PDF]
, 2017 本文基于单片机设计了一款哈氏可磨性指数测定仪。主要对哈氏可磨性指数测定仪的测量原理进行了介绍，在此基础上，对整个硬件系统进行了完成的方案设计．硬件系统包括人机界面卡和控制板卡，并对其中的重要模块给出了设计原理图。产品完成设计后，进行了软硬件调试和样机装配，达到设计要求。Based on single chip microcomputer, this paper designs a measuring instrument for the.
陈定昭
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Using incentive payments to promote human–carnivore coexistence
Conservation Biology, EarlyView.Abstract For many large carnivores, minimizing the financial burden they impose on local people is critical to their conservation. Incentive‐based programs that provide people with financial benefits for taking pro‐conservation actions or achieving conservation goals are a promising tool for promoting human–carnivore coexistence. Although the number of
Adam Pekor +9 more
wiley +1 more source
Gaoya dianqi, 2012 针对±800 kV换流阀多重阀绝缘试验因试验回路尺寸大、试验电压高等造成试验实施难度很大的问题,笔者通过采用等效模拟负载模拟部分阀段,试验研究了±800 kV换流阀多重阀的直流电压试验技术、雷电冲击试验技术、操作冲击试验技术。研究表明,此种试验方法是可行的。
张小勇 +7 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
Dianci bileiqi, 1984 1984年5月,我们利用在西德参加IECTC36、SC36B、SC36C的机会,参观了一个研究所和三个电瓷厂,现简介如下,以供同行参考.一、高压大容量输变电研究所（FGH）该研究所位于西德的Mannheim.它重点研究交直流输变电,有大电流试验室、高压试验室、电工试验室、绝缘子部 ...
蔡国材, 周义华
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