Results 51 to 60 of about 8,037 (116)
Gaoya dianqi, 2018 文中以特高压直流输电线路保护为对象,分析了国内外实际工程应用中继电保护技术和原理存在的问题。行波保护作为现有特高压直流线路的主保护优势明显,但存在耐过渡电阻能力有限、对采样频率要求高等问题。微分欠压保护作为行波保护的冗余保护,缺点类似行波保护,同时缺乏整定依据等。低电压保护在耐过渡电阻能力方面较强,但其选择性较差,动作速度不够快。电流纵差保护选择性好,但由于受到线路分布电容的影响且动作时间长。文中通过梳理当前特高压直流输电线路继电保护技术进展以及存在的问题,并提出利用边界元件、特征频率 ...
李振兴 +4 more
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Conservation Biology, EarlyView.Abstract Modeling species distributions in dynamic pelagic environments remains challenging, particularly for wide‐ranging and highly mobile species when there is limited guidance on model performance. This limitation constrains the effective use of species distribution models (SDMs) in marine conservation, where robust and transferable predictions are
E. Pasanisi +32 more
wiley +1 more source
野生动物学报, 2009 通过对嘟噜河湿地自然保护区鸟类资源的调查,发现鸟类126种,隶属16目,31科,其中国家I级保护鸟类2种,国家Ⅱ级保护鸟类20种,以及黑龙江省省级保护鸟类16种。在分析嘟噜河湿地自然保护区鸟类分布特征及活动规律基础上,探讨了嘟噜河湿地自然保护区鸟类资源的威胁因素,提出了相应的保护措施。
曾昭文, 李海军
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Conservation Biology, EarlyView.Abstract The International Union for Conservation of Nature (IUCN) Red List of Threatened Species is a critical measure of global aquatic and terrestrial biodiversity status. It is also the basis for the Red List Index, which tracks extinction risk over time.
Brittany Finucci +10 more
wiley +1 more source
野生动物学报, 2010 2008年6月,对广东大峡谷自然保护区社区公众野生动物保护意识进行了问卷调查。结果表明:（1）公众对野生动物保护知识匮乏,缺乏野生动物保护法制意识;（2）公众普遍对野生动物面临的威胁有较明确的认识,具有保护意愿,但缺乏保护野生动物的积极性和主动性;（3）公众接受野生动物保护教育的主要途径是电视。本文针对广东大峡谷自然保护区公众野生动物保护意识现状及其存在的问题,提出了一些建议。
潘岽生 +5 more
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Structured decision‐making as a framework to incorporate social equity into conservation decisions
Conservation Biology, EarlyView.Abstract Many conservation challenges require negotiating trade‐offs between the needs of different actors. Global frameworks such as the Kunming–Montreal Global Biodiversity Framework explicitly call for diverse participation and social equity in conservation decision‐making.
Emily Massingham +2 more
wiley +1 more source
野生动物学报, 1988 国务院最近向各省、自治省、直辖市人民政府和国务院各部委、各直属机构发出通知,公布了第二批国家级森林和野生动物类型自然保护区名单如下:雾灵山自然保护区（河北省）;历山自然保护区（山西省）;大青沟自然保护区（内蒙古自治区）;白石砬子自然保护区（辽宁省）;双台河口自然保护区（辽宁省）;丰林自然保护区（黑龙江省）;呼中自然保护区（黑龙江省）;古牛绛自然保护区（安徽省）;梅花山自然保护区（福建省 ...
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Comprehensive and representative conservation planning for biodiversity of ice‐free Antarctica
Conservation Biology, EarlyView.Abstract Antarctica is designated as a natural reserve devoted to peace and science, with Antarctic Specially Protected Areas (ASPAs) serving as the primary instrument for area‐based biodiversity protection. However, the existing ASPA network lacks the comprehensiveness and representativeness required under Annex V, Article 3(2), of the Madrid Protocol.
Wen Wen +3 more
wiley +1 more source
Guangtongxin yanjiu, 2007 针对弹性分组环（Resilient Packet Ring,RPR）技术中的源路由和环回两种保护倒换机制的不足,文章提出了一种新型保护倒换机制———源节点保护倒换,并对这种保护倒换机制的性能进行了分析。源节点保护倒换克服了源路由保护倒换存在的严重的丢包现象,避免了包失序问题,同时减小了环回保护倒换产生的较大时延和不必要的带宽浪费,充分提高了RPR中保护倒换的性能。
赵永利, 曹淼, 张杰, 顾畹仪
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Conservation Biology, EarlyView.Abstract Qualitative approaches are increasingly applied in conservation social science, yet methodological reflection remains limited. Member checking, a process of returning findings to participants for feedback, is widely recognized outside conservation as a means to enhance rigor and reciprocity, but it is rarely reported in conservation research ...
Judith J. Rakowski +6 more
wiley +1 more source