Results 21 to 30 of about 6,281 (117)
IET Collaborative Intelligent Manufacturing, Volume 6, Issue 4, December 2024.Domain‐adaptation‐based named entity recognition with information enrichment is proposed for developing an equipment fault knowledge graph. A question answering application of the equipment fault knowledge graph is proposed. Abstract Numerous files, such as records and logs, are generated in the process of equipment diagnosis and maintenance (D&M ...
Dengrui Xiong +3 more
wiley +1 more source
Adivasi (Tea Tribe) worldviews of living close to wild Asian elephants in Assam, India
Conservation Biology, Volume 38, Issue 6, December 2024.Abstract In Assam state, northeastern India, human–elephant conflict mitigation has included technocentric measures, such as installation of barriers, alternative livelihoods, and afforestation. Such measures treat conflict as a technical problem with linear cause–effect relations and are usually ineffective over the long term because they do not ...
Sayan Banerjee +2 more
wiley +1 more source
SVIT‐SSR: A sEMG‐based vision transformer approach for silent speech recognition
Electronics Letters, Volume 60, Issue 21, November 2024.The silent speech recognition (SSR) task based on surface electromyography is abstracted into a short‐term image sequence classification task and the SVIT‐SSR model based on the vision transformer (VIT) framework for silent speech recognition is proposed.
Zhao Li +5 more
wiley +1 more source
Integrative Conservation, Volume 3, Issue 2, Page 87-103, June 2024.Some extinctions can be prevented if impediments to protection of threatened species are overcome. Policies and practices have failed endangered species and biodiversity conservation is fraught with impediments such as rhetorical adoption, policy dismantling, circumvention of legislative obligations, and deliberate ignorance of scientific evidence ...
Noel Preece +2 more
wiley +1 more source
Gaoya dianqi, 2015 目前对气体绝缘金属封闭开关（gas insulated switchgear,GIS）的故障研究大多集中在故障诊断与故障识别的层面上,缺乏对故障的系统研究。文中在分析研究大量GIS故障案例的基础上,从机械故障与绝缘故障两方面入手建立GIS故障树,并对GIS故障树进行定性与定量分析。通过对GIS故障树的定性分析发现制造与安装不当是引起GIS故障的主要原因,并且绝大多数故障是可控的。而对GIS故障树的定量分析主要针对常见绝缘缺陷的重要度研究。通过对GIS故障树的分析研究,为提高GIS可靠性 ...
崔杨柳 +7 more
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Gaoya dianqi, 2011 可控开断故障电流能有效提高断路器的开断能力和延长其电寿命。断路器可控开断多相故障电流的关键是快速、可靠识别故障类型和故障相。笔者采用相关分析法获得特殊相的正、负序故障分量的相位关系,从而根据相位关系快速、可靠实现确定故障类型和相应故障相;采用MATLAB建立高压断路器开断故障电流模型,对提出的故障选相算法的性能进行了测试验证。测试结果表明,提出算法能够在故障发生后半个周期内准确识别出特定条件下的故障类型和故障相,为同步断路器可控开断故障电流实现提供了理论依据和实现基础。
母秀清 +4 more
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Dianci bileiqi, 2018 针对广东韶关电网近年来深受鸟害故障影响,根据2003-2016年韶关电网输电线路跳闸故障情况,重点统计分析了鸟害故障数据。统计分析发现:该地区电网年均鸟害故障发生率为9.13%,鸟害故障已成为仅次于雷击灾害的输电线路跳闸第二大原因。研究表明:该地区鸟巢故障占比46.67%成为鸟害故障的首要故障类型,鸟害故障主要集中在110 kV和220 kV输电线路,发生在6-8时的鸟害故障占比26.67%,发生在3-7月份的鸟害故障占比70%。研究结果可为输电线路运行维护中的鸟害防治工作提供借鉴和参考。
唐子峰 +5 more
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Gaoya dianqi, 2021 文中研究了混合三端直流输电系统的直流故障特性及故障电流抑制策略。此系统送端为电网换相换流器(line commutated converter)、受端为混合型模块化多电平换流器(hybrid modular multilevel converter)。首先介绍了混合三端直流输电系统拓扑以及控制策略,随后针对不同故障点,不同过渡电阻以及不同故障类型的直流侧线路故障特性进行了仿真分析。同时,分析了直流故障下混合三端直流系统中混合型MMC故障过电流的产生机理 ...
韩伟 +8 more
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Gaoya dianqi, 2003 电力设备的故障诊断可以看成一个模式分类问题,每一个电力设备故障对应一组特征集。笔者提出了根据电力设备故障案例的故障状况和故障的相关检测参数,建立故障诊断决策表（即“知识库”）,并以决策表为主要工具,采用粗糙集理论方法,直接从故障样本集中导出诊断规则,为电力设备提供有效的故障诊断。采用这一方法,在通过信息网络实现远程诊断等过程中,在用户所获取的故障参数信息数据不完备的情况下,有可能为电力设备故障诊断服务提供一条新途径。
董立新 +3 more
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Gaoya dianqi, 2022 长距离海缆存在行波信号严重衰减的问题，与陆上电缆相比缺乏可靠的故障监测手段。为了及时发现海缆线路故障，基于海缆首端护层电流的实时测量数据，提出一种针对海缆两端直接接地系统的故障在线监测与诊断方法。通过建立海缆护层等效电路模型，分析海缆护层接头开路、线芯接地短路和相间短路等3类典型故障，阐明首端护层电流在线监测的基本原理。对不同类型的海缆故障进行仿真分析，获取首端护层电流的幅值及相位特征，以不同护层回路故障电流和正常电流幅值与相位的比值构造特征参数，建立故障判定依据并进行故障诊断 ...
任乐朋 +3 more
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