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Computational Intelligence and Neuroscience, Volume 2022, Issue 1, 2022., 2022 Accidents of various types in the construction of hydropower engineering projects occur frequently, which leads to significant numbers of casualties and economic losses. Identifying and eliminating near misses are a significant means of preventing accidents.
Shu Chen +4 more
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Modal Parameter Identification of Low Frequency Oscillation in Power System Based on Ambient Data [PDF]
, 2022 Low frequency oscillation is one of the key problem affecting the safe and stable operation of interconnected power system, variational modal decomposition (VMD) was used to extract low-frequency oscillation signals from ambient data, and a method of low-
GAO Yanfeng, HWANG Jin Kwon, YAN Hongyan
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Developmental Medicine &Child Neurology, Volume 61, Issue 3, Page E1-E35, March 2019., 2019 目的 本国际临床指南由欧洲残疾儿童学会（the European Academy of Childhood Disability，EACD）牵头制定，旨在解决发育性协调障碍（developmental coordination disorder，DCD）的定义、诊断、评估、干预以及与社会心理方面的临床应用关键问题。 方法 本指南针对五个领域的关键问题，通过文献综述和专家团队的正式讨论达成共识。为保证指南的循证基础，以“机制”、“评估”和“干预”为检索词, 对2012年更新以来提出的最新建议以及新增的“社会心理问题”和“青少年/成人”为检索词进行检索。根据牛津大学循证医学中心证据等级 (证据水平 [level of evidence, LOE]1–4) 将结果进行分类，最终转化为指南建议。并由国际 ...
Jing Hua +6 more
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Gaoya dianqi, 2021 电力设备绝缘裂化常常伴随着局部放电,如何提高电力变压器局部放电的检测精度对于研究其绝缘状态具有重要意义。集合经验模态分解法(ensemble empirical mode decomposition,EEMD)在局部放电的去噪过程中得到良好的应用,然而对于如何准确的选取EEMD分解过程中的固有模式函数(intrinsic modefunctions,IMFs),还原局部放电真实信号是关键。针对这一问题,文中提出一种基于相关系数的EEMD电力变压器局部放电去噪方法。该方法基于两路同时采集的局部放电信号 ...
彭炜文 +5 more
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Mine cable partial discharge denoising method based on multivariate variational mode decomposition and improved wavelet threshold [PDF]
The insulation state of the mine cable plays an important role in the stable operation of the mine power supply system. Partial discharge on-line monitoring is an important means of cable insulation state monitoring.
Jiyuan CAO +6 more
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, 2020 随着国家经济不断的增长，特别是东部沿海城市，对于电能的需求日益增大，加之中国能源与需求逆向分布，因此，远距离、大容量、特高压、交直流混联成为中国电网的一大特点。直流输电以其输送容量大、线路损耗小、稳定性好、快速灵活控制等特点已然成为一种极其重要的输电方式。而换流阀就是直流输电过程中的一大核心设备，但换流阀在使用的过程当中会出现局部放电的现象，而这一现象就会导致换流阀设备故障，引起直流闭锁，影响直流输送。因此要对它局部放电产生的原因进行分析并且提出一些处理的措施。
加 赵
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Research of High Voltage Switchgear Appliance Based on Ultraviolet Detection [PDF]
, 2014 伴随着我国智能电网规模的不断扩大，对电力系统的安全运行要求越来越 高，同时，因高压放电引起的电网事故尤其是因绝缘问题造成的事故发生也在逐 渐增多。据相关专业部门的统计分析，目前因绝缘问题导致的电力系统事故占所 有电力事故中的第二位，因事故造成的经济损失、影响范围不可估量。 故采用先进有效的检测技术，预先发现和处理绝缘缺陷或线路隐患，对高压 电气设备的维护、修理、防止事故发生具有深刻的意义。本文在分析国内外大量 文献的基础上，基于紫外检测技术、高压电气设备放电原理，研究了以日盲区紫 外光信号为特征的 ...
邢文涛
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The platform policy matrix: Promotion and regulation
Policy &Internet, Volume 17, Issue 1, March 2025.Abstract This study provides a comprehensive analysis of policy measures adopted by countries in response to the rapid growth of digital platforms, which significantly impact various sectors and national economies. It examines the delicate balance between regulation and innovation, offering nuanced policy recommendations.
Junic Kim, Shanghe Ahn
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Abnormal sound detection method for coal mine belt conveyors based on convolutional autoencoder [PDF]
To address the issue of insufficient abnormal sound samples for coal mine belt conveyors, which makes it difficult for training models to recognize anomalies, an abnormal sound detection method for coal mine belt conveyors based on Convolutional ...
PEI Wenliang +4 more
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Research on Condition-based Maintenance Technology for Power Transformer [PDF]
, 2010 变压器是电力系统中最重要的设备之一，一旦故障停电将对系统的供电可靠性造成极大的影响。近年来，变压器状态检修方式越来越受到我国电力企业的欢迎，深入开展变压器状态评估，制定合适的变压器检修策略，推行变压器状态检修，对节省运营成本和确保安全供电具有深远的意义。 论文主要介绍了变压器状态检修的主要内容，分析变压器常见的故障类型和成因，阐述了油中溶解气体的产生机理。分析并确定变压器几种油中溶解气体含量作为状态评估的状态量，对变压器状态评估的研究方法进行探讨，分析了其相应特点和功能 ...
刘继宗
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