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Power System Transient Stability Preventive Control Optimization Method Driven by Stacking Ensemble Learning [PDF]
, 2023 Aiming at the contradiction between the rapidity requirement of online calculation of transient stability preventive control and the computational complexity of time-domain equations, a stacking ensemable learning driven optimization method for power ...
HU Wei +7 more
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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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Discharge characteristics and discharge simulation model of long air gaps containing a floating conductor [PDF]
, 2022 Long air gaps containing a floating conductor are common insulation types in power grids. During the transmission line live-line work, the process of lineman entering the transmission line air gap constitutes a live-line work combined air gap, which is a
Gao, Jiachen <1995>
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Summary of Desert Photovoltaic Power Transmission Technology [PDF]
To achieve carbon peaking and carbon neutrality goals and improve energy efficiency, new energy plays a major role in China strategic deployment. However, as centralized photovoltaic is located in desert areas, photovoltaic power transmission has become ...
CHU Shuai +5 more
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Dianci bileiqi, 2020 特高压直流极母线避雷器在运行过程中容易出现电流涌动干扰,会对其运行安全性产生不良影响。提出了一种基于直流振荡频率负阻尼特性分析的特高压直流极母线避雷器运行安全测试技术。以电压、基线电流、电磁感应强度等参数为约束参数,模糊相关性融合特征量方程;建立特高压直流极母线避雷器的稳态控制模型;基于直流振荡频率负阻尼特性,采用模糊信息融合方法进行特高压直流极母线避雷器运行状态的稳态模型构造;建立特高压直流极母线避雷器运行稳态特征方程,结合正阻尼重构的的稳定控制方法进行特高压直流极母线避雷器运行状态特征分析 ...
赵珏斐, 芮新花
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The Analysis of Impact on Per Capita Real GDP of Provinces in Western Region by Western Region Development Program [PDF]
, 2016 自改革开放以来，我国经济发展取得了巨大成就，但同时地区间经济发展水平的差距也越来越大，为了促进我国区域经济协调发展，缩小东西部地区发展差距，2000年国家正式实施了“西部大开发”战略。在政策实施15年积累了足够多数据的基础上，本文首先分析了“西部大开发”对西部省份人均实际GDP增长率的影响，在此基础上分析了“西部大开发”对我国经济收敛性的影响，从这相互联系的两方面对“西部大开发”的政策效果进行了评价，结论是“西部大开发”基本实现了其战略目标。 在政策绩效评价广泛应用的“反事实”方法中 ...
孙天柱
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Rare Metals, EarlyView.ABSTRACT With the continuous advancement of materials science and technology, the rare metal gallium has increasingly emerged as a promising alternative to the toxic metal mercury. Although existing research has predominantly focused on the high electrical conductivity and excellent deformability of liquid metal (LM), its intrinsic fluidic property ...
Feifan Guo +6 more
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Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 5, Page 621-630, November 2025.ABSTRACT Objectives To compare the maternal hemodynamics of Chinese women at low and at high risk for preterm pre‐eclampsia (PE) and assess the differences in hemodynamic parameters between high‐risk women with or without prophylactic aspirin. Methods This was a prospective longitudinal case–control study of 857 Chinese women with a singleton pregnancy
X. Wang +11 more
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Gaoya dianqi, 2019 随着特高压交直流工程大规模建设和交直流耦合程度的加深,多直流馈入受端电网主变充电对直流输电及受端电网运行具有一定影响。根据规划2017年淮沪特高压交流南半环重要枢纽苏州站将投运,为了研究特高压交流苏州站启动调试期间充电对锦苏直流运行的影响,在RTDS中搭建了锦苏直流和淮沪特高压交流及周边等值交流电网,采用与锦苏直流输电工程在控制保护功能和故障下的暂态响应等方面特性一致的特高压直流控保真型装置与RTDS构成闭环仿真平台,对锦苏直流近区空充主变以及特高压交流主变后锦苏直流运行情况进行了仿真分析。结果表明 ...
卫鹏 +5 more
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Gaoya dianqi, 2016 极母线金属氧化物避雷器是±800 k V特高压直流换流站的关键过电压保护设备之一,其技术研究和产品开发是实现特高压直流设备国产化的一个重要课题。笔者以中国哈密—郑州特高压直流工程为依托,深入研究了±800 k V特高压直流换流站极母线金属氧化物避雷器的关键技术,包括:1大直径直流金属氧化物电阻片技术;2复合外套技术;3多柱电阻片柱并联技术;4悬挂安装技术等。产品通过了全部的型式试验项目,成功地应用于±800 k V哈密—郑州特高压直流工程中,填补了国内特高压直流极母线避雷器领域的空白 ...
胡淑慧
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