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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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Power-Line Extraction Method for UAV Point Cloud Based on Region Growing Algorithm [PDF]
, 2023 [Introduction] Since the power line has the characteristics of long transmission distance and a complex spatial environment, the UAV LiDAR point cloud technology can completely and efficiently obtain the geometric information of the power line and its ...
Wei WU, Xingyi LI, Zhiyao ZHAO
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Gaoya dianqi, 2021 同塔混压输电在增大输电容量、节约线路走廊资源和减少建设成本方面具有巨大优越性和发展前景。近年来对于特高压与超高压同塔混合输电开展的前期研究发现,多回输电线路之间存在电磁耦合,影响输电线路的过电压水平。因此需对超、特高压混压输电线路的耐雷水平进行重新评估,以确保输电安全。文中以单回±800 kV与双回500 kV交直流同塔输电线路为研究对象,应用ATP-EMTP软件搭建线路分布式参数模型,并对雷电流、杆塔、波阻抗等分别建立仿真模型,分析了雷电反击与绕击时架空线路上产生的感应过电压特性 ...
曾诚 +4 more
doaj
Deep reinforcement learning based task allocation mechanism for intelligent inspection in energy Internet [PDF]
, 2021 In order to reduce the cost and improve efficiency of power line inspection, UAV (unmanned aerial vehicle), which use mobile edge computing technology to access and process service data, are used to inspect power lines in the energy internet.However, due
Chao YANG +5 more
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Dianci bileiqi, 2022 研究架空输电线路雷击暂态过电压分布规律，为架空输电线路的防雷保护和绝缘设计提供可靠依据。使用Marti线路模型分析架空输电线路的频变特性；利用电晕模型模拟电晕效应，使用镜像法推导输电线路几何电容表达式，计算电晕出现时线路的动态电容。在ATP-EMTP电磁暂态仿真软件中研究线路感应暂态过电压和雷电绕击过电压的暂态分布规律，研究绕击过电压的影响因素。模拟仿真结果表明：同时考虑冲击电晕效应和线路参数频变特性能够更加准确计算出输电线路过电压分布规律；出现雷绕击故障的A相线路电压高于未发生故障的B、C相线路 ...
赵留学, 王建荣, 谭磊
doaj
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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Computational model of safe distance between HVAC transmission line and parallel buried pipeline [PDF]
Objective The vigorous development of China's economy has stimulated the development of public energy corridors. Owing to the similar preference in choosing sites for overhead power lines and oil-gas pipelines, these two kinds of corridors frequently ...
Aiwu LIANG +3 more
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Design and Implementation of Real Three-Dimensional Urban Planning Support Platform [PDF]
, 2015 城市是人类活动最集中的场所，信息化已经成为城市发展与规划的主题， GIS是城市空间信息表达和管理的重要技术手段。近年来，基于GIS技术的各种 城市空间信息管理系统，如城市地下管线系统、土地利用管理信息系统等大多采 用二维平面的管理模式。城市规划涵盖内容广泛，包括城市居住区规划、城市中 心区规划、生态环境规划、历史文物保护规划、市政基础设施工程规划等。随着 现代城市从地面向地下空间、地上空间不断拓展延伸，多层次、立体模式管理逐 渐成为城市规划管理的发展趋势。 本文在对城市规划业务进行充分的考察和了解后 ...
张乐龙
core
Method and application of carbon emission calculation for ultra-high voltage (UHV) project construction [PDF]
, 2023 [Objective] As one of the seven key areas of “new infrastructure” development during China’s 14th Five-Year Plan period, the ultra-high voltage (UHV) projects are the backbone of China’s new power system and is of great significance to the transmission ...
CHEN Xiaohong, FU Yipeng, HUANG Chengdong, WANG Yangjie
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Business Process Optimization for Relay Protection of State Grid Ningde Company [PDF]
, 2016 电力行业是一个对社会经济影响极大，技术经济特征十分复杂的自然垄断产业。国家电网公司正面临电网规模不断扩大、智能电网技术快速发展、三集五大即人力、物力、财力集约化管理，大规划、大建设、大运行、大检修、大生产体系建设的体制改革等现状，而传统的管理方式已无法匹配国网公司的发展。本文以此为研究背景，以宁德供电公司为例，具体研究了大二次专业业务流程优化的相关问题。 首先，本文在对流程管理和流程优化理论进行认真分析的基础上，运用ECRSI分析法、标杆管理等相关理论，分析了宁德供电公司大二次专业业务流程现状 ...
郭茜婷
core