Results 21 to 30 of about 211,315 (155)

考虑智能软开关的有源配电网恢复力评估与提升 [PDF]

open access: yes全球能源互联网, 2022
配电网作为供电的最后环节,其供电恢复速度和恢复负荷的比例影响着整个电力系统的恢复力水平,因此提升系统遭受极端自然灾害下的配电网供电恢复能力显得尤为重要。智能软开关(soft open point,SOP)是一种全控型电力电子器件,具有连续调节功率和提供无功电压支撑等优点,将会在配电系统正常运行和供电恢复中得到广泛应用。以配电网恢复力评估与提升为目标,首先,考虑故障后通过可控分布式电源和SOP恢复负荷供电,建立有源配电网负荷恢复模型;其次,提出将负荷恢复模型嵌入到时序蒙特卡洛模拟过程中的恢复力评估流程 ...
叶宇鑫   +4 more
doaj   +1 more source

支撑新能源基地电力外送的电源组合优化配置策略研究 [PDF]

open access: yes, 2023
新能源基地化开发和电力外送是实现能源电力清洁低碳转型的重要途径。新能源发电间歇性和波动性以及有限的输电走廊资源要求基地配置调节电源以提高新能源电力外送工程的可靠性和源网利用率。提出了基于广域长期历史气象数据,采用时序生产模拟电源扩展优化模型,进行不同送电方案下调节电源与新能源装机优化组合策略的研究方法。以内蒙古沙漠地区新能源基地为例的研究表明,电化学储能为代表的无源型调节电源应配置为外送通道容量的35%左右,从而实现合理的通道利用率和基地发输电经济性;配置有源型调节电源,可实现更高的外送通道利用率 ...
刘泽洪, 金晨, 周原冰
core   +1 more source

International clinical practice recommendations on the definition, diagnosis, assessment, intervention, and psychosocial aspects of developmental coordination disorder – Chinese (Mandarin) translation

open access: yesDevelopmental 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
wiley   +1 more source

Acupuncture for Lateral Epicondylitis: A Systematic Review

open access: yesEvidence-Based Complementary and Alternative Medicine, Volume 2015, Issue 1, 2015., 2015
Objective. This systematic review aimed to assess the effectiveness and safety of acupuncture for lateral epicondylitis (LE). Methods. Seven databases and the WHO International Clinical Trials Registry Platform Search Portal were searched to identify relevant studies.
Hongzhi Tang   +11 more
wiley   +1 more source

一种基于实时量测数据的低压配电网拓扑辨识方法

open access: yes, 2021
本发明公开一种基于实时量测数据的低压配电网拓扑辨识方法。包括如下步骤:通过安装在分支线路处的带有测量功能的电气设备节点,采集线路分支节点的电量值,传送给安装在配电台区的智能融合终端,智能融合终端通过对各个电气设备节点测量的电量值进行计算分析、自动辨识台区低压配电网拓扑结构。本发明采用图论及约束最小二乘回归分析方法从实时电量测量数据矩阵中推断出稳态配电网络拓扑,能够实现“变压器‑低压出线‑分支箱‑表箱‑户表”五级拓扑关系的自动辨识,不需要额外安装硬件设备,是一种纯数据驱动的方法,成本低,易实现 ...
邵帅   +7 more
core  

Ultralight N‐Doped Interconnected Porous Carbon From Lignin: Synergistic Structural and Doping Engineering for High‐Performance Electromagnetic Wave Absorption

open access: yesRare Metals, Volume 45, Issue 6, June 2026.
ABSTRACT The development of lightweight, high‐attenuation, and broadband carbon‐based electromagnetic wave absorbers is hindered by the intrinsic trade‐off between impedance matching and dielectric dissipation. Herein, we report a facile and scalable synthesis of N‐doped lignin‐derived interconnected porous carbon (Nx‐LIPC) via hydrogen‐bond self ...
Bin‐Peng Zhang   +7 more
wiley   +1 more source

Multi‐Walled Carbon Nanotube‐Penetrated Metal–Organic Framework‐Derived TiO2/C 3D Conductive Network Achieves Lightweight, Wide‐Band, Ultra‐Strong Electromagnetic Wave Absorption

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT In recent years, materials capable of achieving efficient electromagnetic wave (EMW) absorption over a broad frequency range have attracted widespread attention. Such materials are not only significant in mitigating electromagnetic interference and pollution caused by the extensive use of electronic devices but also demonstrate outstanding ...
Maoxia Lu   +7 more
wiley   +1 more source

探究配电网自动化系统

open access: yes, 2017
<span>配电网是电力系统中发电、输电和配电这三大系统其中之一。电力公司主要是通过配电网向电力用户提供电能,在社会经济发展的同时,人们的观念随之发生变化,电力公司也将面临电力市场自由化的变革。在应对变革的面前,人们提出配电网实施自动化及其管理系统,这是一项综合性工程,它针对配电网自动化及其管理系统的发展和特点,在根据配电网的地理分布、规模和电网结构,研究出配电网自动化及其管理系统的主要结构和功能,并且对整个系统的实施也进行了探讨。</span>
超 柯
core   +1 more source

Advancements and Applications of 3D Printing Techniques and Novel Materials in Soft Robotics for Medical Devices

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT Additive manufacturing, commonly referred to as three‐dimensional (3D) printing, provides the geometric freedom and multi‐material integration needed to build soft medical robots for minimally invasive interventions, prosthetics, and rehabilitation.
Yao Wang   +5 more
wiley   +1 more source

智能配电网与配电自动化的解析

open access: yes, 2016
经济的快速发展,加大了人们对电量的需求,智能配电网已经成为人们在电力系统分析和研究的主要方向。智能配电网对整个电力系统的进步和升级有着带动作用,智能电网的一个重要组成部分就是配电自动化,目前,我国大力发展配电自动化技术,目的在于提高我国智能配电网水平。 本文就两者之间的联系,以及相应技术的提升、完善措施进行分析,以期对促进我国智能配电网的应用和完善方面有所启示。
维维 帅
core   +1 more source

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