Results 21 to 30 of about 263,818 (150)
考虑谐波谐振和电压稳定的海上风电场无功优化配置方法 [PDF]
, 2023 海上风电经长距离高压交流海底电缆接入电网，海底电缆容升效应显著，容易引起工频过电压，同时电力电子器件和线路电容引起的谐波谐振问题也严重影响着电网电能质量，因此进行海上风电场无功配置时应充分考虑过电压和谐波谐振问题。针对上述问题，建立了海上风电场谐波模型，对海上风电场的谐波模态阻抗进行扫描，继而分析海上风电场的谐振特性；然后研究了海上风电场无功特性，计算各种发电出力水平和并网点电压下的风电场无功缺额；接着以降低综合成本为目标，以静态电压稳定裕度、最小补偿容量、谐波谐振及过电压为约束 ...
马明, 梅桂华, 杜婉琳*, 王玲
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全球能源互联网, 2019 电网输配电网损引发的间接碳排放已被我国部分试点碳市场纳入管控。参与碳市场对电网企业而言是机遇也是挑战，电网作为服务低碳能源转型的减排平台，其网损水平并不完全取决于自身管理能力，网损水平的波动使得电网企业暴露于碳市场履约风险之下。前期已基于支持向量机方法，采用2012～2016年能源主管部门披露的某省有关数据，构建了网损统计分析模型。进一步根据某省发展规划构建多个未来发展假想场景，根据试点碳市场规则，对2017～ 2020年期间某省电网网损水平和碳排放配额仓位进行态势推演。基于碳排放配额仓位推演结果 ...
黄杰 +6 more
doaj +1 more source
, 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
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT With the rapid development of flexible electronics, there is an increasing demand for hydrogel‐based sensors with rapid fabrication, robust mechanical performance, and stable sensing behavior. Herein, a green and ultrafast self‐catalytic strategy is developed to fabricate a multifunctional hydrogel based on tannic acid‐coated cellulose ...
Jin Qian +6 more
wiley +1 more source
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The electrocatalytic co‐reduction of CO2 and nitrate (NO3− ${\text{NO}}_{3}^{-}$) to synthesize urea presents a sustainable alternative to traditional industrial processes, yet its efficiency is fundamentally limited by the kinetically mismatched activation and coupling of CO2 and NO3− ${\text{NO}}_{3}^{-}$.
Jiayu Liu +9 more
wiley +1 more source
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Many metallic components are frequently subjected to coupled environments of friction and vibration, stemming from interfacial contact and relative motion between mating parts or external stimuli. Consequently, it is imperative for these components to exhibit a synergy of high wear resistance and superior damping properties.
Ze Pu +12 more
wiley +1 more source
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
wiley +1 more source
, 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
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Metal‐Based Materials for Redox Modulation in Biomedicine
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Metal materials have become increasingly important in modulating biological redox networks for therapeutic and diagnostic purposes, owing to their distinctive electronic properties and adaptable reactivity. This review synthesizes recent developments across various metal‐based materials, including elemental metals, metal oxides, coordination ...
Yan Fan +7 more
wiley +1 more source
Acupuncture for Lateral Epicondylitis: A Systematic Review
Evidence-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