Results 11 to 20 of about 4,283 (109)
全球能源互联网, 2023 针对特高压直流闭锁等原因造成的受端电网频率严重跌落问题，提出一种储能紧急频率控制策略。首先，建立储能参与紧急频率控制的数学模型。其次，对于大功率缺额后发电机组惯性响应不足问题，提出了改进的频率变化率（rate of change of frequency，RoCoF）下垂控制策略以提高储能的惯量支撑，根据储能比例分配系数实时调节储能虚拟惯性及下垂控制出力；惯性响应阶段以RoCoF下垂控制为主、虚拟惯性控制为辅，抑制系统频率变化率；结合频率调节需求和储能系统出力特点提出不同区域的调频策略 ...
苏大威, 郝雨辰, 高水朋, 葛乐
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全球能源互联网, 2021 大规模的可再生能源并网使得电网内传统机组占比减小,惯性水平降低,电网的频率稳定性面临严重挑战。储能作为一种优质的调频资源,其调频时的高额注入功率会改变系统原有潮流,可能导致部分线路功率越限,因此提出了考虑系统潮流约束的“储能-输电网”联合规划模型。首先分析系统频率最大偏差与储能装机功率以及机组停运功率的关系,对系统内不同故障下的储能需求进行估计；然后以储能与输电线路扩建总成本最小为目标,建立考虑潮流约束的储能与输电线路扩建联合规划模型；最后基于修正的IEEE-39节点系统进行算例验证 ...
郭嘉庆 +4 more
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People and Nature, Volume 5, Issue 6, Page 2158-2177, December 2023., 2023 Abstract Global change is increasing the frequency and severity of human‐wildlife interactions by pushing people and wildlife into increasingly resource‐limited shared spaces. To understand the dynamics of human‐wildlife interactions and what may constitute human‐wildlife coexistence in the Anthropocene, there is a critical need to explore the spatial,
Christine E. Wilkinson +4 more
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Integrative Conservation, Volume 2, Issue 2, Page 95-107, June 2023., 2023 This is a study of the spatiotemporal patterns of Human−Elephant conflict in a community area adjacent to Kuiburi National Park, southern Thailand. We examined temporal and spatial patterns of elephant crop raiding by assessing the locations of elephant raids in conjunction with environmental factors along with crop characteristics and crop ...
Poldej Kochprapa +4 more
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Journal of Diabetes, Volume 15, Issue 6, Page 496-507, June 2023., 2023 Highlights Using a large‐scale prospective population‐based cohort study, we found that a higher frequency of daytime napping is associated with an increased risk of incident type 2 diabetes (T2D), and such relations are modified by body fat percentage (BFP) and C‐reactive protein (CRP) levels.
Rui Zhou +9 more
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Family Process, Volume 61, Issue 2, Page 571-590, June 2022., 2022 Abstract Several effective interventions have been developed for families with multiple problems (FMP), but knowledge is lacking as to which specific practice and program elements of these interventions deliver positive outcomes. The aim of this study is to assess the degree to which practice and program elements (contents of and structure in which ...
Loraine Visscher +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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Gongye shui chuli, 2020 以交流异步电机、多级离心水泵及反渗透膜系统的运行特性为基础，明确了特定反渗透系统在恒通量及恒收率的运行条件下，回流调节、截流调节与变频调速3种系统运行调节方式的特点；分析了3种运行调节方式各自的能耗水平，论证了变频调速方式是反渗透系统最为节能的运行调节方式。
赵冲 +4 more
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Gaoya dianqi, 2023 “双碳”目标的实施和新型电力系统的建设极大推动了可再生能源并网发电进程，电力系统的结构也因此发生巨大改变。由于可再生电源无法参与电网的惯性和阻尼调节过程，并网后极易造成电网频率失调、负载功率失稳现象。因此，文中提出一种基于虚拟同步机（virtual synchronous generator,VSG）技术的风—光—储系统自适应调频控制策略。首先，在风—光—储VSG系统结构基础上建立数学模型，并分析VSG技术调频特性；然后，综合考虑风电、光伏发电曲线 ...
郑云平, 亚夏尔·吐尔洪
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Journal of Animal Ecology, Volume 95, Issue 7, Page 1178-1193, July 2026.This population‐comparative study reveals that male and female parents respond differently to social and ecological conditions. This sex‐specific responsive strategy is related to the incongruent parental care systems across populations in Chinese penduline tits.
Jia Zheng +5 more
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