Dianci bileiqi大量的分布式光伏接入改变了传统配电网结构和潮流，使配电网接地故障特征发生改变。通过分析光伏并网容量、位置、光伏出力波动性及并网高次谐波对接地故障的零序电压的影响，发现对比光伏接入前，零序电压的各类时频域特征受到了不同程度的影响，甚至出现了部分接地故障时频域特征混淆的问题，造成故障辨识难度加大。对此，本文提出基于零序电压的VMD-MPE-CNN接地故障辨识算法。首先，采用VMD-MPE算法对零序电压信号进行分解，并计算本征模分量的多尺度排列熵得到故障特征矩阵。然后 ...
龙国华 +5 more
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[Radix codonopsis combined with Poria improves cognitive impairment in rats with unilateral common carotid artery ligation by regulating the ERα/PI3K/Akt signaling pathway]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoYang J +7 more
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[<i>Lactobacillus plantarum</i> alleviates lead exposure-induced learning and memory impairment in mice by regulating bile acid metabolism and inhibiting hippocampal NLRP3 expression]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoLi L, Yu W, Tan M, Li Y, Liu A, Meng X.
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[Research progress on paper-based microfluidic chips in pathogen detection]. [PDF]
Se PuLiu XT, Shi J, Shi M.
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[Progress in electric field assisted molecular imprinting technology]. [PDF]
Se PuWu JY, Huang XJ.
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Gaoya dianqi推动分布式光伏集群并网是实现中国双碳目标的有效举措之一。然而，强随机性、间歇性的分布式光伏集群分散无序的接入，给电网带来了系统惯量不足、系统强度减弱等系列问题。为此，文中对分布式光伏集群优化控制技术进行系统梳理和总结归纳。首先，归纳并阐述分布式光伏集群优化控制技术的研究方式及现状；其次，分析不同并网方式之间的差异及大力推广集群并网的原因，及集群划分算法和判据；紧接着，介绍储能和控制等集群优化控制关键技术。最后，考虑实际工程需求，对分布式光伏集群面临的挑战和未来发展趋势做了进一步阐述 ...
魏联滨 +4 more
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[Treatment of root fracture of immature maxillary permanent central incisor combined with impacted supernumerary tooth in the apical region: a case report]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiSun J, Qian H, Wu X, Liu H, Liu Q.
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Gaoya dianqi, 2011 可再生能源"十二五"规划的征求意见稿中对屋顶光伏系统的建设目标作了具体设定:2015年计划达到300万kW,2020年则计划达到2500万kW。中投顾问新能源行业研究员萧函认为,在《"十二五"规划》中,政府不仅力推集中的光伏电站的发展 ...
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[<i>Chaihu Shugan</i> Decoction improves cognitive impairment after epilepsy in rats by regulating hippocampal NMDAR subunits <i>via</i> upregulating ASIC1]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoYu Y, Xie W, Li H.
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[Systemic lupus erythematosus complicated by autoimmune nodopathy: A case report]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanWei C, Yang Y, Zhao X, Liu X, Jia Y.
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