Dianci bileiqi为解决谐振接地系统单相接地故障对故障初始角为零以及接地电阻为高阻的故障线路识别效果差的问题，提出一种基于主成分分析与粒子群算法优化支持向量机（PCA-PSO-SVM）的选线方法。该方法通过Matlab/Simulink对小电流接地系统进行仿真，采集瞬时零序功率数据，将数据输入PCA-PSO-SVM模型中进行训练与测试，并将测试结果与单一的支持向量机模型以及经粒子群优化后的支持向量机模型进行对比，结果表明PCA-PSO-SVM模型有着更好的选线准确度与选线效率。
聂远航 +4 more
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[Research progress on olfactory function and rehabilitation after total laryngectomy]. [PDF]
Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za ZhiZhu X +5 more
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Dianci bileiqi配电网线路繁多，覆盖范围广，易遭受雷电袭击，破坏力度大。通过建弧机理和熄弧特性分析，中性点不接地方式虽不易建弧，一旦建弧难于熄灭，当系统电容电流较大时仍会有较高的建弧率。消弧线圈接地方式下若补偿度不足或者较高时，会加大接地电弧重燃概率。小电阻接地方式下虽可防护弧光接地过电压，但无法识别故障性质，无法处理高阻接地故障。因此可根据配电网不同的线路结构优化中性点接地方式以降低雷击建弧率。不接地方式仅适用于电容电流小于10 A的以架空裸导线为主的配电网 ...
郝树青, 何肖蒙, 张洋, 李华鹏
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[Development of a balloon sensor device for force-electrical coupling measurement of esophagus]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiRan P +5 more
europepmc +1 more source
[Positive cortical support reduction in treatment of trochanteric femur fractures: history in theory establishment and its inspiration for clinical innovations]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiChang S.
europepmc +1 more source
[<i>Danzhi Jiangtang</i> Capsule improves renal vascular endothelial function in rats with diabetic nephropathy by downregulating the Notch1/NICD/MAML1 signaling pathway]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoZhu S +7 more
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[Role of Intestinal Mucosal Barrier in Type 2 Diabetes Mellitus and Research Progress in Chinese Medicine Interventions]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue BanYan C, Wang Q, Zhan L.
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[Bayesian network analysis of harsh parenting, experiential avoidance, and adolescent short video addiction risk]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiLyu LH +5 more
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[Parallel mediating effects of maladaptive cognitive emotion regulation strategies and impulsivity on the relationship between trait anxiety and non<b>-</b>suicidal self<b>-</b>injury behaviors in adolescents]. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue BanMeng L, Chen J, Yang F, Long Y, Fan Z.
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Dianci bileiqi为更高效、更准确地进行接地网故障诊断，本文提出基于模态路径层析法的接地网故障区域成像诊断模型。首先，将接地网拓扑结构变换成只含可及节点的模态路径网络图，依据连接支路数选择网络枢纽点，测量与其相连支路阻值并计算相对误差，选取相对误差最大点为下一层诊断节点，如此逐层剖析确定腐蚀区域；然后在该区域采用电阻抗成像技术（EIT）进行电导率二维成像；接着针对EIT技术成像精度受电导率初值分布影响较大的问题，提出采用改进的登山队优化算法（IMTBO）对电导率进行初值寻优 ...
常红阳, 王昕, 唐浩哲, 江恒
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