Results 61 to 70 of about 2,274 (128)
基于下垂控制的直流微网的分层控制的研究 Research on the Hierarchical Control of DC Microgrid Based on Droop Control
, 2016 黄芳辰, 惠晶
semanticscholar +1 more source
Gaoya dianqi随着风电等新能源以及直流电网的发展，断路器开断电流的频率呈现出多样化，要求断路器可以开断高于或者低于50 Hz的电流。针对此问题，文中试图从燃弧过程、磁场调控以及弧后过程3个方面去研究电流频率对真空断路器开断能力的影响。文中首先研究了不同频率下的电弧微观参数分布，发现随着频率的增加，电弧形态越呈现出集聚的现象，触头呈现出局部烧蚀严重的现象，但是由于燃弧时间变短，触头总的烧蚀变小。频率越低，燃弧时间越长，触头则呈现出严重的烧蚀。然后研究了不同频率下常用杯状纵磁触头的磁场分布，发现随着频率的增加 ...
丁璨, 李凯明, 袁召, 陈立学
doaj
基于PLO-SVMD与CNN-BiGRU-ATT的直流微电网故障诊断方法
Gaoya dianqi针对因噪声干扰而导致直流微电网故障识别精度下降的问题，提出一种基于PLO-SVMD与CNN-BiGRU-ATT的故障诊断方法。首先，以最大互信息系数（MIC）为适应度函数，采用极光优化算法（PLO）优化逐次变分模态分解（SVMD）中的惩罚因子，提升信号分解质量与稳定性。其次，依据特征指标筛选出与故障特性高度相关的模态分量，抑制噪声干扰并完成信号重构。最后，构建CNN-BiGRU-ATT分类模型，融合卷积神经网络（CNN）的局部提取能力，双向门控循环单元（BiGRU）的时序建模能力以及注意力机制（ATT ...
毕鑫印, 何山
doaj
Control Strategy for Improving Operation Energy Efficiency of Bow Thruster in Shipboard Microgrid [PDF]
, 2018 Feng, Ji +4 more
core +1 more source
[Extracellular matrix materials and tissue regeneration and repair]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiZhao L, Xie H.
europepmc +1 more source
Study on Grounding Technology of Convertor Station Project under Special Geological Conditions
, 2017 丁 永福
semanticscholar +1 more source
[Effects of ultrathin inguinal flap free transplantation in repairing hand and foot wounds]. [PDF]
Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za ZhiZhang WD +6 more
europepmc +1 more source
[Research progress on flexible wearable sensors for health monitoring]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiChen X, Xu G.
europepmc +1 more source
[Research progress on combined transcranial electromagnetic stimulation in clinical application in brain diseases]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiWei Y, Wang T, Wang C, Zhang Y, Xu G.
europepmc +1 more source