Results 51 to 60 of about 1,741 (102)

基于深度学习的雷电活动预测方法及其输电线路防雷应用

Dianci bileiqi
为提升输电线路雷击灾害主动防御能力，提出了一种基于深度学习的雷电活动预测方法，提前时间为72 h，时间和空间精度分别为3 h和5 km。基于统一的时空网格完成了预报区域雷电数据的归一化，通过卡方统一性检验提取了与雷电活动强关联的气象参量；建立了雷电发生概率预测深度神经网络模型，采用贝叶斯算法优化了模型超参数组合；建立了落雷次数与雷电流强度的分类预测卷积神经网络模型。算例验证表明，雷电发生概率预测的平均命中率和虚警率分别为69.10%和71.18%，落雷次数和雷电流强度预测命中率的平均值分别为39.03 ...
张永刚, 谷山强, 李健, 吴大伟, 王宇   +4 more
doaj  

[Differential analysis of gut microbiome in patients with periprosthetic joint infection, aseptic failure, and osteoarthritis]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Muzhabaier K, Li Y, Wang F, Guo X, Chen Q, Zhang X, Cao L.   +6 more
europepmc   +1 more source

[Mechanism of silibinin in renal injury induced by periodontitis in mice]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Hu M, Shang Y, Che Z, Liu X, Deng Y, Yu W.   +5 more
europepmc   +1 more source

[Analysis of urine biomarkers in urothelial carcinoma based on untargeted metabolomics]. [PDF]

Se Pu
Liu S, Wang M, Wang W.
europepmc   +1 more source

[He<b>'</b>s Yangchao recipe ameliorates premature ovarian insuf-ficiency by remodeling intestinal microbiota to promote granulosa cell glycolysis]. [PDF]

Zhejiang Da Xue Xue Bao Yi Xue Ban
Lin F, Liu Q, Zhao Y, Chen Y, Wang R, Miao C, Zhang Q.   +6 more
europepmc   +1 more source

[POEMS syndrome misdiagnosed as systemic sclerosis: A case report]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Liang J, Zhang X, Yao H.
europepmc   +1 more source

[Effects of cold atmosphere plasma treatment on the biological behavior of human gingival fibroblasts]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Zheng M, Ma X, Chen H, Zhao H, Zhang Y, Tan J, Li H, Wang X.   +7 more
europepmc   +1 more source

[Simultaneous identification and detection of four novel isoxazoline drugs in bovine-origin foods using ultra-high performance liquid chromatography coupled to quadrupole/linear ion trap mass spectrometry]. [PDF]

Se Pu
Yang C, Zhu WX, Liu YF, Wei W, Zhao F, Hu K, Zhao WJ.   +6 more
europepmc   +1 more source

[<i>Shenqi Xiezhuo</i> Decoction alleviates renal fibrosis in rats by ameliorating oxidative stress and inflammation through the Rap1/MAPK/FoxO3a signaling pathway]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Lu X, Liu Z, Liu Y, Pang T, Bian R, Guo L, He X.   +6 more
europepmc   +1 more source

±800kV特高压直流换流站EM避雷器参数及结构优化设计

Dianci bileiqi
±800kV特高压直流换流站金属回线避雷器（简称：EM避雷器）多次故障分析将原因指向能量耐受性能薄弱电阻片（简称：“矮片”）存在导致的避雷器吸收能量崩溃损坏，为解决EM避雷器故障频发问题，利用PSCAD/EMTDC仿真软件研究系统过电压情况，明确EM避雷器运行中的决定性工况，根据实际需求和设计裕度优化EM避雷器的参数配置和结构型式。参数配置方面，依据过电压计算结果，采用能量吸收和保护水平校验方法，建议提高避雷器的参考电压，增加并联元件数量、提升单片电阻片的能量吸收能力；结构优化方面，采用ATP ...
王陆璐, 左中秋, 惠思思, 黄佳瑞, 吴成成   +4 more
doaj