Results 61 to 70 of about 5,992 (112)

考虑杆塔接地装置布置的埋地油气管道电位升抑制措施研究

Dianci bileiqi
雷击杆塔时会导致不满足国标要求的临近埋地油气管道产生过高电位升，如何在空间受限情况下进行改造成为了亟待解决的问题。提出基于杆塔接地装置布置的管道电位抑制方法，通过CDEGS建立临近接地装置的埋地油气管道模型，开展模拟试验验证其准确性，定义风险系数评估管道风险并分析隔离、垂直引流和水平引流3类措施对管道电位升的抑制效果。结果表明：加装隔离墙降压效果最优，最高可降38.2%；引流类措施在高土壤电阻率情况下降压效果更好，选用30 m左右的接地体效益最高，最后提出了一种组合措施，可以使风险系数降低到安全区附近 ...
双明镜, 黄道春, 段绍辉, 刘媛, 宗伟, 阮江军, 周灵杰   +6 more
doaj  

[Master manipulator of vascular intervention surgical robot based on haptic feedback]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Han G, Sun Z, Tang X.
europepmc   +1 more source

[Exploration and application of nanotechnology in precision transarterial chemoembolization for hepatocellular carcinoma]. [PDF]

Zhonghua Gan Zang Bing Za Zhi
Kong JQ, Li R, Zuo RN, Zhang X, Ding ZH, Dai Y.   +5 more
europepmc   +1 more source

35 kV风电场架空集电线路不同防雷方式等同性研究

Gaoya dianqi
35 kV风电场架空集电线路多位于山岩地区，雷击跳闸率高，需要相应的防雷措施。目前，在山岩地区降低接地电阻困难，成本高，接地电阻值难以达标。文中研究了35 kV风电场架空集电线路的等效降阻防雷措施。结果表明，架设耦合地线时，耐雷水平可以达到接地电阻为5Ω时的水平；当35 kV集电线路安装线路避雷器时，雷击避雷线GJ-100、雷击避雷线OPGW、雷击导线时耐雷水平的提升幅度分别为8.23、7.86、70.8倍，对比降低接地电阻有更显著的提升效果。该研究将在35 ...
周秀, 逯梓来, 白金, 田天, 常文治, 杨鑫, 李科, 焦艺哲   +7 more
doaj  

[A head direction cell model based on a spiking neural network with landmark-free calibration]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Yu N, Huang J, Lin K, Zhang Z.
europepmc   +1 more source

[ROMO1 Promotes the Repair of Radiation-induced Skin Injury by Regulating Mitochondrial Function and Keratinocyte Proliferation]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Yang T, Tu W, Tang X, DU M, Maheliya A, Yu Z, Qu S, Bai H, Zhang S.   +8 more
europepmc   +1 more source

[Rehabilitation guidelines and specifications for traumatic spinal cord injury (2025 edition)]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Professional Committee Of Spine And Spinal Cord Injury Rehabilitation China Association Of Rehabilitation Of Disabled Persons, Professional Committee Of Spine Chinese Association Of Rehabilitation Medicine, The Second Medical-Rehabilitation Integration Working Committee Chinese Association Of Rehabilitation Medicine, Spine And Spinal Cord Injury Repair Study Group The Third Professional Committee Of Neurorestoratology Chinese Medical Doctor Association.   +3 more
europepmc   +1 more source

500kV架空输电线绝缘子串雷电波形测量系统的发展

Dianci bileiqi, 1991
叙述了测量系统的发展。该系统采用了快速响应抗干扰光电传感器。影响输电线路运行的主要雷害事故是杆塔电压升高通过绝缘子反击。为了预防雷电反击事故并进行保护,需要很好地了解雷电反击的机理,包括杆塔顶电位升高、杆塔电位分布、招弧角放电特性等,这就使理论分析很困难。最好的办法是测量雷电实际波形,但由于电压高,波头短 ...
doaj  

[Exploration and clinical application of the "digital and intelligent surgery" diagnosis and treatment workflow for oral and maxillofacial tumors]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
DU W, Zhang W, Yu Y, Liu S, Su H, Hu L, Tang Z, Wu B, Chen Z, Li J, Wang H, Peng X.   +11 more
europepmc   +1 more source

[Development of a machine learning-based ionization efficiency prediction model for per- and polyfluoroalkyl substances and its application in semi-quantitative analysis]. [PDF]

Se Pu
Sun SZ, Li YY, Gao Y, Li KC, Chen Z, Li XQ, Zhang QH.   +6 more
europepmc   +1 more source