Results 71 to 80 of about 8,968 (115)

汾西煤矿35kV变电站接地改造分析

Dianci bileiqi, 2013
通过对汾西某煤矿35 kV变电所雷害事故进行仔细分析,其主要原因是地网接地电阻超标、均压不完善、以及冲击接地阻抗过高等。经过现场试验、以及结合现场实际情况并且充分考虑煤矿供电特殊性,决定采用铺设冲击接地均压环降低冲击接地阻抗及改善电位分布,利用自然接地体以及敷设GPF-94高效膨润土降阻防腐剂来达到降阻、防腐的目的。改造之后,通过试验论证,各项接地参数均符合要求,达到预期改造效果。
周利兵, 童年, 周易龙, 陈锦麟
doaj  

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  

ROADM节点内阻塞限制下的RWA算法研究

Guangtongxin yanjiu, 2015
ROADM（可重构的光分插复用器）是构建大型全光交换网络的核心设备。目前,大部分商用ROADM支持无色和无向性,但无阻塞性由于其高成本仍无法广泛应用,因此有效降低光通信业务的阻塞率是当前亟待解决的问题。文章基于具有多个上下路端口模块的有阻塞ROADM节点架构,提出了三种RWA（路由和波长分配）算法,以有效提高光通道业务的阻塞性能。仿真结果表明,结合上下路端口状态的波平面算法能有效地降低光通道业务的阻塞率。
王晓玲, 高丽, 沈纲祥
doaj  

[Association between ambient personal temperature exposure and oxygen saturation during sleep in patients with chronic obstructive pulmonary disease]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Zuo M, Zhang W, Chen B, Zhao C, Chen Y, He J, Guo X, Deng F.   +7 more
europepmc   +1 more source

[Intravenous dexamethasone enhances efficacy of brachial plexus block <i>via</i> the costoclavicular space: a randomized, double-blind, single-center trial]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Wang S, Wu M, Sun N, Lin C, Chen Y, Zhang C, Deng F, Ma X, Fang H.   +8 more
europepmc   +1 more source

[Petroleum ether fraction of <i>Myrica nana</i> roots relieves spasmodic abdominal pain in mice by inhibiting intestinal smooth muscle spasm]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Yang S, Chen W, Chen X, Tian K, Xiong Y, Sun J, Huang L, Huang X, Wang Z.   +8 more
europepmc   +1 more source

[Research progress of lymphaticovenous anastomosis in treatment of severe extremity trauma]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Huang X, Liu Z, Zhou R, Li J, Ju W, Ju J, Hou R.   +6 more
europepmc   +1 more source

[Effectiveness of T ₁ nerve root transection in treatment of spastic hand contracture in cerebral palsy]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Xu Y, Wang T, Cai X, Zong H, Lin W, Yang X, Pu S, Li X.   +7 more
europepmc   +1 more source

[Efficacy of CD4/TGF-β bispecific antibody in a mouse model of peritoneal metastasis of malignant melanoma]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Jiang Q, Liu T, Wang Z, Jiang S, Wu H, Lin Y, Shiying LU, Chen L, Zhang J, Tang L, Raut RK, Xu Z.   +11 more
europepmc   +1 more source

[Determination of 22 organophosphates and their metabolites and 11 phthalate metabolites in human whole blood by ultra performance liquid chromatography-tandem mass spectrometry]. [PDF]

Se Pu
Shi FY, Xu HY, Li JH, Xu MY.
europepmc   +1 more source