Shiyou jixie, 2012 目前油田在用的油管缺陷检测装置主要存在井口磁化总成安装困难、不具有井口自密封功能和检测信号不稳定等问题，为此开发了一种新型剖分式现场油管缺陷检测装置。该检测装置在油管起下井作业时进行在线检测，不受水、油污和结蜡等的影响，对环境无污染，同时检测装置安装时只需要将井口装置打开，抱合在油管上即可。在声音自动判废信号处理总成中增加了小波滤波装置，更好地消除了震荡等干扰信号。应用该装置现场检测Φ73 mm油管500根，其中轴向沟槽类缺陷油管124根，占检测油管总数的24.8%；孔洞类缺陷油管32根 ...
罗刚 +6 more
doaj
绝缘子ZnS:Cu/BaTiO3复合涂层的闪络强度和缺陷自检测特性研究
Gaoya dianqi绝缘子是电力设备的重要组成部分，但表面绝缘缺陷极易导致突发性沿面闪络事故。为了提高对表面绝缘缺陷的检测能力和绝缘子的沿面闪络强度，文中制备了ZnS:Cu/BaTiO3掺杂的绝缘缺陷自检测复合涂层，将ZnS:Cu电致发光材料引入绝缘系统实现缺陷自检测功能，通过引入高介电常数BaTiO3填料均匀表面电场、提高绝缘子沿面闪络强度。测试了涂层样品的交/直流闪络电压，通过对表面金属微粒缺陷在交流电压下的发光分布和局部放电的观测，考察了涂层对表面缺陷的检测能力。结果表明 ...
刘慕然
doaj
[Clinical and genetic analysis of two families with combined defect in antithrombin and protein C genes]. [PDF]
Zhonghua Xue Ye Xue Za ZhiGuo YL +6 more
europepmc +1 more source
[Clinical and genetic characteristics of 14 children with sodium taurocholate co-transporting polypeptide deficiency]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiMa RX +7 more
europepmc +1 more source
[A case report of Diets-Jongmans syndrome caused by a <i>KDM3B</i> gene variant]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiShen KX +4 more
europepmc +1 more source
[Electroencephalographic assessment of the relationship between frontal alpha asymmetry and emotion dysregulation in children with attention deficit hyperactivity disorder]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiChen L, Zhao LL, Wu XC, Li HY, Zhang WW.
europepmc +1 more source
[Neonatal-onset multisystem inflammatory disease in a neonate caused by a <i>de novo</i><i>NLRP3</i> variant]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiGao FH +4 more
europepmc +1 more source
Dianci bileiqi盆式绝缘子是GIS设备的关键设备，盆式绝缘子的健康状况对GIS以及电网安全运行具有重要影响。文章对超声导波检测盆式绝缘子缺陷进行有限元仿真，并搭建基于超声导波的盆式绝缘子缺陷检测平台，对不同偏移角度的裂纹缺陷和不同排列方向、数量的孔洞缺陷进行检测，来探究在不同角度缺陷和不同数量缺陷下，超声导波检测盆式绝缘子缺陷时的衰减率变化规律，发现裂纹偏移角度（较水平方向）越大，导波幅值衰减率越大，孔洞数量越多，导波信号幅值衰减率逐渐增大，并且，纵向排列的孔洞信号幅值衰减率要比横向排列方向要快。
李阳 +8 more
doaj
[Comprehensive considerations for the diagnosis, treatment, and management of osteogenesis imperfecta]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiLyu XH, Dong J.
europepmc +1 more source
[Whole Exome Sequencing Identified Novel Pathogenic Mutations of <i>ADGB</i> in Patients With Oligoasthenozoospermia]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue BanWang Q, Yang Y, Jiang C, Shen Y.
europepmc +1 more source