Results 71 to 80 of about 12,549 (159)
[Research progress on external cervical resorption]. [PDF]
Zhejiang Da Xue Xue Bao Yi Xue BanChen R +5 more
europepmc +1 more source
[Research progress of lymphaticovenous anastomosis in treatment of secondary lymphedema]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiLuo Z, Xiao S, Deng C.
europepmc +1 more source
基于高速并联开关的多端混合直流工程第三站在线投退关键特性分析
Gaoya dianqi特高压多端混合直流工程运行中需进行第三站在线投退。在当前技术条件下，依靠直流高速并联开关（HSS）与柔直换流阀相互配合实现第三站在线投退。因HSS直流电流分断能力、断口耐压能力相对较弱，有必要对基于直流高速并联开关的多端混合直流工程第三站在线投退关键特性分析。文中基于±800 kV昆柳龙柔性直流输电工程，分析了HSS在各种工况下的直流电流开断能力、断口燃弧耐受能力等关键电气性能。以柳州站为例分析了包括第三站投入、退出及永久故障极隔离等在线投退策略，并提出了HSS与控保系统之间的逻辑配合要求 ...
刘金 +5 more
doaj
[Effect of porous surface structure on fatigue strength of 3D printed zirconia]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanZhao J +6 more
europepmc +1 more source
Gaoya dianqi, 1959 Voigt & Haeffner公司和ASEA公司创制了一种新型空气断路器,它是多断点的,其额定断流容量为8000兆伏安,与之相应的切断电流为21千安。每个断点的切断能力为1000兆伏安,所以断路器的每相由8个断口组成。主要电气特性数据见表1 三相断路器是由三个相同的单极及一个带有压缩空气检验仪表的控制柜所组成 ...
doaj
[Analysis of stimulating factors for serum copeptin based on liquid chromatography-tandem mass spectrometry]. [PDF]
Se PuMu DN +8 more
europepmc +1 more source
[Endodontic retreatment of a maxillary second molar with chronic apical periodontitis and separated instrument: A case report]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanZang H, Liang Y.
europepmc +1 more source
[Development of a surface electromyography index system for orofacial muscles and validation of a discriminant model in unilateral molar occlusal interference]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanLi W +11 more
europepmc +1 more source