Results 51 to 60 of about 2,426 (103)

河南平高直流隔离开关研制取得新进展

Gaoya dianqi, 2013
2013年1月8日,河南平高集团自主研发的ZGW6-1120/J6300-25型高压直流隔离开关及ZJW1-1120/J25型高压直流接地开关通过动热稳定试验。1 120 kV直流隔离/接地开关是根据我国首条"准东-成都"±1 100 kV特高压直流输电工程建设需求而研发的新产品,是平高集团2012年重点科技项目之一。
doaj  

[Clinical symptoms and cone beam computed tomography imaging analysis of patients with temporomandibular joint osteoarthritis with chewing side preference before and after treatment of stabilization splint]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Li X, Wang J, Xu L, Xu X, Li H, Hu M, Liu H, Jiang H.   +7 more
europepmc   +1 more source

[Simulation analysis of adaptability of large airborne negative pressure isolation cabin to aviation conditions]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Guo L, Li F, Jiang L, Du H, Xue B, Yong W, Jiang Y, Zhang M.   +7 more
europepmc   +1 more source

[Binary encryption comprehensive experiment based on agarose gel electrophoresis]. [PDF]

Se Pu
Duan JW, Ma L, Zhao Q, Wu QQ, Xin BY, Yang JH, Li Y, Wang QZ.   +7 more
europepmc   +1 more source

[A case of isolated myeloid sarcoma initially presenting as a mediastinal mass]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Yang JH, Zhou QM, Yin XR, Yao XM, Xu XY, Yuan L, Hu Y, Li TH, Tang CH.   +8 more
europepmc   +1 more source

[Comparison of effectiveness between endoscopic and microscopic anterior cervical discectomy and fusion]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Huang C, Chen K, Liu H, Ge Z, Lin D, Chen B, Su G, Lin Y, Hou Y, Li Y.   +9 more
europepmc   +1 more source

[Assessment on data processing methods for nontarget identification of per- and polyfluoroalkyl substances using liquid chromatography-high-resolution mass spectrometry]. [PDF]

Se Pu
Zhang BX, He QW, Han BC, Ma CD, Luo ZJ, Meng XZ.   +5 more
europepmc   +1 more source

基于电机输出功率的隔离开关机械故障检测技术研究

Gaoya dianqi
高压隔离开关在变电站中用量较多，其运行状态对电网安全稳定运行影响较大，但由于高压隔离开关长期暴露于户外环境，容易出现各种机械缺陷。文中提出一种基于电机输出功率的隔离开关机械故障检测技术，通过检测隔离开关动作过程中电机的电压与电流，获得电机输入功率，进一步减去在电机内部传递过程中的功率损耗，得到电机输出功率，可以有效避免电机功率损耗对测试结果的影响。针对电力系统中常用4种110 kV及以上电压等级的隔离开关典型波形进行分析，明确各段波形波峰波谷的位置及对应机械状态，为后续机械故障诊断提供指导 ...
马宏明, 钱国超, 赵现平, 阮江军, 刘宇飞   +4 more
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[Short-term effecetiveness of endoscopic lumbar discectomy combined with annular suturing in treatment of lumbar disc herniation]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhang S, Yao F, Liao Z, Wang T, Shen M.
europepmc   +1 more source

[Follow-up study evaluating morphological changes in alveolar bone in the maxillary anterior region after extraction retraction in adult patients treated with clear aligners on the basis of cone beam computed tomography data]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Hong X, Zhang W, Qi S, Yang L, Shen W, Liu J.   +5 more
europepmc   +1 more source