Results 121 to 130 of about 2,347 (168)

[A case of young adult with neck lymphoma presenting with recurrent syncope as the initial symptom and literature review]. [PDF]

open access: yesLin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Xu X   +5 more
europepmc   +1 more source

[Establishment and application of key technologies for periodontal tissue regeneration based on microenvironment and stem cell regulation]. [PDF]

open access: yesBeijing Da Xue Xue Bao Yi Xue Ban
Ma B   +10 more
europepmc   +1 more source

[Treatment of inferior pole patellar fractures with suture anchors and headless compression screws]. [PDF]

open access: yesZhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Wang J, Zhang W, Tian Z, Jiang Y, Yao Q.
europepmc   +1 more source

基于改进MPE和K-medoids的变压器绕组松动故障诊断

open access: yesGaoya dianqi
为了更加有效地对变压器绕组松动故障进行诊断,针对变压器有载运行时的振动信号,提出了一种基于改进多尺度排列熵(MPE)和K-medoids的变压器绕组松动故障诊断方法。首先采用粒子群优化(PSO)的MPE算法对绕组不同状态下的变压器振动信号进行特征提取,以减少MPE算法中参数设置对故障类型识别精度的影响,然后通过K-medoids聚类算法诊断变压器绕组松动故障,以完成故障的分类识别。对某10 kV变压器的绕组松动故障模拟实验结果表明,绕组不同状态下变压器振动信号的MPE值经PSO参数优化后存在明显差异 ...
马宏忠   +4 more
doaj  

[Laparoscopic modified transcystic biliary drainage for the treatment of biliary stones and diagnosis of biliary disease]. [PDF]

open access: yesBeijing Da Xue Xue Bao Yi Xue Ban
Zhang L   +6 more
europepmc   +1 more source

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