Results 111 to 120 of about 6,902 (157)

[Nasopharyngeal carcinoma in children: clinical analysis of 6 cases and literature review]. [PDF]

open access: yesZhongguo Dang Dai Er Ke Za Zhi
Tang ML, Zhang WL, Wang YZ, Zhang Y.
europepmc   +1 more source

基于超声导波的钢管杆件损伤探测模拟

open access: yesJianzhu Gangjiegou Jinzhan
为研究网架结构中钢管杆件损伤缺陷检测的问题,选择在杆端施加位移的方式进行有限元分析。考虑超声导波需要具有在特定频率范围内不发生频散的特征,选择L(0,2)模态超声导波开展无损检测。分析了适用于钢管无损检测的导波信号频率和信号周期特征,利用L(0,2)模态超声导波进行了不同圆周夹角的周向缺陷和不同长度轴向缺陷的导波检测。有限元分析结果表明,考虑多模态叠加和最大反射率的影响,频率为70 kHz周期为10的Hanning正弦信号激励的超声导波适用于钢管杆件的缺陷检测;当钢管缺陷宽度与深度不变时 ...
曹栋   +4 more
doaj  

[Systemic necrotizing lymphadenitis: a case report]. [PDF]

open access: yesZhonghua Xue Ye Xue Za Zhi
Fu LL, Sun S, Wang DD, Li JN.
europepmc   +1 more source

[Advances in multimodal biomedical imaging of small animals]. [PDF]

open access: yesSheng Wu Yi Xue Gong Cheng Xue Za Zhi
Deng Z, Xi P, Tang J, Ren Q, Yu Y.
europepmc   +1 more source

[A case of Harel-Yoon syndrome with seizures caused by an ATAD3A variant]. [PDF]

open access: yesZhongguo Dang Dai Er Ke Za Zhi
Yang Q, Pan Z, Chen C, Yin F, Peng J.
europepmc   +1 more source

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