Results 71 to 80 of about 13,964 (117)

[Association between depressive symptoms and renal hyperfiltration in middle-aged and older adults]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Yang M, Yin H, Li H, Li Q, Ji X, Zhen D.
europepmc   +1 more source

[Systemic sclerosis with anti-human neutrophil cytoplasm antibody associated vasculitis: A case report]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Yang L, Zou J.
europepmc   +1 more source

短路冲击下低频风电变压器机械特性研究

Gaoya dianqi
低频风电变压器是海上风电用柔性低频交流输电系统的关键设备。为进一步了解低频变压器在短路冲击下的振动特性和受力特性，采用镜像法计算变压器绕组漏磁场，并建立了绕组轴向振动的非线性动力学模型，对一台5 000 kVA低频变压器在17 Hz和50 Hz下的短路冲击振动特性和受力进行了分析。研究结果表明，17 Hz下变压器绕组中的短路冲击电流、振动位移、轴向受力和辐向受力均小于50 Hz时的结果，但绕组振动特性基本相同；17 Hz下绕组垫块面积减小32.5%时垫块的最大压缩力应力与50 Hz时相同；17 ...
吴鹏, 李建生, 李晓涵, 吴益明, 陆云才   +4 more
doaj  

[Evolution of treatment strategies and risk-stratified management of patent ductus arteriosus in preterm infants]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Liu TX, Shi LP, Chen Z.
europepmc   +1 more source

轻钢-钢纤维再生混凝土组合短柱轴心受压性能试验研究

Jianzhu Gangjiegou Jinzhan
提出了一种轻钢-钢纤维再生混凝土组合柱，为研究组合柱的轴心受压性能，设计了5组不同构造短柱试件进行轴压试验，包括1组型钢试件和4组组合柱试件。以截面构造、钢纤维掺入量和再生混凝土强度为变化参数，研究不同参数对组合柱破坏特征、荷载-位移曲线、承载力、刚度、延性的影响。结果表明：提出的轻钢-钢纤维再生混凝土组合柱构造可以改善轻钢柱的稳定性能，显著提高轻钢柱的承载能力；轻钢-钢纤维再生混凝土组合柱的承载能力随着钢纤维掺入量的增加而提高，钢纤维可约束再生混凝土裂缝开展，改善试件损伤和刚度退化 ...
边瑾靓, 陈志华, 刘爽, 杨新磊, 乔崎云   +4 more
doaj  

[Clinical characteristics and classification of deep branch of ulnar nerve injury]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Yang Y, Jin A, Liu R, Jiang X, Xue Y, Sun L, Wang Y, Liu C, Wang Z.   +8 more
europepmc   +1 more source

压型钢板局部削弱后抗弯性能试验研究

Jianzhu Gangjiegou Jinzhan
为研究组合楼板作为承载构件时在压型钢板局部削弱后的受弯性能，对压型钢板的竖直与水平方向进行不同程度的弱化，并在弱化后对钢板进行无侧向约束的受弯试验，研究压型钢板削弱后的受弯性能及其破坏形式。试验结果表明：在均布荷载作用下，各组压型钢板的破坏均以跨中受弯屈曲破坏为主；水平方向洞口削弱了钢板上翼缘承载力，当水平洞口半径为20 mm时，试件抗弯承载力降低约15%；竖向洞口会阻碍钢板上、下翼缘应力的传递，当竖向洞口半径为25 mm时，试件抗弯承载力降低约10%。通过对比可知 ...
徐强, 徐丽萍, 孟令辉, 王明, 李娜   +4 more
doaj  

[Comparative study on effectiveness of two fixation methods in treatment of mid-column plantar-flexion Lisfranc injuries]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Xiao P, Du R, Xue Y, Jia R, Sun G.
europepmc   +1 more source

[Exploration of the mechanisms of portal hypertension driven by metabolic disorders in non-cirrhotic stages of metabolic-associated fatty liver disease]. [PDF]

Zhonghua Gan Zang Bing Za Zhi
Zhao YQ, Wang Y, Liu JJ, You H, Zhao JJ.
europepmc   +1 more source

[A simulation study on the differences in compressive mechanical properties of Voronoi porous structures with two strut-diameter morphologies]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Men Y, Wang T, Wu M, Zhang C.
europepmc   +1 more source