Results 111 to 120 of about 1,050 (155)

[Application of internal brace ligament augmentation technology in repair and reconstruction of cruciate ligament injuries]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Yang H, Shi Z, Ruan Z, Li K, Zhang M, Li Y.   +5 more
europepmc   +1 more source

新型喷头式节点抗弯性能及其幂函数模型研究

Jianzhu Gangjiegou Jinzhan
传统碗式节点作为一种典型装配式节点，常应用于大跨度空间网格结构，但因其抗弯刚度较小，使其应用范围受限。基于此，对传统碗式节点进行改进，提出了一种抗弯性能更好的喷头式节点。首先，对喷头式节点进行设计，并对喷头式节点与碗式节点进行了纯弯作用下的有限元模拟，对比了二者的抗弯性能；然后，研究了周围螺栓半径、轴向压力和轴向拉力对喷头式节点抗弯性能的影响；最后，建立了喷头式节点弯矩-转角的幂函数模型，采用模拟退火算法得到了该模型曲率系数，利用多元非线性拟合方法确定了相关的模型参数，并对幂函数模型进行了评估。结果表明，
李韧, 肖志成, 李会军, 李宝辉
doaj  

[Finite element analysis of skeletal injury mechanisms in adult standing positions with both feet landed on the ground]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Yuan H, Gao S, Wei Z.
europepmc   +1 more source

半刚接柱脚自复位装配式钢框架拟动力试验研究

Jianzhu Gangjiegou Jinzhan
为解决刚接柱脚自复位装配式钢框架结构在中震或大震下底层柱可能发生较大的塑性变形的问题，设计一种半刚接柱脚自复位装配式钢框架结构。对其子结构进行拟动力试验，对比框架在Taft波、LOS000波和EL-Centro波在不同等级地震下节点开口、耗能能力、刚度退化、预应力损失、应变变化。试验结果表明，钢框架在大震作用下具有良好的自复位功能和耗能能力。钢绞线平均预应力损失最多仅1.58%，说明施加预应力的方法是可靠的。钢框架柱脚能始终保持弹性状态，从而震后仅需修复钢梁，大大减小修复成本。
张艳霞, 沈森, 李杨龙, 赵微
doaj  

[POEMS syndrome misdiagnosed as systemic sclerosis: A case report]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Liang J, Zhang X, Yao H.
europepmc   +1 more source

[Acute megakaryoblastic leukemia with CBFA2T3::GLIS2 fusion gene: 3 cases report and literature review]. [PDF]

Zhonghua Xue Ye Xue Za Zhi
Lin S, Guo Y, Zhang L, Chen YM, Xiao JG, Cai XJ, Yang WY, Chen XJ.   +7 more
europepmc   +1 more source

[Endoscopic characteristics of primary gastric lymphoma and prediction of treatment response]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Wei J, Ye J, Zhou M, Fu W, Liu X, Zhai K, Shi Y, Ding S, Zhang J.   +8 more
europepmc   +1 more source

[<i>Qingjie Fuzheng</i> Granules alleviates 5-fluorouracil-induced skeletal muscle injury in tumor-bearing mice by inhibiting mitochondria-dependent apoptosis and activating the AMPK-PGC-1α pathway]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Zhao J, Peng J, Lin M, Zhu X, Huang B, Lin J.   +5 more
europepmc   +1 more source

[Numerical analysis research on the impact of tibial tray fixation peg structure on initial fixation stability in total knee arthroplasty]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Ling Y, Han J, Zhang Z, Peng Y, Zhang J, Chen Z, Jin Z.   +6 more
europepmc   +1 more source

[Adhesive property and flexural strength of patterned microstructured zirconia posts fabricated by 3D printing]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Jiang Q, Yin L.
europepmc   +1 more source