Results 121 to 130 of about 1,213 (196)

Q355B钢对接接头气孔缺陷对疲劳寿命影响的试验研究与数值模拟

Jianzhu Gangjiegou Jinzhan
焊接过程常伴随着气孔、夹渣、咬边等缺陷的产生，这些缺陷在疲劳荷载作用下容易导致疲劳裂纹的产生和扩展。使用有限元软件ABAQUS结合断裂力学分析软件Franc3D，建立含气孔缺陷的对接接头有限元模型，并在应力集中最大值处植入裂纹，依据断裂力学M积分对含裂纹的模型进行数值模拟，得到了不同初始裂纹长度和焊缝宽度下裂纹尖端的应力强度因子。分析结果显示，裂纹尖端的应力强度因子对初始裂纹长度变化敏感，随长度增加而增加，而裂纹两端的应力强度因子则呈相反趋势；增加焊缝宽度可以显著降低应力强度因子，随着焊缝宽度的增加 ...
熊海江, 赵东拂, 刘育民, 郝佩远, 张菊   +4 more
doaj  

Trends in disease burden of ADHD in China from 1990 to 2019 based on GBD analysis. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Zheng N, Tang J, Duan K, Zhao J, Ren X.
europepmc   +1 more source

Analysis and projection of the disease burden of nasopharyngeal carcinoma in China based on the GBD database. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Song Y, Liu X, Zhang Y, Li H.
europepmc   +1 more source

[Analysis of disease burden and changing trends of traumatic brain injury in China, 1990-2023]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Han Y, Sun K, Pan W, Luo X.
europepmc   +1 more source

[Chinese expert consensus on the diagnosis and treatment of human immunodeficiency virus infection related diffuse large B cell lymphoma (2025)]. [PDF]

Zhonghua Xue Ye Xue Za Zhi
Lymphoid Disease Group, Chinese Society of Hematology, Chinese Medical Association, Lymphoma Integrative Rehabilitation Professional Committee of Chinese Anti-Cancer Association (CACA), Central and Western China AIDS Lymphoma League (CALL), Lymphoma Expert Committee of Chinese Society of Clinical Oncology (CSCO).   +5 more
europepmc   +1 more source

[Effects of Multiple Lifestyle Factors on Cardiovascular Biological Aging and Their Relative Contributions]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Cai J, Zhang N, Xiang Y, Zhang H, Xiao X.   +4 more
europepmc   +1 more source

[Progress on the application of system dynamics model in the field of health management]. [PDF]

Zhejiang Da Xue Xue Bao Yi Xue Ban
Wu Q, Zhou H, Zhao B, Shao J.
europepmc   +1 more source

[Association between socioeconomic status and vision impairment among Chinese elderly]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Wei Y, Jian W.
europepmc   +1 more source

[Overexpression of lncRNA SNHG12 promotes docetaxel resistance of prostate cancer cells by activating PI3K/AKT signaling <i>via</i> interacting with ELAVL1]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Zhao C, Li W, Zheng B, Wang G, Xiao Z, Li Y.   +5 more
europepmc   +1 more source

[Controllability and predictability of riboflavin-ultraviolet A collagen cross-linking: advances in experimental techniques and theoretical research]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Liu X, Li X, Chen W.
europepmc   +1 more source