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Jianzhu Gangjiegou Jinzhan为揭示偏心竖向荷载作用下薄壁箱梁的畸变，基于能量变分原理和箱梁各板件的静力平衡分析，给出优化后箱梁畸变研究的3种方法。推导出各方法研究梯形截面箱梁畸变解析计算式的普遍形式，得到相应的四阶畸变控制微分方程。对各畸变研究方法采用典型数值算例进行验证，研究结果表明：优化后的各畸变研究方法计算的畸变翘曲正应力值与文献数值相差很小，各方法之间误差最大不超过5.39%，方法2和方法3计算结果误差很小可忽略；各方法计算的矩形截面箱梁的畸变扇性坐标值均相等，梯形截面箱梁的畸变扇性坐标值则不同 ...
王兆南, 张元海
doaj +2 more sources
Zhongshan Daxue xuebao. Yixue kexue ban, 2000 【目的】观察幽门螺杆菌形态变化及生长特性;探讨改良布氏肉汤对幽门螺杆菌的作用。【方法】光镜下观察冻 存及培养于哥伦比亚平板上的菌株在暴露于空气中不同时间段的形态变化;在暴露于空气后不同的时间段将菌株分别经改 良布氏肉汤及哥伦比亚平板进行传代培养。【结果】暴露于空气中冻存菌株0.7 h 后失去生长能力, 0.8 h 开始出现球形菌, 66.5 h 全部球形样变;平板上菌株于1.9 h 开始出现球形菌, 8.2 h 后失去生长能力, 33.2 h 全部球形样变, 84.3 h 后完全失去尿 素酶活性;
何 瑶
doaj
[A Review of Archaeological Studies on Dento-maxillofacial Deformities]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue BanLuo G, Deng D, Zhou J, Zhou C.
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Earth Science-Journal of China University of GeosciencesYuting Yang +6 more
semanticscholar +1 more source
[Niemann-Pick disease with two missense mutations in SMPD1 gene: a case report and literature review]. [PDF]
Zhonghua Xue Ye Xue Za ZhiWei Y, Guo H, Xu JN, Chen YY, Shi HX.
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Jianzhu Gangjiegou Jinzhan为研究大跨度连续钢桁梁桥施工阶段的受力情况，对连续钢桁梁桥的竖向变形和关键节点应力进行了现场实测。依据变形协调原理，建立了节点实体与杆系相结合的多尺度数值分析模型，得到了桥梁成桥阶段的结构整体内力和局部节点受力情况，将桁杆变形和应力的实测值与有限元计算值进行了对比分析。结果表明，下弦杆竖向最大变形值小于6 cm，变形值与计算跨径之比小于1/2 300；杆件实测应力最大值为32 MPa，位于E8节点下弦杆附近。最大变形值和应力值均满足设计规定要求。下弦杆竖向变形实测值与计算值变化趋势基本一致 ...
安鹏, 王文炜
doaj
[Interpretation of the Expert Consensus for Full Course Management of Plexiform Neurofibroma (2025 Edition)]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiGroup Of Neurofibromatosis Plastic And Reconstructive Surgery Society Of Chinese Medical Association +1 more
europepmc +1 more source
[Progress in diagnosis and treatment of finger flexion deformity caused by forearm flexor muscle lesions]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiJiang Y, Wei J.
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[A case report of Diets-Jongmans syndrome caused by a <i>KDM3B</i> gene variant]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiShen KX +4 more
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