Results 31 to 40 of about 387 (105)
Zhongguo cuzhong zazhi, 2018 背景 偏头痛与右向左分流（right-to-left shunt，RLS）的关系尚有争议。本研究旨在明确中国偏头痛 患者右向左分流的阳性率、分流类型以及分流量大小，分析偏头痛与右向左分流的关系。 方法 该研究为多中心-病例对照研究（北美临床研究注册号NCT0242569)。由中国9家分中心共同完 成，连续纳入2015年6月-2016年8月就诊于分中心且符合据第三版国际头痛疾病分类-β测试版（The International Classification of Headache Disorders ...
王思博，刘亢丁，杨弋，李雅杰，胡鸣一，林攀，郭蓉，田茜，游咏，崔英花，张观玲，董钊，高永生，邢英琦 1130021 长春吉林大学第一医院神经内科和神经科学中心
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Torsional Earthquake Response of Coupled Reinforced Concrete Frames by Personal Computer-Actuator On-Line System [PDF]
, 1986 In 1984 the authers produced a torsional earthquake response testing system in which actuators were linked to personal computer (personal computer-actuator on-line system) by way of reproducing seismic behavior of structures with eccentricity. Using this
溝口 光男 +2 more
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Jianzhu Gangjiegou Jinzhan, 2023 以螺栓群偏心距和端板厚度为研究参数，对梁柱节点中端板连接在偏心拉力作用下（A组）和纯弯矩作用下（B组）的螺栓群进行了受拉性能试验研究。通过对破坏模式、螺栓群受力分布和中和轴偏移率的分析，研究了端板连接普通螺栓群中和轴位置变化的情况；对两组试验开展有限元分析，从荷载-位移曲线和节点抗拉性能两方面进行研究。结果表明：随着荷载逐渐增大，螺栓群中和轴不断向受压区移动；增大螺栓群偏心距可使螺栓力增大，且加快中和轴向受压区偏移；增加端板厚度能够减小螺栓力，并延缓中和轴向受压区偏移 ...
王安涟 +5 more
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A Study on the Effects which Eccentricity of Damping Characteristics affects Torsional Vibration of the Building having Eccentricity of Stiffness [PDF]
, 2001 Torsional vibration arises when building has eccentricity of stiffness. For the method that cancels this torsional vibration, damping device is included on flexible side element. Increasing of damping factor on flexible side element, damping factor which
中村, 満喜男
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Identification of Astronomical Cycles in Upper Cretaceous Sifangtai Formation and Constraints on Depositional Age of Uranium Mineralized Sandstones in Qian’an Area of Songliao Basin [PDF]
Cyclostratigraphy is widely applied in establishing high-precision sequence stratigraphic frameworks and astronomical time scales, making it an important field in the quantitative study of sedimentology.
WANG Junxian1, 2, , LI Ziying1, 2, , XING Zuochang1, 2, LIU Jungang1, 2, SHI Qingping1, 2, TIAN Mingming1, 2, JIA Licheng1, 2
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Jianzhu Gangjiegou Jinzhan, 2018 完成了14根矩形不锈钢管混凝土柱在双向偏压下的试验研究,试验考察的主要参数为:荷载偏心率、混凝土强度和试件长度。试验结果表明:在双向偏心受压荷载作用下,矩形不锈钢管混凝土柱具有良好的延性;荷载偏心率、混凝土强度和试件长度对矩形不锈钢管混凝土双向偏压试件的承载力和延性都有着明显的影响,跨中截面的应变变化符合平截面假定。采用现有《钢管混凝土结构技术规程》(DBJ/T 13—51—2010)中的钢管混凝土双向压弯相关方程对试验构件的极限承载力进行了计算,其结果和试验值吻合较好。
李永进, 廖飞宇, 黄海清
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Relations between Superstructure-Score in the Earthquake-Proof Diagnosis and the Amount of Structural Walls of the Existing Wooden Houses against the Construction Year [PDF]
, 2013 application/pdfIn this study, the earthquake-resistant diagnosis scores of 43 existing wooden houses and the relations with the construction year are examined. The main results are as follows: positive correlation is recognized between the superstructure
Iwai, Satoshi +5 more
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Analysis of Influence of Shear Flow of Lubricating Oil on Unstable Vibration of Generator Unit [PDF]
In order to study the unstable vibration of generator unit in nuclear power plant, a rotor dynamics analysis model was established, in which the thermal effect induced by oil shear flow in bearing was considered.
LI Zhen1, , YANG Jiangang2, CHEN Huihui1, HE Mingyuan1, WANG Hongkai1
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Zhendong Ceshi yu Zhenduan针对振动作用下发电机绕组绝缘断裂损伤机理与偏心故障影响机制尚未明确的问题，提出考虑静态偏心故障的绕组绝缘损伤分析方法。首先，建立理论模型，对偏心前后的绕组电磁力与绝缘断裂情况进行解析；其次，构建有限元分析模型并进行电磁场分析，验证偏心前后的电磁力分布、幅值及频率变化；然后，进行结构场仿真，揭示绝缘应力分布与裂纹扩展情况；最后，通过实验来验证理论模型与有限元分析结果。结果表明：在正常情况下，各绕组所受电磁力基本相同；发生偏心故障后，气隙减小（增大）处绕组电磁力增大（减小 ...
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