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Damage detection in beam-like structures using static shear energy redistribution
《结构与土木工程前沿(英文)》 2022年 第16卷 第12期 页码 1552-1564 doi: 10.1007/s11709-022-0903-4
关键词: damage detection beam structure strain energy static displacement variation energy damage index
CHEN Zhihua, YAN Xiangyu, SUN Ruirui, FENG Zhenchang, QIN Yali, ZHAO Jianbo
《结构与土木工程前沿(英文)》 2007年 第1卷 第3期 页码 286-292 doi: 10.1007/s11709-007-0037-8
Finding buckling points for nonlinear structures by dynamic relaxation scheme
Mohammad REZAIEE-PAJAND, Hossein ESTIRI
《结构与土木工程前沿(英文)》 2020年 第14卷 第1期 页码 23-61 doi: 10.1007/s11709-019-0549-z
关键词: load factor external work dynamic relaxation static equilibrium path large displacement
滕斌,郝春玲,韩凌
《中国工程科学》 2005年 第7卷 第1期 页码 21-26
依据水流作用下锚链的数值分析模型,提出了应用Chebyshev多项式拟合建立锚链张力与锚链顶端位置函数关系的近似方法,该锚链函数多项式可方便地用于波浪与锚泊结构物相互作用的实时模拟中。计算中按静水和有流两种情况,应用二维和三维Chebyshev多项式,建立了锚链顶端水平和垂向拉力与锚链顶端水平、垂向位置,及水流速度的函数关系。锚链分析模型采用分段外推-校正方法计算,在无流、均质锚链情况下,计算结果与解析解完全吻合。
关键词: 锚链张力 锚链位移 Chebyshev多项式
Temperature variation of concrete box girder bridge
Jian WANG, Zhi FANG,
《结构与土木工程前沿(英文)》 2009年 第3卷 第4期 页码 407-413 doi: 10.1007/s11709-009-0053-y
Assessment of liver volume variation to evaluate liver function
null
《医学前沿(英文)》 2012年 第6卷 第4期 页码 421-427 doi: 10.1007/s11684-012-0223-5
In order to assess the value of liver volumetry in cirrhosis and acute liver failure (ALF) patients, we explored the correlation between hepatic volume and severity of the hepatic diseases. The clinical data of 48 cirrhosis patients with 60 normal controls and 39 ALF patients were collected. Computed tomography-derived liver volume (CTLV) and body surface area (BSA) of normal controls were calculated to get a regression formula for standard liver volume (SLV) and BSA. Then CTLV and SLV of all patients were calculated and grouped by Child-Turcotte-Pugh classification for cirrhosis patients and assigned according to prognosis of ALF patients for further comparison. It turned out that the mean liver volume of the control group was 1 058±337 cm3. SLV was correlated with BSA according to the regression formula. The hepatic volume of cirrhosis patients in Child A, B level was not reduced, but in Child C level it was significantly reduced with the lowest liver volume index (CTLV/SLV). Likewise, in the death group of ALF patients, the volume index was significantly lower than that of the survival group. Based on volumetric study, we proposed an ROC (receiver operating characteristic) analysis to predict the prognosis of ALF patients that CTLV/SLV<83.9% indicates a poor prognosis. In conclusion, the CTLV/SLV ratio, which reflects liver volume variations, correlates well with the liver function and progression of cirrhosis and ALF. It is also a very useful marker for predicting the prognosis of ALF.
关键词: liver volume variation cirrhosis acute liver failure (ALF)
Lateral displacement of soft ground under vacuum pressure and surcharge load
Chin-Yee ONG, Jin-Chun CHAI
《结构与土木工程前沿(英文)》 2011年 第5卷 第2期 页码 239-248 doi: 10.1007/s11709-011-0110-1
关键词: vacuum consolidation lateral displacement PVD finite element analysis surcharge load
《结构与土木工程前沿(英文)》 doi: 10.1007/s11709-023-0966-x
关键词: anti-fault effect engineering measures LRAF method stress and displacement field tunnel-crossing active faults
Static balancing of planar articulated robots
Giuseppe QUAGLIA,Zhe YIN
《机械工程前沿(英文)》 2015年 第10卷 第4期 页码 326-343 doi: 10.1007/s11465-015-0355-9
Static balancing for a manipulator’s weight is necessary in terms of energy saving and performance improvement. This paper proposes a method to design balancing devices for articulated robots in industry, based on robotic dynamics. Full design details for the balancing system using springs are presented from two aspects: One is the optimization for the position of the balancing system; the other is the design of the spring parameters. As examples, two feasible balancing devices are proposed, based on different robotic structures: The first solution consists of linkages and springs; the other consists of pulleys, cross mechanisms and (hydro-) pneumatic springs. Then the two solutions are compared. Pneumatic, hydro-pneumatic and mechanical springs are discussed and their parameters are decided according to the requirements of torque compensation. Numerical results show that with the proper design using the methodology presented in this paper, an articulated robot can be statically balanced perfectly in all configurations. This paper therefore provides a design method of the balancing system for other similar structures.
关键词: robotics static balancing pneumatic spring mechanical spring torque compensation
Quality control based on electrode displacement and force in resistance spot welding
Chuntao JI, Lipeng DENG
《机械工程前沿(英文)》 2010年 第5卷 第4期 页码 412-417 doi: 10.1007/s11465-010-0114-x
关键词: aluminum electrode displacement electrode force nugget size data acquisition
王渭源
《中国工程科学》 2001年 第3卷 第8期 页码 29-32
当前,工程师和科学家都对微牛和纳牛量级载荷静摩擦系数(以下简称微牛纳牛静摩擦系数)很感兴趣。但文献中至今没有详细讨论过微牛纳牛静摩擦系数与载荷的关系,而且发表的实验结果都不相互讨论。从微分静摩擦系数的定义出发,导出几种典型模型下微分静摩擦系数和表观静摩擦系数的表式,并据此广泛讨论这些文献中的实验结果。
ZHAN Rong, YU Qinghong, HUANG Haobo
《医学前沿(英文)》 2008年 第2卷 第4期 页码 356-360 doi: 10.1007/s11684-008-0068-0
关键词: VEGF expression expression variation culture supernatant labeling concentration
Distribution of background equivalent static wind load on high-rise buildings
Jianguo ZHANG , Ming GU ,
《结构与土木工程前沿(英文)》 2009年 第3卷 第3期 页码 241-248 doi: 10.1007/s11709-009-0036-z
关键词: high-rise buildings along-wind cross-wind background equivalent static wind load close formulae
Temporal variation of heavy metal pollution in urban stormwater runoff
Wen LI, Zhenyao SHEN, Tian TIAN, Ruimin LIU, Jiali QIU
《环境科学与工程前沿(英文)》 2012年 第6卷 第5期 页码 692-700 doi: 10.1007/s11783-012-0444-5
关键词: urban stormwater heavy metal pollution temporal variation event mean concentration first flush effect redundancy analysis
Full-field dynamic strain reconstruction of an aero-engine blade from limited displacement responses
《机械工程前沿(英文)》 2023年 第18卷 第1期 doi: 10.1007/s11465-022-0731-1
关键词: aero-engine blade displacement response dynamic strain reconstruction mode shape strain gauge
标题 作者 时间 类型 操作
Theoretical analysis and actual experimental research on static characteristics of suspendome structure
CHEN Zhihua, YAN Xiangyu, SUN Ruirui, FENG Zhenchang, QIN Yali, ZHAO Jianbo
期刊论文
Finding buckling points for nonlinear structures by dynamic relaxation scheme
Mohammad REZAIEE-PAJAND, Hossein ESTIRI
期刊论文
Lateral displacement of soft ground under vacuum pressure and surcharge load
Chin-Yee ONG, Jin-Chun CHAI
期刊论文
Influence of advanced engineering measures on displacement and stress field of surrounding rock in tunnels
期刊论文
Quality control based on electrode displacement and force in resistance spot welding
Chuntao JI, Lipeng DENG
期刊论文
arsenic trioxide on proliferation and apoptosis of U266 cells and its relationship with the expression variation
ZHAN Rong, YU Qinghong, HUANG Haobo
期刊论文
Distribution of background equivalent static wind load on high-rise buildings
Jianguo ZHANG , Ming GU ,
期刊论文
Temporal variation of heavy metal pollution in urban stormwater runoff
Wen LI, Zhenyao SHEN, Tian TIAN, Ruimin LIU, Jiali QIU
期刊论文