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Experimental study of the restoring force mechanism in the self-centering beam (SCB)
Abhilasha MAURYA,Matthew R. EATHERTON
《结构与土木工程前沿(英文)》 2016年 第10卷 第3期 页码 272-282 doi: 10.1007/s11709-016-0346-x
关键词: self-centering seismic system seismic design hysteretic behavior restoring force resilient structural system
许斌,贺佳
《中国工程科学》 2011年 第13卷 第9期 页码 76-82
提出一种完全基于激励和结构响应实测数据的结构动力系统非线性恢复力识别方法,并通过在一个4层钢结构模型中引入具有非线性特性的磁流变阻尼器(MR)模拟非线性恢复力,基于此模型结构在不同的激励方式下的动力响应测量数据,验证了该方法的有效性。对于结构的各自由度均受到激励的情况,运用最小二乘拟合算法识别出等效线性系统的物理参数(质量、刚度和阻尼矩阵),进而得到模型结构振动过程中MR阻尼力随时间变化情况并与实验实测结果进行了比较。针对结构仅在有限自由度上受到激励的情况,对以上方法进行了改进,提出了一种非线性系统恢复力的非参数化识别方法,利用结构中弹性恢复力的对称关系,分步确定了结构各层间恢复力模型,从而得到MR恢复力的大小并与实测结果进行了比较。结果表明,基于时域实测信号的非线性系统恢复力识别法在完整激励和非完整激励下均能有效地识别结构的非线性恢复力特性。文章所述方法可以运用于工程结构在动力荷载作用下的损伤发生发展过程的监测与识别。
null
《医学前沿(英文)》 2013年 第7卷 第3期 页码 301-305 doi: 10.1007/s11684-013-0283-1
Systemic inflammatory response following myocardial ischemia-reperfusion injury (IRI) to a specific organ may cause injuries. Ischemic post-conditioning (IPostC) has emerged as a promising method for myocardial protection against IRI both in experimental and in clinical settings. Enhancement of endogenous nitric oxide (NO) is one of the major mechanisms by which IPostC confers cardioprotection. However, the sensitivity of the diabetic heart to IPostC is impaired and the underlying mechanism is unknown. Adiponectin (APN) is an adipocyte-derived plasma protein with anti-diabetic and anti-inflammatory properties. Plasma levels of APN are decreased in obese subjects and in patients with type 2 diabetes. APN supplementation has been shown to increase NO production and attenuate myocardial IRI in normal (non-diabetic) animals. However, the effect of APN on myocardial injury in diabetic subjects, especially its potential in restoring the sensitivity of the diabetic heart to IPostC has not been investigated. In the current paper, we discussed the possible reasons why the myocardium of diabetic subjects loses sensitivity to IPostC and also highlighted the potential effectiveness and mechanism of APN in restoring IPostC cardioprotection in diabetes. This review proposes to conduct studies that may facilitate the development of novel and optimal therapies to enhance cardioprotection in patients with severe diseases such as diabetes.
关键词: adiponectin ischemic post-conditioning ischemia reperfusion injury diabetes
Modeling limit force capacities of high force to volume lead extrusion dampers
《结构与土木工程前沿(英文)》 2021年 第15卷 第3期 页码 609-622 doi: 10.1007/s11709-021-0724-x
关键词: extrusion lead dampers upper and lower bound analytical modelling limit force
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
Visualization of force networks in 2D dense granular materials
Jianguo LIU, Qicheng SUN, Feng JIN,
《结构与土木工程前沿(英文)》 2010年 第4卷 第1期 页码 109-115 doi: 10.1007/s11709-010-0003-8
Motion/force transmission indices of parallel manipulators
Xinjun LIU, Chao WU, Fugui XIE
《机械工程前沿(英文)》 2011年 第6卷 第1期 页码 89-91 doi: 10.1007/s11465-011-0215-1
Applications of atomic force microscopy in immunology
Jiping Li, Yuying Liu, Yidong Yuan, Bo Huang
《医学前沿(英文)》 2021年 第15卷 第1期 页码 43-52 doi: 10.1007/s11684-020-0769-6
关键词: cellular mechanics atomic force microscopy neutrophil extracellular trap macrophage phagocytosis pore formation
Non-convex sparse optimization-based impact force identification with limited vibration measurements
《机械工程前沿(英文)》 2023年 第18卷 第3期 doi: 10.1007/s11465-023-0762-2
关键词: impact force identification inverse problem sparse regularization under-determined condition alternating direction method of multipliers
Qi XIA,Tao ZHOU,Michael Yu WANG,Tielin SHI
《机械工程前沿(英文)》 2014年 第9卷 第1期 页码 50-57 doi: 10.1007/s11465-014-0286-x
In an operation mode of atomic force microscopy that uses a higher eigenmode to determine the physical properties of material surface, the ratio between the eigenfrequency of a higher flexural eigenmode and that of the first flexural eigenmode was identified as an important parameter that affects the sensitivity and accessibility. Structure features such as cut-out are often used to tune the ratio of eigenfrequencies and to enhance the performance. However, there lacks a systematic and automatic method for tailoring the ratio. In order to deal with this issue, a shape and topology optimization problem is formulated, where the ratio between two eigenfrequencies is defined as a constraint and the area of the cantilever is maximized. The optimization problem is solved via the level set based method.
关键词: atomic force microscopy cantilever probe eigenfrequency optimization
Xudong WANG,Miao ZHOU,Xiaorong MENG,Lei WANG,Danxi HUANG
《环境科学与工程前沿(英文)》 2016年 第10卷 第4期 doi: 10.1007/s11783-016-0855-9
关键词: PVDF membrane Membrane fouling Adhesion force Protein Interfacial free energy
Nonlinear sealing force of a seawater balance valve used in an 11000-meter manned submersible
《机械工程前沿(英文)》 2023年 第18卷 第1期 doi: 10.1007/s11465-022-0726-y
关键词: seawater balance valve sealing performance hybrid ANE model FEM minimum sealing force equation
《机械工程前沿(英文)》 2023年 第18卷 第2期 doi: 10.1007/s11465-023-0747-1
关键词: micro-electro-mechanical system capacitive sensor bionics operation instability mechanical and electrical decoupling biomedical force measurement
《机械工程前沿(英文)》 2023年 第18卷 第1期 doi: 10.1007/s11465-022-0720-4
关键词: milling force nanofluid minimum quantity lubrication aerospace aluminum alloy nano biological lubricant
Cutting Force Model for a Small-diameter Helical Milling Cutter
LI Xiwen, YANG Shuzi, YANG Mingjin, XIE Shouyong
《机械工程前沿(英文)》 2007年 第2卷 第3期 页码 272-277 doi: 10.1007/s11465-007-0047-1
关键词: computational corresponding helical milling theoretical foundation Characteristic
标题 作者 时间 类型 操作
Experimental study of the restoring force mechanism in the self-centering beam (SCB)
Abhilasha MAURYA,Matthew R. EATHERTON
期刊论文
Adiponectin: mechanisms and new therapeutic approaches for restoring diabetic heart sensitivity to ischemic
null
期刊论文
Quality control based on electrode displacement and force in resistance spot welding
Chuntao JI, Lipeng DENG
期刊论文
Visualization of force networks in 2D dense granular materials
Jianguo LIU, Qicheng SUN, Feng JIN,
期刊论文
Applications of atomic force microscopy in immunology
Jiping Li, Yuying Liu, Yidong Yuan, Bo Huang
期刊论文
Non-convex sparse optimization-based impact force identification with limited vibration measurements
期刊论文
Shape and topology optimization for tailoring the ratio between two flexural eigenfrequencies of atomic force
Qi XIA,Tao ZHOU,Michael Yu WANG,Tielin SHI
期刊论文
on PVDF ultrafiltration membrane fouling behavior under different pH conditions: interface adhesion force
Xudong WANG,Miao ZHOU,Xiaorong MENG,Lei WANG,Danxi HUANG
期刊论文
bionic approach for the mechanical and electrical decoupling of an MEMS capacitive sensor in ultralow force
期刊论文
Mechanical behavior and semiempirical force model of aerospace aluminum alloy milling using nano biological
期刊论文