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Non-convex sparse optimization-based impact force identification with limited vibration measurements

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 3, doi: 10.1007/s11465-023-0762-2

Abstract: When solving the under-determined problem, Keywords： impact force identification     inverse problem     sparse regularization     under-determined condition     alternating    

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A dynamic stiffness-based framework for harmonic input estimation and response reconstruction considering damage

Yixian LI; Limin SUN; Wang ZHU; Wei ZHANG

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 4,   Pages 448-460 doi: 10.1007/s11709-022-0805-5

Abstract: converts the dynamic equilibrium equation to an equivalent static one in the frequency domain, which is under-determinedThe principal component analysis has been adopted to “compress” the under-determined equation, and formedan over-determined equation to estimate the unknown input.

Keywords： dynamic stiffness     principal component analysis     response reconstruction     damage localization     under-determined    

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Data recovery with sub-Nyquist sampling: fundamental limit and a detection algorithm

Xiqian Luo, Zhaoyang Zhang,ning_ming@zju.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 2,   Pages 141-286 doi: 10.1631/FITEE.1900320

Abstract: no information loss, the sub-Nyquist rate may also be sufficient for sampling and recovering signals under

Keywords： Nyquist-Shannon sampling theorem     Sub-Nyquist sampling     Minimum Euclidean distance     Under-determined    

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Sufficient or insufficient: Assessment of the intended nationally determined contributions (INDCs) of

Ge GAO, Mo CHEN, Jiayu WANG, Kexin YANG, Yujiao XIAN, Xunpeng SHI, Ke WANG

Frontiers of Engineering Management 2019, Volume 6, Issue 1,   Pages 19-37 doi: 10.1007/s42524-019-0007-6

Abstract: Nations Framework Convention on Climate Change has resulted in the submission of the Intended Nationally Determined

Keywords： Intended Nationally Determined Contributions     mitigation     responsibility     capacity     potential    

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Influence of site conditions on seismic design parameters for foundations as determined via nonlinear

Muhammad Tariq A. CHAUDHARY

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1,   Pages 275-303 doi: 10.1007/s11709-021-0685-0

Abstract: Site conditions, including geotechnical properties and the geological setting, influence the near-surface response of strata subjected to seismic excitation. The geotechnical parameters required for the design of foundations include mass density ( ), damping ratio ( ), shear wave velocity ( ), and soil shear modulus ( ). The values of the last three parameters are sensitive to the level of nonlinear strain induced in the strata due to seismic ground motion. In this study, the effect of variations in soil properties, such as plasticity index ( ), effective stress ( ), over consolidation ratio (OCR), impedance contrast ratio ( ) between the bedrock and the overlying strata, and depth of soil strata over bedrock ( ), on seismic design parameters ( , , and ) was investigated for National Earthquake Hazards Reduction Program (NEHRP) site classes C and D, through 1D nonlinear seismic site response analysis. The Morris one-at-a-time (OAT) sensitivity analysis indicated that , , and were significantly influenced by variations in , while affected more than it affected and . However, the influence of on these parameters was less significant. It was also found that variations in soil properties influenced seismic design parameters in soil type D more significantly than in soil type C. Predictive relationships for , , and were derived based on the 1D seismic site response analysis and sensitivity analysis results. The , , and values obtained from the analysis were compared with the corresponding values in NEHRP to determine the similarities and differences between the two sets of values. The need to incorporate and in the metrics for determining , , and for the seismic design of foundations was highlighted.

Keywords： site effects     1D seismic site response analysis     sensitivity analysis     foundations     shear wave velocity     soil shear modulus    

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China’s pre-2020 CO

Hailin WANG

Frontiers in Energy 2019, Volume 13, Issue 3,   Pages 571-578 doi: 10.1007/s11708-019-0640-0

Abstract: and simulates the decrease of CO intensity of GDP in 2020 and its influences on achieving National Determined

Keywords： China’s National Determined Contribution     emission reduction potential     scenario analysis     CO2   

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Situation and measures of China’s CO

Jiankun HE

Frontiers in Energy 2018, Volume 12, Issue 3,   Pages 353-361 doi: 10.1007/s11708-018-0564-0

Abstract: Currently, under the new economic normal, China further strengthens the policy measure, vigorously saves

Keywords： climate change     the Paris Agreement     energy revolution     NDC (national determined contribution) goals    

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Feature extraction from slice data for reverse engineering

ZHANG Yingjie, LU Shangning

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 1,   Pages 25-31 doi: 10.1007/s11465-007-0004-z

Abstract: The curve fitting methods are applied for each curve segment to remove the unwanted points with pre-determined

Keywords： feasibility     corresponding     B-spline     pre-determined tolerance     extraction    

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Personal Viewpoint on the Self-determined Innovation of Modern Science and Technology in Relationship

Li Shihui

Strategic Study of CAE 2005, Volume 7, Issue 4,   Pages 11-21

Abstract: and Western culture each other, this paper briefly studies some typical examples about original self-determineddemonstrate with practical examples that the traditional Chinese culture plays a great role on the self-determined

Keywords： Chinese traditional culture     Western culture     complement each other     self-determined innovation of science    

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A rank-based multiple-choice secretary algorithm for minimising microgrid operating cost under uncertainties

Frontiers in Energy 2023, Volume 17, Issue 2,   Pages 198-210 doi: 10.1007/s11708-023-0874-8

Abstract: variables or accurate predictive approaches, a lightweight solution was used to make real-time decisions undermicrogrid to reduce the operating cost by determining the best electricity purchase timing for each task under

Keywords： energy management systems     demand response     scheduling under uncertainty     renewable energy sources     multiple-choice    

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Hazard potential of zones of weakness in gravity dams under impact loading conditions

Herbert LINSBAUER

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1,   Pages 90-97 doi: 10.1007/s11709-010-0008-3

Abstract: Dam constructions worldwide are designed and constructed in view of the strictest safety aspects for all static and dynamic load cases. As experience shows, however, formation of cracks in the “homogeneos concrete” as well as unsatisfactory compound behavior of lift joints are not to be excluded. These zones of weakness especially on the upstream side of the dam— exposed to high water pressure (static and dynamic)— represent an increased risk of safety. The main investigation, apart from the computation of the dynamic effects on the dam as a global structure, focuses on the stability analysis of a pressure-water filled crack configuration subjected to “dynamic loading” in the form of seismic action on the dam-reservoir-system and alternatively by “impact spot-loading” within sectors of the reservoir. A fracture mechanics based analysis shows an excessive potential of damage for the afflicted structure.

Keywords： dam-reservoir     earthquake     impact     cracking     fracture mechanics    

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Evaluating the material strength from fracture angle under uniaxial loading

Jitang FAN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 288-293 doi: 10.1007/s11709-018-0480-8

Abstract: Shearing fracture angle is smaller than 45° under uniaxial compression and greater than 45° under uniaxialIn this work, a unified relation of material strength under uniaxial compression and tension is developed

Keywords： strength     fracture     mechanics    

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Deformation control criterion of shield tunnel under lateral relaxation of soft soil

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 5,   Pages 780-795 doi: 10.1007/s11709-023-0944-3

Abstract: Metro shield tunnels under the lateral relaxation of soil (LRS) are susceptible to significant lateralFor a shield tunnel with a diameter of approximately 6 m and under the lateral relaxation of sandy soil

Keywords： shield tunnel     lateral relaxation of soil     deformation control criterion of segment structure     model test    

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Analysis of suitable geometrical parameters for designing a tendon-driven under-actuated mechanical finger

Francesco PENTA,Cesare ROSSI,Sergio SAVINO

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 2,   Pages 184-194 doi: 10.1007/s11465-016-0385-y

Abstract:

This study aims to optimize the geometrical parameters of an under-actuated mechanical finger by conducting

Keywords： tendon-driven fingers     mechanical finger design     under-actuated mechanical systems    

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Erratum to: Bending and vibration of a discontinuous beam with a curvic coupling under different axial

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-022-0709-z

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Title Author Date Type Operation

Non-convex sparse optimization-based impact force identification with limited vibration measurements

Journal Article

A dynamic stiffness-based framework for harmonic input estimation and response reconstruction considering damage

Yixian LI; Limin SUN; Wang ZHU; Wei ZHANG

Journal Article

Data recovery with sub-Nyquist sampling: fundamental limit and a detection algorithm

Xiqian Luo, Zhaoyang Zhang,ning_ming@zju.edu.cn

Journal Article

Sufficient or insufficient: Assessment of the intended nationally determined contributions (INDCs) of

Ge GAO, Mo CHEN, Jiayu WANG, Kexin YANG, Yujiao XIAN, Xunpeng SHI, Ke WANG

Journal Article

Influence of site conditions on seismic design parameters for foundations as determined via nonlinear

Muhammad Tariq A. CHAUDHARY

Journal Article

China’s pre-2020 CO

Hailin WANG

Journal Article

Situation and measures of China’s CO

Jiankun HE

Journal Article

Feature extraction from slice data for reverse engineering

ZHANG Yingjie, LU Shangning

Journal Article

Personal Viewpoint on the Self-determined Innovation of Modern Science and Technology in Relationship

Li Shihui

Journal Article

A rank-based multiple-choice secretary algorithm for minimising microgrid operating cost under uncertainties

Journal Article

Hazard potential of zones of weakness in gravity dams under impact loading conditions

Herbert LINSBAUER

Journal Article

Evaluating the material strength from fracture angle under uniaxial loading

Jitang FAN

Journal Article

Deformation control criterion of shield tunnel under lateral relaxation of soft soil

Journal Article

Analysis of suitable geometrical parameters for designing a tendon-driven under-actuated mechanical finger

Francesco PENTA,Cesare ROSSI,Sergio SAVINO

Journal Article

Erratum to: Bending and vibration of a discontinuous beam with a curvic coupling under different axial

Journal Article