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Parameter estimation in exponential models by linear and nonlinear fitting methods Article

Ping YANG,Chao-peng WU,Yi-lu GUO,Hong-bo LIU,Hui HUANG,Hang-zhou WANG,Shu-yue ZHAN,Bang-yi TAO,Quan-quan MU,Qiang WANG,Hong SONG

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 3,   Pages 434-444 doi: 10.1631/FITEE.1601683

Abstract: Estimation of unknown parameters in exponential models by linear and nonlinear fitting methods is discussedNumerical simulation is performed to compare the performance of the linear and nonlinear fitting methodsthat the linear method can obtain only a suboptimal estimate of the unknown parameters and that the nonlinearand imaging distances, which supports the improvement in the accuracy of parameter estimation by the nonlinearfitting method.

Keywords： Exponential model     Parameter estimation     Linear least squares     Nonlinear fitting    

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3D interpolation-approximation fitting construction method for complex geological surfaces

Li Mingchao,Miao Zhengjian,Liu Fei,Wang Gang

Strategic Study of CAE 2011, Volume 13, Issue 12,   Pages 103-107

Abstract:

Based on multi-source data, a fitting geological surface is requiredFor the discrete data in the peripheral region, NURBS approximation fitting method is used to construct

Keywords： geological surface     interpolation-approximation fitting     3D construction     multi-source geological data    

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Separation mechanism for double cylinder with shrink fitting system used for ceramics conveying rollers

Wenbin LI, Hiromasa SAKAI, Shota HARADA, Yasushi TAKASE, Nao-Aki NODA

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3,   Pages 277-286 doi: 10.1007/s11465-011-0234-y

Abstract: structure was considered which has a ceramics sleeve connected with two steel shafts at both ends by shrink fittingfive times larger than that of ceramics, it is necessary to investigate how to separate the shrink fitting

Keywords： contact     ceramics     thermal stress     heating     finite element method    

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Fitting on the Earth: Challenges of Carbon and Nitrogen Cycle to Preserve the Habitability of the Planet Views & Comments

Robert Socolow

Engineering 2016, Volume 2, Issue 1,   Pages 21-22 doi: 10.1016/J.ENG.2016.01.012

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Investigating peak stresses in fitting and repair patches of buried polyethylene gas pipes

Reza KHADEMI ZAHEDI, Pouyan ALIMOURI, Hooman KHADEMI ZAHEDI, Mohammad SHISHESAZ

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1,   Pages 147-168 doi: 10.1007/s11709-019-0587-6

Abstract: According to the results, the peak stress values take place in the middle of the fitting and at its internalThe maximum stress values in fitting and pipe are below the allowable stresses which shows the properuse of introduced fitting is applicable even in hot climate areas of Ahvaz, Iran.

Keywords： Ansys software     polyethylene     buried pipelines     polyethylene joints     polyethylene patches     peak von Mises stress     soil-pipe interaction     temperature variation    

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New nonlinear stiffness actuator with predefined torque‒deflection profile

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0721-3

Abstract: A nonlinear stiffness actuator (NSA) could achieve high torque/force resolution in low stiffness range

Keywords： compliant actuator     nonlinear stiffness actuator     nonlinear spring     predefined torque−deflection profile    

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Mean wind load induced incompatibility in nonlinear aeroelastic simulations of bridge spans

Zhitian ZHANG

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 3,   Pages 605-617 doi: 10.1007/s11709-018-0499-x

Abstract: Mean wind response induced incompatibility and nonlinearity in bridge aerodynamics is discussed, where the mean wind and aeroelastic loads are applied simultaneously in time domain. A kind of incompatibility is found during the simultaneous simulation of the mean wind and aeroelastic loads, which leads to incorrect mean wind structural responses. It is found that the mathematic expectations (or limiting characteristics) of the aeroelastic models are fundamental to this kind of incompatibility. In this paper, two aeroelastic models are presented and discussed, one of indicial-function-denoted (IF-denoted) and another of rational-function-denoted (RF-denoted). It is shown that, in cases of low wind speeds, the IF-denoted model reflects correctly the mean wind load properties, and results in correct mean structural responses; in contrast, the RF-denoted model leads to incorrect mean responses due to its nonphysical mean properties. At very high wind speeds, however, even the IF-denoted model can lead to significant deviation from the correct response due to steady aerodynamic nonlinearity. To solve the incompatibility at high wind speeds, a methodology of subtraction of pseudo-steady effects from the aeroelastic model is put forward in this work. Finally, with the method presented, aeroelastic nonlinearity resulted from the mean wind response is investigated at both moderate and high wind speeds.

Keywords： bridge     aerodynamics     nonlinear     aeroelastic model     Pseudo-steady     mean wind loads    

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General expression for linear and nonlinear time series models

Ren HUANG, Feiyun XU, Ruwen CHEN

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 1,   Pages 15-24 doi: 10.1007/s11465-009-0015-z

Abstract: However, some nonlinear factors are within the practical system; thus, it is difficult to fit the modelThis paper proposes a general expression for linear and nonlinear auto-regressive time series modelsexperiments show that the GNAR model can accurately approximate to the dynamic characteristics of the most nonlinear

Keywords： linear and nonlinear     autoregressive model     system identification     time series analysis    

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Evaluation of transmissibility for a class of nonlinear passive vibration isolators

Z. K. PENG, Z. Q. LANG, G. MENG

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 4,   Pages 401-409 doi: 10.1007/s11465-012-0349-9

Abstract: concept of Output Frequency Response Functions (OFRFs) is applied to represent the transmissibility of nonlinearcharacteristic parameters is derived for a wide class of nonlinear isolators that have nonlinear anti-symmetricdamping characteristics and a comprehensive pattern about how the nonlinear damping characteristic parametersThese conclusions are of significant importance in the analysis and design of the nonlinear vibrationisolators with nonlinear anti-symmetric damping.

Keywords： nonlinear vibration     volterra series     Output Frequency Response Functions (OFRFs)     nonlinear damping     vibration    

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Uncovering the evolution of tin use in the United States and its implications

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1406-6

Abstract:

• US tin use decreases as the GDP value added by manufacturing sector increases.

Keywords： Tin use     GDP     Curve fitting     Logistic model     Gompertz model    

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Numerical analysis of nonlinear dynamic behavior of earth dams

Babak EBRAHIMIAN

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1,   Pages 24-40 doi: 10.1007/s11709-010-0082-6

Abstract: The numerical investigation employs a fully nonlinear dynamic finite difference analysis incorporating

Keywords： earth dam     numerical     nonlinear response     dynamic analysis     earthquake     dam height    

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Velocity gradient elasticity for nonlinear vibration of carbon nanotube resonators

Hamid M. SEDIGHI, Hassen M. OUAKAD

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6,   Pages 1520-1530 doi: 10.1007/s11709-020-0672-x

Abstract: this study, for the first time, we investigate the nonlocality superimposed to the size effects on the nonlineara reduced-order model based on the differential quadrature method (DQM) to discretize the governing nonlinearequation of motion and acquire a discretized-parameter nonlinear model of the system.The structural nonlinear behavior of the system assuming both strain and velocity gradient theories is

Keywords： velocity gradient elasticity theory     nanotube resonators     differential-quadrature method     nonlinear vibration    

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Combined Application of Wide-Field Electromagnetic Method and Flow Field Fitting Method for High-Resolution Article

Jishan He

Engineering 2018, Volume 4, Issue 5,   Pages 667-675 doi: 10.1016/j.eng.2018.09.006

Abstract: solve this difficult problem, a combination of the wide-field electromagnetic method and the flow field fitting

Keywords： Wide-field electromagnetic method     Flow field fitting method     Goaf     Water abundance     High-resolution exploration    

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Analytical approach to robust design of nonlinear mechanical systems

Jian ZHANG, Nengsheng BAO, Guojun ZHANG, Peihua GU

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 2,   Pages 203-214 doi: 10.1007/s11465-009-0022-0

Abstract: functional requirements, structural characteristics, design parameters and uncontrollable variables of nonlinearFor a nonlinear mechanical system, relationships among structural characteristics of the system, design

Keywords： robust     design     nonlinear    

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Analysis of statistical thermodynamic model for binary protein adsorption equilibria on cation exchange adsorbent

ZHOU Xiaopeng, SU Xueli, SUN Yan

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 2,   Pages 103-112 doi: 10.1007/s11705-007-0020-x

Abstract: A study of nonlinear competitive adsorption equilibria of proteins is of fundamental importance in understandingThis work describes the nonlinear binary protein adsorption equilibria on ion exchangers by the statisticalMoreover, the ST model gave acceptable fitting to the binary adsorption data with the fitted single-componentResults demonstrate the availability of the ST model for describing nonlinear competitive protein adsorption

Keywords： fundamental importance     single-component equilibria     acceptable fitting     hemoglobin     chromatographic separation    

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Title Author Date Type Operation

Parameter estimation in exponential models by linear and nonlinear fitting methods

Ping YANG,Chao-peng WU,Yi-lu GUO,Hong-bo LIU,Hui HUANG,Hang-zhou WANG,Shu-yue ZHAN,Bang-yi TAO,Quan-quan MU,Qiang WANG,Hong SONG

Journal Article

3D interpolation-approximation fitting construction method for complex geological surfaces

Li Mingchao,Miao Zhengjian,Liu Fei,Wang Gang

Journal Article

Separation mechanism for double cylinder with shrink fitting system used for ceramics conveying rollers

Wenbin LI, Hiromasa SAKAI, Shota HARADA, Yasushi TAKASE, Nao-Aki NODA

Journal Article

Fitting on the Earth: Challenges of Carbon and Nitrogen Cycle to Preserve the Habitability of the Planet

Robert Socolow

Journal Article

Investigating peak stresses in fitting and repair patches of buried polyethylene gas pipes

Reza KHADEMI ZAHEDI, Pouyan ALIMOURI, Hooman KHADEMI ZAHEDI, Mohammad SHISHESAZ

Journal Article

New nonlinear stiffness actuator with predefined torque‒deflection profile

Journal Article

Mean wind load induced incompatibility in nonlinear aeroelastic simulations of bridge spans

Zhitian ZHANG

Journal Article

General expression for linear and nonlinear time series models

Ren HUANG, Feiyun XU, Ruwen CHEN

Journal Article

Evaluation of transmissibility for a class of nonlinear passive vibration isolators

Z. K. PENG, Z. Q. LANG, G. MENG

Journal Article

Uncovering the evolution of tin use in the United States and its implications

Journal Article

Numerical analysis of nonlinear dynamic behavior of earth dams

Babak EBRAHIMIAN

Journal Article

Velocity gradient elasticity for nonlinear vibration of carbon nanotube resonators

Hamid M. SEDIGHI, Hassen M. OUAKAD

Journal Article

Combined Application of Wide-Field Electromagnetic Method and Flow Field Fitting Method for High-Resolution

Jishan He

Journal Article

Analytical approach to robust design of nonlinear mechanical systems

Jian ZHANG, Nengsheng BAO, Guojun ZHANG, Peihua GU

Journal Article

Analysis of statistical thermodynamic model for binary protein adsorption equilibria on cation exchange adsorbent

ZHOU Xiaopeng, SU Xueli, SUN Yan

Journal Article