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Microdamage study of granite under thermomechanical coupling based on the particle flow code

Frontiers of Structural and Civil Engineering Pages 1413-1427 doi: 10.1007/s11709-023-0953-2

Abstract: In this study, an improved temperature-dependent linear parallel bond model is introduced under the frameworkthermomechanical coupling tests are then conducted to calibrate the micro-parameters of the proposed modelWith this improved model, the thermodynamic response and underlying cracking behavior of a deep-buried

Keywords： thermomechanical coupling effect granite improved linear parallel bond model thermal property particle

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Linear quadratic optimal controller for cable-driven parallel robots

Saeed ABDOLSHAH,Erfan SHOJAEI BARJUEI

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 4, Pages 344-351 doi: 10.1007/s11465-015-0364-8

Abstract:

In recent years, various cable-driven parallel robots have been investigated for their advantages,such as low structural weight, high acceleration, and large workspace, over serial and conventional parallelA linear quadratic (LQ) optimal controller can provide all the states of a system for the feedback, suchThus, the application of such an optimal controller in cable-driven parallel robots can result in moreThis paper presents an approach to apply the LQ optimal controller on cable-driven parallel robots.

Keywords： accuracy cable-driven parallel robot linear quadratic optimal control

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Development of a masticatory robot using a novel cable-driven linear actuator with bidirectional motion

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0687-1

Abstract: A cable-driven linear actuator (CDLA) capable of bidirectional motion is proposed in this study to design

Keywords： masticatory robot cable-driven linear actuator parallel robot stiffness analysis

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Elevated temperature creep model of parallel wire strands

Frontiers of Structural and Civil Engineering Pages 1060-1071 doi: 10.1007/s11709-023-0981-y

Abstract: Parallel wire strands (PWSs), which are widely used in prestressed steel structures, are typically inanalyze their creep behavior, this study experimentally investigated the elevated temperature creep modelThe parameters in the general empirical formula, the Bailey–Norton model, and the composite time-hardeningmodel were fitted based on the experimental results.By evaluating the accuracy and form of the models, the composite time-hardening model, which can simultaneously

Keywords： parallel wire strands experimental study elevated temperature creep model

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Effect of embedment length of untreated natural fibres on the bond behaviour in cement mortar

Gudimella RAMAKRISHNA, Sriraman PRIYADHARSHINI

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4, Pages 454-460 doi: 10.1007/s11709-017-0454-2

Abstract: effects of various matrices with 1:3, 1:4 and 1:5 mortars and fibre types of sisal and coir on the bondFrom the results, it is seen that the bond strength is improving with respect to age of curing in casesuch as mortar mixes, sand gradation, w/c ratio and embedded length also showed significant effect on bond

Keywords： bond strength cement mortar natural fibre pullout test type of failure

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Modular design of typical rigid links in parallel kinematic machines: Classification and topology optimization

Xinjun LIU, Xiang CHEN, Zhidong LI

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 2, Pages 199-209 doi: 10.1007/s11465-012-0315-6

Abstract:

Due to the demand of reconfigurable system in parallel kinematic machines (PKMs), modular design technology

Keywords： parallel kinematic machines (PKMs) modular design classification topology optimization and improved Guide-Weight

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Improved Matching Algorithms for Linear Face Class Model

Fu Yun,Zheng Nanning

Strategic Study of CAE 2005, Volume 7, Issue 2, Pages 47-56

Abstract:

An advanced matching technique for linear face class model is proposed, which can solve the problemminimization algorithm is used to compute the near global optimal solution that may fit to yield accurate modelcluster area and the resampling ratio, the detailed representations are effectively controlled, and the modelAn improved Stochastic Gradient Descent (SGD) algorithm based on the Correlative Disturbance (CD) andAdaptive Learning Rate (ALR) is exploited to accelerate iteration convergence and compute valid model

Keywords： facial modeling model matching stochastic gradient descent non-uniform sampling multiresolution analysis

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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: such as ARMA, AR, and MA are founded on the normality and stationarity of a system and expressed by a lineardifference equation; therefore, they are strictly limited to the linear system.This paper proposes a general expression for linear and nonlinear auto-regressive time series modelsThe model simulation and experiments show that the GNAR model can accurately approximate to the dynamicThe proposed GNAR model is flexible and effective.

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

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An improved algorithm for McDowell’s analytical model of residual stress

Zhaoxu QI,Bin LI,Liangshan XIONG

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 2, Pages 150-155 doi: 10.1007/s11465-014-0295-9

Abstract:

The analytical model for two-dimensional elastoplastic rolling/sliding contact proposed by McDowellIn application of the model, a problem of low predicting precision near the surface layer of the componentAccording to the volume-constancy of plastic deformation, an improved algorithm for McDowell’smodel is proposed in order to improve its predicting accuracy of the surface residual stress.by modified method is much closer to the FEM results than the results predicted by McDowell’s model

Keywords： residual stress McDowell’s model volume-constancy of plastic deformation FEM elastoplastic rolling/sliding

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Comparison between linear and non-linear forms of pseudo-first-order and pseudo-second-order adsorption

Junxiong LIN , Lan WANG ,

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 3, Pages 320-324 doi: 10.1007/s11783-009-0030-7

Abstract: The best-fit equations of linear and non-linear forms of the two widely used kinetic models, namely pseudo-first-orderThe results show that the non-linear forms of pseudo-first-order and pseudo-second-order models weremore suitable than the linear forms for fitting the experimental data.The experimental kinetics may have been distorted by linearization of the linear kinetic equations, andIn addition, the Δ(%) method for error analysis may be better to determine the best-fitting model

Keywords： adsorption pseudo-first order pseudo-second order kinetic model linear method non-linear method

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A comprehensive analysis of a 3-P (Pa) S spatial parallel manipulator

Yuzhe LIU,Liping WANG,Jun WU,Jinsong WANG

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 1, Pages 7-19 doi: 10.1007/s11465-015-0324-3

Abstract:

In this paper, a novel 3-degree of freedom (3-DOF) spatial parallel kinematic machine (PKM) is analyzedSecondly, the kinematics model of this spatial PKM is set up.Furthermore, the velocity model is put forward.Two indexes based on the velocity model are employed to investigate the performance of this spatial PKMAt last, the output error model can be obtained and simulated.

Keywords： parallel mechanism concomitant motions kinematics workspaces error model

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Identification of pollution sources in rivers using a hydrodynamic diffusion wave model and improved

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 7, doi: 10.1007/s11783-023-1685-1

Abstract:

● A hydrodynamic-Bayesian inference model was developed for water

Keywords： Identification of pollution sources Water quality restoration Bayesian inference Hydrodynamic model

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Calculation of H₂⁺ Structural Parameters based on Hydrogen Atomic Protonized Model

Chen Jing

Strategic Study of CAE 2004, Volume 6, Issue 11, Pages 29-32

Abstract:

The hydrogen atomic protonized model was introduced in present paper for calculation of H_{2model for bond-length, bond-energy and force constant of hydrogen molecule}

Keywords： hydrogen molecule ion bond-length bond-energy force constant

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Evaluation of the power consumption of a high-speed parallel robot

Gang HAN, Fugui XIE, Xin-Jun LIU

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 2, Pages 167-178 doi: 10.1007/s11465-017-0456-8

Abstract:

An inverse dynamic model of a high-speed parallel robot is established based on the virtual work principleWith this dynamic model, a new evaluation method is proposed to measure the power consumption of theThe distributions of the power input and output transmissibility of the high-speed parallel robot are

Keywords： high-speed parallel robot dynamic model power consumption evaluation method power vector

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Cutting CO emissions through demand side regulation: Implications from multi-regional input–output linearprogramming model

Frontiers of Engineering Management Pages 452-461 doi: 10.1007/s42524-022-0209-1

Abstract: This study combines multi-regional input–output (MRIO) model with linear programming (LP) model to exploreThe proposed MRIO–LP model considers the inter-relationship among various sectors and

Keywords： CO₂ emissions demand side regulation multi-regional input–output model linear programmingmodel