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Modeling of large-deflection links for compliant mechanisms

Zhonglei FENG, Yueqing YU, Wenjing WANG,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3, Pages 294-301 doi: 10.1007/s11465-010-0019-8

Abstract: simulation to the tip locus of flexible links for compliant mechanisms on the basis of a parametric approximationIn this study, a new approach of a two-DOF PRBM is proposed to simulate both the tip locus and tip deflectionangle of large-deflection links for compliant mechanisms on the basis of the angular deflection approximation

Keywords： compliant mechanism pseudo-rigid-body model (PRBM) large-deflection link angular deflection approximation

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Improved prediction of pile bending moment and deflection due to adjacent braced excavation

Frontiers of Structural and Civil Engineering doi: 10.1007/s11709-023-0961-2

Abstract: This study develops equations to predict the existing pile bending moment and deflection produced bypractically unfeasible to obtain measurement data; hence, artificial data for the bending moment and deflectionThe estimation results of the developed equations can provide satisfactory pile bending moment and deflection

Keywords： pile responses excavation prediction deflection bending moments

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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: springs and especially designed cams, which could perform a predefined relationship between torque and deflectionAn analytical methodology that maps the predefined relationship between torque and deflection to theSimulations of different torque‒deflection profiles were carried out to verify the accuracy and applicabilityof performing predefined torque‒deflection profiles.Three kinds of prototype experiments, including verification experiment of the predefined torque‒deflection

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

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Thermal deflection analysis of the solidified shell in continuous casting of slab

LIU Hongzhao, WANG Zhongmin

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 2, Pages 175-179 doi: 10.1007/s11465-007-0029-3

Abstract: reciprocal theorem of work or Betti-Maxwell s reciprocal theorem and the superposition principle, the deflectionThe meaning of each term in the deflection expression obtained by the reciprocal theorem of work is explained

Keywords： s reciprocal loading deflection expression reciprocal opposite

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Instantaneous deflection of light-weight concrete slabs

Behnam VAKHSHOURI, Shami NEJADI

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 4, Pages 412-423 doi: 10.1007/s11709-017-0416-8

Abstract: moment together with the influences of ultimate moment capacity and service moment on the instantaneous deflectionmodels in the literature shows considerable differences between the recorded and estimated instantaneous deflectionanalysis of the effective parameters, a new equation is proposed and verified to predict the instantaneous deflection

Keywords： instantaneous deflection light-weight concrete expanded polystyrene effective moment of inertia cracking

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A case study on sample average approximation method for stochastic supply chain network design problem

Yuan WANG, Ruyan SHOU, Loo Hay LEE, Ek Peng CHEW

Frontiers of Engineering Management 2017, Volume 4, Issue 3, Pages 338-347 doi: 10.15302/J-FEM-2017032

Abstract: Deterministic equivalent model with nonanticipativity constraints, branch-and-fix coordination, sample average approximation

Keywords： supply chain network stochastic demand sampling average approximation Bayesian bootstrap Latin hypercube

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The Finite Element Analysis for Supporting Wheel Deflection’s Contact of Large-scale Rotary Kiln With

Li Xuejun,Zhang Meiyang,Chu Fulei

Strategic Study of CAE 2007, Volume 9, Issue 12, Pages 16-20

Abstract:

Because of the influence of rotary kiln supporting wheel's deflectioncontact area's contact stress, according to Hertz contact theory, the relative among deflectionelement method, the contact problems when supporting wheel is under parallel and the maximum deflection

Keywords： large-scale with multi-supporting supporting wheel deflection contact stress finite element analysis

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analysis of thin-walled box continuous girder with variable cross-sections in considering effect of large deflection

Yuji CHEN, Qizhi LUO,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 4, Pages 352-356 doi: 10.1007/s11709-009-0057-7

Abstract: vertical displacement, and evolving five generalized displacements with the spline function, the large deflectionThe effect of large deflection on the stress and displacement of the thin-walled box continuous girder

Keywords： thin-walled box girder with variable cross-sections potential variational theory shear lag large deflection

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On the location of the secondary instantaneous poles in two-degree-of-freedom spherical mechanisms

Soheil ZARKANDI

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 1, Pages 34-40 doi: 10.1007/s11465-014-0290-1

Abstract:

As the instant centers in planar mechanisms, the instantaneous poles (or instant poles, in brief) can be used for kinematic analysis in spherical mechanisms. One of the mandatory steps in this analysis is the determination of the location of these poles. This paper presents a theorem showing analytically that the locus of an unknown secondary instant pole in two-degree-of-freedom (2-DOF) spherical mechanisms is a great circle (GC). The exact location of the pole on its GC is obtained based on the configuration of the mechanism and velocity ratio of the two inputs. Moreover, using the results of the theorem, a geometrical technique is presented to determine the GC of the pole.

Keywords： spherical mechanisms instantaneous poles great circle angular velocity

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Shape reconstruction of parallelogram flaw

ZHENG Gangfeng, WU Bin, HE Cunfu

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 1, Pages 17-22 doi: 10.1007/s11465-008-0015-4

Abstract: To reconstruct the shape of the scatterer in elastic media, the authors deduce the Born approximationidentification of the geometrical character of a flaw is then given by the two dimensional inverse Born approximation

Keywords： approximation scatterer scattering problem information inverse

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Approximation Space of Generalization and Rough Classification Algebra

Liu Yonghong

Strategic Study of CAE 2006, Volume 8, Issue 3, Pages 39-48

Abstract:

Some new basic concepts are proposed in this paper, including the approximation space of generalization, rough approximation axiom, disturbance set axiom, classification principle of rough set, principle

Keywords： approximation space of generalization rough set rough classification algebra protocol relation rough

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Galerkin approximationwith Legendre polynomials for a continuous-time nonlinear optimal control problem Article

Xue-song CHEN

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 10, Pages 1479-1487 doi: 10.1631/FITEE.1601101

Abstract: We investigate the use of an approximation method for obtaining near-optimal solutions to a kind of nonlinearThe approach derived from the Galerkin approximation is used to solve the generalized Hamilton-Jacobi-BellmanThe Galerkin approximation with Legendre polynomials (GALP) for GHJB equations has not been applied to

Keywords： Generalized Hamilton-Jacobi-Bellman equation Nonlinear optimal control Galerkin approximation Legendre

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Deflection Analysis of RC Beam Strengthened by Epoxy-bonded Glass Fiber Reinforced Plastic Plate

Duan Jingmin,Qian Yongjiu,Zeng Xiantao

Strategic Study of CAE 2004, Volume 6, Issue 10, Pages 79-82

Abstract: In this paper, the pulling force of GFRP plate and the deflection of the plated beam have been analyzed

Keywords： strengthening GFRP RC beam deflection

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Meeting deadlines for approximation processing in MapReduce environments Article

Ming-hao HU, Chang-jian WANG, Yu-xing PENG

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 11, Pages 1754-1772 doi: 10.1631/FITEE.1601056

Abstract: To provide timely results for big data analytics, it is crucial to satisfy deadline requirements for MapReduce jobs in today’s production environments. Much effort has been devoted to the problem of meeting deadlines, and typically there exist two kinds of solutions. The first is to allocate appropriate resources to complete the entire job before the specified time limit, where missed deadlines result because of tight deadline constraints or lack of resources; the second is to run a pre-constructed sample based on deadline constraints, which can satisfy the time requirement but fail to maximize the volumes of processed data. In this paper, we propose a deadline-oriented task scheduling approach, named ‘Dart’, to address the above problem. Given a specified deadline and restricted resources, Dart uses an iterative estimation method, which is based on both historical data and job running status to precisely estimate the real-time job completion time. Based on the estimated time, Dart uses an approach–revise algorithm to make dynamic scheduling decisions for meeting deadlines while maximizing the amount of processed data and mitigating stragglers. Dart also efficiently handles task failures and data skew, protecting its performance from being harmed. We have validated our approach using workloads from OpenCloud and Facebook on a cluster of 64 virtual machines. The results show that Dart can not only effectively meet the deadline but also process near-maximum volumes of data even with tight deadlines and limited resources.

Keywords： MapReduce Approximation jobs Deadline Task scheduling Straggler mitigation

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Modulational Instability of Optical Vortices in Engineered Saturable Media Review

D.G. Pires, N.M. Litchinitser

Engineering 2022, Volume 17, Issue 10, Pages 31-43 doi: 10.1016/j.eng.2022.04.022

Abstract: Gaussian beams, light possesses many degrees of freedom that are still largely unexplored, such as spin angularmomentum (SAM) and orbital angular momentum (OAM).

Keywords： Optical vortex Orbital angular momentum Modulation instability Turbid media