The Experts below are selected from a list of 140073 Experts worldwide ranked by ideXlab platform

Hanyu Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Galerkin Least Square Method for Time-Harmonic Acoustics in Royaumont Abbey
    2017
    Co-Authors: Frédéric Magoulès, Hanyu Zhang
    Abstract:

    This paper investigates numerically the Galerkin Least Square method for time-harmonic acoustic simulation within the virtual church of Royaumont abbey. The church's history is here reviewed. Since this church was destroyed after the french revolution, the methodology to build an accurate computer aided Design Model of the church of Royaumont abbey is clearly detailed. The Helmholtz equation is considered and the finite element analysis is carried out for solving this time-harmonic acoustic problem. Numerical experiments on the computer aided Design Model demonstrate the efficiency of the stabilized finite element method compared to the classical finite element method. © 2016 IEEE.

  • Galerkin Gradient Least Square Method for Sound Holography in Royaumont Abbey
    2016
    Co-Authors: Hanyu Zhang, Peter Ivanyi, Frédéric Magoulès
    Abstract:

    The Galerkin Gradient Least Square method is here proposed to simulate the sound holography inside the church of the Royaumont abbey, which has been destroyed in 1792. The church is restored with a computer aided Design Model, which is then meshed by a voxelization algorithm for a finite element analysis. Helmholtz equation is used for Modeling the acoustics phenomena. To increase the accuracy of the finite element analysis, a stabilization parameter for the Galerkin Gradient Least Square method is first reviewed in 1D and then devised for 2D and 3D Helmholtz equation. Numerical experiments are carried out to investigate the efficiency of this new stabilization parameter and demonstrate that the Galerkin Gradient Least Square method performs superior to the Galerkin method. © 2016 IEEE.

  • CSE/EUC/DCABES - Galerkin Least Square Method for Time-Harmonic Acoustics in Royaumont Abbey
    2016 IEEE Intl Conference on Computational Science and Engineering (CSE) and IEEE Intl Conference on Embedded and Ubiquitous Computing (EUC) and 15th , 2016
    Co-Authors: Frédéric Magoulès, Hanyu Zhang
    Abstract:

    This paper investigates numerically the Galerkin Least Square method for time-harmonic acoustic simulation within the virtual church of Royaumont abbey. The church's history is here reviewed. Since this church was destroyed after the french revolution, the methodology to build an accurate computer aided Design Model of the church of Royaumont abbey is clearly detailed. The Helmholtz equation is considered and the finite element analysis is carried out for solving this time-harmonic acoustic problem. Numerical experiments on the computer aided Design Model demonstrate the efficiency of the stabilized finite element method compared to the classical finite element method.

Kyoko Ohkuni - One of the best experts on this subject based on the ideXlab platform.

  • analysis of optimal range of socket orientations in total hip arthroplasty with use of computer aided Design simulation
    Journal of Orthopaedic Research, 1998
    Co-Authors: Makoto Seki, Nobuhiro Yuasa, Kyoko Ohkuni
    Abstract:

    A three-dimensional Computer-Aided Design Model of a total hip replacement was used to study the effects of anteversion and abduction of the acetabular component and anteversion and varus-valgus an-gulation of the femoral component on the range of hip flexion and extension that could be obtained without component impingement. Impingement of the component was defined as impingement between the neck of the femoral component and the edge of the acetabular component. To achieve an angle of hip flexion greater than 90° and an extension angle greater than 30° without component impingement, the optimal angulations were found to be between 1 and 30° of anteversion and 30 and 50° of abduction of the acetabular component, as well as 10° of anteversion of the femoral component. When the valgus angulation of the femoral component was reduced from 7 to 0°, the allowable range of flexion without impingement increased under the. same conditions of acetabular-component orientation and femoral-component anteversion. Significant inverse correlations were found between the anteversion angle of the acetabular component and both the lumbar lordosis angle and the sacrohorizontal angle.

Frédéric Magoulès - One of the best experts on this subject based on the ideXlab platform.

  • Galerkin Least Square Method for Time-Harmonic Acoustics in Royaumont Abbey
    2017
    Co-Authors: Frédéric Magoulès, Hanyu Zhang
    Abstract:

    This paper investigates numerically the Galerkin Least Square method for time-harmonic acoustic simulation within the virtual church of Royaumont abbey. The church's history is here reviewed. Since this church was destroyed after the french revolution, the methodology to build an accurate computer aided Design Model of the church of Royaumont abbey is clearly detailed. The Helmholtz equation is considered and the finite element analysis is carried out for solving this time-harmonic acoustic problem. Numerical experiments on the computer aided Design Model demonstrate the efficiency of the stabilized finite element method compared to the classical finite element method. © 2016 IEEE.

  • Galerkin Gradient Least Square Method for Sound Holography in Royaumont Abbey
    2016
    Co-Authors: Hanyu Zhang, Peter Ivanyi, Frédéric Magoulès
    Abstract:

    The Galerkin Gradient Least Square method is here proposed to simulate the sound holography inside the church of the Royaumont abbey, which has been destroyed in 1792. The church is restored with a computer aided Design Model, which is then meshed by a voxelization algorithm for a finite element analysis. Helmholtz equation is used for Modeling the acoustics phenomena. To increase the accuracy of the finite element analysis, a stabilization parameter for the Galerkin Gradient Least Square method is first reviewed in 1D and then devised for 2D and 3D Helmholtz equation. Numerical experiments are carried out to investigate the efficiency of this new stabilization parameter and demonstrate that the Galerkin Gradient Least Square method performs superior to the Galerkin method. © 2016 IEEE.

  • CSE/EUC/DCABES - Galerkin Least Square Method for Time-Harmonic Acoustics in Royaumont Abbey
    2016 IEEE Intl Conference on Computational Science and Engineering (CSE) and IEEE Intl Conference on Embedded and Ubiquitous Computing (EUC) and 15th , 2016
    Co-Authors: Frédéric Magoulès, Hanyu Zhang
    Abstract:

    This paper investigates numerically the Galerkin Least Square method for time-harmonic acoustic simulation within the virtual church of Royaumont abbey. The church's history is here reviewed. Since this church was destroyed after the french revolution, the methodology to build an accurate computer aided Design Model of the church of Royaumont abbey is clearly detailed. The Helmholtz equation is considered and the finite element analysis is carried out for solving this time-harmonic acoustic problem. Numerical experiments on the computer aided Design Model demonstrate the efficiency of the stabilized finite element method compared to the classical finite element method.

Makoto Seki - One of the best experts on this subject based on the ideXlab platform.

  • analysis of optimal range of socket orientations in total hip arthroplasty with use of computer aided Design simulation
    Journal of Orthopaedic Research, 1998
    Co-Authors: Makoto Seki, Nobuhiro Yuasa, Kyoko Ohkuni
    Abstract:

    A three-dimensional Computer-Aided Design Model of a total hip replacement was used to study the effects of anteversion and abduction of the acetabular component and anteversion and varus-valgus an-gulation of the femoral component on the range of hip flexion and extension that could be obtained without component impingement. Impingement of the component was defined as impingement between the neck of the femoral component and the edge of the acetabular component. To achieve an angle of hip flexion greater than 90° and an extension angle greater than 30° without component impingement, the optimal angulations were found to be between 1 and 30° of anteversion and 30 and 50° of abduction of the acetabular component, as well as 10° of anteversion of the femoral component. When the valgus angulation of the femoral component was reduced from 7 to 0°, the allowable range of flexion without impingement increased under the. same conditions of acetabular-component orientation and femoral-component anteversion. Significant inverse correlations were found between the anteversion angle of the acetabular component and both the lumbar lordosis angle and the sacrohorizontal angle.

Biranchi Panda - One of the best experts on this subject based on the ideXlab platform.

  • 3d printing trends in building and construction industry a review
    Virtual and Physical Prototyping, 2017
    Co-Authors: Biranchi Panda, Suvash Chandra Paul, Nisar Ahamed Noor Mohamed, Kah Fai Leong
    Abstract:

    ABSTRACTThree-dimensional (3D) printing (also known as additive manufacturing) is an advanced manufacturing process that can produce complex shape geometries automatically from a 3D Computer-Aided Design Model without any tooling, dies and fixtures. This automated manufacturing process has been applied to many diverse fields of industries today due to significant advantages of creating functional prototypes in reasonable build time with less human intervention and minimum material wastage. However, a more recent application of this technology towards the built environment seems to improve our traditional building strategies while reducing the need for human resources, high capital investments and additional formworks. Research interest in employing 3D printing for building and construction has increased exponentially in the past few years. This paper reviews the latest research trends in the discipline by analysing publications from 1997 to 2016. Some recent developments for 3D concrete printing at the Si...

  • A CAD-based approach for measuring volumetric error in layered manufacturing
    Proceedings of the Institution of Mechanical Engineers Part C: Journal of Mechanical Engineering Science, 2016
    Co-Authors: Biranchi Panda, Raju Mva Bahubalendruni, Bibhuti Bhusan Biswal, Marco Leite
    Abstract:

    Rapid prototyping uses layered manufacturing technology to produce functional parts directly from 3D Computer-Aided Design Model without involving any tools and human intervention. Due to layer by layer deposition, volumetric error remains in the part which is basically the volumetric difference between Computer-Aided Design Model and the fabricated part. This volumetric error causes poor dimensional accuracy and surface finish, which has limited the widespread applications of rapid prototyping. Although rapid prototyping is able to produce functional parts in less build time with less material wastage, today many industries are looking for better surface quality associated with these parts. Literature discloses that the part quality can be improved by selecting proper build orientation that corresponds to minimum volumetric error. In support of this, current study presents a Computer-Aided Design-based novel methodology to precisely measure the volumetric error in layered manufacturing process, in partic...