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Computational simulation methods for fiber reinforced composites

Vladimír KOMPI, Zuzana MURINKOV, Sergey RJASANOW, Richards GRZIBOVSKIS, Qinghua QIN,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 3,   Pages 396-401 doi: 10.1007/s11709-010-0079-1

Abstract: Trefftz-finite element method (Trefftz-FEM), adaptive cross approximation BEM (ACA BEM) and continuous

Keywords： Trefftz-finite element method (Trefftz-FEM)     adaptive cross approximation BEM (ACA BEM)     method of continuous    

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On subsurface box-shaped lined tunnel under incident SH-wave propagation

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 948-960 doi: 10.1007/s11709-021-0740-x

Abstract: In this paper, a half-plane time-domain boundary element method is applied to obtain the seismic ground response, including a subsurface box-shaped lined tunnel deployed in a linear homogenous elastic medium exposed to obliquely incident SH-waves. Only the boundary around the tunnel is required to be discretized. To prepare an appropriate model by quadratic elements, a double-node procedure is used to receive dual boundary fields at corners as well as change the direction of the normal vector. After encoding the method in a previously confirmed computer program, a numerical study is carried out to sensitize some effective parameters, including frequency content and incident wave angle for obtaining a surface response. The depth and impedance ratio of the lining are assumed to be unvaried. The responses are illustrated in the time and frequency domains as two/three-dimensional graphs. The results showed that subsurface openings with sharp corners distorted the propagation path of the anti-plane waves to achieve the critical states on the ground surface. The present approach can be proposed to civil engineers for preparing simple underground box-shaped models with angular boundaries.

Keywords： box-lined tunnel     half-plane BEM     surface response     SH-wave     time-domain    

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Research on acoustic-structure sensitivity using FEM and BEM

ZHANG Jun, ZHAO Wenzhong, ZHANG Weiying

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 1,   Pages 62-67 doi: 10.1007/s11465-007-0010-1

Abstract: Using FEM (finite element method) and BEM (boundary element method) acoustic-structure sensitivity wasacoustic pressure sensitivity with respect to structure velocity were carried out by using acoustic BEMacoustic-structure sensitivity was computed by linking velocity sensitivity in FEM and acoustic sensitivity in BEMResults show that acoustic-structure sensitivity method linked with FEM and BEM is effective and correct

Keywords： sensitivity method     BEM     acoustic pressure     pressure sensitivity     frequency    

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Implementation of sinh method in integration space for boundary integrals with near singularity in potential problems

Guizhong XIE,Dehai ZHANG,Jianming ZHANG,Fannian MENG,Wenliao DU,Xiaoyu WEN

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 4,   Pages 412-422 doi: 10.1007/s11465-016-0396-8

Abstract:

As a widely used numerical method, boundary element method (BEM) is efficient for computer aided engineeringboundary integrals with near singularity need to be calculated accurately and efficiently to implement BEM

Keywords： computer aided engineering (CAE)     boundary element method (BEM)     near singularity     sinh method     coordinate    

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Numerical simulation of two-dimensional spouted bed with draft plates by discrete element method

ZHAO Yongzhi, JIANG Maoqiang, CHENG Yi, JIN Yong

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 1,   Pages 5-9 doi: 10.1007/s11705-008-0009-0

Abstract: particles in the spouted bed with complex geometry was solved by combining DEM and boundary element method (BEMThe minimal spouted velocity was obtained by the BEM-DEM-CFD simulation and the variation of the flow

Keywords： annulus     BEM-DEM-CFD simulation     gas-solid     two-dimensional     relationship    

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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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Energy modeling and data structure framework for Sustainable Human-Building Ecosystems (SHBE) — a review

Suraj TALELE, Caleb TRAYLOR, Laura ARPAN, Cali CURLEY, Chien-Fei CHEN, Julia DAY, Richard FEIOCK, Mirsad HADZIKADIC, William J. TOLONE, Stan INGMAN, Dale YEATTS, Omer T. KARAGUZEL, Khee Poh LAM, Carol MENASSA, Svetlana PEVNITSKAYA, Thomas SPIEGELHALTER, Wei YAN, Yimin ZHU, Yong X. TAO

Frontiers in Energy 2018, Volume 12, Issue 2,   Pages 314-332 doi: 10.1007/s11708-017-0530-2

Abstract: This paper contributes an inclusive review of scientific studies in the field of sustainable human building ecosystems (SHBEs). Reducing energy consumption by making buildings more energy efficient has been touted as an easily attainable approach to promoting carbon-neutral energy societies. Yet, despite significant progress in research and technology development, for new buildings, as energy codes are getting more stringent, more and more technologies, e.g., LED lighting, VRF systems, smart plugs, occupancy-based controls, are used. Nevertheless, the adoption of energy efficient measures in buildings is still limited in the larger context of the developing countries and middle income/low-income population. The objective of Sustainable Human Building Ecosystem Research Coordination Network (SHBE-RCN) is to expand synergistic investigative podium in order to subdue barriers in engineering, architectural design, social and economic perspectives that hinder wider application, adoption and subsequent performance of sustainable building solutions by recognizing the essential role of human behaviors within building-scale ecosystems. Expected long-term outcomes of SHBE-RCN are collaborative ideas for transformative technologies, designs and methods of adoption for future design, construction and operation of sustainable buildings.

Keywords： sustainability     building energy modeling (BEM)     occupant behaviors (OB)     sustainable ecosystems     System for    

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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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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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Terrain classification and adaptive locomotion for a hexapod robot Qingzhui

Yue ZHAO, Feng GAO, Qiao SUN, Yunpeng YIN

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 2,   Pages 271-284 doi: 10.1007/s11465-020-0623-1

Abstract: The knowledge of various ground properties and adaptive locomotion based on different surface materialsA terrain classification and adaptive locomotion method for a hexapod robot named Qingzhui is proposedThen, an adaptive locomotion on different ground properties is proposed.

Keywords： terrain classification     hexapod robot     legged robot     adaptive locomotion     gait control    

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Conservation and adaptive-reuse of historical industrial building in China in the post-industrial era

WANG Jianguo, JIANG Nan

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 4,   Pages 474-480 doi: 10.1007/s11709-007-0064-5

Abstract: The conservation and adaptive-reuse of historical industrial building is one of the most important issuesIn this paper, the necessity and academic meaning of the conservation and adaptive-reuse of historicalrend both at home and abroad, and the basic contents of the implementation of the conservation and adaptive-reuse

Keywords： historical industrial     industrial building     implementation     adaptive-reuse     empirical    

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Methods and applications of DEA cross-efficiency: Review and future perspectives

Jie WU, Jiasen SUN, Liang LIANG

Frontiers of Engineering Management 2021, Volume 8, Issue 2,   Pages 199-211 doi: 10.1007/s42524-020-0133-1

Abstract: To address this problem, scholars have proposed the cross-efficiency evaluation (CREE) method.reviews the theory and applications of CREE, including the non-uniqueness problem, the aggregation of cross-efficiency

Keywords： cross-efficiency evaluation     efficiency     secondary goal model     aggregation     review    

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Prevalence and determinations of physical inactivity among public hospital employees in Shanghai, China: a cross-sectional

Xinjian Li,Minna Cheng,Hao Zhang,Ting Ke,Yisheng Chen

Frontiers of Medicine 2015, Volume 9, Issue 1,   Pages 100-107 doi: 10.1007/s11684-014-0372-9

Abstract: A cross-sectional study of 4612 employees aged 19 to 68 years was conducted through stratified cluster

Keywords： prevalence     determination     employee     public hospital     cross-sectional study     physical inactivity    

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Title Author Date Type Operation

Computational simulation methods for fiber reinforced composites

Vladimír KOMPI, Zuzana MURINKOV, Sergey RJASANOW, Richards GRZIBOVSKIS, Qinghua QIN,

Journal Article

On subsurface box-shaped lined tunnel under incident SH-wave propagation

Journal Article

Research on acoustic-structure sensitivity using FEM and BEM

ZHANG Jun, ZHAO Wenzhong, ZHANG Weiying

Journal Article

Implementation of sinh method in integration space for boundary integrals with near singularity in potential problems

Guizhong XIE,Dehai ZHANG,Jianming ZHANG,Fannian MENG,Wenliao DU,Xiaoyu WEN

Journal Article

Numerical simulation of two-dimensional spouted bed with draft plates by discrete element method

ZHAO Yongzhi, JIANG Maoqiang, CHENG Yi, JIN Yong

Journal Article

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

Journal Article

Energy modeling and data structure framework for Sustainable Human-Building Ecosystems (SHBE) — a review

Suraj TALELE, Caleb TRAYLOR, Laura ARPAN, Cali CURLEY, Chien-Fei CHEN, Julia DAY, Richard FEIOCK, Mirsad HADZIKADIC, William J. TOLONE, Stan INGMAN, Dale YEATTS, Omer T. KARAGUZEL, Khee Poh LAM, Carol MENASSA, Svetlana PEVNITSKAYA, Thomas SPIEGELHALTER, Wei YAN, Yimin ZHU, Yong X. TAO

Journal Article

Shape reconstruction of parallelogram flaw

ZHENG Gangfeng, WU Bin, HE Cunfu

Journal Article

Approximation Space of Generalization and Rough Classification Algebra

Liu Yonghong

Journal Article

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

Xue-song CHEN

Journal Article

Meeting deadlines for approximation processing in MapReduce environments

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

Journal Article

Terrain classification and adaptive locomotion for a hexapod robot Qingzhui

Yue ZHAO, Feng GAO, Qiao SUN, Yunpeng YIN

Journal Article

Conservation and adaptive-reuse of historical industrial building in China in the post-industrial era

WANG Jianguo, JIANG Nan

Journal Article

Methods and applications of DEA cross-efficiency: Review and future perspectives

Jie WU, Jiasen SUN, Liang LIANG

Journal Article

Prevalence and determinations of physical inactivity among public hospital employees in Shanghai, China: a cross-sectional

Xinjian Li,Minna Cheng,Hao Zhang,Ting Ke,Yisheng Chen

Journal Article