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

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: study the mechanics behavior of a thin-walled box continuous girder with variable cross-sections, using potential

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

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Interfacial potential barrier theory of friction and wear

XU Zhongming, DING Lingyun, HUANG Ping, XU Zhongming

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 3,   Pages 276-282 doi: 10.1007/s11465-008-0043-0

Abstract: An interfacial potential barrier theory to calculate friction and wear is proposed by considering theThe theory suggests that the performance of friction and wear depends on the magnitude and distributionof the interfacial potential barrier on contact surfaces.The calculation methods of the interfacial potential barrier and standard interfacial potential barrierexperimental results performed with an ultra high vacuum atomic-force microscope, which proves that the theory

Keywords： coefficient     standard interfacial     interaction     formulas     calculation    

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A FEniCS implementation of the phase field method for quasi-static brittle fracture

HIRSHIKESH, Sundararajan NATARAJAN, Ratna Kumar ANNABATTULA

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 380-396 doi: 10.1007/s11709-018-0471-9

Abstract: In the recent years, the phase field method for simulating fracture problems has received considerable attention. This is due to the salient features of the method: 1) it can be incorporated into any conventional finite element software; 2) has a scalar damage variable is used to represent the discontinuous surface implicitly and 3) the crack initiation and subsequent propagation and branching are treated with less complexity. Within this framework, the linear momentum equations are coupled with the diffusion type equation, which describes the evolution of the damage variable. The coupled nonlinear system of partial differential equations are solved in a ‘staggered’ approach. The present work discusses the implementation of the phase field method for brittle fracture within the open-source finite element software, FEniCS. The FEniCS provides a framework for the automated solutions of the partial differential equations. The details of the implementation which forms the core of the analysis are presented. The implementation is validated by solving a few benchmark problems and comparing the results with the open literature.

Keywords： phase field method     FEniCS     brittle fracture     crack propagation     variational theory of fracture    

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Variational mode decomposition based modal parameter identification in civil engineering

Mingjie ZHANG, Fuyou XU

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 5,   Pages 1082-1094 doi: 10.1007/s11709-019-0537-3

Abstract: An out-put only modal parameter identification method based on variational mode decomposition (VMD) is

Keywords： modal parameter identification     variational mode decomposition     civil structure     nonlinear system     closely    

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Stability analysis of slopes with planar failure using variational calculus and numerical methods

Norly BELANDRIA, Roberto ÚCAR, Francisco M. LEÓN, Ferri HASSANI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 5,   Pages 1262-1273 doi: 10.1007/s11709-020-0657-9

Abstract: This study investigates the technique of variational calculus applied to estimate the slope stability

Keywords： slopes stability     planar failure     variational calculus     numerical methods    

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Research on theory and potential of basin cleaner production

Xie Minghui,Qiao Qi,Sun Qihong

Strategic Study of CAE 2013, Volume 15, Issue 3,   Pages 70-79

Abstract:

The basin cleaner production was discussed based on the theory and methodologyof industrial ecology, circular economy, sustainable development and systemic theory.Using the basic theory of cleaner production, combining the requisition of cleaner production from practiceAnd the system dynamics model of basin cleaner production potential (SDM-BCPP) was established.

Keywords： basin cleaner production     potential     system dynamics    

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Variational Bayesian multi-sparse component extraction for damage reconstruction of space debris hypervelocity Research Article

Xuegang HUANG, Anhua SHI, Qing LUO, Jinyang LUO,emei-126@126.com

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 4,   Pages 530-541 doi: 10.1631/FITEE.2000575

Abstract: To improve the survivability of orbiting spacecraft against space debris impacts, we propose an impact method. First, a multi-area damage mining model, which can describe damages in different spatial layers, is built based on an infrared thermal image sequence. Subsequently, to identify different impact damage types from infrared image data effectively, the inference is used to solve for the parameters in the model. Then, an image-processing framework is proposed to eliminate errors and compare locations of different damage types. It includes an image segmentation algorithm with an energy function and an image fusion method with . In the experiment, the proposed method is used to evaluate the complex damages caused by the impact of the secondary debris cloud on the rear wall of the typical Whipple shield configuration. Experimental results show that it can effectively identify and evaluate the complex damage caused by , including surface and internal defects.

Keywords： Hypervelocity impact     Variational Bayesian     Sparse representation     Damage assessment    

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New Scientific Problems of electronics in the 21st Century

Huang Zhixun

Strategic Study of CAE 2000, Volume 2, Issue 5,   Pages 21-27

Abstract: physics and electronics in the 21st century, involving vacuum energy, negative mass of electron, quantum potential, virtual particles, superstring theory and tachyons; as well as the EPR thinking experiment, quantumentanglement , quantum teleportation, quantum information theory and quantum computers.

Keywords： vacuum energy     negative mass     quantum potential     virtual particles     tachyons     quantum entanglement     quantuminformation theory     quantum computer    

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Study on variational principles of smoke particle shape and dimension with water mist appling

Fang Yudong

Strategic Study of CAE 2014, Volume 16, Issue 2,   Pages 93-100

Abstract:

The micrographs of diesel oil soot particles were achieved by transmission scanning electron microscope with and without water mist applied. It was seen by statistical analysis that the average diameter of soot particle increased and the surface density of soot particle decreased with water mist applied. The experimental results show that water mist washes out smoke mainly by dynamics effect，cloud physics effect and transportation mechanism of Steffen flow. This paper provides scientific references for water mist technology using in smoke scrubbing of computer room fires.

Keywords： water mist     smoke particle     surface density     average diameter    

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A novel hybrid model for water quality prediction based on VMD and IGOA optimized for LSTM

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 7, doi: 10.1007/s11783-023-1688-y

Abstract:

● A novel VMD-IGOA-LSTM model has proposed for the prediction of water quality.

Keywords： Water quality prediction     Grasshopper optimization algorithm     Variational mode decomposition     Long short-term    

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Analysis of Theory of Architecture

Gu Mengchao

Strategic Study of CAE 2007, Volume 9, Issue 11,   Pages 100-102

Abstract:

Starting with the analysis of the definition and concept of the theoryof architecture, the framework of architectural theory and the filling theory innovation, the authorgives his understanding on the framework of architectural theory with Chinese characteristics.

Keywords： theory of architecture     framework of architectural theory     starting point and finishing point ofarchitecturaltheory     innovation in architectural theory    

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Usability perceptions and beliefs about smart thermostats by chi-square test, signal detection theory, and fuzzy detection theory in regions of Mexico

Pedro PONCE, Therese PEFFER, Arturo MOLINA

Frontiers in Energy 2019, Volume 13, Issue 3,   Pages 522-538 doi: 10.1007/s11708-018-0562-2

Abstract: This paper proposes the use of a signal detection theory (SDT), fuzzy detection theory (FDT), and chi-square

Keywords： thermostats     perceptions     beliefs     signal detection theory (SDT)     fuzzy signal detection theory (FSDT)     chi-square    

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Energy neutrality potential of wastewater treatment plants: A novel evaluation framework integrating

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 9, doi: 10.1007/s11783-022-1549-0

Abstract:

• Framework of indicators was established based on energy efficiency and recovery.

Keywords： Wastewater treatment plants     Energy neutrality potential     Energy efficiency     Energy recovery     Evaluation    

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An Introduction to Cognetics—Unified Theory of Information, Knowledge and Intelligence

Zhong Yixin

Strategic Study of CAE 2004, Volume 6, Issue 6,   Pages 1-8

Abstract: study the properties and the refining laws of the information resources and to establish a unified theory

Keywords： information theory     knowledge theory     intelligence theory     cogmatics    

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Global warming potential associated with Irish milk powder production

William Finnegan, Jamie Goggins, Aksana Chyzheuskaya, Xinmin Zhan

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 3, doi: 10.1007/s11783-017-0949-z

Abstract: paper, a single agri-food product, milk powder, is examined in order to estimate the global warming potential

Keywords： Dairy     Global warming potential     Ireland     Life cycle assessment     Milk powder     Milk production    

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Title Author Date Type Operation

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

Yuji CHEN, Qizhi LUO,

Journal Article

Interfacial potential barrier theory of friction and wear

XU Zhongming, DING Lingyun, HUANG Ping, XU Zhongming

Journal Article

A FEniCS implementation of the phase field method for quasi-static brittle fracture

HIRSHIKESH, Sundararajan NATARAJAN, Ratna Kumar ANNABATTULA

Journal Article

Variational mode decomposition based modal parameter identification in civil engineering

Mingjie ZHANG, Fuyou XU

Journal Article

Stability analysis of slopes with planar failure using variational calculus and numerical methods

Norly BELANDRIA, Roberto ÚCAR, Francisco M. LEÓN, Ferri HASSANI

Journal Article

Research on theory and potential of basin cleaner production

Xie Minghui,Qiao Qi,Sun Qihong

Journal Article

Variational Bayesian multi-sparse component extraction for damage reconstruction of space debris hypervelocity

Xuegang HUANG, Anhua SHI, Qing LUO, Jinyang LUO,emei-126@126.com

Journal Article

New Scientific Problems of electronics in the 21st Century

Huang Zhixun

Journal Article

Study on variational principles of smoke particle shape and dimension with water mist appling

Fang Yudong

Journal Article

A novel hybrid model for water quality prediction based on VMD and IGOA optimized for LSTM

Journal Article

Analysis of Theory of Architecture

Gu Mengchao

Journal Article

Usability perceptions and beliefs about smart thermostats by chi-square test, signal detection theory, and fuzzy detection theory in regions of Mexico

Pedro PONCE, Therese PEFFER, Arturo MOLINA

Journal Article

Energy neutrality potential of wastewater treatment plants: A novel evaluation framework integrating

Journal Article

An Introduction to Cognetics—Unified Theory of Information, Knowledge and Intelligence

Zhong Yixin

Journal Article

Global warming potential associated with Irish milk powder production

William Finnegan, Jamie Goggins, Aksana Chyzheuskaya, Xinmin Zhan

Journal Article