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An analytical method for calculating torsional constants for arbitrary complicated thin-walled cross-sections

DU Baisong, GE Yaojun, ZHOU Zheng

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 3,   Pages 293-297 doi: 10.1007/s11709-007-0038-7

Abstract: Finally, a complicated thin-walled cross-section is given as a valid numerical example to verify the

Keywords： homogeneous     complicated thin-walled     numerical example     advantage     torsional function    

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Application Example of Creativity Thinking and Its Revelation Effect

Li Qiang

Strategic Study of CAE 2003, Volume 5, Issue 6,   Pages 59-62

Abstract:

The yield mechanism of creativity achievement of gravity separation for solving engineering problem has been analyzed in this paper according to the divergence - convergence model, after the background and realizing track of the advanced dry coal separation with air-dense medium in fluidization bed be put forward in the field of mineral processing. And the application process of creativity thinking and its revelation effect have been discussed, too.

Keywords： gravity separation     creativity thinking     divergence-convergence model     application example    

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Simulation of long-term nutrient removal in a full-scale closed-loop bioreactor for sewage treatment: an example

Zheng LI,Rong QI,Wei AN,Takashi MINO,Tadashi SHOJI,Willy VERSTRAETE,Jian GU,Shengtao LI,Shiwei XU,Min YANG

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 3,   Pages 534-544 doi: 10.1007/s11783-014-0660-2

Abstract: In this study, the performance of nitrogen and phosphorus removal in a full-scale closed-loop bioreactor (oxidation ditch) system was simulated using the ASM2d model. Routine data describing the process for two years were compiled for calibration and validation. To overcome the identifiability problem, the classic Bayesian inference approach was utilized for parameter estimation. The calibrated model could describe the long-term trend of nutrient removal and short-term variations of the process performance, showing that the Bayesian method was a reliable and useful tool for the parameter estimation of the activated sludge models. The anoxic phosphate uptake by polyphosphate accumulating organisms (PAO) contributed 71.2% of the total Poly-P storage, which reveals the dominance of denitrifying phosphorus removal process under the oxygen limiting conditions. It was found that 58.7% of the anoxic Poly-P storage and denitrification by PAO in the reactor was achieved in the aerated compartment, implying that the PAO’s anoxic activity was significantly stimulated by the low dissolved oxygen (DO) level in this compartment due to the oxygen gradient caused by brush aerator.

Keywords： activated sludge model     Bayesian inference     biological nutrient removal     closed-loop bioreactor     oxidation ditch     denitrifying polyphosphate accumulating organisms    

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Research on brackish water desalination by new energy—Take Gansu Province for example

Wang Gang

Strategic Study of CAE 2015, Volume 17, Issue 3,   Pages 45-49

Abstract:

The paper proposes to apply one new technology base on the research results of “973” project of non-grid-connected wind power to gain freshwater in some areas （such as Gansu Province） which is shortage of freshwater resources，but rich in Brackish water. Then，efficiency advantages of the new technology are analyzed from the perspective of energy consumption and energy conservation. Some suggestions about this application of large-scale technology were put forward.

Keywords： non-grid-connected； new energy； brackish water； desalination    

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GIS-based numerical simulation of Amamioshima debris flow in Japan

Jian WU, Guangqi CHEN, Lu ZHENG, Yingbin ZHANG

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 2,   Pages 206-214 doi: 10.1007/s11709-013-0198-6

Abstract: Finally, the numerical model coupled with GIS is applied to simulate the debris flow occurred on Oct.

Keywords： debris flow     numerical simulation     GIS     movement     erosion     deposition    

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mode for the large railway construction enterprise — taking China Tiesiju Civil Engineering Group for example

Xu Baocheng

Strategic Study of CAE 2012, Volume 14, Issue 12,   Pages 58-61

Abstract: Furthermore, the paper discusses about the changing operation mode of railway construction enterprise by the example

Keywords： construction enterprise     railway     changing mode     operation mode    

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Experimental and numerical study on microcrack detection using contact nonlinear acoustics

Xiaojia CHEN, Yuanlin WANG

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2,   Pages 137-141 doi: 10.1007/s11709-009-0028-z

Abstract: The paper’s main work concentrates on the experimental and numerical verification of the effectivityBoth experiments and numerical tests are performed.The numerical test illustrates the decline of when microcracks penetrate each other.

Keywords： microcrack detection     contact nonlinearity     numerical analysis    

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An investigation on prevalent strategies for XFEM-based numerical modeling of crack growth in porous

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 914-936 doi: 10.1007/s11709-021-0750-8

Abstract: Among all numerical methods, the extended finite element method (XFEM) has recently attracted much attention

Keywords： numerical modeling     extended finite element method     porous media     crack growth     stress intensity factor    

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Study on the Mechanism and Cause Mode of the Karst Collapse——Taking Tai’an-Laiwu for Example

Gao Zongjun

Strategic Study of CAE 2008, Volume 10, Issue 4,   Pages 38-43

Abstract:

The fearful karst collapses have been produced in succession since 1970s by the exploitation of karst water in the area of Tai'an-Laiwu, Shandong province. The limestone buried by Quaternary System grows into karst caves, and karst collapse brings enormous harm to the local society and economy development. The spatio-temporal distributing characteristics of karst collapse are summed up in detail. The geological condition, artificial function and forming mechanism of karst collapse are discussed. The cause mode of the karst collapse aiming at the existing questions is discussed and the idea for karst collapse studying in the future is given at last.

Keywords： Tai’an-Laiwu     karst collaps     spatio-temporal distributing characteristics     forming mechanism     cause mode    

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Simulation of viscoelastic behavior of defected rock by using numerical manifold method

Feng REN, Lifeng FAN, Guowei MA

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 2,   Pages 199-207 doi: 10.1007/s11709-011-0102-1

Abstract: Numerical simulations of longitudinal wave propagation in a rock bar with microcracks are conducted byusing the numerical manifold method which has great advantages in the simulation of discontinuities.Firstly, validation of the numerical manifold method is carried out by simulations of a longitudinal

Keywords： stress wave propagation     defected rock     numerical manifold method     viscoelastic behavior     storage modulus    

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Numerical modeling and performance evaluation of passive convergence-permeable reactive barrier (PC-PRB

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 11, doi: 10.1007/s11783-023-1731-z

Abstract:

● A 2D finite-element solute transport model, PRB-Trans, is developed.

Keywords： Passive convergence-permeable reactive barrier     Numerical modeling     Hydraulic behavior assessment     Pollutant    

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Numerical analysis of hydrodynamic process of circular-translational-moving polishing (CTMP)

ZHAI Wenjie, LIU Changxiong, LIANG Yingchun

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 4,   Pages 441-448 doi: 10.1007/s11465-008-0074-6

Abstract: The obtained numerical analysis can be used as guidance for choosing operation parameters in a practical

Keywords： numerical analysis     practical CTMP     circular-translational-moving polishing     CTMP     different    

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Adversarial Attacks and Defenses in Deep Learning Feature Article

Kui Ren, Tianhang Zheng, Zhan Qin, Xue Liu

Engineering 2020, Volume 6, Issue 3,   Pages 346-360 doi: 10.1016/j.eng.2019.12.012

Abstract:

With the rapid developments of artificial intelligence (AI) and deep learning (DL) techniques, it is critical
to ensure the security and robustness of the deployed algorithms. Recently, the security vulnerability of
DL algorithms to adversarial samples has been widely recognized. The fabricated samples can lead to various
misbehaviors of the DL models while being perceived as benign by humans. Successful implementations
of adversarial attacks in real physical-world scenarios further demonstrate their practicality.
Hence, adversarial attack and defense techniques have attracted increasing attention from both machine
learning and security communities and have become a hot research topic in recent years. In this paper,
we first introduce the theoretical foundations, algorithms, and applications of adversarial attack techniques.
We then describe a few research efforts on the defense techniques, which cover the broad frontier
in the field. Several open problems and challenges are subsequently discussed, which we hope will provoke
further research efforts in this critical area.

Keywords： Machine learning     Deep neural network Adversarial example     Adversarial attack     Adversarial defense    

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Vortex-induced vibration of stay cable under profile velocity using CFD numerical simulation method

Wenli CHEN, Hui LI,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 4,   Pages 357-363 doi: 10.1007/s11709-009-0060-z

Abstract: A stay cable with the inclined angle of 30° is used as the numerical model.long cable under a uniform flow in water (i.e., without consideration of profile) obtained by direct numerical

Keywords： stay cable     fluid-structure interaction     numerical simulation     vortex-induced vibration    

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Analytical and numerical investigation into the longitudinal vibration of uniform nanotubes

Masoud MASOUMI,Mehdi MASOUMI

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 2,   Pages 142-149 doi: 10.1007/s11465-014-0292-z

Abstract: Furthermore, differential quadrature method, as a numerical solution technique, is used to study the

Keywords： continuum theory     differential quadrature method     nanorod     longitudinal vibration    

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Title Author Date Type Operation

An analytical method for calculating torsional constants for arbitrary complicated thin-walled cross-sections

DU Baisong, GE Yaojun, ZHOU Zheng

Journal Article

Application Example of Creativity Thinking and Its Revelation Effect

Li Qiang

Journal Article

Simulation of long-term nutrient removal in a full-scale closed-loop bioreactor for sewage treatment: an example

Zheng LI,Rong QI,Wei AN,Takashi MINO,Tadashi SHOJI,Willy VERSTRAETE,Jian GU,Shengtao LI,Shiwei XU,Min YANG

Journal Article

Research on brackish water desalination by new energy—Take Gansu Province for example

Wang Gang

Journal Article

GIS-based numerical simulation of Amamioshima debris flow in Japan

Jian WU, Guangqi CHEN, Lu ZHENG, Yingbin ZHANG

Journal Article

mode for the large railway construction enterprise — taking China Tiesiju Civil Engineering Group for example

Xu Baocheng

Journal Article

Experimental and numerical study on microcrack detection using contact nonlinear acoustics

Xiaojia CHEN, Yuanlin WANG

Journal Article

An investigation on prevalent strategies for XFEM-based numerical modeling of crack growth in porous

Journal Article

Study on the Mechanism and Cause Mode of the Karst Collapse——Taking Tai’an-Laiwu for Example

Gao Zongjun

Journal Article

Simulation of viscoelastic behavior of defected rock by using numerical manifold method

Feng REN, Lifeng FAN, Guowei MA

Journal Article

Numerical modeling and performance evaluation of passive convergence-permeable reactive barrier (PC-PRB

Journal Article

Numerical analysis of hydrodynamic process of circular-translational-moving polishing (CTMP)

ZHAI Wenjie, LIU Changxiong, LIANG Yingchun

Journal Article

Adversarial Attacks and Defenses in Deep Learning

Kui Ren, Tianhang Zheng, Zhan Qin, Xue Liu

Journal Article

Vortex-induced vibration of stay cable under profile velocity using CFD numerical simulation method

Wenli CHEN, Hui LI,

Journal Article

Analytical and numerical investigation into the longitudinal vibration of uniform nanotubes

Masoud MASOUMI,Mehdi MASOUMI

Journal Article