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Data-driven approach to solve vertical drain under time-dependent loading

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 696-711 doi: 10.1007/s11709-021-0727-7

Abstract: Currently, the vertical drain consolidation problem is solved by numerous analytical solutions, such as time-dependentand DNN–GA prediction models with three different radial drainage patterns in the smear zone under time-dependentloading.

Keywords： vertical drain     artificial neural network     time-dependent loading     deep learning network     genetic algorithm    

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Chloride binding and time-dependent surface chloride content models for fly ash concrete

S. MUTHULINGAM,B. N. RAO

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 1,   Pages 112-120 doi: 10.1007/s11709-015-0322-x

Abstract: Corrosion of embedded rebars is a classical deterioration mechanism of reinforced concrete structures exposed to chloride environments. Such environments can be attributed to the presence of seawater, deicing or sea-salts, which have high concentrations of chloride ion. Chloride ingress into concrete, essential for inducing rebar corrosion, is a complex interaction between many physical and chemical processes. The current study proposes two chloride ingress parameter models for fly ash concrete, namely: 1) surface chloride content under tidal exposure condition; and 2) chloride binding. First, inconsistencies in surface chloride content and chloride binding models reported in literature, due to them not being in line with past research studies, are pointed out. Secondly, to avoid such inconsistencies, surface chloride content and chloride binding models for fly ash concrete are proposed based upon the experimental work done by other researchers. It is observed that, proposed models are simple, consistent and in line with past research studies reported in literature.

Keywords： binding isotherms     chloride ingress     concrete     fly ash     surface chloride content    

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One-dimensional consolidation of over-consolidated soil under time-dependent loading

XIE Kanghe, WANG Kun, CHEN Guohong, HU Anfeng

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 1,   Pages 67-72 doi: 10.1007/s11709-008-0009-7

Abstract: The problem of one-dimensional consolidation of over-consolidated saturated soil under time-dependentloading was studied based on semi-analytical method.The magnitude of load and that of pre-consolidation pressure as well as the loading rate has all significantWith the increasing of pre-consolidation pressure and loading rate, the rate of consolidation increases

Keywords： different     FORTRAN programming     Terzaghi ’     pre-consolidation     magnitude    

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Time-dependent deviation of bridge pile foundations caused by adjacent large-area surcharge loads in

Frontiers of Structural and Civil Engineering 2024, Volume 18, Issue 2,   Pages 184-201 doi: 10.1007/s11709-024-1047-5

Abstract: Time-dependent characteristics (TDCs) have been neglected in most previous studies investigating theIn this study, the stress-strain-time characteristics of soft soils were illustrated by consolidation-creepBased on the validated FE model, the time-dependent deformation mechanism of the pile foundation wasderived extended Koppejan model reproduced the deviation process of the bridge cap-pile foundation with timeCompared with t = 3 d (where t is surcharge time), the maximum lateral additional pressure

Keywords： bridge pile foundation     surcharge load     soft soil     time-dependent deformation     interaction mechanism    

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Minimization of total energy consumption in an m-machine flow shop with an exponential time-dependent

Lingxuan LIU, Zhongshun SHI, Leyuan SHI

Frontiers of Engineering Management 2018, Volume 5, Issue 4,   Pages 487-498 doi: 10.15302/J-FEM-2018042

Abstract:

This study investigates an energy-aware flow shop scheduling problem with a time-dependent learningA worst-case analysis on shortest process time heuristic is conducted for theoretical measurement.

Keywords： flow shop     energy-aware scheduling     learning effect     nested partition     worst-case error bound    

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Operation safety risk analysis method of hydropower project considering time-dependent effect

Zhang Sherong,YanLei

Strategic Study of CAE 2011, Volume 13, Issue 12,   Pages 51-55

Abstract:

In order to consider the time-dependent characteristic of risk factorsproject is established on the comprehensive application of the improved analytic hierarchy process, the time-dependentA scheme to demonstrate the time-dependent risk rate assessment method for an example of the earth-rockrisk rate is closely related to both the service period and design standard; considering the effect of time-dependent, the risk rate increases with time and the intersection of them reflects the technical service life

Keywords： operation safety of hydropower project     risk analysis     risk rate assessment     time-dependent reliability    

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Time-dependent metabolomics uncover dynamic metabolic adaptions in MCF-7 cells exposed to bisphenol A

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 1, doi: 10.1007/s11783-023-1604-5

Abstract:

● Metabolomic temporal profiling of cells exposed to xenobiotics.

Keywords： Metabolomics     BPA     MCF-7     Temporal profiling     Metabolic adaption     Dysregulation correlation    

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Fully stochastic analysis method for structural time-independent reliability

Du Bin,Xiang Tianyu,Zhao Renda

Strategic Study of CAE 2010, Volume 12, Issue 3,   Pages 108-112

Abstract: justify;">In order to effectively evaluate existed bridges' reliability, the effect of bridge service timeeffects are independent, based on the characteristics of the resistance and action effects variation with timeAnd a fully stochastic process model was developed to analysis time-dependent reliability.

Keywords： existing structure     stochastic process     time-dependent reliability     action effects     resistance deterioration    

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Study of the Variable Load While Estimating Existing Bridge Structure

Suo Qinghui,Qian Yongjiu,Zhang Fang

Strategic Study of CAE 2004, Volume 6, Issue 5,   Pages 52-55

Abstract: The theory of time-dependent ability is adopted to evaluate the residual service life of structure and

Keywords： bridge structure     variable load     equal exceeding probability     time-dependent ability     re-service life    

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Influence of the intensity and loading time of direct current electric field on the directional migration

Xiaoyu Wang,Yuxuan Gao,Haigang Shi,Na Liu,Wei Zhang,Hongbo Li

Frontiers of Medicine 2016, Volume 10, Issue 3,   Pages 286-296 doi: 10.1007/s11684-016-0456-9

Abstract:

Exogenic electric fields can effectively accelerate bone healing and remodeling through the enhanced migration of bone marrow mesenchymal stem cells (BMSCs) toward the injured area. This study aimed to determine the following: (1) the direction of rat BMSC (rBMSC) migration upon exposure to a direct current electric field (DCEF), (2) the optimal DCEF intensity and duration, and (3) the possible regulatory role of SDF-1/CXCR4 axis in rBMSC migration as induced by DCEF. Results showed that rBMSCs migrated to the positive electrode of the DCEF, and that the DCEF of 200 mV/mm for 4 h was found to be optimal in enhancing rBMSC migration. This DCEF strength and duration also upregulated the expression of osteoblastic genes, including ALP and OCN, and upregulated the expression of ALP and Runx2 proteins. Moreover, when CXCR4 was inhibited, rBMSC migration due to DCEF was partially blocked. These findings indicated that DCEF can effectively induce rBMSC migration. A DCEF of 200 mV/mm for 4 h was recommended because of its ability to promote rBMSC migration, proliferation, and osteogenic differentiation. The SDF-1/CXCR4 signaling pathway may play an important role in regulating the DCEF-induced migration of rBMSCs.

Keywords： DCEF     migration     osteogenesis differentiation     rBMSCs     SDF-1/CXCR-4    

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Stabilization of switched linear systems under asynchronous switching subject to admissible edge-dependentaverage dwell time Research Article

Linlin HOU, Xuan MA, Haibin SUN,houtingting8706@126.com,maxuan24@163.com,fengyun198212@163.com

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 5,   Pages 810-822 doi: 10.1631/FITEE.2000698

Abstract: The problem of stabilizing switched linear systems under is addressed. The method is applied to design a switching signal that comprises slow and fast . Under this switching signal, the restriction that the maximum delay of is known in advance is removed. The constructed Lyapunov function is associated with both the system mode and controller mode. The stabilization criteria and the corresponding algorithm are presented to obtain the controller gains and to design the switching signal. Finally, two examples are given to demonstrate the effectiveness of the proposed results.

Keywords： Asynchronous switching     Admissible edge-dependent average dwell time     Multi-Lyapunov function    

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Crystal facet-dependent CO cycloaddition to epoxides over ZnO catalysts

Frontiers of Chemical Science and Engineering 2024, Volume 18, Issue 5, doi: 10.1007/s11705-024-2412-6

Abstract: With regard to green chemistry and sustainable development, the fixation of CO2 into epoxides to form cyclic carbonates is an attractive and promising pathway for CO2 utilization. Metal oxides, renowned as promising eco-friendly catalysts for industrial production, are often undervalued in terms of their impact on the CO2 addition reaction. In this work, we successfully developed ZnO nanoplates with (002) surfaces and ZnO nanorods with (100) surfaces via morphology-oriented regulation to explore the effect of crystal faces on CO2 cycloaddition. The quantitative data obtained from electron paramagnetic resonance spectroscopy indicated that the concentration of oxygen vacancies on the ZnO nanoplate surfaces was more than twice that on the ZnO nanorod surfaces. Density functional theory calculations suggested that the (002) surfaces have lower adsorption energies for CO2 and epichlorohydrin than the (100) surfaces. As a result, the yield of cyclochloropropene carbonate on the ZnO nanoplates (64.7%) was much greater than that on the ZnO nanorods (42.3%). Further evaluation of the reused catalysts revealed that the decrease in the oxygen vacancy concentration was the primary factor contributing to the decrease in catalytic performance. Based on these findings, a possible catalytic mechanism for CO2 cycloaddition with epichlorohydrin was proposed. This work provides a new idea for the controllable preparation of high-performance ZnO catalysts for the synthesis of cyclic carbonates from CO2 and epoxides.

Keywords： carbon dioxide     cycloaddition     zinc oxide     crystal face     oxygen vacancy    

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enhanced damage plasticity model for predicting the cyclic behavior of plain concrete under multiaxial loading

Mohammad Reza AZADI KAKAVAND, Ertugrul TACIROGLU

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6,   Pages 1531-1544 doi: 10.1007/s11709-020-0675-7

Abstract: current models that adopt two damage variables, the independence of these damage variables during cyclic loadingThe model describes the cyclic behavior of concrete under multiaxial loading conditions and considersusing experimental data on concrete specimens at the material level obtained under cyclic multiaxial loading

Keywords： damage plasticity model     plain concrete     cyclic loading     multiaxial loading conditions    

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An isogeometric numerical study of partially and fully implicit schemes for transient adjoint shape sensitivity analysis

Zhen-Pei WANG, Zhifeng XIE, Leong Hien POH

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 2,   Pages 279-293 doi: 10.1007/s11465-019-0575-5

Abstract: In structural design optimization involving transient responses, time integration scheme plays a crucialIn this work, the influence of time integration scheme is studied numerically for the adjoint shape sensitivityunconditional stability; and (iii) Crank–Nicolson type approach ( =0.5) may induce a large error for large time-stepThe numerical results also show that the time-step size does not have to be chosen to satisfy the critical

Keywords： isogeometric shape optimization     design-dependent boundary condition     transient heat conduction     implicittime integration     adjoint method    

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Reconsideration on the effect of nitrogen on mixed culture polyhydroxyalkanoate production toward high organic loading

Zhiqiang Chen, Lizhi Zhao, Ye Ji, Qinxue Wen, Long Huang

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 4, doi: 10.1007/s11783-019-1135-2

Abstract:

Effect of nitrogen on mixed culture PHA production was reconsidered.

Enrichment history of PHA accumulating culture was discussed.

Higher PHA content and biomass growth were achieved in presence of nitrogen.

Enrichment strategy toward higher PHA accumulation was investigated.

Microbial community succession in PHA accumulation phase was investigated.

Keywords： Polyhydroxyalkanoate (PHA)     Organic loading rate     Nitrogen content     Biomass growth     Enrichment history    

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Title Author Date Type Operation

Data-driven approach to solve vertical drain under time-dependent loading

Journal Article

Chloride binding and time-dependent surface chloride content models for fly ash concrete

S. MUTHULINGAM,B. N. RAO

Journal Article

One-dimensional consolidation of over-consolidated soil under time-dependent loading

XIE Kanghe, WANG Kun, CHEN Guohong, HU Anfeng

Journal Article

Time-dependent deviation of bridge pile foundations caused by adjacent large-area surcharge loads in

Journal Article

Minimization of total energy consumption in an m-machine flow shop with an exponential time-dependent

Lingxuan LIU, Zhongshun SHI, Leyuan SHI

Journal Article

Operation safety risk analysis method of hydropower project considering time-dependent effect

Zhang Sherong,YanLei

Journal Article

Time-dependent metabolomics uncover dynamic metabolic adaptions in MCF-7 cells exposed to bisphenol A

Journal Article

Fully stochastic analysis method for structural time-independent reliability

Du Bin,Xiang Tianyu,Zhao Renda

Journal Article

Study of the Variable Load While Estimating Existing Bridge Structure

Suo Qinghui,Qian Yongjiu,Zhang Fang

Journal Article

Influence of the intensity and loading time of direct current electric field on the directional migration

Xiaoyu Wang,Yuxuan Gao,Haigang Shi,Na Liu,Wei Zhang,Hongbo Li

Journal Article

Stabilization of switched linear systems under asynchronous switching subject to admissible edge-dependentaverage dwell time

Linlin HOU, Xuan MA, Haibin SUN,houtingting8706@126.com,maxuan24@163.com,fengyun198212@163.com

Journal Article

Crystal facet-dependent CO cycloaddition to epoxides over ZnO catalysts

Journal Article

enhanced damage plasticity model for predicting the cyclic behavior of plain concrete under multiaxial loading

Mohammad Reza AZADI KAKAVAND, Ertugrul TACIROGLU

Journal Article

An isogeometric numerical study of partially and fully implicit schemes for transient adjoint shape sensitivity analysis

Zhen-Pei WANG, Zhifeng XIE, Leong Hien POH

Journal Article

Reconsideration on the effect of nitrogen on mixed culture polyhydroxyalkanoate production toward high organic loading

Zhiqiang Chen, Lizhi Zhao, Ye Ji, Qinxue Wen, Long Huang

Journal Article