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Algebraic treatment of the MIC-Kepler System in Spherical Coordinates

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Chinese Physics Letters 2007年第8期24卷 2173-2176页

作者： M. t. Chefrour Departement de Physique Institut des Sciences Centre Universitaire de Souk-Ahras Souk-Ahras Algerie

the MIC-Kepler system is studied via the Milshtein Strakhovenko variant of the so（2,1） Lie algebra. Green＇s function is constructed in spherical coordinates, with the help of the Kustaanheimo Stiefel variables and the generators of the S0（2,1） group. the energy spectrum and the normalized wavefunctions of the bound states are obtained.

关键词： FIELD

Uncertainty, certainty, and relativity(Invited Paper)

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Chinese Optics Letters 2016年第1期14卷 2-6页

作者： Francis t.S.Yu Department of Electrical Engineering Penn State University

One of the most fascinating principles in quantum mechanics must be Heisenberg＇s uncertainty principle, which can be briefly stated as follows： every physicM observation cannot be precisely determined without some degree of error or uncertainty. And it is by no means can one use the principle within the limit of certainty region, as will be shown in this Letter. two of the most important pillars in modern physics must be Einstein＇s relativity theory and SchrSdinger＇s contribution to quantum mechanics. Yet, there is a profound connection between these discoveries by means of the uncertainty relationship, in which we shown that the observation of a high-speed object is conceivable if the speed of the observer keeps up with object＇s speed.

关键词： and relativity certainty Uncertainty

A deep neural network based surrogate model for damage identification in full-scale structures with incomplete noisy measurements

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Frontiers of Structural and Civil Engineering 2024年第3期18卷 393-410页

作者： tram BUI-NGOC Duy-Khuong LY tam t tRUONG Chanachai tHONGCHOM t.NGUYEN-tHOI Laboratory for Computational Mechanics Institute for Computational Science and Artificial IntelligenceVan Lang UniversityHo Chi Minh City 70000Vietnam Faculty of Mechanical-Electrical and Computer Engineering School of TechnologyVan Lang UniversityHo Chi Minh City 70000Vietnam Faculty of Civil Engineering School of TechnologyVan Lang UniversityHo Chi Minh City 70000Vietnam Department of Computer Science Aarhus UniversityAarhus 8000Denmark thammasat University research unit in structural and foundation engineering Department of Civil EngineeringThammasat UniversityPathumthani 12120Thailand Laboratory for Applied and Industrial Mathematics Institute for Computational Science and Artificial IntelligenceVan Lang UniversityHo Chi Minh City 70000Vietnam thammasat School of Engineering Thammasat UniversityPathumthani 12120Thailand

the paper introduces a novel approach for detecting structural damage in full-scale structures using surrogate models generated from incomplete modal data and deep neural networks(DNNs).A significant challenge in this field is the limited availability of measurement data for full-scale structures,which is addressed in this paper by generating data sets using a reduced finite element(FE)model constructed by SAP2000 software and the MAtLAB programming *** surrogate models are trained using response data obtained from the monitored structure through a limited number of measurement *** proposed approach involves training a single surrogate model that can quickly predict the location and severity of damage for all potential *** achieve the most generalized surrogate model,the study explores different types of layers and hyperparameters of the training algorithm and employs state-of-the-art techniques to avoid overfitting and to accelerate the training *** approach’s effectiveness,efficiency,and applicability are demonstrated by two numerical *** study also verifies the robustness of the proposed approach on data sets with sparse and noisy measured ***,the proposed approach is a promising alternative to traditional approaches that rely on FE model updating and optimization algorithms,which can be computationally *** approach also shows potential for broader applications in structural damage detection.

关键词： vibration-based damage detection deep neural network full-scale structures finite element model updating noisy incomplete modal data

the Isentropic Exponent of Single-Ionized Mono-Atomic Plasmas

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Plasma Science and technology 2012年第8期14卷 699-701页

作者： K.t.A.L.BURM PlasmAIX for Plasma Research Heimerik 472440 GeelBelgium

the isentropic exponent of single-ionized mono-atomic plasmas in thermal equilib- rium is studied. Its behavior as a function of the ionization degree and temperature is examined for argon and zinc plasmas at two pressures （1 bar and 1 mbar, 1 mPa and 1 Pa）, respectively. the results show that for the two sorts of plasma the isentropic exponent equals typically about 1.1-1.2 within a considerably wide range of the ionization degree （5%-80%）.

关键词： plasma modelling isentropic exponent

Influences of residual stress and micro-deformation on microstructures and mechanical properties for ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy produced by laser powder bed fusion

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Journal of Materials Science & technology 2021年第16期75卷 174-183页

作者： C.C.Zhang H.L.Wei t.t.Liu L.Y.Jiang t.Yang W.H.Liao National Joint Engineering Research Center of NC Forming technology and Equipment School of Mechanical EngineeringNanjing University of Science and TechnologyNanjing 210094China

Laser powder bed fusion(LPBF)yields unique advantages during the fabrication of titanium *** the present work,ti-6.5 Al-3.5 Mo-1.5 Zr-0.3 Si alloy specimens with excellent mechanical performances were fabricated by *** as-built specimens displayed relatively high strength and ductility under modest volume energy densities(VEDs),whereas they manifested high strength with low ductility under high *** investigate the key reason of this phenomenon,the specimens were designed with two VEDs ranges of 60 J/mm^(3) and 85 J/mm^(3).Special attention was paid to the influences of residual stress and micro-deformation on microstructures and mechanical properties for the first *** results indicated that the residual stresses and relative density of the 60 J/mm^(3) range specimens were higher than that of the 85 J/mm3 range *** multiplication and dislocation movement promoted by the residual stress were hindered by the initialα’phase grain boundary(prior-α’GB),leading to the formation ofα’metastable *** mean tensile strength and elongation of the 60 J/mm^(3) range specimens were 1248.1 MPa and 12.3%,respectively,whereas the corresponding values for the 85 J/mm^(3) range specimens were 1405.3 MPa,5.0%,*** deformation,the strength and ductility of the specimens were first improved by lamellar structures generated from prior-α’phases,and then effectively enhanced by the interaction between the{10–12}twins and ***,pores significantly reduced the ductility;hence,high VED specimens with large twins and numerous large pores increased the strength and reduce the ductility.

关键词： Laser powder bed fusion ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy Residual stress twin Mechanical properties

Conjugate natural convection of non-Newtonian hybrid nanofluid in wavy-shaped enclosure

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Applied Mathematics and Mechanics(English Edition) 2022年第3期43卷 447-466页

作者： S.HUSSAIN t.tAYEBI t.ARMAGHANI A.M.RASHAD H.A.NABWEY Department of Mathematics Capital University of Science and TechnologyIslamabad 44000Pakistan Lehrstuhl III Department of MathematicsTechnical University of DortmundDortmund 44227Germany Faculty of Sciences and technology University of Bordj Bou ArreridjEl-Anasser 34030Algeria Department of Engineering West Tehran BranchIslamic Azad UniversityTehran 11365Iran Department of Mathematics Aswan UniversityFaculty of ScienceAswan 81528Egypt Department of Mathematics College of Science and Humanities in Al-KharjPrince Sattam Bin Abdulaziz UniversityAl-Kharj 11942Saudi Arabia Department of Basic Engineering Science Faculty of EngineeringMenou¯a UniversityShebin El-Kom 32511Egypt

the present study concerns the modelization and numerical simulation for the heat and flow exchange characteristics in a novel configuration saturated with a nonNewtonian Ag-MgO hybrid *** wavy shaped enclosure is equipped with onequarter of a conducting solid *** system of equations resulting from the mathematical modeling of the physical problem in its dimensionless form is discretized via the higher-order Galerkin-based finite element method(GFEM).the dependency of various factors and their interrelationships affecting the hydro-thermal behavior and heat exchange rate are *** numerical experiments reveal that the best heat transfer rate is achieved for the pseudo-plastic hybrid nanoliquid with high Rayleigh number and thermal conductivity ratio and low Hartmann ***,the power-law index has a major effect in deteriorating the heat convection at high Rayleigh number.

关键词： natural convection waved-shaped cavity magnetic field hybrid nanofluid higher order finite element method(FEM)

Flow of Casson nanofluid with viscous dissipation and convective conditions: A mathematical model

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Journal of Central South University 2015年第3期22卷 1132-1140页

作者： t.HUSSAIN S.A.SHEHZAD A.ALSAEDI t.HAYAt M.RAMZAN Department of Mathematics Faculty of Computing Mohammad Ali Jinnah University Department of Mathematics Comsats Institute of Information Technology Department of Mathematics Faculty of Science King Abdulaziz University Department of Mathematics Quaid-i-Azam University

the magnetohydrodynamic(MHD) boundary layer flow of Casson fluid in the presence of nanoparticles is *** conditions of temperature and nanoparticle concentration are employed in the formulation. the flow is generated due to exponentially stretching surface. the governing boundary layer equations are reduced into the ordinary differential equations. Series solutions are presented to analyze the velocity, temperature and nanoparticle concentration fields. temperature and nanoparticle concentration fields decrease when the values of Casson parameter enhance. It is found that the Biot numbers arising due to thermal and concentration convective conditions yield an enhancement in the temperature and concentration fields. Further, we observed that both the thermal and nanoparticle concentration boundary layer thicknesses are higher for the larger values of thermophoresis parameter. the effects of Brownian motion parameter on the temperature and nanoparticle concentration are reverse.

关键词： nanoparticles Casson fluid concentration convective condition

On Injectors of a Hartley Set of a Finite Group

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Algebra Colloquium 2018年第4期25卷 671-680页

作者： Nanying Yang N.t.Vorob'ev t.B.Vasilevich School of Science Jiangnan UniversityWuxiJiangsu 214122China Department of Mathematics Masherov Vitebsk State University

Let G be a finite group andНbe a Hartley set of *** this paper,we prove the existence and conjugacy ofН-injectors of G and describe the characterization of injectors via *** applications,some known results are direc... 详细信息

关键词： Hartley set injector h-radical H-function

A new green process for biodiesel production from waste oils via catalytic distillation using a solid acid catalyst-Modeling, economic and environmental analysis

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Green Energy & Environment 2016年第1期1卷 62-74页

作者： Aashish Gaurav Flora t.t.Ng Garry L.Rempel Department of Chemical Engineering University of Waterloo

the challenges in the chemical processing industry today are environmental concerns, energy and capital costs. Catalytic distillation(CD) is a green reactor technology which combines a catalytic reaction and separation via distillation in the same distillation column. Utilization of CD in chemical process development could result in capital and energy savings, and the reduction of greenhouse gases. the efficacy of CD and the economic merits, in terms of energy and equipment savings, brought by CD for the production of biodiesel from waste oil such as yellow grease is quantified. Process flow sheets for industrial routes for an annual production of 10 million gallon AStM purity biodiesel in a conventional process(reactor followed by distillation) and CD configurations are modeled in Aspen Plus. Material and energy flows, as well as sized unit operation blocks, are used to conduct an economic assessment of each process. total capital investment, total operating and utility costs are calculated for each process. the waste oil feedstock is yellow grease containing both triglyceride and free fatty acid. Both transesterification and esterification reactions are considered in the process simulations. Results show a significant advantage of CD compared to a conventional biodiesel processes due to the reduction of distillation columns, waste streams and greenhouse gas emissions. the significant savings in capital and energy costs together with the reduction of greenhouse gases demonstrate that process intensification via CD is a feasible and new green process for the biodiesel production from waste oils.

关键词： Yellow grease Catalytic distillation Aspen plus economic analyzer Process intensification