检索结果-南通市图书馆

The Application of Educational Technologies to Facilitate Effective Teaching and Learning at a Teacher's College in tanzania

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Application of Educational Technologies to Facilitate Ef...

作者： MSELE mohamed MSERE（ma YANG）郑州大学

学位级别：硕士

The aim of this study was to scrutinize the application of educational technologies to facilitate effective teaching and learning at a teacher’s college in *** study focused on the following aspects:to identify the commonly used technological tools in teaching and learning activities,teachers’perceptions on using technological tools in teaching and learning,then to recognize challenges teachers facing when using educational technology in teaching and learning and then to offer solutions for the *** study was based on two theories which are Modern Educational Technology Theory and Diffusion of Innovations（DOI）***,the Modern Educational Technology Theory emphases on the design,effective use,management and evaluation of the learning *** this study this theory is very useful because it helps instructors to employ technological facilities in teaching and learning ***,Diffusion of Innovation（DOI）Theory classifies the transfer of information and adopted by different groups of *** groups identified in the theory are innovators,early adopters,early majority and ***,the theory is very important in this study because it specifies different groups of people who are engaged to use technology,therefore it inspires educators and learners to use *** findings of the study indicated that computer,smartphone and overhead projector are the commonly used technological tools in teaching and learning *** means computer,smartphone and overhead project are frequently available and used in teaching and learning *** educational instructors and learners’perceptions on using technological tools the study found that,technological tools are very important to facilitate effective teaching and *** challenges are,scarcity of technological devices,insufficient experts of Information and Communication Technologies（ICT）,poor network connection,low level of knowledge for students in usi

关键词： educational,classroom,technological,college,facilities,motivation,courses,lesson,learner,competence,

Real-time stereo matching on CUDA using Fourier descriptors and dynamic programming

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Computational Visual Media 2019年第1期5卷 59-71页

作者： mohamed Hallek Fethi Smach mohamed Atri Faculty of Sciences of Monastir Technologies et services de l'information

Computation of stereoscopic depth and disparity map extraction are dynamic research topics.A large variety of algorithms has been developed,among which we cite feature matching, moment extraction, and image representation using descriptors to determine a disparity map. This paper proposes a new method for stereo matching based on Fourier descriptors. The robustness of these descriptors under photometric and geometric transformations provides a better representation of a template or a local region in the image. In our work, we specifically use generalized Fourier descriptors to compute a robust cost ***, a box filter is applied for cost aggregation to enforce a smoothness constraint between neighboring pixels. Optimization and disparity calculation are done using dynamic programming, with a cost based on similarity between generalized Fourier descriptors using Euclidean distance. This local cost function is used to optimize correspondences. Our stereo matching algorithm is evaluated using the Middlebury stereo benchmark; our approach has been implemented on parallel high-performance graphics hardware using CUDA to accelerate our algorithm, giving a real-time implementation.

关键词： generalized Fourier descriptors stereo matching dynamic programming CUDA

A robust multi-objective and multi-physics optimization of multi-physics behavior of microstructure

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University 2016年第12期23卷 3225-3238页

作者： Hamda Chagraoui mohamed Soula mohamed Guedri Research Unit in Structural Dynamics Modeling and Engineering of Multi-Physics SystemsSDMESMNabeul Preparatory Engineering Institute-IPEINUniversity of Carthage Laboratory of Applied Mechanics and Engineering ENITDepartment of Mechanical engineering ENSITTunis University of Tunisia

A new strategy is presented to solve robust multi-physics multi-objective optimization problem known as improved multi-objective collaborative optimization （IMOCO） and its extension improved multi-objective robust collaborative （IMORCO）. In this work, the proposed IMORCO approach combined the IMOCO method, the worst possible point （WPP） constraint cuts and the Genetic algorithm NSGA-II type as an optimizer in order to solve the robust optimization problem of multi-physics of microstructures with uncertainties. The optimization problem is hierarchically decomposed into two levels： a microstructure level, and a disciplines levels, For validation purposes, two examples were selected： a numerical example, and an engineering example of capacitive micro machined ultrasonic transducers （CMUT） type. The obtained results are compared with those obtained from robust non-distributed and distributed optimization approach, non-distributed multi-objective robust optimization （NDMORO） and multi-objective collaborative robust optimization （McRO）, respectively. Results obtained from the application of the IMOCO approach to an optimization problem of a CMUT cell have reduced the CPU time by 44% ensuring a Pareto front close to the reference non-distributed multi-objective optimization （NDMO） approach （mahalanobis distance, D2M =0.9503 and overall spread, So=0.2309）. In addition, the consideration of robustness in IMORCO approach applied to a CMUT cell of optimization problem under interval uncertainty has reduced the CPU time by 23% keeping a robust Pareto front overlaps with that obtained by the robust NDMORO approach （D2M =10.3869 and So=0.0537）.

关键词： multi-physics multi-objective optimization robust optimization collaborative optimization non-distributed anddistributed optimization uncertainty interval

Static and dynamic stability responses of multilayer functionally graded carbon nanotubes reinforced composite nanoplates via quasi 3D nonlocal strain gradient theory

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2022年第10期18卷 1778-1809页

作者： Ahmed Amine Daikh mohamed Sid Ahmed Houari mohamed Ouejdi Belarbi Salwa A.mohamed mohamed A.Eltaher Laboratoire D'Etude des Structures et de Mecanique des materiaux Departement de Genie CivilFacultedes Sciences et de La TechnologieUniversite Mustapha Stambouli B.P.305R.P.29000MascaraAlgeria Laboratoire de Genie Energetique et materiaux LGEMUniversite de BiskraB.P.145R.P07000BiskraAlgeria Department of Engineering mathematics Zagazig UniversityP.O.Box 44519ZagazigEgypt Faculty of Engineering Mechanical Engineering DepartmentKing Abdulaziz UniversityP.O.Box 80204JeddahSaudi Arabia Faculty of Engineering Mechanical Design and Production DepartmentZagazig UniversityP.O.Box 44519ZagazigEgypt

This manuscript presents the comprehensive study of thickness stretching effects on the free vibration,static stability and bending of multilayer functionally graded(FG)carbon nanotubes reinforced composite(CNTRC)*** nanoscale and microstructure influences are considered through a modified nonlocal strain gradient continuum *** on power-law functions,four different patterns of CNTs distribution are considered in this analysis,a uniform distribution UD,FG-V CNTRC,FG-X CNTRC,and FG-O CNTRC.A 3D kinematic shear deformation theory is proposed to include the stretching influence,which is neglected in classical ***'s principle is applied to derive the governing equations of motion and associated boundary *** solutions are developed based on Galerkin method to solve the governing equilibrium equations based on the generalized higher-order shear deformation theory and the nonlocal strain gradient theory and get the static bending,buckling loads,and natural frequencies of *** with previous works is presented.A detailed parametric analysis is carried out to highlight the impact of thickness stretching,length scale parameter(nonlocal),material scale parameter(gradient),CNTs distribution pattern,geometry of the plate,various boundary conditions and the total number of layers on the stresses,deformation,critical buckling loads and vibration *** new results are also reported in the current study,which will serve as a benchmark for future research.

关键词： 3D shear deformation theory Free vibration Buckling Bending Galerkin method Functionally graded nanotube Nonlocal strain gradient theory

Recent advancements in plasmon-enhanced visible light-driven water splitting

在线全文

学校读者我要写书评

暂无评论

Journal of materiomics 2017年第1期3卷 33-50页

作者： Qingzhe Zhang Deepak Thrithamarassery Gangadharan Yanlong Liu Zhenhe Xu mohamed Chaker Dongling ma Institut National de la Recherche Scientifique(INRS) CentreÉnergie Materiaux et TélécommunicationsUniversitédu Québec1650 Boulevard Lionel-BouletVarennesQuébecJ3X 1S2Canada The Key Laboratory of Inorganic Molecule-Based Chemistry of Liaoning Province College of Applied ChemistryShenyang University of Chemical TechnologyShenyang110142China

Recently,the combination of plasmonic noble metallic nanostructures with semiconductors for plasmonenhanced visible light-driven water splitting(WS)has attracted considerable *** review first presents three prime enhancement mechanisms for plasmon-enhanced photocatalytic WS,and then some state-of-the-art representative studies are introduced according to different enhancement ***,the design parameters of plasmonic-metal/semiconductor photocatalysts are discussed in detail,focusing on the effect of shape,size and geometric position of metallic nanostructures on the photocatalytic activity of visible light-driven ***,the challenges and perspectives for plasmon-enhanced solar WS are proposed.

关键词： Surface plasmon resonance Water splitting Visible light photocatalysis

Mild Solutions of a Class of Conformable Fractional Differential Equations with Nonlocal Conditions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta mathematicae Applicatae Sinica 2023年第2期39卷 249-261页

作者： mohamed BOUAOUID Sultan Moulay Slimane University Faculty of Sciences and TechnicsDepartment of MathematicsBP 52323000Beni MellalMorocco

This paper deals with the existence,uniqueness and continuous dependence of mild solutions for a class of conformable fractional differential equations with nonlocal initial *** results are obtained by means of the cl... 详细信息

关键词： fractional partial differential equations fractional derivatives and integrals cosine family of linear operators nonlocal conditions

Heat transfer of copper/water nanofluid flow through converging-diverging channel

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University 2016年第2期23卷 484-496页

作者： mohamed Rafik SARI mohamed KEZZAR Rachid ADJABI Mechanical Engineering Department University of Skikda Industrial Mechanics Laboratory Badji-Mokhtar University of Annaba

The main objective of this work is to investigate analytically the steady nanofluid flow and heat transfer characteristics between nonparallel plane walls. Using appropriate transformations for the velocity and temperature, the basic nonlinear partial differential equations are reduced to the ordinary differential equations. Then, these equations have been solved analytically and numerically for some values of the governing parameters, Reynolds number, Re, channel half angle, α, Prandtl number, Pr, and Eckert number, Ec, using Adomian decomposition method and the Runge-Kutta method with mathematic package. Analytical and numerical results are searched for the skin friction coefficient, Nusselt number and the velocity and temperature profiles. It is found on one hand that the Nusselt number increases as Eckert number or channel half-angle increases, but it decreases as Reynolds number increases. On the other hand, it is also found that the presence of Cu nanoparticles in a water base fluid enhances heat transfer between nonparallel plane walls and in consequence the Nusselt number increases with the increase of nanoparticles volume fraction. Finally, an excellent agreement between analytical results and those obtained by numerical Runge-Kutta method is highly noticed.

关键词： nanofluid flow heat transfer copper nanoparticles inclined walls analytical solution

Completed Tensor Product and Flatness

在线全文

学校读者我要写书评

暂无评论

Algebra Colloquium 2020年第3期27卷 599-606页

作者： mohamed tabaa Department of mathematics Faculty of Sciences Mohammed v University in RabatMorocco

We give,in a more general case than the Noetherian case,an answer to the question posed by Shaul on the flatness of the completed tensor product.

关键词： preadic topology completed tensor product coherent ring flat module

A Survey of Racks and Quandles:Some Recent Developments

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Algebra Colloquium 2020年第3期27卷 509-522页

作者： mohamed Elhamdadi Department of mathematics University of South Florida TampaFL 33620USA

This short survey contains some recent developments of the algebraic theory of racks and *** report on some elements of representation theory of quandles and ring theoretic approach to quandles.

关键词： rack quandle representation ring isomorphism