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Frontiers of Environmental Science & Engineering 2018年第4期12卷 77-85页

作者： V. Edwin Geo Ankit Sonthalia fethi aioui Femilda Josephin J. S. Department of Automobile Engineering SRM Institute of Science and Technology Kattankulathur-603203 India Department of Mechanical and Automobile Engineering SRM Institute of Science and Technology NCR Campus~ Modinagar-201204 India Campus Mont Houy F-5931 LAMIH UMR CNRS 8201 Department of Mechanical Engineering University of Valenciennes (UVHC) Campus Mont-Houy F-59313 Valenciennes Cedex 9 France Department of Software Engineering SRM Institute of Science and Technology Kattankulathur-603203 India

Utilizing oil extracted from waste engine oil and waste plastics, by pyrolysis, as a filel for internal combustion engines has been demonstrated to be one of the best available waste management methods. Separate blends of fuel from waste engine oil and waste plastic oil was prepared by mixing with diesel and experimental investigation is conducted to study engine performance, combustion and exhaust emissions. It is observed that carbon monoxide （CO） emission increases by 50% for 50% waste plastic oil （50WPO：50D） and by 58% for 50% waste engine oil （50WEO：50D） at full load as compared to diesel. Unburnt hydrocarbon （HC） emission increases by 16% for 50WPO：50D and by 32% for 50WEO：50D as compared to diesel at maximum load. Smoke is fotmd to decrease at all loading conditions for 50WPO：50D operation, but it is comparatively higher for 50WEO：50D operation. 50WPO：50D operation shows higher brake thermal efficiency for all loads as compared to 50WEO：50D and diesel fuel operation. Exhaust gas temperature is higher at all loads tbr 50WPO：50D and 50WEO：50D as compared to diesel fuel operation.

关键词： Waste engine Oil Waste plasti Oil Diesel fuelPyrolysis Compression engine

Laeng-Morpurgo-Type Uncertainty Inequalities for the Laguerre Transform

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Journal of Mathematical Research with Applications 2022年第1期42卷 8-14页

作者： fethi SOLTANI Faculté des Sciences de Tunis Laboratoire d’Analyse Mathématique et Applications LR11ES11Université de Tunis El Manar Ecole Nationale d’Ingénieurs de Carthage Université de Carthage

In this work,we prove Clarkson-type and Nash-type inequalities for the Laguerre transform■ on M=[0,∞)×*** combining these inequalities,we show Laeng-Morpurgo-type uncertainty *** establish also a local-type uncertainty inequalities for the Laguerre transform ■,and we deduce a Heisenberg-Pauli-Weyl-type inequality for this transform.

关键词： Laeng-Morpurgo-type inequality local-type inequality Heisenberg-Pauli-Weyl-type inequality

Novel Machine Learning–Based Approach for Arabic Text Classification Using Stylistic and Semantic Features

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Computers, Materials & Continua 2023年第6期75卷 5871-5886页

作者： fethi Fkih Mohammed Alsuhaibani Delel Rhouma Ali Mustafa Qamar Department of Computer Science College of ComputerQassim UniversityBuraydahSaudi Arabia MARS Research Lab LR17ES05 University of SousseSousseTunisia

Text classification is an essential task for many applications related to the Natural Language Processing *** can be applied in many fields,such as Information Retrieval,Knowledge Extraction,and Knowledge *** though the importance of this task,Arabic Text Classification tools still suffer from many problems and remain incapable of responding to the increasing volume of Arabic content that circulates on the web or resides in large *** paper introduces a novel machine learning-based approach that exclusively uses hybrid(stylistic and semantic)***,we clean the Arabic documents and translate them to English using translation ***,the semantic features are automatically extracted from the translated documents using an existing database of English ***,the model automatically extracts from the textual content a set of stylistic features such as word and character frequencies and ***,we obtain 3 types of features:semantic,stylistic and *** each time,a different type of feature,we performed an in-depth comparison study of nine well-known Machine Learning models to evaluate our approach and used a standard Arabic *** obtained results show that Neural Network outperforms other models and provides good performances using hybrid features(F1-score=0.88%).

关键词： Arabic text classification machine learning stylistic features semantic features topics

Theory and Applications of Distinctive Conformable Triple Laplace and Sumudu Transforms Decomposition Methods

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Journal of Partial Differential Equations 2022年第1期35卷 49-77页

作者： BHANOTAR Shailesh A BELGACEM fethi Bin Muhammad Department of Mathematics LJIETL J UniversityAhmedabadGujaratIndia Department of Mathematics Faculty of Basic EducationPAAETAl-ArdiyaKuwait

This article presents some important results of conformable fractional partial *** conformable triple Laplace and Sumudu transform are coupled with the Adomian decomposition method where a new method is proposed to solve nonlinear partial differential equations in ***,mathematical experiments are provided to verify the performance of the proposed method.A fundamental question that is treated in this work:is whether using the Laplace and Sumudu transforms yield the same results?This question is amply answered in the realm of the proposed applications.

关键词： Riemann-Liouville fractional integral fractional derivative Adomian decomposition method conformable fractional partial derivative conformable triple Laplace and Sumudu transform

MULTIPLIER OPERATORS AND EXTREMAL FUNCTIONS RELATED TO THE DUAL DUNKL-SONINE OPERATOR

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Acta Mathematica Scientia 2013年第2期33卷 430-442页

作者： fethi SOLTANI Higher College of Technology and Informatics Street of the Employers 45Charguia 2 - 2035 TunisTunisia

We study the dual Dunkl-Sonine operator tSk,e on Rd and give expression of tSk,t, using Dunkl multiplier operators on Rd, Next, we study the extremal functions fλ, λ〉 0 related to the Dunkl multiplier operators, and more precisely show that {fλ}λ〉0 converges uniformly to tSk,e（f） as λ→0 Certain examples based on Dunkl-heat and Dunkt-Poisson kernels are provided to illustrate the results.

关键词： Dunkl transform dual Dunkl-Sonine operator multiplier operators extremalfunction

OPTIMIZATION APPROACH FOR THE MONGE-AMPèRE EQUATION

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Acta Mathematica Scientia 2018年第4期38卷 1285-1295页

作者： fethi BEN BELGACEM Department of Mathematics Laboratoire EDP ( LRO3ESO4) Faculty of Sciences of Tunis 1060 Tunis Tunisia

In this paper, we introduce and study a method for the numerical solution of the elliptic Monge-Ampere equation with Dirichlet boundary conditions. We formulate the Monge-Ampere equation as an optimization problem. The latter involves a Poisson Problem which is solved by the finite element Galerkin method and the minimum is computed by the conjugate gradient algorithm. We also present some numerical experiments.

关键词： elliptic Monge-Ampere equation gradient conjugate method finite element Galerkin method

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

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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

Finite difference analysis of an advance core pre-reinforcement system for Toulon's south tube

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Journal of Rock Mechanics and Geotechnical Engineering 2016年第5期8卷 703-713页

作者： fethi kitchah sadok benmebarek MN2I2S Laboratory Department of Civil and Hydraulic EngineeringBiskra UniversityBiskra 07000Algeria

The stability of shallow tunnels excavated in full face has been a major challenge to the scientific community for a long time. In recent years, new techniques based on the installation of a pre-reinforcement system ahead of the tunnel face were developed to control the deformations and surface settlements induced by the excavation and to ensure the sustainability of the tunnel in the long term. In this paper, a finite difference numerical simulation was conducted to study the behaviors and effects of two pre-reinforcement systems, i.e. the face bolting and the umbrella arch system installed in a section of southern Toulon tunnel in France. For this purpose, two approaches were taken and compared： a two-dimensional （2D） approach based on the convergence–confinement method, and a three-dimensional （3D） approach taking into account the complete modeling of the tunnel. A 2D numerical back-analysis was performed to identify the geomechanical parameters that offer satisfactory agreement with the measurement results. The limit of this method lies in the exact choice of the stress relaxation ratio λ. To overcome this uncertainty, a 3D model was developed, which permitted to study the influence of different pre-support systems on the reaction of ground mass. Both 2D and 3D numerical approaches have been fitted to measurements recorded in a section of the Toulon tunnel and the very satisfactory correspondence has allowed validating the simulations. The results show that the 3D numerical analysis with a full discretization of the inclusions seems unquestionably the most reliable approach.

关键词： Face bolting Numerical modeling Pre-reinforcement Stress relaxation ratio Umbrella arch

Dunkl Multiplier Operators on a Class of Reproducing Kernel Hilbert Spaces

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Journal of Mathematical Research with Applications 2016年第6期36卷 689-702页

作者： fethi SOLTANI Department of Mathematics Faculty of ScienceJazan University

We study some class of Dunkl multiplier operators;and we establish for them the Heisenberg-Pauli-Weyl uncertainty principle and the Donoho-Stark’s uncertainty *** these operators we give also an application of the th... 详细信息

关键词： Sobolev-Dunkl spaces Dunkl multiplier operators Heisenberg-Pauli-Weyl uncertainty principle Donoho-Stark uncertainty principle Tikhonov regularization extremal functions

Uncertainty Principles for the Segal-Bargmann Transform

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Journal of Mathematical Research with Applications 2017年第5期37卷 563-576页

作者： fethi SOLTANI Department of Mathematics Faculty of Science Jazan University

We recall some properties of the Segal-Bargmann transform; and we establish for this transform qualitative uncertainty principles: local uncertainty principle, Heisenberg uncertainty principle, Donoho-Stark’s uncerta... 详细信息

关键词： Segal-Bargmann space Segal-Bargmann transform local uncertainty principle Heisenberg uncertainty principle Donoho-Stark’s uncertainty principle