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Optimal Control Approach for a Smart Grid
Imen Amdouni,Naziha Labiadh,Lilia El amraoui International Journal of Computer ScienceNetwork S 2023 International journal of computer science and netw Vol.23 No.12
The current electricity networks will undergo profound changes in the years to come to be able to meet the growing demand for electricity, while minimizing the costs of consumers and producers, etc. The electricity network of tomorrow or even the intelligent « Smart Grids » network will be the convergence of two networks: the electricity network and the telecommunications network. In this context falls our work which aims to study the impact of the integration of energy decentralization into the electricity network. In this sense, we have implemented a new smart grid model where several coexisting suppliers can exchange information with consumers in real time. In addition, a new approach to energy distribution optimization has been developed. The simulation results prove the effectiveness of this approach in improving energy exchange and minimizing consumer purchase costs and line losses.
PRACTICAL OBSERVER FOR IMPULSIVE SYSTEMS
Imen Ellouze 대한수학회 2014 대한수학회지 Vol.51 No.1
In this paper, we deal with the problem of practical observer design and the practical stabilization for a class of perturbed impulsive systems. We show that, under the classical conditions of uniform complete controllability and uniform complete observability of the nominal system without impulsive effects, it is possible to design an observer controller for a class of perturbed linear impulsive system when the origin is not an equilibrium point.
Development and Surface State Characterization of a Spacer Waterproof Breathable Fabric
Imene Ghezal,Ali Moussa,Imed Ben Marzoug,Ahmida El-Achari,Christine Campagne,Faouzi Sakli 한국섬유공학회 2020 Fibers and polymers Vol.21 No.4
This research reports the designing and the optimization of a waterproof breathable fabric. A new waterproofbreathable fabric made by coating a double sided spacer knit with a mixture of an acrylic paste and a fluorocarbon resin ispresented. The treated fabric can be used for producing outdoor garments. The surface states of treated samples werecharacterized by using the assessment of the coating add-on (%), water contact angle (o), surface free energy (mN·m-1), androughness (mm). The main coating process parameters were studied by using the Box-Behnken experimental design. It wasproved that the quantity of acrylic paste (g·m-2) and the reticulation time (min) have the most significant effect on the coatingadd-on value (%). The surface free energy (mN·m-1) is affected by the three studied factors. Roughness was also evaluatedbefore and after the coating treatment. However, no significant variation in values was noticed. Optimum responses areobtained with 2.71 % of fluorocarbon resin, 412.00 g·m-2 of acrylic paste, and a reticulation time equal to 13.52 minutes. Optimized values for the coating add-on, SFE, and roughness are equal to 79.716 %, 29.17 mN·m-1, and 0.058 mm,respectively.
On characterizing the gamma and the beta $q$-distributions
Imen Boutouria,Imed Bouzida,Afif Masmoudi 대한수학회 2018 대한수학회보 Vol.55 No.5
In this paper, our central focus is upon gamma and beta $q$-distributions from a probabilistic viewpoint. The gamma and the beta $q$-distributions are characterized by investing the nature of the joint $q$-probability density function through the $q$-independence property and the $q$-Laplace transform.
Formulation of continuous element of prestressed stiffened circular cylindrical shell
Imene Harbaoui,Mohamed Amine Khadimallah,Abdelhakim Benslimane,Guoyong Jin,Ömer Civalek 국제구조공학회 2021 Steel and Composite Structures, An International J Vol.41 No.4
This paper presents a dynamic analysis of a prestressed stiffened circular cylindrical shell subjected to external distributed pressure using the dynamic stiffness method. This approach is based on the first order shear deformation theory founded on love’s first approximation theory. Natural frequencies are easily processed. The dynamic stiffness matrix has been built. The formulation of this element requires coupling pre-stressed shell and circumferential stiffener. The vibration analysis is performed with numerical examples to determine the performance of this model and the effect of presetress and stiffener on the frequency spectrum. The response of the system is determined with applied equivalent loads on element boundaries. Compared to the finite element method, the proposed element has many advantages such as the model size, the computing time, the accuracy and the higher precision.
Imen Gueddi,Othman Nasri,Kamal Benothman,Philippe Dague 제어·로봇·시스템학회 2017 International Journal of Control, Automation, and Vol.15 No.2
This paper presents a new interval diagnosis method to detect and isolate actuators faults of an autonomousspacecraft involved in the rendez-vous phase of the Mars Sample Return (MSR) mission. The proposeddiagnosis approach is based on the Vertices Principal Component Analysis (VPCA) as an extension of the classicalPCA method to interval data. To ensure the feasibility of the proposed Fault Detection and Isolation (FDI) approach,a set of interval data provided by the MSR “high-fidelity” industrial simulator and representing the opening rates ofthe spacecraft thrusters has been considered. The results have proven the efficiency of the proposed FDI approachin the diagnosing process assuring the detection and the isolation of both single and multiple faults.
Imene Ait Sidhoum,Djilali Boutchicha,Samir Benyoucef,Abdelouahed Tounsi 국제구조공학회 2018 Smart Structures and Systems, An International Jou Vol.22 No.3
An original quasi-3D hyperbolic shear deformation theory for simply supported functionally graded plates is proposed in this work. The theory considers both shear deformation and thickness-stretching influences by a hyperbolic distribution of all displacements within the thickness, and respects the stress-free boundary conditions on the upper and lower surfaces of the plate without using any shear correction coefficient. By expressing the shear parts of the in-plane displacements with the integral term, the number of unknowns and equations of motion of the proposed theory is reduced to four as against five in the first shear deformation theory (FSDT) and common quasi-3D theories. Equations of motion are obtained from the Hamilton principle. Analytical solutions for dynamic problems are determined for simply supported plates. Numerical results are presented to check the accuracy of the proposed theory.
Imen Metoui 대한수학회 2024 대한수학회논문집 Vol.39 No.1
In this paper, we give sufficient conditions for the generalized Ornstein-Uhlenbeck operators perturbed by regular potentials and inverse square potentials \begin{align*} A_{\Phi,G,V,c} = \Delta-\nabla \Phi\cdot\nabla+G\cdot \nabla-V+c|x|^{-2} \end{align*} with a suitable domain generates a quasi-contractive, positive and analytic $C_{0}$-semigroup in $L^{p}(\mathbb{R}^{N},e^{-\Phi(x)}dx)$, $1<p<\infty$. The proofs are based on an $L^{p}$-weighted Hardy inequality and perturbation techniques. The results extend and improve the generation theorems established by Metoui \cite{122} and Metoui--Mourou \cite{12}.
A new genetic algorithm for flexible job-shop scheduling problems
Imen Driss,Kinza Nadia Mouss,Assia Laggoun 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.3
Flexible job-shop scheduling problem (FJSP), which is proved to be NP-hard, is an extension of the classical job-shop schedulingproblem. In this paper, we propose a new genetic algorithm (NGA) to solve FJSP to minimize makespan. This new algorithm uses a newchromosome representation and adopts different strategies for crossover and mutation. The proposed algorithm is validated on a series ofbenchmark data sets and tested on data from a drug manufacturing company. Experimental results prove that the NGA is more efficientand competitive than some other existing algorithms.
Imene Trabelsi Trigui,Georges Giraud 한국마케팅과학회 2012 마케팅과학연구 Vol.22 No.2
Consumers’ fears and anxiousness, triggered by recent food scares and crises, and technological developments such as GMOs, have led to serious concerns about food safety, ever-increasing demands for quality assurance, more information about product origin food labels, and more particularly designation-of-origin labels, such as PDO (protected designation of origin) and PGI (protected geographic indication). Region of origin food labels have become increasingly frequent and apposed to a large variety of food products. The objective of this study is to analyze consumer preferences towards labeled food products on the basis of a consumer scanned data panel.