Publications Scientifiques

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Start date: 2020Has files: No

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    Modeling and Optimization of the Compressive Strength of an Alkali-Activated Material Using a Mixed Full Factorial Design
    (2025) Arezki, Sarri; Oualit, Mehena; Cherfi, Abdelhamid
    The aim of the present work is to carry out a technical study on blast furnace slag based-alkali-activated binders, using design of experiments methodology. A four-factor, mixed-level (two and three) full factorial design was employed to evaluate and model the significance and interactions of 4 independent factors on the compressive strength: curing environment, activator type (Alkali silicate (AS) and Alkali hydroxide (AH)), activator content and curing time. The experimental compressive strength data were adequately fitted by empirical models with determination coefficients (R2) of 0.89 and 0.93 for AS and AH activators, respectively. The most significant effects of factors on the compressive strength are classed according to this order: Curing time > Activator to precursor mass ratio > Curing temperature for the AS case and Curing temperature > Activating solution concentration > curing time, for the AH case. The most favorable situation corresponding to maximum compressive strength is obtained with a minimum curing temperature of 20 °C, an activator-to-precursor mass ratio of 0.42, and a maximum curing duration of 28 days, for a desirability value of 0.95, in the case of the AS activator. When using the AH activator: a Desirability function-based optimization targeting a compressive strength above 50 MPa showed that this could be achieved beyond 16 days of curing, with a minimum concentration of the alkaline solution worth 5M (considering its corrosive nature), and a medium temperature representative of North African countries (≈ °C), for a desirability value of 0.35.
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    BiMnO3 thin films synthesized by sol-gel method: Efficient photocatalytic dye degradation and hydrogen production under sunlight and visible light
    (Elsevier, 2026) Allouane, Ouiza; Toubane, Mahdia; Tala-Ighil, Razika; Beldjoudi, Nadir; Ayouz, Katia; Chabira, Fares; Boudinar, Salem; Tazerout, Mohand; Douali, Redouane
    In this work, BiMnO3 (BMO) thin films with different thicknesses (3, 5, 7, and 9layers) were successfully fabricated on glass substrates via the dip-coating technique. These BMO thin films were characterized using various techniques. X-ray diffraction analysis reveals that the as-deposited films exhibit a monoclinic phas. The crystallite size varies from 17.79 to 9.09 nm, while the roughness increases from 13.97 to 54.70 nm as the film thickness increases. UV–Visible spectroscopy measurements indicate an increase in light absorption with increasing film thickness, rising from 0.53 for 3 layers to 0.74 for 9 layers. DFT calculations indicate a direct band gap of 1.97 eV, in good agreement with the 1.62–1.81 eV values obtained from the Tauc method. BMO thin films exhibit high photocurrent densities compared to literature values, reaching 11.1 mA/cm² under visible light. The photocatalytic degradation of methylene blue (MB) by the BMO thin films increased with thickness, reaching ∼94% after 180 min under sunlight. This work will promote the development of highly efficient BMO, highlighting its potential for environmental applications
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    Software-in-the-Loop Validation of a PEC9-Based Multifunction Solar Active Filter
    (IEEE, 2026) Khettab, Soufian; Kasri, Amel; Belkhier, Youcef; Kheldoun, Aissa; Benbouzid, Mohamed
    This paper presents a novel double-stage, singlephase photovoltaic (PV) system for grid connection and active power filtering, employing a Packed E-Cell nine-level (PEC9) inverter. The proposed architecture offers an integrated solution for harmonic mitigation, reactive power compensation, and maximum power extraction from the PV source, while ensuring efficient real power injection into the grid. A modified instantaneous power (P-Q) algorithm is developed to enhance dynamic performance by generating a reference current that combines both harmonic and solar power components. This reference current is accurately tracked using Model Predictive Control (MPC) strategy applied to the PEC9 inverter, ensuring precise and fast control. The system's performance is validated through software-in-the-loop (SIL) simulation using RT-LAB, demonstrating its effectiveness under realistic operational conditions. The results confirm significant improvements in total harmonic distortion (THD) reduction, unity power factor operation, maximum power tracking, and overall dynamic response. These findings highlight the potential of the proposed PEC9-based multifunction solar active filter as an efficient and reliable solution for enhancing power quality in grid-connected PV systems
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    Optimization of Selective Harmonic Elimination for Emerging Single-Phase Five-Level Inverter Using Genetic Algorithm
    (IEEE, 2026) Maamar, Alla Eddine Toubal; Naidji, Mourad; Abdelouahed, Touhami; Boudouda, Aimad; Porumb, Radu; Mekhilef, Saad
    This study focuses on the analysis and experimental investigation of Selective Harmonic Elimination (SHE) for emerging single-phase multilevel inverter using Genetic Algorithm (GA), among the best algorithms for optimization. The employed inverter, a widely adopted emerging topology, uses fewer switches than conventional designs while delivering a five-level output voltage. GA solves transcendental nonlinear equations to find SHE's optimal commutation angles. Simulation outcomes closely align with theoretical predictions, demonstrating the method's simplicity compared to analytical techniques, suitability for inverter control, and cost-effectiveness for real-time implementation on a low-cost Arduino ATmega2560 Microcontroller. Theoretical analysis is validated through MATLAB/Simulink simulations and a hardware prototype built with efficient electronic components. Both simulation and experimental findings validate the resilience and efficacy of the presented modulation technique for emerging single-phase five-level inverters
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    Additive Manufacturing in Industry 4.0: Role and Impact
    (IEEE, 2026) Mezahem, Sid Ahmed Rayane; Chabane, Ali; Benfriha, Khaled; Titri, Wali Eddine; Amrane, Ahmed
    Additive manufacturing (AM), commonly referred to as 3D printing (3DP), is a leading-edge technology that is significantly influencing the development of Industry 4.0. The importance of AM technologies is attributed to their capacity to revolutionize conventional manufacturing practices via improved customization, production on demand, and efficient use of materials. With applications spanning sectors such as aerospace, health-care and automotive, 3DP is proving to be a cornerstone in the era of smart and sustainable manufacturing, these technologies have been widely researched and implemented to produce homogeneous and heterogeneous products with complex geometries. This article addresses the role of AM within Industry 4.0, highlighting its integration with the latest technological developments in cyber-physical systems, digital twins, the Internet of Things, cloud computing, cognitive computing, and artificial intelligence. In consideration of these advances, we try to provide a holistic understanding of how AM drives innovation, optimizes processes, and contributes to the realization of intelligent manufacturing systems. Industry 4.0 uses a series of enabling technologies that can be categorized into nine pillars. These are the technologies that have the most applications under the industry 4.0 umbrella. However, some works have added another pillar known as ’other enabling technologies’ that has limited applications in agro-foods, bio-based economics, and energy consumption.
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    Digital Twin Development for the MAP-205 SMC Assembly Mini Cell: A Use Case Approach
    (IEEE, 2026) Bibani, Yasser; Ghazi, Nawel; Chabane, Ali; Benfriha, Khaled
    he first stage of creating a digital twin for the MAP-205 SMC assembly mini-cell, a tabletop mechatronic system used for industrial automation instruction, is covered in this paper. Building a working virtual model of the mini-cell was the primary goal in order to facilitate the future integration of Industry 4.0 technology. In order to create an interactive simulation environment, a comprehensive 3D CAD model of the system was created using SolidWorks and loaded into the Unity game engine. Early component visualization and functional testing are made possible by simulation’s replication of the physical system’s fundamental mechanical processes and assembly sequence. Predictive maintenance capabilities, IoT connectivity, and real-time sensor data integration are not yet included in the project stage
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    EFFECT OF STEEL FIBERS ON THE RHEOLOGICAL AND MECHANICAL PROPERTIES OF SELF-COMPACTING CONCRETE WITH TUFF POWDER
    (Fundatia Serban Solacolu, 2026) Naadia, Tarek; Gueciouer, Djamila; Ghernouti, Youcef; Mansour, Mali̇Ka Sabri̇a
    This experimental study focuses on the development of a steel fiber-reinforced self-compacting concrete (SFSCC) incorporating tuff powder as a local mineral addition. Five mixes were evaluated to assess the influence of fiber dosage on both fresh and hardened properties. The incorporation of steel fibers leads to reduced workability and longer flow times but significantly enhances the stability of the mix by minimizing segregation risks. Mechanically, the addition of fibers results in a marked improvement in flexural strength, with gains exceeding 40% at the highest fiber content. Ductility is substantially increased, reflecting a better ability to absorb post-cracking energy. In contrast, compressive strength shows only a moderate increase, around 11%, confirming that the main contribution of fibers lies in flexural behavior and toughness. The porous texture and pozzolanic activity of the tuff promote strong fiber–matrix bonding, contributing to improved cohesion and crack control. Overall, the findings highlight the feasibility of producing a high-performance, ductile, and stable self-compacting concrete using local resources, offering a sustainable and efficient solution for modern construction needs. © (2025), (Fundatia Serban Solacolu). All rights reserved.
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    Experimental Implementation of FS-Predictive Current Control with MPPT-OTC for Performance Optimization of PMSG-Based Wind Energy Systems
    (IEEE, 2026) Sayhi, Hicham; Bourek, Amor; Ammar, Abdelkarim; Teta, Ali; Bakria, Derradji; Chennana, Ahmed
    This study proposes a predictive current control strategy for standalone wind energy conversion systems (WECSs) based on permanent magnet synchronous generators (PMSGs). The approach integrates finite-set predictive current control (FS-PCC) with an optimal-torque-control (OTC) MPPT algorithm to achieve accurate stator current regulation, reduced ripple, and improved dynamic response under variable wind conditions. Experimental tests on a 3kW setup using the dSPACE 1104 platform validate the controller's fast transient behavior, stable standalone operation, and enhanced energy extraction efficiency, demonstrating robust performance in stochastic wind environments
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    IoT integration for predictive maintenance within an industry 4.0 infrastructure
    (IEEE, 2026) Bourkab, Hayet; Chabane, Ali; Boudhar, Hamza; Benfriha, Khaled
    Industry 4.0 is transforming industries by integrating advanced technologies to create smart factories where machines, devices, and systems are interconnected. In this context, maintenance practices are evolving to ensure the reliability and efficiency of these interconnected systems, known as cyber-physical systems. Predictive maintenance, a proactive strategy, has emerged as a key solution to prevent unplanned downtime and optimize industrial operations. This article presents a literature review on the integration of the Internet of Things (IoT) into predictive maintenance, focusing on how IoT devices collect real time data from equipment and how this data is analyzed using artificial intelligence (AI) and machine learning (ML) techniques. This article examines how these technologies work together to monitor equipment conditions, predict failures, and improve maintenance efficiency. It also discusses the impact of the IoT for maintenance on reducing downtime, lowering costs, and extending equipment lifespan while addressing the challenges associated with its implementation in Industry 4.0.