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Aptian–Albian Transition in Central Tunisia:Tectonosedimentary and Paleogeographic Records

Journal of Earth Science 2014年第5期25卷 787-798页

作者： imen Marco Ferid Dhahri Taoufik Haji Noureddine Boukadi University of Tunis El Manar Faculty of Sciences of Tunis Tunis 2092 UR11ES15 Sedimentary Environments Petroleum systems and reservoirs characterization University of Gafsa Faculty of Sciences de Gafsa Gafsa 2112 Tunis

The Aptian-Albian series are characterized, in Tunisia, by several variations in subsidence rates and records discrete unconformity between Albian and Aptian in central and southern Tunisia. In central Tunisia Upper Aptian regressions were sustained until the beginning of Albian with a low sea level stand. In this paper, wells data gathered from central Tunisia exposes well expressed Aptian-Albian hiatus associated to several partial sedimentary gaps, erosion surface and unconformities and correlated with the ＂Aptian Crisis＂ highlighted at the Tethyan scale. This latter is coeval with an extensional regime in concurrence with the African rifting responsible for halokinesis movements and magmatism and leaded to the establishment of paleoreliefs as much as tilted blocks and half grabens in central Tunisia. Deposition shows regional hiatus and lateral transition from platform facies to south to, open marine facies to the north. The structural configuration of this domain within normal faulting, horsts and grabens leaded to the establishment of several distinct basins with different subsidence rates. Discordances occur specially around and upward uplifted blocks and emerged land and are especially associated with Aptian reef, karsts and shallow marine facies. They are unconformably overlaid by the transgressive open marine facies of Albian-Cenomanian series acknowledged as source rock in Central Tunisia. In addition, the reefal Aptian facies is considered a potential reservoir rocks in central Tunisia and it is frequently associated to mineralization and Hydrocarbure reservoirs.

关键词： central Tunisia Aptian Albian Hiatus well data.

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An Efficient AES 32-Bit Architecture Resistant to Fault Attacks

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Computers, Materials & Continua 2022年第2期70卷 3667-3683页

作者： Hassen Mestiri imen Barraj Abdullah Alsir Mohamed Mohsen Machhout Department of Computer Engineering College of Computer Engineering and SciencesPrince Sattam bin Abdulaziz UniversityAl-Kharj11942Saudi Arabia Higher Institute of Applied Sciences and Technology of Sousse University of SousseTunisia Electronics and Micro-Electronics Laboratory Faculty of Sciences of MonastirUniversity of MonastirTunisia METS Research Group Electrical Engineering DepartmentNational Engineers School of SfaxUniversity of SfaxTunisia Higher Institute of Computer Science and Multimedia of Gabes University of GabesTunisia

The Advanced Encryption Standard cryptographic algorithm,named AES,is implemented in cryptographic circuits to ensure high security level to any system which required confidentiality and secure information *** of the most effective physical attacks against the hardware implementation of AES is fault attacks which can extract secret *** now,a several AES fault detection schemes against fault injection attacks have been *** this paper,so as to ensure a high level of security against fault injection attacks,a new efficient fault detection scheme based on the AES architecture modification has been *** this reason,the AES 32-bit round is divided into two half rounds and input and pipeline registers are implemented between *** proposed scheme is independent of the procedure the AES is ***,it can be implemented to secure the pipeline and iterative *** evaluate the robustness of the proposed fault detection scheme against fault injection attacks,we conduct a transient and permanent fault attacks and then we determine the fault detection capability;it is about 99.88585%and 99.9069%for transient and permanent faults *** have modeled the AES fault detection scheme using VHDL hardware language and through hardware FPGA *** FPGA results demonstrate that our scheme can efficiently protect the AES hardware implementation against fault *** can be simply implemented with low *** addition,the FPGA implementation performances prove the low area overhead and the high efficiency and working frequency for the proposed AES detection scheme.

关键词： Security cryptographic circuits AES hardware implementation fault detection fault attacks

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Active fault tolerant control design for stochastic Interval Type-2 Takagi-Sugeno fuzzy model

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International Journal of Intelligent Computing and Cybernetics 2018年第3期11卷 404-422页

作者： imen Maalej Donia Ben Halima Abid Chokri Rekik Control and Energy Management Laboratory National Engineering School of SfaxUniversity of SfaxSfaxTunisia

Purpose-The purpose of this paper is to look at the problem of fault tolerant control(FTC)for discrete time nonlinear system described by Interval Type-2 Takagi–Sugeno(IT2 TS)fuzzy model subjected to stochastic noise and actuator ***/methodology/approach–An IT2 fuzzy augmented state observer is first developed to estimate simultaneously the system states and the actuator faults since this estimation is required for the design of the FTC control ***,based on the information of the states and the faults estimate,an IT2 fuzzy state feedback controller is conceived to compensate for the faults effect and to ensure a good tracking performance between the healthy system and the faulty *** conditions for the existence of the IT2 fuzzy controller and the IT2 fuzzy observer are given in terms of linear matrix inequalities which can be solved using a two-step computing ***–The paper opted for simulation results which are applied to the three-tank *** results are presented to illustrate the effectiveness of the proposed FTC ***/value–In this paper,the problem of active FTC design for noisy and faulty nonlinear system represented by IT2 TS fuzzy model is *** developed IT2 fuzzy fault tolerant controller is designed such that it can guarantee the stability of the closed-loop ***,the proposed controller allows to accommodate for faults,presents a satisfactory state tracking performance and outperforms the traditional type-1 fuzzy fault tolerant controller.

关键词： Fuzzy logic Fault tolerant control Intelligent control Interval Type-2 Takagi-Sugeno(IT2 TS)fuzzy model Linear matrix inequalities

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Surface Nanostructure Control with Poly(ethylene glycol)(PEG)Spacer by Templateless Electropolymerization

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Journal of Bionic Engineering 2021年第1期18卷 65-76页

作者： imen Bousrih Mejda El Kateb Mohammed Beji Fréderic Guittard Thierry Darmanin University of Tunis El Manar Laboratory of Structural Organic ChemistryFaculty of Sciences of TunisTunis 2092Tunisia Universite Cote d'Azur NICE LabParc Valrose Nice 06100France

Controlling the shape of surface nanostructures is fundamental for various potential applications for cxamples,in water harvesting systems,liquid transportation or oil/water separation *** this paper,the creation of porous surface structures is made by a process called templateless electropolymerization,in which water(H_(2)0)is oxidizedreduced to form gas(O_(2)/H_(2))bubbles onto the surfaces and acting as soft template for the polymer *** the monomer(thieno[3,4-b]lhiophene)and the substituent(pyrene)constant,we demonstrate how a flexible PEG spacer can affect the structure *** the PEG spacer increases,the structures change frorm nanotubes(1D growth)to nanoribbons(2D)and after to hollow nanospheres(3D),which also affeets the wettig propertics.

关键词： nanostructures wettability hydrophobicity electrochemistry bioinspiration

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Formation of Nanotubular Structures with Petal Effect by Soft-Template Electropolymerization of Benzotrithiophene with Hydrophilic Carboxyl Group

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Journal of Bionic Engineering 2022年第4期19卷 1054-1063页

作者： Maroua Khodja imen Bousrih Mejda El Kateb Mohammed Beji Frederic Guittard Thierry Darmanin Laboratory of Structural Organic Chemistry Faculty of Sciences of Tunis University of Tunis El Manar2092 TunisTunisia NICE Lab Universite Cote d’Azur06100 NiceFrance

The bioinspiration is one of the best ways to make a breakthrough in a field,and particularly in the wetting *** by natural species,such as rose petals and gecko foot,and previous researches,nanotubular structures are prepared here by soft-template electropolymerization in organic solvent and using an original benzotrithiophene with a hydrophilic carboxyl group,as the *** best results are obtained by cyclic voltammetry because of a much higher amount of gas bubbles released with this deposition *** nanoparticles and nanotubes are observed while the water content has an influence on the number of *** if the monomer has hydrophilic carboxyl group,the best films have both high hydrophobicity(apparent water contact angle up to 130.7°)and strong water adhesion(petal effect).These surfaces could be used in future in applications such as water harvesting systems.

关键词： Bioinspired Electropolymerization Hydrophobicity Nanostructures Nanotubes Wettability

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On a Hybrid Preamble/Soft-Output Demapper Approach for Time Synchronization for IEEE 802.15.6 Narrowband WBAN

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China Communications 2015年第2期12卷 1-10页

作者： imen Nasr Leila Najjar Atallah Sofiane Cherif YANG Jianxiao WANG Kunlun Unité d'Informatique et d'Ingènierie des Systemes(U2IS) Ecole Nationale Supérieure de Techniques Avancées(ENSTA Paris Tech) Communication Signal and Image(COSIM) LaboratoryHigher School of Communications of Tunis(Sup'Com) Network Coding and Transmission Laboratory Shanghai Jiao Tong University

In this paper,we present a maximum likelihood(ML) based time synchronization algorithm for Wireless Body Area Networks(WBAN).The proposed technique takes advantage of soft information retrieved from the soft demapper for the time delay *** algorithm has a low complexity and is adapted to the frame structure specified by the IEEE 802.15.6standard[1]for the narrowband *** results have shown good performance which approach the theoretical mean square error limit bound represented by the Cramer Rao Bound(CRB).

关键词： WBAN IEEE 802.15.6 time synchronization ML estimation soft demapping

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Sensor Faults Observer Design with H_∞ Performance for Non-linear T-S systems

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International Journal of Automation and computing 2013年第6期10卷 563-570页

作者： imen Haj Brahim Maha Bouattour Driss Mehdi Mohamed Chaabane Ghani Hashim Laboratory of Sciences and Techniques of Automatic Control&Computer Engineering(Lab-STA) National School of Engineering of SfaxUniversity of Sfax LIAS-ENSIP University of PoitiersLIAS-ENSIP2 rue Pierre Brousse Computer Science Department Cihan University

This paper deals with the problem of the state estimation and the sensor faults detection for nonlinear perturbed systems described by Takagi-Sugeno （T-S） fuzzy models with unmeasurable premise variables. Indeed, a T-S observer is synthesized, in descriptor form, to estimate both the system states and the sensor faults simultaneously. The idea of the proposed approach is to introduce the sensor fault as an auxiliary variable in the state vector. Besides, the T-S model with unmeasurable premise variables is reduced to a perturbed model with measurable variables. Convergence conditions are established with Lyapunov theory and the H∞ performance in order to guarantee the best robustness to disturbances. These conditions are expressed in terms of linear matrix inequalities （LMIs）. The parameters of the observer are computed using the solution of the LMI conditions. Finally, a numerical example is given to illustrate the design procedures. Simulation results show the satisfactory performances.

关键词： Takagi-Sugeno (T-S) fuzzy system sensor faults H∞ performance descriptor approach observer linear matrix inequality(LMI).

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Phenolic and flavonoid contents, antioxidant and antimicrobial activities of leaf extracts from ten Algerian Ficus carica L. varieties

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Asian Pacific Journal of Tropical Biomedicine 2016年第3期6卷 239-245页

作者： Souhila Mahmoudi Mustapha Khali Abderahim Benkhaled Karima Benamirouche imen Baiti Department of Food Sciences University "Saad Dahleb" of Blida Department of Microbiology and Biochemistry University of M'sila Scientific and Technical Research Center in Physicochemical Analyses

Objective: To determine the total phenolic and flavonoid contents, antioxidant and antimicrobial activities of methanolic leaf extracts of ten Algerian fig(Ficus carica L.)varieties(uniferous, biferous and caprifig tree).Methods: Phenolics were extracted by Soxhlet method and analyzed by the Folin–Ciocalteu colorimetric method. Flavonoids were determined by aluminum trichloride assay and the antioxidant capacity was determined by the 2,2-diphenyl-1-picrylhydrazyl radical scavenging assay. The antimicrobial activity was studied with the disc diffusion method and a macrodilution broth method was used to determine the minimal inhibitory concentrations and minimal lethal ***: The mean extract yield was 14.10% ± 0.66%(n = 10). Leaf extract of biferous followed by uniferous varieties had the highest total phenolic contents [(52.296 ± 5.232)and(48.973 ± 2.015) mg gallic acid equivalent/g of dry plant extract respectively], flavonoids [(14.388 ± 0.333) and(14.136 ± 1.082) mg quercetin equivalent/g of dry plant extract] and antioxidant capacity [IC50(798.754 ± 108.590) and(825.004 ± 110.835) mg/m L]. Antioxidant capacity of fig leaves was significantly correlated with phenolic contents(r = 0.748). These extracts showed bactericidal activity and moderate antifungal activity, and the minimal inhibitory concentrations and minimal lethal concentrations were determined on Bacillus cereus and Staphylococcus ***: All tested extracts contain phenolic compounds and exhibited an antioxidant activity and an antimicrobial effect against Gram-positive and Gram-negative bacteria. Further researches on identification and purification of phenolic compounds are required.

关键词： Fig leaves Phenolics Flavonoids Antioxidant activity Antimicrobial activity

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An Accurate Dynamic Forecast of Photovoltaic Energy Generation

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Fluid Dynamics & Materials Processing 2022年第6期18卷 1683-1698页

作者： Anoir Souissi imen Guidara Maher Chaabene Giuseppe Marco Tina Moez Bouchouicha Signal Image et Maîtrise de l’Energie(SIME Laboratory)Tunis1008Tunisia Dipartimento di Ingegneria Elettrica Elettronica e InformaticaCatania95125Italy Laboratoire LIS-Equipe SIIM Département GMP IUT Toulon83041France

The accurate forecast of the photovoltaic generation(PVG)process is essential to develop optimum installation sizing and pragmatic energy planning and *** paper proposes a PVG forecast model for a PVG/Battery *** forecasting strategy is built on a Medium-Term Energy Forecasting(MTEF)approach refined dynamically every hour(Dynamic Medium-Term Energy Forecasting(DMTEF))and adjusted by means of a Short-Term Energy Forecasting(STEF)*** MTEF predicts the generated energy for a day ahead based on the PVG of the last 15 *** for STEF,it is a combination between PVG Short-Term(ST)forecasting and DMTEF methods obtained by selecting the least inaccurate PVG estimation every 15 *** algorithm results are validated by measures taken on a 3 KWp standalone PVG/Battery *** proposed approaches have been integrated into a management algorithm in order to make a pragmatic decision to ensure load supply considering relevant constraints and priorities and guarantee the battery *** results show that STEF provides accurate results compared to measures in stable and perturbed *** NMBE(Normalized Mean Bias Error)is equal to-0.58%in stable days and 26.10%in perturbed days.

关键词： Energy Forecasting MTEF DMTEF STEF ARIMA model photovoltaic energy

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Some Generalized q-Bessel Type Wavelets and Associated Transforms

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Analysis in Theory and Applications 2018年第1期34卷 57-76页

作者： imen Rezgui Anouar Ben Mabrouk Algerba Number Theory and Nonlinear Analysis Research UnitUR11ES50Department of MathematicsFaculty of Sciences Department of Mathematics Higher Institute of Applied Mathematics and InformaticsStreet of Assad Ibn AlfouratKairouan University Department of Mathematics Faculty of SciencesUniversity of Tabuk

In this paper wavelet functions are introduced in the context of q-theory. We precisely extend the case of Bessel and q-Bessel wavelets to the generalized q-Bessel wavelets. Starting from the （q,v）-extension （v = （α,β）） of the q-case, associated generalized q-wavelets and generalized q-wavelet transforms are developed for the new context. Reconstruction and Placherel type formulas are proved.

关键词： Wavelets Besel function q-Bessel function modified Bessel functions generalizedq-Bessel functions q-Bessel wavelets.

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