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Impact of intersection type and a vehicular fleet's hybridization level on energy consumption and emissions

Journal of Traffic and Transportation Engineering(English Edition) 2016年第3期3卷 253-261页

作者： samia boubaker Ferid Rehimi Adel Kalboussi Institut Superieur de Transport et de la Logistique Uniuersite de SousseSousseTunisia Laboratoire d'Electronique et de Microelectronique Faculte des Sciences de MonastirUniversite de MonastirMonastirTunisia Laboratoire detude des Systemes thermiques et Energetique Ecole Nationale d'Ingenieurs de MonastirUniversite de MonastirMonastirTunisia

A vehicle＇s energy consumption and emissions are two major constraints in sustainable development. Both of them have proportionally raised in recent decades with the exponential growth of world traffic demands. The reduction of road traffic-generated energy consumption and emissions have thus become unprecedentedly challenging and worth examining. This paper investigates energy consumption and environmental problems present at roundabout and signalized intersection to analyze the impact of the hybridization level＇s fleet and intersection type on vehicle consumption and pollution. Instantaneous fuel consumption and emission models coupled with simulation of urban mobility （SUMO） are in this study. The authors started with modeling energy consumption. Then, an emission model emissions from traffic （EMIT） was implemented to quantify vehicle emissions of CO2, CO and NOX. These models help investigate the influence of intersection type on energy consumption and environmental conditions. The authors implemented a signalized intersection and roundabout using SUMO. The input data are collected from the roundabout of Sousse （Tunisia） using video data collection. Since there is a lack of econometric models that emulate hybridized stream behavior near intersections, two energy consumption models for the roundabout and crossroad are developed using traffic flow and hybridization level as the input variables. Compared to crossroads, a roundabout can obtain more environmental improvements and substantial reductions in energy consumption and road traffic emissions.

关键词： Roundabout Signalized intersection Consumption Emission SUMO Hybridization

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Monte Carlo method for determining the response of portable gamma detector for in situ measurement of terrestrial gamma ray field

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Nuclear Science and Techniques 2016年第4期27卷 28-37页

作者： boubaker Askri Department of Physics College of Science Qassim University Research Unit of Nuclear Physics and High Energy Faculty of Sciences of Tunis University of Tunis El Manar

A Monte Carlo method to study the response of portable detector to terrestrial gamma ray is proposed. This method is based on two-stage Monte Carlo ***, the probability distributions of the phase space coordinates of the events that are most likely to be detected are reconstructed at the phase space shell level. The phase space shell is a closed surface enclosing the detector. The detector response to events originating from the phase space shell is then studied. The full absorption spectra as well as the partial absorption spectra are obtained for natural radionuclides uniformly distributed in the ground. For validation, this method is applied to a Hp Ge portable detector previously studied. The previous study is based on a semiempirical model. Good agreement is achieved when we compare the full-energy peak efficiencies and the total in situ spectra obtained by the two methods. As an application, the effective depth of the activity of the^(137) Cs artificial radionuclide in the soil is determined from the low-energy part of the total in situ spectrum.

关键词：伽玛探测器蒙特卡洛方法便携式地面相空间重构测量线场测定

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Improved Dijkstra Algorithm for Mobile Robot Path Planning and Obstacle Avoidance

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Computers, Materials & Continua 2022年第9期72卷 5939-5954页

作者： Shaher Alshammrei Sahbi boubaker Lioua Kolsi Department of Mechanical Engineering College of EngineeringUniversity of Ha’ilHa’il2440Saudi Arabia Department of Computer and Network Engineering College of Computer Science and EngineeringUniversity of JeddahJeddah21959Saudi Arabia Research Laboratory of Metrology and Energy Systems National Engineering SchoolEnergy Engineering DepartmentUniversity of MonastirMonastir5000Tunisia

Optimal path planning avoiding obstacles is among the most attractive applications of mobile robots(MRs)in both research and *** this paper,an optimal collision-free algorithm is designed and implemented practically based on an improved Dijkstra *** achieve this research objectives,first,the MR obstacle-free environment is modeled as a diagraph including nodes,edges and ***,Dijkstra algorithm is used offline to generate the shortest path driving the MR from a starting point to a target *** its movement,the robot should follow the previously obtained path and stop at each node to test if there is an obstacle between the current node and the immediately following *** this aim,the MR was equipped with an ultrasonic sensor used as obstacle *** an obstacle is found,the MR updates its diagraph by excluding the corresponding ***,Dijkstra algorithm runs on the modified *** procedure is repeated until reaching the target *** verify the efficiency of the proposed approach,a simulation was carried out on a hand-made MR and an environment including 9 nodes,19 edges and 2 *** obtained optimal path avoiding obstacles has been transferred into motion control and implemented practically using line tracking *** study has shown that the improved Dijkstra algorithm can efficiently solve optimal path planning in environments including obstacles and that STEAM-based MRs are efficient cost-effective tools to practically implement the designed algorithm.

关键词： Mobile robot(MR) STEAM path planning obstacle avoidance improved dijkstra algorithm

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The effect of the film thickness and doping content of SnO2:F thin films prepared by the ultrasonic spray method

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Journal of Semiconductors 2013年第9期34卷 21-25页

作者： Achour Rahal Said Benramache boubaker Benhaoua VTRS Laboratory Institute of TechnologyUniversity of El-oued 39000Algeria Physics Laboratory Institute of TechnologyUniversity of El-oued 39000Algeria Material Sciences Laboratory Faculty of ScienceUniversity of Biskra 07000Algeria

This paper reports on the effects of film thickness and doping content on the optical and electrical properties of fluorine-doped tin oxide. Tin （Ⅱ） chloride dehydrate, ammonium fluoride dehydrate, ethanol and HC1 were used as the starting materials, dopant source, solvent and stabilizer, respectively. The doped films were deposited on a glass substrate at different concentrations varying between 0 and 5 wt% using an ultrasonic spray technique. The SnO2：F thin films were deposited at a 350 ℃ pending time （5, 15, 60 and 90 s）. The average transmission was about 80%, and the films were thus transparent in the visible region. The optical energy gap of the doped films with 2.5 wt% F was found to increase from 3.47 to 3.89 eV with increasing film thickness, and increased after doping at 5 wt%. The decrease in the Urbach energy of the SnO2：F thin films indicated a decrease in the defects. The increase in the electrical conductivity of the films reached maximum values of 278.9 and 281.9 （Ω.cm）-1 for 2.5 and 5 wt% F, respectively, indicating that the films exhibited an n-type semiconducting nature. A systematic study on the influence of film thickness and doping content on the properties of SnO2：F thin films deposited by ultrasonic spray was reported.

关键词： SnO2 fluoride thin film film thickness TCO ultrasonic spray technique

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A Robust Approach for Multi Classification-Based Intrusion Detection through Stacking Deep Learning Models

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Computers, Materials & Continua 2024年第6期79卷 4845-4861页

作者： samia Allaoua Chelloug Department of Information Technology College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityRiyadh11671Saudi Arabia

Intrusion detection is a predominant task that monitors and protects the network ***,many datasets have been published and investigated by researchers to analyze and understand the problem of intrusion prediction and *** particular,the Network Security Laboratory-Knowledge Discovery in Databases(NSL-KDD)is an extensively used benchmark dataset for evaluating intrusion detection systems(IDSs)as it incorporates various network traffic *** is worth mentioning that a large number of studies have tackled the problem of intrusion detection using machine learning models,but the performance of these models often decreases when evaluated on new *** has led to the utilization of deep learning techniques,which have showcased significant potential for processing large datasets and therefore improving detection *** that reason,this paper focuses on the role of stacking deep learning models,including convolution neural network(CNN)and deep neural network(DNN)for improving the intrusion detection rate of the NSL-KDD *** base model is trained on the NSL-KDD dataset to extract significant *** the base models have been trained,the stacking process proceeds to the second stage,where a simple meta-model has been trained on the predictions generated from the proposed base *** combination of the predictions allows the meta-model to distinguish different classes of attacks and increase the detection *** experimental evaluations using the NSL-KDD dataset have shown the efficacy of stacking deep learning models for intrusion *** performance of the ensemble of base models,combined with the meta-model,exceeds the performance of individual *** stacking model has attained an accuracy of 99%and an average F1-score of 93%for the multi-classification ***,the training time of the proposed ensemble model is lower than the training time of benchmark techniques,demonstrating its efficien

关键词： Intrusion detection multi classification deep learning stacking NSL-KDD

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Method for converting in-situ gamma ray spectra of a portable Ge detector to an incident photon flux energy distribution based on Monte Carlo simulation

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Nuclear Science and Techniques 2008年第6期19卷 358-364页

作者： boubaker ASKRI Adel TRABELSI Brahim BACCARI Unité de Physique Nucléaire et des Hautes énergies Faculté des Sciences de Tunis2092 TunisTunisia Centre National de Sciences et de Technologies Nucléaires Sidi ThabetTunisia

A matrix stripping method for the conversion of in-situ gamma ray spectrum, obtained with portable Ge detector, to photon flux energy distribution is proposed. The detector response is fully described by its stripping matrix and full absorption efficiency curve. A charge collection efficiency function is introduced in the simulation to take into account the existence of a transition zone of increasing charge collection after the inactive Ge layer. Good agreement is obtained between simulated and experimental full absorption efficiencies. The characteristic stripping matrix is determined by Monte Carlo simulation for different incident photon energies using the Geant4 toolkit system. The photon flux energy distribution is deduced by stripping the measured spectrum of the partial absorption and cosmic ray events and then applying the full absorption efficiency curve. The stripping method is applied to a measured in-situ spectrum. The value of the absorbed dose rate in air deduced from the corresponding flux energy distribution agrees well with the value measured directly in-situ.

关键词：蒙特卡罗模拟锗探测器伽马射线拆模仿式

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Preparation of n-type semiconductor SnO_2 thin films

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Journal of Semiconductors 2013年第8期34卷 25-28页

We studied fluorine-doped tin oxide on a glass substrate at 350℃using an ultrasonic spray technique. Tin（Ⅱ） chloride dehydrate,ammonium fluoride dehydrate,ethanol and NaOH were used as the starting material, dopant source,solvent and stabilizer,*** SnO_2：F thin films were deposited at 350℃and a pending time of 60 and 90 *** as-grown films exhibit a hexagonal wurtzite structure and have（101） *** G = 31.82 nm value of the grain size is attained from SnO_2：F film grown at 90 s,and the transmittance is greater than 80%in the visible *** optical gap energy is found to measure 4.05 eV for the film prepared at 90 s, and the increase in the electrical conductivity of the film with the temperature of the sample is up to a maximum value of 265.58（Ω·cm）^（-1）,with the maximum activation energy value of the films being found to measure 22.85 meV,indicating that the films exhibit an n-type semiconducting nature.

关键词： SnO_2:F thin film TCO ultrasonic spray technique

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Wave Propagation in a Magneto-Micropolar Thermoelastic Medium with Two Temperatures for Three-Phase-Lag Model

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Computers, Materials & Continua 2016年第4期52卷 1-24页

作者： samia M.Said Department of Mathematics Faculty of ScienceZagazig UniversityP.O.Box 44519ZagazigEgypt

The present paper is concerned with the wave propagation in a micropolar thermoelastic solid with distinct two temperatures under the effect of the magnetic field in the presence of the gravity field and an internal heat *** formulation of the problem is applied in the context of the three-phase-lag model and Green-Naghdi theory without *** medium is a homogeneous isotropic thermoelastic in the *** exact expressions of the considered variables are obtained by using normal mode *** are made with the results in the two theories in the absence and presence of the magnetic field as well as the two-temperature parameter.A comparison is also made in the two theories for different values of an internal heat source.

关键词： Green-Naghdi theory internal heat source magnetic field micropolar three-phase-lag model two-temperature

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Effect of substrate temperature on the stability of transparent conducting cobalt doped ZnO thin films

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Journal of Semiconductors 2012年第9期33卷 18-21页

作者： Said Benramache boubaker Benhaoua Foued Chabane Material Sciences Laboratory Faculty of ScienceUniversity of Biskra 07000Algeria Physics Laboratory Institute of TechnologyUniversity of El-oued 39000Algeria Mechanics Department Faculty of TechnologyUniversity of Biskra 07000Algeria

Transparent conducting Co doped ZnO thin films have been fabricated by Ultrasonic spray. The thin films were deposited at three different substrate temperatures of 300, 350 and 400 ℃. The obtained films had a hexagonal wurtzite structure with a strong （002） preferred orientation. The maximum crystallite size value of the film deposited at 350 ℃ is 55.46 nm. Spectrophotometer （UV-vis） of a Co doped ZnO film deposited at 350 ℃ shows an average transmittance of about 90%. The band gap energy increased from 3.351 to 3.362 eV when the substrate temperature increased from 300 to 350 ℃. The electrical conductivity of the films deposited at 300, 350 and 400 ℃ were 7.424, 7.547 and 6.743 （Ω·cm）^-1 respectively. The maximum activation energy value of the films at 350 ℃ was 1.28 eV, indicating that the films exhibit a n-type semiconducting nature.

关键词： ZnO:Co films transparent conducting films ultrasonic spray deposition substrate temperature band gap energy

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2-Hydroxy-1,4-napthoquinone solubilization,thermodynamics and adsorption kinetics with surfactant

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Chinese Journal of Chemical Engineering 2021年第4期34卷 212-223页

作者： Zoya Zaheer Ekram Yousif Danish samia A.Kosa Department of Chemistry Faculty of ScienceP.O.Box 80203King Abdulaziz UniversityJeddah 21589Saudi Arabia

2Hydroxy1,4napthoquinone(lawsone)natural redorange dye was extracted from fresh henna(Lawsonia inermis)leaves in an alkaline *** lawsonesurfactant solubilization constants(KLS)were calculated for the first time by using cationic cetyltrimethylammonium bromide(CTAB)and anionic sodium dodecyl sulphate(SDS).The standard free energy,concentration of solubilized lawsone and number of lawsone molecules solubilized into micelles were calculated and *** excess,minimum surface area per molecule,surface pressure,free energy(adsorption and aggregation)and equilibrium constants of different states were determined from *** metal ions(Ag^(+),Co^(2+),Cu^(2+),Ni^(2+),Fe^(3+),Zn^(2+)and Al^(3+)were used to determine the complex forming ability with *** of these,Ag+ions have strong binding capacity with *** adsorption of lawsone on the surface of glass with silver ions in presence of CTAB was also observed at pH>*** pseudofirst,secondorder kinetic equation,intraparticles diffusion and Elovich models were used to determine the kinetics of lawsone adsorption onto the surface of glass and a probable mechanism has been *** adsorption followed secondorder kinetic equation(k_(2)=0.019 g·mg^(1)·min^(1)).

关键词： Adsorption Aggregation Lawsone Surfactant Solubilization Kinetics

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