检索结果-南通市图书馆

Advances in Materials Physics and Chemistry 2021年第12期11卷 254-266页

作者： Brahim Bachachir Yassine Er-Rouissi Radouane Makhlouk achraf harrati Abdeslam El Bouari Said Aqdim Faculty of Sciences Ain Chock Laboratory of Materials Engineering for Environment and Valorization Hassan II University Casa-blanca Morocco Faculty of Sciences Ben-M’sik Laboratory Physical-Chemistry of Applied Materials Hassan II University Casablanca Morocco Department of Chemistry Faculty of Science Mineral Chemistry Laboratory Hassan II University Ain Chock Casablanca Morocco

The glass series 50P2O5-25CaO-(25-x)Na2O-xCoO (with (0 ≤ x ≤ 25;mol%), has been prepared by direct melting at 1080°C ± 20°C. The introduction of cobalt in calcium phosphate glasses is used to compare its effect with calcium in inhibition corrosion. The dissolution rate has been investigated. It indicated an improvement of chemical durability when the cobalt oxide increases in the network glass at the expense of Na2O content. Both, IR spectroscopy and X-ray diffraction have confirmed the structure changes when the CoO content increases in the glass. This change results in the disappeara

关键词： Chemical Durability Phosphate Glasses Cobalt Oxide Density DTA DRX IR SEM Micrograph

Effects of Lizardite Addition on Technological Properties of Forsterite- monticellite Rich Ceramics Prepared from Natural Magnesite and Dolomite

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Construction Research 2020年第1期2卷 9-20页

作者： Ahmed Manni achraf harrati Abdelilah El Haddar Abdelwahed Chari Ali Sdiri Fahd Oudrhiri Hassani Abdeslam El Bouari Iz-Eddine El Amrani El Hassani Chaouki Sadik Laboratory of Physical Chemistry of Applied Materials(LPCMA) Department of ChemistryFaculty of Sciences Ben MsikHassan II University of CasablancaMorocco Laboratory of Applied Geosciences Faculty of SciencesUniversity of Mohammed 1OujdaMorocco Materials Sciences Energy and Nano-engineering DepartmentMohammed VI Polytechnic UniversityBen GuerirMorocco Department of Georessources and Environment National Engineering SchoolUniversity of SfaxP.Box 3052SfaxTunisia LMPEQ University of Cadi AyyadENSA of SAFIMorocco Geomaterials and Geo environment Team/Geo-Biodiversity and Natural Patrimony Laboratory (GEOBIO)/GeophysicsNatural Patrimony and Green Chemistry Research Centre(GEOPAC)Scientific InstitutMohammed V University of RabatMorocco

Lizardite rich peridotite has never been used to prepare ceramic specimens,especially in *** this raison,potential use of naturally abundant lizarditic material from the Rif domain,as a supply for ceramic industry,has been *** effects of lizardite addition to magnesite and dolomite mixtures on the thermomechanical properties of the calcined ceramics were also *** achieve this target,natural lizardite,magnesite and dolomite samples were collected in ultrabasic Beni Bousra *** raw samples were used for the synthesis of a forsterite-monticellite rich *** raw and sintered samples were characterized by x-ray diffraction,scanning electron microscope and fourier transform *** obtained results showed that both magnesite and dolomite were mainly composed of MgCO_(3) and CaCO_(3).In contrast,lizardite sample showed high amounts of SiO_(2),MgO and Fe2O_(3).An increased amount of lizardite in the initial mixtures enhanced mechanical and dimensional properties of the prepared ceramic specimens,and subsequently,the production of ceramics with the required technological ***,the preparation of Moroccan lizardite-based ceramics is technically feasible,economically justifiable and socially desirable due to the contribution to the economic growth of the raw materials sector,especially ceramic industry.

关键词： Forsterite Monticellite Lizardite Basic ceramics Temperature

故障具有明显运行性影响的民用飞机维修任务优化方法

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

航空工程进展 2024年

作者：赖涛蔡景 ASSILA achraf 南京航空航天大学民航学院

在民用飞机维修规划中，基于MSG-3标准制定的民用飞机初始维修任务，由于缺乏使用数据支持，初步维修间隔设定偏于保守，在实践中存在过度维修、经济性差等问题。在IP44指导思想下，借鉴波音计划维修优化的统计分析（SASMO）的优化流程... 详细信息

在民用飞机维修规划中，基于MSG-3标准制定的民用飞机初始维修任务，由于缺乏使用数据支持，初步维修间隔设定偏于保守，在实践中存在过度维修、经济性差等问题。在IP44指导思想下，借鉴波音计划维修优化的统计分析（SASMO）的优化流程，提出基于故障具有明显运行性影响的民用飞机维修任务优化方法。首先，由故障影响类别梳理明显运行性影响类故障的特点；其次，收集所有与该类别维修任务相关的计划维修数据和非计划维修数据；然后，建立维修事件链将多源维修数据融合为故障周期并进行统计分析，拟合该维修项目的故障概率曲线；最后，根据工程分析及综合评估给出维修任务间隔的优化建议。结果表明：本文提出的民用飞机维修任务优化方法能够减少停飞时间，提高维护效率，降低维护成本。

关键词：明显运行性维修任务优化维修事件链多源数据融合故障概率曲线工程分析

Does wet-cupping therapy improve repeated sprint ability,perceived wellness,and rating of perceived exertion in young active males?

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Sports Medicine and Health Science 2024年第4期6卷 378-384页

作者： Ismail Dergaa Amine Ghram Mohamed Romdhani Amine Souissi achraf Ammar Ramadan Abdelmoez Farahat Mohamed Saifeddin Fessi Khadijeh Irandoust Morteza Taheri Tasnim Masmoudi Mohamed Amine Dergaa Nizar Souissi Omar Hammouda Katja Weiss Karim Chamari Helmi Ben Saad Beat Knechtle Primary Health Care Corporation(PHCC) DohaP.O.Box 26555Qatar Research Unit Physical Activity Sportand HealthUR18JS01National Observatory of SportTunis 1003Tunisia High Institute of Sport and Physical Education University of SfaxSfaxTunisia Department of Cardiac Rehabilitation Heart HospitalHamad Medical CorporationDohaQatar Universite de Sousse Faculte de Medecine de SousseHopital Farhat HACHEDLaboratoire de Recherche(Insuffisance CardiaqueLR12SP09)SousseTunisia Healthy Living for Pandemic Event Protection(HL-PIVOT)Network ChicagoILUSA Interdisciplinary Laboratory in Neurosciences Physiology and Psychology:Physical ActivityHealth and LearningUFR STAPSUPLParis Nanterre UniversityNanterreFrance Department of Training and Movement Science Institute of Sport ScienceJohannes Gutenberg-University Mainz55128 MainzGermany Research Laboratory Molecular Bases of Human PathologyLR19ES13Faculty of Medicine of SfaxUniversity of SfaxSfax 3029Tunisia Faculty of Medicine Kafrelsheikh UniversityKafrelsheikh33511Egypt Department of Behavioral and Cognitive Sciences in Sport Faculty of Sport Sciences and HealthUniversity of TehranIran University of Sousse Farhat HACHED HospitalForensic ServiceSousseTunisia Medbase St.Gallen Am Vadianplatz St.GallenSwitzerland Aspetar Orthopaedic and Sports Medicine HospitalFIFA Medical Centre of ExcellenceDohaP.O.Box 29222Qatar Institute of Primary Care University of ZurichZurichSwitzerland

Wet-cupping therapy(WCT)is one of the oldest known medical techniques,used as a traditional and complementary therapy with a wide application all around the world for general *** on the effects of WCT on sports performance are sparse and ***,we aimed to explore the effects of WCT on repeated sprint ability,wellness,and exertion in young active ***-nine active adult males(age:[28±5]years;body height[177±8]cm;body mass:[79±7]kg;body mass index:[25.4±1.8]kg/m^(2))were selected for the *** participants performed a running-based sprint test on two separate occasions(Control and Post-WCT).WCT was performed 24 h before the testing *** completed the Hooper questionnaire to assess their well-being(i.e.,sleep,stress,fatigue,and soreness)before each *** rating of perceived exertion(RPE)was collected after each testing session.A higher maximum power(p<0.05,effect size[ES]=0.6),mean power(p<0.01,ES=0.5)and minimum power(p<0.01,ES=0.6)were recorded post-WCT as compared to Control session along with a better perceived sleep(p<0.01,ES=0.85).Perceived stress(p<0.01,ES=0.6)and RPE(p<0.001;ES=1.1)were lower during the post-WCT compared to the Control *** present findings demonstrated that WCT moderately enhanced repeated sprint ability and had positive effects on perceived sleep,stress,and *** may be an effective ergogenic aid to improve repeated sprint ability and general wellbeing in young adult *** large-scale multicentric clinical studies are paramount to confirm the results of our study.

关键词： Alternative medicine Complementary medicine Hijama Short-term maximal performance Sports medicine

Sports Prediction Model through Cloud Computing and Big Data Based on Artificial Intelligence Method

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Intelligent Learning Systems and Applications 2024年第2期16卷 53-79页

作者： Aws I. Abu Eid achraf Ben Miled Ahlem Fatnassi Majid A. Nawaz Ashraf F. A. Mahmoud Faroug A. Abdalla Chams Jabnoun Aida Dhibi Firas M. Allan Mohammed Ahmed Elhossiny Salem Belhaj Imen Ben Mohamed Faculty of Computing Studies Arab Open University Amman Jordan Computer Science Department Science College Northern Border University Arar Kingdom of Saudi Arabia Artificial Intelligence and Data Engineering Laboratory LR21ES23 Faculty of Sciences of Bizerte University of Carthage Tunis Tunisia Applied College Northern Border University Arar Kingdom of Saudi Arabia Faculty of Specific Education Mansoura University Mansoura Egypt

This article delves into the intricate relationship between big data, cloud computing, and artificial intelligence, shedding light on their fundamental attributes and interdependence. It explores the seamless amalgamation of AI methodologies within cloud computing and big data analytics, encompassing the development of a cloud computing framework built on the robust foundation of the Hadoop platform, enriched by AI learning algorithms. Additionally, it examines the creation of a predictive model empowered by tailored artificial intelligence techniques. Rigorous simulations are conducted to extract valuable insights, facilitating method evaluation and performance assessment, all within the dynamic Hadoop environment, thereby reaffirming the precision of the proposed approach. The results and analysis section reveals compelling findings derived from comprehensive simulations within the Hadoop environment. These outcomes demonstrate the efficacy of the Sport AI Model (SAIM) framework in enhancing the accuracy of sports-related outcome predictions. Through meticulous mathematical analyses and performance assessments, integrating AI with big data emerges as a powerful tool for optimizing decision-making in sports. The discussion section extends the implications of these results, highlighting the potential for SAIM to revolutionize sports forecasting, strategic planning, and performance optimization for players and coaches. The combination of big data, cloud computing, and AI offers a promising avenue for future advancements in sports analytics. This research underscores the synergy between these technologies and paves the way for innovative approaches to sports-related decision-making and performance enhancement.

关键词： Artificial Intelligence Machine Learning Spark Apache Big Data SAIM

Cu-Promoted Cobalt Oxide Film Catalyst for Efficient Gas Emissions Abatement

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Thermal Science 2019年第2期28卷 225-231页

作者： EL KASMI achraf WAQAS Muhammad MOUNTAPMBEME KOUTOU Patrick TIAN Zhenyu Institute of Engineering Thermophysics Chinese Academy of Sciences University of Chinese Academy of Sciences National Advanced School Engineering of Maroua University of Maroua

Thin film catalysts have been recently reported as promising catalysts owing to their good catalytic activity and reduced material amount, leading to low-cost efficient catalysts for gaseous emissions control. Here, we report the slight loading of Cu in cobalt spinel using a one-step pulsed-spray evaporation chemical vapor deposition(PSE-CVD) synthesis technique for efficient short-chain volatile organic compounds(VOCs) emissions treatment. Crystalline structure and morphology analyses revealed nano-crystallite sizes and open-like morphology. The catalytic performance was evaluated through the complete oxidation of C_3H_6, as a short-chain representative model of VOCs, at a high gas hourly space velocity(GHSV). Very good activity was obtained towards the complete abatement of C_3H_6 at low temperature and no carbon monoxide(CO) was formed during the oxidation process. Slightly-promoted Co_3O_4 catalyst with Cu introduction resulted in high catalytic activity comparing to the performance of the catalysts in the literature, due to the high dispersion of Cu and high active surface oxygen amount. Moreover, to evaluate the capability of the used catalysts under near realistic reaction conditions, CO_2 effect on the catalytic activity was performed and the catalyst exhibited very good results. Thus, the adopted slightly-doping strategy to tailor a high active catalyst at low temperature could establish a very promising route to strongly enhance the activity of such other catalysts towards gas emissions abatement at low temperature.

关键词： low Cu-doping PSE-CVD technique thin film catalysts complete catalytic oxidation VOCs

维普期刊数据库

Prediction of Residential Building’s Solar Installation Energy Demand in Morocco Using Multiple Linear Regression Analysis

在线全文

学校读者我要写书评

暂无评论

Energy Engineering 2022年第5期119卷 2135-2148页

作者： Nada Yamoul Latifa Dlimi Baraka achraf Chakir Department of Physics Faculty of SciencesIbn Tofail UniversityKenitra City14000Morocco Department of Mathematics Faculty of SciencesIbn Tofail UniversityKenitra City14000Morocco

The building sector is one of the main energy-consuming sectors in *** fact,it accounts for 33%of the final consumption of energy and records a high increase in the annual consumption of energy caused by further planned large-scale ***,the energy consumption of the building sector is experiencing a significant acceleration justified by the rapid need for the development of housing stock,wich is estimated at an average increase of 1,5%per year;furthermore,tant is an estimated increase of about 6,4%.In this sense,building constitutes an important potential source for rationalizing both energy consumption and energy savings through the adoption of energy efficiency *** consumption control efforts in the residential building sector involve socio-economic,technological,and environmental concerns that require sophisticated ***,different types of quantitative models have been developed and examined so as to find a solution for the optimizing energy *** this work,we have highlighted the importance of using solar heaters to reduce energy demand in terms of the use of domestic hot *** do this,we have defined the needs and characteristics of a solar installation of a residential building located in Casablanca through a calculating tool“SOLO 2000”in addition to the use of multiple linear regression analysis to deduct the impact of irradiation and solar contributions on the energy demand of the solar installation.

关键词： Residential sector energy simulation prediction models black box solar energy

Fe-Promoted Copper Oxide Thin-Film Catalysts for the Catalytic Reduction of N_(2)O in the Presence of Methane

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Thermal Science 2023年第2期32卷 531-541页

作者： MUHAMMAD Waqas WU Lingnan EI KASMI achraf MUHAMMAD Ammar TIAN Zhenyu Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Department of Mechanical Engineering College of Engineering and TechnologyUniversity of SargodhaSargodha 40100Pakistan Laboratory LSIA UAE/U02ENSAHNational School of Applied Sciences of Al HoceimaAbdelmalek Essaadi UniversityAl Hoceima 32003Morocco Department of Chemical Engineering Technology Government College UniversityFaisalabad 38000Pakistan

Thin-film catalysts are recently recognized as promising catalysts due to their reduced amount of materials and good catalytic activity,leading to low-cost and high-efficiency catalysts.A series of CuFeO_(x)thin-film catalysts were prepared with different Fe contents using a one-step method as well as tested for the catalytic reduction of nitrous oxide(N_(2)O)in the presence of CH_(4)at a high GH SV of 185000 mL/(g·h).The increase of iron strongly affects the dispersion and leads to the creation of a less-active segregated Fe_(2)O_(3)phase,which was confirmed by XRD,EDX,and XPS *** results show that the synergistic properties between Cu and Fe,which affect the CuFeOxfilm catalysts in many aspects,such as the hollow-like texture,specific surface area,nano-crystallite size,the surface contents of Cu^(+),Fe^(3+),and oxygen species,the reductive strength and the strong active sites on the *** DFT calculations,the adsorption and decomposition energy profiles of N_(2)O on the CuFeO_(2)(012)surface model were *** surface Fe-site and hollow-site are active for N_(2)O decomposition,and the decomposition energy barriers on the Fe-site and the hollow-site are 1.02 eV and 1.25 eV respectively at 0 *** strategy adopted here to tailor the activity through low-doping Fe-oxide catalysts could establish a promising way to improve the catalytic reduction of N_(2)O with CH_(4).

关键词： catalytic reduction thin-film catalysts doping strategy density functional theory calculations N_(2)O decomposition

维普期刊数据库

An efficient and innovative catalytic reactor for VOCs emission control

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2019年第9期64卷 625-633页

作者： achraf El Kasmi Guan-Fu Pan Ling-Nan Wu Zhen-Yu Tian Institute of Engineering Thermophysics Chinese Academy of Sciences University of Chinese Academy of Sciences Energy Conservation Corporation Ltd.of China Coal Research Institute Beijing 100013China

Efficient mixing and thermal control are important in the flow reactor for obtaining a high product yield and ***,we report a heterogeneous chemical kinetic study of propene oxidation within a newly designed catalytic jet-stirred reactor(CJSR).To better understand the interplay between the catalytic performances and properties,the CuO thin films have been characterized and the adsorbed energies of propene on the adsorbed and lattice oxygen were calculated using density functional theory(DFT)*** and morphology analyses revealed a monoclinic structure with nano-crystallite size and porous microstructure,which is responsible for holding an important quantity of adsorbed *** residence time inside the flow CJSR(1.12–7.84 s)makes it suitable for kinetic study and gives guidance for *** kinetic study revealed that using CJSR the reaction rate increases with O_2concentration that is commonly not achievable for catalytic flow tube reactor,whereas the reaction rate tends to increase slightly above 30%of O_2due to the catalyst surface ***,DFT calculations demonstrated that adsorbed oxygen is the most involved oxygen,and it has found that the pathway of producing propene oxide makes the reaction of C_3H_6over CuO surface more likely to ***,these findings revealed that CJSR combined with theoretical calculation is suitable for kinetic study,which can pave the way to investigate the kinetic study of other exhaust gases.

关键词： Novel catalytic jet-stirred reactor Heterogeneous kinetic study Exhaust emission control CuO thin film catalyst DFT calculation

维普期刊数据库

Machine learning in nutrient management:A review

在线全文

学校读者我要写书评

暂无评论

Artificial Intelligence in Agriculture 2023年第3期9卷 1-11页

作者： Oumnia Ennaji Leonardus Vergütz achraf El Allali Chair of Soil Science University Mohammed VI PolytechnicLot 660Hay Moulay RachidBenguerir 43150Morocco African Genome Center University Mohammed VI PolytechnicLot 660Hay Moulay RachidBenguerir 43150Morocco

In agriculture,precise fertilization and effective nutrient management are *** learning(ML)has recently been increasingly used to develop decision support tools for modern agricultural systems,including nutrient management,to improve yields while reducing expenses and environmental *** based systems require huge amounts of data from different platforms to handle non-linear tasks and build predictive models that can improve agricultural *** study reviews machine learning based techniques for estimating fertilizer and nutrient status that have been developed in the last decade.A thorough investigation of detection and classification approaches was conducted,which served as the basis for a detailed assessment of the key challenges that remain to be *** research findings suggest that rapid improvements in machine learning and sensor technology can provide cost-effective and thorough nutrient assessment and decision-making *** research directions are also recommended to improve the practical application of this technology.

关键词： Fertilization Nutrient management Machine learning