检索结果-南通市图书馆

The role of morphology on the electrochemical CO_(2) reduction performance of transition metal-based catalysts

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 Energy Chemistry 2023年第10期85卷 198-219,I0007页

作者： Umar mustapha Chidera C.Nnadiekwe Maria Abdulkarim Alhaboudal Umar Yunusa Abdulhakam Shafiu Abdullahi Ismail Abdulazeez Ijaz Hussain Saheed A.Ganiyu Abdulaziz A.Al-Saadi Khalid Alhooshani Department of Chemistry King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia Interdisciplinary Research Center for Refining&Advanced Chemicals King Fahd University of Petroleum&MineralsDhahran 31261Saudi Arabia Interdisciplinary Research Center for Membranes and Water Security King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia

The continued increase in population and the industrial revolution have led to an increase in atmospheric carbon dioxide(CO_(2)) concentration. Consequently, developing and implementing effective solutions to reduce CO_(2) emissions is a global priority. The electrochemical CO_(2) reduction reaction(CO_(2)RR) is strongly believed to be a promising alternative to fossil fuel-based technologies for the production of value-added chemicals. So far, the implementation of CO_(2)RR is hindered by associated electrochemical reactions, such as low selectivity, hydrogen evolution reaction(HER), and additional overpotential induced in some cases. As a result, it is necessary to conduct a timely evaluation of the state-of-the-art strategies in CO_(2)RR, with a focus on the engineering of the electrocatalytic systems. Catalyst morphology is one factor that plays a critical role in overcoming these drawbacks and significantly contributes to enhancing product selectivity and Faradaic efficiency(FE). This review article summarizes the recent advances in the rational design of electrocatalysts with various morphologies and the influence of these morphologies on CO_(2)RR. To compare literature findings in a meaningful way, the article focuses on results reported under a well-defined period and considers the first three rows of the d-block metal catalysts. The discussion typically covers the design of nanostructured catalysts and the molecular-level understanding of morphology-performance relationship in terms of activity, selectivity, and stability during CO_(2) electrolysis. Among others, it would be convenient to recommend a comprehensive discussion on the morphologies of single metals and heterostructures, with a detailed emphasis on their impact on CO_(2) conversion.

关键词： CO_(2)electroreduction Electrochemical reduction of CO_(2) Morphology Catalysts d-block metals catalysts Faradaic efficiency Selectivity

Lithological Mapping Using Landsat 8 OLI in the Meso-Cenozoic Tarfaya Laayoune Basin (South of Morocco): Comparison between ANN and SID Classification

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Open Journal of Geology 2021年第12期11卷 658-681页

作者： Amine Bouwafoud mustapha Mouflih Abdelmajid Benbouziane Hassan II University of Casablanca Faculty of Sciences Ben M’sik Geosciences and Application Laboratory (LGA) Sidi Othmane Casablanca Morocco

In the Saharian domain, the Tarfaya-Laayoune coastal basin developed in a stable passive margin, where asymmetrical sedimentation increase from East to West and reach a sediment stack of about 14 kilometers. However, the morphology of the studied area corresponds to a vast plateau (hamada) presenting occasional major reliefs. For this purpose, remote sensing approach has been applied to find the best approaches for truthful lithological mapping. The two supervised classification methods by machine learning (Artificial Neural Network and Spectral Information Divergence) have been evaluated for a most accurate classification to be used for our lithofacies mapping. The latest geological maps and RGB images were used for pseudo-color groups to identify important areas and collect the ROIs that will serve as facilities samples for the classifications. The results obtained showed a clear distinction between the various formation units, and very close results to the field reality in the ANN classification of the studied area. Thus, the ANN method is more accurate with an overall accuracy of 92.56% and a Kappa coefficient is 0.9143.

关键词： Tarfaya-Laayoune Basin Geological Mapping Supervised Classification Artificial Neural Network Spectral Information Divergence

Socio-Demographic Factors Associated with Psychoactive Substance Use among Commercial Motorcycle Operators in Kano, Nigeria

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Psychiatry 2016年第1期6卷 76-85页

作者： mustapha Ibrahim Gudaji Zahraddeen Garba Habib Department of Psychiatry Faculty of Clinical Sciences College of Health Sciences Bayero UniversityKano Nigeria Aminu Kano Teaching Hospital Kano Nigeria

Background: Psychoactive substance use was common among commercial motorcycle operators. Studies had shown that there were some socio-demographic factors which were commoner among commercial motorcycle operators who used psychoactive substances. However, this was not explored among commercial motorcycle operators in Kano, North Western Nigeria. Aim: The aim of the study was to determine the socio-demographic factors associated with psychoactive substance use among motorcycle operators in Kano, Northwestern Nigeria. Methods: It was a cross-sectional study. Instrument used for data collection included socio-demographic questionnaire and World Health Organisation Student Drug Use Questionnaire. Data analysis was done using Statistical Package for Social Sciences (SPSS) 16th edition. Results: Commercial motorcycle operators who used substances were found to be of younger age group (X2 = 10.9, P 2 = 4.3, P = 0.034) and had a father who used tobacco (X2 = 4.28, P = 0.04). Participants who were single were more likely to use inhalants (X2 = 21.06, P =0.001), opiates (X2 = 11.82, P = 0.012), cannabis (X2 = 5.12, P = 0.028) and stimulants (X2 = 5.12, P = 0.028) compared to those who were married. Conclusion: This study found that being of younger age, being single, and having a father who smoked were significantly associated with psychoactive substance use. Participants who were singles were more likely to use inhalants, opiates, cannabis and stimulants. No relationship was observed between the age of the respondents and specific substance use. Legislations should be enacted to reduce the rate of psychoactive substance use among motorcycle operators and general population at large.

关键词： Psycho-Active Substance Sociodemographic Factors Motorcycle Operators SDUQ Nigeria

Diffusion tensor imaging pipeline measures of cerebral white matter integrity: An overview of recent advances and prospects

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2022年第24期10卷 8450-8462页

作者： Amanina Ahmad Safri Che Mohd Nasril Che Mohd Nassir Ismail Nurul Iman Nur Hartini Mohd Taib Anusha Achuthan Muzaimi mustapha Department of Neurosciences School of Medical SciencesUniversiti Sains MalaysiaHealth CampusKubang Kerian 16150KelantanMalaysia Department of Radiology School of Medical SciencesUniversiti Sains MalaysiaHealth CampusKubang Kerian 16150KelantanMalaysia School of Computer Sciences Universiti Sains Malaysia11800 USMPenangMalaysia Department of Neurosciences Hospital Universiti Sains MalaysiaKubang Kerian 16150KelantanMalaysia

Cerebral small vessel disease(CSVD)is a leading cause of age-related microvascular cognitive decline,resulting in significant morbidity and decreased quality of *** a progress on its key pathophysiological bases and general acceptance of key terms from neuroimaging findings as observed on the magnetic resonance imaging(MRI),key questions on CSVD remain *** relationships and reliable lesion studies,such as white matter tractography using diffusion-based MRI(dMRI)are necessary in order to improve the assessment of white matter architecture and connectivity in *** tensor imaging(DTI)and tractography is an application of dMRI that provides data that can be used to non-invasively appraise the brain white matter connections via fiber tracking and enable visualization of individual patient-specific white matter fiber tracts to reflect the extent of CSVD-associated white matter ***,due to a lack of standardization on various sets of software or image pipeline processing utilized in this technique that driven mostly from research setting,interpreting the findings remain contentious,especially to inform an improved diagnosis and/or prognosis of CSVD for routine clinical *** this minireview,we highlight the advances in DTI pipeline processing and the prospect of this DTI metrics as potential imaging biomarker for CSVD,even for subclinical CSVD in at-risk individuals.

关键词： Diffusion tensor imaging White matter Cerebral small vessel disease Pipeline processing Tractography

Intelligence Way from Eco-friendly Synthesis Strategy of New Heterocyclic Pyrazolic Carboxylic a-Amino Esters

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2020年第6期36卷 1183-1189页

作者： EI Houssine MABROUK Nadia ARROUSSE Adil KORCHI Mohammed LACHGAR Ahmad OUBAIR Abdelrhani ELACHQAR Mohamed JABHA Mohammed LACHKAR Fadoua El HAJJAJI Zakia RAIS mustapha TALEB Laboratory of Materials Engineering for the Environment&Natural Resources Department of ChemistryFaculty of Sciences and TechnicsBP 509 BoutalamineErrachidiaMoulay Ismail University MeknesMorocco Laboratory of Engineering OrganometallicMolecular and Environment(LlMMOME)Faculty of SciencesUniversity Sidi Mohamed Ben AbdellahB.P.1796FezMorocco Faculty of Sciences and Technologies University Sidi Mohamed Ben AbdellahFezMorocco Department of Chemistry Faculty of Sciences Dhar El MahrazUniversity Sidi Mohamed Ben AbdellahB.P.1796FezMorocco Natural Resources and Environment Team(RN&E) Faculty of Sciences and TechnicsErrachidiaMoulay Ismail UniversityMorocco

The a-amino acid derivatives constitute a class of compounds of particular medicinal and synthetic attention and considerable interest has been devoted to their synthesis in recent *** the present work,we develop the computational study of the synthesis reaction of new pyrazolyl a-amino esters derivatives using the Gaussian 09based on the DET/B3LYP density functional theorv method,with the base 6-31G(d.p)to ensure the possibility of carrying out these reactions within the laboratory of ***,this research has encouraged us to establish an economical synthesis strategy of these products in overall vields of 73.5%to 87%to have access to new active biomolecule through the O-alkvlation reaction between methyl a-azidoglycinate N-benzoylated and primary pyrazole alcohols(3,5-dimethyl-1 H-pyrazol-1-yl)methanol,(1H-pyrazol-1-yl)methanol and(3-ethoxy-5-methyl-1H-pyrazol-1yl)methanoll under different operating *** structure of the prepared heterocyclic systems was characterized by conventional spectroscopic techniques,like H NMR.I3℃NMR,and *** results revealed that the experimental study is in good correlation with the computational one.

关键词： a-Pyrazolyl amino ester Methyl a-azido glycinate N-benzoylated O-Alkylation DFT/B3LYP/6-31G(d,p)

D-InSAR Analysis of Sentinel-1 Data for Landslide Detection in Northern Morocco, Case Study: Chefchaouen

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 Geoscience and Environment Protection 2020年第7期8卷 84-103页

作者： Azizi Bouchra Hakdaoui mustapha Raji Mohammed Laboratory of Applied Geology Geomatics and Environment Hassan II University of Casablanca Faculty of Sciences Ben M’sik Casablanca Morocco

Land surface displacement caused by landslides is among the most damaging phenomena in northern Morocco. In this paper, we measure ground deformation in the Chefchaouen area which is a zone characterized by geological formations and structurally complex losses that promote instability (landslide, mudflow, block falls, etc.) leading to slow to extremely slow deformation phenomena, which require an interferometric study, using the DinSAR (differential interferometric synthetic Aperture Radar) technique with sentinel 1 images in bance C, which is a powerful tool for the detection and analysis of interferences and monitoring of ground deformations. We worked on four areas of the study area. Its points are provided by the direction of the roads, which generates Interferograms and then deformation maps with precision in mm/year.

关键词： Landslides Slopes SAR DInSAR Interferometric Synthetic Aperture Radar Sentinel 1

A study of scientific publications on the greater cane rat (Thryonomys swinderianus, Temminck 1827)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Animal Models and Experimental Medicine 2020年第1期3卷 40-46页

作者： Oluwaseun Ahmed mustapha Ebunoluwa Elizabeth Teriba Oluwaseun Samuel Ezekiel Ayokunle Matthew Olude Adebayo Koyuum Akinloye James Olukayode Olopade Department of Veterinary Anatomy College of Veterinary MedicineFederal University of AgricultureAbeokutaNigeria Department of Veterinary Anatomy Faculty of Veterinary MedicineUniversity of IbadanIbadanNigeria Department of Animal Production and Health Federal University of Technology AkureAkureNigeria

Background:The greater cane rat(GCR),reputed to be African's second largest rodent,is a precocial hystricomorph with an uncommon phenotype and life *** and socio-economic interests in the GCR have led to heightened research efforts targeted towards a better understanding of its biology and exploration of its economic and translational ***:Records of all online scientific publications on the GCR from Google,Google Scholar,PubMed,***,Ebscohost and Worldwide science,with the exception of research theses,proceedings,unpublished projects and abstracts,were collated and analyzed using descriptive ***:A total of 146 published scholarly articles spanning about six decades were retrieved,with 98%of the GCR publications originating from African *** boasts the highest number of publications(58.22%)followed by Ghana(21.23%)and South Africa(5.48%)while Senegal contributed the least(0.69%).Publications were sorted into ten field *** field with the highest number of articles(41.78%)was animal breeding and management recording,closely followed by anatomy(37.67%).Lesser contributions were made by parasitology(5.48%),biochemistry/hematology(4.8%),pharmacology/toxicology(4.11%),pathology(2.06%),and surgery/anesthesia and physiology(1.37%apiece).The fields with fewest contributions were microbiology and developmental biology(0.69%each).Conclusion:This study chronicles the spectrum of knowledge available on the GCR,highlighting the knowledge gap that still exists in various fields in order to provide advocacy for new frontiers in research efforts on this *** suggest the need for a clearly defined and well integrated national/regional policy aimed at establishing Africa's foremost micro-livestock rodent,the greater cane rat,on the world's scientific radar.

关键词： African rodent grasscutter greater cane rat micro-livestock review wildlife

State Space Model Predictive Control of an Aerothermic Process with Actuators Constraints

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Intelligent Control and Automation 2012年第1期3卷 50-58页

作者： mustapha Ramzi Hussein Youlal Mohamed Haloua ASTIMI Laboratory High School of Technology Université Mohammed V Agdal Rabat Morocco Automatic Laboratory Mohammadia School of Engineering Rabat Morocco UFR Automatic and Information Technologies Faculty of Science Rabat Morocco

This paper investigates State Space Model Predictive Control (SSMPC) of an aerothermic process. It is a pilot scale heating and ventilation system equipped with a heater grid and a centrifugal blower, fully connected through a data acquisition system for real time control. The interaction between the process variables is shown to be challenging for single variable controllers, therefore multi-variable control is worth considering. A multi-variable state space model is obtained from on-line experimental data. The controller design is translated into a Quadratic Programming (QP) problem, in which a cost function subject to actuators linear inequality constraints is minimized. The outcome of the experimental results is that the main control objectives, such as set-point tracking and perturbations rejection under actuators constraints, are well achieved for both controlled variables simultaneously.

关键词： Multi-Variable Control Aerothermic Process Actuators Constraints Process Identification State Space Model Predictive Control

Distinct and combined impacts of climate and land use scenarios on water availability and sediment loads for a water supply reservoir in northern Morocco

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Soil and Water Conservation Research 2020年第2期8卷 141-153页

作者： Fatiha Choukri Damien Raclot mustapha Naimi Mohamed Chikhaoui Joao Pedro Nunes Frédéric Huard Cécile Hérivaux Mohamed Sabir Yannick Pépin IAV Hassan II Department of Natural Resources and EnvironmentMadinat Al IrfaneRabatMorocco LISAH Univ MontpellierINRAEIRDInstitut AgroMontpellierFrance CE3C-Centre for Ecology Evolution and Environmental ChangesFaculdade de CienciasUniversidade de Lisboa1749-016LisboaPortugal INRAE-AgroClim 228 Route de l’AérodromeCS 4050984914AvignonCedex 9France BRGM Univ Montpellier1039 Rue de Pinville34000MontpellierFrance ENFI bd Moulay YoussefTabriquetSALEMorocco

The objective of this study was to examine the impacts of climate and land use changes on wateravailability and sediment loads for a water supply reservoir in northern Morocco using data-intensive simulation models in a data-scarce region. Impacts were assessed by comparing the simulated water and sediment entering the reservoir between the future period 2031-2050 and the 1983-2010 reference period. Three scenarios of land use change and two scenarios of climate change were developed in the Tleta watershed. Simulations under current and future conditions were performed using the Soil and Water Assessment Tool (SWAT) model. The simulations showed that climate change will lead to a sig-nificant decrease in the annual water supply to the reservoir (-16.9% and -27.5%) and in the annual volume of sediment entering the reservoir (-7.4% and -12.6%), depending on the climate change sce-narios tested. The three scenarios of land use change will lead to a moderate change in annual water inflow into the reservoir (between-6.7% and +6.2%), while causing a significant decrease in sediment entering the reservoir (-37%to-24%). The combined impacts of climate and land use changes will cause a reduction in annual water availability (-9.9%to-33.3%) and sediment supplies (-28.7%to-45.8%). As a result, the lifetime of the reservoir will be extended, but at the same time, the risk of water shortages will increase, especially from July to March. Therefore, alternative water resources must be considered.

关键词： Climate change Land use change SWAT Runoff Reservoir management Morocco