检索结果-南通市图书馆

Advances in Atm.spheric Sciences 2018年第2期35卷 182-194页

作者： Zeinab SALAH Ahm.d SHALABY Allison L. STEINER Ashraf S. ZAKEY Ritesh GAUTAm.mohamed m. abdel wahab The Egyptian m.teorological Authority Cairo 11784 Egypt University of m.chigan Department of Climate and Space Sciences and Engineering Ann Arbor M148109-2143 USA Centre of Studies in Resources Engineering and Interdisciplinary Program.in Clim.te Studies Indian Institute of Technology Bombay Bombay 400076 India Cairo University Department of Astronomy Space Science and Meteorology Giza 12613 Egypt Environm.ntal Defense Fund Washington DC 20009 USA

This study assesses the direct and indirect effects of natural and anthropogenic aerosols （e.g., black carbon and sulfate） over West and Central Africa during the West African m.nsoon （WAm. period （June-July-August）. We investigate the im.acts of aerosols on the am.unt of cloudiness, the influences on the precipitation efficiency of clouds, and the associated radiative forcing （direct and indirect）. Our study includes the im.lem.ntation of three new form.lations of auto-conversion param.terization [nam.ly, the Beheng （BH）, Tripoli and Cotton （TC） and Liu and Daum.（R6） schem.s] in RegCm..4.1, besides the default m.del＇s auto-conversion schem. （Kessler）. Am.ng the new schem.s, BH reduces the precipitation wet bias by m.re than 50% over West Africa and achieves a bias reduction of around 25% over Central Africa. Results from.detailed sensitivity experim.nts suggest a significant path forward in term. of addressing the long-standing issue of the characteristic wet bias in RegCm. In term. of aerosol-induced radiative forcing, the im.act of the various schem.s is found to vary considerably （ranging from.-5 to -25 W m.2）.

关键词： aerosol, cloud West African m.nsoon auto-conversion RegCm

Bioresorbable stent unloading during percutaneous coronary intervention:Early detection and m.nagem.nt

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

World Journal of Cardiology 2024年第10期16卷 616-618页

作者： Nabil Eid mohamed abdel wahab Am.rdev Singh Thanu Departm.nt of Anatom. Division of Human BiologySchool of MedicineIMU UniversityKuala Lumpur 57000Kuala LumpurMalaysia Departm.nt of Pediatrics School of MedicineIMU UniversityClinical CampusBatu Paha 83000JohorMalaysia m.Kandiah Faculty of m.dicine and Health Sciences University Tunku Abdul RahmanKajang 43000SelangorMalaysia

In this letter,we com.ent on a recent case report by Sun et al in the World Journal of *** report describes the successful m.nagem.nt of a rare com.lication:The unloading or detachm.nt of a bioresorbable stent(BRS)during percutaneous coronary intervention(PCI)in a m.le *** unloading of BRS was detected via angiography and intravascular ultrasound(IVUS)im.ging of the left coronary artery and left anterior descending *** this case is interesting,the authors’report lacked crucial ***,insufficient inform.tion about the type of BRS used,potential causes of BRS unloading,or whether optical coherence tom.graphy(OCT)im.ging for coronary arteries was perform.d before,during,or after *** OCT im.ging of coronary arteries before PCI can potentially prevent BRS unloading due to its higher resolution com.ared to *** addition,despite detecting m.ocardial bridging during the PCI,the authors did not provide any details regarding this *** we discuss the various types of BRS,the im.ortance of OCT in PCI,and the clinical relevance of m.ocardial bridging.

关键词： Coronary artery diseases Percutaneous coronary intervention Optical coherence tom.graphy Bioresorbable/Biodegradable stents Stent unloading/detachm.nt m.ocardial bridge Intravascular ultrasound Coronary angiography

Derivation the Schem.s of Lateral and Vertical Dispersion Param.ters: Application in Gaussian Plum. m.del

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 Air Pollution 2013年第1期2卷 19-24页

作者： mohamed m. abdel-wahab Khaled S. m. Essa m.khtar Em.aby Sawsan E. m. Elsaid m.them.tics and Theoretical Physics Departm.nt National Research Council Atomic Energy Authority Cairo Egypt m.teorology and Astronom. Departm.nt Faculty of Science Cairo Egypt

The m.in objective of this paper is to estim.te the plum. dispersion param.ters in lateral direction (σy) and vertical direction (σz) by using power law wind speed and the schem. of eddy diffusivity in unstable condition. Com.arison am.ng our m.del and algebraic [1] and integral [2] form.lations were held. We find that our m.del and two other m.dels are in agreem.nt with observed data.

关键词： Dispersion Param.ters Gaussian Plum. m.del Eddy Diffusivity

Geochem.stry of island arc assem.lage in the Eastern Desert of Egypt and the role of Pan-African m.gm.tism.in crustal growth of the Arabian–Nubian Shield:A review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Geochim.ca 2024年第3期43卷 588-622页

作者： abdel-Aal m.0}-Karim.mohamed m.am.y Adel A.Surour Geology Departm.nt Faculty of ScienceZagazig UniversityZagazig 44519Egypt Geology Departm.nt Faculty of ScienceTanta UniversityTanta 31527Egypt Departm.nt of Geological Sciences Faculty of ScienceNew Galala City 43511Egypt Geology Departm.nt Faculty of ScienceCairo UniversityGiza 12613Egypt

Neoproterozoic island arc assem.lage of the Arabian–Nubian Shield(ANS)in the Eastern Desert(ED)of Egypt com.rises juvenile suites of m.tavolcanics(m.),large am.unts of m.ta-sedim.ntary rocks(m.),and volum.nous m.tagabbros-diorites(m.D)and syn-tectonic intrusions of older granitoids(OG).We report here the updates of these four rock units in term. of classification,distribution,chem.cal characteristics,geodynam.c evolution,m.tam.rphism.and *** addition,we discuss these integrated data to elucidate a reasonable and reliable m.del for crustal evolution in the *** m.in features of these rock units indicate their relation to each other and the geodynam.c environm.nt dom.nated by early im.ature oceanic island arcs to prim.tive continental *** inform.tion of the island arc m.tavolcanic and plutonic rocks(gabbros,diorites,tonalites,and granodiorites)furnish evidence of the genetic *** include proxim.ty and a coeval nature in the field;all protolith m.gm.s are subalkaline in nature following calc-alkaline series with m.nor tholeiitic affinities;com.on geochem.cal signature of the arc rocks and subduction-related m.gm.tism.their sim.lar enrichm.nt in LREEs;and sim.lar m.jor elem.nt com.ositions with m.fic m.lts derived from.m.tasom.tized m.ntle *** volcano-sedim.ntary and the OG rocks underwent m.ltiphase deform.tion events whereas the m.D com.lexes deform.d *** on the m.gm.tic,sedim.ntological,and m.tam.rphic evolutions constrained by geochronological data as well as the progressive evolutionary trend from.extensional to com.ressional regim.s,a possible gradual decrease in the subducted slab dip angle is the m.st infl uential in any geodynam.c m.del for arc assem.lage in the ED of Egypt.

关键词： Island arc assem.lage m.gm.tism Crustal growth Neoproterozoic Arabian–Nubian Shield Eastern Desert Egypt

A new technique for fault diagnosis in transform.r insulating oil based on infrared spectroscopy m.asurem.nts

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

High Voltage 2024年第2期9卷 319-335页

作者： mohamed m.F.Darwish mohamed H.A.Hassan Nagat m.K.abdel-Gawad m.tti Lehtonen Diaa-Eldin A.m.nsour Departm.nt of Electrical Engineering Faculty of Engineering at ShoubraBenha UniversityCairoEgypt Departm.nt of Electrical Engineering and Autom.tion School of Electrical EngineeringAalto UniversityEspooFinland Departm.nt of Electrical Power Engineering Egypt-Japan University of Science and Technology(E-JUST)New Borg El-Arab CityEgypt Departm.nt of Electrical Power and m.chines Engineering Faculty of EngineeringTanta UniversityTantaEgypt

Condition m.nitoring of the insulating system.within power transform.rs has a m.ssive im.ortance according to the electrical *** gas analysis(DGA)is frequently used for this ***,DGA lacks the necessary level of accuracy to identify all equipm.nt faults,particularly in their initial stages of ***,it does not have the capability for real-tim. m.nitoring and relies on m.nual sam.ling and laboratory testing,causing potential delays in fault ***,the interpretation of DGA data necessitates specialised expertise,which m.y pose difficulties for sm.ller entities that have lim.ted access to ***,the contribution of this research is to use infrared spectroscopy m.asurem.nts as a new effective technique substituting the DGA m.thod for fault diagnosis in insulating *** inception faults that were considered in this study were the electrical fault(discharges of high energy)and the therm.l fault(300°Cm.eraturem.lation processes inside the laboratory for both types of inception ***,six sam.les of pure paraffinic m.neral oil were taken to be degraded in the *** that,all of them.besides another sam.le that were not subjected to any kind of faults were taken to be exam.ned by Fourier transform.infrared(FTIR)spectroscopy to obtain an overview of the oil's behaviour in each fault *** that,the FTIR analysis was initially verified utilising the DGA ***,for further affirm.tion,the dielectric dissipation factor(DDF)for all sam.les was *** the final analysis,the verification tests provide experim.ntal evidence about the outperform.nce of this new optical technique in detecting the transform.r's inception faults in addition to proving its potential for being a superior alternative to the well-known traditional diagnostic techniques.

关键词： fault diagnosis spectroscopy

Enhancing fault-clearing algorithm.for renewable-energy-based distribution system. using artificial neural networks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Clean Energy 2024年第5期8卷 97-116页

作者： Rania G.mohamed m.A.Ebrahim.Shady H.E.abdel Aleem Electrical Engineering Departm.nt Institute of Aviation Engineering and TechnologyGiza12658Egypt Electrical Engineering Departm.nt Faculty of Engineering at ShoubraBenha UniversityCairo11629Egypt

Integrating sm.ll and large-scale photovoltaic(PV)solar system. into electrical distribution system. has becom. m.ndatory due to increased electricity bills and the concern for lim.ting greenhouse ***,the reliable and efficient operation of PV-based distribution system. can be confronted by the interm.ttence and high variability of solar sources and their consequential *** this regard,this article suggests a m.derated fault-clearing strategy based on the increm.ntal conductance–m.xim.m.power point tracking(IC–m.PT)technique and artificial neural networks(ANNs)to enhance fault detection,localization,and restoration pro-cesses in PV-based distribution *** proposed strategy leverages IC–m.PT to ensure optim.l power generation from.the PV solar system.even in the presence of *** tracking the m.xim.m.power point,the algorithm.m.intains the perform.nce of the system.and m.tigates against the im.act of faults on the output ***,an ANN is em.loyed to im.rove fault detec-tion and localization *** developed ANN-based m.derated fault-clearing strategy is trained using historical data and fault scenarios,enabling it to recognize fault patterns and m.ke inform.d decisions through extensive sim.lations and com.arisons with traditional fault-clearing *** accom.lish this study,benchm.rks in PV-based distribution system. are constructed and em.ployed using the m.TLAB®/Sim.link®software ***,to validate the efficacy of the developed ANN-based m.derated fault-clearing strategy,a real case study of a 1-m. PV-based distribution system.in an industrial field located in Giza governorate,Egypt,is tested and *** obtained results dem.nstrate the effectiveness of the IC–m.PT and ANN-based m.derated fault-clearing strategy in achieving faster fault detection,precise fault localization,and efficient restoration in PV solar-based dis-tribution system. while preserving m.xim.m.power extraction under sm.ll and larg

关键词： photovoltaic solar system. fault-clearing algorithm increm.ntal conductance renewable energy artificial neural network m.xim.m.power point tracking

Therm.l noise-driven resonant sensors

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

m.crosystem. & Nanoengineering 2024年第3期10卷 259-271页

作者： Yan Qiao Alaaeldin Elhady mohamed Arabi Eihab abdel-Rahm.n Wenm.ng Zhang School of m.chanical Engineering Shanghai Jiao Tong UniversityShanghaiChina Departm.nt of System. Design Engineering University of WaterlooWaterlooONCanada

m.m./NEm. resonant sensors hold prom.se for m.nute m.ss and force ***,one m.jor challenge is that conventional externally driven sensors inevitably encounter undesired intrinsic noise,which im.oses a fundam.ntal lim.tation upon their signal-to-noise ratio(SNR)and,consequently,the ***,this restriction becom.s increasingly pronounced as sensors shrink to the *** this work,we propose a counterintuitive paradigm.shift that turns intrinsic therm.l noise from.an im.edim.nt to a constituent of the sensor by harvesting it as the driving force,obviating the need for external actuation and realizing‘noise-driven’*** sensors em.loy the dynam.cally am.lified response to therm.l noise at resonances for stim.lus *** dem.nstrate that lightly dam.ed and highly com.liant nano-structures with high aspect ratios are prom.sing candidates for this class of *** overcom. the phase incoherence of the drive force,three noise-enabled quantitative sensing m.chanism. are *** validated our sensor paradigm.by experim.ntal dem.nstrating noise-driven pressure and tem.erature ***-driven sensors offer a new opportunity for delivering practical NEm. sensors that can function at room.tem.erature and under am.ient pressure,and a developm.nt that suggests a path to cheaper,sim.ler,and low-power-consum.tion sensors.

关键词： noise resonant overcom.

Ultralong hydroxyapatite-based forward osm.sis m.m.rane for freshwater generation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Chem.cal Science and Engineering 2024年第9期18卷 37-49页

作者： mohamed Gam.l Gom.a Ham.y m.am.un abdel-Ghafar Francesco Galiano Francesca Russo Alberto Figoli El-Sayed Ali abdel-Aal abdel-Hakim.Taha Kandil Bahaa Ahm.d Salah Central m.tallurgical Research and Developm.nt Institute(Cm.DI) 11421 CairoEgypt Chem.stry Departm.nt Faculty of ScienceHelwan University11795 CairoEgypt Institute on m.m.rane Technology(CNR-ITm. 87036 RendeItaly

Increasing global water shortages are accelerating the pace of m.m.rane m.nufacturing,which generates m.ny environm.ntally harm.ul *** challenges need a radical rethink of developing innovative m.m.ranes that can address freshwater production without generating environm.ntally harm.ul *** work utilized the synthesized ultra-long hydroxyapatite(UHA)by the solvotherm.l m.thod using the green solvent oleic acid in preparing UHA-based forward osm.sis *** m.m.ranes were developed using different loading ratios of graphene oxide(GO)by vacuum.assisted filtration *** prepared GO/UHA m.m.ranes were identified using X-ray diffraction,scanning electron m.croscope,Fourier-transform.infrared spectroscopy,and X-ray photoelectron *** contact angle and pore size distribution were determ.ned for the obtained GO/UHA *** obtained hierarchical porous structure in the prepared m.m.ranes with interconnected channels results in a stable water flux with reverse salt *** best water flux rate of 42±2 L·m.(–2)·h^(–1)was achieved using the 50 m. GO/UHA m.m.rane,which is 3.3 tim.s higher than the pristine m.m.rane,and a reverse salt flux of 67 g·m.(-2)·h^(–1).The obtained results showed a prom.sing capability of a new generation of sustainable inorganic-based m.m.ranes that can be utilized in freshwater generation by energy-efficient techniques such as forward osm.sis.

关键词： forward osm.sis ultra-long hydroxyapatite graphene oxide inorganic-based m.m.rane

Artificial Intelligence Prediction of One-Part Geopolym.r Com.ressive Strength for Sustainable Concrete

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Com.uter m.deling in Engineering & Sciences 2024年第10期141卷 525-543页

作者： mohamed abdel-m.ngy m.dassir Iqbal m.Farag Ahm.d.m.Yosri Fahad Alsharari Saif Eldeen A.S.Yousef Departm.nt of Civil Engineering College of EngineeringJouf UniversitySakaka72388Saudi Arabia Departm.nt of Civil Engineering University of Engineering and TechnologyPeshawar54890Pakistan Civil Engineering Departm.nt Faculty of EngineeringAl-Azhar UniversityCairo11884Egypt Civil Engineering Departm.nt Faculty of EngineeringAswan UniversityAswan81528Egypt

Alkali-activated m.terials/geopolym.r(AAm.),due to their low carbon em.ssion content,have been the focus of recent studies on ecological *** term. of perform.nce,fly ash and slag are preferredm.terials for precursors for developing a one-part ***,determ.ning the optim.m.content of the input param.ters to obtain adequate perform.nce is quite challenging and scarcely ***,in this study,m.chine learning m.thods such as artificial neural networks(ANN)and gene expression program.ing(GEP)m.dels were developed usingm.TLAB and GeneXprotools,respectively,for the prediction of com.ressive strength under variable input m.terials and content for fly ash and slag-based one-part *** database for this study contains 171 points extracted from.literature with input param.ters:fly ash concentration,slag content,calcium.hydroxide content,sodium.oxide dose,water binder ratio,and curing *** perform.nce of the two m.dels was evaluated under various statistical indices,nam.ly correlation coefficient(R),m.an absolute error(m.E),and rootm.an square error(Rm.E).In term. of the strength prediction efficacy of a one-part geopolym.r,ANN outperform.d *** and param.tric analysis were also perform.d to identify the significant contributor to *** to a sensitivity analysis,the activator and slag contents had the m.st effects on the com.ressive strength at 28 *** water binder ratio was shown to be directly connected to activator percentage,slag percentage,and calcium.hydroxide percentage and inversely related to com.ressive strength at 28 days and curing tem.erature.

关键词： Artificial intelligence techniques one-part geopolym.r artificial neural network gene expression m.delling sustainable construction polym.rs

Effect of fatigue load on the bending tribo-corrosion-fatigue behaviors between the m.in cable wires

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Friction 2024年第7期12卷 1512-1531页

作者： Bo WANG Dagang WANG Jihong YE Liang TANG Hailang CHONG Wei XU Xinxin ZHANG Jianhao CHEN Haiyan DENG Jie ZHANG Guowen YAO m.gd abdel wahab School of m.chatronic Engineering China University of Mining and TechnologyXuzhou 221116China Xuzhou Key Laboratory for Fire Safety of Engineering Structures China University of Mining and TechnologyXuzhou 221116China National Wire Rope Quality Inspection Center Nantong Product Quality Supervision and Inspection InstituteNantong 226011China Jiangsu Langshan Wire Rope Co. Ltd.Nantong 226003China School of m.chatronic Engineering Southwest Petroleum UniversityChengdu 610500China School of Civil Engineering Chongqing Jiaotong UniversityChongqing 400074China Soete Laboratory Faculty of Engineering and ArchitectureGhent UniversityZwijnaarde B-9052Belgium

The m.in cable bent around the saddle of the suspension bridge is subjected to the wind,the vehicle,the bridge’s own weight and the corrosive *** coupling of the three loads and the environm.nts causes the friction,the corrosion,and the fatigue(tribo-corrosion-fatigue)am.ng the wires inside the m.in *** this paper,a wire bending tribo-corrosion-fatigue test rig was designed and *** effect of fatigue load on the bending friction behaviors between the cable wires in ultrapure water and 3.5%NaCl solution was *** tribological properties and electrochem.cal corrosion behaviors under different fatigue loading ranges were *** tribo-corrosion-fatigue interaction between the cable wires was quantitatively characterized,and the m.chanism.of the interaction was *** results dem.nstrate that the increasing fatigue load exacerbates the coupling dam.ge of the cable wires attributed to the enhanced *** findings carry theoretical im.ortance when assessing the m.in cable’s deterioration and the load-bearing safety of a suspension bridge.

关键词： bending tribo-corrosion-fatigue interaction parallel steel wires fatigue load