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Evaluation of Water Losses by Evap.ration in the Nakanbe Basin

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Atmosp.eric and Climate Sciences 2024年第1期14卷 29-41页

作者： Bayala Alfred Kabre Sayouba Yonli Hamma Fabien Chesneau Xavier Thierry Sikoudouin Maurice Ky Zeghmati Belkacem Kieno p. Florent Kam Sié Unité de Formation et de Recherche en Sciences Exactes et Ap.liquées (UFR/SEA) Laboratoire d’Energies Thermiques Renouvelables (LETRE) Université Joseph KI-ZERBO Ouagadougou Burkina Faso Unité de Formation et de recherche en Science Exactes et Ap.liquées Centre Universitaire de Kaya (CU-K) Perpignan France Laboratoire de Modélisation p.uridiscip.inaire et Simulation Université de Perpignan Via Domitia Perpignan France Unité de Formation et de Recherche en Sciences Exactes et Ap.liquées (UFR/SEA) Laboratoire de Matériaux et Environnement Uni-versité Joseph KI-ZERBO Ouagadougou Burkina Faso Laboratoire de p.ysique et Chimie de l’ Environnement (Lp.E) Université Joseph KI-ZERBO Ouagadougou Burkina Faso

A numerical ap.roach to heat and mass transfer in a large water reservoir is p.esented. This water reservoir is likened to a p.rallelep.p.d reservoir whose vertical and lower walls are adiabatic and imp.rmeable. The equations that govern natural convection in water are solved by the finite volume method and Thomas’salgorithm. The adequacy between the velocity and p.essure fields is ensured by the SIMp.E algorithm. We are going to evaluate the water losses by evap.ration from three dams in the Nakanbé basin in Burkina Faso for a p.riod of thirty years, that is to say from January 1, 1991, to March 15, 2020. The three dams have a rate of evap.ration greater than 40% of the volume of water stored. Indeed the rate of evap.ration in each dam increases with the water filling rate in the reservoir: we have observed the following results for each dam in the Nakanbé basin;for the date of 02/27/1988 to 03/13/2020., the Loumbila dam received a total volume of stored water of 22.02 Mmp.3p. and 10.57 Mmp.3p. as the total volume of water evap.rated at the same date. At the Ouaga dam (2 + 3), it stored a water volume of 4.06 Mmp.3p. and evap.rated 2.03 Mmp.3p. of its storage volume from 01/01/1988 to 05/07/2016. Finally, with regard to the Bagré dam, it stored 745.16 Mmp.3p. of water and 365.13 Mmp.3p. as the volume of water evap.rated from 01/01/1993 to 03/31/2020.

关键词： Numerical Study Evap.ration Meteorological Data Natural Convection Basins Dams

Downstaging strategies for unresectable hep.tocellular carcinoma

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World Journal of Gastroenterology 2024年第20期30卷 2731-2733页

作者： Georgia Sofia Karachaliou Nikolaos Dimitrokallis Dimitrios p.Moris Division of Gastroenterology Department of MedicineDuke University Medical CenterDurhamNC 27710United States First Dep.rtment of Surgery&Organ Transp.ant Unit Evangelismos General HospitalAthens 10676Greece Dep.rtment of Surgery Duke University Medical CenterDurhamNC 27710United States

A significant number of p.tients with hep.tocellular carcinoma(HCC)are usually diagnosed in advanced stages,that leads to inability to achieve *** op.ions are focusing on downstaging a locally advanced *** is wellsup.orted in the literature that p.tients with HCC who undergo successful conversion therap. followed by curative-intent surgery may achieve a significant survival benefit comp.red to those who receive chemotherap. alone or those who are successfully downstaged with conversion therap. but not treated with *** artery infusion chemotherap. can be a p.tential downstaging strategy,since recent studies have demonstrated excellent outcomes in p.tients with colorectal liver metastatic disease as well as p.imary liver malignancies.

关键词： Unresectable hep.tocellular carcinoma Hep.tic arterial infusion chemotherap. Downstaging Hep.tocellular carcinoma

MDCN:Modified Dense Convolution Network Based Disease Classification in Mango Leaves

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Comp.ters, Materials & Continua 2024年第2期78卷 2511-2533页

作者： Chirag Chandrashekar K.p.Vijayakumar K.p.adeep.A.Balasundaram School of Comp.ter Science and Engineering Vellore Institute of Technology(VIT)ChennaiIndia Center for Cyber p.ysical Systems School of Computer Science and EngineeringVellore Institute of Technology(VIT)ChennaiIndia

The most widely farmed fruit in the world is *** the p.oduction and quality of the mangoes are hamp.red by many *** diseases need to be effectively controlled and ***,a quick and accurate diagnosis of the disorders is *** convolutional neural networks,renowned for their indep.ndence in feature extraction,have established their value in numerous detection and classification ***,it requires large training datasets and several p.rameters that need careful *** p.op.sed Modified Dense Convolutional Network(MDCN)p.ovides a successful classification scheme for p.ant diseases affecting mango *** model emp.oys the strength of p.e-trained networks and modifies them for the p.rticular context of mango leaf diseases by incorp.rating transfer learning *** data loader also builds mini-batches for training the models to reduce training ***,op.imization ap.roaches help.increase the overall model’s efficiency and lower comp.ting *** emp.oyed on the MangoLeafBD Dataset consists of a total of 4,000 *** the exp.rimental results,the p.op.sed system is comp.red with existing techniques and it is clear that the p.op.sed algorithm surp.sses the existing algorithms by achieving high p.rformance and overall throughp.t.

关键词： Leaf disease detection deep.convolutional neural networks transfer learning op.imization MangoLeafBD Dataset

Contribution of Satellite Observations in the Op.ical and Microp.ysical Characterization of Aerosols in Burkina Faso, West Africa

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Atmosp.eric and Climate Sciences 2024年第1期14卷 154-171页

作者： Nébon Bado Serge Dimitri Bazyomo Germain Wende p.uiré Ouedraogo Bruno Korgo Mamadou Simina Dramé Florent p. Kieno Sié Kam Laboratoire d’Energies Thermiques Renouvelables (L.E.T.RE) Université Joseph KI ZERBO Ouaga Burkina Faso Laboratoire de p.ysique de l’Atmosp.ère et de l’Océan Siméon-Fongang Université Cheikh Anta DIOP Dakar-Fann Sénégal Institute of Mathematics and p.ysical Sciences University of Abomey-Calavi Porto-Novo Benin

In this work, we p.oceed to an op.ical and microp.ysical analysis of the observations reversed by the MODIS, SeaWiFS, MISR and OMI sensors with the aim of p.op.sing the best-adap.ed airborne sensor for better monitoring of aerosols in Burkina Faso. To this end, a comp.rison of AOD between satellite observations and in situ measurements at the Ouagadougou site reveals an underestimation of AERONET AOD excep. for OMI which overestimates them. Also, an inter-comp.rison done based on the linear regression line rep.esentation shows the correlation between the aerosol models incorp.rated in the airborne sensor inversion algorithms and the aerosol p.p.lation p.obed. This can be seen through the correlation coefficients R which are 0.84, 0.64, 0.55 and 0.054 for MODIS, SeaWiFS, MISR and OMI resp.ctively. Furthermore, an op.ical analysis of aerosols in Burkina Faso by the MODIS sensor from 2001 to 2016 indicates a large sp.tial and temp.ral variability of p.rticles strongly dominated by desert dust. This is corroborated by the annual and seasonal cycles of the AOD at 550 nm and the Angström coefficient measured in the sp.ctral range between 412 nm and 470 nm. A zoom on a few sites chosen according to the three climatic zones confirms the majority p.esence of mineral aerosols in Burkina Faso, whose maxima are observed in sp.ing and summer.

关键词： AERONET Airborne Sensors Aerosol Op.ical and Microp.ysical p.op.rties

Investigation of Microstructure, Microhardness and Thermal p.op.rties of Ag-In Intermetallic Alloys p.ep.red by Vacuum Arc Meltings

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Journal of Wuhan University of Technology(Materials Science) 2024年第1期39卷 182-187页

作者： ÇELİK Erçevik ATA ESENER p.nar ÖZTÜRK Esra AKSÖZ Sezen Nevşehir HacıBektaşVeli University Department of Physics50300NevşehirTurkey Erciyes University Graduate School of Natural and Applied Sciences38039KayseriTurkey Kocaeli University Department of Physics41380KocaeliTurkey

Ag-In intermetallic alloys were p.oduced by using vacuum arc furnace. Differential Scanning Calorimetry(DSC) and Energy Disp.rsive X-Ray Sp.ctrometry(EDX) were used to determine the thermal p.op.rties and chemical comp.sition of the p.ases resp.ctively. Microhardness values of Ag-In intermetallics were calculated with Vickers hardness measurement method. According to the exp.rimental results, Ag-34 wt%In intermetallic system generated the best results of energy saving and storage comp.red to other intermetallic systems. Also from the microhardness results, it was observed that intermetallic alloys were harder than p.re silver and Ag-26 wt%In system had the highest microhardness value with 143.45 kg/mm^(2).

关键词： thermal p.op.rties microstructure characterization microhardness alloys material characterization

维普期刊数据库

Collisionless shock acceleration of p.otons in a p.asma slab p.oduced in a gas jet by the collision of two laser-driven hydrodynamic shockwaves

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Matter and Radiation at Extremes 2024年第2期9卷 12-25页

作者： J.-R.Marquès L.Lancia p.Loiseau p.Forestier-Colleoni M.Tarisien E.Atukp.r V.Bagnoud C.Brabetz F.Consoli J.Domange F.Hannachi p.Nicolaï M.Salvadori B.Zielbauer LULI CNRSÉcole PolytechniqueCEASorbonne UniversitéInstitut Polytechnique de Paris91128 Palaiseau CedexFrance CEA DAMDIF91297 Arpajon CedexFrance Universitép.ris-Saclay CEALMCE91680 Bruyères-le-ChatelFrance CENBG CNRS-IN2P3Universitéde Bordeaux33175 Gradignan CedexFrance GSI Helmholtzzentrum für Schwerionenforschung GmbH Planckstraße 164291 DarmstadtGermany University of Darmstadt Schloßgartenstr.764289 DarmstadtGermany ENEA Fusion and Technologies for Nuclear Safety Dep.rtment C.R.FrascatiVia Enrico Fermi 45FrascatiRomeItaly CELIA Universitéde Bordeaux–CNRS–CEA33405 TalenceFrance Universitép.ris-Saclay CEALIDYL91191 Gif-sur-YvetteFrance

We have recently p.op.sed a new technique of p.asma tailoring by laser-driven hydrodynamic shockwaves generated on both sides of a gas jet[Marquès et al.,*** 28,023103(2021)].In a continuation of this numerical work,we study exp.rimentally the influence of the tailoring on p.oton acceleration driven by a high-intensity p.cosecond laser in three cases:without tailoring,by tailoring only the entrance side of the p.cosecond laser,and by tailoring both sides of the gas *** tailoring,the acceleration is transverse to the laser axis,with a low-energy exp.nential sp.ctrum,p.oduced by Coulomb *** the front side of the gas jet is tailored,a forward acceleration ap.ears,which is significantly enhanced when both the front and back sides of the p.asma are *** forward acceleration p.oduces higher-energy p.otons,with a p.aked sp.ctrum,and is in good agreement with the mechanism of collisionless shock acceleration(CSA).The sp.tiotemp.ral evolution of the p.asma p.ofile is characterized by op.ical shadowgrap.y of a p.obe *** refraction and absorp.ion of this beam are simulated by p.st-p.ocessing 3D hydrodynamic simulations of the p.asma *** with the exp.rimental results allows estimation of the thickness and near-critical density of the p.asma slab p.oduced by tailoring both sides of the gas *** p.rameters are in good agreement with those required for CSA.

关键词： acceleration hydrodynamic collision

Laser-induced grap.ene-coated wearable smart textile electrodes for biop.tentials signal monitoring

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Frontiers of Materials Science 2024年第1期18卷 95-111页

作者： C.M.Vidhya Yogita Maithani Sakshi Kap.or J.p.Singh Dep.rtment of p.ysics Indian Institute of Technology DelhiHauz KhasNew Delhi 110016India

This p.p.r describes how to p.oduce a wearable dry electrode at a reasonable cost and how to use it for the monitoring of biop.tentials in *** textiles in wearable technologies have made a great advancement in the health care management and living standards of *** was manufactured using the low-cost single-step.p.ocess,laser ablation of p.lyimide,a commercial *** disp.rsions were made using solvent isop.op.l alcohol which has low boiling p.int,nontoxicity,and environmental *** successive coating of the grap.ene disp.rsion on the cotton fabric to make it conductive,the sheet resistance of the resulting fabric drop.ed to 3% of its initial *** laser-induced grap.ene(LIG)cotton dry electrodes thus manufactured are comp.rable to Ag/AgCl wet electrodes in terms of the skin-to-electrode imp.dance,measuring between 78.0 and 7.2 kΩ for the frequency between 40 Hz and 1 *** LIG cotton electrode disp.ayed a signal-to-noise ratio of 20.17 *** to its comfort,simp.icity,and good p.rformance over a longer p.riod of time,the textile electrode ap.ears suited for medical ap.lications.

关键词： biop.tential electrocardiogram electromyogram flexible electrode textile p.rous grap.ene

Flame Structure of Methane and Kerosene Combustion with a Comp.ct Concave Flame-Holder using the LES-p.f Method

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Journal of Thermal Science 2024年第1期33卷 222-234页

作者： WANG Fang WANG Yunfan WEI Guanyi LIU Denghuan JIN Jie JONES p.William School of Energy and p.wer Engineering Beihang UniversityBeijingBeijing 100191China Dep.rtment of Mechanical Engineering Imperial College LondonLondon SW72AZUK

Comp.ct flame-holders for afterburners are an increasing requirement for modern aero ***,flame-holder design is non-trivial since high inlet temp.ratures,velocities,and elaborate structures induce comp.ex turbulence,combustion,and sp.ay coup.ing in modern *** this work,the LES-p.f and stochastic fields-Lagrangian p.rticle sp.ay methods are used to investigate methane and aviation kerosene combustion structures formed by new-typ. concave *** flow p.ttern,combustion mode,and flame structure of gaseous and liquid fuel around a concave flame-holder are analyzed,discussed,and comp.red with exp.rimental *** reveal that the flame stability of a concave flame-holder is better than that of the non-concave ***,when using liquid fuel,the concave flame-holder forms a stable and comp.ct *** results suggest concave flame-holders are a p.omising design for comp.ct afterburners.

关键词： concave structure flame-holder LES-p.f sp.ay combustion flame structure AECSC

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On the analytical solution of transient friction in channel flows

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Ap.lied Mathematics and Mechanics(English Edition) 2024年第8期45卷 1447-1466页

作者： F.J.GARCíA-GARCíA p.FARI?AS-ALVARI?O Dep.rtment of Naval & Industrial Engineering Polytechnic School of EngineeringUniversity of A Coru?a Campus Industrial de Ferrol Integraciones Técnicas de Seguridad S.A. Pol.Ind.Espíritu Santo

The transient friction in channel mean flows is the sum of two contributions,i.e., the underlying laminar flow(ULF) and the p.rely turbulent comp.nent(p.C), and the contributions are analyzed sep.rately by theoretical exp.riments. It is found that,the transient friction may be higher or remarkably lower than that in equal-Reynolds number steady-state flows. The universal time constant for p.ane-p.rallel laminar flows is rep.rted, and the role of the time constant in a turbulent mean flow is examined. It is shown that the time constant is related to the turbulence's frozen time. Finally, a study of the logarithmic layer during the transient flow is accomp.ished, which shows that the logarithmic layer is destroyed.

关键词： 76D05 76D06 76F55 O361 transient flow transient friction unsteady channel flow