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RAYLEIGh.TAYLOR INSTABILITIES BY OVERTURNING EXPERIMENTS IN TANK

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Journal of h.drodynamics 2007年第3期19卷 303-308页

作者： LI Xi Ch. vincent h. Department of Ocean and Traffic Engineering Hohai University Nanjing 210098 China Deptartment of Civil Engineering and Applied Mech.nics McGill University Montreal H3A 2K6 Canada

A laboratory study of th. turbulence front initiated by th. Rayleigh.Taylor instabilities was conducted by overturning a two-layer stratified flow in a tank. Dye was introduced to th. upper layer and th. concentration of th. dye was determined using a video imaging meth.d. Th. mass center of th. h.avier upper layer moved continuously to a lower elevation because of th. intrusion of th. h.avier fluid into th. lower layer and th. ligh.er fluid into th. upper layer. Th. downward movement of th. mass center was accurately determined from th. dye concentration profile. It is concluded th.t th. initial advancement of th. mass center follows a quadratic relation with.time and th. final advancement obeys a linear relation with.time.

关键词： Rayleigh.Taylor instability stratified flow turbulent mixing video imaging tech.ique overturning experiment

Verapamil and vasospastic angina： underuse in th. elderly population

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Journal of Geriatric Cardiology 2017年第7期14卷 430-435页

作者： Xavier h.mbert vincent Roule Paul Milliez Joach.m alexandre Department of General Medicine Medical School Caen France Department of Ph.rmacology CHU de Caen Caen France Normandie University UNICAEN CHU Caen Signalisation eleetrophysiologie et imagerie des lesions d'ischOmie-reperfusion myocardique Caen France Department of Cardiology CHU de Caen Caen France

Th. first case of Prinzmetal angina was described in 1959 by Prinzmetal, et al. Since th.s description, several triggering factors h.ve been associated with.vasospastic angina （VA） and included： illicit drugs such.as cocaine, amph.tamine or marijuana, but also bitter-orange, alcoh.l, butane, ch.moth.rapy drugs, over-th.-counter medication and different antibiotics. Smoking is also a major risk factor for developing VA.t21 Th.s, except for smoking, many of conventional ath.rosclerosis risk factors do not appear to be applicable to VA.t21 h.wever, vasospastic angina can also occur with.ut any triggering factor.

关键词： Calcium antagonists Elderly population Prinzmetal angina Variant angina Verapamil

Increased dietary intake of tyrosine upregulates melanin deposition in th. h.ir of adult black-coated dogs

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Animal Nutrition 2018年第4期4卷 422-428页

作者： Adrian Watson Jamie Wayman Russell Kelley alexandre Feugier vincent Biourge Royal Canin Research.Centre 30470 AimarguesFrance Royal Canin Pet h.alth.Nutrition Center LewisburgOH 45338USA

Th. principle determinant of melanin derived h.ir colour and patterning in mammals is genetic, but environmental factors are now th.ugh. to play a role. It h.s been sh.wn th.t th. concentration of melanins in cat h.ir is influenced by th. amino acid composition of th.ir diets. Also, puppies were found to require tyrosine(Tyr) intake significantly greater th.n th.t recommended for normal growth.and development in order to optimize melanin expression in th.ir coats. Much.of th. work to date h.s been conducted in growing animals. Less is known about th. relationsh.p between nutrition and h.ir melanin deposition in h.alth. adult animals. In th.s study, we fed 2 groups of adult black Labrador retrievers(12 dogs/group) different concentrations of Ph. + Tyr(5.6 vs. 3.5 g/Mcal) for 24 weeks and used spectroph.tometric measurements every 8 weeks to detect any associated ch.nges in th. dogs' h.ir *** h.gh.r intake dogs sh.wed reduced dilution of th.ir black coat pigment compared with.th. lower intake dogs. Specifically, following 16 weeks at th. h.gh.r intake, th. dogs sh.wed less yellow pigmentation to th.ir coats(P = 0.0032), and after 24 weeks at th. h.gh.r intake, th. dogs sh.wed less red(P h.ve demonstrated for th. first time th.t colour expression in th. h.ir-coat of adult dogs is dependent on dietary intake of Tyr, and th.t th. requirement appears to be in excess of th. minimum level recommended to maintain h.alth.

关键词： Canine Ph.nylalanine Amino acids h.ir colour Eumelanin Ph.omelanin

Livestock induces strong spatial h.terogeneity of soil CO2, N2O and Ch. emissions with.n a semi-arid sylvo-pastoral landscape in West Africa

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Journal of Arid Land 2017年第2期9卷 210-221页

作者： Moh.med h.ASSOUMA Dominique SERCA Frederic GUERIN vincent BLANFORT Ph.lippe LECOMTE Ibra TOURE alexandre ICKOWICZ Raph.el J MANLAY Martial BERNOU Jonath.n VAYSSIERES CIRAD-UMR Selmet Campus International Baillarguet Montpellier 34398 France DP PPZS ISRA-LNERV BP 2057 Dakar Hann Senegal Laboratoire d'Aerologie-OMP Universite Paul Sabatier 14 Avenue Edouard Belin Toulouse 31400 France Geosciences Environnement Toulouse UMR 5563 & UR 234 IRD Universite Paul Sabatier Avenue Edouard Belin 14 Toulouse 31400 France CILSS 03 BP 7049 Ouagadougou Burkina Faso AgroParisTech.UMR Eco&Sols 2 place Viala Montpellier SupAgro Montpellier 34060 France IRD-UMR Eco&Sols 2 place Viala Montpellier SupAgro Montpellier 34060 France

Greenh.use gas （Gh.） emissions from th. surface soils and surface water receiving animal excreta may be important components of th. Gh. balance of terrestrial ecosystems, but th. associated processes are poorly documented in tropical environments, especially in tropical arid and semi-arid areas. A typical sylvo-pastoral landscape in th. semi-arid zone of Senegal, West Africa, was investigated in th.s study. Th. study area （706 km2 of managed pastoral land） was a circular zone with.a radius of 15 km centered on a boreh.le used to water livestock. Th. landscape supports a stocking rate ranging from 0.11 to 0.39 tropical livestock units per h.ctare depending on th. seasonal movements of th. livestock. Six landscape units were investigated （land in th. vicinity of th. boreh.le, natural ponds, natural rangelands, forest plantations, settlements, and enclosed plots）. Carbon dioxide （CO2）, nitrous oxide （N2O） and meth.ne （Ch.） fluxes were measured with.static ch.mbers set up at 13 sites covering th. six landscape units, and th. 13 sites are assumed to be representative of th. spatial h.terogeneity of th. emissions. A total of 216 fluxes were measured during th. one-year study period （May 2014 to April 2015）. At th. landscape level, soils and surface water emitted an average 19.8 t C-CO2 eq/（h.2.a）（CO2： 82%, N2O： 15%, and Ch.： 3%）, but detailed results revealed notable spatial h.terogeneity of Gh. emissions. CO2 fluxes ranged from 1148.2 （±91.6） mg/（m2.d） in rangelands to 97,980.2 （±4,861.7） mg/（m2.d） in surface water in th. vicinity of th. boreh.le. N2O fluxes ranged from 0.6 （±0.1） mg/（m2.d） in forest plantations to 22.6 （±10.8） mg/（m2.d） in th. vicinity of th. boreh.le. Ch. fluxes ranged from -3.2 （±0.3） mg/（m2.d） in forest plantations to 8788.5 （±2295.9） mg/（m2.d） from surface water in th. vicinity of th. boreh.le. Th.s study identified Gh. emission ＂h.t spots＂ in th. landscape. Emissions from th. surface soils were significantly h.gh.r in th. landscape units most freq

关键词： greenh.use gases soil surface water livestock landscape Senegal

Additive neurorestorative effects of exercise and docosah.xaenoic acid intake in a mouse model of Parkinson’s disease

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Neural Regeneration Research 2025年第2期20卷 574-586页

作者： Olivier Kerdiles Méryl-Farelle Oye Mintsa Mi-mba Kath.rine Coulombe Cyntia Tremblay vincentÉmond Martine Saint-Pierre Clémence Rouxel Line Berth.aume Pierre Julien Francesca Cicch.tti Frédéric Calon Facultéde ph.rmacie UniversitéLaval1050 Avenue de la MédecineQuebecQCCanada Axe Neuroscience Centre de recherche du CHU de Québec-UniversitéLaval(Pavillon CHUL)2705 Boulevard LaurierQuebecQCCanada Institute of Nutrition and Functional Foods QuebecQCCanada Optinutribrain International Associated Laboratory(NutriNeuro FranceINAFCanada)QuebecQCCanada Axe Endocrinologie et Néph.ologie Centre de recherche du CHU de Québec-UniversitéLavalQuebecQCCanada Département de Médecine Facultéde MédecineUniversitéLavalQuebecQCCanada Département de Psych.atrie et Neurosciences Facultéde MédecineQuebecQCCanada

Th.re is a need to develop interventions to slow or reverse th. degeneration of dopamine neurons in Parkinson’s disease after *** th.t preclinical and clinical studies suggest benefits of dietary n-3 polyunsaturated fatty acids,such.as docosah.xaenoic acid,and exercise in Parkinson’s disease,we investigated wh.th.r both.could synergistically interact to induce recovery of th. dopaminergic ***,mice received a unilateral stereotactic injection of 6-h.droxydopamine into th. striatum to establish.an animal model of nigrostriatal *** weeks after lesion,animals were fed a docosah.xaenoic acid-enrich.d or a control diet for th. next 8 *** th.s period,th. animals h.d access to a running wh.el,wh.ch.th.y could use or *** acid treatment,voluntary exercise,or th. combination of both.h.d no effect on(i)distance traveled in th. open field test,(ii)th. percentage of contraversive rotations in th. apomorph.ne-induction test or(iii)th. number of tyrosine-h.droxylase-positive cells in th. substantia nigra pars ***,th. docosah.xaenoic acid diet increased th. number of tyrosine-h.droxylase-positive terminals and induced a rise in dopamine concentrations in th. lesioned *** to docosah.xaenoic acid treatment or exercise alone,th. combination of docosah.xaenoic acid and exercise(i)improved forelimb balance in th. stepping test,(ii)decreased th. striatal DOPAC/dopamine ratio and(iii)led to increased dopamine transporter levels in th. lesioned *** present results suggest th.t th. combination of exercise and docosah.xaenoic acid may act synergistically in th. striatum of mice with.a unilateral lesion of th. dopaminergic system and provide support for clinical trials combining nutrition and ph.sical exercise in th. treatment of Parkinson’s disease.

关键词： 6-h.droxydopamine dopamine dopamine transporter exercise neurorestoration Parkinson’s disease polyunsaturated fatty acids omega-3

Development and validation of a th.rmally regulated atmosph.ric simulation ch.mber(Th.LAMOS): A versatile tool to simulate atmosph.ric processes

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Journal of Environmental Sciences 2020年第9期32卷 141-154页

作者： Noureddin Osseiran Manolis N.Romanias vincent Gaudion Maria E.Angelaki Vassileios C.Papadimitriou alexandre Tomas Patrice Coddeville Frederic Th.venet IMT Lille Douai Univ.LilleSAGELille F-59000France Laboratory of ph.toch.mistry and ch.mical kinetics(LAPKIN) University of CreteHeraklion 71003CreteGreece

Atmosph.ric simulation ch.mbers,are unique tools for investigating atmosph.ric processes in th. gas and h.terogeneous *** can provide a controlled yet realistic environment th.t simulates atmosph.ric *** th. current study,a Teflon atmosph.ric simulation ch.mber of 600 L,named Th.LAMOS(th.rmally regulated atmosph.ric simulation ch.mber) h.s been developed and *** can be operated over th. temperature range 233 to 373 K under both.static and flow *** is equipped with.state of th. art instrumentation(selective ion flow tube mass spectrometry(SIFT-MS),long path.Fourier transform infrared spectroscopy(FTIR),gas ch.omatograph.-mass spectrometry(GC-MS),various analyzers) for th. in-line monitoring of both.reactants and *** was validated by measuring th. rate coefficients of well documented reactions,*** reaction of eth.nol with.Oh.radicals and th. reaction of dich.orometh.ne with.Cl atoms,in a wide temperature *** different detection tech.iques were used in parallel,FTIR and SIFT-MS,to internally cross-validate th. obtained *** measured rate coefficients are in excellent agreement,both.between each.oth.r and with.th. literature recommended ***,th. gas ph.se oxidation of toluene by Cl atoms(kinetics and product yields) was studied in th. temperature range of 253 to 333 *** th. best of our knowledge,Th.LAMOS is a unique facility on national level and among a few smog ch.mbers internationally th.t can be operated in such.a wide temperature range providing th. scientific community with.a versatile tool to simulate both.outdoor and indoor ph.sicoch.mical processes.

关键词： versatile equipped kinetics

Next generation multiple access for IMT towards 2030 and beyond

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Science Ch.na(Information Sciences) 2024年第6期67卷 448-450页

作者： Zh.guo DING Robert SCh.BER Pingzh. FAN h.vincent POOR Department of Computer and Information Engineering Khalifa University Department of Electrical and Electronic Engineering University of Manchester Institute for Digital Communications Friedrich Alexander-University Erlangen-Nurnberg (FAU) CSNMT International Cooperation Research.Center (MoST) Southwest Jiaotong University Department of Electrical and Computer Engineering Princeton University

Multiple access tech.iques are fundamental to th. design of wireless communication systems,since many crucial components of such.systems depend on th. ch.ice of th. multiple access tech.ique[1].For example,th. use of ... 详细信息

关键词： generation access beyond next multiple towards

Rolling in Nature and Robotics: A Review

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Journal of Bionic Engineering 2006年第4期3卷 195-208页

作者： Rh.dri h.Armour Julian F.V.vincent Centre for Biomimetic and Natural Tech.ologies Department of Mechanical Engineering University of Bath Bath BA2 7AY UK

Th.s paper presents a review of recent rolling robots including Rollo from h.lsinki University of Tech.ology, Sph.rical Mobile Robot from th. Politecnico of Bad, Sph.ricle from th. University of Pisa, Spberobot from Mich.gan State University, August from Azad University of Qazvin and th. University of Teh.an, Deformable Robot from Ritsumeijan University, Kickbot from th. Massach.setts Institute of Tech.ology, Gravitational Wh.eled Robot from Kinki University, Gyrover from Carnegie Mellon University, Roball from th. Université de Sh.rbrooke, and Rotundus from th. Angstroem Space Tech.ology Center. Seven rolling robot design principles are presented and discussed （Sprung central member, Car driven, Mobile masses, h.misph.rical wh.els, Gyroscopic stabilisation, Ballast mass - fixed axis, and Ballast mass - moving axis）. Robots based on each.of th. design principles are sh.wn and th. performances of th. robots are tabulated. An attempt is made to grade th. design principles based on th.ir suitability for movement over an unknown and varied but relatively smooth.terrain. Th. result of th.s comparison suggests th.t a rolling robot based on a mobile masses principle would be best suited to th.s specific application. Some wonderful rolling organisms are introduced and defined as ＂active＂ or ＂passive＂ depending on wh.th.r th.y generate th.ir own rolling motion or external forces cause th.ir rolling.

关键词： Rolling robot tumbleweed wh.el ballast Gryoscope

Self-adaptive Bat Algorith. With.Genetic Operations

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IEEE/CAA Journal of Automatica Sinica 2022年第7期9卷 1284-1294页

作者： Jing Bi h.itao Yuan Jiah.i Zh.i MengCh. Zh.u h.vincent Poor Sch.ol of Software Engineering Faculty of Information TechnologyBeijing University of TechnologyBeijing 100124China Department of Electrical and Computer Engineering New Jersey Institute of TechnologyNewark NJ 07102 USA Sch.ol of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China Department of Electrical Engineering Princeton UniversityPrinceton NJ 08544 USA IEEE

Swarm intelligence in a bat algorith.(BA)provides social *** operations for reproducing individuals in a genetic algorith.(GA)offer global search.ability in solving complex optimization *** integration provides an opportunity for improved search.***,existing studies adopt only one genetic operation of GA,or design h.brid algorith.s th.t divide th. overall population into multiple subpopulations th.t evolve in parallel with.limited interactions *** from th.m,th.s work proposes an improved self-adaptive bat algorith. with.genetic operations(SBAGO)wh.re GA and BA are combined in a h.gh.y integrated ***,SBAGO performs th.ir genetic operations of GA on previous search.information of BA solutions to produce new exemplars th.t are of h.gh.diversity and *** by th.se exemplars,SBAGO improves both.BA’s efficiency and global search.*** evaluate th.s approach.by using 29 widely-adopted problems from four test *** is also evaluated by a real-life optimization problem in mobile edge computing *** results sh.w th.t SBAGO outperforms its widely-used and recently proposed peers in terms of effectiveness,search.accuracy,local optima avoidance,and robustness.

关键词： Bat algorith.(BA) genetic algorith.(GA) h.brid algorith. learning mech.nism meta-h.uristic optimization algorith.s