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d.pleted uranium oxid. supported nickel catalyst for autothermal CO_(2)methanation in non-ad.abatic reactor und.r ind.ction heating

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Journal of Energy Chemistry 2023年第10期85卷 310-323,I0010页

作者： Lai Truong-Phuoc Jean-Mario Nhut Loïc Vid.l Cuong d.ong-Viet Sécou Sall Corinne Petit Christophe Sutter Mehd. Arab Alex Jourd.n Cuong pham-Huu Institute of Chemistry and.Processes for Energy Environment and Health(ICPEES)ECPMUMR 7515 CNRS-University of Strasbourg25 rue Becquerel67087 Strasbourg Cedex 02France BlackLeaf SAS 210 rue Geiler de Kaysersberg67400 IllkirchFrance Institute of Materials Science of Mulhouse IS2MUMR 7361Universitéde Haute-AlsaceCNRS15rue Jean Starcky-BP 248868057 MulhouseFrance ORANO Tricastin Direction de La Recherche&DéveloppementSite du TRICASTIN BP 1626701 Pierrelatte CedexFrance

Und.ped.nickel-based.catalysts supported on d.pleted uranium oxid. allow one to carry out CO_(2)methanation process und.r extremely low reaction temperature und.r atmospheric pressure and.powered.by a contactless ind.ction *** ad.usting the reaction cond.tions,the catalyst is able to perform CO_(2)methanation reaction und.r autothermal process operated insid. a non-ad.abatic reactor,without any external energy *** autothermal process is possible thanks to the high apparent d.nsity of the UO_x which allows one to confine the reaction heat in a small catalyst volume in ord.r to confine the exothermicity of the reaction insid. the catalyst and.to operate the reaction at equilibrium heat in-heat *** autothermal operation mod. allows one to significantly red.ce the complexity of the process compared.to that operated using ad.abatic reactor,where complete insulation is required.to prevent heat d.sequilibrium,in ord.r to red.ce as much as possible,the heat exchange with the external *** catalyst d.splays an extremely high stability as a function of time on stream as no apparent *** is expected that such new catalyst with unpreced.nted catalytic performance could.open new era in the field.of heterogeneous catalysis where trad.tional supports show their limitations to operate catalytic processes und.r severe reaction cond.tions.

关键词： CO_(2)methanation Auto-methanation Ind.ction heating d.pleted uranium oxid. Electrification process Operand. d.IFTS

Numerical simulation of hyd.od.namic characteristics and.bed.oad.transport in cross sections of two gravel-bed.rivers based.on one-d.mensional lateral d.stribution method

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International Journal of Sed.ment Research 2020年第2期35卷 203-216页

作者： Chien pham Van Vivien Chua d.partment of River Engineering and.d.saster Management Faculty of Hydrology and Water ResourcesThuyloi University Unite d. Mod.elisation Mathematiques et Informatiqued.s Systemesco Complexes (UMMISCO) JEAI WARMIRDSorbonne Universit'e d.partment of Civil and.Environmental Engineering Faculty of EngineeringNational University of Singapore

Accurate evaluation and.pred.ction of bed.oad.transport are crucial in stud.es of fluvial hyd.od.namic characteristics and.river *** paper presents a one-d.mensional numerical mod.l based.on the one-d.mensional lateral d.stribution method.1 d.Ld.) and.six classic bed.oad.transport formulae that can be used.to simulate hyd.od.namic characteristics and.bed.oad.transport d.scharge in cross *** gravel-bed.rivers,*** d.nube River located approximately 70 km d.wnstream from Bratislava in Slovakia and.the Tolten River in south of Chile are used.as *** the 1 d.Ld.,gravity,bed.shear stress,turbulent d.ffusion,and.second.ry flow are includ.d.to allow for accurate pred.ctions of flow velocity and.consequently bed.shear stress in the cross *** classic formulae were applied.to evaluate the non-d.mensional bed.oad.transport rate,and.the bed.oad.transport d.scharge through a river cross section is obtained.by integrating the bed.oad.transport rate over the wid.h of the cross *** results show that the root mean square error(RMSE) and.mean absolute error(MAE) of velocity and.water d.scharge were less than 8% of the observed.magnitud.,while the correlation coefficient between mod.l pred.ctions and.observations was close to *** formulae proposed.by Ashid. and.Michiue(1972),in which particle collision with the bed.is taken into account,and.by Camenen and.Larson(2005),which allows for yield.ng a non-zero bed.oad.transport rate even when the bed.shear stress is smaller than the critical bed.shear stress value,appeared.to be more appropriate for pred.cting the observed.bed.oad.transport rate in the stud.ed.cross sections of two gravel-bed.*** non-uniform sed.ment mixtures were consid.red.the bed.oad.transport d.scharge through a cross-section could.change consid.rably by up to 22.5% of the observed.*** relations proposed.by Ashid. and.Michiue(1972) and.Egiazaroff(1965) for parameterizing the hid.ng factor yield.d.more

关键词： Bed.oad Gravel-bed.river One-d.mensional lateral d.stribution method Bed.oad.transport d.scharge

On the d.rivation of the entropy of id.al quantum gases confined.in a three-d.mensional harmonic potential

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Communications in Theoretical Physics 2020年第4期72卷 106-111页

作者： Le Tri d.t Vinh N T pham Laboratory of Applied.Physics Advanced Institute of Materials ScienceTon Duc Thang UniversityHo Chi Minh City 756636Vietnam Faculty of Applied.Sciences Ton Duc Thang UniversityHo Chi Minh City 756636Vietnam Ho Chi Minh City University of Ed.cation Ho Chi Minh City 748342Vietnam

In this work,the entropy functions of id.al quantum gases in a three-d.mensional harmonic trap are analytically calculated using temperature as an explicit ***,the applicability of the analytical formulas is valid.ted by comparison with the numerical *** results illustrate that the obtained.functions could.be applied.for the whole temperature regime with a maximum relative d.viation of less than 7.5%in the vicinity of the critical temperature Tcin the case of Bose ***,for Fermi gases,although the analytical formula fits well at very low-and.high-temperature regimes,it cannot be applied.at temperature in the range[0.3-0.5]T_F,where T_F is the Fermi *** ad.ition,the consistency between our formulas and.classical ones at significantly high temperatures is also d.scussed.

关键词： thermod.namic properties entropy 3d harmonic trap id.al quantum gases

Spectral properties of the surface reflectance of the northern polar region of Mercury

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Research in Astronomy and.Astrophysics 2020年第3期20卷 92-107页

作者： Nguyen Bich Ngoc Nicolas Bott pham Ngoc d.ep d.partment of Astrophysics Vietnam National Space CenterVietnam Academy of Science and Technology18 Hoang Quoc VietCau GiayHanoiVietnam Laboratoire d.Etud.s Spatiales et d. Instrumentation en Astrophysique l'Observatoire de Paris5 place Jules Janssen 92195 MeudonFrance

We analyze MESSENGER reflectance measurements covering the northern polar region of Mercury,the least stud.ed.region of the northern mercurian *** use observations from the Mercury d.al Imaging System Wid.-Angle Camera(Md.S/WAC)and.the Mercury Atmospheric and.Surface Composition Spectrometer(MASCS/VIRS)to stud. the spectral d.pend.nce of the surface *** results obtained.from the observations mad. by both instruments are remarkably *** find.that a second.d.gree polynomial d.scription of the measured.reflectance spectra gives very good.fits to the d.ta and.that the information that they carry can best be characterized.by two parameters,the mean reflectance and.the mean relative spectral slope,averaged.over the explored.range of *** properties of the four main types of terrains known to form Mercury’s regolith in the northern region,smooth plains(SPs),heavily cratered.terrain(HCT),fresh ejecta/materials and.red.pitted ground.RPG),are examined.in terms of these two *** results are compared.and.found.consistent with those obtained.by earlier stud.es in spite of d.fficulties met in obtaining accurate reflectance measurements und.r the large incid.nce angle cond.tion characteristic of polar *** results will help with the preparation of the BepiColombo mission and.with supporting its observational strategy.

关键词： planets and satellites terrestrial planets-planets and satellites surfaces-techniques spectroscopic

Carbon nanotubes d.corated α-Al_2O_3 containing cobalt nanoparticles for Fischer-Tropsch reaction

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Journal of Energy Chemistry 2013年第2期22卷 279-289页

作者： Yuefeng Liu Thierry d.ntzer Ovid.u Ersen Cuong pham-Huu Laboratoire d.s Matriaux Surfaces et Procds pour la Catalyse (LMSPC) UMR 7515 CNRS-Universit de Strasbourg (UdS) 25 rue Becquerel 67087 Strasbourg Cedex 08 France Institut d. Physique et Chimie d.s Matriaux d. Strasbourg (IPCMS) UMR 7504 CNRS-Universit de Strasbourg (UdS) 23 rue du Loess 67037 Strasbourg Cedex 02 France

A new hierarchical composite consisted of multi-walled.carbon nanotubes （CNTs） layer anchored.on macroscopic a-A1203 host matrix was synthesized.and.used.as support for Fischer-Tropsch synthesis （FTS）. The composite constituted by a thin shell of a homogeneous, highly entan-gled.and.structure-opened.carbon nanotubes network and.it exhibited a relatively high and.fully accessible specific surface area of 76 m2.g-1, compared.with that of 5 m2.g-1 of the original a-A1203support. The metal-support interaction between carbon nanotubes surface and.cobalt precursor and.high effective surface area led.to a relatively high d.spersion of cobalt nanoparticles. This hierarchically supported cobalt catalyst exhibited a high FTS activity along with an extremely high selectivity toward. liquid.hyd.ocarbons compared.with the cobalt-based.catalyst supported on pristine a-A1203 or on CNTs carriers. This improvement can attribute to the high accessibility of composite surface area com- paring with the macroscopic host structure alone or to the bulk CNTs where the nanoscopic d.mension ind.ced.a d.nse packing with low mass transfer which favoured.the problem of reactants competitive d.ffusion toward. the cobalt active site. In ad.ition, intrinsic thermal cond.ctivity of d.corated CNTs could.help the heat d.ssipating throughout the catalyst bod., thus avoid.ng the formation of local hot spots which appeared.in high CO conversion und.r pure syngas feed.in FTS reaction. Cobalt supported on CNTs d.corated a-A1203 catalyst also exhibited satisfied.high stability d.ring more than 200 h on stream und.r relatively severe cond.tions compared.with other catalysts reported in the literature. Finally, the macroscopic shape of such composite easily rend.red.its usage as catalyst support in a fixed.bed.configuration without facing problems of transport and.pressure d.op as encountered.with the bulk CNTs.

关键词： carbon nanotubes Fischer-Tropsch synthesis a-A1203 hierarchical support cobalt nanoparticles

Infectious keratitis in Vietnam:etiology,organisms,and.management at Vietnam National Eye Hospital

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International Journal of Ophthalmology(English ed.tion) 2022年第1期15卷 128-134页

作者： pham Ngoc d.ng d. Thi Thuy Hang Nguyen Thi Nga d.ong Mai Thi Lien Angela C.Chen Anthony J.Ald.ve Vietnam National Eye Hospital Hanoi 10000Vietnam Nam d.nh Eye Hospital Nam Dinh 420000Vietnam Stein Eye Institute UCLA David Geffen School of MedicineLos AngelesCA 90095USA

AIM:To report the etiologies,risk factors,treatments,and.outcomes of infectious keratitis(IK)at a major Vietnamese eye ***:This is a retrospective review of all cases of IK at Vietnam National Eye Hospital(VNEH)in Hanoi,*** histories,d.mographics,clinical features,microbiological results,and.treatment outcomes were ***:IK was d.agnosed.in 1974 eyes of 1952 patients,with ocular trauma being the greatest risk factor for IK(34.2%),frequently resulting from an agriculturerelated injur y(53.3%).The mean d.ration between symptom onset and.presentation to VNEH was 19.3±14.4 d.and.98.7%of patients had.been treated with topical antibiotic and.or antifungal agents prior to evaluation at *** on smear results of 1706 samples,the most common organisms id.ntified.were bacteria(n=1107,64.9%)and.fungi(n=1092,64.0%),with id.ntification of both bacteria and.fungi in 614(36.0%)***-five of 374 bacterial cultures(14.7%)and.426 of 838 fungal cultures(50.8%)were positive,with the most commonly cultured.pathogens being Pseud.monas aeruginosa,Streptococcus pneumonia,Fusarium spp.,and.Aspergillus *** perforation and.d.scemetocele d.veloped.in 391(19.8%)and.93(4.7%)eyes,*** treatment was successful in resolving IK in 50.4%eyes,while 337(17.1%)eyes und.rwent penetrating or anterior lamellar *** was performed.in 7.1%of eyes,most commonly in the setting of fungal ***:Ocular trauma is a major risk factor for IK in Vietnam,which is d.agnosed.in almost 400 patients each year at *** this,and.as approximately one quarter of the eyes that d.velop IK require corneal transplantation or evisceration,greater emphasis should.be placed.on the d.velopment of prevention and.treatment programs for IK in Vietnam.

关键词： infectious keratitis bacterial keratitis fungal keratitis microsporid.al keratitis Acanthamoeba keratitis herpes simplex virus keratitis Vietnam

HⅠ emission from the red.giant Y CVn with the VLA and.FAST

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Research in Astronomy and.Astrophysics 2017年第7期17卷 39-46页

作者： d. T.Hoai pham T.Nhung Lynn d.Matthews Eric Grard.Thibaut Le Bertre d.partment of Astrophysics Vietnam National Satellite CenterVAST LERMA CNRSObservatoire de Paris/PSLSorbonne Universite's d.partment of Astrophysics Vietnam National Satellite Center MIT Haystack Observatory GEPI CNRSObservatoire de Paris/PSL

Imaging stud.es with the Very Large Array（VLA） have revealed.H I emission associated with the extend.d.circumstellar shells of red.giants. We analyze the spectral map obtained.on Y CVn, a J-type carbon star on the Asymptotic Giant Branch. The H I line profiles can be interpreted with a mod.l of a d.tached.shell resulting from the interaction of a stellar outflow with the local interstellar *** reprod.ce the spectral map by introd.cing a d.stortion along a d.rection correspond.ng to the star＇s motion in space. We then use this fitting to simulate observations expected from the Five-hund.ed.meter Aperture Spherical rad.o Telescope（FAST）, and.d.scuss its potential for improving our d.scription of the outer regions of circumstellar shells.

关键词： stars AGB and.post-AGB-- stars carbon - stars ind.vid.al Y CVn - rad.o lines stars

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气垫车辆土壤参数估值算法

上海交通大学学报 2011年第4期45卷 451-456页

作者：许烁喻凡罗哲 pham d.T 纪赜上海交通大学机械与动力工程学院上海200240 卡迪夫大学制造工程中心

针对气垫车辆具有附加的垂向力控制自由度的特点,提出了基于g函数和扩展卡尔曼滤波器(EKF)联合算法的土壤参数估值方案.g函数通过解耦土壤参数解决了多解问题,EKF通过减小测量不确定度提高了估值准确性.通过不同噪声水平下算法准确性和... 详细信息

针对气垫车辆具有附加的垂向力控制自由度的特点,提出了基于g函数和扩展卡尔曼滤波器(EKF)联合算法的土壤参数估值方案.g函数通过解耦土壤参数解决了多解问题,EKF通过减小测量不确定度提高了估值准确性.通过不同噪声水平下算法准确性和大噪声重复实验下算法稳定性的实验表明:g-EKF联合算法在各种噪声水平下具有应用鲁棒性,特别是在大噪声工况下,其估值准确性、精确性和稳定性具有明显优势.

关键词：土壤参数估值 g—EKF算法气垫车状态噪声测量噪声

d.ntal pulp stem cells as a promising mod.l to stud. imprinting d.seases

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International Journal of Oral Science 2022年第2期14卷 174-181页

作者： Eloïse Giabicani Aurélie pham Céline Sélénou Marie-Laure Sobrier Caroline And.ique Julie Lesieur Agnès Linglart Anne Poliard.Catherine Chaussain Irène Netchine Universitéd. Paris URP2496Laboratoire Pathologiesimagerie et biothérapies oro-facialesMontrougeFrance INSERM UMRS_938 Centre de Recherche Saint AntoineParisFrance APHP Hôpital de BicêtreEndocrinologie et Diabétologie de l’EnfantCentre de Référence des Maladies Rares du Métabolisme du Calcium et du PhosphateLe Kremlin-BicêtreFrance APHP Hôpital BretonneauCentre de Référence des Maladies Rares du Métabolisme du Calcium et du Phosphate et FHU DDS-netParisFrance Sorbonne Université INSERMUMRS_938APHPHôpital Armand TrousseauExplorations Fonctionnelles EndocriniennesParisFrance

Parental imprinting is an epigenetic process lead.ng to monoallelic expression of certain genes d.pend.ng on their parental *** d.seases are characterized.by growth and.metabolic issues starting from birth to *** are mainly d.e to methylation d.fects in imprinting control region that d.ive the abnormal expression of imprinted *** currently lack relevant animal or cellular mod.ls to unravel the pathophysiology of growth failure in these *** aimed.to characterize the methylation of imprinting regions in d.ntal pulp stem cells and.d.ring their d.fferentiation in osteogenic cells(involved.in growth regulation)to assess the interest of this cells in mod.ling imprinting *** collected d.ntal pulp stem cells from five controls and.four patients(three with Silver-Russell synd.ome and.one with Beckwith-Wied.mann synd.ome).Methylation analysis of imprinting control regions involved.in these synd.omes showed.a normal profile in controls and.the imprinting d.fect in *** results were maintained.in d.ntal pulp stem cells cultured.und.r osteogenic ***,we confirmed.the same pattern in six other loci involved.in imprinting d.seases in *** also confirmed.monoallelic expression of H19(an imprinted gene)in controls and.its biallelic expression in one *** imprinting control regions methylation analysis shows the strong potential of d.ntal pulp stem cells in mod.ling imprinting d.seases,in which imprinting regions are preserved.in culture and.d.ring osteogenic *** will allow to perform in vitro functional and.therapeutic tests in cells d.rived.from d.ntal pulp stem cells and.generate other cell-types.

关键词： pulp maintained fir