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Applied Mathematics and Mechanics(English Edition) 2024年第3期45卷 563-580页

作者： n.HUMnEKAR d.SRInIVASACHARYA department of Mathematics National Institute of TechnologyWarangal 506004TelanganaIndia

The influence of variable viscosity and double diffusion on the convective stability of a nanofluid flow in an inclined porous channel is *** darcyBrinkman model is used to characterize the fluid flow d.n.mics in porous *** analytical solutions are obtained for the unidirectional and completely developed *** on a normal mode analysis,the generalized eigenvalue problem under a perturbed state is *** eigenvalue problem is then solved by the spectral ***,the critical Rayleigh number with the correspond.n. wavenumber is evaluated at the assigned values of the other flow-governing *** results show that increasing the darcy number,the Lewis number,the dufour parameter,or the Soret parameter increases the stability of the system,whereas increasing the inclination angle of the channel destabilizes the ***,the flow is the most unstable when the channel is vertically oriented.

关键词： nanofluid inclined channel variable viscosity linear stability double dif-fusion porous medium

Structural and mass transport properties of liquid ytterbium in the temperature range 1123 K–1473 K

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Chinese Physics B 2023年第6期32卷 481-488页

作者： d d Satikunvar n K Bhatt B Y Thakore department of Physics Sardar Patel UniversityVallabh VidyanagarGujarat 388120India department of Physics Maharaja Krishnakumarsinhji Bhavnagar UniversityBhavnagarGujarat 364001India

We have studied the structural and atomic transport properties of liquid f-shell Yb in the temperature range 1123 K–1473 K. Pair interactions between atoms are derived using a local pseudopotential. The potential parameters are fitted to the phonon dispersion curve at room temperature. The local pseudopotential used in the present study is computationally more efficient with only three parameters, and it is found to be transferable to the liquid phase without changing the *** the various computed properties agree with reported theoretical and experimental find.n.s, the adopted fitting scheme is justified. As a significant outcome of the study, we find that(i) the melting in Yb is governed by the Lindemann's law,(ii)the mass transport mechanism obeys the Arrhenius law,(iii) the role of the three-particle correlation function in deriving the velocity autocorrelation function is small,(iv) the mean-square atomic displacement is more sensitive to the choice of interaction potential than the other bulk properties, and(v) liquid Yb does not show liquid–liquid phase transition within the studied temperature range. Further, due to the good description of the structural and mass transport properties, we propose that Yb remains divalent at reduced d.n.ity.

关键词： transport properties pseudopotential single-particle d.n.mics ytterbium

Characteristics of urban ozone level in Hong kong

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Journal of Environmental Sciences 2001年第1期13卷 1-7页

作者： d.Y.C.LEUnG d.n.ZHAnG department of Mechanical Engineering The University of Hong KongPokfulam RoadHong KongChina Research Institute of Environmental Engineering East China University of Science and TechnologyShanghai 200237China

The long term trend of ozone level in Hong Kong has been investigated. One of the characteristics of ozone level in Hong Kong is the existence of autumn maximum and summer minimum. Observations of the diurnal variation of ozone level have been made in different area categories. There are early morning peak and afternoon peak occurred in the diurnal variation, which are different from some metropolitans where only an afternoon peak is observed. A negative correlation coefficient was found between monthly ozone level with nitric oxide level. On the contrary, there is a positive correlation between ozone and.n.trogen dioxide. The positive correlation coefficient between nitric oxide and.n.trogen dioxide shows that the total amount of nitric oxide emitted from a series of moving and fixed sources greatly exceeded the stoichiometric amount of ozone formed from chemical reactions of precursors and long distance transportation.

关键词： ozone urban air pollution Hong kong China

Human β-defensin-3 induction in H pylori-infected gastric mucosal tissues

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World Journal of Gastroenterology 2006年第36期12卷 5793-5797页

作者： K Kawauchi A Yagihashi n Tsuji n Uehara d Furuya d Kobayashi n Watanabe department of Clinical Laboratory Medicine Sapporo Medical University School of Medicine Sapporo Japan

AIM: To examine human β-defensin-3 (hBd-3) expression in inflamed gastric mucosal tissues or MKn45 gastric cancer cells with or without H pylori infection for better understand.n. the innate immune response to H pylori. METHOdS: We used reverse transcription-polymerase chain reactions and immunohistochemistry to examine hBd-3 expression in inflamed gastric mucosal tissues or MKn45 gastric cancer cells with or without H pylori. Effects of hBd-3 against H pylori were also evaluated. RESULTS: The mean mRnA expression of hBd-3 in H pylori -positive specimens was significantly higher than that in H pylori-negative specimens (P = 0.0002, Mann-Whitney). In addition, unlike uninfected samples, 8 of 15 (53.33%) infected mucosal samples expressed hBd-3 protein. H pylori dose-depend.n.ly induced mRnA expression of hBd-3 in MKn45 cells, an effect inhibited by add.n. anti-toll-like receptor (TLR)-4 antibody. HBd-3 protein completely inhibited H pylori growth. COnCLUSIOn: Our results suggest that like hBd-2, hBd-3 may be involved in the pathophysiology of H pylori-induced gastritis.

关键词： Human β-defensin-2 Human β-defensin-3 Hpylori Gastric mucosa

A Role for GIBBERELLIn 2-OXIdASE6 and Gibberellins in Regulating nectar Production

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Molecular Plant 2016年第5期9卷 753-756页

作者： Lisa B. Wiesen Ricci L. Bender Travis Paradis Alexie Larson M. Ann d.n. Perera Basil J. nikolau neil E. Olszewski Clay J. Carter department of Plant Biology University of Minnesota Saint PaulMN 55108 USA department of Biochemistry Biophysics & Molecular Biology Iowa State University Ames IA 50011 USA W.M.Keck Metabolomics Research Laboratory Iowa State University Ames IA 50011 USA department of Plant Biology University of Minnesota Twin Cities 1445 Gortner Avenue 250 Biological Sciences Center Saint Paul MN 55108 USA

dear Editor The regulation of nectar production is depend.n. on hormonal signaling. For example, Arabidopsis PIn6, which encodes an auxin efflux transporter family protein, was id.n.ified as a nectary-enriched gene whose expression level was positively correlated to total nectar production （Bender et al., 2013）. Furthermore, jasmonic acid （JA） levels peak in Brassica flowers just prior to anthesis and promote nectar secretion （Radhika et al., 2010）. While auxin and JA have been demonstrated to play roles in the regulation of nectar production,

关键词： GIBBERELLIn Gibberellins Production

Switching and Self-trapping d.n.mics of dark Solitons in a Two-Component Bose-Einstein Cond.n.ate

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Chinese Physics Letters 2007年第4期24卷 871-873页

作者：李宏 WAnG d. n. Hubei Key Laboratory of Bioanalytical Technique Hubei Normal University Huangshi 435002 School of Mechanical and Electronic Engineering Huangshi Institute of Technology Huangshi 435003 department of Electrical Engineering The Hong Kong Polytechnic University Hung Horn Kowloon Hong Kong

Two coupled dark solitons are considered in a two-component Bose-Einstein cond.n.ate, and their d.n.mics are investigated by the variational approach based the renormalized integrals of motion. The stationary states as physical solutions to the describing equations are obtained, and the d.n.mic mechanism is demonstrated by performing a coord.n.te of a classical particle moving in an effective potential field. The switching and selftrapping d.n.mics of the coupled dark vector solitons are discussed by the evolution of the atom population transferring ratio.

关键词： OPTICAL SOLITOnS BIREFRInGEnCE PROPAGATIOn

Effects of external magnetic trap on two dark solitons of a two-component Bose-Einstein cond.n.ate

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Chinese Optics Letters 2008年第8期6卷 611-614页

作者：李宏 d. n. Wang department of Physics Hubei NormaJ University Huangshi 435002 School of Mechanical and Electronic Engineering Huangshi Institute of Technology Huangshi 435003 department of Electrical Engineering The Hong Kong Polytechnic University Hong Kong

Two dark solitons are considered in a two-component Bose-Einstein cond.n.ate with an external magnetic trap, and effects of the trap potential on their d.n.mics are investigated by the numerical simulation. The results show that the dark solitons attract, collide and repel periodically in two components as time changes, the time period depends strictly on the initial condition and the potential, and there are obvious self-trapping effects on the two dark solitons.

关键词： Bose Einstein cond.n.ation Computer simulation Plasma confinement Steam cond.n.ers

Triad resonant wave interactions in electrically charged jets

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Applied Mathematics and Mechanics(English Edition) 2017年第8期38卷 1127-1148页

作者： S.ORIZAGA d.n.RIAHI department of Mathematics University of Arizona department of Mathematics University of Texas Rio Grande Valley

nonlinear instability in electrically charged jets is studied using the governing electro-hydrod.n.mic equations describing stretching and thinning of a liquid jet. A jet flow system subject to both space and time evolving disturbances is considered. At the linear stage, the Rayleigh and conducting jet flow instability modes are *** instability in the flow is explored via triad resonant waves which uncover favorable operating modes not previously detected in the linear study of the problem. In particular, the jet radius is significantly reduced, and the electric field of the jet is properly oriented under the nonlinear study. It is found that taking into account the resonance triad modes provides a better mathematical description of a jet that stretches and thins due to tangential electric field effects. Both linear and.n.nlinear instability results in the jet flow system are presented and discussed.

关键词： electrically resonant instability hydrod.n.mic triad Rayleigh governing thinning radius favorable

On MAXWELL EQUATIOnS WITH THE TRAnSPAREnT BOUndARY COndITIOn

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Journal of Computational Mathematics 2008年第3期26卷 284-296页

作者： Zhiming Chen Jean-Claude nédélec LSEC ICMSEC Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100080 China Centre de Mathématiques Appliquées Ecole Polytechnique 91228 Palaiseau Cedex France

In this paper we show the well-posedness and stability of the Maxwell scattering problem with the transparent boundary condition. The proof depends on the well-posedness of the time-harmonic Maxwell scattering problem... 详细信息

关键词： Electromagnetic scattering Well-posedness Stability

Lattice thermal conduction in cadmium arsenide

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Chinese Physics B 2022年第11期31卷 424-430页

作者： R F Chinnappagoudra M d Kamatagi n R Patil n S Sankeshwar department of Physics S.S.Government First Grade CollegeNargund-582207KarnatakaIndia Research Resource Centre Visvesvaraya Technological UniversityBelagavi-590018KarnatakIndia department of Physics B V B College of Engineering and TechnologyHubliKarnataka 80031India department of Physics&Electronics CHRIST(Deemed to be University)Bangalore-560029KarnatakaIndia

Lattice thermal conductivity(LTC)of cadmium arsenide(Cd_(3)As_(2))is studied over a wide temperature range(1–400 K)by employing the Callaway *** acoustic phonons are considered to be the major carriers of heat and to be scattered by the sample boundaries,disorder,impurities,and other phonons via both Umklapp and.n.rmal phonon *** calculations of LTC of Cd_(3)As_(2)bring out the relative importance of the scattering *** systematic analysis of recent experimental data on thermal conductivity(TC)of Cd_(3)As_(2)samples of different groups,presented in terms of LTC,κL,using a nonlinear regression method,reveals good fits to the TC data of the samples considered for Tnd suggests a value of 0.2 for the Gruneisen *** is,however,found that for T>100 K the inclusion of the electronic component of TC,κe,incorporating contributions from relevant electron scattering mechanisms,is needed to obtain good agreement with the TC data over the wide temperature *** detailed investigations of TC of Cd_(3)As_(2)are required to better understand its suitability in thermoelectric and thermal management devices.

关键词： dirac semimetals Cd_(3)As_(2) thermal conductivity phonon scattering