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EVALUATION OF THREE-DIMENSIONAL NUMERICAL MODEL FOR SALINE INTRUSION AND PURGING IN SEWAGE OUTFALLS

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Journal of Hydrodynamics 2007年第1期19卷 48-53页

作者： WU Wei YAN zhong-min College of Water Conservancy and Hydropower Engineering Hohai University Nanjing 210098 China

Saline intrusion into sewage outfalls will greatly decrease the efficiency of the structures. The numerical model for this flow has been limited to one- and two-dimensional ones. In this article, a three-dimensional numerical model for saline intrusion and purging in sewage outfalls was developed. The flow was modeled in three dimensions under turbulent conditions with the RNG k-ε turbulence model. The numerical results provided quantitative evidence of the fundamental flow mechanisms that took place during saline intrusion and purging. The comparisons of the results with that of two-dimensional model and that of experiments indicate that the three-dimensional numerical model developed in this article is more effective in predicting the internal flow in outfalls.

关键词： saline intrusion sea ouffalls numericalsimulation three-dimensional numerical model

A review on food oral tribology

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Friction 2022年第12期10卷 1927-1966页

作者： Wenhu XU Shuaike YU min zhong School of Mechatronics Engineering Key Laboratory of TribologyNanchang UniversityNanchang 330031China

Food entering the oral cavity undergoes a series of complex processing *** is subjected to compression and shearing by the teeth,tongue,and palate to reduce its size and mix with saliva until it is *** oral processing behaviors are thought to be closely related to both food and oral frictional *** effort has been made in recent decades about food oral tribology to explore this complicated lubrication *** the lubrication mechanism of food in the mouth is important for improving the consumption experience and developing the novel *** paper provides a new perspective on the effects of composition,texture,structure,and saliva-food component interactions on lubrication properties of different foods,the relationship between sensory perception and oral frictional behavior,and the mechanism and pattern of lubrication categorized by common food *** roles of tribology in the improvement of food taste,the search for healthier ingredient substitutes,functional foods,and the development of green foods are *** and numerical prediction models among physical properties,sensory perception,and frictional behavior of food are *** of simulating oral processing,such as the selection of friction pair materials,physical modification of contact surfaces,addition of saliva,different modes of motion,and contact forms are concluded and *** progress of commercial friction apparatus as well as customized friction devices applied to the food sector in recent years are *** characteristics,performances,and applications of these tribological instruments are analyzed and *** addition,the results achieved by oral tribology in identifying adulterated foods and ensuring food safety are ***,some suggestions are put forward for the current challenges and future development of food oral tribology.

关键词： food oral tribology in vitro friction tests lubrication behavior Stribeck curve sensory perception food development and detection

The role of all-trans retinoic acid in the biology of Foxp3＋ regulatory T cells

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Cellular & Molecular Immunology 2015年第5期12卷 553-557页

作者： zhong-min Liu Research Center for Translational Medicine East Hospital Tongji University School of Medicine Shanghai China Division of Rheumatology Penn State Hershey College of Medicine Hershey PA USA Division of Liver Surgery First Affiliated Hospital of Nanjing Medical University Nanjing China Division of Rheumatology Immunology and Nephrology Zhejiang Provincial Traditional Chinese Medicine and Western Medicine Hospital Hangzhou China These authors contributed equally.

Regulatory T （Treg） cells are necessary for immune system homeostasis and the prevention of autoimmune diseases. Foxp3 is specifically expressed in Treg cells and plays a key role in their differentiation and function. Foxp3＋ Treg cells are consisted of naturally occurring, thymus-derived Treg （nTreg） and peripheral-induced Treg （iTreg） cells that may have different functional characteristics or synergistic roles. AII-trans retinoic acid （atRA）, a vitamin A metabolite, regulates a wide range of biological processes, including cell differentiation and proliferation. Recent studies demonstrated that atRA also regulates the differentiation of T helper （Th） cells and Treg cells. Moreover, atRA also sustains nTreg stability under inflammatory conditions. In this review, we summarize the significant progress of our understanding of the role（s） and mechanisms of atRA in Treg biology.

关键词： atRA autoimmune diseases Foxp3 Treg cells

Novel model of material removal rate on ultrasonic-assisted chemical mechanical polishing for sapphire

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Friction 2023年第11期11卷 2073-2090页

作者： Mufang ZHOU min zhong Wenhu XU Department of Mechanical Engineering Key Laboratory of TribologyNanchang UniversityNanchang 330031China

Ultrasonic-assisted chemical mechanical polishing(UA-CMP)can greatly improve the sapphire material removal and surface quality,but its polishing mechanism is still *** paper proposed a novel model of material removal rate(MRR)to explore the mechanism of sapphire *** contains two modes,namely two-body wear and ***,the atomic force microscopy(AFM)in-situ study,computational fluid dynamics(CFD)simulation,and polishing experiments were conducted to verify the model and reveal the polishing *** the AFM in-situ studies,the tip scratched the reaction layer on the sapphire *** pit with a 0.22 nm depth is the evidence of two-body *** CFD simulation showed that abrasives could be driven by the ultrasonic vibration to impact the sapphire surface at high *** maximum total velocity and the air volume fraction(AVF)in the central area increased from 0.26 to 0.55 m/s and 20%to 49%,respectively,with the rising amplitudes of 1–3μ***,the maximum total velocity rose slightly from 0.33 to 0.42 m/s,and the AVF was nearly unchanged under 40–80 r/*** indicated that the ultrasonic energy has great effects on the abrasive-impact *** UA-CMP experimental results exhibited that there was 63.7%improvement in MRR when the polishing velocities rose from 40 to 80 r/*** roughness of the polished sapphire surface was R_(a)=0.07 *** identified that the higher speed achieved greater MRR mainly through the two-body wear *** study is beneficial to further understanding the UA-CMP mechanism and promoting the development of UA-CMP technology.

关键词： sapphire ultrasonic-assisted chemical mechanical polishing(UA-CMP) material removal rate(MRR)predictive model atomic force microscopy(AFM)in-situ studies computational fluid dynamics(CFD)

High-speed wind tunnel test of the CAE aerodynamic validation model

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Chinese Journal of Aeronautics 2018年第3期31卷 439-447页

作者： Roy GEBBINK Ganglin WANG min zhong German-Dutch Wind Tunnels Marknesse 8316 PR The Netherlands Chinese Aeronautical Establishment Beijing 100012 China

For the purpose of establishing and validating aerodynamic performance predictions at transonic Mach numbers, a wind tunnel test was conducted in the High-Speed Tunnel（HST） of the German-Dutch Wind Tunnels. The test article is the aerodynamic validation model from the Chinese Aeronautical Establishment, which is a full-span scale model representation of a business jet aircraft. The wind tunnel test comprised of parallel deployments of balance, pressures, infrared thermography, and model marker measurement techniques. Dedicated investigations with a dummy support were conducted as well, in order to derive and correct for the interference that the support system imposed on the overall model loads. This enabled the establishment of a comprehensive dataset in which the steady overall model loads, the wing load distribution, the state of the wing boundary layer, and the aeroelastic wing shape were quantified for conditions up to and beyond the cruise Mach number of 0.85.

关键词： Wind tunnel test Aerodynamic validation model Model deformation Support interference

On Randers Metrics with Isotropic S-Curvature

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Acta Mathematica Sinica,English Series 2008年第5期24卷 789-796页

作者： zhong min SHEN Hao XING Department of Mathematics IUPUI Indianapolis IN 46202-3216 USA Department of Mathematics University of Michigan Ann Arbor MI 48109 USA

In this paper, we study a class of Finsler metrics defined by a vector field on a Riemannian space form. We give an explicit formula for those with isotropic S-curvature. This class contains all Randers metrics of con... 详细信息

关键词： Randers metrics S-curvature

Switchable vortex beam polarization state terahertz multi-layer metasurface

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Chinese Physics B 2022年第11期31卷 309-315页

作者： min zhong Jiu-Sheng Li Center for THz Research China Jiliang UniversityHangzhou 310018China

We propose a switchable vortex beam polarization state terahertz multi-layer metasurface,which consists of threelayer elliptical metal crosses,four-layer dielectrics,and two-layer hollow metal circles,which are alternately *** the normal incidence of left-handed circularly polarized(LCP)wave and the right-handed circularly polarized(RCP)waves,the proposed structure realizes three independent control functions,i.e.,focused and vortex beam,vortex beam with different topological charges,and polarization states switching,and azimuth switching of two vortex beams with different polarization *** results show that the proposed metasurface provides a new idea for investigating the multifunctional terahertz wave modulation devices.

关键词： terahertz wave switchable vortex beam polarization states flexible manipulation

A New Triterpenoid Saponin from Codonopsis lanceolata

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Chinese Chemical Letters 2006年第11期17卷 1460-1462页

作者： zhong YUAN Zhi min LIANG School of Traditional Chinese Materia Medica Shenyang Pharmaceutical University Shenyang 110016

A new triterpenoid saponin, named codonolaside （1） was isolated from the root of Codonopsis lanceolata. Its structure was determined by analysis of its spectral and chemical data.

关键词： Codonopsis lanceolata triterpenoid saponin codonolaside.

Numerical simulation of low-Reynolds number flows past two tandem cylinders of different diameters

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Water Science and Engineering 2013年第4期6卷 433-445页

作者： Yong-tao WANG zhong-min YAN Hui-min WANG College of Environmental Science and Engineering Suzhou University of Science and Technology College of Water Conservancy and Hydropower Engineering Hohai University College of Environment Hohai University

The flow past two tandem circular cylinders of different diameters was simulated using the finite volume method. The diameter of the downstream main cylinder （D） was kept constant, and the diameter of the upstream control cylinder （d） varied from 0.1D to D. The studied Reynolds numbers based on the diameter of the downstream main cylinder were 100 and 150. The gap between the control cylinder and the main cylinder （G） ranged from 0.1D to 4D. It is concluded that the gap-to-diameter ratio （G/D） and the diameter ratio between the two cylinders （d/D） have important effects on the drag and lift coefficients, pressure distributions around the cylinders, vortex shedding frequencies from the two cylinders, and flow characteristics.

关键词： two tandem cylinders vortex shedding drag force lift force numerical simulation