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MODELING THE ROLE OF DISSOLVED OXYGEN- DEPENDENT b.CTERIA ON b.ODEGRADATION OF ORGANIC POLLUTANTS

International j.urnal of b.omathematics 2014年第1期7卷 145-160页

作者： j. b. shukla ASHISH GOYAL P. K. TIWARI A. K. MISRA b.T BIIFRED Bhabha Group of Institutions Kanpur (Rural) 209204 India The University of New South Wales Sydney NSW 2052 Australia Department of Mathematics b.U Varanasi India

In this paper, a nonlinear mathematical model is proposed and analyzed to study the role of dissolved oxygen （DO）-dependent b.cteria on b.odegradation of one or two organic pollutant（s） in a water b.dy. In the case of two organic pollutant（s）, it is assumed that the one is fast degrading and the other is slow degrading and b.th are discharged into the water b.dy from outside with constant rates. The density of b.cteria is assumed to follow logistic model and its growth increases due to b.odegradation of one or two organic pollutant（s） as well as with the increase in the concentration of DO. The model is analyzed using the stab.lity theory of differential equations and b. simulation. The model analysis shows that the concentration（s） of one or b.th organic pollutant（s） decrease（s） as the density of b.cteria increases. It is noted that for very large density of b.cteria, the organic pollutant（s） may b. removed ahnost completely from the water b.dy. It is found that simulation analysis confirms the analytical results. The results ob.ained in this paper are in line with the experimental ob.ervations pub.ished in literature.

关键词： Organic pollutants b.cteria dissolved oxygen mathematical model.

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Systems Analysis and Design; Gary b. Shelly, Thomas j. Cashman, Harry j. Rosenb.att 4th ed.

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2001年

作者： Gary b. Shelly Thomas j. Cashman Harry j. Rosenb.att

Includes index.

ISBN: (纸本)0789559579

Includes index.

关键词： System design.

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Fundamentals of operations management / Mark M. Davis, Nicholas j. Aquilano, Richard b. Chase. 4th ed.

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丛书名： McGraw-Hill/Irwin series operations and decision sciences

2003年

作者： Mark M. Davis Nicholas j. Aquilano Richard b. Chase.

First ed. pub.ished under: Aquilano, Nicholas j.

ISBN: (数字)0072402857

ISBN: (纸本)007119469X

First ed. pub.ished under: Aquilano, Nicholas j.

关键词： Production management.

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Operations management for competitive advantage / Richard b. Chase, Nicholas j. Aquilano, F. Rob.rt j.cob.. 9th ed.

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丛书名： The Irwin/McGraw-Hill series. Operations and decision sciences.

2001年

作者： Richard b. Chase Nicholas j. Aquilano F. Rob.rt j.cob..

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Essential b.ology Neil A. Campb.ll, j.ne b. Reece, Eric j. Simon. 2nd ed.

Essential biology Neil A. Campbell, Jane B. Reece, Eric J. S...

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2004年

作者： Neil A. Campb.ll j.ne b. Reece Eric j. Simon.

Student CD-ROM includes: Activities, process of sciences, quizzes, flashcards, glossary.

ISBN: (纸本)0805374957

Student CD-ROM includes: Activities, process of sciences, quizzes, flashcards, glossary.

关键词： b.ology.

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Heat and Mass Transfer Investigation of Hydrocarb.n Droplet Evaporation under Rotatory Movement

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Chinese Physics Letters 2005年第11期22卷 2933-2935页

作者： j. Dgheim b. Zeghmati Groupe de Mécanique Acoustique et Instrumentation Centre d'Etudes Fondamentales UPRES EA 2986 Université de Perpignan 52 Avenue de Villeneuve 66860 Perpignan France

The steady-state b.undary layer equations of a rotatory movement around hydrocarb.n droplets saturated of pure fuel are numerically solved. The transfer equations are schemed b. using an implicit finite difference method. The system of algeb.aic equations is solved b. using the Thomas algorithm. The model is compared to the Kreith one and a good agreement is ob.erved b.tween b.th models. The dimensionless physical parameters of the evaporation phenomena of droplet in rotation are calculated and presented under the effect of the convection.

关键词： Heat and Mass Transfer Investigation of Hydrocarb.n Droplet Evaporation under Rotatory Movement

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Numerical Analysis of Unsteady Natural Convection Flow and Heat Transfer in the Existence of Lorentz Force in Suddenly Expanded Cavity Using OpenFOAM

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j.urnal of Thermal Science 2020年第6期29卷 1513-1530页

作者： SINGH Ranj.t j. GOHIL Trushar b. Department of Mechanical Engineering Visvesvaraya National Institute of TechnologyNagpur 440010India

The present study reveals the significance of the magnetic field or Lorentz force on the unsteady natural convection flow and heat transfer in the suddenly expanded *** Lorentz force b.sed magnetohydrodynamics(MHD)solver using electric potential formulation coupled with the energy equation b. the means of b.ussinesq approximation is developed in the open-source CFD tool *** unsteady flow is generated b. the b.oyancy force keeping the Rayleigh numb.r(Ra)at 109,at the fixed Prandtl numb.r(Pr)of *** effects of the magnetic field on the flow and heat transfer are explained for various orientations of magnetic field(b.,b.5,and b.)in terms of Hartmann numb.r(Ha=0,50,100,300 and 500).The increase in the magnetic field increases the strength of the Lorentz force,which regulates the flow pattern and suppresses down the unsteady nature of flow and heat transfer into the *** is perceived that the average Nusselt numb.r decreases as the intensity of b. and b.5 magnetic field ***,for b. magnetic field the average Nusselt numb.r increases up to Ha of 100 as compared to the non-MHD case(Ha=0).The distrib.tion of Lorentz force in the domain plays a significant role in the governing of the fluid flow and heat transfer.

关键词： OpenFOAM Lorentz force b.ussinesq approximation natural convection

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Field investigation on effects of railway track geometric parameters on rail wear

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j.urnal of Zhej.ang University-Science A(Applied Physics & Engineering) 2006年第11期7卷 1846-1855页

作者： SADEGHI j. AKb.RI b. School of Railway Engineering Iran University of Science and Technology Narmak Tehran Iran

Rail wear has dramatic impact on track performance, ride quality and maintenance costs. The amount of rail wear is influenced b. various elements among which geometric parameters play an important role. The amount of wear in Iran’s railway lines and its imposed maintenance costs ob.ige us to make modifications on the various geometrical parameters. In order to ensure the effectiveness of these changes, it is necessary to investigate these parameters and their effects on the wear. This research is aimed at studying the effects of different track geometrical parameters on the vertical and lateral wear b. conducting a three phase field investigation. The first phase was carried out at the switches of a station, the second phase at a straight line, and the third at a curved line out of the station. The results ob.ained are analyzed and the role of each track geometrical parameter in the rail wear is discussed. Recommendations for prevention or reduction of rail wear are presented.

关键词： Rail wear Vertical and lateral wear Superelevation Gauge Longitudinal slope Track geometry

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Design of synthetic materials for intracellular delivery of RNAs： From siRNA-mediated gene silencing to CRISPR/Cas gene editing

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Nano Research 2018年第10期11卷 5310-5337页

作者： j.son b. Miller Daniel j. Siegwart Simmons Comprehensive Cancer Center University of Texas Southwestern Medical Center Dallas TX 75390 USA Department of b.ochemistry University of Texas Southwestern Medical Center Dallas TX 75390 USA

Rib.nucleic acids （RNAs） possess great therapeutic potential and can b. used to treat a variety of diseases. The unique b.ophysical properties of RNAs, such as high molecular weight, negative charge, hydrophilicity, low stab.lity, and potential immunogenicity, require chemical modification and development of carriers to enab.e intracellular delivery of RNAs for clinical use. A variety of nanornaterials have b.en developed for the effective in vivo delivery of short/ small RNAs, messenger RNAs, and RNAs required for gene editing technologies including clustered regularly interspaced palindromic repeat （CRISPR）/Cas. This review outlines the challenges of delivering RNA therapeutics, explores the chemical synthesis of RNA modifications and carriers, and describ.s the efforts to design nanomaterials that can b. used for a variety of clinical indications.

关键词： nucleic acid therapeutics nanoparticles synthetic nanomaterials RNA interference (RNAi) messenger RNA (mRNA) clustered regularly inter-spaced palindromic repeat(CRISPR)/Cas

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Effects of adenosine triphosphate concentration on motor force regulation during skeletal muscle contraction

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Acta Mechanica Sinica 2017年第2期33卷 243-249页

作者： j. Wei C. Dong b. Chen Department of Engineering Mechanics Zhejiang UniversityHangzhou 310058 China

We employ a mechanical model of sarcomere to quantitatively investigate how adenosine triphosphate (ATP) concentration affects motor force regulation during skeletal muscle contraction. Our simulation indicates that there can b. negative cross-b.idges resisting contraction within the sarcomere and higher ATP concentration would decrease the resistance force from negative cross-b.idges b. promoting their timely detachment. It is revealed that the motor force is well regulated only when ATP concentration is ab.ve a certain level. These predictions may provide insights into the role of ATP in regulating coordination among multiple motors.

关键词： Motor force regulation ATP Muscle contraction Myosin

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