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Comparative analysis of different static mixers performance by CFD technique:An innovative mixer

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Chinese Journal of Chemical Engineering 2020年第3期28卷 672-684页

作者： m.m.Haddadi S.H.Hosseini D.Rashtchian martin Olazar Chemical and Petroleum Engineering Department Sharif University of TechnologyTehranIran Department of Chemical Engineering.Ilam University llam 69315-516Iran Department of Chemical Engineering University of the Basque Country(UPV/EHU)Sarriena s/nLeioaSpain

The flow and mixing behavior of two miscible liquids has been studied in an innovative static mixer by using CFD,with Reynolds numbers ranging from 20 to *** performance of the new mixer is compared with those of Kenics,SmX,and Komax static *** pressure drop ratio(Z-factor),coefficient of variation(CoV),and extensional efficiency(α)features have been used to evaluate power consumption,distributive mixing,and dispersive mixing performances,respectively,in all *** model is firstly validated based on experimental data measured for the pressure drop ratio and the coefficient of *** results are consistent with measured data and those obtained by available correlations in the *** new mixer shows a superior mixing performance compared to the other mixers.

关键词： CFD New static mixer Coefficient of variation Pressure drop ratio

Synchronization of Weighted Essentially Non-Oscillatory methods

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Communications in Computational Physics 2008年第6期4卷 56-71页

作者： Ellen m.Taylor m.Pino martin Department of mechanical and Aerospace Engineering Princeton UniversityPrincetonNJ 08544USA

Weighted essentially non-oscillatory(WENO)methods have been developed to simultaneously provide robust shock-capturing in compressible fluid flow and avoid excessive damping of fine-scale flow features such as *** certain conditions in compressible turbulence,however,numerical dissipation remains unacceptably high even after optimization of the linear component that dominates in smooth *** the nonlinear error that remains,we demonstrate that a large fraction is generated by a“synchronization deficiency”that interferes with the expression of theoretically predicted numerical performance characteristics when the WENO adaptation mechanism is *** deficiency is illustrated numerically in simulations of a linearly advected sinusoidal wave and the Shu-Osher problem[***.,83(1989),pp.32-78].It is shown that attempting to correct this deficiency through forcible synchronization results in violation of *** conclude that,for the given choice of candidate stencils,the synchronization deficiency cannot be adequately resolved under the current WENO smoothness measurement technique.

关键词： Direct numerical simulation large eddy simulation compressible turbulence shock capturing.

Role of the adipocyte immune brain axis in Parkinson's disease:friend or foe?

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Neural Regeneration Research 2023年第11期18卷 2399-2400页

作者： martin Regensburger Thomas m.Kinfe Division of molecular Neurology Friedrich Alexander-Universität Erlangen-Nürnberg(FAU)ErlangenGermany Center for Rare Diseases Erlangen(ZSEER) University Hospital ErlangenFriedrich-Alexander-Universität Erlangen-Nürnberg(FAU)ErlangenGermany Division of Functional Neurosurgery and Stereotaxy Friedrich-Alexander University(FAU)Erlangen-NürnbergErlangenGermany

The classical role of adipocytokines is a negative feedback mechanism,providing information about bodily energy reserves to the brain,and thus controlling satiety and food intake (Campfield et al.,1995).Adipose tissue forms the largest endocrine organ of the *** the initial description of leptin and its receptor,LEPR/OBR,with its main active isoform OBRb,there was an initial hope for a drugable pathway to counteract the increasing burden of overweight/adiposity,metabolic syndrome,and related disorders (Figure1).

关键词： intake Figure

The Ins and Outs of the Rice AGAmOUS Subfamily

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molecular Plant 2013年第3期6卷 650-664页

作者： Ludovico Dreni michela Osnato martin m. Kater Department of Biosciences Università degli Studi di Milano via Celoria 26 20133 Milan Italy

Genes of the AGAmOUS subfamily have been shown to play crucial roles in reproductive organ identity determination, fruit, and seed development. They have been deeply studied in eudicot species and especially in Arabidopsis. Recently, the AGAmOUS subfamily of rice has been studied for their role in flower development and an enormous amount of data has been generated. In this review, we provide an overview of these data and discuss the conservation of gene functions between rice and Arabidopsis.

关键词： transcriptional control and transcription factors floral development reproductive biology Arabidopsis rice.

Updates in penile prosthesis infections

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Asian Journal of Andrology 2020年第1期22卷 28-33页

作者： Amanda R Swanton Ricardo m munarriz martin S Gross Department of Surgery Section of UrologyDartmouth-Hitchcock Medical CenterLebanonNH 03766USA Department of Urology Boston Medical CenterBostonMA02118USA

Inflatable penile prostheses are an important tool in the treatment of medically refractory erectile *** of the major complications associated with these prostheses is infections,which ultimately require device explanation and placement of a new *** the past several decades,significant work has been done to reduce infection rates and optimize treatment strategies to reduce patient *** article reviews the current state of knowledge surrounding penile prosthesis infections,with attention to the evidence for methods to prevent infection and best practices for device reimplantation.

关键词： erectile dysfunction infection penile prosthesis

Controlling the magnetic state of the proximate quantum spin liquid α-RuCl_(3) with an optical cavity

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npj Computational materials 2023年第1期9卷 265-274页

作者： Emil Viñas Boström Adithya Sriram martin Claassen Angel Rubio max Planck Institute for the Structure and Dynamics of matter Luruper Chaussee 14922761 HamburgGermany Department of Physics Stanford UniversityStanfordCA 94305USA Department of Physics and Astronomy University of PennsylvaniaPhiladelphiaPA 19104USA Center for Computational Quantum Physics Flatiron InstituteSimons FoundationNew York CityNY 10010USA

Harnessing the enhanced light-matter coupling and quantum vacuum fluctuations resulting from mode volume compression in optical cavities is a promising route towards functionalizing quantum materials and realizing exotic states of ***,we extend cavity quantum electrodynamical materials engineering to correlated magnetic systems,by demonstrating that a Fabry-Pérot cavity can be used to control the magnetic state of the proximate quantum spin liquidα-RuCl_(3).Depending on specific cavity properties such as the mode frequency,photon occupation,and strength of the light-matter coupling,any of the magnetic phases supported by the extended Kitaev model can be *** particular,in the THz regime,we show that the cavity vacuum fluctuations alone are sufficient to bringα-RuCl_(3) from a zigzag antiferromagnetic to a ferromagnetic *** external pumping of the cavity in the few photon limit,it is further possible to push the system into the antiferromagnetic Kitaev quantum spin liquid state.

关键词： state quantum magnetic

Fit to fight——from military hygiene to wellbeing in the British Army

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military medical Research 2020年第4期7卷 482-488页

作者： martin C.m.Bricknell Colonel David A.Ross Health and military medicine Conflict and Health Research GroupSchool of Security StudiesKing’s College LondonStrand CampusLondon WC2R 2LSUK Parkes Professor of Preventive medicine Robertson HouseCamberley GU154NAUK

This paper reviews the historical evolution of the language and organization surrounding the health of personnel in the British Army from‘hygiene’through to‘wellbeing’.It starts by considering the health of the army in the midnineteenth century and the emergence of military hygiene as a professional *** continues by looking at advances in military hygiene in the two world *** was replaced by the term‘health’in the 1950 s as the collective noun used by professionals working in this *** unity split when the professions of occupational medicine and public health established separate faculties and training ***,the health issues for the armed forces remain fundamentally *** forward,the term‘wellbeing’is helping to refresh the close relationships between executives,their medical advisers and those within the population of health professions charged with keeping the British Army *** core theme is the collaborations between civil society,executive leadership and medical services in maximizing the health of the military population from recruitment through to life as a veteran.

关键词： Public health Hygiene Occupational medicine

WEAK ERROR ESTImATES FOR TRAJECTORIES OF SPDEs UNDER SPECTRAL GALERKIN DISCRETIZATION

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Journal of Computational mathematics 2018年第2期36卷 159-182页

作者： Charles-Edouard Brehier martin Hairer Andrew m. Stuart Univ Lyon CNRS Universite Claude Bernard Lyon 1 UMR5208 Institut Camille Jordan F-69622 Villeurbanne France Department of mathematics Imperial College London London SW7 2AZ UK Computing and mathematical Sciences California Institute of Technology 1200 E. California Blvd. MC 305-16 Pasadena CA 91125 USA

We consider stochastic semi-linear evolution equations which are driven by additive, spatially correlated, Wiener noise, and in particular consider problems of heat equation （analytic semigroup） and damped-driven wave equations （bounded semigroup） type. We discretize these equations by means of a spectral Galerkin projection, and we study the approximation of the probability distribution of the trajectories： test functions are regular, but depend on the values of the process on the interval [0, T]. We introduce a new approach in the context of quantative weak error analysis for discretization of SPDEs. The weak error is formulated using a deterministic function （It6 map） of the stochastic convolution found when the nonlinear term is dropped. The regularity properties of the It6 map are exploited, and in particular second-order Taylor expansions employed, to transfer the error from spectral approximation of the stochastic convolution into the weak error of interest. We prove that the weak rate of convergence is twice the strong rate of convergence in two situations. First, we assume that the covariance operator commutes with the generator of the semigroup： the first order term in the weak error expansion cancels out thanks to an independence property. Second, we remove the commuting assumption, and extend the previous result, thanks to the analysis of a new error term depending on a commutator.

关键词： Stochastic Partial Differential Equations Weak approximation Spectral Galerkin discretization

Parameter Ecology for Feedback Vertex Set

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Tsinghua Science and Technology 2014年第4期19卷 387-409页

作者： Bart m.P.Jansen Venkatesh Raman martin Vatshelle the Department of Informatics University of Bergen 5005 Bergen Norway the Institute of mathematical Sciences Chennai India

This paper deals with the FEEDBACK VERTEX SET problem on undirected graphs, which asks for the existence of a vertex set of bounded size that intersects all cycles. Due it is theoretical and practical importance,the problem has been the subject of intensive study. motivated by the parameter ecology program we attempt to classify the parameterized and kernelization complexity of FEEDBACK VERTEX SET for a wide range of *** survey known results and present several new complexity classifications. For example, we prove that FEEDBACK VERTEX SET is fixed-parameter tractable parameterized by the vertex-deletion distance to a chordal graph. We also prove that the problem admits a polynomial kernel when parameterized by the vertex-deletion distance to a pseudo forest, a graph in which every connected component has at most one cycle. In contrast, we prove that a slightly smaller parameterization does not allow for a polynomial kernel unless NP coNP=poly and the polynomial-time hierarchy collapses.

关键词： feedback vertex set parameterized complexity parameter ecology program structural parameterizations kernelization