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Stagnation temperature effect on the conical shock with application for air

24th International Papillomavirus Conference and Clinical Workshop

作者： Sylviane Poncelet Pierre Cambron Sandra Giannini Brigitte Colau Franris Dessy toufik zahaf Ligia Pinto Karin Hardt Tino Schwarz Jacek Wysocki Marek Spaczynski Dominique Descamps GlaxoSmithKline Biologicals GlaxoSmithKline Biologicals GlaxoSmithKline Biologicals GlaxoSmithKline Biologicals GlaxoSmithKline Biologicals GlaxoSmithKline Biologicals National Cancer Institute GlaxoSmithKline Biologicals Stiftung Juliusspital Wuerzburg University of Medical Sciences Katedra Ginekologii Poloznictwa GlaxoSmithKline Biologicals

＜正＞Objectives:We have previously demonstrated that the HPV-16/18 AS04 vaccine candidate,provides a high level of efficacy against HPV-16/18 related cervical intraepithelial neoplasia（grade 2/3）,and sustained HPV-16/18 antibody levels up to 5.5 years In women 15-55 years old,we evaluated in cervico-vaginal secretions（CVS）the vaccine-induced HPV-16/18 immune responses[GSK 105879/014].

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Chinese Journal of Aeronautics 2018年第4期31卷 672-697页

作者： toufik ELAICHI toufik ZEBBICHE Aeronautical Sciences Laboratory Institute of Aeronautics and Space Studies University SAAD Dahlab of Blida 1B.P.270

The aim of this work is to realize a new numerical program based on the development of a mathematical model allowing determining the parameters of the supersonic flow through a conical shock under hypothesis at high temperature, in the context of correcting the perfect gas model. In this case, the specific heat at constant pressure does not remain constant and varies with the increase of temperature. The stagnation temperature becomes an important parameter in the *** mathematical model is presented by the numerical resolution of a system of first-order nonlinear differential equations with three coupled unknowns for initial conditions. The numerical resolution is made by adapting the higher order Runge Kutta method. The parameters through the conical shock can be determined by considering a new model of an oblique shock at high temperature. All isentropic parameters of after the shock flow depend on the deviation of the flow from the transverse direction. The comparison of the results is done with the perfect gas model for low stagnation temperatures, upstream Mach number and cone deviation angle. A calculation of the error is made between our high temperature model and the perfect gas model. The application is made for air.

关键词： Calorically imperfect gas Conical shock High temperature Numerical integration Oblique shock Perfect gas model Runge Kutta method Supersonic flow

Supersonic Two-Dimensional Minimum Length Nozzle Design at High Temperature. Application for Air

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Chinese Journal of Aeronautics 2007年第1期20卷 29-39页

作者： toufik Zebbiche ZineEddine Youbi Department of Aeronautics Faculty of Sciences of Engineer University SAAD Dahleb of Blida B.P. 270 Ouled Yaich 09470 Blida Algeria.

When the stagnation temperature of a perfect gas increases, the specific heat ratio does not remain constant any more, and start to vary with this temperature. The gas remains perfect, its state equation remains always valid, except it will name in more calorically imperfect gas or gas at High Temperature. The goal of this work is to trace the profiles of the supersonic Minimum Length Nozzle with centered expansion when the stagnation temperature is taken into account, lower than the threshold of dissociation of the molecules and to have for each exit Mach number several nozzles shapes by changing the value of the temperature. The method of characteristics is used with a new form of the Prandtl Meyer function at high temperature. The resolution of the obtained equations is done by the second order of fmite differences method by using the predictor corrector algorithm. A study on the error given by the perfect gas model compared to our model is presented. The comparison is made with a calorically perfect gas for goal to give a limit of application of this model. The application is for the air.

关键词： supersonic flow minimum length nozzle calorically imperfect gas interpolation Prandtl Meyer function stretching function Simpson quadrature supersonic parameters conception method of characteristics

Effect of Stagnation Temperature on the Supersonic Two-Dimensional Plug Nozzle Conception. Application for Air

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Chinese Journal of Aeronautics 2007年第1期20卷 15-28页

作者： toufik Zebbiche ZineEddine Youbi Department of Aeronautics Faculty of Sciences of Engineer University SAAD Dahleb of Blida B.P. 270 Ouled Yaich 09470 Blida Algeria

When the stagnation temperature of a perfect gas increases, the specific heats and their ratio do not remain constant any more and start to vary with this temperature. The gas remains perfect, its state equation remains always valid, except it will name in more calorically imperfect gas or gas at High Temperature. The goal of this research is to trace the profiles of the supersonic plug nozzle when this stagnation temperature is taken into account, lower than the threshold of dissociation of the molecules, by using the new formula of the Prandtl Meyer function, and to have for each exit Mach number, several nozzles shapes by changing the value of this temperature. A study on the error given by the PG （perfect gas） model compared to our model at high temperature is presented. The comparison is made with the case of a calorically perfect gas aiming to give a limit of application of this model. The application is for the air.

关键词： supersonic flow plug nozzle calorically imperfect gas interpolation Prandtl Meyer functiom stretching fimction Simpson quadrature, supersonic parameters conception.

Delivering audiovisual content with MPEG-21-enabled cross-layer QoS adaptation

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第5期7卷 784-793页

作者： AHMED toufik DJAMA Ismail CNRS-LaBRI Laboratory University of Bordeaux-1.351 Cours de la Libération Talence F-33405 France

Future multimedia communication systems have to support the user’s needs, the terminal capabilities, the content specification and the underlying networking technologies. The related protocols and applications must be designed from this integration perspective in a cross-layer centric manner. In this paper, we propose an implementation of a streaming service (e.g., Television over IP service) with a unified QoS management concept that enables an IP driven integration of different system components (terminal, user, content, and network). The MPEG-21 framework is used to provide a common support for imple- menting and managing the end-to-end QoS. The main focus of this paper is on the architecture design, protocols specification and implementation evaluation. Performance evaluations using PSNR and SSIM objective video quality metrics show the benefit of the proposed MPEG-21-enabled cross-layer adaptation.

关键词： Cross-layer adaptation, MPEG-21 multimedia framework, Real-time streaming, QoS

Unsteady Heat Transfer in Bilayer,and Three-Layer Materials

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Fluid Dynamics & Materials Processing 2023年第4期19卷 977-990页

作者： toufik Sahabi Smain Balaska Physics Department Faculty of SciencesUniversity of Saida Dr.Moulay TaharSaida20000Algeria Theoretical Physics Laboratory University of Oran-1-Ahmed Ben BellaOran31000Algeria

The heat transfer equation is used to determine the heat flow by conduction through a composite material along the real *** analytical dimensionless analysis is implemented in the framework of a separation of variables method(SVM).This approach leads to an Eigenvalues problem that is solved by the Newton’s *** types of dynamics are found:An unsteady condition(in the form of jumps or drops in temperatures depending on the considered case),and a permanent equilibrium(tending to the ambient temperature).The validity and effectiveness of the proposed approach for any number of adjacent layers is also *** is shown that,as expected,the diffusion of the temperature is linked to the ratio of the thermo-physical properties of the considered layers and their number.

关键词： Heat transfer conduction eigen values composite materials thermo-physical properties

New Online DV-Hop Algorithm via Mobile Anchor for Wireless Sensor Network Localization

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Tsinghua Science and Technology 2023年第5期28卷 940-951页

作者： Oumaima Liouane Smain Femmam toufik Bakir Abdessalem Ben Abdelali EμE Laboratory University of MonastirMonastir 5000Tunisia Department of Networks and Communications University of Haute-AlsaceMulhouse 68100France ImViA Laboratory University of Burgundy Franche-ComtéDijon 21078France

In many applications of Wireless Sensor Networks(WSNs),event detection is the main purpose of ***,determining where and when that event occurs is crucial;thus,the positions of nodes must be ***,in a range-free case,the Distance Vector-Hop(DV-Hop)heuristic is the commonly used localization algorithm because of its simplicity and low *** DV-Hop algorithm consists of a set of reference nodes,namely,anchors,to periodically broadcast their current positions and assist nearby unknown nodes during *** potential solution includes the use of only one mobile anchor instead of these sets of *** solution presents a new challenge in the localization of rang-free WSNs because of its favorable results and reduced *** this paper,we propose an analytical probabilistic model for multi-hop distance estimation between mobile anchor nodes and unknown *** derive a non-linear analytic function that provides the relation between the hop counts and distance ***,based on the recursive least square algorithm,we present a new formulation of the original DV-Hop localization algorithm,namely,online DV-Hop localization,in ***,different scenarios of path planning and simulation results are conducted.

关键词： Wireless Sensor Networks(WSNs) mobile anchor online localization path planning

Several variants of the Dumont differential system and permutation statistics

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Science China Mathematics 2019年第10期62卷 2033-2052页

作者： Shi-Mei Ma toufik Mansour David GLWang Yeong-Nan Yeh School of Mathematics and Statistics Northeastern University at QinhuangdaoQinhuangdao066000 Department of Mathematics University of HaifaHaifa3498838 School of Mathematics and Statistics Beijing Institute of TechnologyBeijing102488 Institute of Mathematics Academia SinicaTaipei10617

The Dumont differential system on the Jacobi elliptic functions was introduced by Dumont(1979)and was extensively studied by Dumont, Viennot, Flajolet and so on. In this paper, we first present a labeling scheme for the cycle structure of permutations. We then introduce two types of Jacobi pairs of differential equations. We present a general method to derive the solutions of these differential equations. As applications,we present some characterizations for several permutation statistics.

关键词： Jacobi elliptic functions Dumont differential system permutation statistics context-free grammars

Mixed Convection of Bingham Fluid in a Two Sided Lid-Driven Cavity Heated From Below

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Fluid Dynamics & Materials Processing 2019年第2期15卷 107-123页

作者： toufik Benmalek Ferhat Souidi Mourad Moderres Bilal Yassad Said Abboudi Laboratoire de mécanique des fluides théorique et appliqué USTHBB.P.32El-AliaBab-Ezzouar16111 AlgerAlgérie Laboratory of Industrial Fluids Measurements and Applications(FIMA)UDBKM44225Ain DeflaAlgeria Laboratoire M3MUTBM 90010 Belfort CedexFrance

This study aims to analyze mixed convection in a square cavity with two moving vertical walls by finite volume *** cavity filled with Non-Newtonian fluid of Bingham model is heated from below and cooled by the other *** study has been conducted for certain parameters of Reynolds number(Re=1-100),Richardson number(Ri=1-20),Prandtl number(Pr=1-500),and Bingham number has been studied from 0 to *** results indicate that the increase in yield stress drops the heat transfer and the flow become flatter,while increasing Reynolds number augments *** convective transport is dominant when increasing Richardson number which leads to enhance heat transfer in the cavity for both Newtonian and Non-Newtonian fluid.A correlation of Nusselt number is given in function of different parameters.

关键词： Mixed convection heat transfer Bingham fluid lid-driven cavity

Even Signed Permutations Avoiding 2-Letter Signed Patterns

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Journal of Mathematical Research and Exposition 2009年第5期29卷 813-822页

作者： MANSOUR toufik SUN Yi Dong Department of Mathematics Haifa University Haifa 31905 Israel Department of Mathematics Dalian Maritime University Liaoning 116026 China

Let Dn be the set of all signed permutations on n = {1,...,n} with even signs,and let Dn(T) be the set of all signed permutations in Dn which avoids a set T of signed *** this paper,we find all the cardinalities of the sets Dn(T) where T■*** of the cardinalities encountered involve inverse binomial coefficients,binomial coefficients,Catalan numbers,and Fibonacci numbers.

关键词： forbidden pattern signed permutation Catalan number.