检索结果-南通市图书馆

Chinese Journal of Chemical Engineering 2016年第2期24卷 317-322页

作者： Salah Zouaoui hassane djebouri Kamal Mohammedi Sofiane Khelladi Aomar Ait Aidelr LMSE Laboratory Mouloud Mammeri University of Tizi-OuzouP.O.Box 17 RPI 5000Algeria LEMI Laboratory MESO M'Hamed Bougara University of Boumerdes35000Algeria DynFluid Laboratory Arts et Metiers Paris Tech151 boulevard de PHOpital75013 ParisFrance

This paper presents an experimental study of the physical characteristic effects of large particles on hydraulic transport in a horizontal *** particles are spherical and are large with respect to the diameter of the pipe(8%,10%,16% and 25%).Experiments were done to test the important parameters in solid transport(pressure,velocity,etc.).As a result,the relationship between the pressure gradient forces and the mixture velocity was substantially different from the pure liquid ***,in a single-phase flow a monotonous behavior of the pressure drop curve is observed,and the curve of the solid particle flow attains its minimum at the critical *** regimes are characterized with differential pressure measurements and visualizations.

关键词： Solid transport Two-phase flow Hydraulic gradient Flow regime

Extension of i-Modularity

在线全文

学校读者我要写书评

暂无评论

Algebra Colloquium 2020年第3期27卷 483-494页

作者： El hassane Fliouet Regional Center for the Professions of Education and Training AgadirMorocco

Let k be a field of characteristic p≠*** main purpose of this paper is to extend the results and definitions of i-modularity that have already been estalished by Chellali and the present author when[k:k^(P)]is finite to the case of finite irrationality degree extensions.A number of properties of i-modular extensions are determined and examples are presented illustrating the *** particular,we characterize some special cases.

关键词： purely inseparable q-finite extension lq-modular extension i-modular extension e-closed extension

Jacobson's Lemma for Generalized Drazin–Riesz Inverses

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2023年第3期39卷 481-496页

作者： Soufiane HADJI hassane ZGUITTI Department of Mathematics Dhar El Mahraz Faculty of ScienceSidi Mohamed Ben Abdellah UniversityP.O.Box 1796 Fes-Atlas30003 Fez Morocco

For bounded linear operators A,B,C and D on a Banach space X,we show that if BAC=BDB and CDB=CAC then I-AC is generalized Drazin-Riesz invertible if and only if I-BD is generalized Drazin-Riesz invertible,which gives a positive answer to Question 4.9 in Yan,Zeng and Zhu[Complex *** 14,Paper No.12(2020)].In particular,we show that Jacobson’s lemma holds for generalized Drazin-Riesz inverses.

关键词： Jacobson's lemma Drazin inverse generalized Drazin-Riesz inverse

Optimization of Correspondence Times in Bus Network Zones, Modeling and Resolution by the Multi-agent Approach

在线全文

学校读者我要写书评

暂无评论

Journal of the Operations Research Society of China 2020年第3期8卷 415-436页

作者： Elbaz hassane Elhilali Alaoui Ahmed Modeling and Scientific Computing Laboratory Faculty of Science and TechnologyFezMorocco Euromed University FezMorocco

Urban transportation,especially bus transportation,is an important sign of development in every city in the *** average waiting time for passengers at correspondence stations of buses is one of the most important measures of effectiveness of bus *** the best of our knowledge,the studies in the literature are about maximizing the number of synchronizations in those correspondence stations whose objective is to minimize the waiting time in the *** classical definition of synchronization used in the literature related to a time *** this work,we introduce a new definition of synchronization of two buses in network *** this context,we present a mathematical formulation of the synchronization bus timetabling problem as a multi-objective program,where we use the new meaning for synchronization of two buses in the network *** the problem is NP-hard,we adapt a multi-agent approach to solve *** experiments show that after adapting the multi-agent approach using our proposed definition,we obtain high-quality solutions compared to the classical definition.

关键词： Multi-objective problem Bus transportation Network zones Multi-agent approach Synchronization

Investigation of the fluid flow in an isolated rotor-stator system with a peripheral opening

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2013年第4期56卷 745-754页

作者： DEBUCHY Roger ABDEL NOUR Fadi NAJI hassane BOIS Gérard Laboratoire Génie Civil & géo-Environnement (LGCgE- EA 4515) UArtois/FSA Béthune F-62400 Béthune France Université Lille Nord de France F-59000 Lille France Damascus University Department of Water Engineering Damascus Syria LML-PRES Lille Nord de France Arts et Métiers ParisTech Lille France

This paper deals with an experimental, theoretical and numerical study of a turbulent flow with separated boundary layers between a rotor and a stator. The system is not subjected to any superimposed radial flow. The periphery of the cavity is opened to the atmosphere so that the solid body rotation for infinite discs is not always observed. Emphasis was placed on develop- ment of an asymptotic approach and a step-by-step method to compute the radial distribution of the core swirl ratio and the static pressure on the stator side. The theory also includes the radial and axial velocities in the core region. The numerical simulation has been conducted with the commercial CFD code Fluent 6.1. The k- SST turbulence model is used, with the assumption of 2D-axisymmetric and steady flow. CFD validations have been performed by comparison of the numerical results with the corresponding theoretical results. Numerical and experimental results are in good agreement with analytical solutions.

关键词： rotor-stator cavity analytical solution numerical simulations k- SST turbulence model

Entropy and Renormalized Solutions for Nonlinear Elliptic Problem Involving Variable Exponent and Measure Data

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2015年第1期31卷 151-169页

作者： Mohamed Badr BENBOUBKER Houssam CHRAYTEH Mostafa EL MOUMNI hassane HJIAJ National School of Applied Sciences Abdelmalek Essaadi University Beirut Arab University Faculty of ScienceDepartment of Mathematics and Computer Science Laboratory LAMA Faculty of Sciences Dhar El MahrazSidi Mohamed Ben Abdellah University

We give an existence result of entropy and renormalized solutions for strongly nonlinear elliptic equations in the framework of Sobolev spaces with variable exponents of the type： -div （a（x, u,▽u）＋φ（u））＋g（x, u,▽u）=μ, where the right-hand side belongs to L^1（Ω）＋W^-1,p＇（x）（Ω）, -div（a（x, u,▽u）） is a Leray-Lions operator defined from W^-1,p＇（x）（Ω） into its dual and φ∈C^0（R,R^N）. The function g（x, u,▽u） is a non linear lower order term with natural growth with respect to ｜▽u｜ satisfying the sign condition, that is, g（x, u,▽u）u ≥ 0.

关键词： Nonlinear elliptic problem Sobolev spaces variable exponent entropy solution renormalized solution measure data

CONTROLLABILITY OF NEUTRAL FUNCTIONAL DIFFERENTIAL EQUATIONS WITH INFINITE DELAY

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Scientia 2011年第1期31卷 73-80页

作者： Bouzahir hassane 傅显隆 Faculty of Engineering Al Hosn University P.O. Box 38772 Abu Dhabi UAE On leave from ERMAGIM ENSA BP 1136 Agadir Morocco Department of Mathematics East China Normal University

In this article, we give sufficient conditions for controllability of some partial neutral functional differential equations with infinite delay. We suppose that the linear part is not necessarily densely defined but satisfies the resolvent estimates of the Hille-Yosida theorem. The results are obtained using the integrated semigroups theory. An application is given to illustrate our abstract result.

关键词： Controllability integrated semigroup integral solution infinity delay

Evaluation of protective effect of cactus pear seed oil(Opuntia ficusincida L. MILL.) against alloxan-induced diabetes in mice

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2015年第7期8卷 530-535页

作者： Berraaouan Ali Ziyyat Abderrahim Mekhfi hassane Legssyer Abdelkhaleq Aziz Mohammed Bnouham Mohamed Laboratory of Physiology and Ethnopharmacology-URAC40 Mohammed First UniversityFaculty of Sciences

Objective: To evaluate the in vitro antioxidant power of cactus pear seed oil [Opuntia ficusincida L. MILL.(CPSO)] and its protective effect against chemically induced diabetes mellitus in mice. Methods: The in vitro antioxidant effect of CPSO was evaluated using 2,2-diphenyl-1-picrylhydrazyl(DPPH) scavenging assay. The preventive effect was conducted on Swiss albino mice treated with CPSO(2 m L/kg, per os), before and after a single intraperitoneal alloxan administration(100 mg/kg). Survival rate, body weight and fasting blood glucose were measured and histopathological analysis of pancreas was performed to evaluate alloxaninduced tissue injuries. Results: CPSO exhibited an antioxidant effect in DPPH scavenging assay. Moreover, the administration of CPSO(2 m L/kg) significantly attenuated alloxaninduced death and hyperglycemia(P<0.001) in treated mice. Morphometric study of pancreas revealed that CPSO significantly protected islets of langerhans against alloxan induced-tissue alterations. Conclusions: Based on theses results, CPSO can prevent alloxan-induced-diabetes by quenching free radicals produced by alloxan and inhibiting tissue injuries in pancreatic β-cells.

关键词： Antioxidant effect Alloxan prevention Cactus pear seed oil Diabetes mellitus Opuntia ficus-indica Oxidative stress

Contribution of Geophysical Prospecting(Geoelectrical Method) for the Hydrogeological Reconnaissance of the Region of Ouled Youssef(Tadla's Basin,Morocco)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

地学前缘 2009年第S1期16卷 130-131页

作者： Sanaa el Batali hassane Sahbi Ali Essahlaoui Mustapha Boualoul Geological Engineering Laboratory Faculty of Sciences

The Turonian aquifer of the Tadla’s basin shows at present a pronounced reduction of its hydraulic potential linked to overexploitation and deficiency of effective *** order to make an evaluation of the resources of ... 详细信息

关键词： Morocco Tadla’s basin climatology geoelectrical method Turonian aquifer isoresistivity geoelectric sections exploitation’s drillings

COMPARISON OF FRESH AND HARDENED PROPERTIES OF SELF-COMPACTING CONCRETE MIXTURE FROM DIFFERENT ASPECT RATIO OF STEEL FIBER VIEW POINT

在线全文

学校读者我要写书评

暂无评论

Journal of Green Building 2021年第1期16卷 115-138页

作者： hassane Amidou Ouedraogo SüleymanÖzen Veysel Kobya Serkan Sagiroglu Ali Mardani-Aghabaglou Department of Civil Engineering Eng.FacultyBursa UludağUniversityNilüfer-BursaTurkey

Self-compacting concrete(SCC)is a type of concrete which is frequently preferred in different applications due to its advantages such as its fluidity and transition in tight openings between steel reinforcing ***,it is vital that SCC maintains its fresh state characteristics when its transportation phase is taken into *** reinforced in SCC affects the properties of fresh concrete negatively while it had a positive effect on its dynamic *** this study,the effect of steel fibers having different aspect ratios on the time dependent fresh properties and mechani-cal properties of self-compacting concrete mixtures was *** addition to the control mixture without fiber,in the mixtures containing fiber,three different twin-hook steel fibers with aspect ratios of 54,64 and 50 were used as 0.6%of total *** all of the SCC mixtures,the water/cement ratio,cement dosage and slump-flow value were kept *** time dependent rheological properties of the mixtures were *** compressive,split-tensile and flexural strengths as well as fracture energy,the load deflection relation under flexural load and load-crack opening displacement,modulus of elasticity of SCC mixtures were also ***,the water absorption capacity and depth of penetration of water under pressure of mixtures were *** the basis of the results,the fiber utilization and its aspect ratio had no significant effect on compressive strength and modulus of elasticity of the SCC *** split-tensile,flexural strengths and fracture energy of SCC mixtures increased by using fiber;the permeability properties of SCC mixture increased by fiber utilization.

关键词： self consolidating concrete steel fiber aspect ratio fresh state properties mechanical properties.