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Na.ura. Science 2010年第9期2卷 1035-1043页

作者： samir a. abdellatif Yousry M. Issa 不详

Complexes derived from some 1Phenyl3meth yl4nitroso5pyra.olone (L1), 1,3diphenyl4 nitroso5pyra.olone (L2) a.d 1phenyl3a.ilino 4nitroso5pyra.olone (L3) with Mn2+, Co2+, Ni2+, Cu2+ a.d Zn2+ meta. ions ha.e been prepa.ed. Structura. investiga.ion of the liga.ds a.d their complexes ha. been ma.e ba.ed on elementa. a.a.ysis, infra.ed (FTIR), ultra.iolet a.d visible spectra.(UVVis.), proton nuclea. ma.netic reso na.ce (1H NMR), ma.netic susceptibility (?eff.) a.d therma. a.a.ysis (TG a.d DTG). The effect of solvents ha. been ca.ried out in orga.ic solvents of va.ying pola.ity. The observed tra.sition energy a.d oscilla.or strengths were a.so ca.cula.ed. The da.a.obta.ned show tha. a.l of the prepa.ed complexes conta.n wa.er molecules in their coordina.ion sphere. The investiga.ed liga.ds a.ts a. neutra. bidenta.e liga.ds bonded to the meta. ions through the two oxygen a.oms of the ca.bonyl a.d nitroso groups. The isola.ed complexes beha.e a. nonelectro lyte in DMF solution. The Mn2+, Co2+, Ni2+ a.d Cu2+ complexes show high spin configura.ions a. the ground sta.e. The high spin va.ues of ma.gnetic susceptibility ma. be due to the liga.ds being wea. liga.ds. The Mn2+, Co2+, Ni2+, Cu2+ a.d Zn2+ complexes exhibit a. octa.edra. or distorted octa.edra. coordina.ion with the investiga.ed liga.ds.

关键词： Nitrosopyra.olones Tra.sition Meta. Complexes Spectroscopic Therma. Ma.netic studies

Potentiometric, spectrophotometric, conductimetric a.d thermodyna.ic studies on some tra.sition meta. complexes derived from 3-methyl-1-phenyl- a.d 1, 3-diphenyl-4-a.yla.o-5-pyra.olones

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Na.ura. Science 2010年第8期2卷 793-802页

作者： samir a. abdellatif Sa.er E. Ma.sour a.dulra.ma. a. Fa.ouh 不详

a.new 3methyl1phenyl4a.yla.o5pyra.olone a.d 1, 3diphenyl4a.yla.o5pyra.olone ha.e been synthesized a.d cha.a.terized by elementa. a.a.ysis, IR, ma.s a.d 1H NMR spectra. The a.id dissocia.ion consta.ts (pKa.va.ues) of the investiga.ed liga.ds were determined potentiometrica.ly a.d spectrophotometrica.ly. The sta.ility consta.ts of the tra.sition meta. ions (VO2+, Cr3+, Mn2+, Co2+, Ni2+, Cu2+ a.d Zn2+) with the investiga.ed liga.ds were determined potentiometrica.ly a. different ionic strengths (0.167, 0.1, 0.05 a.d 0.025 M) Na.l a. 25oC a.d different tempera.ure (25, 30, 35, a.d 45oC). The va.ues of sta.ility consta.ts were found to decrea.e with increa.ing ionic strengths a.d tempera.ure. The stoichiometries were studied using spectrophotometric a.d conductimetric methods, the results indica.e the existence of 1:1 a.d 1:2 (M:L) meta.:liga.d species. The rela.ionships between the sta.ility consta.ts of the complexes, ioniza.ion consta.ts of the liga.ds ha.e been discussed a.d correla.ed. The thermodyna.ic pa.a.eters (?G, ?H a.d ?S) a.d the thermodyna.ic sta.ility consta.ts for a.l of the investiga.ed complexes were determined potentiometrica.ly.

关键词： a.opyra.olones Loniza.ion Consta.ts Sta.ility Consta.ts Thermodyna.ic Pa.a.eters Tra.sition Meta. Complexes Potentiometry Spectrophotometry

ON HYPERSTa.ILITY OF THE BIa.DITIVE FUNCTIONa. EQUa.ION

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a.ta.Ma.hema.ica.Scientia 2017年第6期37卷 1727-1739页

作者： Iz-iddine EL-Fa.SI Ja.usz BRZDEK abdellatif CHa.BI samir Ka.Ba. Depa.tment of Ma.hema.ics Faculty of SciencesIbn Tofail UniversityBP 133KenitraMorocco Depa.tment of Ma.hema.ics Pedagogical UniversityPodchorazych 230-084 KrakowPoland

We present results on a.proxima.e solutions to the bia.ditive equa.ionf（x＋y,z-w）＋f（x-y,z＋w）=2f（x,z）-2f（y,w）on a.restricted doma.n. The proof is ba.ed on a.quite recent fixed point theorem in some function spa.es. Our ma.n results sta.e tha., under some wea. na.ura. a.sumptions, functions sa.isfying the equa.ion a.proxima.ely （in some sense） must be a.tua.ly solutions to it. In this wa. we obta.n inequa.ities cha.a.terizing bia.ditive ma.pings a.d inner product spa.es. Our outcomes a.e connected with the well known issues of Ula. sta.ility a.d hypersta.ility.

关键词： hypersta.ility Ula. sta.ility bia.ditive functiona. equa.ion fixed point the-orem cha.a.teriza.ion of inner product spa.e

Sta.iliza.ion a.d Synchroniza.ion of Discrete-time Fra.tiona. Cha.tic Systems with Non-identica. Dimensions

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a.ta.Ma.hema.ica. a.plica.a. Sinica 2021年第3期37卷 523-538页

作者： samir BENDOUKHA Depa.tment of Electrica. Engineering College of EngineeringYanbuTaibah UniversitySaudi Arabia

This pa.er investiga.es the sta.iliza.ion a.d synchroniza.ion of two fra.tiona. cha.tic ma.s proposed recently,na.ely the 2D fra.tiona. Hénon ma. a.d the 3D fra.tiona. genera.ized Hénon *** show tha. a.though these ma.s ha.e non–identica. dimensions,their synchroniza.ion is still *** proposed controllers a.e eva.ua.ed experimenta.ly in the ca.e of non–identica. orders or time–va.ying *** methods a.e used to illustra.e the results.

关键词： discrete cha.s fra.tiona. discrete ca.culus Hénon ba.ed ma.s sta.iliza.ion synchroniza.ion

DUa.ITY OF GENERa.IZED DUNKL-LIPSCHITZ SPa.ES

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a.ta.Ma.hema.ica.Scientia 2017年第6期37卷 1567-1593页

作者： samir Ka.LEL Depa.tment of Ma.hema.ics Higher Institute of Computer Sciences and Mathematics of MonastirMonastir University5000 MonastirTunisia

a.stra.t The a.m of this pa.er is to prove dua.ity a.d reflexivity of genera.ized Lipschitz spa.es ∧κα,p,q（R）, α ∈R a.d 1≤〈 p, q ≤∞, in the context of Dunkl ha.monic a.a.ysis.

关键词： Dunkl opera.or dua.ity Herz spa.es hea. tra.sform Dunkl tra.sform gen-era.ized Dunkl-Lipschitz spa.es

Sna.through response of a. innova.ive symmetric bista.le composite wing

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a.ta.Mecha.ica.Sinica 2024年第9期40卷 68-82页

作者： Sa.a.Hija.i samir Ema. Depa.tment of Mecha.ica. Engineering American University of SharjahSharjah PO Box 26666United Arab Emirates

This study presents a.numerica. investiga.ion into the equilibrium sha.es a.d sna.through response of a. innova.ive bista.le symmetric composite *** proposed design is a.compound pla.e tha. consists of a.symmetric fla. pla.form followed by a.winglet tha. utilizes the modified hybrid bista.le symmetric la.ina.e recently developed in the *** hybrid la.up of the winglet resolves the issue of losing the bista.ility of the unsymmetric la.ina.e when a.ta.hed to a.other *** a.proxima.e a.a.ytica. model ba.ed on the Ra.leigh-Ritz method is developed for the compound pla.e tha. considers the geometric nonlinea.ity,the cla.ping conditions a. the wing root,a.d the compa.ibility conditions a. the *** sta.ic equilibrium positions predicted by the model were verified a.a.nst the a.a.US finite element(FE)results a.d a. excellent a.reement wa. *** influence of the geometrica. a.d ma.eria. pa.a.eters of the proposed design on the sta.ic equilibrium sha.es a.d the sna.through response wa. *** following pa.a.eters were considered:the length ra.io of the fla. pla.e to the bista.le winglet,the thickness a.d loca.ion of the bidirectiona. gla.s epoxy la.ers,the loa. loca.ion,a.d the wing’s ta.erness a.d a.pect *** pa.a.eters were found significa.t,a.d their effects were *** novelty of this work is tha. it presents the equilibrium sha.es a.d the sna.through response of a.bista.le la.ina.e a. a.pa.t of a.bigger complia.t structure,which mimics the scena.io in rea.-life a.plica.ions.

关键词： Compound la.ina.e Bista.le wing Hybrid symmetric la.ina.es Sna.through

The effects of exha.st a.r vent loca.ion on therma. comfort inside a.residentia. building equipped with a. eva.ora.ive cooling system

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Building Simula.ion 2021年第4期14卷 1063-1075页

作者： rmin Sa.a.i samir Fa.id Mouja.s Depa.tment of Mecha.ica. Engineering College of EngineeringUniversity of Nevada Las VegasLas VegasNV89154USA

The loca.ion of exha.st a.r vents of a. eva.ora.ive cooling system ca. ha.e significa.t effects on providing therma. comfort a.d controlling humidity, tempera.ure a.d a.r distribution in buildings. In the current study, four different stra.egies ha.e been eva.ua.ed for exha.st a.r vent loca.ions to provide the optimum therma. comfort inside a.typica. residentia. house. This study provides a.numerica. solution for tempera.ure a.d rela.ive humidity profiles in the residentia. house a.d within the living spa.e in ea.h room typica.ly a. a.height of 1.8 m or less. By eva.ua.ing different exha.st a.r vent loca.ions in a.room, the best stra.egy(ies) to provide more a.propria.e therma. comfort condition a.d obta.ned a.d a. a.conclusion, the exha.st vents should be loca.ed on furthest wa.l a.a. from the entra.ce of the room a.d in the middle. The results provided in the current study ca. eventua.ly be a.plied in the design of eva.ora.ive cooler exha.st vent systems in residentia. buildings a.d lea. to improve the performa.ce of these systems.

关键词： therma. comfort CFD eva.ora.ive cooling system exha.st a.r vents

Finite Elementθ-Schemes for the a.oustic Wa.e Equa.ion

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a.va.ces in a.plied Ma.hema.ics a.d Mecha.ics 2011年第2期3卷 181-203页

作者： samir Ka.a. Depa.tment of Ma.hema.ics a.d Sta.istics Sultan Qaboos UniversityP.O.Box 36Al-Khod 123MuscatSultanate of Oman

In this pa.er,we investiga.e the sta.ility a.d convergence of a.fa.ily of implicit finite difference schemes in time a.d Ga.erkin finite element methods in spa.e for the numerica. solution of the a.oustic wa.e *** schemes cover the cla.sica. explicit second-order lea.frog scheme a.d the fourth-order a.cura.e scheme in time obta.ned by the modified equa.ion *** derive genera. sta.bility conditions for the fa.ily of implicit schemes covering some well-known CFL *** error estima.es a.e *** sufficiently smooth solutions,we demonstra.e tha. the ma.ima. error in the L^(2)-norm error over a.finite time interva. converges optima.ly a. O(h^(p+1)+∆t^(s)),where p denotes the polynomia. degree,s=2 or 4,h the mesh size,a.d∆t the time step.

关键词： Finite element methods discontinuous Ga.erkin methods wa.e equa.ion implicit methods energy method sta.ility condition optima. error estima.es

Simula.ion a.d a.a.ysis of resin flow in injection ma.hine screw

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Journa. of Zhejia.g University-Science a.a.plied Physics & Engineering) 2008年第3期9卷 338-345页

作者： Ling-feng LI samir MEKID College of Mecha.ica. a.d Energy Engineering Zhejiang University Hangzhou 310027 China School of Mecha.ica. Aerospace and Civil Engineering University of Manchester Manchester UK

a.method with simula.ion a.d a.a.ysis of the resin flow in a.screw is presented to ea.e the control of some problems tha. ma. a.fect the efficiency a.d the qua.ity of the product a.ong existing screws in a. injection ma.hine. The physica. model of a.screw is esta.lished to represent the stress, the stra.n, the rela.ionship between velocity a.d stress, a.d the tempera.ure of the cells. In this pa.er, a.working ca.e is considered where the velocity a.d the tempera.ure distributions a. a.y section of the flow a.e obta.ned. The a.a.ysis of the computa.iona. results shows a. a.ility to ma.ter va.ious pa.a.eters depending on the specifica.ions.

关键词： Screw Pla.ticity Velocity distribution Tempera.ure distribution

BEZIER SPLINES INTERPOLa.ION ON STIEFEL a.D GRa.SMa.N Ma.IFOLDS

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Journa. of Computa.iona. Ma.hema.ics 2024年第6期42卷 1554-1578页

作者： Ines a.oua.i Cha.ik samir Depa.tment of Ma.hema.ics University of SousseTunisia LIMOS-CNRS University of Clermont AuvergneFrance

We propose a.new method for smoothly interpola.ing a.given set of da.a.points on Gra.sma.n a.d Stiefel ma.ifolds using a.genera.iza.ion of the De Ca.telja. *** tha. end,we reduce interpola.ion problem to the cla.sica. Euclidea. setting,a.lowing us to directly levera.e the extensive toolbox of spline *** interpola.ed curve enjoy a.number of nice properties:The solution exists a.d is optima. in ma.y common *** a.plica.ions,the structures with respect to chosen Riema.nia. metrics a.e deta.led resulting in a.ditiona. computa.iona. a.va.ta.es.

关键词： Optimiza.ion B´ezier spline Curve fitting Gra.sma.n ma.ifolds Stiefel ma.ifolds Ca.onica. metrics