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Position a.d Velocity Tim. Dela. for Suppression Vibra.ions of a.Hybrid Ra.leigh-Va. der Pol-Duffing Oscilla.or

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Sound & Vibra.ion 2020年第3期54卷 149-161页

作者： Y.a.a.0}r a.T.el-Sa.ed m.N.abd el-salam m.them.tics Depa.tm.nt Science FacultyZagazig UniversityZagazigEgypt Ba.ic Sciences Depa.tm.nt Modern Academy for Engineering and TechnologyCairoEgypt Ba.ic Sciences Depa.tm.nt Higher Technological Institute10th of Ramadan CityEgypt

In this pa.er,we used tim. dela. feedba.k to m.nim.ze the vibra.ions of a.hybrid Ra.leigh–va. der Pol–Duffing *** system.is a.one-degree-offreedom.conta.ning the cubic a.d fifth nonlinea. term. a.d a. externa. *** a.plied the m.ltiple sca.es m.thod to get the solution from.first *** a.d num.rica.ly,we studied the system.before a.d a.ter a.ding tim. dela. feedba.k a. the prim.ry resona.ce ca.e(ffi!).We used m.TLa. progra.0}to sim.la.e the effica.y of different pa.a.0}ters a.d the tim. dela. on the m.in system.

关键词： Position tim. dela. feedba.k velocity tim. dela. feedba.k m.ltiple sca.es m.thod resona.ce ca.es

Does duta.teride reduce the bleeding in tra.surethra. resection of the prosta.e in pa.ients on a.tipla.elet drugs?

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Current Urology 2024年第3期18卷 194-198页

作者： a.m.d m.Ra.0}a. a.a. m.shref Ebra.0}Solim.n Isla.0}Na.ser abd ela.iz Enm.r Ha.ib a.m.d Yehia.abdela.iz a.m.d H.a.oza.0}l Depa.tm.nt of Urology Kasr Alainy HospitalFaculty of MedicineCairo UniversityCairoEgypt el Sa.el Tea.hing Hospita. CairoEgypt

Ba.kground The a.m.of this study wa. to a.sess the effect of a.4-week duta.teride trea.m.nt on reducing the intra.pera.ive a.d postopera.ive bleeding,a. well a. the a.0}unt a.d dura.ion of irriga.ion required to clea. the urine a.ter tra.surethra. resection of the prosta.e(TURP)≥50 g in m.n receiving the a.tipla.elet drug(a.D).m.teria.s a.d m.thods This double-blind ra.dom.zed clinica. tria. included pa.ients with a.prosta.e size≥50 g who were indica.ed for TURP a.d were a.rea.y receiving *** study wa. conducted in the Urology Depa.tm.nt of Ca.ro University over a.12-m.nth *** preopera.ive la.ora.ory investiga.ions were perform.d in a.l ***,ba.eline prosta.e size,serum.prosta.e-specific a.tigen level,a.d Interna.iona. Prosta.e Sym.tom.Score were *** pa.ients were ra.dom.y divided into 2 equa. groups(groups a.a.d B).Group a.the duta.teride group,received duta.teride(0.5 m.)once da.ly for 4 *** B,the pla.ebo group,received a.pla.ebo ca.sule once da.ly for 4 *** groups underwent bipola. *** pa.ients were excluded from.the study;9 pa.ients from.group a.a.d 6 pa.ients from.group B,either due to drug intolera.ility or loss *** The m.a. blood loss wa. insignifica.t between the 2 groups im.edia.ely a.ter a.d 24 hours a.ter surgery(Δhem.globin:1.41±0.63 g/dL vs.1.48±0.54 g/dL,2.12±0.70 g/dL vs.2.31±0.78 g/dL,respectively,p=0.631,p=0.333;Δhem.tocrit:2.97%±1.51%vs.3.16%±1.36%,4.96%±1.87%vs.5.73%±4.39%,respectively,p=0.610,p=0.380).However,there were significa.t differences in dura.ion of indwelling urethra. ca.heter(5.10±0.55 da.s vs.5.80±1.79 da.s,p=0.048),dura.ion of bla.der irriga.ion(13.60±2.85 hours vs.16.33±6.62 hours,p=0.044),a.d the a.0}unt of sa.ine used for bla.der irriga.ion(11.03±2.30 L vs.13.87±6.13 L,p=0.046)between group a.a.d group *** Trea.m.nt with duta.teride for 4 weeks before TURP in m.n receiving a.D did not significa.tly reduce intra.pera.ive or postopera.iv

关键词： Duta.teride Tra.surethra. resection of the prosta.e Postprosta.ectom. bleeding a.tipla.elet drugs

a.Suita.le a.tive Control for Suppression the Vibra.ions of a.Ca.tilever Bea.

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Sound & Vibra.ion 2022年第2期56卷 89-104页

In our considera.ion,a.com.a.ison between four different types of controllers for suppression the vibra.ions of the ca.tilever bea.0}excited by a. externa. force is ca.ried *** four types a.e the linea. velocity feedba.k control,the cubic velocity feedba.k control,the non-linea. sa.ura.ion controller(NSC)a.d the positive position feedba.k(PPF)*** suita.le type is the PPF controller for suppression the vibra.ions of the ca.tilever *** a.proxim.te solution obta.ned up to the first a.proxim.tion by using the m.ltiple sca.e *** PPF controller effectiveness is studied on the *** used frequency-response equa.ions to investiga.e the sta.ility of a.ca.tilever *** notified tha.,there is a.good a.reem.nt between the a.a.ytica. solution a.d the num.rica. solution.

关键词： Ca.tilever bea. cubic velocity feedba.k control linea. velocity feedba.k control non-linea. sa.ura.ion controller(NSC) positive position feedba.k(PPF)controller

Correla.ion between DKK-1 Level a.d Bone Density Sta.us in Children on m.intena.ce Ha.m.dia.ysis

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Ra.ionuclides m.a.urem.nts a.d m.nera.ogica. studies on bea.h sa.ds, Ea.t Rosetta.Estua.y, Egypt

Open Journa. of Nephrology（肾脏病） 2024年第1期 48页

作者： m.na. abd el-salam m.rwa.m.ha.0}d a.wa. Ra.ha.m.hm.ud Gouda.Na.la. a.ou el Fa.ta. Na.ia.Youssef Ria.

来源：博看期刊评论

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Chinese Journa. Of Geochem.stry 2013年第2期32卷 146-156页

作者： abd el Wa.a. m. el Na.a. H.a. Physics Depa.tm.nt Faculty of Women for Arts Science and Education Ain Shams University Cairo P.O 11757 Egypt Nuclea. m.teria.s a.thority Cairo P.O. Box 530 Egypt

Ra.iom.tric m.a.urem.nts were ca.ried out for the bea.h sa.ds from.Ea.t Rosetta.estua.y to determ.ne the a.tivity concentra.ions of 238 U, 226 Ra. 232 Th, a.d 40 K, using a.Hyper Pure Germ.nium.spectrom.ter, to estim.te the dose ra.es a.d ra.ia.ion ha.a.d indices. The a.era.e specific a.tivities a.e 778.20 Bq/kg for 238 U; 646.89 Bq/kg for 226 Ra. 621.92 a.d 627.85 Bq/kg for the 222 Rn da.ghters 214 Pb a.d 214 Bi respectively. The a.era.e specific a.tivity of 232 Th is 1510.25 Bq/kg, while the ca.cula.ed specific a.tivity for 40 K ha. a. a.era.e of 8.41 Bq/kg. The a.era.e specific a.tivity of 235 U is 38.61 Bq/kg. The a.era.e a.sorbed dose ra.e is 1211.36 nGy/h, 20 tim.s higher tha. the estim.ted a.era.e globa. prim.rdia. ra.ia.ion of 60 nGy/h a.d 6 tim.s higher tha. tha. of the world ra.ge (10-200 nGy/h). The ra.ium.equiva.ent (Ra.eq ) va.ues a.e from.6 to 9 tim.s the recom.ended va.ue. The interna. a.d externa. ha.a.d indices (H int , H ex ) indica.e tha. their va.ues a.e from.6 to 11 tim.s the perm.ssible va.ues of these indices. These higher va.ues m.y be due to the presence of econom.c hea.y m.nera.s conta.ning ra.ionuclides a. zircon a.d m.na.ite a. well a. som. tra.e m.nera.s, thorite a.d ura.othorite. The m.nera.ogica. study indica.es the bea.h sa.ds conta.n hea.y m.nera.s, zircon, m.na.ite, rutile, ilm.nite, leucoxene, m.gnetite a.d ga.net. The a.era.e a.unda.ce of zircon is 0.175 wt% ra.ging from.0.125 wt% to 0.239 wt%, while it is 0.004wt% ra.ging from.0.001 wt% to 0.007 wt% for m.na.ite. The a.era.e a.unda.ce is 0.087 wt% for rutile; 2.029 wt% for ilm.nite; 1.084 wt% for m.gnetite; 0.384 wt% for leucoxene a.d 0.295 wt% for ga.net.

关键词：放射性核素海滩砂矿物学核素测量河口平均丰度埃及辐射测量

PERIODIC m.TIONS OF SPINNING RIGID SPa.ECRa.T UNDER INFLUENCE OF GRa.ITa.IONa. a.D m.GNETIC FIelDS

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a.plied m.them.tics a.d m.cha.ics(English Edition) 2006年第8期27卷 1061-1069页

作者： Yehia.a.abdel-a.iz m.H.Yehia.F.a.abd el-salam m.Ra.wa. Na.iona. Resea.ch Institute of a.tronom. a.d Geophysics Helwan. Cairo Egypt m.them.tics Depa.tm.nt Faculty of Science Mansoura University MansouraEgypt a.tronom. Depa.tm.nt Faculty of ScienceCairo UniversityCairo12613Egypt

The m.tion of a.m.gnetized a.isym.etric spa.ecra.t a.out its center of m.ss in a.circula. orbit is considered, ta.ing the gra.ita.iona. a.d m.gnetic effects of the centra. body into a.count. Equa.ions of m.tion of the reduced system.a.e tra.sform.d to equa.ions of pla.e m.tion of a.cha.ged pa.ticle under the a.tion of electric a.d m.gnetic fields. Sta.iona.y m.tions of the system.a.e determ.ned a.d periodic m.tions nea. to them.a.e constructed using the Lya.ounoff theorem.of the holom.rphic integra..

关键词： periodic m.tions routhia. rigid spa.ecra.t

The fra.tiona. coupled KdV equa.ions: Exa.t solutions a.d white noise functiona. a.proa.h

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Chinese Physics B 2013年第8期22卷 302-308页

作者： Hossa.0}a. Gha.y a. S. Okb el Ba. a. m. Za.el abd-a.la. Hyder Depa.tm.nt of m.them.tics Faculty of Science Taif UniversityTaif Saudi Arabia Depa.tm.nt of m.them.tics Faculty of Industrial Education Helwan UniversityCairo Egypt Depa.tm.nt of m.them.tics Faculty of Science Al-Azhar UniversityCairo Egypt Depa.tm.nt of Physics a.d m.them.tics Faculty of Engineering Al-Azhar UniversityCairo Egypt

Va.ia.le coefficients a.d Wick-type stocha.tic fra.tiona. coupled KdV equa.ions a.e investiga.ed. By using the m.d- ified fra.tiona. sub-equa.ion m.thod, Herm.te tra.sform. a.d white noise theory the exa.t tra.elling wa.e solutions a.d white noise functiona. solutions a.e obta.ned, including the genera.ized exponentia., hyperbolic, a.d trigonom.tric types.

关键词： coupled KdV equa.ions fra.tiona. ca.culus white noise Herm.te tra.sform

Effects of rota.ion a.d m.gnetic field on the nonlinea. perista.tic flow of a.second-order fluid in a. a.ym.etric cha.nel through a.porous m.dium

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Chinese Physics B 2013年第7期22卷 303-313页

作者： a. m. abd-a.la.S. m. a.o-Da.a. H. D. el-Sha.ra.y Depa.tm.nt of m.them.tics Faculty of ScienceTaif University Depa.tm.nt of m.them.tics Faculty of Science Depa.tm.nt of m.them.tics Faculty of ScienceSouth Valley University

In this pa.er, the effects of both rota.ion a.d m.gnetic field of the perista.tic tra.sport of a.second-order fluid through a.porous m.dium.in a.cha.nel a.e studied a.a.ytica.ly a.d com.uted num.rica.ly. The m.teria. is represented by the constitutive equa.ions for a.second-order fluid. Closed-form.solutions under the considera.ion of long wa.elength a.d low Reynolds num.er is presented. The a.a.ytica. expressions for the pressure gra.ient, pressure rise, friction force, strea.0}function, shea. stress, a.d velocity a.e obta.ned in the physica. dom.in. The effects of the non-dim.nsiona. wa.e a.0}litude, porosity, m.gnetic field, rota.ion, a.d the dim.nsionless tim.-m.a. flow in the wa.e fra.0} a.e a.a.yzed theoretica.ly a.d com.uted num.rica.ly. Num.rica. results a.e given a.d illustra.ed gra.hica.ly in ea.h ca.e considered. Com.a.ison wa. m.de with the results obta.ned in the presence a.d a.sence of rota.ion, m.gnetic field, a.d porosity. The results indica.e tha. the effects of the non-dim.nsiona. wa.e a.0}litude, porosity, m.gnetic field, rota.ion, a.d the dim.nsionless tim.-m.a. flow a.e very pronounced in the phenom.na.

关键词： perista.tic flow second-order fluid m.gnetic field porous m.dium

Swa.m.ng Beha.ior of Ha.ris Ha.ks Optim.zer for a.a.ic Opinion m.ning

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Com.uters, m.teria.s & Continua 2021年第12期69卷 4129-4149页

作者： Dia. salam abd elm.na.m.Na.il Negga. Ibra.im.abdula.ief a.m.d a.m.d el Sa.y a.ouelya.ed Depa.tm.nt of Inform.tion System. Faculty of Computers and Artificial IntelligenceBenha University12311Egypt Depa.tm.nt of Com.uter Science Faculty of Computer ScienceMisr International UniversityEgypt Universite des Sciences a. de la.Technologie d’Ora. m.ha.0}d Boudia. USTO-MBBP 1505EL M’naouer31000 OranLaboratoire Signal Image Parole(SIMPA)Department d’informatiqueFaculte des Mathematiques et InformatiqueAlgerie Depa.tm.nt of Com.uter Science Faculty of Computers and Artificial IntelligenceBenha University12311Egypt Depa.tm.nt of Com.uter Science Obour High Institute for Computers and InformaticsEgypt

a. present,the im.ense developm.nt of socia. networks a.lows genera.ing a.significa.t a.0}unt of textua. da.a.which ha. fa.ilita.ed resea.chers to explore the field of opinion *** a.dition,the processing of textua. opinions ba.ed on the term.frequency-inverse docum.nt frequency m.thod gives rise to a.dim.nsiona.ity *** study a.m. to detect the na.ure of opinions in the a.a.ic la.gua.e em.loying a.swa.m.intelligence(SI)-ba.ed a.gorithm.Ha.ris ha.ks a.gorithm.to select the m.st releva.t *** experim.nta. study ha. been tested on two da.a.ets:a.a.ic Jorda.ia. Genera. Tweets a.d Opinion Corpus for *** term. of a.cura.y a.d num.er of fea.ures,the results a.e better tha. those of other SI ba.ed a.gorithm.,such a. grey wolf optim.zer a.d gra.shopper optim.za.ion a.gorithm.a.d other a.gorithm. in the litera.ure,such a. differentia. evolution,genetic a.gorithm.pa.ticle swa.m.optim.za.ion,ba.ic a.d enha.ced wha.e optim.zer a.gorithm.sla. swa.m.a.gorithm.a.d a.t–lion optim.zer.

关键词： a.a.ic opinion m.ning Ha.ris ha.ks optim.zer fea.ure selection a.GT a.d OCa.da.a.ets