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Combined Effect of Dissipa.ion a.d Therma. Mixed Sta.e on Enta.glement in the Dispersive Limit

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Chinese Physics Letters 2008年第3期25卷 949-952页

作者： OBa.a.a. -S. F. HESSIa. H. a. mohamed a. -B. a. Fa.ulty of Science a.-a.ha. University Nasr City Cairo Egypt Fa.ulty of Science Assiut University Assiut Egypt

We investiga.e the enta.glement in the intera.ting system of a.single mode therma. field a.d a.single qubit with dissipa.ion in the dispersive limit. The influence of initia. tempera.ure of therma. field a.d a.oms on ... 详细信息

关键词： Ja.NES-CUMMINGS MODEL QUa.TUM-MECHa.ICS CURRENT SITUa.ION 2-LEVEL a.OM DECOHERENCE FIELD GENERa.ION DYNa.ICS ENTROPY a.PROXIMa.ION

Mixed sensitivity H_∞ control for LTI systems with va.ying time dela.s

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Journa. of Systems Engineering a.d Electronics 2018年第3期29卷 611-617页

作者： OULD mohamed mohamed va.l College of Computer a.d Informa.ion Sciences Al Jouf University

Designing a.robust controller for a.system with timeva.ying dela.s poses a.ma.or cha.lenge. In this pa.er, we propose a.method ba.ed on mixed sensitivity H∞ for the control of linea. time inva.ia.t（LTI） systems with va.ying time dela.s. The time dela. is a.sumed bounded a.d the upper bound is known. In the technique we propose, the dela. a.fecting the pla.t to be controlled is trea.ed a. a. unmodeled uncerta.nty（in form of multiplica.ive uncerta.nty）. Tha. uncerta.nty is a.proxima.ed a.d then a. H∞ba.ed controller, for the pla.t represented by the multiplica.ive uncerta.nty a.d the nomina. model, is ca.cula.ed. The obta.ned H∞controller is used to control the LTI systems with va.ying time dela.s. Simula.ion exa.ples a.e given to illustra.e the effectiveness of the proposed method.

关键词： linea. time inva.ia.t(LTI) systems mixed sensitivity H∞ va.ying time dela. unmodeled uncerta.nty H∞ control

Geochemica. cha.a.teristics a.d spectrometric prospecting in the muscovite-bea.ing pegma.ites a.d gra.ites, southea.tern a.wa., Egypt

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Chinese Journa. Of Geochemistry 2008年第1期27卷 9-20页

作者： Geha. M. Sa.eh mohamed M. El Galy mohamed a. Obeid Nuclea. Ma.eria.s a.thority P.O.Box: 530 El Maadi Cairo Egypt Geology Depa.t. Fa.ulty of Science El Fayoum University Egypt

Ra.e meta. minera.iza.ion of Sn, Nb-Ta.a.d W is encountered in the Gebel Dihmit a.ea.(GDa., south- ea.tern a.wa., Egypt. The minera.iza.ion is rela.ed to muscovite gra.ites a.d their pegma.ite deriva.ives. The peg- ma.ites a.e divided into three types a.cording to their ma.n minera. a.sembla.es: K-feldspa.-muscovite-tourma.ine, K-feldspa.-a.bite-muscovite a.d a.bite-K-feldspa.-lepidolite veins. Petrogenetic studies indica.e tha. Sn a.d Nb-Ta.minera.iza.ion extends from the la.e-ma.ma.ic sta.e to the pegma.ite a.d hydrotherma. sta.es of the (GDa. suite. The a.bite-K-feldspa.-lepidolite gra.ite is composed domina.tly of a.bite, lepidolote, a.d qua.tz, with topa., K-feldspa. a.d a.blygonite. The a.cessory minera.s a.e zircon, mona.ite, pollucite, columbite-ta.ta.ite, microlite a.d Ta.rich ca.siterite. Phenocrysts of qua.tz, topa. a.d K-feldspa. conta.n a.unda.t inclusions of a.bite la.hs a.d occa.iona. lepidolite crysta.s a.ong growth zones (snowba.l texture), indica.ing simulta.eous crysta.liza.ion from a.subsolvus, residua. ma.ma. The origin of the pegma.ites is a.tributed to extreme differentia.ion by fra.tiona. crysta.- liza.ion of a.gra.itic ma.ma. The economic potentia. for ra.e meta.s wa. eva.ua.ed in the geochemica. discrimina.ion dia.ra.s. a.cordingly, some of the pegma.ites a.e not only highly differentia.ed in terms of a.ka.is, but a.so the promising ta.gets for sma.l-sca.e Ta.a.d, to a.less extent, Sn. The pegma.ites a.so provide the first exa.ple of Fe-Mn a.d Nb-Ta.fra.tiona.ion in successive genera.ions of gra.ites to ca.siterite-bea.ing pegma.ites, which perfectly ex- hibit simila. fra.tiona.ion trends esta.lished for prima.y columbite-ta.ta.ite in the corresponding ca.egories of peg- ma.ites. Ura.ium a.d Th of ma.ma.ic origin a.e indica.ed by the presence of thorite a.d a.la.ite, wherea. evidence of hydrotherma. minera.iza.ion is the a.tera.ion of rock- foring minera.s such a. feldspa. a.d the forma.ion of sec- onda.y minera.s such a. ura.opha.e..

关键词：地理特征光谱测定法白云母岩石

Fixed-time Distributed Volta.e a.d Rea.tive Power Compensa.ion of Isla.ded Microgrids Using Sliding-mode a.d Multi-a.ent Consensus Design

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Journa. of Modern Power Systems a.d Clea. Energy 2022年第1期10卷 232-240页

作者： mohamed Gha.za.i mohamed Ha.oua.Foua. Giri Electrica. Engineering Depa.tment Mohammadia School of EngineersUniversity Mohammed VRabatMorocco Ca.n a.toma.ion La.ora.ory(La.) Caen Normandie University(UNICAEN)CaenFrance

This pa.er investiga.es a.fixed-time distributed volta.e a.d rea.tive power compensa.ion of isla.ded microgrids using sliding-mode a.d multi-a.ent consensus design.a.distributed sliding-mode control protocol is proposed to ensure volta.e regula.ion a.d reference tra.king before the desired preset fixed-time despite the unknown *** rea.tive power sha.ings a.ong distributed genera.ors a.e *** seconda.y controller is synthesized without the knowledge of a.y pa.a.eter of the *** is implemented using a.spa.se one-wa. communica.ion network modeled a. a.directed gra.h.a.compa.a.ive simula.ion study is conducted to highlight the performa.ce of the proposed control stra.egy in compa.ison with finite-time a.d a.ymptotic control systems with loa. power va.ia.ions.

关键词： Seconda.y controller microgrids rea.tive power control volta.e control

a.plica.ion of Modified Ba.a.se a. a.Biosorbent for Rea.tive Dyes Remova. from Industria. Wa.tewa.er

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Journa. of Wa.er Resource a.d Protection 2013年第7期5卷 10-17页

作者： a.d El-a.iz a. Sa.d a.ef a. M. aly mohamed M. a.d El-Wa.a. Solima. a. Solima. aly a. a.d El-Ha.ez V. Helmey mohamed N. Goda Chemistry Depa.tment Faculty of Science Assiut University Assiut Egypt Mecha.ica. Engineering Depa.tment Faculty of Engineering Assiut University Assiut Egypt

Propionic a.id modified ba.a.se wa. used for the remova. of rea.tive yellow 2 a.d rea.tive blue 4. The effects of pH, conta.t time, initia. dye concentra.ions, a.sorbent pa.ticle size a.d a.sorbent dose on the a.sorption of the two dyes were investiga.ed. a.ditiona.ly, the desorption process a.d intra.pa.ticle diffusion were studied. a.idic pH va.ues were fa.ora.le for a.sorption of both dyes. The equilibrium a.sorption da.a.were best fitted with the Freundlich isotherm for rea.tive yellow 2 a.d the La.gmiur isotherm for rea.tive blue 4. The va.ues of their corresponding consta.ts were determined. The kinetic for dye a.sorption is well described by a.pseudo-first order kinetic model for the rea.tive yellow 2 a.d by pseudo-second order for the rea.tive blue 4. The investiga.ion revea.ed tha. the hydroxyl groups of ba.a.se a.d the ca.boxylic group of propionic a.id pla. a.grea. role in the remova. of both rea.tive dyes.

关键词： Modified Ba.a.se Rea.tive Yellow 2 Rea.tive Blue 4 a.sorption Kinetics

Investiga.ing Double-Regime Crossover in Y1Ba.lt;sub>2Cu3 - xRxO7 - δSuperconductors

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Crysta. Structure Theory a.d a.plica.ions 2014年第1期3卷 30-37页

作者： mohamed H. Ba.r Lubna.M. Sha.a. El-Deen mohamed El-Hofy aly a. Ha.wa Physics Depa.tment Faculty of Science Minufiya University Shebin El-Koom Egypt

The effect of Pr a.d Gd doping on the tra.sport properties of Cu-deficient YBCO superconductors ha. been studied. Two series of Y1Ba.Cu3 - xRxO7 - δ, where R = Pr or Gd, were prepa.ed by the conventiona. solid-sta.e rea.tion technique. Resista.ce mea.urements showed a.suppression of Tc with increa.ing of Pr- a.d Gd-contents in a.dition to a.norma.-sta.e meta.-to-insula.or tra.sition. Moreover, a.superconductor-to-insula.or tra.sition ha. been observed a. a.bient pressure for tempera.ures less tha. 50 K for Pr with x = 0.3 a.d for Gd with x > 0.3. The overa.l complex beha.iours of the resistivity da.a.ha.e been prelimina.y expla.ned in terms of loca.iza.ion of cha.ge ca.riers, structura. disorders, a.d ma.netic ordering of ma.netic moments.

关键词： High Tc Superconductivity Meta.-Insula.or Tra.sition Superconductor-Insula.or Tra.sition

Rea.-time stereo ma.ching on CUDa.using Fourier descriptors a.d dyna.ic progra.ming

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Computa.iona. Visua. Media 2019年第1期5卷 59-71页

作者： mohamed Ha.lek Fethi Sma.h mohamed a.ri Fa.ulty of Sciences of Mona.tir Technologies et services de l'informa.ion

Computa.ion of stereoscopic depth a.d dispa.ity ma. extra.tion a.e dyna.ic resea.ch topics.a.la.ge va.iety of a.gorithms ha. been developed,a.ong which we cite fea.ure ma.ching, moment extra.tion, a.d ima.e representa.ion using descriptors to determine a.dispa.ity ma.. This pa.er proposes a.new method for stereo ma.ching ba.ed on Fourier descriptors. The robustness of these descriptors under photometric a.d geometric tra.sforma.ions provides a.better representa.ion of a.templa.e or a.loca. region in the ima.e. In our work, we specifica.ly use genera.ized Fourier descriptors to compute a.robust cost ***, a.box filter is a.plied for cost a.grega.ion to enforce a.smoothness constra.nt between neighboring pixels. Optimiza.ion a.d dispa.ity ca.cula.ion a.e done using dyna.ic progra.ming, with a.cost ba.ed on simila.ity between genera.ized Fourier descriptors using Euclidea. dista.ce. This loca. cost function is used to optimize correspondences. Our stereo ma.ching a.gorithm is eva.ua.ed using the Middlebury stereo benchma.k; our a.proa.h ha. been implemented on pa.a.lel high-performa.ce gra.hics ha.dwa.e using CUDa.to a.celera.e our a.gorithm, giving a.rea.-time implementa.ion.

关键词： genera.ized Fourier descriptors stereo ma.ching dyna.ic progra.ming CUDA

Cycliza.ion of 4,5-Dia.ino Pyra.ole Deriva.ives a.d Their a.tiba.teria. a.tivities

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Chinese Journa. of Chemistry 2011年第7期29卷 1451-1459页

作者： Rizk, Ha.a.F. EI-Ba.a.i, Ma.moud a. Ibra.im, Seha. a. EI-Bora., mohamed a. Depa.tment of Chemistry Faculty of Science Tanta University Tanta Egypt

a.convenient synthesis of intermedia.e 4,5-dia.ino-3-a.yl-l-phenylpyra.oles 4a.-4c wa. reported. The different cycliza.ion rea.tions were ca.ried out with cha.cone, 2-merca.toa.etic a.id a.d p-a.isia.dehyde, ethyl chloroforma.e, glyoxa. a.d thiourea.to a.ford different N a.d S conta.ning heterocycles. The rea.tion conditions were compa.ed by conventiona. hea.ing a.d microwa.e irra.ia.ion. The structures of the cycliza.ion products were de- termined by a.alytica. a.d spectroscopic da.a. a.l the synthesized compounds were screened for a.tiba.teria. a.tivities in vitro.

关键词： 4,5-dia.inopyra.ole cycliza.ion fused heterocyclic ring systems microwa.e chemistry a.tiba.teria. a.tivities

埃及东北地区夏季暴露尸体上常见嗜尸性昆虫种类的鉴定(英文)

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中南大学学报（医学版） 2013年第1期38卷 1-6页

作者： Sa.a. mohamed aly 文继舫王翔蔡继峰刘钦来钟鸣中南大学基础医学院法医学系长沙410013 苏伊士运河大学医学院法医学与临床毒理学系

目的:首次鉴定埃及东北地区(东经32°15'和北纬30°36')常见嗜尸性昆虫种类及记录其演替规律。方法:观察被置于一空地上的动物尸体在夏季60 d内的腐败过程,同时捕捉出现的昆虫及记录每日的环境温度(最高及最低温度)和相对湿度(RH)。利... 详细信息

目的:首次鉴定埃及东北地区(东经32°15'和北纬30°36')常见嗜尸性昆虫种类及记录其演替规律。方法:观察被置于一空地上的动物尸体在夏季60 d内的腐败过程,同时捕捉出现的昆虫及记录每日的环境温度(最高及最低温度)和相对湿度(RH)。利用已知嗜尸性昆虫鉴别要点对所收集的昆虫进行分类及鉴定。结果:在研究期间的最高和最低的环境温度的均值分别为34.85℃和29.2℃,相对湿度的均值为53.5%。尸体的腐败过程主要分为4个阶段:新鲜期、肿胀期、腐败期和干化期。收集到的昆虫大部分为双翅目、鞘翅目和膜翅目昆虫。经形态学鉴定双翅目包括四科昆虫(家蝇科、厕蝇科、丽蝇科和麻蝇科),鞘翅目包括两科昆虫(皮蠹科和阎魔虫科),膜翅目仅包括厨蚁属小黑蚁。结论:为进一步研究埃及地区不同季节的嗜尸性昆虫演替奠定了基础。

关键词：法医昆虫学演替腐败节肢动物种类鉴定