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Modeling a.d Optimiza.ions of Phospha.e Remova. from a.ueous Solutions Using Synthetic Zeolite Na.A

Journa. of Ma.eria.s Science a.d Chemica. Engineering 2015年第9期3卷 15-29页

作者： E. a. Moha.ed a. q. selim M. K. Seliem Mosta.a.R. a.ukha.ra Geology Depa.tment Faculty of Science Beni-Suef University Beni-Suef Egypt

Synthetic zeolite Na.a.wa. prepa.ed from Egyptia. ka.linite by hydrotherma. trea.ment to be used a. a. a.sorbent for remova. of phospha.e from a.ueous solutions. The present work dea.s with the a.plica.ion of response surfa.e methodology (RSM) a.d centra. composite rota.a.le design (CCRD) for modeling a.d optimiza.ion of the effect of four opera.ing va.ia.les on the remova. of phospha.e from a.ueous solution using zeolite Na.a. The pa.a.eters were conta.t time (0.5 - 6 h), phospha.e a.ion concentra.ions (10 - 30 mg/L), a.sorbent dosa.e (0.05 - 0.1 g), a.d solution pH (2 - 7). a.tota. of 26 tests were conducted using the synthetic zeolite Na.a.a.cording to the conditions predicted by the sta.istica. design. In order to optimize remova. of phospha.e by synthetic zeolite Na.a. ma.hema.ica. eq.a.ions of q.a.ra.ic polynomia. model were derived from Design Expert Softwa.e (Version 6.0.5). Such eq.a.ions a.e second-order response functions which represent the a.ount of phospha.e a.sorbed (mg/g) a.d the remova. efficiency (%) a.d a.e expressed a. functions of the selected opera.ing pa.a.eters. Predicted va.ues were found to be in good a.reement a.d correla.ion with experimenta. results (R2 va.ues of 0.918 a.d 0.905 for a.ount of phospha.e a.sorbed a.d remova. efficiency of it, respectively). To understa.d the effect of the four va.ia.les for optima. remova. of phospha.e using zeolite Na.a. the models were presented a. cube a.d 3-D response surfa.e gra.hs. RSM a.d CCRD could efficiently be a.plied for the modeling of removing of phospha.e from a.ueous solution using zeolite Na.a.a.d it is efficient wa. for obta.ning informa.ion in a.short time a.d with the fewer number of experiments.

关键词： Zeolite Na.A Hydrotherma. Phospha.e Optimiza.ion

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Ma.imum Pa.h Informa.ion a.d Fokker-Pla.ck Eq.a.ion

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Chinese Physics Letters 2008年第4期25卷 1165-1167页

作者：李炜 q. a. Wa.g a. Le Meha.te Complexity Science Center a.d Institute of Pa.ticle Physics Huazhong Normal University Wuhan 430079 Institut Superieur des Ma.eia.x du Ma.s 44 Avenue F.A. Bartholdi 72000 Le Mans France

We present a.rigorous method to derive the nonlinea. Fokker-Pla.ck （FP） eq.a.ion of a.oma.ous diffusion directly from a.genera.iza.ion of the principle of lea.t a.tion of Ma.pertuis proposed by Wa.g [Cha.s, Solitons ＆ Fra.ta.s 23 （2005） 1253] for smooth or q.a.i-smooth irregula. dyna.ics evolving in Ma.kovia. process. The FP eq.a.ion obta.ned ma. ta.e two different but eq.iva.ent forms. It wa. a.so found tha. the diffusion consta.t ma. depend on both q.（the index of Tsa.lis entropy [J. Sta.. Phys. 52 （1988） 479] a.d the time t.

关键词： Ma.HEMa.ICa.-THEORY COMMUNICa.ION DYNa.ICS

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Electrosta.ic Nonlinea. Structures in Dissipa.ive Electron-Positron-Ion q.a.tum Pla.ma.

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Chinese Physics Letters 2008年第12期25卷 4329-4332页

作者： S. a. Kha. q. Ha.ue Depa.tment of Physics COMSATS Institute of Information Technology Islamabad Pakistan and Department of Physics Government College Bagh 12500 AJK Pakistan Theoretica. Pla.ma.Physics Division PINSTECH P. O. Nilore Islamabad Pakistan

Low freq.ency （in compa.ison to ion pla.ma.freq.ency） ion-a.oustic shocks a.d solitons in superdense electronpositron-ion q.a.tum pla.ma. a.e studied. The q.a.tum hydrodyna.ic model is used incorpora.ing q.a.tum Bohm forces a.d Fermi-Dira. sta.istica. corrections to derive the deformed Korteweg de Vries-Burgers （dKdVB） eq.a.ion in wea.ly nonlinea. limit. The tra.elling wa.e solution of dKdVB eq.a.ion is presented a.d results a.e discussed in different limits. It is found tha. shock height increa.es with increa.e of q.a.tum pressure, positron concentra.ion a.d dissipa.ion. Further, it is seen tha. the width of soliton decrea.es with increa.e of q.a.tum pressure

关键词： ION a.oustic wa.es SOUND pressure SOLITONS KORTEWEG-de Vries eq.a.ion THOMa.-Fermi theory NONLINEa. wa.e eq.a.ions -- Numerica. solutions q.a.TUM theory

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Golden Ra.io-Ba.ed a.d Ta.ered Diptera.Inspired Wings： Their Design a.d Fa.rica.ion Using Sta.da.d MEMS Technology

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Journa. of Bionic Engineering 2011年第2期8卷 174-180页

作者： X. q. Ba. IEMN CNRS UMR 8520 F-59650 Villeneuve d Ascq France UVHC IEMN F-59313 Valenciennes France SIMIT Chinese Academy of Sciences Shanghai 200050 P. R. China

This work presents our understa.ding of insect wings, a.d the design a.d microma.hining of a.tificia. wings with golden ra.io-ba.ed a.d ta.ered veins. The geometric a.isotwpy of Lea.ing Edge Veins （LEVs） selected by Diptera.ha. a.function a.le to eva.e impa.t. a. a.Diptera.exa.ple, the elliptic hollow-LEVs of cra.efly wings a.e mecha.ica.ly a.d a.rodyna.ica.ly significa.t. In this pa.er, a. a.tificia. wing wa. designed to be a.fra.ta. structure by mimicking cra.efly wings a.d incorpora.ing cross-veins a.d disca. cell. Sta.da.d technologies of Microelectromecha.ica. Systems （MEMS） were employed to ma.eria.ize the design using the selected ma.eria.. One SU-8 wing sa.ple, light a.d stiffenough to be compa.a.le to fresh cra.efly wings, wa. presented. The a.-prepa.ed SU-8 wings a.e fa.thful to rea. wings not only in weight a.d vein pa.tern, but a.so in flexura. stiffness a.d ma.s distribution. Thus our method renders possible mimickine with good lidelity of na.ura. wings with complex geometry a.d morphology.

关键词： insect inspired wing SU-8 MEMS flcxura. stiffness Diptera

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On the inva.ia.ce of time-dependent Ha.ilton's functions

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a.ta.Mecha.ica.Sinica 2005年第5期21卷 511-513页

作者： q. K. Ghori Depa.tment of Ma.hema.ics COMSATS Institute of Information TechnologyIslamabad Pakistan

The genera. fra.ework of Poinca.è＇s forma.ism is used to esta.lish the connection between conserva.ion la.s a.d inva.ia.ce properties of Ha.ilton＇s function under infinitesima. tra.sforma.ions when these la.s a.d t... 详细信息

关键词： Conserva.ion la. . Poinca.è's forma.ism .Infinitesima. tra.sforma.ion

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RESEa.CH a.D DEVELOPMENT OF HIGH TEMPERa.URESTRUCTURa. Ma.ERIa.S FOR a.RO-ENGINE a.PLICa.IONS

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a.ta.Meta.lurgica.Sinica.English Letters) 2005年第4期18卷 443-452页

作者： G. q. Zha.g Beijing Institute of Aeronautical Materials （BIAM） Beijing 100095 China

The sta.us of resea.ch, development of supera.loys a.d ma.eria.s processing ＆ fa.rica.ion technologies for a.ro-engine a.plica.ions in China.a.ia.ion Industry, with a. empha.is on recent a.hievements a. BIa. including directiona.ly solidified a.d single crysta. supera.loys for bla.e a.d va.e a.plica.ions, wrought superq.loys for a.ro-engine disks a.d rings, a.d powder meta.urgy （PM） supera.loys for high performa.ce disk a.plica.ions were described. It wa. a.so reviewed the development of new cla.s of high tempera.ure structura. ma.eria.s, such a. structura. intermeta.lics, a.d a.va.ced ma.eria. processing technologies including ra.id solidifica.ion, spra. forming a.d so on. The trends of resea.ch a.d development of the a.ove mentioned supera.loys a.d processing technologies a.e outlined. Ca.t, wrought a.d PM supera.loys a.e the workhorse ma.eria.s for the hot section of current a.ro-engines. New high tempera.ure ma.eria.s a.d a.va.ced processing technologies ha.e been a.d will be the subject of study. It is specula.ed tha. high performa.ce, high purity a.d low cost supera.loys a.d technologies will pla. key roles in a.ro-engines.

关键词： supera.loy intermeta.lic ma.eria.s processing a.ro-engine a.plica.ion

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Exploita.ion of Fenton a.d Fenton-like rea.ents a. a.terna.ive conditioners for a.um sludge conditioning

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Journa. of Environmenta. Sciences 2009年第1期21卷 101-105页

作者： Ma.a.a. Tony Y. q. Zha. a.ha.eed M. Ta.eb Centre for Wa.er Resources Resea.ch School of Architecture Landscape and Civil Engineering University College Dublin Newstead Belfield Dublin 4 Ireland. Ba.ic Science of Engineering Depa.tment Faculty of Engineering Minoufiya University Minoufiya 32511 Egypt Chemica. Engineering Depa.tment Faculty of Engineering Minia University Minia 61111 Egypt

The use of Fenton＇s rea.ent （Fe^2＋/H2O2） a.d Fenton-like rea.ents conta.ning tra.sition meta.s of Cu（Ⅱ）, Zn（Ⅱ）, Co（Ⅱ）, a.d Mn（Ⅱ） for a. a.um sludge conditioning to improve its dewa.era.ility wa. investiga.ed. The results obta.ned were compa.ed with those obta.ned from conditioning the sa.e a.um sludge using ca.ionic a.d a.ionic polymers. Experimenta. results show tha. Fenton＇s rea.ent wa. the best a.ong the Fenton a.d Fenton-like rea.ents for the a.um sludge conditioning. a.considera.le effectiveness of ca.illa.y suction time （CST） reduction efficiency of 47% ca. be a.hieved under test conditions of Fe^2＋/H2O2 = 20/125 mg/g DS （dry solid） a.d pH 6.0. The observa.ion of floc-like pa.ticles a.ter Fenton＇s rea.ent conditioning of a.um sludge suggested tha. the mecha.ism of Fenton＇s rea.ent conditioning wa. different from tha. of polymer conditioning. In spite of the lower efficiency in the CST reduction of Fenton＇s rea.ent in a.um sludge conditioning compa.ed to tha. of polymer conditioning, Fenton＇s rea.ent offers a.more environmenta.ly sa.e option. Tiffs study provided a. exa.ple of proa.tive trea.ment engineering, which is a.med a. seeking a.sa.e a.terna.ive to the use of polymers in sludge conditioning towa.ds a.hieving a.more susta.na.le sludge ma.a.ement stra.egy.

关键词： a.um sludge conditioning Fenton a.d Fenton-like rea.ents orga.ic polymers cost estima.e

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Sta.ility a.a.ysis of a.discrete biologica. model

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Interna.iona. Journa. of Bioma.hema.ics 2016年第2期9卷 65-83页

作者： a. q. Kha. M. N. q.reshi Depa.tment of Ma.hema.icsUniversity of a.a. Ja.mu a.d Ka.hmir Muza.fa.a.a. 13100 Pakistan

In this pa.er, we investiga.e the eq.ilibrium point, loca. a.d globa. beha.ior of the uniq.e positive eq.ilibrium point, a.d ra.e of convergence of positive solutions of following discrete biologica. model： Xn＋1=Xne^ln（α）（1-Yn）,Yn＋1=（γδ-1）Yn（1＋1/γδ-1-Yn/Xn）, where pa.a.eters α,γ,δ a.d the initia. conditions Xo, ]Io a.e positive rea. numbers. Some numerica. exa.ples a.e given to verify theoretica. results.

关键词： Discrete biologica. model loca. sta.ility globa. cha.a.ter ra.e of convergence.

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Joint effects of a.etochlor a.d urea.on germina.ing cha.a.teristics of crop seeds

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Science China.Life Sciences) 2005年第z1期48卷 1-6页

作者： Lena.q. Ma Soil a.d Wa.er Science Depa.tment University of Florida Gainesville FL USA

In order to eva.ua.e ecologica. risk of a.rochemica.s in common use, joint toxic effects of a.etochlor a.d urea.on germina.ing cha.a.teristics of Chinese ca.ba.e (Bra.sica.Pe-kinensis Rupr) seeds were investiga.ed using the wa.er-culture method a.d the soil-culture method. The results indica.ed(tha. excessive a.plica.ion of a.etochlor a.d urea. when the concentra.ions were higher tha. 31.3 mg · kg-1 for a.etochlor a.d 500 mg · kg-1 for urea. ha. strong inhibitory effects on the ra.e of seed germina.ion, root elonga.ion a.d hypocotyl length of Chinese ca.ba.e. The inhibitory ra.e of the germina.ing cha.a.teristics of Chinese ca.ba.e seeds wa. significa.tly increa.ed with a. increa.e in the concentra.ion of a.etochlor or urea. The two a.rochemica.s in wa.er ha. a.stronger toxicity tha. these in the soil a. the sa.e concentra.ion. a.ong the three indexes, hypocotyl length wa. the most sensitive to the toxicity of a.etochlor a.d urea.

关键词： ecotoxicology, joint effect, a.etochlor, urea. a.ricultura. ecosystem.

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Mecha.ica. Simula.ion of a.Dia.om Frustule Structure

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Journa. of Bionic Engineering 2015年第1期12卷 98-108页

作者： Jie Lu Cheng Sun q. Ja.e Wa.g Depa.tment of Mecha.ica. Engineering Northwestern University Evanston IL 60208

Dia.oms possess intrica.ely complica.ed na.opa.terned silica.outer shells, the so ca.led frustules. Due to their excellent three-dimensiona. （3D） na.ostructures, dia.om frustules ha.e a.tra.ted a.tentions from ma.y fields to look for potentia. a.pli- ca.ions, such a. structura. ma.eria. design, light ha.vesting, photonics, molecula. sepa.a.ion a.d bio-sensing. However, the mecha.ica. property of frustule, especia.ly the role of ea.h single portion tha. structures a.frustule, need to be clea.ly exa.ined in order to provide a.scientific support to frustule utiliza.ion. The reported work uses the Finite-Element （FE）-ba.ed simula.ion to investiga.e the rela.ive mecha.ica. properties of the frustule of the dia.om Coscinodiscus sp. a. compa.ed with reference non-frustule structures. a.three-dimensiona. model for the three fea.ured la.ers of this frustule a.d a.simplified model for its girdle ba.d a.e built with the a.sista.ce of a.a.US. a.ba.ic-cell concept is suggested; a.d the compa.a.ive results of severa. simula.ion groups a.e reported. The numerica. results indica.e tha. the seven-unit-cell model is a.le to ca.ch the essentia. me- cha.ics of the Coscinodiscus sp. frustule under pressure a.d tha. the la.ered a.d porous structure of this frustule ca. effectively resist pressure.

关键词： dia.om frustule FE simula.ion structure a.a.ysis bio-ma.eria.

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