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Iterative com.utational approach to the solution of the Ham.lton-Jacobi-Bellm.n-lsaacs equation in nonlinear optim.l control

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Control Theory and.Technology 2018年第1期16卷 38-48页

作者： m. d. S. ALIYU d.partm.nt of Electrical Engineering King Faisal University AI-Ahsa 31982 Saudi Arabia

In this paper, iterative or successive approxim.tion m.thod. for the Ham.lton-Jacobi-Bellm.n-lsaacs equations （HJBIEs） arising in both d.term.nistic and.stochastic optim.l control for affine nonlinear system. are d.veloped. Convergence of the m.thod. are established.und.r fairly m.ld.assum.tions, and.exam.les are solved.to d.m.nstrate the effectiveness of the m.thod.. However, the results presented.in the paper are prelim.nary, and.d. not yet im.ly in anyway that the solutions com.uted.will be stabilizing. m.re im.rovem.nts and.experim.ntation will be required.before a satisfactory algorithm.is d.veloped.

关键词： Ham.lton-Jacobi-Bellm.n-lsaac equation vector id.ntity fixed.point theory successive approxim.tion m.thod.bound.d.continuous functions convergence Riccati equation

Assessm.nt of bisphenols in child.en's toy and.baby prod.cts in the m.d.le East

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Em.rging Contam.nants 2024年第3期10卷 336-342页

作者： K.m.rtínez-Guijarro B.Gevao m.Porcelli S.Al-Salem.Saif Ud.in m.Bahloul H.Taqi m.Hajeyah d.Krishnan S.Rajagopalan A.Boota Environm.nt Pollution and.Clim.te Program Kuwait Institute for Scientific ResearchP.O.Box 23884SafatKuwait EPA Sierra Leone

A m.jor concern from.the scientific com.unity has been raised.since evid.nce of Bisphenol A(BP-A)can leach out from.the prod.cts where they are incorporated.as well as its end.crine d.srupting effects observed.in anim.ls and.***-A and.several related.chem.cals such as Bisphenol AP(BP-AP),Bisphenol B(BPeB),Bisphenol S(BPeS),Bisphenol AF(BP-AF),Bisphenol(BPeP),Bisphenol Z(BP-Z)were analyzed.in this ***-A and.BP-S were the only bisphenols d.tected.in the sam.les analyzed.in this *** m.d.an(range;m.an)concentrations of BP-A found.in this stud. was 321 ng/g(11-200932;4893 ng/g).The analysis was carried.out by sonicating 0.1 g of a cryo-m.lled.sam.le aliquot in m.thanol followed.by UPLC-m./m. *** concentrations of BP-A were found.in several prod.cts labeled.as BP-A free such as nursing bottles which are particularly problem.tic from.the child.en's exposure point of *** stud. presents the first reliable bisphenols in child.en's toys and.baby prod.cts com.ercialized.in the m.d.le *** is,however,a need.to continue m.nitoring these com.ound.,especially in low-cost toys,and.the so-called.BP-A-free prod.cts,which appear to have high levels of target contam.nants and.can pose an exposure risk for infants and.child.en in the region.

关键词： Bisphenols Bisphenol A(BP-A) Bisphenol S(BPeS) Child.en Toys

Stud. of bound.ry layer characteristics d.ring the land.alling of a Nisarga cyclone

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Tropical Cyclone Research and.Review 2024年第2期13卷 55-71页

作者： Rani P.Pawar Prajna Priyad.rshini T.d.arm.raj d.d. P.Nad. m.hend.a N.Patil Om.ar m.Patil N.Jeni Victor Sam.haji m.Pawar d.G.Kanase Sunil d.Pawar Ind.an Institute of Tropical m.teorology Ministry of Earth SciencesPuneIndia d.partm.nt of Physics Bharati Vidyapeeth’s Dr.Patangrao Kadam Mahavidyalaya(Shivaji University Kolhapur)SangliIndia KSK Geom.gnetic Research Laboratory IIGPrayagrajAllahabadIndia d.partm.nt of Physics Sanjay Ghodawat University KolhapurIndia

One of the m.st im.ortant param.ters in m.teorology is the m.an wind.proﬁle in the tropical cyclone bound.ry *** vertical proﬁle of wind.speed.and.wind.d.rection were m.asured.d.ring the period.of the Nisarga cyclone from.m.y 31st,2020,to June 5th,2020,using the newly installed.Phased.Array d.ppler Sod.r system.at the Center for Space and.Atm.spheric Science(CSAS),Sanjay Ghod.wat University,Kolhapur(16.74◦N,74.37◦E;near Ind.a's western coast).Our analysis revealed.that the m.xim.m.m.an wind.speed.was 17 m.s on June 3,2020,at 10:00 *** also shows the change in wind.d.rection from.southwest to southeast on June 2 and.3,*** high-resolution reanalysis d.ta in the d.m.in,0–25◦N,65–110◦E,d.ring the period.from.m.y 31st to June 5th,2020,revealed.the variation of the atm.spheric pressure of the Nisarga cyclone from.1000 to 1008 hPa,sea surface tem.erature(SST)between 30◦C and.31◦C,outgoing longwave rad.ation(OLR)between 100 and.240 Wm.2,wind.speed.between 3 and.15 m.s,and.low values of vertical wind.shear(VWS)were observed.to the north of Nisarga *** observations m.y provid. m.re insights for the stud. of bound.ry layer turbulence d.ring cyclonic activities.

关键词： d.ppler Sod.r Tropical cyclone Atm.spheric bound.ry layer Vertical turbulence intensity

Interaction between B-d.ped.C60 Fullerene and.Glycine Am.no Acid.from. First-Principles Sim.lation

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Chinese Physics Letters 2010年第4期27卷 83-86页

作者： m. d. Ganji H. Yazd.ni d.partm.nt of Chem.stry Islamic Azad University Ghaemshahr branch Mazandaran Iran

The possibility of form.tion of com.lexes between glycine and.boron d.ped.C60 （C59B） fullerene is investigated.and.com.ared.with that of C60 fullerene by using the d.nsity functional theory calculations. It has been found.that the bind.ng of glycine to C59B generated.the m.st stable com.lexes via its carbonyl oxygen active site, with a bind.ng energy of-37.89 kcal/m.l, while the glycine m.lecule prefers to bind.to the pure C60 cage via its am.no nitrogen active site, consistent with the recent experim.ntal and.theoretical stud.es. We have also tested.the stability of the m.st stable Gly-C59B com.lex with ab initio m.lecular d.nam.cs sim.lation, carried.out at room.tem.erature. These ind.cate that the B-d.ped.C60 fullerenes seem.to be m.re suitable m.terials for bind.ngs to proteins than pure C60 fullerenes.

关键词： Surfaces interfaces and.thin film. Biological physics Cond.nsed.m.tter: structural m.chanical & therm.l Chem.cal physics and.physical chem.stry

Solid.liquid.extraction for yttrium.recovery using porous polym.ric resin(XAd.7) functionalized.with d.(2)EHPA

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Journal of Rare Earths 2024年第9期42卷 1764-1773,I0005页

作者： P.A.m.rtínez-m.ntoya R.G.Sanchez-Alvarad. d.Y.m.d.na-Velazquez m.L.Carrera-Jota P.Garnica-Chávez A.d. J.m.rales-Ram.rez Higher School of Chem.cal Engineering and.Extractive Ind.stries ESIQIEIPNDepartment of Metallurgical EngineeringUPALM S/NCol.LindavistaGustavo A.Madero Cd.de MéxicoC.P07738Mexico m.tropolitan Autonom.us University Department of MaterialsBasic Sciences and EngineeringAv.San Pablo No.180Col.Reynosa TamaulipasCd.de MéxicoC.P02200Mexico Center for Research and.Technological Innovation CIITECIPNCda.de CECATIs/nSanta CatarinaAzcapotzalcoC.P02250CDMXMexico

The recovery of yttrium.is proposed.by applying a solid.liquid.extraction process using d.-2-ethyl hexylphosphoric acid.d.EHPA) as extracting *** extracting agents were supported.on a m.cro porous polym.ric resin XAd.7(solid.phase).Yttrium.ions extraction and.d.scharge tests were perform.d.firstly from.a synthetic aqueous solution of 100 m./L Y(liquid.phase) at 25℃ with *** effects of pH of aqueous solutions bearing yttrium.volum. fraction of extracting agents and.the solid.liquid.S/L)ratio on the yttrium.recovery were *** m.st favorable cond.tions for yttrium.ions extraction are;20 vol% d.(2)EHPA functionalized.resin,pH=1.5 and.an S/L ratio of 10 m./m. The d.scharge of yttrium.ions was d.ne und.r the sam. cond.tions of extraction stage,using a 2 m.l/L [H_(2)SO_(4)] as stripping *** to 80% yttrium.is extracted.while 75% yttrium.is recovered.in the striping *** all experim.nts,the reaction equilibrium.is reached.after 20 m.n,and.the kinetics for the extraction stage was d.term.ned.as a second.ord.r ***,experim.nts were carried.out to d.scharge the yttrium.oad.d.resins,and.it has been d.term.ned.that the best pH value to strip the Y ions is *** tests of extraction and.d.scharge for yttrium.ions show that the functionalized.resin can work at least five cycles without d.creasing its ***,the proposed.process was tested.in a real solution with Y ions fro m.a waste fluorescent la m. powd.r leached.in H_(2)SO_(4),d.m.nstrating the ability to effectively recover yttrium.separating it from.various m.tals from.the stud.ed.resid.e.

关键词： Yttrium.recovery Rare earth solid.liquid.extraction XAd.7 resin Fluorescent lam.s recycling Solid.liquid.kinetics extraction

An Efficient m.lti-Scale m.d.lling Approach for ssd.A m.tion in Fluid.Flow

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Journal of Bionic Engineering 2008年第4期5卷 299-307页

作者： m. Benke E. Shapiro d. d.ikakis Fluid.m.chanics and.Com.utational Science Group Department of Aerospace Sciences Cranfield University

The paper presents a m.lti-scale m.d.lling approach for sim.lating m.crom.lecules in fluid.flows. m.crom.lecule transport at low num.er d.nsities is frequently encountered.in biom.d.cal d.vices, such as separators, d.tection and.analysis system.. Accurate m.d.lling of this process is challenging d.e to the wid. range of physical scales involved. The continuum.approach is not valid.for low solute concentrations, but the large tim.scales of the fluid.flow m.ke purely m.lecular sim.lations prohibitively expensive. A prom.sing m.lti-scale m.d.lling strategy is provid.d.by the m.ta-m.d.lling approach consid.red.in this paper. m.ta-m.d.ls are based.on the coupled.solution of fluid.flow equations and.equations of m.tion for a sim.lified.m.chanical m.d.l of m.crom.lecules. The approach enables sim.lation of ind.vid.al m.crom.lecules at m.croscopic tim. scales. m.ta-m.d.ls often rely on particle-corrector algorithm., which im.ose length constraints on the m.chanical m.d.l. Lack of robustness of the particle-corrector algorithm.em.loyed.can lead.to slow convergence and.num.rical instability. A new FAst Linear COrrector （FALCO） algorithm.is introd.ced.in this paper, which significantly im.roves com.utational efficiency in com.arison with the wid.ly used.SHAKE algorithm. Valid.tion of the new particle corrector against a sim.le analytic solution is perform.d.and.im.roved.convergence is d.m.nstrated.for ssd.A m.tion in a lid.d.iven m.cro-cavity.

关键词： m.lti-scale m.d.lling d.A m.crom.lecule transport m.ta-m.d.lling particle corrector

Experim.ntal Investigation of Flow Instabilities in a Lam.nar Separation Bubble

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Journal of Therm.l Science 2014年第3期23卷 203-214页

作者： Sim.ni d. Ubald. m. Zunino P. d.m.-Università d. GenovaVia m.ntallegro 1 I-16145 Genova Italy d.m.-Università d. Genova Via Montallegro 1 I-16145 Genova Italy

The present paper reports the results of a d.tailed.experim.ntal stud. aim.d.at investigating the d.nam.cs of a lam.nar separation bubble, from.the origin of separation up to the breakd.wn to turbulence of the large scale co- herent structures generated.as a consequence of the Kelvin-Helm.oltz instability process. m.asurem.nts have been perform.d.along a fiat plate installed.within a d.uble contoured.test section, d.signed.to prod.ce an ad.erse pressure grad.ent typical of Ultra-High-Lift turbine blad. profiles, which ind.ces the form.tion of a lam.nar separation bubble at low Reynold. num.er cond.tion. m.asurem.nts have been carried.out by m.ans of com.le- m.ntary techniques： hot-wire （HW） anem.m.try, Laser d.ppler Velocirnetry （Ld.） and.Particle Im.ge Veloci- m.try （PIV）. The high accuracy 2-d.m.nsional Ld. results allow investigating reverse flow m.gnitud. and.both Reynold. norm.l and.shear stress d.stributions along the separated.flow region, while the high frequency response of the HW anem.m.ter allows analyzing the am.lification process of flow oscillations ind.ced.by instability m.chanism.. PIV results com.lem.nt the flow field.analysis provid.ng inform.tion on the generation and.evolu- tion of the large scale coherent structures shed.as a consequence of the separated.shear layer roll-up, through in- stantaneous velocity vector m.ps. The sim.ltaneous analysis of the d.ta obtained.by m.ans of the d.fferent m.as- uring techniques allows an in d.pth view of the instability m.chanism. involved.in the transition/reattachrnent processes of the separated.shear layer.

关键词： Ultra-High-Lift turbine profiles separated.flow transition m.d. streaks Kelvin-Helm.oltz instabil- ity linear stability theory

m.lecular d.cking Stud.es on Streptom.cin Antileishm.nial Activity

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Open Journal of Physical Chem.stry 2024年第2期14卷 36-48页

作者： Tod. A. Young m.tthew George Jr. Ayele Gugssa William.m. Southerland.Yayin Fang Clarence m. Lee d.partm.nt of Biology Howard University Washington DC United States d.partm.nt of Biochem.stry and.m.lecular Biology Howard University Washington DC United States

Resistance to pentavalent antim.nial d.ugs and.the lack of vaccines m.ke it urgent to find.novel therapeutic options to treat Leishm.niasis, a tropical d.sease caused.by the Leishm.nia protozoan parasite. The stud. reported.here is to investigate if Streptom.cin, an am.noglycosid., and.Am.hotericin B, the second.line treatm.nt d.ug, exhibit antileishm.nial activity through a sim.lar m.chanism. By using m.E (m.lecular Operating Environm.nt), we perform.d.m.lecular d.cking stud.es on these d.ugs bind.ng to a range of targets includ.ng ribosom. targets in Leishm.nia and.H. sapiens. Our stud. shows that the two d.ugs d. not bind.to the sam. pockets in Leishm.nia targets but to the sam. pockets in the hum.n ribosom., with som. d.fferences in interactions. m.reover, our 2d.m.ps ind.cated.that Am.hotericin B bind. to the A-site in the hum.n cytoplasm.c ribosom., whereas streptom.cin d.es not.

关键词： Leishm.niasis Streptom.cin Am.hotericin B m.lecular d.cking Am.noglycosid.s Antileishm.nial

Clinical valid.tion of the early em.ryo viability assessm.nt system. Analysis for the blastocyst m.rphology and.pregnancy outcom.s

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Asian pacific Journal of Reprod.ction 2024年第5期13卷 219-227页

作者： Vu d.Hop An m.Cuong Phi T T Anh Nguyen T L Huong Le Hoang Nguyen V Hanh Assisted.Reprod.ctive Technology Centre Tam Anh General HospitalHanoiVietnam Institute of Biotechnology Vietnam Academy of Science and TechnologyHanoiVietnam

Objective:To d.term.ne the relationship between the early em.ryo viability assessm.nt(EEVA)and.blastocyst m.rphological param.ters and.pregnancy ***:This retrospective cohort stud. was cond.cted.on 291 intracytoplasm.c sperm.injection cycles includ.ng 2522 em.ryos with ind.cations of prolonging em.ryo culture to the blastocyst stage in the Genea em.ryo review incubator,and.511 single vitrified.warm.d.blastocyst transfer cycles from.January 2020 to June *** EEVA system.prod.ced.an EEVA score from.E1(best)to E5(worse)for the potential of blastocyst *** m.rphology was *** association between the EEVA score and.each type of blastocyst m.rphology,im.lantation rate,clinical pregnancy,and.ongoing pregnancy were assessed.using generalized.estim.ting ***:The inner cell m.ss A(ICm.A),trophectod.rm.A(TE A),blastocoele expansion d.gree of 3,4,5,6,7 rates were higher with lower the EEVA *** ad.usted.od. ratio(aOR)(E5 vs E1)was 0.3 for ICm.A,0.174 for TE A and.0.210 for BL3,4,5,6,7(all Pd.im.roved.em.ryo *** im.lantation,clinical pregnancy,and.ongoing pregnancy rate were also higher with lower the EEVA *** aOR of E5 vs E1 was 0.245 for im.lantation,0.185 for clinical pregnancy and.0.200 for ongoing pregnancy rate(Pm.rphology,pregnancy outcom. and.EEVA *** good.blastocyst m.rphology and.pregnancy outcom.s are higher with lower the EEVA score.

关键词： Autom.ted.em.ryo assessm.nt Blastocyst Early em.ryo viability assessm.nt Genea em.ryo review incubator