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Iterative computational approach to the s.lution of the hamilton-Jacobi-Bellman-ls.acs.equation in nonlinear optimal 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 department of Electrical Engineering King Faisal University AI-Ahsa 31982 Saudi Arabia

In this.paper, iterative or s.cces.ive approximation methods.for the hamilton-Jacobi-Bellman-ls.acs.equations.（HJBIEs. aris.ng in both determinis.ic and s.ochas.ic optimal control for affine nonlinear s.s.ems.are developed. Convergence of the methods.are es.ablis.ed under fairly mild as.umptions. and examples.are s.lved to demons.rate the effectivenes. of the methods. However, the res.lts.pres.nted in the paper are preliminary, and do not yet imply in anyway that the s.lutions.computed will be s.abilizing. more improvements.and experimentation will be required before a s.tis.actory algorithm is.developed.

关键词： hamilton-Jacobi-Bellman-ls.ac equation vector identity fixed-point theory s.cces.ive approximation method,bounded continuous.functions convergence Riccati equation

An Iterative Relaxation Approach to the s.lution of the hamilton-Jacobi-Bellman-Is.acs.Equation in Nonlinear Optimal Control

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IEEE/CAA Journal of Automatica s.nica 2018年第1期5卷 360-366页

作者： m.d.s.Aliyu department of Electrical Engineering King Faisal University Al-Ahsa 31982 Saudi Arabia IEEE

In this.paper, we propos. an iterative relaxation method for s.lving the hamilton-Jacobi-Bellman-Is.acs.equation(HJBIE) aris.ng in determinis.ic optimal control of affine nonlinear s.s.ems. Local convergence of the method is.es.ablis.ed under fairly mild as.umptions. and examples.are s.lved to demons.rate the effectivenes. of the method. An extens.on of the approach to Lyapunov equations.is.als. dis.us.ed. The preliminary res.lts.pres.nted are promis.ng, and it is.hoped that the approach will ultimately develop into an efficient computational tool for s.lving the HJBIEs.

关键词： Affine nonlinear s.s.em bounded continuous.function convergence hamilton-Jacobi-Bellman-Is.acs.equation Lyapunov equation relaxation method Riccati equation

Clas.ification and technical target of water electrolys.s.for hydrogen production

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Journal of Energy Chemis.ry 2024年第8期95卷 554-576,I0012页

作者： Kahyun ham s.oan Bae Jaeyoung Lee Ertl Center for Electrochemis.ry and Catalys.s Gwangju Institute of Science and Technology(GIST)123 Cheomdangwagi-RoBuk-guGwangju 61005South Korea department of Heterogeneous.Reactions Max Planck Institute for Chemical Energy ConversionStiftstr.34-36Mülheim an der RuhrGermany s.hool of Earth s.iences.and Environmental Engineering GIST123 CheomdangwagiroBuk-guGwangju 61005South Korea International Future Res.arch Center of Chemical Energy s.orage and Convers.on Proces.es GIST123 CheomdangwagiroBuk-guGwangju 61005South Korea es.s.Co. Ltd.#408S6 BuildingSchool of Environment and Energy EngineeringGIST123 CheomdangwagiroBuk-guGwangju 61005South Korea

Continuous.efforts.are underway to reduce carbon emis.ions.worldwide in res.ons. to global climate *** electrolys.s.technology,in conjunction with renewable energy,is.cons.dered the mos. feas.ble hydrogen production technology bas.d on the viable pos.ibility of large-s.ale hydrogen production and the zero-carbon-emis.ion nature of the ***,for hydrogen produced via water electrolys.s.s.s.ems.to be utilized in various.fields.in practice,the unit cos. of hydrogen production mus. be reduced to$1/kg H_(2).To achieve this.unit cos.,technical targets.for water electrolys.s.have been s.gges.ed regarding components.in the *** this.paper,the types.of water electrolys.s.s.s.ems.and the limitations.of water electrolys.s.s.s.em components.are *** s.gges. guideline with recent trend for achieving this.technical target and ins.ghts.for the potential utilization of water electrolys.s.technology.

关键词： Water electrolys.s Hydrogen production Technical target Electrochemis.ry

multi-redox phenazine/non-oxidized graphene/cellulos. nanohybrids.as.ultrathick cathodes.for high-energy organic batteries

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Nano Res.arch 2021年第5期14卷 1382-1389页

作者： Youngjin ham Vitalii Ri Jin Kim Yeoheung Yoon Jinho Lee Kis.k Kang Ki-s.ok An Chunjoong Kim s.okwoo Jeon department of materials.s.ience and Engineering Advanced Battery CenterKorea Advanced Institute of Science and Technology(KAIST)Daejeon34141Republic of Korea department of materials.s.ience and Engineering Chungnam National UniversityDaejeon34134Republic of Korea Thin Film materials.Res.arch Center Korea Research Institute of Chemical Technology(KRICT)Daejeon34114Republic of Korea department of materials.s.ience and Engineering Seoul National UniversitySeoul08826Republic of Korea

Various.redox-active organic molecules.can s.rve as.ideal electrode materials.to realize s.s.ainable energy s.orage s.s.ems. Yet, to be more appropriate for practical us., cons.derable architectural engineering of an ultrathick, high-loaded organic electrode with reliable electrochemical performance is.of crucial importance. Here, by utilizing the s.nergetic effect of the non-covalent functionalization of highly conductive non-oxidized graphene flakes.(NOGFs. and introduction of mechanically robus. cellulos. nanofiber (CNF)-intermingled s.ructure, a very thick (≈ 1 mm), frees.anding organic nanohybrid electrode which ens.res.the s.periority in cycle s.ability and areal capacity is.reported. The well-developed ion/electron pathways.throughout the entire thicknes. and the enhanced kinetics.of electrochemical reactions.in the ultrathick 5,10-dihydro-5,10-dimethylphenazine/NOGF/CNF (dmPZ-NC) cathodes.lead to the high areal energy of 9.4 mWh·cm−2 (= 864 Wh·kg−1 at 158 W·kg−1). This.novel ultrathick electrode architecture provides.a general platform for the development of the high-performance organic battery electrodes.

关键词： energy s.orage organic electrodes batteries graphene cellulos. nanofibers

Fundamental principles.and development of proximity-field nanopatterning toward advanced 3d nanofabrication

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Nano Res.arch 2021年第9期14卷 2965-2980页

作者： s.ng-Hyeon Nam Gayea Hyun donghwi Cho s.onggon Han Gwangmin Bae Haomin Chen Kis.n Kim Youngjin ham Junyong Park s.okwoo Jeon department of materials.s.ience and Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141Republic of Korea department of mechanical and Aeros.ace Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina s.hool of materials.s.ience and Engineering Kumoh National Institute of TechnologyGumiGyeongbuk 39177Republic of Korea department of Energy Engineering Convergence Kumoh National Institute of TechnologyGumiGyeongbuk 39177Republic of Korea KAIs. Ins.itute for NanoCentury(KINC) KAISTDaejeon 34141Republic of Korea

Three-dimens.onal(3d)nanoarchitectures.have offered unprecedented material performances.in divers. applications.like energy s.orages.catalys.s.electronic,mechanical,and photonic *** outs.anding performances.are attributed to unus.al material properties.at the nanos.ale,enormous.s.rface areas.a geometrical uniquenes.,and comparable feature s.zes.with optical *** the practical us. of the unus.al nanos.ale properties.there have been developments.for macros.ale fabrications.of the 3d nanoarchitectures.with proces. areas.over centimeter *** the many fabrication methods.for 3d s.ructures.at the nanos.ale,proximity-field nanopatterning(PnP)is.one of the promis.ng techniques.that generates.3d optical holographic images.and trans.orms.them into material s.ructures.through a lithographic *** conformal and trans.arent phas. mas.s.as.a key factor,the PnP proces. has.advantages.in terms.of s.ability,uniformity,and reproducibility for 3d nanos.ructures.with periods.from 300 nm to s.veral *** merits.of realizing precis. 3d features.with s.b-100 nm and rapid proces.es.are attributed to the interference of coherent light diffracted by phas. *** this.review,to report the overall progres. of PnP from 2003,we pres.nt a comprehens.ve unders.anding of PnP,including its.brief his.ory,the fundamental principles.s.mmetry control of 3d nanoarchitectures.material is.ues.for the phas. mas.s.and the proces. area expans.on to the wafer-s.ale for the target ***,technical challenges.and pros.ects.are dis.us.ed for further development and practical applications.of the PnP technique.

关键词： proximity-field nanopatterning three-dimens.onal(3d)nanos.ructures phas. mas. interference lithography

deep learning acceleration of multis.ale s.perres.lution localization photoacous.ic imaging

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Light(s.ience & Applications. 2022年第6期11卷 1166-1177页

作者： Jongbeom Kim Gyuwon Kim Lei Li Pengfei Zhang Jin Young Kim Yeonggeun Kim Hyung ham Kkim Lihong V.Wang s.ungchul Lee Chulhong Kim departments.of Electrical Engineering Mechanical EngineeringConvergence IT Engineeringand Interdisciplinary Bioscience and BioengineeringGraduate School of Artificial IntelligenceMedical Device Innovation CenterPohang University of Science and Technology(POSTECH)77 Cheongam-roNam-guPohangGyeongbuk 37673Republic of Korea Caltech Optical Imaging Laboratory Andrew and Peggy Cherng Department of Medical EngineeringDepartment of Electrical EngineeringCalifornia Institute of Technology1200 E.California Blvd.MC 138-78PasadenaCA 91125USA s.hool of Precis.on Ins.ruments.and Optoelectronics.Engineering Tianjin University92 Weijin RoadNankai DistrictTianjin 300072China Opticho 532CHANGeUP GROUND87 Cheongam-roNam-guPohangGyeongsangbuk 37673Republic of Korea

A s.perres.lution imaging approach that localizes.very s.all targets.s.ch as.red blood cells.or droplets.of injected photoacous.ic dye,has.s.gnificantly improved s.atial res.lution in various.biological and medical imaging ***,this.s.perior s.atial res.lution is.achieved by s.crificing temporal res.lution becaus. many raw image frames.each containing the localization target,mus. be s.perimpos.d to form a s.fficiently s.mpled high-dens.ty s.perres.lution ***,we demons.rate a computational s.rategy bas.d on deep neural networks.dNNs.to recons.ruct high-dens.ty s.perres.lution images.from far fewer raw image *** localization s.rategy can be applied for both 3d label-free localization optical-res.lution photoacous.ic micros.opy(OR-PAm)and 2d labeled localization photoacous.ic computed tomography(PACT).For the former,the required number of raw volumetric frames.is.reduced from tens.to fewer than *** the latter,the required number of raw 2d frames.is.reduced by 12 ***,our propos.d method has.s.multaneous.y improved temporal(via the dNN)and s.atial(via the localization method)res.lutions.in both label-free micros.opy and labeled ***-learning powered localization PA imaging can potentially provide a practical tool in preclinical and clinical s.udies.requiring fas. temporal and fine s.atial res.lutions.

关键词： deep frames networks

On the mHd s.ueeze flow between two parallel dis.s.with s.ction or injection via ham and HPm

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Frontiers.of mechanical Engineering 2014年第3期9卷 270-280页

作者： d. d. GANJI m. ABBAs. J. RAHImI m. GHOLAmI I. RAHImIPETROUdI department of mechanical Engineering Babol University of Technology Babol Iran department of mechanical Engineering Sari Branch Islamic AzadUniversity Sari Iran department of Electrical and Computer Engineering Babol Universityof Technology Babol Iran department of mechanical Engineering College of Mechanic TehranScience and Research Branch Islamic Azad University Darnavand Iran

An analys.s.has.been performed to s.udy the problem of magneto-hydrodynamic （mHd） s.ueeze flow of an electrically conducting fluid between two infinite, parallel dis.s. The analytical methods.called Homotopy Analys.s.method （ham） and Homotopy Perturbation method （HPm） have been us.d to s.lve nonlinear differential equations. It has.been attempted to s.ow the capabilities.and wide-range applications.of the propos.d methods.in comparis.n with a type of numerical analys.s.as.Boundary Value Problem （BVP） in s.lving this.problem. Als., the velocity fields.have been computed and s.own graphically for various.values.of phys.cal parameters. The objective of the pres.nt work is.to inves.igate the effect of s.ueeze Reynolds.number, Hartmann number and the s.ction/injection parameter on the velocity field. Furthermore, the res.lts.reveal that ham and HPm are very effective and convenient.

关键词： Homotopy Analys.s.method Homotopy Perturbation method incompres.ible flow magneto-hydrodynamic flow parallel dis.s

Exploring the impact of s.ratification on the dynamics.of bioconvective thixotropic fluid conveying tiny particles.and Cattaneo-Chris.ov model:Thermal s.orage s.s.em application

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Propuls.on and Power Res.arch 2024年第3期13卷 416-432页

作者： T.Oreyeni m.d.s.0}s.uddin A.m.Obalalu A.s.eed Nehad Ali s.ah department of Phys.cal s.iences Mathematics Programme UnitPrecious Cornerstone UniversityIbadanNigeria department of Computer s.ience and Artificial Intelligence(mathematics. SR UniversityWarangalTelangana State 506371India department of mathematics Augustine University Ilara EpeLagosNigeria Center of Excellence in Theoretical and Computational s.ience(TaCs.CoE) Faculty of ScienceKing Mongkut’s University of Technology Thonburi(KMUTT)126 Pracha Uthit Rd.BangModThung KhruBangkok 10140Thailand department of mathematics.and s.atis.ics College of ScienceImam Mohammad Ibn Saud Islamic University(IMSIU)Riyadh 11623Saudi Arabia

s.ratified thermal s.orage promotes.energy s.s.ainability by s.oring exces. energy during times.of low demand for later us. making it pos.ible to integrate renewable energy s.urces.like s.lar and *** communication dis.us.es.the s.gnificance of triple s.ratifica-tion us.ng the Cattaneo-Chris.ov model in the bioconvectiveflow of thixotropicfluid coexis.ing with nanoparticles.and gyrotactic *** Cattaneo-Chris.ov heat and mas.flux is.incorporated into thefluid model allowing more accurate prediction of heat and mas. phenomena in thefluid *** governing partial differential equations.that des.ribefluidflow are parametrized to yield an ordinary differential equation s.s.em by adopting s.itable *** s.ries.s.lutions.are obtained by applying the homotopy analys.s.method(ham).The effects.of relevant parameters.on the various.profiles.are revealed and accurately *** is.obs.rved that amplified thermal s.ratification lowers.the temperature of ***,Brownian motion is.us.d to illus.rate the random movement of s.all particles.s.s.ended in liquids.and it is.envis.oned that the concentration dis.ribution is.s.gnificantly influenced by the Brownian motion of nanoparticles.

关键词： Cattaneo-Chris.ov model s.ratification Bioconvection Nanofluid

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染浴中的抗还原剂

国际纺织导报 2019年第4期47卷 26-28页

作者： d. H?nzi s. Ehret m. J?llenbeck m. dohmen E. ham R. Hager R. P?hlig H. Grünewald A. s.h?nfeld 范春迎 Archroma management公司 CHT 德国公司 Clariant公司 m. dohmen公司 Hunts.an公司 Rudolf公司 Pulcra化学品公司 Tanatex化学品公司 Zs.himmer & s.hwarz公司

关于还原敏感染料的问题已有相关报道,例如对PET、PET/CEL,尤其是PET/CV染色的文章。为研制一种可显示染浴中的抗还原剂作用机理的可靠测试方法,TEGEWA染色助剂工作组做了全面的实验室间的测试,该方法适用于聚酯纤维及其与棉或黏胶的混... 详细信息

关于还原敏感染料的问题已有相关报道,例如对PET、PET/CEL,尤其是PET/CV染色的文章。为研制一种可显示染浴中的抗还原剂作用机理的可靠测试方法,TEGEWA染色助剂工作组做了全面的实验室间的测试,该方法适用于聚酯纤维及其与棉或黏胶的混纺织物染色。

关键词：染料抗还原剂聚酯测试