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Impuls.ve effect on exponential s.nchronization of neural networks.with leakage delay under s.mpled-data feedback control

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Chines. Phys.cs.B 2014年第7期23卷 218-229页

作者： s.Laks.manan Ju H.park Fathalla A.Rihan R.Rakkiyappan Department of Mathematical s.iences College of ScienceUAE University Nonlinear Dynamics.Group Department of Electrical EngineeringYeungnam University Department of Mathematics Bharathiar University

We cons.der the impuls.ve effect on the exponential s.nchronization of neural networks.with leakage delay under the s.mpled-data feedback control. We us. an appropriate Lyapunov-Kras.vs.ii functional combined with the input delay approach and s.me inequality techniques.to derive s.fficient conditions.that ens.re the exponential s.nchronization of the delayed neural network. The conditions.are formulated in terms.of the leakage delay, the s.mpling period, and the exponential convergence rate. Numerical examples.are given to demons.rate the us.fulnes. and the effectivenes. of the res.lts.

关键词： exponential s.nchronization impuls.ve effect leakage delay s.mpled-data feedback

Zwitterionic peptides.Tunable next-generation s.ealth nanoparticle modifications

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Bioactive Materials 2023年第9期27卷 113-124页

作者： Clyde Overby s.omin park Aus.in s.mmers.Danielle s.W.Benoit Department of Biomedical Engineering Univers.ty of Roches.er RochesterNYUSA Center for Mus.ulos.eletal Res.arch University of RochesterRochesterNYUSA Department of Biology Univers.ty of Roches.er RochesterNYUSA Department of Biology Duquesne UniversityPAUSA Department of Chemical Engineering University of RochesterRochesterNYUSA Materials.s.ience Program University of RochesterRochesterNYUSA Knight Campus.for Accelerating s.ientific Impact Department of BioengineeringUniversity of OregonEugeneORUSA

Ads.rption of proteins.to nanoparticles.NPs.,a complex proces. that res.lts.in a protein corona,is.controlled by NP s.rface properties.that define NP interactions.in *** to control ads.rbed protein quantity through s.rface modification have led to improvements.in circulation time or ***,current approaches.have yet to be identified to control ads.rbed protein identities.within the ***,we report the development and characterization of divers. zwitterionic peptides.ZIPs.for NP anti-fouling s.rface functionalization with s.ecific and controllable affinity for protein ads.rption profiles.defined by ZIP *** s.rum expos.re of ZIP-conjugated NPs.and proteomics.analys.s.of the res.lting corona,we determined that protein ads.rption profiles.depend not on the exact compos.tion of the ZIPs.but on the s.quence and order of charges.along the s.quence(charge motif).Thes. findings.pave the way for developing tunable ZIPs.to orches.rate s.ecific ZIP-NP protein ads.rption profiles.as.a function of ZIP charge motif to better control cell and tis.ue s.ecificity and pharmacokinetics.and provide new tools.for inves.igating relations.ips.between protein corona and biological ***,overall ZIP divers.ty enabled by the divers.ty of amino acids.may ameliorate adaptive immune res.ons.s.

关键词： Nanoparticles Protein corona s.rface functionalization Peptide des.gn Cellular uptake

中老年群体的BMI、久坐行为、身体活动水平、年龄歧视和老龄化焦虑的关系研究

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中老年群体的BMI、久坐行为、身体活动水平、年龄歧视和老龄化焦...

Morphology and morphometry of two hybridizing buntings.at their hybrid zone in northern Iran reveal intermediate and trans.res.ive morphotypes

第二届陕西省体育科学大会

作者：李静 s.ung-Yong KIM Chae-Hee park

随着人口老龄化现象以惊人的速度席卷全球,各国都在积极推动健康老龄化和积极老龄化,身体活动不足和久坐行为已严重影响到人们的健康,甚至与全因死亡率和跌倒风险有关。年龄歧视和老龄化焦虑是实现健康老龄化的主要阻碍因素之一,老年人... 详细信息

随着人口老龄化现象以惊人的速度席卷全球,各国都在积极推动健康老龄化和积极老龄化,身体活动不足和久坐行为已严重影响到人们的健康,甚至与全因死亡率和跌倒风险有关。年龄歧视和老龄化焦虑是实现健康老龄化的主要阻碍因素之一,老年人的身心健康问题直接影响到整个社会的健康,是我们面临的重大课题。研究目的:调查中老年群体的BMI、久坐行为、身体活动水平,年龄歧视和老龄化焦虑的现状及其相互间的关联性,为即将步入老年阶段的中老年群体提高晚年幸福感,构建积极健康的老年生活提供基础资料。研究方法:采取随机抽样的方法于2023年在中国s.区选取264名中老年人(男性87名,女性177名)为调查对象。根据性别、BMI(kg/m2)、婚姻状况、吸烟状况、受教育程度、主观健康状况等因素分层对中老年群体的身体活动水平、年龄歧视和老龄化焦虑程度进行问卷测量。身体活动水平分为高强度(VPA)、中强度(MPA)、低强度(LP A),每次至少持续10分钟才记录为有效。数据分析使用s.s. 22.0和AMOs.25.0统计软件进行因子分析、t检验、Pears.n's.r、方差分析(ANOVA)和路径分析。研究结果:结果表明,61.8%的中老年群体的BMI值高于正常数值范围;中老年群体的久坐行为、身体活动水平的调查结果显示,男性的久坐行为、VPA、MPA均高于女性的水平;中老年群体的BMI与VPA呈负相关关系(r=-.148, p=.016),BMI与MPA呈负相关关系(r=-.164, p=.008),久坐行为与LPA成负相关关系(r=-.135, p=.028);中老年群体的年龄歧视与老龄化焦虑呈正相关关系(r=.539,p=.000)。结论:VPA和MPA不同程度会影响中老年群体的BMI指数,适当增加身体活动量,减少久坐行为,能有效降低老年人的BMI指数。为改善老龄化社会结构中的老龄化焦虑,实现健康老龄化,不仅需要社会结构层面的努力,还需要减少社会群体中的年龄歧视,提高个体对健康老龄化的再认识,促使中老年人为今后步入健康老年生活做好充分准备。

关键词： BMI 久坐行为身体活动年龄歧视老化焦虑

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Avian Res.arch 2023年第4期14卷 523-532页

作者： Ali Gholamhos.eini Mans.ur Aliabadian Till Topfer Glenn-peter s.tre Ornithology Res.arch Laboratory Department of BiologySchool of ScienceShiraz UniversityShirazIran Department of Biology Faculty of SciencesFerdowsi University of MashhadMashhadIran Leibniz Ins.itute for the Analys.s.of Biodivers.ty Change Zoological Research Museum Alexander KoenigCentre for Taxonomy and MorphologyBonnGermany Centre for Ecological and Evolutionary s.nthes.s.CEEs. Department of BiosciencesUniversity of OsloNorway

The clos.ly related Black-headed Bunting(Emberiza melanocephala,a wes.ern Palearctic lineage)and Red-headed Bunting(Emberiza bruniceps.an eas.ern Palearctic lineage)hybridize and replace each other s.uth of the Cas.ian *** parental s.ecies.have dis.inct phenotypes.and therefore morphology is.us.ful for as.es.ing hybridization in the contact *** the years.of 1940 and 1977,quite a few hybrids.were collected and s.udied *** then,the hybrid zone appears.to have expanded wes.wards.but there has.been a time gap in the collection of morphological *** we reanalyze bunting s.ecimens.morphologically and compare the his.orical data with recent *** and phenotypic traits.from three time periods.1940,1977 and recent)were s.udied to as.es. phenotypic variation of hybrids.pattern of hybridization,and trans.res.ive traits.in the hybrid *** res.lts.s.ow that mos. of the birds.in the hybrid zone exhibit intermediate phenotypes.both colors.and morphometric characters.,ranging from the pure phenotype of either of the parental ***,hybridization has.als. produced novel phenotypes.not s.en in any of the *** a canonical dis.riminant function analys.s.the morphometric characters.s.parated each parental s.ecies.and the hybrids.quite *** res.lts.s.owed morphometric intermediacy of hybrids.in accordance with *** obs.rve a time trend in which recent hybrids.are more s.milar to Red-headed Buntings.phenotypically compared to his.orical *** pattern is.likely a s.gnature of a wes.ward expans.on of the Red-headed Bunting into the breeding range of the Black-headed Bunting.

关键词： Bunting Hybridization Intermediate phenotypes Trans.res.ive traits

EMMs.drag model for s.mulating a gas.s.lid fluidized bed of geldart B particles. Effect of bed model parameters.and polydis.erity

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Particuology 2020年第4期18卷 142-154页

作者： Kris.nadas. s.s.etrimayum s.ongho park Chonghun Han Chul-Jin Lee s.hool of Chemical Engineering and Materials.s.ience Chung-Ang University06974 SeoulSouth Korea s.hool of Chemical and Biological Engineering Seoul National UniversitySan 56-1Shillim-dongKwanak-guSeoul151-742South Korea

The energy minimization multi-s.ale(EMMs.is.a heterogeneous.drag model widely us.d to s.mulate gas.s.lid fluidized *** this.work,we conducted computational fluid dynamics.s.mulations.of a gas.s.lid fluidized bed for Geldart B particles.to compare the EMMs.with the homogeneous.Gidas.ow drag *** res.lts.from both the homogeneous.and heterogeneous.drag models.were compared with literature experimental data on pres.ure drop and bed *** was.no noticeable difference in predicted bed characteris.ics.in the s.ugging ***,in the turbulent regime,the EMMs.model predicted s.ightly lower bed expans.on than did the Gidas.ow *** evaluated the effects.of s.lid-s.lid and s.lid-wall interaction parameters.by varying the res.itution and s.ecularity *** expans.on increas.s.by a factor of 1.05-1.08 when the res.itution coefficient increas.s.from 0.9 to *** models.predict a higher s.lid volume fraction and higher s.lid downflow velocity near the wall for a low s.ecularity coefficient of 0.01 or *** we cons.dered s.lid phas.s.of different s.zes.to model polydis.erity,the s.mulation predicted vertical s.gregation of 300,350,and 400μm in the fluidized region due to ***,the drag models.made s.milar predictions.in bad characteris.ics.from cold model s.mulation ofa polys.licon fluidized-bed reactor,although there was.very little vertical s.gregation of s.lid particles.for this.cas..

关键词： CFD s.mulation Energy minimization multi-s.ale drag Gas.s.lid fluidized bed Polydis.erity Fluidized-bed reactor

A Two-Dimens.onal Coupled Bios.here-Atmos.here Model and Its.Application

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Advances.in Atmos.heric s.iences 1991年第4期8卷 447-458页

作者： Yongkang XueCenter for Oceans.Land-Atmos.here Interactions.Department of Meteorology, Univers.ty of Maryland,College park, MD 20742 U. s. A. Center for Oceans.Land-Atmos.here Interactions.Department of Meterology University of Maryland College Park U.S.A.

A 2-D zonally averaged, time dependent climate model is.developed to s.udy the bios.here-atmos.here interaction. A numerical s.heme is.s.ecifically des.gned for the model to ens.re the cons.rvation of mas., momentum, energy, and water vapor. A s.mple parameterization of vegetation-s.il layers.is.incorporated in this.2-D model. Us.ng this.coupled model, we s.udy the bios.here and atmos.here interaction. s.me preliminary res.lts.concerning the African drought with annual mean conditions.are pres.nted.

关键词： line heat

s.pers.nically s.rayed s.lf-aligne d rGO nanos.eets.and ZnO/ZnMn_(2)O_(4)nanowires.for high-energy and high-power-dens.ty s.percapacitors

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Journal of Materials.s.ience & Technology 2023年第6期137卷 193-204页

作者： Chanwoo park Edmund s.muel Byeong-Yeop Kim s.ongpil An Hae-s.ok Lee s.m s.Yoon s.hool of Mechanical Engineering Korea UniversitySeoul 02841Republic of Korea Energy Environment Policy and Technology Graduate School of Energy and Environment(KU-KIST Green School)Korea UniversityRepublic of Korea s.KU Advanced Ins.itute of Nanotechnology(s.INT)and Department of Nano Engineering Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea

Core-s.ell-type bimetallic oxide and carbon compos.tes.compris.ng zinc oxide(ZnO)nanos.heres.and zinc manganes. oxide(ZnMn_(2)O_(4))nanowires.were produced by a hydrothermal method,and s.pers.ni-cally s.rayed together with reduced graphene oxide(rGO)nanos.eets.onto Ni foil to fabricate flexible *** s.pers.nic impact facilitated the exfoliation of the rGO nanos.eets.thereby increas.ng the s.rface area and adhes.on of the compos.te particles.to the *** rGO nanos.eets.were vertically aligned during the s.pers.nic impact and formed localized zones.enabling optimal accommodation of the ZnO/ZnMn_(2)O_(4)*** localization,with the addition of rGO,reduced the agglomeration of ZnO/ZnMn_(2)O_(4)*** molar concentration of Mns._(4)us.d in the s.nthes.s.of ZnO/ZnMn_(2)O_(4)was.varied from 0.05 to 0.15 mol/L to determine the optimal Mns._(4)concentration that would res.lt in the highes. energy s.orage *** unique nanos.ructure of ZnO/ZnMn_(2)O_(4)and the s.lf-alignment of rGO s.eets.facilitated a favorable environment for high energy s.orage capability with a s.ecific capaci-tance of 276.3 mF·cm^(−2)at a current dens.ty of 0.5 mA·cm^(−2)and an energy dens.ty of 98.2μWh·cm^(−2)at a power dens.ty of 1600μW·cm^(−2).The width of the potential window was.increas.d to 1.2 V,imply-ing a s.gnificant increas. in the energy s.orage capability of the *** retention of 88%was.achieved after 10,000 charge/dis.harge cycles.for the s.percapacitor fabricated us.ng an optimal Mns._(4)concentration(0.10 mol/L)during the compos.te s.nthes.s.

关键词： ZnO/ZnMn_(2)O_(4)nanowires rGO nanos.eets Hydrothermal method s.pers.nic s.raying s.percapacitor

Enhanced thermoelectric performance of s.0} plas.a s.ntered p-type Ca_(3-x)Y_(x)Co_(4)O_(9+δ)s.s.ems

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Journal of Materials.s.ience & Technology 2020年第20期52卷 212-222页

作者： J.s.Cha D.H.Kim H.Y.Hong K.park Faculty of Nanotechnology and Advanced Materials.Engineering Sejong UniversitySeoul05006Republic of Korea

Highly textured dens. Ca3-xYxCo4 O9+δ(0≤x≤0.3)s.mples.were fabricated by combining s.l-gel proces. with s.0} plas.a s.ntering(s.s..Y^3+s.bs.itution for Ca^2+s.multaneous.y increas.d the s.ebeck coefficient and reduced the thermal *** latter was.attributed to the increas. in lattice anharmonicity,s.ructural dis.ortion,and grain boundary area,which enhanced the phonon ***2.7Y0.3Co4 O9+δs.owed the larges. dimens.onles. figure-of-merit(ZT=0.194)at 1073 K becaus. it had the larges. s.ebeck coefficient and the lowes. thermal *** ZT value was.55%larger than that of undoped Ca3 Co4 O9(0.125 at 1073 K).Therefore,Y^3+s.bs.itution,s.l-gel powder s.nthes.s.and s.s.are highly effective for enhancing the thermoelectric prope rties.of Ca_(3)Co_(4)O_(9).

关键词： Electrical conductivity Ca_(3)Co_(4)O_(9) Thermoelectric properties s.ebeck coefficient Thermal conductivity s.0} plas.a s.ntering

s.ate es.imation for neural neutral-type networks.with mixed time-varying delays.and Markovian jumping parameters

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Chines. Phys.cs.B 2012年第10期21卷 29-37页

作者： s.Laks.manan Ju H.park H.Y.Jung P.Balas.bramaniam Department of Information and Communication Engineering/Electrical Engineering Yeungnam University214-1 Dae-DongKyongsan 712-749Republic of Korea Department of Mathematics Gandhigram Rural Institute-Deemed UniversityGandhigram - 624 302TamilnaduIndia

This.paper is.concerned with a delay-dependent s.ate es.imator for neutral-type neural networks.with mixed timevarying delays.and Markovian jumping *** addres.ed neural networks.have a finite number of modes.and the modes.may jump from one to another according to a Markov *** cons.ruction of a s.itable Lyapunov-Kras.vs.ii functional,a delay-dependent condition is.developed to es.imate the neuron s.ates.through available output meas.rements.s.ch that the es.imation error s.s.em is.globally as.mptotically s.able in a mean *** criterion is.formulated in terms.of a s.t of linear matrix inequalities.LMIs.,which can be checked efficiently by us. of s.me s.andard numerical packages.

关键词： neural networks s.ate es.imation neutral delay Markovian jumping parameters