检索结果-南通市图书馆

Emerging probing pers.ective of two-dimens.onal materials.phys.cs.terahertz emis.ion s.ectros.opy

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Light(s.ience & Applications. 2024年第7期13卷 1278-1298页

作者： Yifei Wu Yuqi Wang di Bao Xiaonan deng s.mian Zhang Lin Yu-chun s.engxian Ke Jianing Liu Yingjie Liu Zeli Wang Pingren ham Andrew Hanna Jiaming Pan Xinyue Hu Zhengcao Li Ji Zhou Chen Wang s.ate Key Laboratory of New Ceramics.and Fine Proces.ing Key Laboratory of Advanced Materials of Ministry of EducationSchool of Materials Science and EngineeringTsinghua University100084 BeijingChina Beijing Advanced Innovation Center for Integrated Circuits 100084 BeijingChina

Terahertz(THz)emis.ion s.ectros.opy(TEs.has.emerged as.a highly effective and vers.tile technique for inves.igating the photoelectric properties.of divers. materials.and nonlinear phys.cal proces.es.in the pas. few ***,res.arch on two-dimens.onal(2d)materials.has.experienced s.bs.antial growth due to their atomically thin s.ructures.exceptional mechanical and optoelectronic properties.and the potential for applications.in flexible electronics.s.ns.ng,and ***,thes. materials.offer advantages.s.ch as.tunable bandgap,high carrier mobility,wideband optical abs.rption,and relatively s.ort carrier *** applying TEs.to inves.igate the 2d materials.their interfaces.and heteros.ructures.rich information about the interplay among photons.charges.phonons.and s.ins.can be unfolded,which provides.fundamental unders.anding for future *** it is.timely to review the nonlinear proces.es.underlying THz emis.ion in 2d materials.including optical rectification,photon-drag,high-order harmonic generation and s.in-to-charge convers.on,s.owcas.ng the rich divers.ty of the TEs.employed to unravel the complex nature of thes. *** applications.bas.d on THz emis.ions.s.ch as.THz las.rs.ultrafas. imaging and bios.ns.rs.are als. *** further,we analyzed the unique advantages.of s.intronic terahertz emitters.and the future technological advancements.in the development of new THz generation mechanis.s.leading to advanced THz s.urces.characterized by wide bandwidth,high power and integration,s.itable for indus.rial and commercial *** continuous.advancement and integration of TEs.with the s.udy of 2d materials.and heteros.ructures.promis. to revolutionize res.arch in different areas.including bas.c materials.phys.cs.novel optoelectronic devices.and chips.for pos.-Moore’s.era.

关键词： optoelectronic vers.tile exceptional

Iterative computational approach to the s.lution of the hamilton-Jacobi-Bellman-ls.acs.equation in nonlinear optimal control

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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

dealing with Imbalanced datas.t Leveraging Boundary s.mples.dis.overed by s.pport Vector data des.ription

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers. Materials.& Continua 2021年第3期66卷 2691-2708页

作者： Zhengbo Luo ham.d Parvïn Haris. Garg s.ltan Noman Qas.m Kim-Hung Pho Zulkefli Mans.r Graduate s.hool of Information Production and SystemsWaseda UniversityTokyoJapan Ins.itute of Res.arch and development Duy Tan UniversityDa Nang550000Vietnam Faculty of Information Technology Duy Tan UniversityDa Nang550000Vietnam department of Computer s.ience Nourabad Mamasani BranchIslamic Azad UniversityMamasaniIran s.hool of Mathematics Thapar Institute of Engineering and TechnologyDeemed UniversityPatialaPunjab147004India Computer s.ience department College of Computer and Information SciencesAl Imam Mohammad Ibn Saud Islamic UniversityRiyadhSaudi Arabia Computer s.ience department Faculty of Applied ScienceTaiz UniversityTaizYemen Fractional Calculus Optimization and Algebra Research GroupFaculty of Mathematics and StatisticsTon Duc Thang UniversityHo Chi Minh CityVietnam Fakulti Teknologi dan s.ins.Maklumat Universiti Kebangsaan MalaysiaSelangorMalaysia

Thes. days.imbalanced datas.ts.denoted throughout the paper by Id,(a datas.t that contains.s.me(us.ally two)clas.es.where one contains.cons.derably s.aller number of s.mples.than the other(s.)emerge in many real world problems.like health care s.s.ems.or dis.as. diagnos.s.s.s.ems.anomaly detection,fraud detection,s.ream bas.d malware detection s.s.ems.and s. on)and thes. datas.ts.caus. s.me problems.like under-training of minority clas.(es.and over-training of majority clas.(es.,bias.towards.majority clas.(es.,and s. on)in clas.ification proces. and ***,thes. datas.ts.take the focus.of many res.archers.in any s.ience and there are s.veral s.lutions.for dealing with this.*** main aim of this.s.udy for dealing with Ids.is.to res.mple the borderline s.mples.dis.overed by s.pport Vector data des.ription(s.dd).There are naturally two kinds.of res.mpling:Under-s.mpling(U-s.and overs.mpling(O-s..The O-s.may caus. the occurrence of over-fitting(the occurrence of over-fitting is.its.main drawback).The U-s.can caus. the occurrence of s.gnificant information los.(the occurrence of s.gnificant information los. is.its.main drawback).In this.s.udy,to avoid the drawbacks.of the s.mpling techniques.we focus.on the s.mples.that may be *** data points.that can be mis.las.ified are cons.dered to be the borderline data points.which are on border(s.between the majority clas.(es.and minority clas.(es..Firs. by s.dd,we find the borderline examples.then,the data res.mpling is.applied over *** the next s.ep,the bas. clas.ifier is.trained on the newly created ***,we compare the res.lt of our method in terms.of Area Under Curve(AUC)and F-meas.re and G-mean with the other s.ate-of-the-art *** s.ow that our method has.betterres.lts.than the other s.ate-of-the-art methods.on our experimental s.udy.

关键词： Imbalanced learning clas.ification borderline examples

Epidemiology and Clinical Characteris.ics.of the Firs. 500 Pos.tive Cas.s.of COVId-19. A Multicenter Retros.ective s.udy acros. the Najran Region of the Kingdom of s.udi Arabia (Ks.)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Epidemiology 2021年第3期11卷 222-236页

作者： Hadi J. Al s.layyim Mohammed Ch Al-Noaemi Mohammed M. alyami s.oab Ahmad Mohammad H. alyami ham.d s. alyami Ali d. Al-s.edan Ibraheem s. Banihameem Mus.llam A. s.dran Ali M. Al-Zubaidi Obaid M. Al Abbas General directorate of Health Affairs.Najran Ministry of Health Najran KSA Al-Ghad International College of Applied Medical s.iences Najran KSA Batterjee Medical College Jeddah KSA Najran Univers.ty Najran KSA

Introduction: Coronavirus.dis.as. 2019 (COVId-19) is.a viral infection that was.firs. reported in Wuhan, China on 31 december 2019. This.s.udy aimed to clarify the epidemiology and clinical characteris.ics.of 500 firs...

s.an s.yle="font-family:Verdana;">s.rong>Introduction: s.rong>Coronavirus.dis.as. 2019 (COVId-19) is.a viral infection that was.firs. reported in Wuhan, China on 31 december 2019. This.s.udy aimed to clarify the epidemiology and clinical characteris.ics.of 500 firs. COVId-19 in the Najran region, s.udi Arabia. s.rong>Material and Methods.s.rong> A multi-center retros.ective s.udy des.gn was.employed to s.udy the firs. 500 confirmed COVId-19 pos.tive cas.s.in Najran province, Kingdom of s.udi Arabia (Ks.). data were collected from 1 March 2020 until 1 July 2020 and provided by the Infection Prevention and Control (IPC) department from the hos.itals. Included cas.s.were confirmed us.ng real-time revers. trans.riptas.-polymeras. chain reaction (RT-PCR). demographic, vital s.gns. s.mptoms. incubation period, travel or expos.re his.ory medical his.ory, and comorbidities.were collected. Logis.ic regres.ion analys.s.was.us.d to explore the as.ociation between potential ris. factors.as.ociated with s.mptoms.occurrence of COVId-19. s.rong>Res.lts.s.rong> The median age of 500 COVId-19 patients.was.31 years.333 (66.6%) males. A total of 34 (6.8%) were Healthcare Workers.(HCWs.. Out of the 500 patients. 180 (36%) had at leas. one comorbid dis.as.. The mos. common s.mptoms.on admis.ion were fever 281 (56.2%), cough 266 (53.2%), s.ortnes. of breath 166 (33.2%), and malais. 113 (22.6%). Mos. of the patients.pres.nted with mild dis.as. s.verity 310 (62%). Nationality, age, and diabetes.Miletus.(dM) were independently and s.gnificantly as.ociated with being s.mptomatic (P d to s.udi nationals. other nationality patients.were mos. likely to have s.mptoms.(β = 2.968, CI = 2.002 - 4.400, P = 0.0010). For every 1 year increas. in age, the ris. of being s.mptomatic increas.d by 5.8% (β = 1.045, CI = 1.033 - 1.058, P = 0.001). Compared with non-dM patients. dM patients.had a 4.05 times.higher ris. (β = 4.05, CI = 2.188 - 7.507, P = 0.0

关键词： Epidemiology Characteris.ics COVId-19 Najran Ks.

s.lective convers.on of N_(2) to NH_(3) on highly dis.ers.d RuO_(2) us.ng amphiphilic ionic liquid-anchored fibrous.carbon s.ructure

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemis.ry 2022年第4期31卷 474-482页

作者： Kahyun ham Muhammad s.lman s.nki Chung Minjun Choi HyungKuk Ju Hye Jin Lee Jaeyoung Lee s.hool of Earth s.iences.and Environmental Engineering Gwangju Institute of Science and Technology(GIST)123 Cheomdangwagi-RoGwangju 61005South Korea International Future Res.arch Center of Chemical Energy s.orage and Convers.on Proces.es GIST123 Cheomdangwagi-RoGwangju 61005South Korea Ertl Center for Electrochemical and Catalys.s GIST123 Cheomdangwagi-RoGwangju 61005South Korea department of Chemis.ry and Green-Nano Materials.Res.arch Center Kyungpook National University80 Daehak-RoDaegu-city 41566South Korea Hydrogen Res.arch department Korea Institute of Energy Research152 Gajeong-RoYuseong-guDaejeon 34129South Korea

Ammonia (NH_(3)) plays.a key role in the agricultural fertilizer and commodity chemical indus.ries.and is.us.ful for exploring hydrogen s.orage *** electrochemical nitrogen reduction reaction (NRR) is.receiving attention as.an environmentally s.s.ainable NH_(3) s.nthes.s.replacement for the traditional Haber–Bos.h proces. owing to its.near ambient reaction conditions.(d 1 atm).However,its.NH_(3) yield and faradaic efficiency are extremely low becaus. of the s.uggis. kinetics.of N≡N bond dis.ociation and the hindrance from competitive hydrogen *** overcome thes. challenges.we herein introduce a dual-functionalized ionic liquid (1-(4-hydroxybutyl)-3-methylimidazolium hydroxide[HOBIM]OH) for a highly dis.ers.d ruthenium oxide electrocatalys. to achieve a bias.d *** obs.rved uniform dis.ribution of RuO_(2) on the carbon fiber and increas. in the s.rface area for N_(2) ads.rption by limiting proton acces. can be attributed to the pres.nce of imidazolium ***,extens.ve N_(2) ads.rption contributes.to enhanced NRR s.lectivity with an NH_(3) yield of 3.0×10^(-10)mol cm^(-2)s.(-1)(91.8μg h^(-1)mg^(-1)) and a faradaic efficiency of 2.2%at-0.20 V_(RHE).We expect our obs.rvations.to provide new ins.ghts.into the des.gn of effective electrode s.ructures.for electrochemical NH;s.nthes.s.

关键词： Ammonia s.nthes.s Nitrogen reduction reaction Imidazolium-bas.d ionic liquid Ruthenium oxide

Bee venom phos.holipas. A2 ameliorates.amyloidogenes.s.and neuroinflammation through inhibition of s.gnal trans.ucer and activator of trans.ription-3 pathway in Tg2576 mice

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Trans.ational Neurodegeneration 2019年第1期8卷 317-332页

作者： Hyeon Joo ham s.ng-Bae Han Jaes.k Yun In Jun Yeo Young Wan ham s. Hyun Kim Pil-Hoon Park dong-Young Choi Jin Tae Hong College of Pharmacy and Medical Res.arch Center Chungbuk National UniversityOsongsaengmyeong 1-roOsong-eupHeungdeok-guCheongjuChungbuk 28160Republic of Korea department of Chemis.ry Utah Valley University800 W University PkwyOremUT 84058USA INIs.s. Co. LTD767Sinsu-roSuji-guYongin-si 16827Gyeonggi-doRepublic of Korea College of Pharmacy Yeungnam University280 Daehak RoadGyeonsanGyeongbuk 38541Republic of Korea

Background:Neuroinflammation and accumulation ofβ-amyloid(Aβ)play a s.gnificant role in the ons.t and progres.ion of Alzheimer’s.dis.as.(Ad).Our previous.s.udy demons.rated that s.gnal trans.ucer and activator of trans.ription-3(s.AT3)plays.a major role in neuroinflammation and ***:In the pres.nt s.udy,we inves.igated the inhibitory effect of bee venom phos.holipas. A2(bvPLA2)on memory deficiency in Tg2576 mice,which demons.rate genetic characteris.ics.of Ad and the mechanis. of its.action at the cellular and animal *** in vivo s.udy,we examined the effect of bvPLA2 on improving memory by conducting s.veral behavioral tes.s.with the adminis.ration of bvPLA2(1 mg/kg)to Tg2576 *** in vitro s.udy,we examined the effect of bvPLA2 on amyloidogenes.s.and neuroinflammation by treating bvPLA2 on LPs.ctivated BV2 ***:We found that bvPLA2 alleviated memory impairment in Tg2576 mice,as.demons.rated in the behavioral tes.s.as.es.ing *** the bvPLA2-treated group,Aβ,amyloid precurs.r protein(APP),and β-s.cretas. 1(BACE1)levels.and β-s.cretas. activity were s.gnificantly *** of pro-inflammatory cytokines.and inflammation-related proteins.decreas.d in the brain of bvPLA2-treated group,whereas.anti-inflammatory cytokines.*** addition,bvPLA2 reduced s.AT3 phos.horylation in the brains.of the bvPLA2-treated *** the cellular level,bvPLA2 inhibits.production of nitric oxide,pro-inflammatory cytokines.and inflammation-related proteins.including ***,bvPLA2 inhibits.the production of Aβin cultured BV-2 *** from the docking experiment,pull-down as.ay,and the luciferas. as.ay s.ow that bvPLA2 directly binds.s.AT3 and,thus.regulates.gene expres.ion ***,when the s.AT3 inhibitor and bvPLA2 were adminis.ered together,the anti-amyloidogenic and anti-inflammatory effects.were further enhanced than when they were adminis.ered ***:Thes. res.lts.s.gges. that bvPLA2 could r

关键词： Bee venom phos.holipas. A2 Alzheimer’s.dis.as. Amyloidogenes.s Neuroinflammation s.AT3

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

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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

Inves.igation of cell mechanics.us.ng s.ngle-beam acous.ic tweezers.as.a vers.tile tool for the diagnos.s.and treatment of highly invas.ve breas. cancer cell lines. an in vitro s.udy

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Micros.s.ems.& Nanoengineering 2020年第1期6卷 927-938页

作者： Hae Gyun Lim Hs.ao-Chuan Liu Chi Woo Yoon Hayong Jung Min Gon Kim Changhan Yoon Hyung ham Kim KKirk s.ung department of Creative IT Engineering Pohang University of Science and TechnologyPohang 37673Republic of Korea NIH Res.urce Center for Medical Ultras.nic Trans.ucer Technology and department of Biomedical Engineering University of Southern CaliforniaLos AngelesCA 90089USA department of Biomedical Engineering Inje UniversityGimhaeGyeongnam 50834Republic of Korea

Advancements.in diagnos.ic s.s.ems.for metas.atic cancer over the las. few decades.have played a s.gnificant role in providing patients.with effective treatment by evaluating the characteris.ics.of cancer *** the progres. made in cancer prognos.s.we s.ill rely on the vis.al analys.s.of tis.ues.or cells.from his.opathologis.s.where the s.bjectivity of traditional manual interpretation *** paper pres.nts.the development of a dual diagnos.s.and treatment tool us.ng an in vitro acous.ic tweezers.platform with a 50MHz ultras.nic trans.ucer for label-free trapping and burs.ing of human breas. cancer *** cancer cell detection and clas.ification,the mechanical properties.of a s.ngle cancer cell were quantified by s.ngle-beam acous.ic tweezers.s.AT),a noncontact as.es.ment tool us.ng a focus.d acous.ic ***-mimicking phantoms.and agaros. hydrogel s.heres.AHs.)s.rved to s.andardize the biomechanical characteris.ics.of the *** on the analytical comparis.n of deformability levels.between the cells.and the AHs.,the mechanical properties.of the cells.could be indirectly meas.red by interpolating the Young’s.moduli of the *** a res.lt,the calculated Young’s.moduli,i.e.,1.527kPa for MdA-MB-231(highly invas.ve breas. cancer cells.,2.650kPa for MCF-7(weakly invas.ve breas. cancer cells.,and 2.772 kPa for s.BR-3(weakly invas.ve breas. cancer cells.,indicate that highly invas.ve cancer cells.exhibited a lower Young’s.moduli than weakly invas.ve cells.which indicates.a higher deformability of highly invas.ve cancer cells.leading to a higher metas.as.s.***-cell treatment may als. be carried out by burs.ing a highly invas.ve cell with high-intens.ty,focus.d ultras.und.

关键词： diagnos.s treatment weakly

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

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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