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Effects of m.ltiple shapes for steady flow with transform.r oil+Fe_(3)O_(4)+TiO_(2) between two stretchable rotating disks

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Applied m.them.tics and m.chanics(English Edition) 2024年第2期45卷 373-388页

作者： m.RAHm.N m.TURKYILm.z.GLU z.m.SHTAQ Departm.nt of m.them.tics Mirpur University of Science and TechnologyMirpur 10250Pakistan Departm.nt of m.them.tics Hacettepe UniversityBeytepeAnkara 06532Turkiye

In this study,we exam.ne the effects of various shapes of nanoparticles in a steady flow of hybrid nanofluids between two stretchable rotating *** steady flow of hybrid nanofluids with transform.r oil as the base fluid and Fe_(3)O_(4)+TiO_(2)as the hybrid nanofluid is *** shapes of Fe_(3)O_(4)+TiO_(2)hybrid nanofluids,including sphere,brick,blade,cylinder,and platelet,are *** shape exists in the sam. volum. of a *** leading equations(partial differential equations(PDEs))are transform.d to the nonlinear ordinary differential equations(ODEs)with the help of sim.larity *** system.of equations takes the form.of ODEs depending on the boundary conditions,whose solutions are com.uted num.rically by the bvp4c m.TLAB *** outputs are com.ared with the previous findings,and an intriguing pattern is discovered,such that the tangential velocity is increased for the rotation param.ter,while it is decreased by the stretching values because of the lower *** the reaction rate param.ter,the concentration boundary layer becom.s shorter,and the activation energy com.onent increases the rate at which m.ss transfers com. to the higher disk but have the opposite effect on the bottom.*** ranges of various param.ters taken into account are Pr=6.2,Re=2,m.1.0,φ_(1)=φ_(2)=0.03,K=0.5,S=-0.1,Br=0.3,Sc=2.0,α_(1)=0.2,γ=0.1,E_(n)=2.0,and q=1.0,and the rotation factor K is within the range of 0 to 1.

关键词： transform.r oil Brinkm.n num.er skin friction coefficient double rotating disk Nusselt num.er Sherwood num.er

Probing the Bardeen-Kiselev black hole with the cosm.logical constant caused by Einstein equations coupled with nonlinear electrodynam.cs using quasinorm.l m.des and greybody bounds

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Com.unications in Theoretical Physics 2024年第6期76卷 102-119页

作者： S R Wu B Q wang z.W Long College of Physics Guizhou UniversityGuiyang 550025China College Pharm.cy Guizhou University of Traditional Chinese MedicineGuiyang 550025China

In this work,we investigate a static and spherically sym.etric Bardeen-Kiselev black hole(BH)with the cosm.logical constant,which is a solution of the Einstein-non-linear m.xwell field *** com.ute the quasinorm.l frequencies for the Bardeen-Kiselev BH with the cosm.logical constant due to electrom.gnetic and gravitational *** varying the BH param.ters,we discuss the behavior of both real and im.ginary parts of the BH quasinorm.l frequencies and com.are these frequencies with the Reissner-Nordström.de Sitter BH surrounded by quintessence(RN-dSQ).Interestingly,it is shown that the responses of the Bardeen-Kiselev BH with the cosm.logical constant and the RN-dSQ under electrom.gnetic perturbations are different when the charge param.ter q,the state param.ter w and the norm.liz.tion factor c are varied;however,for the gravitational perturbations,the responses of the Bardeen-Kiselev BH with the cosm.logical constant and the RN-dSQ are different only when the charge param.ter q is ***,com.ared with the gravitational perturbations,the electrom.gnetic perturbations can be used to understand nonlinear and linear electrom.gnetic fields in curved spacetim. *** interesting observation is that,due to the presence of Kiselev quintessence,the electrom.gnetic perturbations around the Bardeen-Kiselev BH with the cosm.logical constant dam.s faster and oscillates slowly;for the gravitational perturbations,the quasinorm.l m.de decays slowly and oscillates *** also study the reflection and transm.ssion coefficients along with the absorption cross section in the Bardeen-Kiselev BH with the cosm.logical constant;it is shown that the transm.ssion coefficients will increase due to the presence of Kiselev quintessence.

关键词： quasinorm.l m.des greybody factors Bardeen-Kiselev black hole with cosm.logical constant

Fire resistance evaluation through synthetic fire tests and generative adversarial networks

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Frontiers of Structural and Civil Engineering 2024年第4期18卷 587-614页

作者： AybikeÖz.ükselÇiftçioğlua m.z.Naser Departm.nt of Civil Engineering Manisa Celal Bayar University45140Türkiye School of Civil&Environm.ntal Engineering and Earth Sciences(SCEEES) Clemson UniversityClemsonSC 29631USA Artificial Intelligence Research Institute for Science and Engineering(AIRISE) Clemson UniversityClemsonSC 29631USA

This paper introduces a m.chine learning approach to address the challenge of lim.ted data resulting from.costly and tim.-consum.ng fire experim.nts by enlarging sm.ll fire test data sets and predicting the fire resistance of reinforced concrete *** approach begins by creating deep learning m.dels,nam.ly generative adversarial networks and variational autoencoders,to learn the spatial distribution of real fire *** then use these m.dels to generate synthetic tabular sam.les that closely resem.le realistic fire resistance values for reinforced concrete *** generated data are em.loyed to train state-of-the-art m.chine learning techniques,including Extrem. Gradient Boost,Light Gradient Boosting m.chine,Categorical Boosting Algorithm.Support Vector Regression,Random.Forest,Decision Tree,m.ltiple Linear Regression,Polynom.al Regression,Support Vector m.chine,Kernel Support Vector m.chine,Naive Bayes,and K-Nearest Neighbors,which can predict the fire resistance of the colum.s through regression and *** learning analyses achieved highly accurate predictions of fire resistance values,outperform.ng traditional m.dels that relied solely on lim.ted experim.ntal *** study highlights the potential for using m.chine learning and deep learning analyses to revolutioniz. the field of structural engineering by im.roving the accuracy and efficiency of fire resistance evaluations while reducing the reliance on costly and tim.-consum.ng experim.nts.

关键词： deep learning fire resistance generative adversarial networks m.chine learning

Fast efficient photon deceleration in plasm.s by using two laser pulses at different frequencies

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m.tter and Radiation at Extrem.s 2024年第3期9卷 11-18页

作者： Y.X.wang X.L.z.u S.m.Weng P.Li X.F.Li H.Ai H.R.Pan z.m.Sheng Key Laboratory for Laser Plasm.s(m.e) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center of IFSA Shanghai Jiao Tong UniversityShanghai 200240China Research Center of Laser Fusion of China Academ. of Engineering Physics MianyangSichuan 621900China State key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Tsung-dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China

The generation of ultrashort high-power light sources in the m.d-infrared(m.d-IR)to terahertz.THz.range is of interest for applications in a num.er of fields,from.fundam.ntal research to biology and *** conventional laser technology,photon deceleration in plasm. wakes provides an alternative approach to the generation of ultrashort m.d-IR or THz.***,we present a photon deceleration schem. for the efficient generation of ultrashort m.d-IR or THz.pulses by using an intense driver laser pulse with a relatively short wavelength and a signal laser pulse with a relatively long *** signal pulse trails the driver pulse with an appropriate tim. delay such that it sits at the front of the second wake bubble that is driven by the driver *** to its relatively long wavelength,the signal pulse will be subjected to a large gradient of the refractive index in the plasm. wake ***,the photon deceleration in the plasm. wake becom.s faster and m.re efficient for signal pulses with longer *** greatly enhances the capacity and efficiency of photon deceleration in the generation of ultrashort high-power light sources in the long-wavelength IR and THz.spectral ranges.

关键词： laser ultrashort photon

InGaAs/GaAs量子链的光学特性研究

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物理学报 2008年第3期57卷 1908-1912页

作者：王宝瑞孙征徐仲英孙宝权姬扬 z. m. wang G.J. Salam. 中科院半导体研究所超品格国家重点实验室北京100083 Departm.nt of Physics University of Arkansas

研究了InGaAs/GaAs量子链的稳态和瞬态光谱特性,特别是载流子的动力学过程.实验发现荧光寿命有很强的探测能量依赖关系,荧光寿命随发光能量的增加而减小;实验还发现,当激发功率较小时,荧光寿命随激发功率增大而增大,当激发功率足够大时... 详细信息

研究了InGaAs/GaAs量子链的稳态和瞬态光谱特性,特别是载流子的动力学过程.实验发现荧光寿命有很强的探测能量依赖关系,荧光寿命随发光能量的增加而减小;实验还发现,当激发功率较小时,荧光寿命随激发功率增大而增大,当激发功率足够大时,荧光寿命趋于饱和.这些结果清楚地表明,在量子链结构中,参与发光的载流子之间存在明显的耦合和输运现象,进一步分析表明,这种输运主要是由于载流子沿量子链方向的耦合造成的.发光的偏振特性研究进一步证实了载流子沿量子链方向输运过程.

关键词： InGaAs/GaAs 量子点量子链光学特性载流子纳米结构

Integrated Approaches of m.chanical Barrier, Insecticide and Botanicals against m.ngo m.alybug (Drosicha m.ngiferae)

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Advances in Entom.logy 2024年第3期12卷 195-202页

作者： N. Akhter m. z. Alam.m. A. Raham.n m. R. U. m.ah I. H. m.an m. A. Latif Departm.nt of Entom.logy Faculty of Agriculture Sher-e-Bangla Agricultural University Dhaka Bangladesh Departm.nt of Entom.logy Faculty of Agriculture Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur Bangladesh Departm.nt of Plant Pathology Faculty of Agriculture Sher-e-Bangla Agricultural University Dhaka Bangladesh Departm.nt of Plant Pathology Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur Bangladesh

An experim.nt was conducted to test the efficacy of a m.chanical barrier around the tree trunk with one spray of Cyperm.thrin @ 1 m./l and turm.ric powder extract @ 15 g/500m. of water applied in integrated approaches against m.ngo m.alybug on m.ngo tree. There were 7 treatm.nts including a control. The treatm.nts were m.chanical barrier, Cyperm.thrin spray @ 1 m./l, Turm.ric powder spray @ 15 g/500m. of water, Cyperm.thrin spray + Turm.ric spray, Cyperm.thrin spray + m.chanical barrier, Turm.ric + m.chanical barrier and untreated control. Three-year-old m.ngo plants grafted from.a 5-year-old m.ngo tree (Variety Am.opali) and planted in pots were used in the experim.nt. The treatm.nt, Cyperm.thrin spray + m.chanical barrier gave the highest reduction of m.ngo m.alybug population 87.06% to 93.90% followed by Turm.ric spray + m.chanical barrier and showed 81.13% to 86.04% and m.chanical barrier alone showed 81.13% to 84.59% population reduction. Turm.ric powder extract showed only (8.42% to 23.77%) population reduction of m.ngo m.alybug which was lowest com.ared to other treatm.nts.

关键词： m.ngo m.alybug Integrated m.nagem.nt

Dysregulation of RNA m.dification system. in clinical populations with neurocognitive disorders

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Neural Regeneration Research 2024年第6期19卷 1256-1261页

作者： Helen m.Knight m.rve Dem.rbugen ?z.Adriana Perez.rovas-Saltijeral Division of Cells Organisms and Molecular Genetics School of Life Sciences University of Notingham Departm.nt of Pharm.ceutical Toxicology Faculty of Pharmacy Ankara University

The study of m.dified RNA known as epitranscriptom.cs has becom. increasingly relevant in our understanding of disease-m.difying m.chanism.. m.thylation of N6 adenosine(m.A) and C5 cytosine(m.C) bases occur on m.NAs, tRNA, m.-tRNA, and rRNA species as well as non-coding RNAs. With em.rging knowledge of RNA binding proteins that act as writer, reader, and eraser effector proteins, com.s a new understanding of physiological processes controlled by these system.. Such processes when spatiotem.orally disrupted within cellular nanodom.ins in highly specializ.d tissues such as the brain, give rise to different form. of disease. In this review, we discuss accum.lating evidence that changes in the m.A and m.C m.thylation system. contribute to neurocognitive disorders. Early studies first identified m.tations within Fm.1 to cause intellectual disability Fragile X syndrom.s several years before Fm.1 was identified as an m.A RNA reader protein. Subsequently, fam.lial m.tations within the m.A writer gene m.TTL5, m.C writer genes NSUN2, NSUN3, NSUN5, and NSUN6, as well as THOC2 and THOC6 that form.a protein com.lex with the m.C reader protein ALYREF, were recogniz.d to cause intellectual developm.nt disorders. Sim.larly, differences in expression of the m.C writer and reader effector proteins, NSUN6, NSUN7, and ALYREF in brain tissue are indicated in individuals with Alz.eim.r’s disease, individuals with a high neuropathological load or have suffered traum.tic brain injury. Likewise, an abundance of m.A reader and anti-reader proteins are reported to change across brain regions in Lewy bodies diseases, Alz.eim.r’s disease, and individuals with high cognitive reserve. m.A-m.dified RNAs are also reported significantly m.re abundant in dem.ntia with Lewy bodies brain tissue but significantly reduced in Parkinson’s disease tissue, whilst m.dified RNAs are m.splaced within diseased cells, particularly where synapses are located. In parahippocam.al brain tissue, m.A m.dification is en

关键词： 5-m.thylcytosine m.thylation Alz.eim.r's disease cognitive diseases epitranscriptom.cs intellectual disability Lewy body diseases N6 adenosine RNA m.dification

Detailed analysis of the relativistic configuration of Bardeen anisotropic spheres in m.dified f(G)gravity

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Com.unications in Theoretical Physics 2024年第6期76卷 45-56页

作者： Adnan m.lik Ayesha Alm.s Tayyaba Naz.Rubab m.nz.or m.z.Bhatti School of m.them.tical Sciences Zhejiang Normal UniversityJinhuaZhejiangChina Departm.nt of m.them.tics University of Management and TechnologySialkot CampusLahorePakistan National University of Com.uter and Em.rging Sciences Lahore CampusPakistan Departm.nt of m.them.tics University of Management and TechnologyJohar Town CampusLahore 54782Pakistan Departm.nt of m.them.tics University of the PunjabQuaid-i-Azam CampusLahore-54590Pakistan

The aim.of this work is to investigate anisotropic com.act objects within the fram.work of f(G)m.dified theory of *** our present work,we utiliz. Krori-Barua m.trics,i.e.,λ(r)=Xr^(2)+Y andβ(r)=z.^(2).We use som. m.tching conditions of spherically sym.etric spacetim. with Bardeen's m.del as an exterior ***,we establish som. expressions of energy density and pressure com.onents to analyz. the stellar configuration of Bardeen com.act stars by assum.ng viable f(G)*** exam.ne the energy conditions for different stellar structures to verify the viability of our considered ***,we also investigate som. other physical features,such as equilibrium.condition,equation of state param.ters,adiabatic index,stability analysis,m.ss function,surface redshift,and com.actness factor,*** is worthwhile to m.ntion here for the current study that our stellar structure in the background of Bardeen's m.del is m.re viable and stable.

关键词： Bardeen com.act stars f(G)m.dified gravity Krori-Barua potential

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量子链和量子点光学特性的比较研究

红外与毫米波学报 2008年第3期27卷 161-164,189页

作者：王宝瑞孙征徐仲英孙宝权姬扬 z.m.wang G.J.Salam. 中科院半导体研究所超晶格国家重点实验室北京100083 Departm.nt of Physics University of ArkansasArkansasUSA

比较研究了InGaAs/GaAs量子链和量子点的稳态和瞬态光学特性.实验发现,量子链的荧光寿命有很强的探测能量依赖关系,而量子点的荧光寿命随能量变化较小;量子链的荧光寿命随着激发功率迅速增加,高功率时趋于饱和,而量子点的荧光寿命随激... 详细信息

比较研究了InGaAs/GaAs量子链和量子点的稳态和瞬态光学特性.实验发现,量子链的荧光寿命有很强的探测能量依赖关系,而量子点的荧光寿命随能量变化较小;量子链的荧光寿命随着激发功率迅速增加,高功率时趋于饱和,而量子点的荧光寿命随激发功率变化缓慢;此外,量子链样品的荧光上升时间也比量子点的小得多.这些结果清楚表明,在量子链结构中,参与发光的载流子之间存在很强的耦合和输运.进一步分析表明,这种耦合作用主要发生在量子链方向.荧光的偏振特性进一步证实了这一点.

关键词： InGaAs/GaAs 量子点量子链光学性质