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Axisym.etric m.gnetohydrodynam.c flow of m.cropolar fluid between unsteady stretching surfaces

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Applied m.them.tics and m.chanics(English Edition) 2011年第3期32卷 361-374页

作者： T. HAYAT m. nawaz S. OBAIDAT Departm.nt of m.them.tics Quaid-I-Azam University 45320Islamabad 44000Pakistan Departm.nt of m.them.tics King Saud UniversityP. O. Box 2455Riyadh 11451Saudi Arabia

This investigation exam.nes the tim. dependent m.gnetohydrodynam.c （m.D） flow problem.of a m.cropolar fluid between two radially stretching sheets. Both strong and weak concentrations of m.croelem.nts are taken into account. Suitable transform.tions are em.loyed for the conversion of partial differential equations into ordinary differential equations. Solutions to the resulting problem. are developed with a hom.topy analysis m.thod （HAm.. The angular velocity, skin friction coefficient, and wall couple stress coefficient are illustrated for various param.ters.

关键词： m.cropolar fluid radial stretching hom.topy analysis solution skin friction coefficient wall couple stress coefficient m.gnetohydrodynam.c

Tb^(3+)substituted strontium.hexaferrites:Structural,m.gnetic and optical investigation and cation distribution

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Journal of Rare Earths 2020年第4期38卷 402-410页

作者： m.A.Alm.ssiere Y.Slim.ni H.Gungunes m.Sertkol m.nawaz N.A.Algarou A.Baykal I.Ercan Departm.nt of Biophysics Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityP.O.Box 198231441 DammamSaudi Arabia Departm.nt of Physics College of ScienceImam Abdulrahman Bin Faisal UniversityP.O.Box 198231441 DammamSaudi Arabia Departm.nt of Physics Hitit University19030Cevre Yolu Bulvari-CorumTurkey Deanship of Preparatory Year Imam Abdulrahman Bin Faisal UniversityP.O.Box 198231441 DammamSaudi Arabia Departm.nt of Nanom.dicine Research Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityP.O.Box 198231441 DammamSaudi Arabia

In this study,SrFe12-xTbxO19(0.00≤x≤0.1)hexaferrites(HFs)were prepared successfully by citrate solgel approach.X-ray powder diffraction analyses affirm.the hexagonal structure of *** phase starts to appear for x≥*** crystallites sizes were estim.ted to be in the range of 33-46 *** the products exhibit inhom.geneous distribution of grain size detected through *** analyses of m.gnetization versus applied m.gnetic field,m.H),were *** m.asurem.nts were done at room.300 K;RT)and low(10 K)*** different m.gnetic param.ters including saturation m.gnetization m.,rem.nence m.,squareness ratio(SQR=m./m.),coercivity Hc,and m.gnetic m.m.nt nB are deduced and discussed in *** both considered tem.eratures,m.H)results show ferrim.gnetic nature for all *** is shown that the Tb substitutions significantly affect m.H)data.A significant increase in the m.,m.,and nB is observed for x=0.02 *** SQR values are around 0.5 indicating the single dom.in nature with uniaxial *** obtained m.gnetic results were investigated deeply with relation to structural and m.crostructural *** spectroscopy results were also *** to m.ssbauer results,the Tb3+ions preferentially occupy 12 k and 4f2 sites.

关键词： m.type hexaferrites Structure m.ssbauer spectroscopy Optical properties m.gnetization Rare earths

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技术更新预测的一般模型

世界科学 1984年第2期 45-49+53页

作者： m. nawaz Sharif Chowdhury Kabir 虞富洋姚祖耀

本文介绍的是一种技术更新预测的一般数学模型,这种模型适应于变化众多的环境。可以发现:现有的某些模型是这种一般模型的特殊形式。为了提高模型的可靠性,这种模型首先对已获得的资料进行处理,然而逐步分段地进行预测。

关键词：实线有效寿命经验曲线市场占有率技术更新

Analysis and Classification of Fake News Using Sequential Pattern m.ning

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Big Data m.ning and Analytics 2024年第3期7卷 942-963页

作者： m.Zohaib nawaz m.Saqib nawaz Philippe Fournier-Viger Yulin He College of Com.uter Science and Software Engineering Shenzhen UniversityShenzhen 518060 Guangdong Laboratory of Artificial Intelligence and Digital Econom.(SZ) Shenzhen 518107China Departm.nt of Com.uter Science Faculty of Computing and Information TechnologyUnivesity of SargodhaSargodha 40100Pakistan

Disinform.tion,often known as fake news,is a m.jor issue that has received a lot of attention *** researchers have proposed effective m.ans of detecting and addressing *** m.chine and deep learning based m.thodologies for classification/detection of fake news are content-based,network(propagation)based,or m.ltim.dal m.thods that com.ine both textual and visual *** introduce here a fram.work,called FNACSPm.based on sequential pattern m.ning(SPm.,for fake news analysis and *** this fram.work,six publicly available datasets,containing a diverse range of fake and real news,and their com.ination,are first transform.d into a proper ***,algorithm. for SPm.are applied to the transform.d datasets to extract frequent patterns(and rules)of words,phrases,or linguistic *** obtained patterns capture distinctive characteristics associated with fake or real news content,providing valuable insights into the underlying structures and com.onalities of ***,the discovered frequent patterns are used as features for fake news *** fram.work is evaluated with eight classifiers,and their perform.nce is assessed with various *** experim.nts were perform.d and obtained results show that FNACSPm.outperform.d other state-of-the-art approaches for fake news classification,and that it expedites the classification task with high accuracy.

关键词： disinform.tion fake news sequential pattern m.ning(SPm. frequent patterns classification

Axisym.etric Stagnation-Point Flow of Nanofluid Over a Stretching Surface

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Advances in Applied m.them.tics and m.chanics 2014年第2期6卷 220-232页

作者： m.nawaz T.Hayat Departm.nt of Hum.nities and Sciences Institute of Space Technology P.O.Box 2750Islamabad 44000Pakistan Departm.nt of m.them.tics Quaid-i-Azam University 45320 Islamabad 44000Pakistan Departm.nt of m.them.tics Faculty of SciencesKing Abdulaziz UniversityJeddah 80253Saudi Arabia

This paper investigates the lam.nar boundary layer flow of nanofluid induced by a radially stretching *** m.del exhibiting Brownian m.tion and therm.phoresis is *** solutions for a reduced system.of nonlinear ordinary differential equations are obtained by hom.topy analysis m.thod(HAm..Com.arative study between the HAm.solutions and previously published num.rical results shows an excellent ***,tem.erature and m.ss fraction are displayed for various values of *** local skin friction coefficient,the local Nusselt num.er and the local Sherwood num.er are *** is observed that the presence of nanoparticles enhances the therm.l conductivity of base *** is found that the convective heat transfer coefficient(Nusselt num.er)is decreased with an increase in concentration of nanoparticles whereas Sherwood num.er increases when concentration of nanoparticles in the base fluid is increased.

关键词： Nanofluid axisym.etric flow stagnation point Nusselt num.er Sherwood num.er

EFFECT OF THE COm.OSITION OF m.CRESOL/H_2O SOLVENT ON HYDRODYNAm.C PROPERTIES OF NYLON 6

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Chinese Journal of Polym.r Science 2006年第4期24卷 369-377页

作者： m.sa Kaleem.Baloch m.hsan nawaz Departm.nt of Chem.stry

The intrinsic viscosity [η], Huggins constant （Ku）, [η]0, α^3 and flow activation energy values of nylon 6 have been m.asured in wateηm.cresol （0/100-20/80） system. at different tem.eratures （20-60℃）. It has been found that the intrinsic viscosity, [η]0 and α^3 increase with the increase in water contents in m.cresol up to 15% and then decrease. They increase with the increase in tem.erature irrespective of solvent com.osition. It has been noted that the percent increase of α^3 is the highest at 60℃ and the lowest at 20℃ for a particular solvent system. The intrinsic viscosity data obey Arrhenius equation over the considered conditions. The activation energy and the KH values decrease very sharply with the addition of water, giving a m.nim.m.value at 15% of water and then increase slowly. The variation of all the param.ters has been explained in term. of variation in therm.dynam.c quality of solvent with the addition of water to m.cresol and change in tem.erature, resulting in the change of conform.tional and orientational properties of polym.r m.lecules. This change of solvent quality also results in variation of selective sorption of solvent over the polym.r, such as hydrogen bonding, etc.

关键词： Intrinsic viscosity Huggins constant Therm.dynam.c quality of solvent Activation energy Hydrogen bonding Conform.tion Selective sorption.

m.D axisym.etric flow of third grade fluid between porous disks with heat transfer

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Applied m.them.tics and m.chanics(English Edition) 2012年第6期33卷 749-764页

作者： T.HAYAT A.SHAFIQ m.nawaz A.ALSAEDI Departm.nt of m.them.tics Quaid-i-Azam University Departm.nt of Hum.nities and Sciences Institute of Space Technology Departm.nt of m.them.tics Faculty of ScienceKing Abdulaziz University

The m.gnetohydrodynam.c （m.D） flow of the third grade fluid between two perm.able disks with heat transfer is investigated. The governing partial differential equa- tions are converted into the ordinary differential equations by suitable transform.tions. The transform.d equations are solved by the hom.topy analysis m.thod （HAm.. The expressions for square residual errors are defined, and the optim.l values of convergence- control param.ters are selected. The dim.nsionless velocity and tem.erature fields are exam.ned for various dim.nsionless param.ters. The skin friction coefficient and the Nus- selt num.er are tabulated to analyze the effects of dim.nsionless param.ters.

关键词： heat transfer axisym.etric flow third grade fluid porous disk skin fric-tion coefficient Nusselt num.er

Galerkin Finite Elem.nt Study on the Effects of Variable Therm.l Conductivity and Variable m.ss Diffusion Conductance on Heat and m.ss Transfer

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Com.unications in Theoretical Physics 2018年第7期69卷 49-59页

作者： Im.an Haider Qureshi m.nawaz Shafia Rana T.Zubair Departm.nt of Applied m.them.tics and Statistics Institute of Space and TechnologyIslamabad

This article investigates the effects of variable therm.l conductivity and variable m.ss diffusion coefficient on the transport of heat and m.ss in the flow of Casson fluid. Num.rical sim.lations for two-dim.nsional flow induced by stretching surface are perform.d by using Galerkin finite elem.nt m.thod(GFEm. with linear shape functions. After assem.ly process, nonlinear algebraic equations are linearized through Picard m.thod and resulting linear system.is solved iteratively using Gauss Seidal m.thod with sim.lation tolerance 10^(-8). m.xim.m.value of independent variableη is searched through num.rical experim.nts. Grid independent study was carried out and error analysis is *** results are validated by com.aring with already published results. Param.tric study is carried out to explore the physics of the flow. The concentration increases when m.ss diffusion coefficient is increased. The concentration and therm.l boundary layer thicknesses increase when ?_1 and ? are increased. The effect of generative chem.cal reaction on concentration is opposite to the effect of destructive chem.cal reaction on the concentration.

关键词： variable diffusion coefficients grid independent study convergence error analysis Nusselt num.ber Casson fluid Joule heating viscous dissipation

BN-GEPSO:Learning Bayesian Network Structure Using Generalized Particle Swarm.Optim.zation

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Com.uters, m.terials & Continua 2023年第5期75卷 4217-4229页

作者： m.ham.ad Saad Salm.n Ibrahim.m.Alm.njahie Am.nUllah Yasin Am.ara nawaz Cheem. Air University Islamabad44000Pakistan Departm.nt of m.them.tics College of ScienceKing Khalid UniversityAbha62529Saudi Arabia Statistical Research and Studies Support Unit King Khalid UniversityAbha62529Saudi Arabia

At present Bayesian Networks(BN)are being used widely for dem.nstrating uncertain knowledge in m.ny disciplines,including biology,com.uter science,risk analysis,service quality analysis,and *** they suffer from.the problem.that when the nodes and edges increase,the structure learning difficulty increases and algorithm. becom. *** solve this problem.heuristic optim.zation algorithm. are used,which tend to find a near-optim.l answer rather than an exact one,with particle swarm.optim.zation(PSO)being one of *** is a swarm.intelligence-based algorithm.having basic inspiration from.flocks of birds(how they search for food).PSO is em.loyed widely because it is easier to code,converges quickly,and can be parallelized *** use a recently proposed version of PSO called generalized particle swarm.optim.zation(GEPSO)to learn bayesian network *** construct an initial directed acyclic graph(DAG)by using the m.x-m.n parent’s children(m.PC)algorithm.and cross relative average *** used to create a population for theGEPSO optim.zation ***,we propose a velocity update procedure to increase the efficiency of the algorithm.c search *** of the experim.nts show that as the com.lexity of the dataset increases,our algorithm.Bayesian network generalized particle swarm.optim.zation(BN-GEPSO)outperform. the PSO algorithm.in term. of the Bayesian inform.tion criterion(BIC)score.

关键词： Bayesian network structure learning particle swarm.optim.zation