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Repercussion of Hall effect and nonlinear radiation on Couette-Poiseuille flow of Casson-Williamson fluid through upright microchannel

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Applied Mathematics and Mechanics(English Edition) 2022年第12期43卷 1951-1964页

作者： B.j.GIREESHA l.ANITHA Department of Post Graduation Studies and Research in Mathematics Kuvempu UniversityShankaraghatta 577451India Department of Mathematics Adichunchanagiri Institute of TechnologyChikkamagaluru 577102India

The main aim of the present work is to investigate the flow and heat transport properties of non-Newtonian Casson-Williamson fluid through an upright microchannel along with entropy generation analysis,and explore the effects of convective boundary conditions,Couette-Poiseuille flow,and nonlinear *** movement of liquid is scrutinized with the Hall effect and exponential heat *** rheological characteristics of the Casson-Williamson fluid model are also *** considering the desirable similarity variables,the equations of motion are reduced to nonlinear ordinary differential *** Runge-Kutta-Fehlberg fourth-fifth order method along with the shooting method is adopted to solve these dimensionless *** detailed investigation is pictorially displayed to show the influence of effective parameters on the entropy generation and the Bejan *** of the major tasks of the exploration is to compare the Casson fluid and the Williamson *** results show that the rate of heat transfer in the Casson fluid is more remarkable than that in the Williamson fluid.

关键词： entropy generation Bejan number convective boundary condition Hall effect nonlinear radiation exponential heat source

Plasticity of Xyloglucan Composition in Bean （Phaseolus vulgaris）-Cultured Cells during Habituation and Dehabituation to lethal Concentrations of Dichlobenil

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Molecular Plant 2010年第3期3卷 603-609页

作者： A. Alonso-Simon l. Neumetzler R Garcia-Angulo A.E. Encina j.l. Acebes j.M. Alvarez T. Hayashi Area de Fisiologia Vegetal Universidad de Leon E-24071 Leon Spain Max Planck Institute of Molecular Plant Physiology 14476 Golm Germany Kyoto University RISH Gokasho Uji Kyoto 611-0011 Japan

Bean cells that have been habituated to grow in a lethal concentration （12 μM） of 2,6-dichlorobenzonitrile （dichlobenil or DCB, a cellulose biosynthesis inhibitor） are known to have decreased cellulose content in their cell walls. Xyloglucan, which is bound to cellulose and together with it forms the main loading network of plant cell walls, has also been described to decrease in habituated cells, but whether the change on cellulose affects the xyloglucan structure besides its abundance has not been analyzed. Fragmentation analysis with xyloglucan-specific endoglucanase （XEG） and endocellulase revealed that habituation to DCB caused a change in the fine structure of xyloglucan, namely a decrease in fucosyl residues attached to the galactosyl-xylosyl residues along the glucan backbone. After the removal of herbicide from the medium （dehabituated cells）, xyloglucan recovered its fucosyl residues. In addition, some cello-oligosaccharides could be detected only in habituated cells＇ xyloglucan digested by XEG and endocellulase, corresponding to a glucan co- valently bound or co-precipitated with the hemicelluloses. These results show that structural flexibility of cell walls relies in part on the plasticity of xyloglucan composition and opens up new perspectives to further research in this field.

关键词： Bean 2,6-dichlorobenzonitrile habituation and dehabituation OlIMP (Oligosaccharides Mass Profiling) xyloglucan.

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用截面变形耦合有限元法分析复合材料梁

应用数学和力学 2006年第12期27卷 1497-1505页

作者：姜文光 j.l.亨帅扶名福（推荐）燕山大学机械工程学院秦皇岛066004 布里斯托尔大学航天工程系 BS81TR英国；诺丁汉特伦特大学机械和制造工程系诺丁汉NG14BU英国不详

复合材料板和梁具有优良的特性,从而获得了广泛的应用·然而由于材料的各向异性,使得对这类材料构件作变形和应力分析时,即使应用如有限元法的数值分析手段仍是非常复杂费时的·为此提出了一个可应用常规有限单元法,分析等截面复合材料... 详细信息

复合材料板和梁具有优良的特性,从而获得了广泛的应用·然而由于材料的各向异性,使得对这类材料构件作变形和应力分析时,即使应用如有限元法的数值分析手段仍是非常复杂费时的·为此提出了一个可应用常规有限单元法,分析等截面复合材料梁承受均匀拉弯扭载荷的一个简单精确分析的实施方法·由于巧妙地利用了变形的对称特性,使得分析只需建立在梁的一个切片构造的几何模型上,用常规三维实体有限单元进行结构离散·推导了精确的变形场模式,并借助结构平移自由度的耦合关系使得数值分析易于实施·并通过数值算例来阐明方法的实施过程·

关键词：复合材料等截面梁耦合方程有限单元法拉伸弯曲扭转

A novel approach to enhance decrepitation temperature and reducibility of ultrafine iron ore concentrate pellets

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journal of Iron and Steel Research International 2024年第11期31卷 2622-2632页

作者： B.l.Wen Z.H.Fan j.X.li D.l.liu j.l.Yang School of Metallurgical Engineering Anhui University of TechnologyMa'anshan 243032AnhuiChina jianlong(liaoning)Energy Saving and Environmental Protection

Utilizing ultrafine iron ore concentrate for pellet production can expand domestic iron ore resources in China and promote the utilization of low-grade ***,a challenge arises with the low decrepitation temperature and reducibility in the preparation process of ultrafine iron ore concentrate *** address the challenge,a novel approach was proposed,which incorporated straw powder as an additive to enhance pellet porosity,thereby improving the decrepitation temper-ature and reducibility of ultrafine iron ore concentrate *** effect of varying proportions of straw powder(0.0-2.0%)on the characteristics of ultrafine iron ore concentrate pellets was *** indicate that at a 2.0%straw powder ratio,pellet decrepitation temperature notably rises from 380 to 540℃,while the reducibility index escalates from 25.7%to 48.1%.Nevertheless,the addition of straw powder results in diminished drop strength,compressive strength of green pellets,and cold crushing strength of fired *** addition,enhanced pellet reducibility leads to exacerbated reduction swelling index and reduction degradation *** these effects,all parameters remain within an acceptable range.

关键词： Ultrafine iron ore concentrate:Straw powder Green pellet quality Decrepitation temperature:Metallurgical property

Organic light Emitting Diodes with lithium Contained Alq3 as Electron Injection layer

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Chemical Research in Chinese Universities 2002年第2期18卷 121-123页

作者： Zugang liu j.l.Pinto Department of Materials University of OxfordParks RoadOxford OX13PFUK Departamento de Física Universidade de Aveiro3810194 AveiroPortuga

lNovel lithium doped tris 8 hydroxylquinoline aluminium(Alq3:li) layer is deposited between emission layer and electron injection aluminium electrode as an electron injection assistant layer in different organic light emitting diodes(OlED) to lower the electron injection barrier. In these devices, Alq3 is used as emission layer, and a bilayer film of N,N bis (1 naphhyl) N,N diphenyl 1,1 biphenyle 4,4' diamine(NPB) and 4,4,4' tris(3 methyl phenylphenylamino) triphenylamine( m MTDATA) used as hole transport layer(HTl). The electroluminescent performance of devices with different thicknesses of Alq3∶li shows that the insertion of the lithium doped Alq3 layer can reduce the turn on voltage by at least 2 volts, and the stability of devices with this lithium doped Alq3 layer is improved too. It can also change the efficiency of devices. Compared with an ultra thin lithium fluoride(liF) layer, Alq3∶li sheet gives similar effects but higher efficiency and can be much thicker and hence it is easier to control the deposition.

关键词： Organic light emitting diodes lithium layer Alq3 EI

Design and Robust Performance Evaluation of a Fractional Order PID Controller Applied to a DC Motor

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IEEE/CAA journal of Automatica Sinica 2017年第2期4卷 304-314页

作者： j.Viola l.Angel j.M.Sebastian Universidad Pontificia Bolivariana Universidad Politecnica de Madrid Centre for Automation and Robotics (CAR) UPM-CSIC

This paper proposes a methodology for the quantitative robustness evaluation of PID controllers employed in a DC motor. The robustness analysis is performed employing a 2~3 factorial experimental design for a fractional order proportional integral and derivative controller(FOPID), integer order proportional integral and derivative controller(IOPID)and the Skogestad internal model control controller(SIMC). The factors assumed in experiment are the presence of random noise,external disturbances in the system input and variable load. As output variables, the experimental design employs the system step response and the controller action. Practical implementation of FOPID and IOPID controllers uses the MATlAB stateflow toolbox and a NI data acquisition system. Results of the robustness analysis show that the FOPID controller has a better performance and robust stability against the experiment factors.

关键词： Factorial experimental design fractional-order PID controller robustness analysis SIMC PID controller

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21世纪制图学和有空间知识的大众

地理译报 1995年第1期14卷 59-63,58页

作者： j.l.麦里森付安良

导言最近制图学经历了技术迅速革命的第一个浪潮。这次革命不仅影响着制图学,而且影响了发达国家的整个民众,在某种程度上对发展中国家的民众也产生影响。地图学家有一门相当传统严谨的学科,其对技术革命的第一个浪潮所做的反应就可想... 详细信息

导言最近制图学经历了技术迅速革命的第一个浪潮。这次革命不仅影响着制图学,而且影响了发达国家的整个民众,在某种程度上对发展中国家的民众也产生影响。地图学家有一门相当传统严谨的学科,其对技术革命的第一个浪潮所做的反应就可想而知了。制图学家现在运用数字技术可以生产出与模拟制图万法所制作的最好地图相媲美的地图。

关键词：制图学空间知识 21世纪

Frictionally excited thermoelastic dynamic instability of functionally graded materials

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Acta Mechanica Sinica 2019年第1期35卷 99-111,I0004页

作者： j.l.u l.l.Ke Y.S.Wang College of Engineering Huazhong Agricultural UniversityWuhan 430070China Institute of Engineering Mechanics Beijing JiaotongUniversity Beijing 100044China

The perturbation method is applied to investigate the frictionally excited thermoelastic dynamic instability (TEDI) of a functionally graded material (FGM) coating in half-plane sliding against a homogeneous half-plane. We assume that the thermoelastic properties of the FGM vary exponentially with thickness. We also examine the effects of the gradient index, sliding speed, and friction coefficient on the TEDI for various material combinations. The transverse normal stress for two different coating structures is calculated. Furthermore, the frictional sliding stability of two different coating structures is analyzed. The obtained results show that use of FGM coatings can improve the TEDI of this sliding system and reduce the possibility of interfacial failure by controlling the interfacial tensile stress.

关键词： Thermoelastic dynamic instability Frictional heat Functionally graded materials Stress analysis