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Graphene's photonic and optoelectronic properties——A review

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Chinese physics B 2020年第3期29卷 13-35页

作者： A j Wirth-Lima p p Alves-Sousa W Bezerra-Fraga Department of physics Federal Institute of EducationScience and Technology of Ceara Campus SobralCearaBrazil postgraduate program in Electrical Engineering and Computing Federal University of Ceara(U.F.C.)Sobral CearaBrazil

Due to its remarkable electrical and optical properties,graphene continues to receive more and more attention from researchers around the *** excellent advantage of graphene is the possibility of controlling its charge density,and consequently,the management of its conductivity and dielectric constant,among other *** is noteworthy that the control of these properties enables the obtaining of new optical/electronic devices,which would not exist based on conventional ***,to work in this area of science,it is necessary to have a thorough knowledge regarding the electrical/optical properties of *** this review paper,we show these graphene properties very well detailed.

关键词： absorbance conductivity dielecric constant dispersion relation

Selection of digital fabrication technique in the construction industry--A multi-criteria decision-making approach

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Frontiers of Structural and Civil Engineering 2024年第7期18卷 977-997页

作者： M.p.SALAIMANIMAGUDAM j.jAYApRAKASH Department of Structural and Geotechnical Engineering School of Civil EngineeringVellore Institute of TechnologyVellore 632014India

Digital fabrication techniques,in recent decades,have provided the basis of a sustainable revolution in the construction ***,selecting the digital fabrication method in terms of manufacturability and functionality requirements is a complex *** paper presents alternatives and criteria for selection of digital fabrication techniques by adopting the multi-criteria decision-making *** alternatives considered in the study are concrete three-dimensional(3D)printing,shotcrete,smart dynamic casting,material intrusion,mesh molding,injection concrete 3D printing,and thin forming *** criteria include formwork utilization,reinforcement incorporation,geometrical complexity,material enhancement,assembly complexity,surface finish,and build *** demonstrates different multi-criteria decision-making techniques,with both subjective and objective weighting *** given ranking is based on the current condition of digital fabrication in the construction *** study reveals that in the selection of digital fabrication techniques,the criteria including reinforcement incorporation,build area,and geometrical complexity play a pivotal role,collectively accounting for nearly 70% of the overall *** the evaluated techniques,concrete 3D printing emerged as the best performer,however the shotcrete and mesh molding techniques in the second and third positions.

关键词： digital fabrication multicriteria decision-making concrete 3D printing

A Class of Quasi-exact Solutions of Rabi Hamiltonian

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Communications in Theoretical physics 2007年第7期48卷 53-56页

作者： j.p.Draayer Department of physics and Astronomy Louisiana State UniversityBaton RougeLA 70803-4001USA

A class of quasi-exact solutions of the Rabi Hamiltonian,which describes a two-level atom interacting witha single-mode radiation field via a dipole interaction without the rotating-wave approximation,are obtained by using awavefunction *** solutions for part of the spectrum are obtained when the atom-field coupling strength and thefield frequency satisfy certain *** an example,the lowest exact energy level and the corresponding atom-fieldentanglement at the quasi-exactly solvable point are calculated and compared to results from the jaynes-Cummings andcounter-rotating cases of the Rabi Hamiltonian.

关键词： Rabi Hamiltonian quasi-exact solutions energy spectrum atom-field entanglement

Heat Transfer to Foods: Modelling and Validation

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journal of Thermal Science 2002年第4期11卷 320-330页

作者： p.W.Cox p.j.Fryer Centre for Formulation Engineering Chemical Engineering University of BirminghamCentre for Formulation Engineering Chemical Engineering University of Birmingham Edgbaston Birmingham UK Edgbaston Birmingham UK

The food industry uses a wide variety of processes which are not well understood. Current modelling and measurement approaches are reviewed, with specific reference to work at Birmingham on particle tracking (pEpT) an... 详细信息

关键词： heat transfer food processing.

INTERACTIONS BETWEEN KETONES AND AMINES IN pHOTOINITIATING SYSTEMS USED FOR RADICAL pOLYMERIZATION

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Chinese journal of polymer Science 1990年第1期8卷 51-60页

作者：吴世康 FOUASSIER j.p. Laboratoire

Time resolved laser spectroscopy and GC/MS were used to investigate the primary processes and the side reactions occurring in benzophenone and chlorothioxanthone/amine systems used as photoinitiators of radical polymerization. The discrepancy observed between the experimental data and the expected behaviour is accounted for by detrimental chemical reaction involving the ketone triplet state, the ketyl radical and the amine-derived radical.

关键词： photoinitiating systems photopolymerization Benzophenone/Amine system Chlorothioxanthone/Amine system Light absorbing transient (LAT).

Systematic oil flow modeling in the Quasi-3D approximation yields additional terms that allows for variable cross-section area tubing

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petroleum 2021年第1期7卷 53-63页

作者： Edval j.p.Santos Laboratory for Devices and Nanostructures Engineering at the Nanometer Scale GroupUniversidade Federal de Pernambuco-UFPERecifeBrazil

A systematic model development for oil flow in quasi-3D(1Dþ2D)is *** approach provides a unified modeling ***,additional terms are obtained,which allows for tubing area variation along the flow *** area variation can be modeled as analytic function or random fluctuation,as it could be the result of deposits or tubing internal surface *** proposed approach can be used to obtain analytic solutions which provide physical insight into the phenomena under scrutiny,including the validation of software tools,sensor development and sensor *** starts from conservation laws as given by kinetic theory and applies the transverse averaging technique(TAT)to extract the one-dimensional approximation in formal *** demonstrate its application,the steady-state Ramey’s model,the Hasan’s transient model and a simple two-phase model are generated from the obtained equations.

关键词： Conservation equation Flow model Two-phase flow Ramey’s model Hasan’s model

Effect of Matching Algorithm and profile Shape on pulsar pulse Time of Arrival Uncertainties

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Research in Astronomy and Astrophysics 2023年第12期23卷 230-241页

作者： j.Wang j.p.W.Verbiest G.M.Shaifullah j.p.Yuan Ruhr-Universität Bochum Fakultät für Physik und AstronomieAstronomisches Institut(AIRUB)D-44801 BochumGermany Advanced Institute of Natural Sciences Beijing Normal UniversityZhuhai 519087China Fakulatät für physik Universität BielefeldPostfach 100131D-33501 BielefeldGermany Max-planck-Institut für Radioastronomie Auf dem Hügel 69D-53121 BonnGermany Florida Space Institute University of Central Florida12354 Research ParkwayOrlandoFL 32826USA Dipartimento di Fisica"G.Occhialini "Universitádegli Studi di Milano-BicoccaPiazza della Scienza 3I-20126 MilanoItaly INFN Sezione di Milano-BicoccaPiazza della Scienza 3I-20126 MilanoItaly Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Key Laboratory of Radio Astronomy Chinese Academy of SciencesNanjing 210008China INAF-Osservatorio Astronomico di Cagliari via della Scienza 509047 Selargius(CA)Italy

For high-precision pulsar timing analysis and low-frequency gravitational wave detection,it is essential to accurately determine pulsar pulse times of arrival(ToAs)and associated *** measure the ToAs and their uncertainties,various cross-correlation-based techniques can be *** develop methodologies to investigate the impact of the template-matching method,profile shape,signal-to-noise ratio of both template and observation on ToA *** methodologies are then applied to data from the International pulsar Timing *** demonstrate that the Fourier domain Markov chain Monte Carlo method is generally superior to other methods,while the Gaussian interpolation shift method outperforms other methods in certain cases,such as profiles with large duty cycles or smooth profiles without sharp ***,it is important to note that our study focuses solely on ToA uncertainty,and the optimal method for determining both ToA and ToA uncertainty may differ.

关键词： methods data analysis-(stars:)pulsars general-methods statistical

Secondary Silicates as a Barrier to Carbon Capture and Storage in Deccan Basalt

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Acta Geologica Sinica(English Edition) 2020年第3期94卷 861-876页

作者： Amit KUMAR j.p. SHRIVASTAVA Department of Geology University of DelhiDelhi 110007India

Investigating the immobilization of CO2,previous basalt-water-CO2 interaction studies revealed the formation of carbonates over a short period,but with the extensive formation of secondary silicates(SS).The mechanisms involved in these processes remain unresolved,so the present study was undertaken to understand secondary mineral formation *** and Rietveld refinement data for neo-formed minerals show a drastic decrease in the Ca-O bond length,with the calcite structure degenerating after 80 h(hours).However,SEM images and EDS data revealed that a longer interaction time resulted in the formation of chlorite and smectite,adjacent to basalt grains which prevent basaltwater-CO2 interaction to form carbonates,thus restricting carbonate *** a result of this,the CO2 mineralization rate is initially high(till 80 h),but it later reduces *** is evident that,for such temperature-controlled transformations,low temperature is conducive to minimizing SS surface coating at the time of mineral carbonation.

关键词： basalt-water-CO2 interaction carbon capture and storage CO2 mineralization leachate chemistry normalized mass loss secondary silicates

Growth of small diameter multi-walled carbon nanotubes by arc discharge process

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Chinese physics B 2014年第3期23卷 412-417页

作者： K.T.Chaudhary j.Ali p.p.Yupapin Institute of Advanced photonics Science (ApSI) Nanotechnology Research Alliance Universiti Teknologi Malaysia 81310Johor Bahru Malaysia Nanoscale Science and Research Alliance (N’SERA) Faculty of Science King Mongkut’s Institute of Technology Ladkrabang

Multi-walled carbon nanotubes （MWCNTs） are grown by arc discharge method in a controlled methane environment. The arc discharge is produced between two graphite electrodes at the ambient pressures of 100 tort, 300 torr, and 500 torr. Arc plasma parameters such as temperature and density are estimated to investigate the influences of the ambient pressure and the contributions of the ambient pressure to the growth and the structure of the nanotubes. The plasma temperature and density are observed to increase with the increase in the methane ambient pressure. The samples of MWCNT synthesized at different ambient pressures are analyzed using transmission electron microscopy, scanning electron microscopy, Raman spectroscopy, Fourier transform infrared spectroscopy, and X-ray diffraction. An increase in the growth of MWCNT and a decrease in the inner tube diameter are observed with the increase in the methane ambient pressure.

关键词： electric discharge arc plasma temperature and density carbon nanotubes