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Characterization of electrical properties of Algan/gan interface using coupled Schrodinger and Poisson equation

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Journal of Semiconductors 2012年第11期33卷 16-23页

作者： S.Das A.K.Panda g.n.Dash national Institute of Science and Technology Palur HillsBerhampurOdisha761008India

The electrical characterization of Algan/gan interface is *** dependence of two-dimensional electron gas（2-DEg） density at the interface on the Al mole fraction and thickness of AIgan layer as well as on the thickness of gan cap layer is *** information can be used to design and fabricate Algan/gan based MODFET（modulation doped field effect transistor） for optimum DC and RF characteristics.

关键词： MODFET 2-DEg polarization critical thickness self-heating

Enhanced heavy and extra heavy oil recovery:Current status and new trends

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Petroleum 2024年第3期10卷 399-410页

作者： Sayed gomaa Khalaf g.Salem A.n.El-hoshoudy Mining and Petroleum Engineering Department Faculty of EngineeringAl-Azhar UniversityEgypt Department of Reservoir Engineering South Valley Egyptian Petroleum Holding Company(GANOPE)CairoEgypt PVT Lab-Production Department Egyptian Petroleum Research Institute(EPRI)Cairo 11727Egypt PVT-Service Center Egyptian Petroleum Research Institute(EPRI)Cairo 11727Egypt

Due to the increased demand for energy resources these days,especially due to the Russian-Ukrainian war,the focus of the major countries is turning strongly towards improving oil production,especially heavy and extra heavy oil,which represents 40%of the world oil ***-based and thermal(EOR)procedures are promising techniques for recovering heavy oil reservoirs,but they suffer from a sequence of problems and complications that arise after long-term *** complications comprise steam breakthrough,steam overlap,and steam/rock *** research presents the currently applied techniques to maximize the productivity of heavy oil,such as steam injection,cyclic steam stimulation,in-situ combustion,and steam-assisted gravity *** technologies face numerous obstacles,as they are energy and water-intensive processes that are not environmentally *** research also presents future trends in energy-saving and environmentally friendly techniques that enhance heavy oil recovery through vapor extraction(VAPEX)steam-solvent hybrid techniques,electromagnetic energy,sonication,and *** findings of this review reported that all the presented techniques focus on how to reduce the oil viscosity and in-situ upgrade the crude oil *** turn,these enhance both the productivity rate and oil recovery and minimize the production *** article can be considered a comprehensive review of thermal recovery methods in heavy and extra-heavy oil,in addition to screening criteria used for each method.

关键词： Enhanced oil recovery Heavy crude oil Steam flood Hybrid techniques nanotechnology

Truncated States Obtained by Iteration

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Chinese Physics Letters 2008年第2期25卷 517-520页

作者： W. B. Cardoso n. g. de Almeida Instituto de Física Universidade Federal de Goiás 74.001-970 Goiania (GO) Brazil núcleo de Pesquisas em Física Universidade Católica de Goiá s 74.605-220 Goiania (GO) Brazil

We introduce the concept of truncated states obtained via iterative processes （TSI） and study its statistical features, making an analogy with dynamical systems theory （DST）. As a specific example, we have studied TSI for the doubling and the logistic functions, which are standard functions in studying chaos. TSI for both the doubling and logistic functions exhibit certain similar patterns when their statistical features are compared from the point of view of DST.

关键词： QUAnTUM CRYPTOgRAPHY DECOHEREnCE gEnERATIOn COLLAPSE REVIVAL OPTICS FIELD

Existence and nonexistence of nontrivial Weak Solution for a Class of general Capillarity Systems

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Acta Mathematicae Applicatae Sinica 2014年第4期30卷 1121-1130页

作者： g.A.AFROUZI n.T.CHUng Z.nAgHIZADEH Department of Mathematics Faculty of Mathematical SciencesUniversity of Mazandaran Department of Mathematics Quang Binh University312 Ly Thuong Kiet

The aim of this paper is to study the nonexistence and existence of nonnegative, nontrivial weak solution for a class of general capillarity systems. The proofs rely essentially on the minimum principle combined with ... 详细信息

关键词： weak solutions nonexistence multiplicity capillarity systems variational methods

Application of supersonic particle deposition to enhance the structural integrity of aircraft structures

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Science China(Physics,Mechanics & Astronomy) 2014年第1期57卷 12-18页

作者： Matthews n. Jones R. Sih g.C. Rosebank Engineering Australia 836 Mountain Highway Bayswater VIC 315 Australia Centre of Expertise in Structural Mechanics Department of Mechanical and Aeronautical Engineering Monash UniversityWellington Rd Clayton Vic 3800 Australia Centre of Sustainability Accountability and Eco-Affordability for Large and Small Structures Lehigh University BethlehemPennsylvania USA

Aircraft metal components and structures are susceptible to environmental degradation throughout their original design life and in many cases their extended *** paper summarizes the results of an experimental program to evaluate the ability of Supersonic Particle Deposition(SPD),also known as cold spray,to extend the limit of validity(LOV)of aircraft structural components and to restore the structural integrity of corroded *** this study the potential for the SPD to seal the mechanically fastened joints and for this seal to remain intact even in the presence of multi-site damage(MSD)has been *** sealing the joint the onset of corrosion damage in the joint can be significantly retarded,possibly even eliminated,thereby dramatically extending the LOV of mechanically fastened *** study also shows that SPD can dramatically increase the damage tolerance of badly corroded wing skins.

关键词： cold spray fuselage joints corrosion LOV

Improvement of Drill Performance in Metal Cutting Using MoST Solid Lubricant Coatings

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材料热处理学报 2004年第05B期25卷 870-874页

作者： n.R. Thomas D.g. Teer S. Hickman Teer Coatings Ltd. West Stone House West Stone Berry Hill Industrial Estate Droitwich WR9 9AS UKTeer Coatings Ltd. West Stone House West Stone Berry Hill Industrial Estate Droitwich WR9 9AS UKTeer Coatings Ltd. West Stone House West Stone Berry Hill Industrial Estate Droitwich WR9 9AS UK

Coated tools are widely used in today’s metal cutting industries and have significantly improved machining productivity through reducing operation costs and time. This paper presents the results of a systematic study of the performance of HSS drills coated with CrTiAIn and drills with a top solid lubricant coating of MoST?. The tests were performed on a Haas vertical machining centre under wet and dry cutting conditions to machine through holes in medium carbon steel workpieces. The feed force and torque were recorded throughout some of the tests using a force dynamometer, while the tool wear was monitored and measured. It was found that MoST? coatings even under accelerated conditions improve the tool life significantly based on their unique properties and very low friction.

关键词：金属切割 MoST 固态润滑剂钻头

Influence of Quantal and Statistical Fluctuations on Phase Transitions in Finite nuclei

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Communications in Theoretical Physics 2011年第10期56卷 718-726页

作者： g.Kanthimathi n.Boomadevi T.R.Rajasekaran R.M.D.Engineering College R.S.M.NagarKavaraipettai-601206Tamil NaduIndia Department of Physics Manonmaniam Sundaranar UniversityTirunelveli-627012Tamil NaduIndia

Investigations on thermal evolution of pairing-phase transition and shape-phase transition in light nuclei are made as a function of pair gap, deformation, temperature and angular momentum using a finite temperature statistical approach with main emphasis to fluctuations. The occurrence of a peak structure in the specific heat predicted as signals of the pairing-phase and shape-phase transitions are reviewed and it is found that they are not actually true phase transitions and it is only an artifact of the mean field models. Since quantal number and spin fluctuations and statistical fluctuations in pair gap, deformation degrees of freedom and energy when incorporated, it wash out the pairing-phase transition and smooth out the shape-phase transition. Phase transitions due to collapse of pair gap and deformation is discussed and a clear picture of pairing-phase transition in light nuclei is presented in which pairing transition is reconciled.

关键词： phase transitions specific heat fluctuations

Application of the generalized Differential Quadrature Method in Solving Burgers' Equations

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Communications in Theoretical Physics 2011年第12期56卷 1009-1015页

作者： R.Mokhtari A.Samadi Toodar n.g.Chegini Department of Mathematical Sciences Isfahan University of TechnologyIsfahan 84156-83111Iran Department of Mathematics Tafresh UniversityTafresh 39518-79611Iran

The aim of this paper is to obtain numerical solutions of the one-dimensional,two-dimensional and coupled Burgers' equations through the generalized differential quadrature method(gDQM).The polynomial-based differential quadrature(PDQ) method is employed and the obtained system of ordinary differential equations is solved via the total variation diminishing Runge-Kutta(TVD-RK) *** numerical solutions are satisfactorily coincident with the exact *** method can compete against the methods applied in the literature.

关键词： generalized differential quadrature method (gDQM) total variation diminishing Runge-Kutta(TVD-RK) method Burgers' equations

Plant micro-reserves in Valencia(E. Spain):A model to preserve threatened flora in China?

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Plant Diversity 2017年第6期39卷 383-389页

作者： Simón Fos Emilio Laguna Juan Jimenez Miguel Angel gómez-Serrano VAERSA-generalitat Valenciana Avda. Corts Valencianes Servicio de Vida Silvestre Generalitat Valenciana C./ Castan Tobenas Centro para la Experimentación e Investigación Forestal (CIEF) Generalitat Valenciana Avda. Comarques del País Valencia

The Valencian Community(eastern Spain) was the pioneer territory establishing plant micro-reserves(PMRs). Its model to protect small sites for endemic and endangered plants has been exported to several countries around the globe. This paper highlights 1) the role of PMRs to complement the protection provided by large protected areas, 2) how the establishment of PMRs fosters the increase of floristic knowledge, and 3)the fact that continuous monitoring of PMRs also yields new records of endangered species found within the same PMRs. The flexibility of the PMR approach-it can be adapted to other national and regional legislationsallows its transfer to other rich-biodiversity regions and countries such as China.

关键词： Plant micro-reserves in situ conservation Threatened species Endemic plants Protected areas