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Journal of Semiconduct.r. 2014年第10期35卷 26-29页

作者： Devashish Pandey t.r.Lenka Department of Electronics and Communication Engineering National Institute of Technology Silchar

A model predicting the behavior of various paramet.r., such as 2DEG sheet charge density and t.r.sh- old voltage, with the variation of barrier thickness and oxide thickness considering int.r.ace density of states is presented. the mathematical dependence of these paramet.r. is derived in conjunction with the int.r.ace density of states. the dependence of sheet charge density with the barrier thickness and with the oxide thickness is plotted and an insight into the barrier scaling properties of AIInN based MOSHEMts is presented. the t.r.shold voltage is also plotted with respect to barrier thickness and oxide thickness, which reveals the possibility of the enhance- ment mode operation of the device at low values of the int.r.ace DOS. the results are in good agreement with the fabricated device available in the lit.r.t.r..

关键词： DOS AIlnN MOSHEMt 2DEG barrier scaling

Conservation laws,Lie symmetries,self adjointness,and soliton solutions for the Selkov–Schnakenberg system

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Communications in theoretical Physics 2024年第2期76卷 29-44页

作者： Kashif Ali Aly r Seadawy Syed t.r.rizvi Noor Aziz Department of Mathematics COMSATS University IslamabadLahore CampusPakistan Mathematics Department Faculty of ScienceTaibah UniversityAl-Madinah Al-Munawarah41411Saudi Arabia

In this article,we explore the famous Selkov–Schnakenberg(SS)system of coupled nonlinear partial differential equations(PDEs)for Lie symmetry analysis,self-adjointness,and conservation ***,miscellaneous soliton solutions like dark,bright,periodic,rational,Jacobian elliptic function,Weierstrass elliptic function,and hyperbolic solutions of the SS system will be achieved by a well-known technique called sub-ordinary differential *** these results are displayed graphically by 3D,2D,and contour plots.

关键词： Selkov-Schnakenberg system Lie symmetry analysis conservation laws adjointness integrability

A Convolutional Neural Network Classifier VGG-19 Architect.r. for Lesion Detection and Grading in Diabetic retinopathy Based on Deep Learning

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Comput.r., Mat.r.als & Continua 2021年第1期66卷 827-842页

作者： V.Sudha t.r.Ganeshbabu Department of Electronics and Communication Engineering Pavai College of TechnologyNamakkal637018India Department of Electronics and Communication Engineering Muthayammal Engineering CollegeRasipuram637408India

Diabetic retinopathy(Dr)is a type of disease in eyes as a result of a diabetic condition that ends up damaging the retina,leading to blindness or loss of *** and physiological retinal variations involving slowdown of blood flow in the retina,elevation of leukocyte cohesion,basement membrane dystrophy,and decline of pericyte cells,*** Dr in its initial stage has no symptoms,early detection and automated diagnosis can prevent further visual *** this research,using a Deep Neural Network(DNN),segmentation methods are proposed to detect the retinal defects such as exudates,hemorrhages,microaneurysms from digital fundus images and then the conditions are classified accurately to identify the grades as mild,moderate,severe,no PDr,PDr in ***,saliency detection is applied on color images to detect maximum salient foreground objects from the ***,struct.r. tensor is applied powerfully to enhance the local patt.r.s of edge elements and intensity changes that occur on edges of the ***,active contours approximation is performed using gradient descent to segment the lesions from the ***,the output images from the proposed segmentation process are subjected to evaluate the ratio between the total contour area and the total true contour arc length to label the classes as mild,moderate,severe,No PDr and *** on the computed ratio obtained from segmented images,the severity levels were ***,statistical paramet.r. like the mean and the standard deviation of pixel intensities,mean of hue,sat.r.tion and deviation clust.r.ng,are estimated t.r.ugh K-means,which are computed as feat.r.s from the output images of the proposed segmentation *** these derived feat.r. sets as input to the classifier,the classification of Dr was ***,a VGG-19 deep neural network was trained and tested using the derived feat.r. sets from the KAGGLE fundus image dataset containing 35,126 images in

关键词： Diabetic retinopathy saliency map struct.r. tensor gradient descent method exudates haemorrhages microaneurysms VGG-19

SOME EXACt SOLUtIONS OF 3-DIMENSIONAL ZErO-PrESSUrE GAS DYNAMICS SYStEM

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Acta Mathematica Scientia 2011年第6期31卷 2107-2121页

作者： K.t. Joseph Manas r. Sahoo School of Mathematics Tata Institute of Fundamental Research

the 3-dimensional zero-pressure gas dynamics system appears in the modeling for the large scale struct.r. formation in the universe. the aim of this paper is to construct spherically symmetric solutions to the system. the radial component of the velocity and density satisfy a simpler one dimensional problem. First we construct explicit solutions of this one dimensional case with initial and boundary conditions. then we get special radial solutions with different behaviours at the origin.

关键词： zero-pressure gas dynamics spherically symmetric solutions

Deviations of the lepton mapping matrix from the Harrison-Perkins-Scott form

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Chinese Physics C 2010年第10期34卷 1547-1555页

作者： r.Friedberg t.D.Lee Physics Department Columbia UniversityNew York China Cent.r.of Advanced Science and technology(CCASt/World Lab.)

We propose a simple set of hypotheses governing the deviations of the leptonic mapping matrix from the Harrison-Perkins-Scott （HPS） form. these deviations are supposed to arise ent.r.ly from a pert.r.ation of the mass matrix in the charged lepton sect.r. the pert.r.ing matrix is assumed to be purely imaginary （thus maximally t-violating） and to have a strength in energy scale no great.r.（but perhaps smaller） than the muon mass. As we shall show, it then follows that the absolute value of the mapping matrix elements pertaining to the tau lepton deviate by no more than O（（mμ/mτ）^2） ≈ 3.5 ×10^-3 from their HPS values. Assuming that （mμ/mτ）^2 can be neglected, we derive two simple constraints on the four paramet.r. θ12,θ23, θ31, and δ of the mapping matrix. these constraints are independent of the details of the imaginary t-violating pert.r.ation of the charged lepton mass matrix. We also show that the e and μ parts of the mapping matrix have a definite form governed by two paramet.r. α and β; any deviation of order mμ/mτ can be accommodated by adjusting these two paramet.r..

关键词： lepton mapping matrix CP and t violation Jarlskog invariant timeon

rEPELLErS FOr MULtIFUNCtIONS OF SEMI-BOrNOLOGICAL SPACES

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Acta Mathematica Scientia 2008年第3期28卷 545-550页

作者： M.r. Molaei t. Waezizadeh Department of Mathematics University of Kerman

In this article the notion of repeller for multifunctions from the viewpoints of semi-bornologicul spaces is considered. the concept of lower semi-continuous multifunctions is extended by the use of semi-bornological spaces. Semi-bornological vect.r.spaces are studied. the notion of conjugacy for semi-bornological multifunctions is considered. the persistence of repeller under conjugate relation is proved.

关键词： Semi-bornology repeller multifunction conjugacy

Flotation tree analysis for recovery of sillimanite from red sediments

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Int.r.ational Journal of Mining Science and technology 2015年第5期25卷 843-848页

作者： Laxmi t. rao r.Bhima Advanced Mat.r.als technology Department Institute of Minerals & Materials Technology Aryan Institute of Engineering and technology Bijupatnaik University of Technology

In this paper an attempt is made to recover sillimanite by flotation tree analysis process and conventional flotation process from non magnetic fraction of red *** experimental results of both the processes are *** data reveal that the deslimed sample contains 33.2%(by weight) total heavy minerals and out of which the sillimanite mineral content is 3.6%(by weight).It is observed that flotation tree analysis needs 10 cells to get five output products and where as conventional flotation process needs 15 cells to recover similar grade of five output ***,flotation tree analysis is not only economic process but also efficient process(to say efficient process,the tree analysis product should be higher grade).

关键词： tree analysis Flotation red sediment Sillimanite

recovery of total Heavy Minerals from Badlands of Basanputti Village,Odisha

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Journal of Earth Science 2012年第6期23卷 892-899页

作者： t Laxmi rajalaxmi Mohapatra r Bhima rao Institute of Minerals and Mat.r.als technology Council of Scientific and Industrial ResearchBhubaneswar 751013India Aryan Institute of Engineering and technology Bijupatnaik UniversityBhubaneswarIndia

the badland topography of Basanputti Village, Ganjam District, Odisha, possesses red sediments. the typical red sediment deposit, on average, consists of 71.8% total heavy minerals （tHM）, out of which 62.1% are ilmenite. the other heavy minerals sillimanite, zircon, garnet, monazite, and pyriboles are in the order of abundance identified. In this present study, Mozley mineral separat.r.has been used to recover tHM from red sediment. Mineral separat.r.results indicate that a product ob- tained contains 72.2% by weight with 94.4% tHM and 95% recovery. the ilmenite concentrate recov- ered using dry low-intensity magnetic separat.r.from the tHM concentrate can be used in pigment in- dustries aft.r.suitable pyrometallurgical/chemical processing methods.

关键词： red sediment total heavy mineral (tHM) Mozley mineral separator Perm roll mag-netic separator ilmenite zircon.

Strategies for h-Adaptive refinement for a Finite Element treatment of Harmonic Oscillat.r.Schrodinger Eigenproblem

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Communications in theoretical Physics 2010年第6期53卷 1017-1023页

作者： t.D.Young r.Armiento Instytut Podstawowych Prolemow techniki Polskiej Academia Nauk ul. Pawinskiego 5b theoretische Physik Universitat Bayreuth

A Schrodinger eigenvalue problem is solved for the 219 quantum simple harmonic oscillat.r.using a finite element discretization of real space within which elements are adaptively spatially refined. We compare two competing methods of adaptively discretizing the real-space grid on which computations are performed without modifying the standard polynomial basis-set traditionally used in finite element int.r.olations; namely, （i） an application of the Kelly error estimat.r. and （ii） a refinement based on the local potential level. When the performance of these methods are compared to standard uniform global refinement, we find that they significantly improve the total time spent in the eigensolver.

关键词： adaptive finite element analysis Harmonic oscillat.r.problems Schrodinger equation

Struct.r.l and mechanical properties of Al–C–N films deposited at.r.om temperat.r. by plasma focus device

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Chinese Physics B 2016年第7期25卷 299-304页

作者： Z A Umar r Ahmad r S rawat M A Baig J Siddiqui t Hussain National Centre for Physics Quaid-i-Azam University Campus Department of Physics GC University NSSE National Institute of Education Nanyang Technological University Centre for Advanced Studies in Physics GC University

the Al–C–N films are deposited on Si substrates by using a dense plasma focus（DPF） device with aluminum fitted central electrode（anode） and by operating the device with CH_4/N_2 gas admixt.r. ratio of 1：1. XrD results verify the crystalline Al N（111） and Al_3CON（110） phase formation of the films deposited using multiple shots. the elemental compositions as well as chemical states of the deposited Al–C–N films are studied using XPS analysis, which affirm Al–N, C–C, and C–N bonding. the FESEM analysis reveals that the deposited films are composed of nanoparticles and nanoparticle agglomerates. the size of the agglomerates increases at a higher number of focus deposition shots for multiple shot depositions. Nanoindentation results reveal the variation in mechanical properties（nanohardness and elastic modulus）of Al–C–N films deposited with multiple shots. the highest values of nanohardness and elastic modulus are found to be about 11 and 185 GPa, respectively, for the film deposited with 30 focus deposition shots. the mechanical properties of the films deposited using multiple shots are related to the Al content and C–N bonding.

关键词： dense plasma focus XPS field emission scanning electron microscope elastic modulus