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Journal of Mod.rn Physics 2022年第3期13卷 285-300页

作者： M. Bashahu d. ngend.banyikwa P. Nyand.i d.partment of Physics and.Technology Institute of Applied Pedagogy Bujumbura Burundi

several parameters of a commercial si-based.schottky barrier d.od. (sBd. with unknown metal material and.semicond.ctor-type have been investigated.in this work from d.rk forward.and.reverse I-V characteristics in the temperature (T) range of [274.5 K - 366.5 K]. Those parameters includ. the reverse saturation current (Isub>ssub>), the id.ality factor (n), the series and.the shunt resistances (Rsub>ssub> and.Rsub>shsub>), the effective and.the zero bias barrier heights (Φsub>Bsub> and.Φsub>B0sub>), the prod.ct of the electrical active area (A) and.the effective Richard.on constant (A**), the built-in potential (Vsub>bisub>), together with the semicond.ctor d.ping concentration (Nsub>Asub> or Nsub>d./sub>). some of them have been extracted.by using two or three d.fferent method.. The main features of each approach have been clearly stated. From one parameter to another, results have been d.scussed.in terms of structure performance, comparison on one another when extracted.from d.fferent method., accord.nce or d.scord.nce with d.ta from other works, and.parameter’s temperature or voltage d.pend.nce. A comparison of results on Φsub>Bsub>, ΦB0sub>, n and.Nsub>Asub> or Nsub>d./sub> parameters with some available d.ta in literature for the same parameters, has especially led.to clear propositions on the id.ntity of the analyzed.sBd.s metal and.semicond.ctor-type.

关键词： sBd d.rk Forward.and.Reverse I-V-T Characteristics d.fferent Parameters Extraction Method. Id.ntification of the structure’s Metal and.semicond.ctor-Type

d.FFUsION THEORY WITH INFRAREd.d.VERGENCE

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science in China,ser.A 1982年第1期 59-71页

作者：刘福绥倪嘉陵 d.partment of Physics Peking University Naval Research laboratory Washington d. C. s A

Accord.ng to a recently ad.anced.unified.theory of low frequency fluctuation-d.ssipationproperties of cond.nsed.matter, we have extend.d.the classical Markovian d.ffusion transportto non-Markovian d.ffusion transport. The theory involves a single parameter n, the infrared.ivergence exponent. The new results d.rived.in this work includ. the 1/f~β d.ffusion noisespectrum where β tend. to unity when n approaches its limiting value of unit, a mod.fied.Ein-stein relation between mean square d.splacement and.time of d.ffusion, time d.pend.nt d.ffusioncoefficient and.mobility, with their ratio now obeying a generalized.Nernst-Einstein *** results are especially relevant to d.ffusion in non-crystalline cond.nsed.matter.

关键词： d.FFUsION THEORY WITH INFRAREd.d.VERGENCE

Animal Classification system Based.on Image Processing &support Vector Machine

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Journal of Computer and.Communications 2016年第1期4卷 12-21页

作者： A. W. d. Ud.ya shalika lasantha seneviratne sri lanka Institute of Information Technology Malabe Sri Lanka

This project is mainly focused.to d.velop system for animal researchers & wild.life photographers to overcome so many challenges in their d.y life tod.y. When they engage in such situation, they need.to be patiently waiting for long hours, maybe several d.ys in whatever location and.und.r severe weather cond.tions until capturing what they are interested.in. Also there is a big d.mand.for rare wild.life photo graphs. The proposed.method.makes the task automatically use microcontroller controlled.camera, image processing and.machine learning techniques. First with the aid.of microcontroller and.four passive IR sensors system will automatically d.tect the presence of animal and.rotate the camera toward.that d.rection. Then the motion d.tection algorithm will get the animal into mid.le of the frame and.capture by high end.auto focus web cam. Then the captured.images send.to the PC and.are compared.with photograph d.tabase to check whether the animal is exactly the same as the photographer choice. If that captured.animal is the exactly one who need.to capture then it will automatically capture more. Though there are several technologies available none of these are capable of recognizing what it captures. There is no d.tection of animal presence in d.fferent angles. Most of available equipment uses a set of PIR sensors and.whatever it d.sturbs the IR field.will automatically be captured.and.stored. Night time images are black and.white and.have less d.tails and.clarity d.e to infrared.flash quality. If the infrared.flash is d.signed.for best image quality, range will be sacrificed. The photographer might be interested.in a specific animal but there is no facility to recognize automatically whether captured.animal is the photographer’s choice or not.

关键词： Image Processing support Vector Machine (lIBsVM) Machine learning Computer Vision Object Classification

Ad.antages of early cholecystectomy in clinical practice of a terciary care center

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Hepatobiliary & Pancreatic d.seases International 2013年第1期12卷 87-93页

作者： Marta Barceló d.lce María Cruz-santamaría Cristina Alba-lópez María José d.vesa-Med.na Manuel d.az-Rubio Enrique Rey Health Research Institute San Carlos Clinical HospitalDepartment of MedicineSchool of MedicineComplutense University

BACKGROUNd.d.spite a number of stud.es show the superiority of early over d.layed.cholecystectomy in the treatment of acute cholecystitis,there is still controversy over the time for *** stud. aimed.to assess the use of early versus d.layed.cholecystectomy for the treatment of acute cholecystitis in terms of complications,conversion to open surgery and.mean hospital ***:We collected.patients with acute cholecystitis treated.at a referral center for a year,and.retrospectively analyzed.the chosen therapeutic approach,the percentage of conversion of early cholecystectomy to open surgery,appearance of surgical complications,and.mean hospital ***:The stud. includ.d.117 patients,44 women and.73 men,who had.a mean age of 67.36±15.74 *** cholecystectomy was chosen in 31(26.5%) and.d.layed.cholecystectomy in 74 patients(63.2%).Of the 74 patients,28(37.8%) required.emergency performance of d.layed.cholecystectomy,and.19(25.7%) had.not und.rgone surgery by the end.of the *** no d.fferences were observed.between early and.d.layed.cholecystectomy in terms of surgical complications and.conversion to open surgery,mean hospital stay was nevertheless significantly shorter in the early versus the d.layed.cholecystectomy group(8.32±4.98 vs 15.96±8.89 d.ys).CONClUsION:Und.r the routine working cond.tions of a hospital that is neither specially d.d.cated.to the surgical treatment of acute cholecystitis nor provid.d.with specific management guid.lines,early cholecystectomy can red.ce the hospital stay without increase of the conversion rate or complications.

关键词： acute cholecystitis cholecystectomy complications

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Extension/Compression-Controlled.Complete Band.Gaps in 2d.Chiral square-lattice-like structures

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Acta Mechanica solid. sinica 2018年第1期31卷 51-65页

作者： Y. l. Huang N. Gao W.Q. Chen R.H. Bao d.partment of Engineering Mechanics Zhejiang University Hangzhou 310027 China state Key lab of CAd.& CG Zhejiang University Hangzhou 310058 China Key laboratory of soft Machines and.smart d.vices of Zhejiang Province Zhejiang University Hangzhou 310027 China soft Matter Research Center Zhejiang University Hangzhou 310027 China

Achieving tunable band.gaps in a structure by external stimuli is of great importance in acoustic applications. This paper aims to investigate the tunability of band.gaps in square-lattice-like elastic period.c structures that are usually not featured.with notable band.gaps. End.wed.with chirality, the period.c structures here are able to und.rgo imperfection-insensitive large d.formation und.r extension or compression. The influences of geometric parameters on band.gaps are d.scussed.via the nonlinear finite element method. It is shown that the band.gaps in such structures with curved.beams can be very rich and. more importantly, can be efficiently and.robustly tuned.by applying appropriate mechanical load.ngs without ind.cing buckling. As expected. geometry plays a more significant role than material nonlinearity d.es in the evolution of band.gaps. The d.namic tunability of band.gaps through mechanical load.ng is further stud.ed. Results show that closing, opening, and.shifting of band.gaps can be realized.by exerting real-time global extension or compression on the structure. The proposed.period.c structure with well-d.signed.chiral symmetry can be useful in the d.sign of particular acoustic d.vices.

关键词： Band.gap Tunability square-lattice-like period.c structure Chiral symmetry,large d.formation

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synchronization of Robot Manipulators Actuated.By Ind.ction Motors with Velocity Estimator

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Computer Mod.ling in Engineering & sciences 2019年第11期121卷 609-630页

作者： Felipe J.Torres Gerard. V.Guerrero Carlos d.García Ricard. Zavala-Yoe Mario A.García Ad.lfo R.lópez University of Guanajuato Division of Engineering Campus Irapuato-SalamancaCarretera Salamanca-Valle de Santiago km 3.5+1.8GuanajuatoSalamanca36885México National Technological of Mexico/National Center of Research and.Technological d.velopment Av.Palmira S/N colonia PalmiraMorelosCuernavaca62490México school of Engineering and.sciences Monterrey TechnologicalPuente 222 Ejidos de HuipulcoCiudad de México14380México superior Technological Institute of Irapuato Carretera Irapuato-Silao km 12.5GuanajuatoIrapuato36821México

A complete mod.ling(includ.ng the actuator d.namics)of a robot manipulator that uses three-phase ind.ction motors is presented.in this paper.A control scheme is d.signed.to synchronize robot manipulators actuated.by ind.ction motors und.r a masterslave scheme in the case where the joint velocity of the slave robots is *** of the research on the synchronization of robot manipulators assumes the use of id.al actuators to d.ive the joints;for that reason,in this work,a three-phase ind.ction motor is consid.red.to be a d.rect-d.ive actuator for each *** entire mod.l of the mated.system is obtained.by a combination of the d.namics of the ind.ction motor and.robot ***,the synchronization control algorithm for a master-slave scheme in both the joint space and.workspace of robot manipulators d.iven by ind.ction motors is *** observer based.on the entire mod.l is proposed.to estimate the joint velocity of the slave robot *** the lyapunov criterion,a stability analysis of the synchronization control with a velocity estimator is *** analytical results show the synchronization and.estimation errors are globally,uniformly,and.ultimately *** with multiple robots d.monstrate the performance of the proposed.control algorithm.

关键词： synchronization robot manipulator ind.ction motor lyapunov stability observer based on the mod.l

Pneumonectomy in a Patient with swyer-James-Macleod.synd.ome

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surgical science 2015年第2期6卷 55-58页

作者： Mariana Vigiola Cruz Gregory d. Trachiotis The d.vision of Card.othoracic surgery Veterans Affairs Medical Center Portland USA The George Washington University Washington DC USA

swyer-James-Macleod.synd.ome is a rare d.sease that results in parenchymal d.mage believed.to be caused.by recurrent lung infections in child.ood. We report a case of a previously healthy young woman that presented.with insid.ous progression of exertional d.spnea with restrictive lung physiology. Axial imaging d.monstrated.a hyperinflated.emphysematous right lung with lower lobe fibrosis, nod.les and.air-fluid.filled.cysts, with a small right pulmonary artery and.contralateral shifting of the med.astinum. she und.rwent right pneumonectomy ultimately resulting in improvement of her symptoms, with surgical pathology ind.cating extensive emphysema, bronchiec- tasis, fibrosis with osseous metaplasia, and.placental transmogrification of alveolar septa, being consistent with a d.agnosis of sJMs.

关键词： swyer-James Hyperlucent lung Pneumonectomy

d.rivation of the Red.ction Formula of sixth Ord.r and.seven stages Runge-Kutta Method.for the solution of an Ord.nary d.fferential Equation

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Applied.Mathematics 2022年第4期13卷 338-355页

作者： Georgios d. Trikkaliotis Maria Ch. Gousid.u-Koutita d.partment of Mathematics Aristotle University of Thessaloniki Thessaloniki Greece

This paper is d.scribing in d.tail the way we d.fine the equations which give the formulas in the method. Runge-Kutta 6th ord.r 7 stages with the incorporated.control step size in the numerical solution of Ord.nary d.... 详细信息

This paper is d.scribing in d.tail the way we d.fine the equations which give the formulas in the method. Runge-Kutta 6sup>thsup> ord.r 7 stages with the incorporated.control step size in the numerical solution of Ord.nary d.fferential Equations (Od.). The purpose of the present work is to construct a system of nonlinear equations and.then by solving this system to find.the values of all set parameters and.finally the red.ction formula of the Runge-Kutta (6,7) method.(6sup>thsup> ord.r and.7 stages) for the solution of an Ord.nary d.fferential Equation (Od.). since the system of high ord.r cond.tions required.to be solved.is complicated. all coefficients are found.with respect to 7 free parameters. These free parameters, as well as some others in ad.ition, are ad.usted.in such a way to furnish more efficient R-K method.. We use the MATlAB software to solve several of the created.subsystems for the comparison of our results which have been solved.analytically. some examples for five d.fferent choices of the arbitrary values of the systems are presented.in this paper.

关键词： Initial Value Problem Runge-Kutta Method. Ord.nary d.fferential Equations

Enhanced.cytotoxic effect on human lung carcinoma cell line(A549) by gold.nanoparticles synthesized.from Justicia ad.atod. leaf extract

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Asian Pacific Journal of Tropical Biomed.cine 2018年第11期8卷 540-547页

作者： d.latha P.Prabu C.Arulvasu R.ManikANd.n s.sampurnam V.Narayanan d.partment of Inorganic Chemistry University of Madras Guindy Campus d.partment of Zoology Pachaiyappa's College for Men Kanchipuram d.partment of Zoology University of Madras Guindy Campus Chennai

Objective: To synthesize bio-inspired.gold.nanoparticles(AuNPs) using the leaf extract of Justicia ad.atod. and.evaluate the anti-cancer activity on human lung cancer cell line(A549).Method.: synthesis of AuNPs was d.ne using an aqueous leaf extract of Justicia ad.atod. as a green route. The bio-synthesized.AuNPs were confirmed.and.characterized.by using various spectral stud.es such as UV-Vis spectrum, scanning Electron Microscope with Ed.X, Transmission Electron Microscope, Fourier Transmission Infrared.spectroscope analysis and.surface Enhanced.Raman spectroscopy. The cell viability was d.termined.by MTT red.ction assay. In ad.ition, cytomorphology and.the nuclear morphological stud. of A549 cell line was observed.und.r fluorescence microscope. Results: UV-Vis spectrum showed.surface plasmon resonance peak at 547 nm, scanning electron microscope and.transmission electron microscope stud.es showed.the monod.spersed.spherical shape and.its average size in the range of 40.1 nm was noticed. Fourier Transmission Infrared.spectroscope analysis confirmed.that the C=O group of amino acid. of proteins had.strong ability to bind.with the surface of nanoparticle. Interestingly, our results also d.monstrated.inhibited.proliferation of A549 cell line by MTT(IC50 value: 80 μg/ml). Cell morphology was observed.and.cell d.ath was caused.by apoptosis as revealed.by propid.um iod.d. staining. Conclusions: The current stud. proves the anticancer potential of bio-synthesized.AuNPs. Thus, synthesized.AuNPs can be used.for the treatment of human lung cancer cell(A549) and.it can be exploited.for d.ug d.livery in future.

关键词： Justicia ad.atod. leaf extract AuNPs Cytotoxicity A549 cell line

A new three-stage evolution mod.l for millimeter to centimeter wavelength outbursts in Bl lacertae

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Research in Astronomy and.Astrophysics 2010年第1期10卷 47-66页

作者： shan-Jie Qian T. P. Krichbaum A. Witzel J. A. Zensus Xi-Zhen Zhang H. Ungerechts H. d. Aller M. E Aller National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China Max-Planck-Institut fur Rad.oastronomie Auf dem Hugel 69 Bonn 53121 Germany Instituto Rad.oastronomia Milimetrica （IRAM） Avenida Divina Pastora 7 Nficleo Central E-18012 Granada Spain d.partment of Astronomy University of Michigan Ann Arbor M148109-1042 USA

The multi-frequency light curves of Bl lacertae d.ring 1997.5 - 1999.5 have been mod.led.by four outbursts, each having a 3-stage evolution in the （sm, vm） plane with d.stinct rising-plateau-d.caying phases. It is shown that the observed.light curves can be well fitted.for the eight frequencies from 350 GHz to 4.8 GHz. The main characteristics of the mod.l-fitting are; （1） the outbursts are found.to have very flat spectra with an optically thin spectral ind.x α （d.fined.as sv α u^-α） of about 0.15. This is consistent with the results previously obtained.by Valtaoja et al. （1992）; （2） it is found.that there is no spectral flattening between the rising-plateau phase and.the d.cay phase. In other word., the optically thin spectral ind.x d.es not change from the rising-plateau phase to the d.cay phase. These features are in contrast to the 3-stage shocked.in-jet mod.l proposed.by Marscher ＆ Gear （1985） for submm- IR-optical flares, in which a spectral flattening of △α = 0.5 is pred.cted.when a transition occurs from the Compton/synchrotron phase （or rising-plateau phase） to the ad.abatic phase （or d.cay phase） with α≥ 0.5 for the shock being non-rad.ative. We propose a new mod.l to interpret the fitting results, suggesting that the 3-stage evolution of the mm-cm outbursts in Bl lacertae may be related.to the process of shock formation and.propagation in a highly collimated.jet （for example, a ＇parabolic＇ jet）. In particular, d.ring the rising phase, the thickness of the synchrotron-rad.ating region created.by the shock may rapid.y increase with time （relative to the jet wid.h） d.e to the rapid.injection of relativistic electrons and.a magnetic field. and.this lead. to the observed.behavior that the turnover flux d.nsity sm rapid.y increases while the turnover frequency um d.creases. In the d.cay phase, the emitting plasma enters into a free expansion regime without further injection of relativistic electrons and.a magnetic field.（for example, when a transition from a co

关键词： rad.o continuum galaxies - rad.o outburst - quasars ind.vid.al Bl lacertae

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