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LET'S MAKE ENGLISH MORE EXCITING

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广州大学学报（社会科学版） 1995年第2X期 87-93页

作者： Oliue b.Asbury

"Teacher, what are we going to do next class?" This is an exciting question which I often hear from my students. As an English conversation teacher, I can make the learning of English either a dull and boring duty, or an exciting adventure. It is very important that I make my students hate missing my class, and keep them guessing just what will happen the next time! Let us consider some important ways that any teacher can help his other students want to do

关键词： LET’S MAKE ENGLISH MORE EXCITING

A New Precision Peak Detector/Full-Wave Rectifier

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Journal of Signal and Information Processing 2013年第1期4卷 72-81页

作者： Predrag b.Petrovic Department for Electronics Faculty of Technical SciencesUniversity of KragujevacKragujevacSerbia

A new precision peak detector/full-wave rectifier of input sinusoidal signals, based on usage of dual-output current conveyors, is presented in this paper. The circuit gives a DC output voltage that is the peak input voltage over a wide frequency range, with a very low ripple voltage and low harmonic distortion. The proposed circuits use an all-pass filter as a 90° phase shifter of the processed input signal. To verify the theoretical analysis, the circuit SPICE simulations results have also been included, showing good agreement with the theory. Inherently, the circuit is well suited for IC implementation.

关键词： Dual-Output Current Conveyor (CC) All-Pass Filter Harmonic Distortion Precision Peak Detector Ripple Voltage

Adsorption isotherm mechanism of amino organic compounds as mild steel corrosion inhibitors by electrochemical measurement method

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Journal of Central South University 2010年第1期17卷 34-39页

作者： A.Y.MUSA A.A.H.KADHUM A.b.MOHAMAD M.S.TAKRIFF A.R.DAUD S.K.KAMARUDIN School of Chemical and Process Engineering Universiti Kebangsaan Malaysia School of Applied Physics Universiti Kebangs aan Malaysia

The inhibition ability of 4-amino-5-phenyl-4H-1, 2, 4-trizole-3-thiol （APTT）, ethylenediaminetetra-acetic acid （EDTA） and thiourea （TU） for mild steel corrosion in 1.0 moFL HC1 solution at 30 ℃ was investigated. Tafel polarization and electrochemical impedance spectroscopy （EIS） were used to investigate the influence of these organic compounds as corrosion inhibitors of mild steel in 1.0 mol/L HC1 solution at 30 ℃. The inhibition mechanism was discussed in terms of Langrnuir isotherm model. Results obtained from Tafel polarization and impedance measurements are in a good agreement. The inhibition efficiency increases with the increase of the inhibitor concentration. The adsorption of the inhibitors on the mild steel surface follows Langmuir adsorption isotherm and the free energy of adsorption AGads indicates that the adsorption of APTT, EDTA, and TU molecules is a spontaneous process and a typical chemisorption.

关键词： corrosion inhibitor Langmuir adsorption isotherm mild steel

Coefficient Determination in Parabolic Equations Solved as a Moment Problem Two-Dimensional in a Rectangular Domain

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Applied Mathematics 2018年第3期9卷 223-239页

作者： Maria b. Pintarelli Grupo de Aplicaciones Matematicas y Estadisticas de la Facultad de Ingenieria (GAMEFI) Universidad Nacional de La Plata Buenos Aires Argentina Departamento de Matematica Facultad de Ciencias Exactas Universidad Nacional de La Plata Buenos Aires Argentina

The problem is to considerer a parabolic equation depending on a coefficient a (t), and find the solution of the equation and the coefficient. The objective is to solve the problem as an application of the inverse moment problem. An approximate solution and limits will be found for the error of the estimated solution using the techniques of inverse problem moments. In addition, the method is illustrated with several examples.

关键词： Generalized Moment Problem Integral Equations Inverse Problem Parabolic PDEs Truncated Expansion Method

Miniaturized disk bend test-a new techniquefor monitoring the changes of mechanicalproperties of structural materials operatingin extreme conditions

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广东有色金属学报 2005年第2期15卷 643-647页

作者： Tsepelev A.b. A.A.baikov Institute of metallurgy and materials science of RAS Moscow119991 Russia

Method of Miniaturized Disk bend Test (MDbT) originally designed for the tests of irradiated materials is a convenient technique for monitoring the degradation of mechanical properties of structural materials operating in extreme conditions. A small size of specimens (disks with 3 mm in diameter and 0.1-0.3 mm in thickness) as well as possibility to use the standard equipments for tension and/or pressure tests allow minimizing the financial charge for application of this method in practice and enable to keep up in the real time with (watch on) the changes of materials mechanical properties induced by the effect of unfavorable environment. Wide application of MDbT or other methods for miniaturized specimen tests does possible to inspect on the fly the changes of strength and ductility of the materials, and, of the expense of it, to prevent an alert conditions caused by the materials degradation, for instance, catastrophic *** the paper, methodical aspects of MDbT technique application for estimation of structural materials mechanical properties have been considered. by the example of own results and literature data, the possibilities of MDbT method are demonstrated as well as the correlation of obtained from this technique parameters with the standard mechanical properties such as strength, yield stress and ductility of metals.

关键词：结构材料机械性能柔软性强度温度

Removal of Nitrogen Oxides in Diesel Engine Exhaust by Plasma Assisted Molecular Sieves

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Plasma Science and Technology 2002年第4期4卷 1399-1406页

作者： b S Rajanikanth, V RaviDept. of High Voltage Engineering, Indian Institute of Science, bangalore 560012,INDIA Dept. of High Voltage Engineering Indian Institute of Science Bangalore 560012 INDIA

This paper reports the studies conducted on removal of oxides ofnitrogen (NOx) from diesel engine exhaust using electrical dischargeplasma combined with adsorbing materials such as molecular *** study is being reported for the first time. The exhaust is takenfrom a diesel engine of 6 kW under no load conditions. Thecharacteristic behavior of a pulse energized dielectric barrierdischarge reactor in the diesel exhaust treatment is reported. TheNOx removal was not significant (36/100) when the reactor without anypacking was used.

关键词： diesel engine exhaust nitrogen oxides removal electrical discharge plasma

Cambrian Correlation between China and North America

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地质学报 1947年 141-161+421页

作者： b.F.HOWELL Princeton University

The promulgation by Professor Grabau of his Pulsation Theory has stimulated the interest of Paleozoic stratigraphers throughout the world in the intercontinental correlation of their formation and faunas. The degree t... 详细信息

关键词： Cambrian formations fauna Correlation Paleozoic earliest professor genera Montana northeastern

Geology and health：closing the gap

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Episodes 2004年第2期27卷 147-148页

作者： A.b.Kampunzu DepartmentofGeologyUniversityofbotswanaGaboronebOTSWANA

It was discovered several decades ago that the natural geo-environment could substantially impact on the health of animals and humans. However, despite the growth of evidence supporting this discovery, there has not been a close interaction between geoscientists and health scientists in assessing the need to study the various facets of the relationships between human and animal health and air, water, soils and rocks. This book is timely in closing that gap as stated in its title.

关键词：地质学环境健康地球科学

THEORY OF INTERPOLATION ON INFINITE INTERVAL—Ⅰ(UNIFORM CONVERGENCE OF STAbLE INTERPOLATION PROCESSES)

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Acta Mathematica Scientia 1986年第4期6卷 373-378页

作者： K.b.Srivastava Department of Mathematics Indian Institute of Technology Kanpur-208016 India

§1. Preliminaries and Results Let us begin by defining a triangular matrix L whose n-th row consists of n distinct points xvn, v=1, n; n=1, 2, … such that 01n2n<…nn<∞. （1.1） Denote by H_n.（f, x, L）≡H_n（f, L... 详细信息

§1. Preliminaries and Results Let us begin by defining a triangular matrix L whose n-th row consists of n distinct points xvn, v=1, n; n=1, 2, … such that 01n2nby H_n.（f, x, L）≡H_n（f, L） the n-th Hermite-Fejer interpolation

关键词： THEORY OF INTERPOLATION ON INFINITE INTERVAL UNIFORM CONVERGENCE OF STAbLE INTERPOLATION PROCESSES