MATLAB在物理实验CAI课件制作中的应用

介绍了MATLAB在物理实验CAI课件制作中常用的两种应用情况:在CAI课件中应用MATLAB软件和应用MATLAB GUI制作课件。将MATLAB制作的物理实验CAI课件引入教学,可以增加课件的交互能力,激发学生的学习兴趣,丰富实验教学内容,提高教学质量。     

中学物理自制教具设计制作的研究与实践

中学物理实验教学的目的,一是通过实验建立学生对课堂讲授内容的感性认识,加深对学习内容的理解和记忆,以提高教学效果;另一是开发学生智力,训练学生的实验技能,培养学生独立分析、解决问题的能力与创新的初步能力.在实验教学的改革实践中,我们体会到根据物理学科的特点,设计和制作直观具体、形象生动的教具,很好地突破教学的重、难点,从而达到从感性到理性,从具体到抽象,从简单到复杂的教学目的,是教学成败的关键.下面从几个方面阐述如何设计和制作物理教具,促进学生的学习与认识.     

基于Web的多媒体CAI课件物理教学

随着计算机技术的飞速发展,所制作课件的趣味性、实时性、交互性和可重用性都不断增强,这无疑都是对传统物理教学极为重要的补充和开拓性发展.计算机辅助教学已经逐渐成为各个学校提高教学质量的有效手段.高质量的CAI课件充分地挖掘了CAI的优势核心,满足了新形势下物理实验教学的需要,也改变了传统物理教学的许多方式.     

物理实验CAI

本文介绍了CAI软件的开发及应用，并阐述了CAI对物理理论和物理实验教学所起的作用。     

中学物理实验教学改革纵览

中学物理实验教学改革纵览张景泉（辽宁师范大学物理系，大连１１６０２２）物理实验教学的改革，是物理教学改革的重要内容，为了更好地培养学生学习物理的兴趣，加强学生实验能力的训练，改变物理“难教难学”的窘境，全面提高物理教学的质量。广大教师根据教育心理学的...     

基于H5技术的移动学习在物理实验教学中的应用

在物理实验教学过程中,采用H5技术,以手机、平板、电脑为媒介发布课前思考题,提供课堂实验操作步骤,给出课后数据处理指导,完成教学内容的传播.通过应用移动学习平台,可以解决学生学习过程中的问题,实现线上学生和教师之间的交流互动,还能够采集学生学习过程的数据并进行分析,优化传统课堂教学内容,更新移动教学内容,促进物理实验教学模式改革,提高学生学习效率和课程的教学质量.     

大学物理实验CAI课件的应用

CAI课件的应用有利于加强学生对基础知识的理解、记忆和拓宽知识面，有助于提高学生学习的主动性和积极性，增强动手能力，克服教与学的盲目性，全面提高实验教学质量．     

实验室开放与网络多媒体教学

开放物理实验教学能够激发学生学习的主动性和积极性，有利于培养学生的创新能力。本通过介绍开放实验教学的几种模式，说明实验室开放要与网络多媒体教学相结合，最后介绍了开放网络多媒体实验教学达到的效果。     

近代物理实验CAI课件的研究与开发

本结合实例介绍了近代物理实验教学CAI软件的开发过程及制作方法。展看了近代物理实验的CAI课件在实验教学中的优越性及其广阔的应用前景。     

一个分光计实验CAI课件的研制

CAI（计算机辅助教学）是计算机科学与教育科学相结合的产物，如何将CAI引进到物理实验教学中，改进教学手段，提高教学效率？本文通过一个典型实验（分光计的调节和固体折射率的测定）CAI课件的研制，谈谈在这方面的探索。     

Guided-Wave Two-Dimensional Acousto-Optic Scanner Using Proton-Exchanged Lithium Niobate Waveguide

Two-dimensional scanning of a 0.6328 mum guided-light beam has been realized using noncolinear acousto-optic (AO) coplanar Bragg diffraction together with colinear AO guided-mode to substrate radiation-mode conversion in a Z-cut Xpropagation LiNbO3 proton-exchanged (PE) waveguide. The two surface acoustic (SAW) waves utilized are at the center frequencies of 500 and 200 MHz, propagating in the Y and X axes, respectively. Two-dimensional scanning of approximately 720 resolvable light beam spots, namely, 18 40 (horizontal vertical) scanning, has been demonstrated using a light beam of 1.0 mm aperture. The total number of resolvable beam spots can be greatly increased from 720 by simply utilizing SAW transducers of larger bandwidth and a light beam of greater aperture. It should also be possible to significantly increase the diffraction efficiency from 3 % by optimizing the parameters of the PE waveguide and the SAWs.     

Effect ofγ-radiation on the spectral luminescence characteristics of impure cadmium tungstate crystals

Results of a study of the effect of γ-radiation on the spectral luminescence properties of cadmium tungstate crystals doped with silver, bismuth, and molybdenum cations are presented. Spectral characteristics of the nondnnnoped crystals are briefly described. Absorption and photo and X-ray luminescence spectra of the crystals taken before and after exposure to γ-radiation (5.5·10⁴ Gy) are compared. It is found that the spectral characteristics of the crystals doped with silver, bismuth, and molybdenum cations do not change markedly after the exposure. The relation between the type of impurity-induced defects, individual characteristics of the impurity cations, and the character of the effect of γ-radiation on the spectral luminescence properties of impure crystals is analyzed (preliminarily). Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 64, No. 1, pp. 55–60, January–February, 1997.     

Femtosecond Transform-Limited Pulse Generation by Compensating for the Linear Chirp of SPM Spectra in Dispersion Shifted Fibers

A simple technique of pulse compression, based on the linear chirp compensation of self-phase modulation (SPM) spectra in dispersion shifted fibers, is demonstrated. The optimization procedure is carried out, for a short span of a single-mode fiber, using a parabolic law, which describes the behavior of the squared output pulse width versus the pump peak power in the case of Gaussian pulses. The experimental results give a minimum pulse duration of 233 fs, which is in good agreement with the model. Shorter and coherent pulses, down to 90 fs, have been obtained by inserting an interference filter at the optical output.     

Sorting of bending magnets for the SSRF booster

The Shanghai Synchrotron Radiation Facility(SSRF)booster ring,a full energy injector for the storage ring,is deigned to accelerate the electron beam energy from 150MeV to 3.5GeV that demands high extraction efficiency at the extraction energy with low beam loss rate when electrons are ramping.Closed orbit distortion(COD)caused by bending magnet field uniformity errors which affects the machine performance harmfully could be effectively reduced by bending magnet location sorting.Considering the affections of random errors in measurement,both ideal sorting and realistic sorting are studied based on measured bending magnet field uniformity errors and one reasonable combination of bending magnets which can reduce the horizontal COD by a factor of 5is given as the final installation sequence of the booster bending magnets in this paper.     

Measurement of nonlinear coefficient of optical fiber based on small chirped soliton transmission

We measure the waveform and phase curves of short optical pulses before and after transmission over different lengths of fibers by use of the pulse analyzer with the frequency-resolved optical gating (FROG),and numerically simulate pulse evolution under the experimental conditions.The nonlinear coefficient of the fiber is given by comparing the experimental results with the numerical ones.Difference between the experiment and numerical simulation is analyzed.     

Resonance scattering of canonical elastic shells in absorbing fluid medium

Resonance scattering of elastic spherical shell and cylindrical shell while the surrounding fluid medium has absorption is studied. The normal mode solution derived using exact elastic theory and the separation of variables is still applicable. However, the scattering form function has to be modified for the absorbing medium, otherwise the unreasonable result would be obtained. The backscattering form function in the absorbing medium is redefined, and the form function of elastic spherical and cylindrical shell with vacuum or solid matter filled is calculated in various absorption conditions. The results show that the absorption of surrounding fluid leads to notable attenuation of the coincidence resonances in the mid-frequency, but it has a little influence on the low-frequency resonance scattering induced by the filler inside the shell.     

Single-beam self-referenced phase-sensitive surface plasmon resonance sensor with high detection resolution

A versatile and low-cost single-beam self-referenced phase-sensitive surface plasmon resonance(SPR)sensing system with ultra-high resolution performance is presented.The system exhibits a root-mean-square phase fluctuation of ±0.0028.over a period of 45 min.i.e.a resolution of±5.2×10-9 refractive index units.The enhanced performance has been achieved through the incorporation of three design elements:a true single-beam configuration enabling complete self-referencing so that only the phase change associated with SPR gets detected,a differential measurement scheme to eliminate spurious signals not related to the sensor response,and the elimination of retardation drifts by incorporating temperature stabilization in the liquid crystal phase modulato .Our design should bring the detection sensitivity of non-labeling SPR biosensing closer to that achievable by conventional fluorescence-based techniques.     

Influences of SiO2 protective layers and annealing on the laser-induced damage threshold of Ta2O5 films

Ta2O5 films are prepared on BK7 substrates with conventional electron beam evaporation deposition.The effects of SiO2 protective layers and annealing on the laser-induced damage threshold (LIDT) of the films are investigated.The results show that SiO2 protective layers exert little influence on the electric field intensity(EFI)distribution,microstructure and microdefect density but increase the absorption slightly.Annealing iS effective on decreasing the microdefect density and the absorption of the films.Both SiO2 protective layers and annealing are beneficial to the damage resistance of the films and the latter is more effective to improve the LIDT.Moreover,the maximal LIDT of Ta2O5 films is achieved by the combination of SiO2 protective layers and annealing.     

A stereo matching algorithm using multi-peak candidate matches and geometric constraints

Gray cross correlation matching technique is adopted to extract candidate matches with gray cross correla- tion coefficients less than some certain range of maximal correlation coefficient called multi-peak candidate matches. Multi-peak candidates are extracted corresponding to three closest feature points at first. The corresponding multi-peak candidate matches are used to construct the model polygon. Correspondence is determined based on the local geometric relations between the three feature points and the multi-peak candidates. The disparity test and the global consistency checkout are applied to eliminate the remaining ambiguous matches that are not removed by the local geometric relational test. Experimental results show that the proposed algorithm is feasible and accurate.