ChemDraw软件联用Flash在大学化学实验教学课件制作中的应用

结合ChemDraw软件和Flash动画特点,二者可联用于大学化学实验教学课件制作。阐述了联用两种技术制作大学化学实验课件的基本方法和应用实例。两者的联用不仅生动形象地呈现复杂实验原理和过程,而且能激发学生学习兴趣、促进理解、提高学习效率。     

Solution of the isochoric–isoenergetic flash problem by direct entropy maximization

A new algorithm to find the phase equilibrium conditions in systems with specified values of internal energy, volume, and number of moles of each component present (isochoric–isoenergetic flash problem) is proposed. The core of the procedure consists of maximizing the system entropy by iterating on the values, in each phase, of internal energy, volume, and number of moles of each component. Analytical expressions for the physical properties and derivatives required by the calculations were generated by computer algebra. The algorithm tests for the possible need to add or remove phases during the course of iterations. The paper discusses possible numerical difficulties during application of the procedure and how to overcome them. The algorithm has shown to be robust and capable of solving multiphase equilibrium problems, avoiding trivial solutions.     

Flash二维动画教学的三维思考

针对Flash课程的特点,对Flash教学进行了“三维”思考．一是层次清晰的“模块化”知识结构设置;二是基于心理效应的“特色化”教学方法设置;三是加深学生记忆的“流程化’’教学内容设置．其目的是激发学生的学习兴趣,提高教学效果．     

火光爆炸闪光强度测量系统

本文介绍了一个宽量程、高精度的火光爆炸闪光强度测试系统。本系统是采用ATMEGA128单片机作为中央处理器,高灵敏度光电倍增管作为测光探头,高精度放大器OPA4132作为信号调理电路,高速A/D转换芯片MAX1304作为数据采集模块,高速USB芯片CY7C68013A作为通信传输模块,以及采用基于VC＋＋的虚拟仪器LabVIEW作为人机操作界面。通过本系统将能把闪光强度数据实时的在PC机上显示出来。     

Investigation of the Evolution Behavior of Light Tar During Bituminous Coal Pyrolysis in a Fluidized Bed Reactor

The evolution behavior of the light tar fraction of tar during large bituminous coal particle pyrolysis in a fluidized bed reactor at 500-900℃ was investigated to optimize the industrial process. The coal residence time was varied from 30 s to 150 s. The crude tar obtained was distilled and separated into the light fraction and the heavy fraction through an evaporator under conditions of 280℃ and 10⁴ Pa. The light tar was subjected to GC-MS analysis, and the 300 main species in each spectrum were determined and analyzed. The experimental results showed that the evolution behavior of the light tar fraction and the heavy tar fraction presented spectacularly different variation trends with pyrolysis temperature and coal residence time. The molecular weight and number of rings per aromatic compound molecule contained in the light tar fraction increased with increasing pyrolysis temperature because of polymerization. It was also observed that the amount of methyl substituents decreased with an increasing number of rings per molecule of poly-aromatic ring compounds. The chain aliphatic compound evolution was suppressed and underwent heterocyclization with increasing temperature.     

基于Flash的分形树生成及其动画效果的实现

探讨了在Flash中实现迭代函数系统、图形迭代系统和L系统的思路和方法.重点研究了基于Flash的分形树生成方法,通过把迭代函数系统与Flash中的影片剪辑技术相结合来构造分形树.在此基础上探究了Flash中生成分形动画的两种方法.通过添加鼠标交互、影片运动录制和回放功能以及通过修改参数,实现了"舞动的树".     

Flash在锁相与频率合成教学中的应用

结合Hash交互性强、形象生动的特点,以锁相环路非线性性能分析为例,介绍了Hash在锁相与频率合成教学中的应用。在实验中进一步体现了多媒体在学科教学中的特点和作用,实现了多媒体技术和传统教学的结合,软件达到提高课程教学质量及学习效率的效果,扩展了教学的深度和广度,实际授课效果良好。     

计算机二维动画处理编辑技术综述

介绍了动画的原理和动画的类型,重点阐述了二维动画的制作过程及相应的处理软件、二维动画与三维动画比较以及制作二维动画的基本步骤等。     

FLV视频的制作及教学应用

FlashVideo（FLV）作为一种新的视频格式,具有压缩率高、解码快、图像质量好的特点,在网络上十分流行,已成为网络视频的主流格式。FLV视频的制作十分方便,具有多种灵活的形式。在教学中,FLV视频的应用前景也是十分广阔的。