Development and Application of Multimedia CAI Courseware for Optimization Design of Chemical Engineering Courses

Development and Application of Multimedia CAI Courseware for Optimization Design of Chemical Engineering Courses Huang Shihuang, Yu Qi, Ye Chang (College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou, Fujian 350002, China) 5.0 Language and Authorware 5.0 as development tools, successful development of chemical engineering course optimization design multimedia CAI courseware. Courseware has two major functional modules. One is a multimedia learning module. This module can be used to learn modeling ideas and model solving algorithms for operation optimization design of different chemical units. The second is the design and calculation module, which can be used to design different chemical unit operations ( Ordinary design or optimization design, select the appropriate method to perform design calculations. The courseware runs independently under the operating platform, with friendly interface, convenient operation, and reliable and stable operation.

In recent years, more and more multimedia CAI courseware for chemistry and chemical industry has been used to assist teaching and has achieved good results. The teaching research and practice of the optimization design of the Chemical Principle Course in our education reform project won the second prize of the National Higher Education Teaching Achievement Award in 2001. The multimedia CAI courseware for the optimization design of the Chemical Engineering Principle Course is an important part of this achievement. The multimedia CAI courseware mainly uses software such as VisualBasic5.0 and Authorware5.0 as development tools, which integrates text, sound, image and animation. For many years, this courseware has been applied to the teaching practice of optimization design in the principle of chemical engineering, and the teaching quality of course design has been improved.

1 courseware development tools With the continuous development of modern multimedia technology, the CAI courseware developed not only has to have Wenyu. The combination of sounds, images, animations and other media, but also requires a beautiful courseware interface, strong interaction, can improve students' interest in learning and learning. In this way, the more powerful multimedia CAI courseware developed, the higher the technical requirements for development, and it will inevitably use a large amount of development software. Therefore, developers must not only be familiar with professional knowledge, but also be familiar with the application of various software and its interface issues. It can be seen that the development of multimedia CAI courseware is a complex group development process. After several years of efforts by the development team, the CAI courseware of the Chemical Engineering Course has been successfully developed. The courseware has been successfully developed and consists of two major functional modules. The main development tools are described as follows: First, the modeling ideas for the operation optimization design of the chemical unit and the learning module for the model solution algorithm The main flow of the module was developed using Authrware 5.0. The multimedia authoring tool provides an integrated environment for automatic generation of program code, which can easily and quickly produce multimedia courseware. The images used in the courseware are processed using the PhlSh P5.5 software, which uses the colors, image selection techniques, image rendering and trimming, the use of channels and masks, the use of layers, and various filters to make fine art work. The image, such as courseware interface background, interactive button shape, etc., in order to allow students to better grasp the optimization algorithm, each unit operation optimization design modeling ideas and model solution methods, using the animation production software FlaSh5.0W to create text and sound The explanation process of synchronous screening. The use of frame control principle in Flash5.0 software can easily synchronize the sound and text, and run by the Flash5.0 courseware volume is small, and with the Author-ware5.0 interface is convenient. The sounds explained in the courseware use the excellent professional sound processing software CoolEdit2000m.CoolEdit2000 to deal with sound very powerful, recording length can be infinitely long, you can edit the recorded sound, you can remove the recorded sound for editing, you can remove the recording Nasal and murmur in the sound quality.

Another design and calculation module of the courseware is visual language VisualBa- winning awards: won the second prize of the national teaching achievement in 2001 and other education, and the first prize of provincial teaching achievement in Fujian in 2 years Huang Shihuang, etc.: Principles of Chemical Engineering Course Optimization Design Multimedia CAI courseware development and application developed by Sic5.0. Each unit operation, design and calculation of the program interface are made common to run the Windows platform standard program style, including various menu commands and commonly used tool buttons, allowing users to use the software in a very short period of time. Each unit operation program contains parameters such as parameter input, parameter calculation, and parameter output. The optimization design of the chemical engineering course involves many input and output parameters. The types of these parameters are also very different. Only by correctly and efficiently inputting and outputting these parameters can the stability of the program operation be ensured and the correct parameters can be correct for each parameter. The automatic analysis is performed and the dynamic connection is established with the calculation module so that any changed parameters can be fed back to the calculation module in time to ensure the stability and high efficiency of the program operation.

2 Courseware features, interfaces and operating environment 2.1 Courseware Functional Courseware features are mainly two parts, respectively, briefly introduced as follows: First, multimedia learning module. The module teaches univariate optimization (including golden section method, Fibonacci method, object line approximation method, cubic approximation algorithm) and multivariate optimization algorithm (including complex method, random search) in a multimedia manner. Three models of France, Lagrange multiplier method) and each unit operation and the same unit operate different models (including heat transfer, evaporation, absorption, rectification and drying of a total of 16 units operation 16 models) optimization of the design of the model Ideas and solving algorithms.

The second is the design calculation module in the courseware. The module operates a total of 16 models for the above five main units. Under the input design task and related design parameters, appropriate algorithms can be selected for optimal design or conventional design. The conventional design is based on the method described in the existing "Chemical Engineering Principles" textbook. The reason why the conventional design content is still kept in the courseware, the main purpose is to allow students to compare the optimal design results with the conventional design results in order to deepen the optimization Understanding of design, firmly establish the concept of engineering economy, engineering optimization. In the courseware, the price parameters such as equipment, energy, and power required for optimal design are treated as input parameters. Therefore, according to the changes in price parameters at different times and locations, the price parameters can be flexibly adjusted for optimal design. The results can be used as Industrial design basis.

2.2 Interface of Courseware Multimedia CAI Courseware Learning Module Main Interface Mathematical Model Learning Module Interface Tube Heat Exchanger Optimization Design Main Interface Multi-effect Evaporation System Optimization Design Main Interface Courseware The bottom right foot has two buttons, the functions of which are background music control and exit respectively. Multi-media learning; the other four circular buttons on the interface from the upper left along the arc are the buttons for entering courseware help, preface description, mathematical modeling, and optimization algorithm learning. A modeling learning interface in the multimedia learning module is given. The buttons on the interface include the upper and lower page switching, the returning to the main interface and the direct and end page direct jump function. The main interfaces of the optimized design and calculation module for heat transfer, evaporation, absorption, rectification and drying of the unit operation are given respectively. Each interface contains design parameter input, calculation method selection, and calculation result output functions, all of which are implemented by some sub-forms. Indicates the installation interface of the above five unit operation design calculation module under Windows.

f Multi-Hydrant Reaming Machine and Right-handed Weld In order to facilitate the operation, we also placed a quick command button on the main interface. Its functions are: Engineer's Manual (click it to enter the multimedia learning module), select design model, open file, save file, print, data input, design calculation, calculation result, adjust form, help and exit. Thanks to the use of visual language VB and object-oriented programming technology, the courseware developed has the advantages of powerful functions, friendly interface, convenient operation and stable operation.

3 Courseware Application Absorption Tower Optimization Design Main Interface Distillation Tower Optimization Design Main Interface Desiccator Optimization Design Main Interface Chemical Engineering Course Optimization Design After the successful development of multimedia CAI courseware, after 95, 96, 97, 98 chemical engineering and Students in the fields of process, biochemical engineering, food engineering, environmental engineering, etc., have experimented in the “Principles of Optimization of Chemical Engineering Principles” teaching practice. It is generally believed that the courseware has a friendly interface, convenient operation, and stable operation. We integrate engineering and economic perspectives, engineering optimization techniques, and computer-aided design techniques into the teaching practice of curriculum design of chemical engineering principles, and use modern teaching methods such as CAI courseware to improve the quality of teaching. We have made breakthroughs in the reform of teaching content, methods, and methods. After years of teaching practice, it has proved to be effective in cultivating and improving students' scientific quality and comprehensive ability.

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