Design and Development of Multimedia Courseware Chemical Technology

1 Courseware Structure The production of multimedia courseware in chemical engineering is divided into teaching editions and self-learning editions. The teaching edition is mainly used by teachers to use multimedia in class, and the self-learning edition is mainly used for students to use campus nets to study on computers after class. According to the principle of combining teaching and practice, progress and reinforcement, the four shared modules are designed: the syllabus, demonstration pictures, and video clip simulation questions have all the functions from teaching to examination and examination. The block diagram is as shown.

卞 * Single System Block Diagram (1) Syllabus: The content is refined from the theoretical knowledge of the discipline. In the teaching, the key points and outlines of the lectures are displayed. The teacher makes in-depth explanations and explanations according to them.

(2) Demonstration pictures: Pictures are static and dynamic. The static picture plane depicts the process flow path device structure involved in the course.

Fund Project: Henan University's dynamic picture for the 21st Century Teaching Reform Project (2001-2003) is animated on the basis of still pictures, highlighting the new development of the table horse, etc.: design and discovery of multimedia courseware chemical technology Input and output status, device working principle, and 3D animation for some typical devices.

(3) Video clips: timely playback of the actual factory floor layout, production environment on-site operation (4) simulation test questions: according to the learning process designed the appropriate test questions through the computer and students "question one answer and feedback" interaction, students can be tested The degree of mastery of what you have learned.

2 courseware production 3DSmax and other software, teaching version to PowerPoint as the basic platform, self-learning version of FrontPage as the basic platform, set up related hyperlinks to the four modules constitute a whole, placed in the network center server, if necessary, according to course progress Or the free learning of the learning situation 2.1 The production of the material library Each chapter of chemical technology introduces the production process of one or a kind of chemical products. It involves a large number of technological processes, domestic and international production routes, key equipment, etc. Oral descriptions and short-term factory traineeships make it impossible for students to fully comprehend. This requires us to make these abstract and difficult-to-explicit contents of teachers into materials. How to solve the production of materials and graphics, animation, video processing and other technologies are reflected in the application of software focused on the needs of different content, we in the performance of the internal structure of the device, the use of 3DSmax 3D animation form; in the general process of performance In the block diagram, flexible Flash animations are adopted; With AutoCAD; in the performance of the factory site, using video recording to make courseware more scientific image, vivid and rich.

The vector graphic vector graphics have no relation with the resolution and can be displayed on output devices with different resolutions without loss of image quality. When there is a strong adaptability for picture production, first of all, pay attention to establishing the idea of ​​“blocking” in the chemical industry. In the process diagram, many equipment schematics are represented by fixed symbols. They are large in the reaction kettle distillation tower, as small as heat exchangers, pumps, arrows, etc., have a very strong general-purpose production, in order to avoid duplication, will be commonly used equipment Make a block, and set its application properties, in order to prepare for transfer, followed by attention to stratified drawing, for complex craft drawings, can be divided into several layers to draw, respectively set to a different color rejection layer to organize the map can make the graphic more concise, also More manageable (2) Flash and 3DSmax use. Dynamic pictures are based on static images. Flash supports AutoCAD DXF10 version, converts DWG files into DXF type, and then imports the Flash to animate, which is very convenient and improves the production efficiency as shown.

In some key components or equipment, use 3DSmax 3D modeling to select an appropriate angle and render it. The AVI file is inserted in the courseware. The teaching effect is very obvious. It is the most common tank reactor in chemical production. Although its internal structure is relatively simple, its working condition is more complicated, especially when the material is added into the reactor and the agitator works. The material will stir up. As the mixing speed increases, the reaction status will change. After expressing with 3Dmax, students can understand the internal structure of the reactor (b) and can see the screen after adding the reaction material ( c) Continually playing in courseware so that students are in the realm of their own, achieving the purpose of heuristic teaching. (3) Video clips. A planned chemical plant with a certain scale and advanced technology was used to take some shots of the layout of the workshops and operations on site and make them into video clips. The chapters and processes that were pre-trained before the internship were shown in the same position as the textbooks and course materials. , reached the agreement of perceptual knowledge and rational knowledge.

Crude Oil Vacuum Distillation Process 2.2 Test Question Bank Structure As shown. In the campus online students can freely call, teachers can also demonstrate or explain in the classroom test question bank test question bank includes a large number of objective questions, the use of interactive mode of operation, some questions have time constraints, evaluation of students mastery of knowledge laboratory research and Exploring the features of the test item database structure box courseware 3.1 Solving the problems of less practice and less experimentation For a long time, due to the inadequate communication between the school and the enterprise, resulting in less time for the students to practice in the factory, the lack of school experimental equipment and other factors, the theory of engineering students Learning and practice are seriously out of line and engineering awareness is poor. The CAI courseware makes full use of the large-screen projection system, and the information that cannot be expressed on the blackboard is accurately, vividly, and intuitively presented to the students. For example, the two-dimensional animation expresses the flow of materials and the working principle of the equipment. The conventional reactor model designed by using three-dimensional animation can intuitively display the structure and internal components through rotation and sectioning, which can greatly improve students’ interest in learning. The screenings created an atmosphere of an industrial environment where students are on the ground. Not only do they have a stronger sense of perception of the actual industry, but they also have an increase in the imagination of the engineering equipment. 3.2 The content and form of flexible production, due to the syllabus, The library of test questions is created as an independent module, and PowerPoint uses FrontPage as the development and application platform. Therefore, teachers can easily compose courseware of different styles and levels according to the characteristics of lesson preparation and supplement the development of disciplines and research fields. The latest developments allow students to understand the latest technological developments. Thanks to the development of classroom and online dual-platform teaching systems, students can make full use of their spare time to review and consolidate the knowledge gained in the classroom, and effectively solve the outstanding problems caused by multimedia teaching that result in too much information in the classroom and difficult for students to digest. 3.3 Flowchart Layered screening, local amplification function Many of the technological processes in chemical engineering are very complicated, the equipment is numerous, and the pipelines are intertwined. Even if they are displayed on a large screen, it is difficult to sort out.

In the production, pay attention to set the graphics to different colors, widen the line type, easier to distinguish between different layers of the pipeline to simplify the complex graphics, to achieve a clear effect for the fine components of key equipment can be partially enlarged display, due to the vector In the figure, the display effect does not change.

4 Concluding remarks The multimedia teaching courseware has made up for the insufficiency of traditional teaching with its unique advantages, and has brought about changes in teaching methods and teaching methods. At the same time, the rise of media teaching courseware has laid a foundation for the healthy development of multimedia teaching and updating of teaching content and improving teaching structure. A certain foundation