Application of MATLAB in Chemical Calculation CAI

1 The importance of CAI in chemical calculations based on MATLAB The role of chemical calculations in the teaching of chemical engineering courses is very important. After listening to the teacher's explanation, students must consolidate classroom knowledge through a large number of exercises to deepen their understanding of basic concepts and theories. In the teaching of chemical engineering, chemical thermodynamics and reaction engineering theory, mathematical physics methods such as mathematic reasoning, chemical calculation, and graph solving are used in many ways. When teaching is not properly handled, it is easy to turn chemistry into mathematics, and students see mathematics with a full blackboard. Formulas are also prone to irritability and distraction. Using computer-aided teaching based on MATLAB in chemical calculations, mathematics has become very concise, and teachers can focus on explaining the calculation principles and methods of the chemical process. For example, in the teaching of "Chemical Engineering Thermodynamics", teachers in class use limited hours to describe the principles and methods of thermodynamics calculations. Then they instruct students to further strengthen the learning and training of chemical calculations through some software packages of the ECSS system, and achieved good results. Effect Due to the principle of chemical engineering, reaction engineering chemical thermodynamics is usually based on the actual engineering problems. The data objects often involved in the operation of the solution are usually arrays. The specific chemical calculations involve difference, integral, parameter fitting, and solution differentiation. And partial differential equations solve linear and non-linear equations and other engineering calculation methods, the calculation volume is generally large, especially when the problem conditions are lacking, it is often necessary to perform several times, dozens or even dozens of repeated calculations on the same formula to obtain the result. Not only is the problem solving low in efficiency, but also objectively restricting the use of MAT-Language in teaching content. Differentiation, integration, and even mathematical derivation and mapping have become easy, and there is no need to memorize a large number of chemical calculation formulas to gradually transform students. Learning concepts, changing over-reliance on teacher textbooks and being Recipients of knowledge and old habits of thinking in isolation, take the initiative to contact and creating learning. The application of chemical simulation calculation software of chemical pipeline calculation and fluid transportation equipment based on MATLAB language in the teaching of "Chemical Engineering Principles" has fully proved the important theoretical and practical value of developing CAI software based on MATLAB chemical engineering Yue Xuehai et al.: MATLAB The application of CAI in chemical calculation 2 The implementation of CAI based on MATLAB for chemical calculation 2.1 The content of CAI based on MATLAB for chemical calculation The content of CAI software based on chemical calculation is a software package for the computer aided teaching system of chemical engineering. MATLAB's powerful calculation and graphing capabilities highlight the open and visual teaching features and reflect the hierarchical, relevant, and holistic nature of chemical calculations used in chemical engineering major courses. It is suitable for chemical engineering undergraduate students as a Required courses to learn.

The software mainly consists of two parts. The first part is based on the computer-aided calculation of the basic principle of the professional basic course chemical engineering, and the development of the simulation calculation of the operation of the chemical unit; the second part is mainly based on the computer-aided calculation of the chemical engineering thermodynamics, reaction engineering chemical principle and other professional courses. Simulation calculation of a typical chemical process 2.2 Implementation scheme of CAI software based on MATLAB for chemical calculation 2.2.1 Structural analysis Based on the overall concept of CAI for chemical calculation, a “modular” computer-aided teaching for chemical calculation based on MATLAB was established.

Teaching system structure, general description such as chemical engineering "modular" teaching system structure (1) teaching object set Chemical computing computer-aided teaching system teaching object mainly has physical data, unit operation typical chemical process and commonly used numerical calculation method (2) teaching The software set compiles CAI teaching content objects according to chemical engineering, uses MATLAB pre-defined commands and functions, and compiles three large-scale visualization software modules for chemical calculation CAI process call and simulation, providing students with an intuitive chemical calculation model.

The software is mainly composed of three basic modules: (3) series of textbooks, which are derived from the calculation of basic chemical property data, simulation calculations of chemical unit operations, and simulated calculation data processing of typical chemical processes. In order to guide teachers and students to use CAI software in the chemical environment under the MATLAB environment, and write relevant guides, such as: MATLAB-based chemical calculation study guidance, MATLAB-based chemical computer-aided calculation principle, and MATLAB-based chemical calculation programming. The main content can also be used as a software "help" to embed 2.2.2 concrete implementation plan combined with the concept of three modules of CAI system for chemical calculation, and to establish a development plan based on MATLAB chemical calculation CAI: (1) Chemical calculation CAI software, about the typical function The expression uses the corresponding calculation method and MATLAB calculation toolbox to combine, transforms into the convenient programming formula, forms the MATLAB chemical calculation subroutine.

(2) Using the GUI tools in the MATLAB environment outside the subroutine program to compose the operation interface and the simulation presentation function. The data transmission between the interface and the calculation program is completed by the data file, making the interface and the chemical calculation program well At the same time as the connection, the implementation documents for each chemical calculation interface, principle introduction, and process calculation have their own input and output functions. (3) Integration of chemical calculation subroutines, and the formation of interrelated physical property data for each course Independent software package for the simulation of unit operations (4) Based on the types of chemical calculations, combined with the characteristics of course teaching, the MATLAB chemical calculation CAI system with the teaching characteristics of chemical engineering is constructed to form a complete system software.

3 Conclusions Exercise calculations in business courses enable students to use computer to perform more complex calculations of chemical exercises. Effectively improve student's ability in programming from the computer theory teaching stage of basic courses to the practical stage of engineering and science. Computer-aided instruction in chemical computing In the process, students can further learn the application of MATLAB in chemical calculation and data processing and some commonly used calculation methods to deal with chemical engineering problems, and improve the ability to analyze and solve practical engineering problems.