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Mechanical Design Application of fuzzy set theory

Education CLC number: 0552 Document code: A Article ID :1004-0862 (2007) 01 (a) a 0005-02 the chemical industry in the national economy plays a very important position, chemical separation equipment typically accounts for the total chemical plant equipment 30% -85% of investment, therefore, chemical separation process in chemical industry plays a very important position. With the rapid development of chemical industry, new chemical separation techniques become increasingly important. Reform in higher engineering education, chemical and pharmaceutical professional not only in specialized courses on the basis of pre-course study the chemical production complex Systems of the actual separation and purification technology, starting from the separation process common to discuss the various separation method of characteristics; understand the separation process of the cutting-edge technology, professional knowledge for later learning, in professional and lay a good foundation of scientific research _1t. Therefore, short hours of instruction in the current conditions, speak good separation of engineering courses,[link widoczny dla zalogowanych], improve teaching effectiveness, it is particularly important. In order to improve teaching effectiveness and professional courses chemical quality of teaching to develop students ability to innovate. The project is planned to separate the teaching reform projects, for example, in teaching practice, to explore a new teaching mode to improve the quality of the training project,[link widoczny dla zalogowanych], various types of engineering disciplines to promote higher education teaching major courses. A need for curriculum reform, separation of teaching chemical and pharmaceutical engineering is the professional one of the most important specialized courses, and its task is to study the process of separation and purification of substances in industrial engineering disciplines, mainly on the mass transfer and separation engineering principles and applications, and chemical separation process of separating some of the major engineering unit operations and separation of progress. Separation Engineering course reveals the nature of chemical separation process of law, focuses on the industrialization of the suitable separation means amplification equipment design, optimal separation line and the optimal operating conditions of industrialization. In the selection of specific separation method, requires not only technically feasible and economically reasonable, and to consider energy, environmental protection, equipment and development costs and other issues to enlarge a I. Separation Engineering course curriculum is characterized by comprehensive, wide-ranging, involving biochemistry, physical chemistry, chemical thermodynamics, chemical reaction engineering, transfer process principles and the basis of chemical machinery and equipment and other basic knowledge, but requires a strong mathematical foundation and programming data processing capability; engineering practice strong, its purpose is to train students to use engineering tools to analyze and solve practical problems, involving many engineering textbooks empirical correlation, not engineering thinking and practice is difficult to understand the content The 15,6 I. Engineering courses by the dry separation of the chemical engineering involved in all aspects of the basis points more, more empirical knowledge content, and separation technology and new and emerging with the separation device, therefore, to change the traditional teaching mode,[link widoczny dla zalogowanych], with the actual industrial processes carried out separate engineering study and practice of teaching to enhance students creative ability, a very important practical significance and practical value. 2, the content and teaching reform project focusing on isolated problems in teaching and the characteristics of the course, put forward the reform of teaching content, the reform objectives and priorities. Separation of teaching reform of engineering content is teaching programs �� Optimization: The project combined with the current and new technologies, new processes, new equipment, to study the inherent laws of teaching content,[link widoczny dla zalogowanych], teaching important and difficult to work out a reasonable teaching program �� intention to change the traditional teaching methods, the use of discussion-style teaching methods and research-based organization of teaching, �� to change the traditional-style operation to solve problems mainly in the form, the use of multiple research projects and topics of research funds: Henan Higher Education Reform Research Grant 2006102-63), Henan University, teaching fifth-funded projects (2005I155) (9) two equations into (2) get fuzzy failure probability of A) 1 / {�� (y1), �� (y2) 1 Standard normal distribution function, Y1Y2 Yamashita is determined: = [Cr Finally, the fuzzy reliability is, R = l-P (A), so we can define fuzzy reliability, find the part does not occur or the probability of fatigue failure to fuzzy set to determine the reliability of components under the conditions of main dimensions. 6 Conclusion In this paper, the ambiguity of the fatigue strength design paper discusses the related theory of fuzzy reliability, given that their membership function of fuzzy state machine design in order to calculate the fuzzy reliability, but also according to Fuzzy Reliability calculate the corresponding parameters. As can be seen from the analysis, fuzzy set theory in a dry mechanical design, reliability optimal design can solve the other can not solve the problem. FRIENDOFCHEMICALINDUSTRY �� 5

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