A multi-item fuzzy Economic Order Quantity (EOQ) model which is a type of fuzzy nonlinear programming problems is considered in this paper. It describes the fuzzy objective and resource constraints with different type...
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ISBN:
(纸本)9783642148798
A multi-item fuzzy Economic Order Quantity (EOQ) model which is a type of fuzzy nonlinear programming problems is considered in this paper. It describes the fuzzy objective and resource constraints with different types of membership functions according to different types of fuzzy objective and constraints. A family of solutions with an acceptable membership degree which is desired by the DM is found in this paper. We use a Genetic Algorithm (GA) with mutation and whole arithmetic crossover. Here, mutation is carried out along the weighted total forces direction using the random step lengths based on Erlang distribution. The total forces are given based on the idear that is to mimic the physics of electromagnetism by considering each individual as electrical charge. The numerical results of the model illustrate the accuracy and efficiency of the algorithm.
In the fuzzy comprehensive assessment method, the used linear weighted average model can not reflect the prominent impact of the indicators. And the nonlinear fuzzy comprehensive assessment model has a complex form an...
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ISBN:
(纸本)9783642148798
In the fuzzy comprehensive assessment method, the used linear weighted average model can not reflect the prominent impact of the indicators. And the nonlinear fuzzy comprehensive assessment model has a complex form and a large amount of calculation. In order to solve this problem in fuzzy comprehensive assessment method, this paper proposes a linear fuzzy comprehensive assessment model with prominent impact factor. Put this model into practical examples, this paper obtained a more convincing result than the weighted average method. And the result is consistent with the result of the nonlinear fuzzy comprehensive assessment, and also reduced the calculation amount.
This paper uses fuzzy AHP to construct the model of evaluating web-based courses. Basing on comparing the triangular fuzzy number's size, this method carries on the single-level sorting, simultaneously uses the mu...
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ISBN:
(纸本)9783642148798
This paper uses fuzzy AHP to construct the model of evaluating web-based courses. Basing on comparing the triangular fuzzy number's size, this method carries on the single-level sorting, simultaneously uses the multistage fuzzy quality synthetic evaluations. It not only overcomes the defects of the big human impact when uses expert evaluation method to get weight, but also considers the fuzziness and hierarchical characteristics of the influencing factor of web-based courses. It makes the conclusions more objective and rational. The method is simple and standardized, easy to program, and practicality.
A classified method for basin floods is proposed based on the variable fuzzy sets theory. This method is used here to classify the basin floods of Dahuofang region. According to the classification the parameters of th...
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ISBN:
(纸本)9783642148798
A classified method for basin floods is proposed based on the variable fuzzy sets theory. This method is used here to classify the basin floods of Dahuofang region. According to the classification the parameters of the flood forecasting model are optimised with in each class and used to forecast the corresponding type of basin floods. The classified forecast results show that the proposed method is reasonable and valuable to forecast the basin floods with good results in simulation and verification. This simple method also can be used in many kinds of multi-objective classification problems.
At present, the research for Fuzzy Petri Net is focused on the Model with no Loop. Based on the idea of object-oriented, this paper defines the outline of the object-oriented fuzzy Petri Net. Listened the characters o...
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ISBN:
(纸本)9783642148798
At present, the research for Fuzzy Petri Net is focused on the Model with no Loop. Based on the idea of object-oriented, this paper defines the outline of the object-oriented fuzzy Petri Net. Listened the characters of researching the loop, we make use of the idea of object-oriented and layering the Fuzzy Petri Net which with loop. As a result, the Petri Net Model on all layers is with no loops. Finally, we develop a simplified algorithm for fuzzy petri net based on all places' Reachability Set, Immediate Reachability Set and Adjacent Place set.
作者：
Ye, QiusunWuyi Univ
Dept Math & Comp Sci Engn Wuyishan 354300 Fujian Peoples R China
In mathematics science, addition is rather simple computation of arithmetic. However, no matter what advanced computer in the world, and no matter what backward calculator (such as abacus in China etc.) in people'...
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ISBN:
(纸本)9783642148798
In mathematics science, addition is rather simple computation of arithmetic. However, no matter what advanced computer in the world, and no matter what backward calculator (such as abacus in China etc.) in people's hand, to do sum of addition is always a NP problem in all the time. Such as capacities of numbers, precise computing (PC), computing precision (CP), perturbation motion (PM) in computing of numbers, etc. This paper makes an algorithm of novel addition with AI-VCR computation in computer, and gives solutions of avoiding the sum's overflowing, insufficient valid figures, PM in arithmetic computation, etc.
The structure of concrete concrete-filled steel tube is a new composite one, the theory about this joints of concrete-filled steel tube beam-column is imperfect, and especially the imperfect dynamic performance of the...
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ISBN:
(纸本)9783642148798
The structure of concrete concrete-filled steel tube is a new composite one, the theory about this joints of concrete-filled steel tube beam-column is imperfect, and especially the imperfect dynamic performance of the joints needs much further study. Now the theoretical research about the constitutive relation between the steel and concrete is inconsistent, and so do the yield criterion. According to the mathematical and mechanical model which is classical, the research of experiments can't be done because of the error of the boundary conditions, the size effect, the loading method, and so on. Besides these, the stress which is complex can't be ignored. As the factors exist, we can't learn about the knowledge of the joints which are tested by their reactions in the effect of the dynamical load. Considering these factors, we carry out finite element analysis on the aseismatic behavior of the joints of new type of concrete-filled steel tubes, which is based on fuzzy mathematics, especially the basic principles and methods give important help to us. The results of the example analysis have showed that the finite element calculation model based on fuzzy mathematics is suited for the mechanical properties of the analysis of the joints. Besides that, results of finite element analysis based on fuzzy mathematics are compared with the data of experiment, and they are valuable methods for design of joints of concrete-filled steel tubes beam-column.
The two failure modes of shell structure, dynamic instability and intensive destruction, have no distinct boundary on their structural performance;they are fuzzy and are difficult to determine problems. By using the c...
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ISBN:
(纸本)9783642148798
The two failure modes of shell structure, dynamic instability and intensive destruction, have no distinct boundary on their structural performance;they are fuzzy and are difficult to determine problems. By using the comprehensive evaluation method in fuzzy mathematics and taking the initial imperfection of the structure into consideration, this paper, taking Kiewitt spherical shell as an example, made parameter impact analysis to the structure, and investigated the influence of span ratios, the initial geometric imperfections and bar cross-section of the structure under earthquake failure mode. Ensuring the relations between a variety of response factors of the structure and fuzzy failure modes, the paper established a power failure mode shell structure of fuzzy comprehensive evaluation model and evaluation method, and described the application of the method in the discrimination of failure mode on Kiewitt monolayer Shell with initial defect;the consequences showed that this method can solve the problem of failure mode identification better with more realistic facts and possesses higher accuracy.
This paper considers the robust absolute stability issues for a class of T-S fuzzy uncertain neutral systems with delays. The uncertainties considered in this paper are norm bounded, and possible time-varying. Based o...
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ISBN:
(纸本)9783642148798
This paper considers the robust absolute stability issues for a class of T-S fuzzy uncertain neutral systems with delays. The uncertainties considered in this paper are norm bounded, and possible time-varying. Based on Lyapunov-Krasovskii functional and linear matrix inequalities approach, the absolute robust stabilization of the fuzzy uncertain neutral systems can be achieved. Two examples are given to demonstrate the effectiveness of the proposed method.
In this paper, first the FKG gray system model based on second-order differential is given. This kind of new algorithm model is composed of fuzzy mathematics, k-means algorithm and grey system based on second-order di...
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ISBN:
(纸本)9783642148798
In this paper, first the FKG gray system model based on second-order differential is given. This kind of new algorithm model is composed of fuzzy mathematics, k-means algorithm and grey system based on second-order differential, which is shorted for FKG system model. Meanwhile, through comparing the dates available in the new algorithm model with the one in the traditional model, the result showed that the new one has more advantages. Finally, we predict the cluster center required from the last month by using the historical date, the results are very satisfactory. This new model is good at predicting short-swing trading stock price and has practical value, which can provide some advices for people who are interested in short-swing trading investment. If people refer to it combined with some other market and social factors the result will be more helpful.
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