:biquarterly journal of control and optimization in applied mathematics2015
jahanshahloo has suggested a method for the solving linear programming problems with zero-one variables. in this paper we formulate fully fuzzy linear programming problems with zero-one variables and a method for solving these problems is presented using the ranking function and also the branch and bound method along with an example is presented.
:international journal of industrial engineering and productional research-0
navid khademi département economie-gestion, ecole normale supérieure de cachan, france afshin shariat mohaymany iran university of science and technology jalil shahi iran university of science and technology mojtaba rajabi iran university of science and technology
most of the researches in the domain of fuzzy number comparisons serve the fuzzy number ordering purpose. for making a comparison between two fuzzy numbers, beyond the determination of their order, it is needed to derive the magnitude of their order. in line with this idea, the concept of inequality is no longer crisp however it becomes fuzzy in the sense of representing partial belonging or de...
in this note, we aim to present some properties of the space of all
weakly fuzzy bounded linear operators, with the bag and samanta’s operator
norm on felbin’s-type fuzzy normed spaces. in particular, the completeness
of this space is studied. by some counterexamples, it is shown that the inverse
mapping theorem and the banach-steinhaus’s theorem, are not valid for
this fuzzy setting. also...
:international journal of industrial mathematics2015
m. adabitabar firozja s. firouzian
it is well known fact that binary relations are generalized mathematical functions. contrary to functions from domain to range, binary relations may assign to each element of domain two or more elements of range. some basic operations on functions such as the inverse and composition are applicable to binary relations as well. depending on the domain or range or both are fuzzy value fuzzy set, i...
:international journal of industrial mathematics2016
a. a. hosseinzadeh f. hosseinzadeh lotfi z. moghaddas
comparing the performance of a set of activities or organizations under uncertainty environment has been performed by means of fuzzy data envelopment analysis (fdea) since the traditional dea models require accurate and precise performance data. as regards a method for dealing with uncertainty environment, many researchers have introduced dea models in fuzzy environment. some of these models ar...
in this paper a linear fuzzy fredholm integral equation(ffie) with arbitrary fuzzy function input and symmetric triangular (fuzzy interval) output is considered. for each variable, output is the nearest triangular fuzzy number (fuzzy interval) to the exact fuzzy solution of (ffie).
in this paper, we present a revised similarity measure based onchen-and-chen's similarity measure for fuzzy risk analysis. the revisedsimilarity measure uses the corrected formulae to calculate the centre ofgravity points, therefore it is more effective than the chen-and-chen'smethod. the revised similarity measure can overcome the drawbacks of theexisting methods. we have also proposed a new ...
Graph theory has an important role in the area of applications of networks and clustering. In the case of dealing with uncertain data, we must utilize ambiguous data such as fuzzy value, fuzzy interval value or values of fuzzy number. In this study, values of fuzzy number were used. Initially, we utilized the fuzzy number value fuzzy relation and then proposed fuzzy number-value f...
m. mosleh department of mathematics, islamic azad university, firuozkooh branch,
firuozkooh, iran. s. abbasbandy department of mathematics, science and research branch, islamic azad
university, tehran 14515/775, iran. m. otadi department of mathematics, islamic azad university, firuozkooh branch,
in this paper, a numerical method for nding minimal solution of a mn fullyfuzzy linear system of the form ax = b based on pseudo inverse calculation,is given when the central matrix of coecients is row full rank or column fullrank, and where a~ is a non-negative fuzzy mn matrix, the unknown vectorx is a vector consisting of n non-negative fuzzy numbers and the constant b isa vector consisti...
:international journal of data envelopment analysis0
mohamad adabitabar firozja department of mathematics, qaemshahr branch, islamic azad university, qaemshahr, iran mohamad adabi firozjaei department of management , babol branch, islamic azad university, babol, iran. mousa eslamian phd student of management, semnan branch, islamic azad universal university, semnan, iran.
in this paper, we consider the production possibility set with n production units such that the following four principles that governs: inclusion observations, conceivability, immensity and convexity. our goal is to estimate the output of a same and new production unit with existing production possibility and amount of input is specified. so, initially we find the interval changes of each input...