نتایج جستجو برای: fuzzy model

تعداد نتایج: 2171733  

Journal: :Mathematics 2021

In the study presented here, fuzzy logic was used to analyze behavior of a model economic dynamics that assumes income be in equilibrium when it is composed consumption and investment, is, savings investment are equal. The considered depend on previous period through uncertain factors, and, at same time, an magnitude across various periods, represented as number with known membership function. ...

2009
Chung-Hung Tsai Han-Lin Chen

Fuzzy theory provides a rigorous, flexible approach to the problem of defining and computing. Therefore, to facilitate decision-making in geographic information system (GIS), the graph layer indicator and the Takagi Sugeno (TS) fuzzy model have to be integrated. This study explains several versions of the TS fuzzy model based on fuzzy theory and fuzzy operation. An inference model is constructe...

2010
Ashraf K. Abd-Elaal Hesham A. Hefny Ashraf H. Abd-Elwahab

Researchers introduce in this paper, an efficient fuzzy time series forecasting model based on fuzzy clustering to handle forecasting problems and improving forecasting accuracy. Each value (observation) is represented by a fuzzy set. The transition between consecutive values is taken into account in order to model the time series data. Proposed model employed eight main steps in time-invariant...

Journal: :مدیریت صنعتی 0
جلیل حسن قاسمی دانشجوی کارشناسی ارشد مدیریت صنعتی، دانشکدۀ مدیریت، دانشگاه تهران، تهران، ایران عالیه کاظمی دانشگاه تهراناستادیار مدیریت صنعتی، دانشکدۀ مدیریت، دانشگاه تهران، تهران، ایران مهناز حسین زاده استادیار مدیریت صنعتی، دانشکدۀ مدیریت، دانشگاه تهران، تهران، ایران

quality of products and services is considered as a key factor for customer satisfaction. quality function deployment (qfd) is known as a critical tool for translating voice of customers to prioritize technical requirements of a production. the level of this satisfaction depends on the number of fulfilled requirements. it should be noted that this level varies according to the possible constrai...

Journal: :iranian journal of fuzzy systems 2010
l iliadis s spartalis

in this paper we propose and construct fuzzy algebraic additive model, for the estimation of risk in various fields of human activities or nature’s behavior. though the proposed model is useful in a wide range of scientific fields, it was designed for to torrential risk evaluation in the area of river evros. clearly the model’s performance improves when the number of parameters and the actual d...

Journal: :international journal of civil engineering 0
jiuping xu state key laboratory of hydraulics and mountain river engineering, sichuan university, chengdu 610064, p. r. china pei wei uncertainty decision-making laboratory, sichuan university, chengdu, 610064, p. r. china

in this paper, a location allocation (la) problem in construction and demolition (c&d;) waste management (wm) is studied. a bi-level model for this problem under a fuzzy random environment is presented where the upper level is the governments who sets up the processing centers, and the lower level are the administrators of different construction projects who control c&d; waste and the after tre...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی 1390

over the past decades a number of approaches have been applied for forecasting mortality. in 1992, a new method for long-run forecast of the level and age pattern of mortality was published by lee and carter. this method was welcomed by many authors so it was extended through a wider class of generalized, parametric and nonlinear model. this model represents one of the most influential recent d...

Alem Tabriz, Akbar , Mojibian, Fatemeh , Roghanian, Emad ,

  Because of the suitability of fuzzy numbers in representing uncertain values , ranking the fuzzy numbers has widely applications in different sciences. Many models are presented in field of ranking the fuzzy numbers that each one rank based on special criteria and features. The purpose of this paper is presenting a new method for ranking generalized fuzzy numbers based on some parameters such...

2009
Ghanshaym Singha Mahapatra

In this paper, single and multi container maintenance model under limited time interval of interest is introduced in fuzzy environment. These fuzzy models are solved by fuzzy geometric programming technique. Here fuzzy geometric programming is discussed through fuzzy decision-making processes with three different operators, max-min, max-average mean, and max-geometric mean. These operators are ...

2006
Zhenbin Du Zifang Qu

Combining both kinds of fuzzy logic forms including fuzzy T-S model and adaptive fuzzy logic systems, this paper presents an adaptive control scheme for a class of nonlinear systems. Firstly, the fuzzy T-S model is used to approximate the nonlinear systems, and the fuzzy control law of the fuzzy model is derived by the linear matrix inequality. Secondly, the adaptive fuzzy logic systems are con...

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