نتایج جستجو برای: fuzzy and probabilistic uncertainty

تعداد نتایج: 16875986  

Journal: :Reliable Computing 2007
Rafi L. Muhanna Hao Zhang Robert L. Mullen

Latest scientific and engineering advances have started to recognize the need of defining multiple types of uncertainty. Probabilistic modeling cannot handle situations with incomplete or little information on which to evaluate a probability, or when that information is nonspecific, ambiguous, or conflicting [1]. Many generalized models of uncertainty have been developed to treat such situation...

2012
Boris Faybishenko

Evaluation of evapotranspiration uncertainty is needed for proper decision-making in the fields of water resources and climatic predictions (Buttafuoco et al., 2010; Or and Hanks, 1992; Zhu et al., 2007). However, in spite of the recent progress in soil-water and climatic uncertainty quantification, using stochastic simulations, the estimates of potential (reference) evapotranspiration (Eo) and...

Journal: :international journal of hospital research 2013
amir afsharinia morteza bagherpour kambiz farahmand

background and objectives: evaluating the performance of clinical units is critical for effective managementof health settings. certain assessment of clinical variables for performance analysis is not always possible,calling for use of uncertainty theory. this study aimed to develop and evaluate an integrated independentcomponent analysis-fuzzy-data envelopment analysis approach to accurate the...

2017
Osama Abdel Raouf Ali Hassan Ibrahim M. Hezam

This paper investigated solving Fractional Programming Problems under Uncertainty (FPPU) using Sperm Motility Algorithm. Sperm Motility Algorithm (SMA) is a novel metaheuristic algorithm inspired by fertilization process in human, was proposed for solving optimization problems by Osama and Hezam [1]. The uncertainty in the Fractional Programming Problem (FPP) could be found in the objective fun...

2005
Zoran Majkic

We propose a parameterized framework based on a Heyting algebra and Lukasiewicz negation for modeling uncertainty for belief. We adopt a probability theory as mathematical formalism for manipulating uncertainty. An agent can express the uncertainty in her knowledge about a piece of information in the form of belief types: as a single probability, as an interval (lower and upper boundary for a p...

2005
Vikas Kumar Marta Schuhmacher

Until now, fuzzy logic has been extensively used to better analyse and design controllers for chemical processes. It has also been used for other applications like parameter estimation of nonlinear continuous-time systems but in general fuzzy logic has been intensively used for heuristics based system. Recently, fuzzy logic has been applied successfully in many areas where conventional model ba...

Journal: :journal of mining and environment 2016
m. najafi seyed m. e. jalali f. sereshki a. yarahmadi bafghi

performing a probabilistic study rather than a determinist one is a relatively easy way to quantify the uncertainty in an engineering design. due to the complexity and poor accuracy of the statistical moment methods, the monte carlo simulation (mcs) method is wildly used in an engineering design. in this work, an mcs-based reliability analysis was carried out for the stability of the chain pill...

2008
A. K. Verma A. Srividya M. V. Bhatkar

Usually probabilistic methods are used in the conventional reliability assessment of power system. From an applied point of view, dealing with uncertainties of some parameters such as mean time to failure or repair and forecasted load, using probabilistic methods would be difficult; because acquisition of adequate historical data related to different parts of system to extract an appropriate pr...

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