نتایج جستجو برای: stochastic

تعداد نتایج: 125739  

Journal: :international journal of data envelopment analysis 2013
m. khodabakhshi h. kheirollahi

performance evaluation of universities is an important issue between researchers. classic data envelopment analysis (dea) models with deterministic data have been used by many authors to measure efficiency of universities in different countries. however, dea with stochastic data are, rarely used to measure efficiency of universities. in this paper, input oriented model in stochastic data envelo...

Journal: :journal of mathematical modeling 0
mehran namjoo school of mathematical sciences, vali-e-asr university of rafsanjan, rafsanjan, iran ali mohebbian school of mathematical sciences, vali-e-asr university of rafsanjan, rafsanjan, iran

in this paper, a high-order and conditionally stable stochastic difference scheme is proposed for the numerical solution of $rm ithat{o}$ stochastic advection diffusion equation with one dimensional white noise process. we applied a finite difference approximation of fourth-order for discretizing space spatial derivative of this equation. the main properties of deterministic difference schemes,...

Journal: :international journal of smart electrical engineering 2013
saber talari mahmoud reza haghifam ali akhavein

in this paper, a stochastic two-stage model is offered for optimization of the day-ahead scheduling of the microgrid. system uncertainties including dispatchable distributed generation and energy storage contingencies are considered in the stochastic model. for handling uncertainties, monte carlo simulation is employed for generation several scenarios and then a reduction method is used to d...

Journal: :journal of linear and topological algebra (jlta) 0
m alvand department of mathematical sciences, isfahan university of technology, isfahan, iran

it is known that a stochastic di erential equation (sde) induces two probabilisticobjects, namely a di usion process and a stochastic ow. while the di usion process isdetermined by the in nitesimal mean and variance given by the coecients of the sde,this is not the case for the stochastic ow induced by the sde. in order to characterize thestochastic ow uniquely the in nitesimal covariance give...

Journal: :the international journal of humanities 2014
mahdi bashiri aida omidvar reza tavakkoli-moghaddam

the hub location decision is a long term investment and any changes in it take considerable time and money. in real situations, some parameters are uncertain hence, deterministic models cannot be more efficient. the ability of two-stage stochastic programming is to make a long-term decision by considering effects of it in short term decisions simultaneously. in the two-stage stochastic programm...

Journal: :bulletin of the iranian mathematical society 2014
jun liu

the stochastic reaction diffusion systems may suffer sudden shocks‎, ‎in order to explain this phenomena‎, ‎we use markovian jumps to model stochastic reaction diffusion systems‎. ‎in this paper‎, ‎we are interested in almost sure exponential stability of stochastic reaction diffusion systems with markovian jumps‎. ‎under some reasonable conditions‎, ‎we show that the trivial solution of stocha...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی (نوشیروانی) بابل - پژوهشکده برق و کامپیوتر 1391

در این پایان نامه مفهوم اصلی فاکتورگراف شرح داده می شود و قوانین دیکدکننده ها که مبتنی بر الگوریتم جمع– ضرب می باشد بیان می شود. از الگوریتم جمع– ضرب برای دیکدکردن کد هایی که با استفاده از فاکتورگراف توصیف شده اند استفاده می شود. برای پیاده سازی دیکدکننده ها به صورت کاملاً دیجیتال از الگوریتم دیکدکردن تصادفی (stochastic decoding) که به صورت دیجیتال و تقریبی از الگوریتم جمع – ضرب می باشد استفاده ...

Journal: :international journal of nonlinear analysis and applications 2011
r. rezaeyan r. farnoush e. b. jamkhaneh

in this paper, we present an application of the stochastic calculusto the problem of modeling electrical networks. the filtering problem have animportant role in the theory of stochastic differential equations(sdes). in thisarticle, we present an application of the continuous kalman-bucy filter for a rlcircuit. the deterministic model of the circuit is replaced by a stochastic model byadding a ...

Journal: :ژورنال بین المللی پژوهش عملیاتی 0
m. khodabakhshi a. barani f. khodabakhshi k. moradian m. nemati goodarzi

performance evaluation of electricity distribution units is an important issue between researchers and regulators. classic data envelopment analysis models with deterministic data have been used by many authors to measure efficiency of power distribution units in different countries. however, data envelopment analysis with stochastic data are rarely used to measure efficiency of distribution co...

Journal: :bulletin of the iranian mathematical society 2016
e. salavati b. zangeneh

semilinear stochastic evolution equations with multiplicative l'evy noise are considered‎. ‎the drift term is assumed to be monotone nonlinear and with linear growth‎. ‎unlike other similar works‎, ‎we do not impose coercivity conditions on coefficients‎. ‎we establish the continuous dependence of the mild solution with respect to initial conditions and also on coefficients. ‎as corollaries of ...

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