نتایج جستجو برای: modeling

تعداد نتایج: 389510  

Journal: :iranian journal of management studies 2011
hamid shahbandarzadeh ahmad ghorbanpour

the main purpose of this paper is to present a fuzzy multi-criteria decision making (fmadm) model for appropriate location selection of a health center. therefore, we identify sixteen criteria and sub-criteria for selecting a health center location. these criteria and sub-criteria have been obtained from literature reviews and practical interviews. this paper proposes a method which combines th...

Journal: :journal of rehabilitation in civil engineering 2014
azadeh alsadat asghari zahra tabrizian morteza hossein ali beigy gholamreza ghodrati amiri bahram navayineya

. this paper presents the results of an experimental investigation on shear strength enhancement of reinforced concrete deep beams externally reinforced with fiber reinforced polymer (frp) composites. a total of six deep beam specimens of two different classes, as-built (unstrengthened) and retrofitted were tested in the experimental evaluation program. two composite systems namely carbon/epoxy...

Journal: :journal of biomedical physics and engineering 0
m abdi school of mechanical engineering, iran university of science and technology, tehran, iran 2tissue engineering and biolog m navidbakhsh school of mechanical engineering, iran university of science and technology, tehran, iran 2tissue engineering and biologسازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) a razmkon department of neurosurgery, shiraz university of medical sciences, shiraz, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences)

1024x768 normal 0 false false false en-us x-none ar-sa background and objective: numerical modeling of biological structures would be very helpful tool to analyze hundreds of human body phenomena and also diseases diagnosis. one physiologic phenomenon is blood circulatory system and heart hemodynamic performance that can be simulated by utilizing lumped method. in this study, we can predict hem...

Journal: :journal of structural engineering and geo-techniques 2012
o barani

buckle folds are common traps for hydrocarbon in several contractional provinces. buckle folds form where stratified sequences rest a top salt or some other utterly weak rock as a decollemet zone in units with high competency contrasts by a compressive stress which acted along the length of the rock layers. an important parameter affecting buckle folding of a competent zone above a mobile decol...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2010
saeid jamshidi ramin bozorgmehry boozarjomehry sayed mohmoud reza pishvaie

pore network modeling uses a network of pores connected by throats to model the void space of a porous medium and tries to predict its various characteristics during multiphase flow of various fluids. in most cases, a non-realistic regular lattice of pores is used to model the characteristics of a porous medium. although some methodologies for extracting geologically realistic irregular network...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2013
mayam abdoli rad akbar shahsavand

complex heat transfer phenomena (including unsteady state conduction, convection and solidification processes) occur in steel belt conveyer sulfur granulating method. numerical simulation of this technique is performed via a comprehensive and multifaceted one dimensional model. since the air situated between the adjacent sulfur pastilles is essentially stagnant, therefore, the surface temperatu...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2009
mahdi zaeifi yamchi majid abdouss hamid modarress

genetic programming (gp) is one of the computer algorithms in the family of evolutionary-computational methods, which have been shown to provide reliable solutions to complex optimization problems. the genetic programming under discussion in this work relies on tree-like building blocks, and thus supports process modeling with varying structure. in this paper the systems containing amino acids ...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2007
maryam sadi bahram dabir

a multi-objective optimization procedure has been developed to determine some kinetic parameters of free radical polymerization of vinyl acetate based on genetic algorithm. for this purpose, mathematical modeling of free radical polymerization of vinyl acetate is carried out first and then selected kinetic parameters are optimized by minimizing objective functions defined from comparing experim...

Journal: :international journal of hospital research 0
arezoo atighehchian department of management, faculty of administrative sciences and economics, university of isfahan, isfahan, iran. mohammad mehdi sepehri department of industrial engineering, tarbiat modares university, tehran. pejman shadpour hasheminejad kidney center, hospital management research center, iran university of medical sciences, tehran, iran.

background and objectives: operating room (or) scheduling is key to optimal operating room productivity. the significant uncertainty associated with surgery duration renders scheduling of surgical operation a challenging task. this paper proposes a novel computational stochastic model to optimize scheduling of surgeries with uncertain durations. the model considers various surgical operation co...

Journal: :تحقیقات مهندسی کشاورزی 0
علیرضا شکوهی استادیار دانشگاه بین المللی امام خمینی (ره) پیمان دانش کار آراسته استادیار دانشگاه بین المللی امام خمینی (ره)

the current study investigated and compared data generation methods for groundwater modeling. thesemethods can be divided into two classes; geostatistic and probabilistic. by comparing geostatistic methods,the best method was chosen and the hydraulic conductivity of the aquifer was generated for a study area ina grid (9-cell) format. after observing weak spatial correlation between the data, th...

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