نتایج جستجو برای: genetic algorithm artificial neural network

تعداد نتایج: 2159205  

This study was conducted to investigate the prediction of growth performance using linear regression and artificial neural network (ANN) in broiler chicken. Artificial neural networks (ANNs) are powerful tools for modeling systems in a wide range of applications. The ANN model with a back propagation algorithm successfully learned the relationship between the inputs of metabolizable energy (kca...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی عمران 1391

today, scouring is one of the important topics in the river and coastal engineering so that the most destruction in the bridges is occurred due to this phenomenon. whereas the bridges are assumed as the most important connecting structures in the communications roads in the country and their importance is doubled while floodwater, thus exact design and maintenance thereof is very crucial. f...

In this study, an artificial neural network was used to predict the minimum force required to single point incremental forming (SPIF) of thin sheets of Aluminium AA3003-O and calamine brass Cu67Zn33 alloy. Accordingly, the parameters for processing, i.e., step depth, the feed rate of the tool, spindle speed, wall angle, thickness of metal sheets and type of material were selected as input and t...

Due to lack of theory of elasticity, estimation of ultimate torsional strength of reinforcement concrete beams is a difficult task. Therefore, the finite element methods could be applied for determination of strength of concrete beams. Furthermore, for complicated, highly nonlinear and ambiguous status, artificial neural networks are appropriate tools for prediction of behavior of such states. ...

M.R. Hosseinzadeh Moghaddam S. Javad Mirabedini T. banirostam

    The article attempts to have neural network and genetic algorithm techniques present a model for classification on dataset. The goal is design model can the subject acted a firewall in network and this model with compound optimized algorithms create reliability and accuracy and reduce error rate couse of this is article use feedback neural network and compared to previous methods increase a...

Journal: :آب و خاک 0
حق وردی حق وردی محمدی محمدی محسنی موحد محسنی موحد قهرمان قهرمان افشار افشار

abstract soil salinity within plant root zone is one of the most important problems that cause reduction in yield in agricultural lands. in this research, salinity in soil profile was simulated in tabriz irrigation and drainage network using saltmod and artificial neural networks (anns) models. based on initial spatial distribution of salinity in soil profile, studying area was divided to 4 dif...

Journal: :middle east journal of cancer 0
shahram paydar trauma research center, shahid rajaee (emtiaz) trauma hospital, shiraz university of medical sciences, shiraz, iran saeedeh pourahmad department of biostatistics, shiraz university of medical sciences, shiraz, iran mohsen azad department of biostatistics, shiraz university of medical sciences, shiraz, iran shahram bolandparvaz trauma research center, shahid rajaee (emtiaz) trauma hospital, shiraz university of medical sciences, shiraz, iran reza taheri department of neurosurgery, shiraz university of medical sciences, shiraz, iran zahra ghahramani trauma research center, shahid rajaee (emtiaz) trauma hospital, shiraz university of medical sciences, shiraz, iran

background: clinically frank thyroid nodules are common and believed to be present in 4% to 10% of the adult population in the united states. in the current literature, fine needle aspiration biopsies are considered to be the milestone of a model which helps the physician decide whether a certain thyroid nodule needs a surgical approach or not. a considerable fact is that sensitivity and specif...

Journal: :international journal of environmental research 2012
kh. ashrafi m. shafiepour l. ghasemi b. araabi

the objective of this paper is to develop an artificial neural network (ann) model which can beused to predict temperature rise due to climate change in regional scale. in the present work data recorded overyears 1985-2008 have been used at training and testing steps for ann model. the multilayer perceptron(mlp) network architecture is used for this purpose. three applied optimization methods a...

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