نتایج جستجو برای: manipulate1 artificial neural networks

تعداد نتایج: 834162  

Journal: Desert 2011
H. Afkhami M.T. Dastorani

In recent decades artificial neural networks (ANNs) have shown great ability in modeling and forecasting non-linear and non-stationary time series and in most of the cases especially in prediction of phenomena have showed very good performance. This paper presents the application of artificial neural networks to predict drought in Yazd meteorological station. In this research, different archite...

Journal: :desert 2015
mohammad tahmoures ali reza moghadamnia mohsen naghiloo

modeling of stream flow–suspended sediment relationship is one of the most studied topics in hydrology due to itsessential application to water resources management. recently, artificial intelligence has gained much popularity owing toits application in calibrating the nonlinear relationships inherent in the stream flow–suspended sediment relationship. thisstudy made us of adaptive neuro-fuzzy ...

اشرفی, فرزانه, اشرفی, مهدی, حمیدی بهشتی, محمد تقی, شهیدی, شهرزاد,

Background: Kidney transplantation had been evaluated in some researches in Iran mainly with clinical approach. In this research we evaluated graft survival in kidney recipients and factors impacting on survival rate. Artificial neural networks have a good ability in modeling complex relationships, so we used this ability to demonstrate a model for prediction of 5yr graft survival after ki...

Journal: :jundishapur journal of health sciences 0
maryam farhadian department of biostatistics, school of public health, hamadan university of medical sciences, hamadan, ir iran hossien mahjub mohsen aliabadi department of occupational health, school of public health, hamadan university of medical sciences, hamadan, ir iran saeed musavi department of biostatistics, school of public health, hamadan university of medical sciences, hamadan, ir iran mehdi jalali department of occupational health, school of public health, hamadan university of medical sciences, hamadan, ir iran

the work exposure conditions such as dust concentration, exposure time, use of respiratory protection devices and smoking status are effective to cause pulmonary function disorder. the objective of this study was prediction of pulmonary disorders in workers exposed to silica dust using artificial neural networks and logistic regression. a sample of 117 out of 150 workers employed in the stone c...

Journal: :journal of advances in computer research 0
firozeh razavi department of management and economics, science and research branch, islamic azad university, tehran, iran faramarz zabihi department of computer engineering, sari branch, islamic azad university, sari, iran mirsaeid hosseini shirvani department of computer engineering, sari branch, islamic azad university, sari, iran

neural network is one of the most widely used algorithms in the field of machine learning, on the other hand, neural network training is a complicated and important process. supervised learning needs to be organized to reach the goal as soon as possible. a supervised learning algorithm analyzes the training data and produces an inferred function, which can be used for mapping new examples.  hen...

Angelos P. Markopoulos Dimitrios E. Manolakos Sotirios Georgiopoulos

Various artificial neural networks types are examined and compared for the prediction of surface roughness in manufacturing technology. The aim of the study is to evaluate different kinds of neural networks and observe their performance and applicability on the same problem. More specifically, feed-forward artificial neural networks are trained with three different back propagation algorithms, ...

The artificial neural networks, the learning algorithms and mathematical models mimicking the information processing ability of human brain can be used non-linear and complex data. The aim of this study was to predict the breeding values for milk production trait in Iranian Holstein cows applying artificial neural networks. Data on 35167 Iranian Holstein cows recorded between 1998 to 2009 were ...

Journal: :پژوهش های حفاظت آب و خاک 0

infiltration rate is one of the most important soil physical parameters and is a basic input data in irrigation and drainage projects. although, a number of theoretical or experimental based equations are presented to describe this phenomenon but the evaluation of some new sciences such as artificial neural networks, for prediction of the phenomenon can be investigated. generally, the infiltrat...

Journal: :iranian journal of pharmaceutical research 0
seyed mohamad sadegh modaresi tarbiat moallem university mohammad ali faramarzi tehran university of medical sciences arash soltani tarbiat moallem university hadi baharifar tehran university of medical sciences amir amani tehran university of medical sciences

streptokinase is a potent fibrinolytic agent which is widely used in treatment of deep vein thrombosis (dvt), pulmonary embolism (pe) and acute myocardial infarction (mi). major limitation of this enzyme is its short biological half-life in the blood stream. our previous report showed that complexing streptokinase with chitosan could be a solution to overcome this limitation. the aim of this re...

Journal: :international journal of advanced design and manufacturing technology 0
aydin salimi university of peyame noor a. özdemir i. safarian

artificial neural network is one of the most robust and reliable methods in online prediction of nonlinear incidents in machining. tool flank wear as a tool life criterion is an important task which is needed to be predicted during machining processes to establish an online tool life estimation system. in this study, an artificial neural network model was developed to predict the tool wear and ...

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