نتایج جستجو برای: back propagation

تعداد نتایج: 256056  

Journal: :journal of agricultural science and technology 2010
s. r. hassan-beygi b. ghobadian r. amiri chayjan m. h. kianmehr

the use of neural networks methodology is not as common in the investigation and pre-diction noise as statistical analysis. the application of artificial neural networks for pre-diction of power tiller noise is set out in the present paper. the sound pressure signals for noise analysis were obtained in a field experiment using a 13-hp power tiller. during measurement and recording of the sound ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 1388

در طول نیم قرن گذشته و پیرو نظریات چامسکی ، بسیاری از زبان شناسان مکتب generative linguistics پذیرفته اند که آموزش گرامر زبان امری غریزی بوده ، به صورت قاعده فرا گرفته می شود و یک ماجول مجزا در مغز مسئول فراگیری آن است . یکی از حوزه های زبان که بیشتر از حوزه های دیگر توجه آنان را به خود جلب کرده سیستم پیچیده مربوط به ارجاع توسط ضمائر بوده است. از این پیچیدگی در بسیاری از بحث ها به عنوان نشانه ا...

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, ...

Journal: :iranian journal of applied animal science 2015
s. ghazanfari k. nobari m. tahmoorespur

artificial neural networks (ann) have shown to be a powerful tool for system modeling in a wide range of applications. the focus of this study is on neural network applications to data analysis in egg production. an ann model with two hidden layers, trained with a back propagation algorithm, successfully learned the relationship between the input (age of hen) and output (egg production) variabl...

Journal: :journal of agricultural science and technology 2015
i. golpour r. amiri chayjan j. amiri parian j. khazaei

the goal of this study was to predict the moisture content of paddy using machine vision and artificial neural networks (anns). the grains were dried as thin layer with air temperatures of 30, 40, 50, 60, 70, and 80°c and air velocities of 0.54, 1.18, 1.56, 2.48 and 3.27 ms-1. kinetics of l*a*b* were measured. the air temperature, air velocity, and l*a*b* values were used as ann inputs. the res...

Journal: :Journal of nonlinear and variational analysis 2023

1990
Hal McCartor

The Adaptive Solutions CN APS architecture chip is a general purpose neurocomputer chip. It has 64 processors, each with 4 K bytes of local memory, running at 25 megahertz. It is capable of implementing most current neural network algorithms with on chip learning. This paper discusses the implementation of the Back Propagation algorithm on an array of these chips and shows performance figures f...

Journal: :Complex Systems 1991
Wray L. Buntine Andreas S. Weigend

Connectionist feed-forward networks, t rained with backpropagat ion, can be used both for nonlinear regression and for (discrete one-of-C ) classification. This paper presents approximate Bayesian meth ods to statistical components of back-propagat ion: choosing a cost funct ion and penalty term (interpreted as a form of prior probability), pruning insignifican t weights, est imat ing the uncer...

2006
Ali Emrouznejad

Data Envelopment Analysis (DEA) is one of the most widely used methods in the measurement efficiency and productivity of Decision Making Units (DMUs). DEA for a large dataset with many inputs/outputs would require huge computer resources in terms of memory and CPU time. This paper introduces a neural network backpropagation Data Envelopment Analysis. Neural network requirements of computer memo...

Journal: :سنجش از دور و gis ایران 0
علی اکبر متکان دانشگاه شهید بهشتی علیرضا شکیبا دانشگاه شهید بهشتی امین حسینی اصل دانشگاه شهید بهشتی فردین رحیمی دهگلان دانشگاه شهید بهشتی

runoff is one of the major components of calculating water resource processes and is the main issue in hydrology. many concept models are used to predict the amount of runoff, which in most cases depend on topographical and hydrological data. conventional models are not appropriate for areas in which there is little hydrological data. changes in runoff are nonlinear, meaning it is time & space ...

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