نتایج جستجو برای: forward neural network

تعداد نتایج: 932348  

2014
D. P. Gaikwad Ravindra R Thool

Due to the rapid expansion and advancements of computer network, security has become a vital issue for modern computer network. The network intrusion detection systems play the vital role in protecting the computer networks. So, it has become a significant research issue. In spite of notable progress in intrusion detection system, there are still many opportunities to improve the existing syste...

This study investigates predictability, chaos analysis, wavelet decomposition and the performance of neural network models in forecasting the return series of the Tehran Stock Exchange Index (TEDPIX). For this purpose, the daily data from April 24, 2009 to May 3, 2012 is used. Results show that TEDPIX series is chaotic and predictable with nonlinear effect. Also, according to obtained inverse o...

Journal: :International Journal of Computer Applications 2015

Mansouri, H. Fattahi, M A. Ebrahimi Farsangi, S. Shojaee,

The excavation damaged zone (EDZ) can be defined as a rock zone where the rock properties and conditions have been changed due to the processes related to an excavation. This zone affects the behavior of rock mass surrounding the construction that reduces the stability and safety factor and increase probability of failure of the structure. In this paper, a methodology was examined for computing...

A. Ariapour M. Nassaji Zavareh

Evaporation is one of the most important components of hydrologic cycle.Accurate estimation of this parameter is used for studies such as water balance,irrigation system design, and water resource management. In order to estimate theevaporation, direct measurement methods or physical and empirical models can beused. Using direct methods require installing meteorological stations andinstruments ...

Journal: :تحقیقات اقتصادی 0
عبدالرسول قاسمی استادیار دانشکده ی اقتصاد دانشگاه علامه طباطبایی علی اصغر بانویی دانشیار دانشکده ی اقتصاد دانشگاه علامه طباطبایی فاطمه آقائی کارشناسی ارشد دانشکده اقتصاد دانشگاه علامه طباطبایی

forecasting of macroeconomic variables has specific importance in economic topics. indeed, different models are invented to forecast variables to help economic policy makers in adopting appropriate monetary and fiscal policies. in this paper, the performance of integrated model of input-output (io) and neural network is investigated in forecasting final demand and total production and the resul...

Journal: :advances in environmental technology 0
jamshid behin department of chemical engineering, faculty of engineering, razi university, kermanshah, iran negin farhadian department of chemical engineering, faculty of engineering, razi university, kermanshah, iran

in this work, response surface methodology (rsm) and artificial neural network (ann) were used to predict the decolorization efficiency of reactive red 33 (rr 33) by o3/uv process in a bubble column reactor. the effects of four independent variables including time (20-60 min), superficial gas velocity (0.06-0.18 cm/s), initial concentration of dye (50-150 ppm) and ph (3-11) were investigated us...

B. Rezai, B. Shahbazi, M. Noaparast, S. Chehreh Chelgani, S. M. J. Koleini,

Multivariable regression and artificial neural network procedures were used to modeling of the input power and gas holdup of flotation. The stepwise nonlinear equations have shown greater accuracy than linear ones where they can predict input power, and gas holdup with the correlation coefficients of 0.79 thereby 0.51 in the linear, and R2=0.88 versus 0.52 in the non linear, respectively. ...

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