نتایج جستجو برای: hybrid wavelet model neural network

تعداد نتایج: 2895647  

2016
Xiangdong Xu Xi Song Qian Wang Zhiyuan Liu Jing Wang Zhiru Li

Wind energy has been part of the fastest growing renewable energy sources that is clean and pollution-free, which has been increasingly gaining global attention, and wind speed forecasting plays a vital role in the wind energy field, however, it has been proven to be a challenging task owing to the effect of various meteorological factors. This paper proposes a hybrid forecasting model, which c...

Journal: :محیط شناسی 0
حمید زارع ابیانه دانشگاه بوعلی سینا ، استادیار گروه مهندسی آب دانشکدة کشاورزی مریم بیات ورکشی دانشگاه بوعلی سینا ، دانش آموخته کارشناسی ارشد آبیاری و زهکشی دانشکدة کشاورزی سمیرا اخوان دانشگاه بوعلی سینا، استادیار گروه مهندسی آب دانشکدة کشاورزی محمد محمدی دانشگاه بوعلی سینا، کارشناس آبیاری

information on nitrate in groundwater resources requires periodic measurements are accurate. despite the measure in some areas due to sensitive social and health community are not reported. therefore, be informed of the status of each area of water quality, modeling is essential. the purpose of this study was the application of artificial neural network method for estimating nitrate and compare...

2015
Junghwan Jin Jinsoo Kim Alejandro Raul Hernandez Montoya

Following the unconventional gas revolution, the forecasting of natural gas prices has become increasingly important because the association of these prices with those of crude oil has weakened. With this as motivation, we propose some modified hybrid models in which various combinations of the wavelet approximation, detail components, autoregressive integrated moving average, generalized autor...

Journal: :Int. J. General Systems 2007
Sunisa Amornwattana David Enke Cihan H. Dagli

The Black-Scholes model is the standard approach used for pricing financial options. However, although being theoretically strong, option prices valued by the model often differ from the prices observed in the financial markets. This paper applies a hybrid neural network which preprocesses financial input data for improving the estimation of option market prices. This model is comprised of two ...

Journal: :pollution 2015
ziba hosseini mohammad nakhaie

in this paper, we present an application of evolved neural networks using a real coded genetic algorithm for simulations of monthly groundwater levels in a coastal aquifer located in the shabestar plain, iran. after initializing the model with groundwater elevations observed at a given time, the developed hybrid genetic algorithm-back propagation (ga-bp) should be able to reproduce groundwater ...

In this paper, a novel hybrid method based on learning algorithmof fuzzy neural network and Newton-Cotesmethods with positive coefficient for the solution of linear Fredholm integro-differential equation of the second kindwith fuzzy initial value is presented. Here neural network isconsidered as a part of large field called neural computing orsoft computing. We propose alearning algorithm from ...

Predicting stock prices is complicated; various components, such as the general state of the economy, political events, and investor expectations, affect the stock market. The stock market is in fact a chaotic nonlinear system that depends on various political, economic and psychological factors. To overcome the limitations of traditional analysis techniques in predicting nonlinear patterns, ex...

2009
Xian-Bin Wen Hua Zhang Fayu Wang

This paper proposes a wavelet neural network (WNN) for SAR image segmentation by combining the wavelet transform and an artificial neural network. The WNN combines the multiscale analysis ability of the wavelet transform and the classification capability of the artificial neural network by setting the wavelet function as the transfer function of the neural network. Several SAR images are segmen...

2014
V. Alarcon-Aquino J. M. Ramirez-Cortes P. Gomez-Gil O. Starostenko Y. Garcia-Gonzalez

In this paper we report a novel application-based model as a suitable alternative for the classification and identification of attacks on a computer network, and thus guarantee its safety from HTTP protocol-based malicious commands. The proposed model is built on a self-recurrent neural network architecture based on wavelets with multidimensional radial wavelons, and is therefore suited to work...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید