230,197 research outputs found

    Forecasting of electricity prices in the Spanish electricity market using machine learning tools

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    The objective of this research assignment was to forecast electricity prices in the Spanish electricity market using three different machine learning techniques: k-nearest neighbours, support vector regression and artificial neural networks. The achieved results were compared and the quality of developed models was evaluated. The project was implemented in Python3.Incomin

    Neural Networks for Complex Data

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    Artificial neural networks are simple and efficient machine learning tools. Defined originally in the traditional setting of simple vector data, neural network models have evolved to address more and more difficulties of complex real world problems, ranging from time evolving data to sophisticated data structures such as graphs and functions. This paper summarizes advances on those themes from the last decade, with a focus on results obtained by members of the SAMM team of Universit\'e Paris

    Using deep learning for land classification within the konza prairie, 1985 – 2011

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    Machine learning has been around for decades, but deep learning is the new focus of study within machine learning. The goals of implementing deep learning into remote sensing are resulting in much faster and more accurate results for much larger datasets. The field of remote sensing has focused on increasing the accuracy of land classification. A possible solution for increasing accuracy is the use of convolutional neural networks. The goals of this study were to determine whether convolutional neural networks can be used on moderate-resolution imagery to accurately classify land. The study site of focus was the Konza Prairie in Geary County, Kansas. The image data are from Landsat 4 and 5 spanning the years 1985-2011. The Konza was split into 4 x 4-pixel size fishnet of cells that were classified as either burnt or non-burnt. To better examine the convolutional neural network, it was compared to machine learning and other neural network models. The machine learning models explored were logistic regression, k-nearest neighbor, decision tree, and linear support vector machine. The neural networks implemented included the basic neural network, shallow neural network, flatten time window neural network, convolutional neural network, and deep convolutional neural network. The results show that the k-nearest neighbor produce the highest overall accuracy compared to all the machine learning and neural networks but consist of high errors of omission proving that the classification is not represented accurately. The deep convolutional neural network has the best results for classifying burnt and non-burnt cells and low errors of omission and commission, which best represents the classification

    Using deep learning to classify community network traffic

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    Traffic classification is an important aspect of network management. This aspect improves the quality of service, traffic engineering, bandwidth management and internet security. Traffic classification methods continue to evolve due to the ever-changing dynamics of modern computer networks and the traffic they generate. Numerous studies on traffic classification make use of the Machine Learning (ML) and single Deep Learning (DL) models. ML classification models are effective to a certain degree. However, studies have shown they record low prediction and accuracy scores. In contrast, the proliferation of various deep learning techniques has recorded higher accuracy in traffic classification. The Deep Learning models have been successful in identifying encrypted network traffic. Furthermore, DL learns new features without the need to do much feature engineering compared to ML or Traditional methods. Traditional methods are inefficient in meeting the demands of ever-changing requirements of networks and network applications. Traditional methods are unfeasible and costly to maintain as they need constant updates to maintain their accuracy. In this study, we carry out a comparative analysis by adopting an ML model (Support Vector Machine) against the DL Models (Convolutional Neural Networks (CNN), Gated Recurrent Unit (GRU) and a hybrid model: CNNGRU to classify encrypted internet traffic collected from a community network. In this study, we performed a comparative analysis by adopting an ML model (Support vector machine). Machine against DL models (Convolutional Neural networks (CNN), Gated Recurrent Unit (GRU) and a hybrid model: CNNGRU) and to classify encrypted internet traffic that was collected from a community network. The results show that DL models tend to generalise better with the dataset in comparison to ML. Among the deep Learning models, the hybrid model outperformed all the other models in terms of accuracy score. However, the model that had the best accuracy rate was not necessarily the one that took the shortest time when it came to prediction speed considering that it was more complex. Support vector machines outperformed the deep learning models in terms of prediction speed
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