Browsing by Subject "Aprenentatge automàtic -- Algorismes"
Now showing items 1-19 of 19
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A defuzzification based new algorithm for the design of Mamdani-type fuzzy controllers
(Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2000)
Article
Open AccessThis paper presents a new learning algorithm for the design of Mamdani-type or fully-linguistic fuzzy controllers based on available input-output data. It relies on the use of a previously introduced parametrized defuzzification ... -
A multistrategy approach for digital text
(Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2005)
Article
Open AccessThe goal of the research described here is to develop a multistrategy classifier system that can be used for document categorization. The system automatically discovers classification patterns by applying several empirical ... -
A post-processing strategy for SVM learning from unbalanced data
(2011)
Conference lecture
Open AccessStandard learning algorithms may perform poorly when learning from unbalanced datasets. Based on the Fisher’s discriminant analysis, a post-processing strategy is introduced to deal datasets with significant imbalance ... -
Adaptive scheduling on power-aware managed data-centers using machine learning
(IEEE Computer Society Publications, 2011)
Conference report
Restricted access - publisher's policyEnergy-related costs have become one of the major economic factors in IT data-centers, and companies and the research community are currently working on new efficient power-aware resource management strategies, also known ... -
Anàlisi dels sistemes electorals i estudi dels resultats de les eleccions catalanes ala darrera dècada mitjançant Intel·ligència Artificial
(Universitat Politècnica de Catalunya, 2021-06-21)
Bachelor thesis
Open AccessEns trobem en un moment de la història on les democràcies estan evolucionant, i degut a la hiperconectivitat i globalització, s’estan replantejant molts models d’elecció dels nostres representants polítics, també coneguts ... -
Comparison of active learning methods for automatic document classification
(Universitat Politècnica de Catalunya, 2018-06-21)
Master thesis
Open AccessGetting correctly labelled data is an important preliminary stage for many supervisedmachine learning problems, but it can also be really difficult to perform. Sometimes, toobtain a good model, it could require tens or ... -
Detección de transiciones posturales basado en un acelerómetro y un sensor de presión mediante algoritmos de aprendizaje automático
(Universitat Politècnica de Catalunya, 2019-01-31)
Master thesis
Restricted access - author's decision[CASTELLÀ] Los sensores inerciales basados en Sistemas Micro Electro Mecánicos, gracias a su reducido tamaño y bajo consumo de energía, han permitido el desarrollo de sistemas portables orientados al reconocimiento de ... -
Evolutionaty training for dynamical recurrent neural networks: an application in finantial time series prediction
(Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2006)
Article
Open AccessTheoretical and experimental studies have shown that traditional training algorithms for Dynamical Recurrent Neural Networks may suffer of local optima solutions, due to the error propagation across the recurrence. In the ... -
Handling binary classification problems with a priority class by using Support Vector Machines
(2017-12-01)
Article
Open Access© 2017 Elsevier B.V. A post-processing technique for Support Vector Machine (SVM) algorithms for binary classification problems is introduced in order to obtain adequate accuracy on a priority class (labelled as a positive ... -
Horn query learning with multiple refinement
(2008)
Article
Restricted access - publisher's policyIn this paper we try to understand the heuristics that underlie the decisions made by the Horn query learning algorithm proposed in [1]. We take advantage of our explicit representation of such heuristics in order to ... -
Improvement to the cooperative rules methodology by using the ant colony system algorithm
(Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2001)
Article
Open AccessThe cooperative rules (COR) methodology [2] is based on a combinatorial search of cooperative rules performed over a set of previously generated candidate rule consequents. It obtains accurate models preserving the highest ... -
Machine learning aplicat a prediccions durant la nit electoral
(Universitat Politècnica de Catalunya, 2016-10)
Master thesis (pre-Bologna period)
Open AccessThe current project explores electoral data from Spanish national elections from 2000 to 2011. Using these, it is developed and tested an algorithm to predict election results with a small error. The analysed prediction ... -
Máquinas de soporte vectorial sobre conjuntos de datos no balanceados: propuesta de un nuevo sesgo
(2012-09)
Research report
Open AccessEn el aprendizaje con conjuntos de datos no balanceados, la máquina de soporte vectorial (SVM) puede exhibir un bajo rendimiento sobre la clase minoritaria ya que, como otras máquinas de aprendizaje, están diseñadas para ... -
Modificación del sesgo de una SVM entrenada sobre clases no balanceadas
(Universidad de Sevilla, 2011)
Conference report
Open AccessEn el área de aprendizaje automático, uno de los problemas que se presenta es el relacionado con las clases no balanceadas. Esto ocurre cuando en el conjunto de datos se dispone de muchos ejemplos de una clase, pero ... -
Restricted Boltzmann machine vectors for speaker clustering and tracking tasks in TV broadcast shows
(Multidisciplinary Digital Publishing Institute, 2019-07-09)
Article
Open AccessRestricted Boltzmann Machines (RBMs) have shown success in both the front-end and backend of speaker verification systems. In this paper, we propose applying RBMs to the front-end for the tasks of speaker clustering and ... -
Sensor sintètic
(Universitat Politècnica de Catalunya, 2020-01-31)
Bachelor thesis
Restricted access - confidentiality agreement -
Study of different machine learning approaches for identification of fake news articles
(Universitat Politècnica de Catalunya, 2019-10-08)
Master thesis
Open AccessIn this document multiple machine learning approaches, including Supervised, Semi-supervised and Unsupervised learning are explored with the objective of finding the best algorithm for the task of identifying fake news. ... -
Using genetic feature selection for optimizing user profiles
(Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2000)
Article
Open AccessMost of the techniques used in text classification are determined by the occurrences of the words (terms) appearing in the documents, combined with the user feedback over the documents retrieved. However, in our model, ... -
Video Object Segmentation by Tracking Structured Key Points and Contours
(Universitat Politècnica de Catalunya, 2016-08)
Master thesis
Open Access
Covenantee: Eidgenössische Technische Hochschule ZürichIn this thesis, we tackle the problem of video object segmentation where we have to classify every pixel of every frame in a video sequence into background and foreground classes. Our algorithms fall in the semi-supervised ...
