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Differential STBC for OFDM based Wireless Systems
(Technische Universität Hamburg-Harburg, 2007)
Broadband wireless mobile data networks are an extremely important technical topic nowadays. These networks are probably the most convenient alternative for achieving the objective of providing and increasing connectivity ...
Combine-and-conquer: improving the diversity in similarity search through influence sampling
(Association for Computing Machinery - ACMUniversity of SalamancaSalamanca, 2015-04)
Result diversification methods are intended to retrieve elements similar to a given object whereas also enforcing a certain degree of diversity among them, aimed at improving the answer relevance. Most of the methods are ...
Selection and combination of unsupervised learning methods for image retrieval
(2017-06-19)
The evolution of technologies to store and share images has made imperative the need for methods to index and retrieve multimedia information based on visual content. The CBIR (Content-Based Image Retrieval) systems are ...
Have you met VikS? A novel framework for visual diversity search analysis
(Universidade Federal do Paraná - UFPRPontifícia Universidade Católica do Paraná - PUC-PRSociedade Brasileira de Computação - SBCCuritiba, 2014-10)
Searching images based on their pictorial content, or content-based image retrieval (CBIR), instead of using traditional tags and labeling attached to them has attracted considerable attention. However, this retrieval by ...
Data perturbation for outlier detection ensembles
(Association for Computing Machinery - ACMAalborg UniversityAalborg, 2014-06)
Outlier detection and ensemble learning are well established research directions in data mining yet the application of ensemble techniques to outlier detection has been rarely studied. Building an ensemble requires learning ...
Rank Aggregation for Pattern Classifier Selection in Remote Sensing Images
(Institute of Electrical and Electronics Engineers (IEEE), 2014-04-01)
In the past few years, segmentation and classification techniques have become a cornerstone of many successful remote sensing algorithms aiming at delineating geographic target objects. One common strategy relies on using ...
Uso de informação auxiliar em redes neurais e formação de comitês na identificação de sistemas dinâmicos
(Universidade Federal de Minas GeraisUFMG, 2013-03-01)
This work is dedicated to study two strategies for identification of nonlinear dynamical systems, specially, when available data are not representative. A procedure to incorporate auxiliary information during the training ...