Predictive risk estimation for the Expectation Maximization algorithm with Poisson data [PDF]
, 2020 In this work, we introduce a novel estimator of the predictive risk with Poisson data, when the loss function is the Kullback-Leibler divergence, in order to define a regularization parameter's choice rule for the Expectation Maximization (EM) algorithm.
arxiv +1 more source
Building a Smart EM Environment -- AI-Enhanced Aperiodic Micro-Scale Design of Passive EM Skins [PDF]
, 2021 An innovative process for the design of static passive smart skins (SPSSs) is proposed to take into account, within the synthesis, the electromagnetic (EM) interactions due to their finite (macro-level) size and aperiodic (micro-scale) layouts. Such an approach leverages on the combination of an inverse source (IS) formulation, to define the SPSS ...
arxiv +1 more source
Multi-Objective System-by-Design for mm-Wave Automotive Radar Antennas [PDF]
, 2022 The computationally-efficient solution of multi-objective optimization problems (MOPs) arising in the design of modern electromagnetic (EM) microwave devices is addressed. Towards this end, a novel System-by-Design (SbD) method is developed to effectively explore the solution space and to provide the decision maker with a set of optimal trade-off ...
arxiv +1 more source
Planning of EM Skins for Improved Quality-of-Service in Urban Areas [PDF]
, 2021 The optimal planning of electromagnetic skins (EMSs) installed on the building facades to enhance the received signal strength, thus the wireless coverage and/or the quality-of-service (QoS) in large-scale urban areas, is addressed. More specifically, a novel instance of the System-by-Design (SbD) paradigm is proposed towards the implementation of a ...
arxiv +1 more source
Towards Real-World Indoor Smart Electromagnetic Environments -- A Large-Scale Experimental Demonstration [PDF]
, 2023 To the best of the authors' knowledge, this work presents the first large-scale indoor experimental assessment of an implementation of the emerging Smart ElectroMagnetic Environment (SEME) paradigm, which is based on the deployment of static-passive EM skins (SP-EMSs) to enhance the coverage in a 5 [GHz] Wi-Fi network. Unlike standard (laboratory-based)
arxiv +1 more source
Holographic Smart EM Skins for Advanced Beam Power Shaping in Next Generation Wireless Environments [PDF]
arXiv, 2021 An innovative approach for the synthesis of inexpensive holographic smart electromagnetic (EM) skins with advanced beamforming features is proposed. The complex multiscale smart skin design is formulated within the Generalized Sheet Transition Condition (GSTC) framework as a combination of a mask-constrained isophoric inverse source problem and a micro-
arxiv
Reconfigurable and Static EM Skins on Vehicles for Localization [PDF]
arXiv, 2023 Electromagnetic skins (EMSs) have been recently considered as a booster for wireless sensing, but their usage on mobile targets is relatively novel and could be of interest when the target reflectivity can/must be increased to improve its detection or the estimation of parameters. In particular, when illuminated by a wide-bandwidth signal (e.g., from a
arxiv
Path of infectious diseases in Brazil in the last 50 years: an ongoing challenge [PDF]
, 2016 In this article, we comment on the main features of infectious diseases in Brazil in the last 50 years, highlighting how much of this path Revista de Saúde Pública could portray.
Sato, Ana Paula Sayuri +1 more
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Memory-Enhanced Dynamic Evolutionary Control of Reconfigurable Intelligent Surfaces [PDF]
arXiv, 2023 An innovative evolutionary method for the dynamic control of reconfigurable intelligent surfaces (RISs) is proposed. It leverages, on the one hand, on the exploration capabilities of evolutionary strategies and their effectiveness in dealing with large-scale discrete optimization problems and, on the other hand, on the implementation of memory-enhanced
arxiv
Recognizing the vocabulary of Brazilian popular newspapers with a free-access computational dictionary [PDF]
Alfa Revista de Linguistica, 2019, 63 (1), pp.67-85, 2019 We report an experiment to check the identification of a set of words in popular written Portuguese with two versions of a computational dictionary of Brazilian Portuguese, DELAF PB 2004 and DELAF PB 2015. This dictionary is freely available for use in linguistic analyses of Brazilian Portuguese and other researches, which justifies critical study. The
arxiv +1 more source