Jair A. L. Silva
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View article: Experimental evaluation of MIMO configurations in indoor visible light communications under the consideration of illumination
Experimental evaluation of MIMO configurations in indoor visible light communications under the consideration of illumination Open
Visible light communications (VLC) enable wireless data transmission using existing light-emitting diode (LED) illumination. This experimental study evaluates the performance of multiple input and multiple output (MIMO) configurations in i…
View article: AI-Driven Enhancements for Handover in Visible Light Communication Systems
AI-Driven Enhancements for Handover in Visible Light Communication Systems Open
A modified genetic algorithm (MGA) optimization procedure, alongside time series machine learning (ML) classifiers, is proposed to minimize handovers in a digital twin-based visible light communication (VLC) system. Frequent handovers have…
View article: Optimizing a machine learning design of dielectric properties in lead-free piezoelectric ceramics
Optimizing a machine learning design of dielectric properties in lead-free piezoelectric ceramics Open
Designing lead-free piezoelectric ceramics with tailored electrical properties remains a critical challenge for various applications. In this paper we present a novel methodology integrating Machine Learning (ML) and optimization procedure…
View article: Planning and resource allocation of a hybrid IoT network using artificial intelligence
Planning and resource allocation of a hybrid IoT network using artificial intelligence Open
This paper introduces a pioneering hybrid topology tailored for Internet of Things (IoT) applications, integrating mesh and star wireless sensor configurations. This hybridized approach aims to optimize energy consumption efficiency while …
View article: Optimizing a Machine Learning Design of Dielectric Properties in Lead-Free Piezoelectric Ceramics
Optimizing a Machine Learning Design of Dielectric Properties in Lead-Free Piezoelectric Ceramics Open
View article: Maximizing Sales and Customer Satisfaction in E-Commerce Through Ai-Driven Techniques
Maximizing Sales and Customer Satisfaction in E-Commerce Through Ai-Driven Techniques Open
View article: Maximizing Sales and Customer Satisfaction in E-Commerce Through Ai-Driven Techniques
Maximizing Sales and Customer Satisfaction in E-Commerce Through Ai-Driven Techniques Open
View article: Joint Interference and Power Minimization for Fault-Tolerant Topology in Sensor Networks
Joint Interference and Power Minimization for Fault-Tolerant Topology in Sensor Networks Open
Energy conservation is crucial in wireless ad hoc sensor network design to increase network lifetime. Since communication consumes a major part of the energy used by a sensor node, efficient communication is important. Topology control aim…
View article: Estratégia de um sistema de armazenamento de energia com Multiplas Usinas Virtuais de Energia
Estratégia de um sistema de armazenamento de energia com Multiplas Usinas Virtuais de Energia Open
View article: Machine Learning Method and Visible Light-Based Sensors for Multiinterface Level Measurement
Machine Learning Method and Visible Light-Based Sensors for Multiinterface Level Measurement Open
In this work, a feasible and low-cost approach is proposed for level measurement in multiphase systems inside tanks used for petroleum-derived oil production. The developed level sensor system consisted of light-emitting diodes (LEDs), lig…
View article: Planning an Integrated Stockyard–Port System for Smart Iron Ore Supply Chains via VND Optimization
Planning an Integrated Stockyard–Port System for Smart Iron Ore Supply Chains via VND Optimization Open
Stockyard–port planning is a complex combinatorial problem that has been studied primarily through simulation or optimization techniques. However, due to its classification as non-deterministic polynomial-time hard (NP-hard), the generatio…
View article: Music Segmentation and Similarity Estimation Applied to a Gaze-Controlled Musical Interface
Music Segmentation and Similarity Estimation Applied to a Gaze-Controlled Musical Interface Open
Assistive technology, especially gaze-controlled, can promote accessibility, health care, well-being and inclusion for impaired people, including musical activities that can be supported by interfaces controlled using eye tracking. Also, t…
View article: Comparing the Performance of OFDM and OCDM-based Visible Light Communications: Numerical and Experimental Analysis
Comparing the Performance of OFDM and OCDM-based Visible Light Communications: Numerical and Experimental Analysis Open
Numerical and experimental analysis of visible light communication (VLC) systems based on orthogonal chirp division multiplexing (OCDM) and orthogonal frequency division multiplexing (OFDM) are presented in this paper. Unlike most of the r…
View article: Optimizing Resources and Increasing the Coverage of Internet-of-Things (IoT) Networks: An Approach Based on LoRaWAN
Optimizing Resources and Increasing the Coverage of Internet-of-Things (IoT) Networks: An Approach Based on LoRaWAN Open
A resource optimization methodology is proposed for application in long range wide area networks (LoRaWANs). Using variable neighborhood search (VNS) and a minimum-cost spanning tree algorithm, it reduces the implementation and the mainten…
View article: Experimental Demonstration of Constant-Envelope OFDM to Reduce Intermodulation Impairments and Increase Robustness Against Fiber Nonlinearities
Experimental Demonstration of Constant-Envelope OFDM to Reduce Intermodulation Impairments and Increase Robustness Against Fiber Nonlinearities Open
Direct detection optical orthogonal frequency division multiplexing (DDO-OFDM) systems have been proposed as a well-suited solution for cost-sensitive applications, but also for metro/regional optical links. In this article, we experimenta…
View article: Planning and Resources Allocation of a Hybrid Iot Network Using Artificial Intelligence
Planning and Resources Allocation of a Hybrid Iot Network Using Artificial Intelligence Open
View article: A Manchester-OOK Visible Light Communication System for Patient Monitoring in Intensive Care Units
A Manchester-OOK Visible Light Communication System for Patient Monitoring in Intensive Care Units Open
Visible Light Communication (VLC) is an interesting solution in Intensive Care (IC) medical environments to, among others, prevent the spread of emerging diseases. This work presents the design of a low-cost and stable VLC transceiver syst…
View article: Experimental validation of a three‐dimensional modulation format for data transmission in RGB visible light communication systems
Experimental validation of a three‐dimensional modulation format for data transmission in RGB visible light communication systems Open
Transmission of three‐dimensional (3D) orthogonal frequency division multiplexing (OFDM) signals over red, green and blue (RGB) visible light communication (VLC) systems is proposed and experimentally validated. The novel 3D modulation for…
View article: Uma Generalizacao do Metodo de Reducao por Pesos
Uma Generalizacao do Metodo de Reducao por Pesos Open
Neste trabalho apresentamos uma generalização do método de redução por pesos proposto na literatura, o qual foi desenvolvido com base no método de von Neumann. Ambos métodos resolvem problemas de programação linear e têm como vantagens a s…
View article: Closed-Form Expression for BER of CE-OFDM in Optical Intensity-Modulated Direct-Detection Systems
Closed-Form Expression for BER of CE-OFDM in Optical Intensity-Modulated Direct-Detection Systems Open
A closed-form expression for the bit-error-rate (BER) of constant envelope orthogonal frequency division multiplexing (CE-OFDM) in intensity-modulated direct-detection optical systems is provided in this letter. To the best of our knowledg…
View article: Increasing the Spectral Efficiency of DDO-CE-OFDM Systems by Multi-Objective Optimization
Increasing the Spectral Efficiency of DDO-CE-OFDM Systems by Multi-Objective Optimization Open
A multi-objective optimization was implemented to increase the spectral efficiency of direct-detection optical orthogonal frequency division multiplexing (OFDM) systems with constant-envelope (CE) signals. Based on a genetic algorithm, the…
View article: Minimização de interferência com redução de potência em redes de sensores sem fio
Minimização de interferência com redução de potência em redes de sensores sem fio Open
metaheurística Variable Neighborhood Descent (VND) para reduzir o consumo de energia pela minimização da interferência durante a comunicação entre os nós sensores.
View article: Otimização de Recursos no fronthaul Óptico com Split-Funcional em 5G
Otimização de Recursos no fronthaul Óptico com Split-Funcional em 5G Open
View article: Planejamento de Sistemas Heterogêneos de Comunicações para Medições Smart Grids baseado em Algortimo Genético
Planejamento de Sistemas Heterogêneos de Comunicações para Medições Smart Grids baseado em Algortimo Genético Open
As redes inteligentes ou Smart Grids (SG) são redes elétricas dotadas de sistemas de comunicac ¸ão e automac ¸ão que proporcionam maior flexibilidade nas suas operac ¸ões.O planejamento das redes de medic ¸ão torna-se um processo complexo …
View article: A Comparison Among Simple Algorithms for Linear Programming
A Comparison Among Simple Algorithms for Linear Programming Open
This paper presents a comparison between a family of simple algorithms for linear programming and the optimal pair adjustment algorithm. The optimal pair adjustment algorithm improvements the convergence of von Neumann's algorithm which is…
View article: A Comparison Among Simple Algorithms for Linear Programming
A Comparison Among Simple Algorithms for Linear Programming Open
This paper presents a comparison between a family of simple algorithms for linear programming and the optimal pair adjustment algorithm. The optimal pair adjustment algorithm improvements the convergence of von Neumann’s algorithm which is…
View article: Simulating a Multi-Vehicle Traffic Sensing System Based on Radio Tomographic Imaging
Simulating a Multi-Vehicle Traffic Sensing System Based on Radio Tomographic Imaging Open
One of the most recently developed wireless technologies is Radio Tomographic Imaging (RTI). RTI employs a wireless sensor network that produces images of the change in the electromagnetic field of a monitored area using Received Signal St…
View article: The Smart Grid Concept in Oil & Gas Industries by a Field Trial of Data Communication in MV Power Lines
The Smart Grid Concept in Oil & Gas Industries by a Field Trial of Data Communication in MV Power Lines Open
Nowadays, communication and networking technologies are essential for Oil & Gas industries in order to guarantee reliability, safety and low costs in the producing process. Information access and commands and set-points transmission from/t…