RSS 1.0Departamento de Matemática
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Nonlinear Dynamics, Chaos and Control of the Hindmarsh-Rose Neuron Model
; Chavarette, Fábio Roberto
(Boletim da Sociedade Paranaense de Matematica, 2022) [Artigo]
Mathematics has changed over time to comprise interdisciplinary fields of research, and consid- ering this, biomathematics has arisen as an interface study. In this work, we analyze the dynamical behavior of the Hindmarsh-Rose ... -
Analysis of the Influence of Contamination in Lubricant by Biodiesel in a Pin-On-Disk Equipment
; Gonçalves, Aparecido Carlos; Da Consolação Fonseca de Albuquerque, Maria ; Chavarette, Fábio Roberto ; ; De Almeida, Estevão Fusaro (Materials Research, 2022) [Artigo]
The introduction of biodiesel to commercial diesel is being increased every year. The need to check this addition to the engine and lubricant is important for automakers and internal combustion engine manufacturers. The ... -
Design, construction and evaluation of a device for the manufacture of ferrogram for analytical ferrography
; Gonçalves, Aparecido Carlos; Ribeiro, Victor Hugo ; Chavarette, Fábio Roberto ; (Lubrication Science, 2022) [Artigo]
The dynamism of the reliability of machines and equipment has the objective of availability, leading to the development of several techniques of predictive maintenance, to define the ideal point for the intervention. Among ... -
Reliability analysis using experimental statistical methods and ais: Application in continuous flow tubes of gaseous medium
; Chavarette, Fábio Roberto; Gonçalves, Aparecido Carlos ; ; ; Panosso, Alan Rodrigo ; (Acta Scientiarum - Technology, 2021) [Artigo]
The motivation for the development of this work arose from the observation of maintenance in pressure vessels, which are categorized as highly hazardous security risk products. The costs of detecting failures in the ... -
Robust static output feedback <i>H</i><sub></sub> control for uncertain Takagi-Sugeno fuzzy systems
(IEEE Transactions on Fuzzy Systems, 2022) [Artigo]In this work, a robust static output feedback (SOF) design for continuous-time nonlinear systems under norm bounded uncertainties, described as a Takagi-Sugeno (TS) system is proposed. The key features are that a switching ... -
Regulated functions with values in the Banach algebra of quaternions
(Proceedings of the World Congress on Engineering 2011, WCE 2011, 2011) [Trabalho apresentado em evento]In this paper we deal with the notion of regulated functions with values in a Banach algebra A, we prove some results and present examples using quaternions. The physical meanning of this kind of functions is introduced ... -
Hyperbolic Geometrically Uniform Codes and Ungerboeck Partitioning on the Double Torus
; de Carvalho, Edson Donizete; ; ; (Symmetry, 2022) [Artigo]
Current research builds labelings for geometrically uniform codes on the double torus through tiling groups. At least one labeling group was provided for all of the 11 regular tessellations on the double torus, derived ... -
On the Frequencies for Structural Health Monitoring in Plates with Symmetrical Damage: An Analytical Approach
Lopes, Kayc W.; Gonsalez-Bueno, Camila G. ; Bueno, Douglas D. (Journal of Nondestructive Evaluation, 2022) [Artigo]
The damage detection process in structures has been an important challenge for the engineering community. The design of structural health monitoring (SHM) systems usually involves selection of actuators and sensors, their ... -
Burster reconstruction considering unmeasurable variables in the epileptor model
Brogin, João Angelo Ferres; ; Bueno, Douglas Domingues (Neural Computation, 2021) [Carta]
Epilepsy is one of the most common brain disorders worldwide, affecting millions of people every year. Although significant effort has been put into better understanding it and mitigating its effects, the conventional ... -
First-order nonlinear dynamic initial value problems
; ; dos Santos, Iguer Luis Domini (International Journal of Dynamical Systems and Differential Equations, 2021) [Artigo]
We prove three existence theorems for solutions of first-order dynamic initial value problems, including corresponding continuous and discrete cases. The main tools are fixed point theorems and dynamic inequalities. Two ... -
Classification of the coefficient of variation for experiments with eucalyptus seedlings in greenhouse1
; Faria, Glaucia Amorim; Maltoni, Katia Luciene ; Rocha, Paula Suares ; ; ; da Fonseca, Ariéli Daieny ; Felizardo, Lucas Menezes ; Costa, Carlos Alexandre Gomes (Revista Ciencia Agronomica, 2021) [Artigo]
In experimental statistics, the variability, which for conclusions related to experimental accuracy, is usually demonstrated by means of experimental coefficient of variation (CV). The aims of this study were to evaluate ... -
Variabilidade de atributos físicos e químicos para recuperação de um Argissolo Vermelho sob pastagem degradada no Cerrado
Barbieri, Rayner S.; Montanari, Rafael ; Teixeira Filho, Marcelo C.M. ; Panosso, Alan R. ; Lima, César G.R. (Espacios, 2017) [Artigo]
Brazilian pastures, for the most part, have been exploited using the natural fertility of the soils leaving them at some stage of degradation. The present work had the objective of evaluating the physical and chemical ... -
Using Mininet for emulation and prototyping Software-Defined Networks
; Schweitzer, Christiane Marie; Shinoda, Ailton Akira ; (2014 IEEE Colombian Conference on Communications and Computing, COLCOM 2014 - Conference Proceedings, 2014) [Trabalho apresentado em evento]
Software-Defined Networks (SDNs) represents an innovative approach in the area of computer networks, since they propose a new model to control forwarding and routing data packets that navigate the World Wide Web. Since ... -
Simulation in an SDN network scenario using the POX Controller
; Shinoda, Ailton Akira; Schweitzer, Christiane Marie ; (2014 IEEE Colombian Conference on Communications and Computing, COLCOM 2014 - Conference Proceedings, 2014) [Trabalho apresentado em evento]
Computer networks have evolved due to new trends in the society's needs since their emergence as a way of providing remote access and sharing of computational resources. The architecture inflexibility of the computer ... -
Integral functionals on c*-algebra of vector-valued regulated functions
Fernandes, L. A.O.; Arbach, R. (Annals of Functional Analysis, 2012) [Artigo]
In this paper we deal with the notion of regulated functions with values in a C*-algebra A and present examples using a special bi-dimensional C*-algebra of triangular matrices. We consider the Dushnik integral for these ... -
A multiobjective model for distribution system planning based on tabu search
Pereira, Benvindo Rodrigues; Mantovani, Jose Roberto Sanches ; Cossi, Antonio Marcos ; (2013 IEEE Grenoble Conference PowerTech, POWERTECH 2013, 2013) [Trabalho apresentado em evento]
This paper presents a multiobjective model for the multistage planning problem of a distribution system. The problem is formulated as a multiobjective mixed integer nonlinear programming model. The actions deemed in this ... -
On the dynamics behavior and a control design to a nonlinear 2-DOF vibrating gyroscopic-MEMS model
Peruzzi, Nelson José; Chavarette, Fábio Roberto ; Balthazar, José Manoel (Proceedings of the ASME Design Engineering Technical Conference, 2011) [Trabalho apresentado em evento]
In this paper, we deal with the nonlinear dynamics, the transfer of energy and control of the vibrations of a Micro Electro-mechanical System (MEMS) gyroscope. The MEMS are micro-transducers whose operation is based on ... -
Generalized heaviside functions in the Colombeau theory context
Villarreal, Francisco (Electronic Journal of Differential Equations, 2012) [Artigo]
We defined generalized Heaviside functions for a variable x in ℝ n, and for variables (x, t) in ℝ n × ℝ m. Then study properties such as: composition, invertibility, and association relation (the weak equality). This work ... -
Population dynamics of the horn fly (haematobia irritans) on guzera cattle breed and crossbred in selvíria, ms
De Almeida, Fabiana Alves; Basso, Fernanda Carvalho ; Seno, Maria Conceição Zocoller ; Filho, Walter Veriano Valério (Semina:Ciencias Agrarias, 2010) [Artigo]
Aiming to know the population dynamics of horn fly on cattle in the municipality of Selvíria, MS,Brazil, a study was conducted from March 2004 to June 2005 in the Education, Research and Extension Farm, from Unesp - Campus ... -
Nitrogênio no feijoeiro em sistema de plantio direto sobre gramíneas
; de Sá, Marco Eustáquio; Filho, Walter Veriano Valério (Acta Scientiarum - Agronomy, 2008) [Artigo]
An adequate supply of nitrogen is essential for high yield of common bean seeds; however, the responses to this nutrient in no-tillage systems can vary in function of the species and the amount of straw present. The aim ...