A5090462439- Landslides and related hazards
- Nonlinear Dynamics and Pattern Formation
- Chaos control and synchronization
- Neural Networks Stability and Synchronization
- Cryospheric studies and observations
- Remote Sensing and LiDAR Applications
- Computational Physics and Python Applications
- Complex Network Analysis Techniques
- COVID-19 epidemiological studies
- Hydrology and Watershed Management Studies
- Forest ecology and management
- Computational and Text Analysis Methods
- Cellular Automata and Applications
- Chaos-based Image/Signal Encryption
- Remote-Sensing Image Classification
- Soil erosion and sediment transport
- Wind Energy Research and Development
- Flood Risk Assessment and Management
- stochastic dynamics and bifurcation
- Groundwater flow and contamination studies
- COVID-19 Pandemic Impacts
- Solar Radiation and Photovoltaics
- Tree Root and Stability Studies
- Neural Networks and Applications
- Smart Agriculture and AI
Universidade Federal da Fronteira Sul
2014-2023
Gheorghe Asachi Technical University of Iași
2020
Instituto Tecnológico de Aeronáutica
2009-2014
Universidade Regional do Noroeste do Estado do Rio Grande do Sul
2008
This work concerns analytical results on the role of coupling strength in phenomenon onset complete frequency locking power-grids modelled as a network second-order Kuramoto oscillators. Those allow estimation for and to assess features oscillators that favor synchronization. The are evaluated using an order parameter defined normalized sum absolute values phase deviations over time. investigation synchronization within subsets space involved problem is also carried out. It shown good...
The severe acute respiratory syndrome of coronavirus 2 spread globally very quickly, causing great concern at the international level due to severity associated disease, so-called COVID-19. Considering Rio de Janeiro city (Brazil) as an example, first diagnosis this disease occurred in March 2020, but exact moment when local virus started is uncertain Brazilian epidemiological surveillance system was not widely prepared detect suspected cases COVID-19 that time. Improvements over pandemic,...
This paper studies the problem of isochronal synchronization time-delay chaotic systems featuring also coupling delay. Based on Lyapunov–Krasovskii stability theory, sufficient conditions are derived for between a pair identical systems. Such criteria permit proper design stable proportional linear feedback controller, more specifically, adequate gain matrices. The proposed suited to with (i) intrinsic delay, (ii) delay or (iii) both. Numerical simulations delay-coupled presented as examples...
The rapid spread of COVID-19 has demanded a quick response from governments in terms planning contingency efforts that include the imposition social isolation measures and an unprecedented increase availability medical services. Both courses action have been shown to be critical success epidemic control. Under this scenario, timely adoption effective strategies allows outbreak decelerated at early stages. objective study is present model specially tailored for epidemics, aimed allowing...
We present a new framework to the formulation of problem isochronal synchronization for networks delay-coupled oscillators. Using linear transformation change coordinates network state vector, this method allows straightforward definition error system, which is critical step in problem. The then solved on basis Lyapunov-Krasovskii theorem. Following approach, we show how system can be defined such that its dimension same as (or smaller than) vector.
Recent studies suggest that power-grids experience a dynamical equilibrium named self-organized criticality as they evolve by their own means to critical state in which minor event can trigger chain reaction affecting any number of elements. Considering the topologicalmodel Eletrosul transmission system and simplified model cascading failures, we study size/scope blackouts relatively proximity its operational limits. Results indicate size scope are strongly related overall ofthe at moment an...