Encontrados 25 documentos, a visualizar página 1 de 3
A novel approach to estimate wheel-rail contact forces considering wheel flats ...
Marques, Filipe; Magalhães, HugoThe vehicle-track interaction plays a role in railway dynamics, since the developed wheel-rail forces are responsible for supporting and guiding the vehicle. However, the existence of high wheel-rail contact forces or abnormal contact conditions typically leads to several surface degradation mechanisms like wheel flats. Hence, wheels and rails with defects on their contacting geometries tend to amplify the vehi...
Autonomous patrol of water resources in natural and artificial systems
Barros, F.M.; Pinho, Henrique J. O.; Magalhães, Hugo; Ferreira, Carlos; Matos, PedroWater resources, being one of the most important natural resources, face major threats due to contamination by pollutants of various types and origins. Consequently, preservation, protection and sustainable use of natural resources is increasingly important. The “DragonFly” project aims to develop a system that solves the need for monitoring the quality of surface water in natural and artificial systems of diff...
Railway dynamics with curved contact patch
Marques, Filipe; Magalhães, Hugo; Pombo, João; Ambrósio, Jorge; Flores, PauloThe wheel-rail contact modeling is of paramount importance for the dynamics of railway vehicles since it represents the interaction between the vehicle and the track. Although, in most cases, the contact generated occurs between convex surfaces which results in planar contact areas, the contact might take place in concave surfaces when negotiation sharp curves or due to the wear of profiles. In that cases, the ...
Kinship Analysis and Pedigree Reconstruction of a Natural Regenerated Cork Oak ...
Mendes, Bruna; Sampaio, Teresa; Antunes, Marta; Magalhães, Hugo; Costa e Silva, Filipe; Borges, Carla; Simões, Fernanda; Usié, AnaCork oak (Quercus suber L.) is a valuable forest species in the western Mediterranean Basin due to its ecological value and the production of cork (a renewable natural material). Cork quality depends on the genetic background and cork oak environment, which has long been recognized. As no cork oak genetic trials with pedigree information were available, the inference of the genetic relatedness between individua...
Kinship Analysis and Pedigree Reconstruction of a Natural Regenerated Cork Oak ...
Mendes, Bruna; Sampaio, Teresa; Antunes, Marta A.; Magalhães, Hugo; Silva, Filipe Costa; Borges, Carla; Simões, Fernanda; Usié, AnaCork oak (Quercus suber L.) is a valuable forest species in the western Mediterranean Basin due to its ecological value and the production of cork (a renewable natural material). Cork quality depends on the genetic background and cork oak environment, which has long been recognized. As no cork oak genetic trials with pedigree information were available, the inference of the genetic relatedness between individua...
Definition of a decision support model for calculating the economic production ...
Pereira, M. Teresa; Magalhães, Hugo; Ferreira, Fernanda A.; Barreiras, AlcindaThis paper proposes a Decision Support System (DSS) for Calculating the Economic Production Lot Size. The focus is on the analysis of improvement of manufacturing productivity in the packaging industry, specifically in a metal packaging company. Through combining different SKUs (Stock Keeping Units) in the same production order, as opposed to the current single SKU orders production paradigm of, it is possible ...
A novel methodology to automatically include general track flexibility in railw...
Neves Costa, João; Antunes, Pedro; Magalhães, Hugo; Pombo, João; Ambrosio, JorgeThe interaction between the rolling stock and the infrastructure plays a crucial role in railway vehicle dynamics. The standard approach consists of using a multibody formulation to model the railway vehicles running on simplified tracks. The track model can be rigid, if it comprises only a geometric description of the rail; semi-rigid, if it considers an elastic foundation underneath the rail; or a moving trac...
A finite element methodology to model flexible tracks with arbitrary geometry f...
Costa, J. N.; Antunes, Pedro; Magalhães, Hugo; Pombo, João; Ambrósio, J.The dynamic analysis of railway vehicles requires an accurate representation of the vehicle, the track geometry and structure, and their interaction. Generally, flexible track models with curved geometries represent the rails with straight beam elements, which results in a piecewise linear representation of the rails. Consequently, the wheel-rail contact mechanics are not properly captured, and the wheel-rail c...
Notas portuguesas sobre dois portugueses do século XV
Magalhães, Hugo.
Towards Fast Plume Source Estimation with a Mobile Robot
Magalhães, Hugo; Baptista, Rui; Macedo, Joã; Marques, LinoThe estimation of the parameters of an odour source is of high relevance for multiple applications, but it can be a slow and error prone process. This work proposes a fast particle filter-based method for source term estimation with a mobile robot. Two strategies are implemented in order to reduce the computational cost of the filter and increase its accuracy: firstly, the sampling process is adapted by the mob...