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Mostrando ítems 61-70 de 115
Influência da filogenia em redes de interações ecológicas
(Universidade Federal do Rio Grande do NorteBRUFRNPrograma de Pós-Graduação em FísicaFísica da Matéria Condensada; Astrofísica e Cosmologia; Física da Ionosfera, 2013-05-23)
In this thesis we deal with a class of composed networks that are formed by two tree
networks, TP and TA, whose end points touches each other through a bipartite network
BPA. We explore this network using a functional ...
Ecuaciones diferenciales estocásticas conservativas sobre grafos: Distribución invariante y relación con la topología del grafo
(Medellín - Ciencias - MatemáticasDepartamento de MatemáticasFacultad de CienciasMedellínUniversidad Nacional de Colombia - Sede Medellín, 2019)
En este trabajo abordaremos las condiciones de necesidad y su ciencia para la existencia de una medida invariante para el proceso estocástico que da solución a la ecuación diferencial dX = LXdt + dY; X 2 Rn; donde Y = fY ...
Specialization in food production affects global food security and food systems sustainability
Understanding specialization patterns of countries in food production can provide relevant insights for the evaluation and design of policies seeking to achieve food security and sustainability, which are key to reach ...
Seleção de representantes para cobertura de componentes conexas em grafos
(Universidade Federal de Minas GeraisUFMG, 2018-12-17)
Based on the generalization of connectivity problems in ad hoc communication networks, widely studied in the literature, we introduce a new covering problem, called Componet Cover by Vertices (CCV). In this problem, we are ...
Interacciones mutualistas de frugivor?a y polinizaci?n mediadas por murci?lagos filost?midos en un fragmento de bosque seco tropical en Venadillo, Tolima
(Universidad del Tolima(CO COL 170), 2021)
Aninhamento em redes bipartidas
(Universidade Federal do Rio Grande do NorteBRUFRNPrograma de Pós-Graduação em FísicaFísica da Matéria Condensada; Astrofísica e Cosmologia; Física da Ionosfera, 2010-03-12)
We present a nestedness index that measures the nestedness pattern of bipartite networks, a problem that arises in theoretical ecology. Our measure is derived using the sum of distances of the occupied elements in the ...
GRASP/VND Optimization Algorithms for Hard Combinatorial Problems
(Udelar.FI, 2019)
Two hard combinatorial problems are addressed in this thesis. The first one is known as the ”Max CutClique”, a combinatorial problem introduced by P. Martins in 2012. Given a simple graph, the goal is to
find a clique C ...