Search results for "Opera"
showing 10 items of 8665 documents
Algunos problemas de rutas por arcos
2014
En esta tesis se estudian tres problemas de rutas por arcos muy importantes tanto a nivel práctico como teórico. Se tratan del General de Rutas por Arcos en un grafo dirigido (Directed General Routing Problem, DGRP), su caso particular, el problema de la Grúa (Stacker Crane Problem, SCP) y el problema del Cartero Rural Generalizado en un grafo dirigido (Generalized Directed Rural Postman Problem, GDRPP). El primer problema estudiado es problema de la Grúa el cual se define en un grafo mixto G=(V,E,A), donde cada arista o arco, (i,j), tiene un coste asociado cij > 0, y tiene como objetivo hallar una ruta de coste mínimo que recorra al menos una vez cada arco del grafo. El problema General de…
Fundamentos de Optimización Matemática en Economía
1999
La optimización matemática es un área dentro de las matemáticas que se encarga de la elección de la mejor alternativa de entre las posibles para un problema formulado en términos matemáticos. Este área de las matemáticas es muy amplia, debido a la diversidad de situaciones que se pueden plantear y a las distintas maneras de enfocar la resolución del problema. El presente texto, en la medida que pretende ser una herramienta para el análisis económico, se centra en la programación no lineal y en los métodos analíticos de resolución de esos problemas. Por tanto, el objetivo es proporcionar al lector los conocimientos básicos y avanzados de optimización matemática que destacan por su aplicabili…
Surrogate-assisted multicriteria optimization: Complexities, prospective solutions, and business case
2017
Complexity in solving real-world multicriteria optimization problems often stems from the fact that complex, expensive, and/or time-consuming simulation tools or physical experiments are used to evaluate solutions to a problem. In such settings, it is common to use efficient computational models, often known as surrogates or metamodels, to approximate the outcome (objective or constraint function value) of a simulation or physical experiment. The presence of multiple objective functions poses an additional layer of complexity for surrogate-assisted optimization. For example, complexities may relate to the appropriate selection of metamodels for the individual objective functions, extensive …
A cookbook for hungry teachers : suggestopedy and cooperative learning in practising oral skills : a material package
2008
Stakeholder relations in the regional state administration : case Central Finland Regional Environment Centre
2010
Dyadic relations between the main contractor and its suppliers : a case study to clarify critical factors in Metso Paper Ltd
2015
Botulinum Toxin A for Oral Cavity Cancer Patients: In Microsurgical Patients BTX Injections in Major Salivary Glands Temporarily Reduce Salivary Prod…
2012
Abstract: In patients suffering from oral cavity cancer surgical treatment is complex because it is necessary to remove carcinoma and lymph node metastasis (through a radical unilateral or bilateral neck dissection) and to reconstruct the affected area by means of free flaps. The saliva stagnation in the post-operative period is a risk factor with regard to local complications. Minor complications related to saliva stagnation (such as tissue maceration and wound dehiscence) could become major complications compromising the surgery or the reconstructive outcome. In fact the formation of oro-cutaneous fistula may cause infection, failure of the free flap, or the patient’s death with carotid b…
Quantitative Approximation Properties for the Fractional Heat Equation
2017
In this note we analyse \emph{quantitative} approximation properties of a certain class of \emph{nonlocal} equations: Viewing the fractional heat equation as a model problem, which involves both \emph{local} and \emph{nonlocal} pseudodifferential operators, we study quantitative approximation properties of solutions to it. First, relying on Runge type arguments, we give an alternative proof of certain \emph{qualitative} approximation results from \cite{DSV16}. Using propagation of smallness arguments, we then provide bounds on the \emph{cost} of approximate controllability and thus quantify the approximation properties of solutions to the fractional heat equation. Finally, we discuss genera…
Equivalence of viscosity and weak solutions for the normalized $p(x)$-Laplacian
2018
We show that viscosity solutions to the normalized $p(x)$-Laplace equation coincide with distributional weak solutions to the strong $p(x)$-Laplace equation when $p$ is Lipschitz and $\inf p>1$. This yields $C^{1,\alpha}$ regularity for the viscosity solutions of the normalized $p(x)$-Laplace equation. As an additional application, we prove a Rad\'o-type removability theorem.
The linearized Calderón problem for polyharmonic operators
2023
In this article we consider a linearized Calderón problem for polyharmonic operators of order 2m (m ≥ 2) in the spirit of Calderón’s original work [7]. We give a uniqueness result for determining coefficients of order ≤ 2m − 1 up to gauge, based on inverting momentum ray transforms. peerReviewed