Search results for "Operation"
showing 10 items of 2969 documents
Constrained control of a nonlinear two point boundary value problem, I
1994
In this paper we consider an optimal control problem for a nonlinear second order ordinary differential equation with integral constraints. A necessary optimality condition in form of the Pontryagin minimum principle is derived. The proof is based on McShane-variations of the optimal control, a thorough study of their behaviour in dependence of some denning parameters, a generalized Green formula for second order ordinary differential equations with measurable coefficients and certain tools of convex analysis.
Convex Duality in Stochastic Optimization and Mathematical Finance
2011
This paper proposes a general duality framework for the problem of minimizing a convex integral functional over a space of stochastic processes adapted to a given filtration. The framework unifies many well-known duality frameworks from operations research and mathematical finance. The unification allows the extension of some useful techniques from these two fields to a much wider class of problems. In particular, combining certain finite-dimensional techniques from convex analysis with measure theoretic techniques from mathematical finance, we are able to close the duality gap in some situations where traditional topological arguments fail.
The project scheduling polyhedron: Dimension, facets and lifting theorems
1993
Abstract The Project scheduling with resource constraints can be formulated as follows: given a graph G with node set N, a set H of directed arcs corresponding to precedence relations, and a set H′ of disjunctive arcs reflecting the resource incompatibilities, find among the subsets of H′ satisfying the resource constraints the set S that minimizes the longest path in graph (N, H ∪ S). We define the project scheduling polyhedron Qs as the convex hull of the feasible solutions. We investigate several classes of inequalities with respect to their facet-defining properties for the associated polyhedron. The dimension of Qs is calculated and several inequalities are shown to define facets. For …
Mediterranean systems of intermunicipal cooperation: the Valencian municipal associations and French communautés
2017
El presente artículo aborda desde una perspectiva valenciana la viabilidad de la cooperación entre municipios mediante el análisis de dos sistemas de asociacionismo intermunicipal: el valenciano y el francés. Para conocer cuáles son los elementos que llevan a la articulación de las asociaciones de municipios se hace un repaso sobre los puntos centrales del debate sobre la escala óptima para la prestación de servicios públicos y se recogen las principales tendencias en el contexto europeo, tanto en los diferentes estados como en los instrumentos de la Unión Europea. Partiendo de ello, se analizan el sistema valenciano de mancomunidades y la estructura de communautés francesas desde el punto …
Arts. 34-40 EIR
2016
The comments on Arts. 34-40 of EU Regulation 2015/848 deal with opening of secondary insolvency proceedings. These comments systematically tackle the prerequisites required for the opening of secondary insolvency proceedings, the relationship between main and secondary proceedings and the duties of cooperation that are put on the courts and the insolvency practitioners of both main and secondary proceedings. A particular attention is devoted to the introduction of the so-called “Undertaking to Avoid the Opening of Secondary Insolvency Proceedings” (Art. 36).
Comparison of different cooperation strategies in the prey-predator problem
2006
The paper describes two cooperating strategies among several homogeneous agents to reach a given target. In our case we used the prey-predators paradigm in which a set of agents (predators) have the purpose to reach a target (prey). The problem is addressed as an optimization problem that has been faced with two different algorithms (a genetic algorithm and a particle swam optimization algorithm). The two approaches are evaluated by using a simulator for each strategy and the results show that the strategies are very different in terms of prey-predator successes. Genetic algorithm can be used by the prey to solve at the best the problem to reach the lair, otherwise the Particle Swarm Optimi…
Cooperation and innovation in Italian agribusiness between theoretical analysis and empirical evidence
2022
The Covid-19 pandemic has affected all economic sectors. The agri-food sector has also suffered very clear effects, especially in those production contexts char-acterized by corporate atomization, lack of cooperation, and innovation. An agrifood system, characterized by low levels of innovation and dependence on foreign countries for many raw materials and foodstuffs, must necessarily recover margins of competitiveness if it is to reverse course. This study analyses the current production scenario of the Italian agri-food industry and suggests strategies to recover margins of competitiveness. The study reveals a weak agricultural sector, while the food industry and distribution are highly c…
Il modello della cooperazione
2004
Si articola il concetto di cooperazione all'interno della categoria generale della coordinazione, sviluppando gli orientamenti proposti da Bratman.
From ‘prisoner’s dilemma’ to reluctance to use judicial discretion: the enemies of cooperation in European cross-border cases – the situation of Ital…
2017
This text analysis both how Italian courts cooperated in European cross-border insolvency law cases, and how Regulation 848/2015 (Recast) could make cooperation in future cases smoother. Additional comments on the new prescriptions are also provided for.