Performance analysis of multi-hop wireless packet networks.
Performance analysis of single server non-markovian retrial queue with working vacation and constant retrial policy
This paper analyses an M/G/1 retrial queue with working vacation and constant retrial policy. As soon as the system becomes empty, the server begins a working vacation. The server works with different service rates rather than completely stopping service during a vacation. We construct the mathematical model and derive the steady-state queue distribution of number of customer in the retrial group. The effects of various performance measures are derived.
Periodic coordination in hierarchical air defence systems
The subject of this work is the defence planning of a point target against an air attack. The defence system is decomposed into a number of sectors. A direct method of coordination is used at the upper level, while the sectors use a discrete-time event-based model and the description of uncertainty by multiple scenarios of an attack. The resulting problems are solved using linear programming. A comparison of two coordination strategies for realistic attack scenarios and an analysis of effectiveness...
Perishable inventory system with postponed demands and negative customers.
Perturbation des méthodes d'optimisation. Applications
Perturbation theory of duality in vector nonconvex optimization via the abstract duality scheme
Perturbation theory of duality in vector optimization via the abstract duality scheme
Perturbed iterative algorithms with errors for completely generalized strongly nonlinear implicit quasivariational inclusions.
Perturbed optimization problems in Banach spaces
Pexider's equation and aggregation of allocations.
Pickup and delivery problem with split demand and transfers
We deal with a logistic problem motivated by a case study from a company dealing with inland transportation of piece goods in regular cycles. The problem consists in transportation of goods among regional centres – hubs of a network. Demands on transportation are contained in a matrix of flows of goods between pairs of hubs. The transport is performed by vehicles covering the shipping demands and the task is to design a cyclical route and to place a depot for each vehicle. The route depot can be...
Piecewise affine selections for piecewise polyhedral multifunctions and metric projections.
Piece-wise optimal control in transport allocation problem
Piecewise-polynomial signal segmentation using convex optimization
A method is presented for segmenting one-dimensional signal whose independent segments are modeled as polynomials, and which is corrupted by additive noise. The method is based on sparse modeling, the main part is formulated as a convex optimization problem and is solved by a proximal splitting algorithm. We perform experiments on simulated and real data and show that the method is capable of reliably finding breakpoints in the signal, but requires careful tuning of the regularization parameters...
Placement de tâches dans un système distribué et dualité lagrangienne
Planfin -- a decision support system for bond portofolio selection.
Planificación multinivel con limitaciones de capacidad.
Este trabajo estudia el problema de la planificación de la producción en sistemas de fabricación multinivel, con un cuello de botella. El problema se ha abordado mediante una aproximación heurística, resolviendo el problema resultante empleando el método primal dual. El trabajo incluye un algoritmo para la selección sucesiva de los precios de los recursos que garanticen una mejora monótona hacia la solución óptima.
Planification à moyen terme de la production d'un satellite défilant et ensembles stables
Planification des emplois du temps et de la formation au sein d'une grande entreprise
Planification des Emplois du Temps et de la Formation au Sein d'une Grande Entreprise
We describe an O.R. technique which plans the allotment of time of the collaborators of a big company. The proposed method not only considers the immediate profitability of the company, but also the training of the collaborators in order to guarantee the success of the company's rising generation. The proposed method uses a greedy approach and constitutes therefore a simple and fast tool for decision makers. It has been successfully implemented in an important Swiss bank society.