Πλοήγηση ανά Συγγραφέα "Liberopoulos, G."
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Mixed integer parametric bilevel programming for optimal strategic bidding of energy producers in day-ahead electricity markets with indivisibilities
Kozanidis, G.; Kostarelou, E.; Andrianesis, P.; Liberopoulos, G. (2013)We address the problem of finding the optimal bidding strategy of an energy producer that participates in a single-period day-ahead electricity market, assuming full knowledge of the market's parameters. The problem is ... -
Modeling and solution approach for the environmental traveling salesman problem
Saharidis, G. K. D.; Kolomvos, G.; Liberopoulos, G. (2014)We consider the environmental traveling salesman problem in a connected graph driven by a cost function describing the impact of environmental externalities over the routes. The resulting problem is the asymmetric non-Euclidean ... -
Numerical investigation of optimal policies for production flow control and set-up scheduling: lessons from two-part-type failure-prone FMSs
Liberopoulos, G.; Caramanis, M. (1997)The optimal set-up change and production control policy for a failure-prone machine to meet constant demand rates for two part-types is obtained numerically. Computational experience is reported for several instances of ... -
On the design of electricity auctions with non-convexities and make-whole payments
Andrianesis, P.; Liberopoulos, G. (2013)Electricity markets that allow the generation units to submit multi-part bids and take into account the technical characteristics of these units are characterized by non-convexities. Such market designs, when operated under ... -
On the tradeoff between optimal order-base-stock levels and demand lead-times
Liberopoulos, G. (2008)We investigate the tradeoff between finished-goods inventory and advance demand information for a model of a single-stage make-to-stock supplier who uses an order-base-stock replenishment policy to meet customer orders ... -
An overview of Greece's wholesale electricity market with emphasis on ancillary services
Andrianesis, P.; Biskas, P.; Liberopoulos, G. (2011)Greece's wholesale electricity market is a mandatory pool in which the commodities of energy and ancillary services are simultaneously traded and dispatched on the generation units. In this paper, we provide an overview ... -
Performance evaluation of an automatic transfer line with WIP scrapping during long failures
Liberopoulos, G.; Kozanidis, G.; Tsarouhas, P. (2007)We develop a model of a failure-prone, bufferless, paced, automatic transfer line in which material flows through a number of workstations in series, receiving continuous processing along each workstation. When a workstation ... -
Production capacity modeling of alternative, nonidentical, flexible machines
Liberopoulos, G. (2002)Analyzing the production capacity of a flexible manufacturing system consisting of a number of alternative, nonidentical, flexible machines, where each machine is capable of producing several different part types simultaneously ... -
Production scheduling of a multi-grade PET resin plant
Liberopoulos, G.; Kozanidis, G.; Hatzikonstantinou, O. (2010)We present a discrete-time, Mixed Integer Linear Programming (MILP) model for the production scheduling of a continuous-process multi-grade PET resin plant. The objective is to minimize the cost associated with grade ... -
A recovery mechanism with loss-related profits in a day-ahead electricity market with non-convexities
Andrianesis, P.; Liberopoulos, G.; Kozanidis, G.; Papalexopoulos, A. D. (2011)In wholesale electricity markets, unit commitment costs and capacity constraints create non-convexities which may bring about losses to some of the participating generation units. To keep the losing units in the market, a ... -
Recovery mechanisms in a joint energy/reserve day-ahead electricity market with non-convexities
Andrianesis, P.; Liberopoulos, G.; Kozanidis, G.; Papalexopoulos, A. D. (2010)The goal of this paper is to evaluate the incentive compatibility of several cost- and bid-based recovery mechanisms that may be implemented in a wholesale electricity market to make the generation units whole in the ... -
Recovery Mechanisms in Day-Ahead Electricity Markets With Non-Convexities-Part I: Design and Evaluation Methodology
Andrianesis, P.; Liberopoulos, G.; Kozanidis, G.; Papalexopoulos, A. D. (2013)In centralized day-ahead electricity markets with marginal pricing, unit commitment costs and capacity constraints give rise to non-convexities which may result in losses to some of the participating generating units. ... -
Recovery Mechanisms in Day-Ahead Electricity Markets With Non-Convexities-Part II: Implementation and Numerical Evaluation
Andrianesis, P.; Liberopoulos, G.; Kozanidis, G.; Papalexopoulos, A. D. (2013)In centralized day-ahead electricity markets with marginal pricing, unit commitment costs and capacity constraints give rise to non-convexities which may result in losses to some of the participating generating units. To ... -
Reliability analysis of an automated pizza production line
Liberopoulos, G.; Tsarouhas, P. (2005)We present a statistical analysis of failure data of an automated pizza production line covering a period of four years. The analysis includes the computation of the most important descriptive statistics of the failure ... -
Revenue-adequate pricing mechanisms in non-convex electricity markets: A comparative study
Andrianesis, P.; Liberopoulos, G. (2014)Electricity market designs that allow multi-part bids and consider the technical characteristics of the generation units are characterized by non-convexities. Such market designs, when operated under marginal pricing, may ... -
Special issue: Stochastic models of production-inventory systems, part I - Preface
Liberopoulos, G.; Tan, B.; Gershwin, S. B.; Papadopoulos, C. T.; Smith, J. M. (2004) -
Special issue: Stochastic models of production-inventory systems, part II - Preface
Liberopoulos, G.; Tan, B.; Gershwin, S. B.; Papadopoulos, C. T.; Smith, J. M. (2004) -
The stochastic economic lot sizing problem for non-stop multi-grade production with sequence-restricted setup changeovers
Liberopoulos, G.; Pandelis, D. G.; Hatzikonstantinou, O. (2013)We study a variant of the stochastic economic lot scheduling problem (SELSP) encountered in process industries, in which a single production facility must produce several different grades of a family of products to meet ... -
Stochastic modeling of manufacturing systems: Advances in design, performance evaluation, and control issues
Liberopoulos, G.; Papadopoulos, C. T.; Tan, B.; MacGregor Smith, J.; Gershwin, S. B. (2006)Manufacturing systems rarely perform exactly as expected and predicted. Unexpected events, such as order changes, equipment failures and product defects, affect the performance of the system and complicate decision-making. ... -
Stochastic models for the design, coordination, and control of manufacturing systems
Liberopoulos, G.; Papadopoulos, C. T.; Tan, B.; Smith, J. M.; Gershwin, S. B. (2005)