Tobias Grosche's Computational intelligence in integrated airline scheduling PDF

By Tobias Grosche

ISBN-10: 3540898867

ISBN-13: 9783540898863

ISBN-10: 3540898875

ISBN-13: 9783540898870

An airline time table represents the crucial making plans section of every one airline. mostly, the target of airline agenda optimization is to discover the airline agenda that maximizes working revenue. This making plans activity is not just crucial but additionally the main advanced job an airline is faced with. previously, this activity is played through dividing the general making plans challenge into smaller and no more advanced subproblems which are solved individually in a chain. even though, this strategy is barely of juvenile power to house interdependencies among the subproblems, leading to much less ecocnomic schedules than these being attainable with an technique fixing the airline time table optimization challenge in a single step. during this paintings, making plans techniques for built-in airline scheduling are offered. One process follows the conventional sequential technique: present versions from literature for person subproblems are applied and more advantageous in an total iterative regimen permitting to build airline schedules from scratch. the opposite making plans appraoch represents a really simultaneous airline scheduling: utilizing metaheuristics, airline schedules are processed and optimized right now with out a separation into diverse optimization steps for its subproblems.

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Frazão The data stored in the school PC is transferred, hourly, via HTTP, to a data server located in the Centre for Intelligent Systems, in the University of Algarve. This data server stores all the data and makes it available for the users via a WEB interface. This interface enables the user to select the relevant sensors, the time duration of the readings and the data format. A more detailed description of the remote data acquisition system can be found in [16]. 3 RBF Neural Network Overview RBF neural networks (RBFNNs) are composed of three functionally distinct layers.

If the number of model inputs is restricted to the interval [2, 30] and the number of neurons (n) to the interval [3,10], the number of possible model combinations is in the order of 5 E18! As it is not feasible to fully explore such a model space, a sub-optimal solution is obtained through the use of genetic algorithms. A Genetic Algorithm (GA) is an evolutionary computing approach in which a population-based search is performed by employing operators such as selection, crossover and mutation.

The MOGA (master) resides in one PC and the remaining (slaves) iteratively fetch models in order to train, evaluate, and return the results to the master. Fig. 8. Distributed data-based MOGA architecture In order to adequately and promptly analyse the results after one run of the algorithm, a large amount of data, in the order of some Gigabytes, has to be stored in a very structured way. To facilitate the storing and retrieval of information about the models a databased solution was pursued. Using a Relational DataBase Management System (RDBMS) a database composed of only a few tables was developed in order to store and manage all the results from one MOGA execution.

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Computational intelligence in integrated airline scheduling by Tobias Grosche

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