Download Artificial Neural Networks - ICANN 2008: 18th International by Anton Andrejko, Mária Bieliková (auth.), Véra Kůrková, Roman PDF

By Anton Andrejko, Mária Bieliková (auth.), Véra Kůrková, Roman Neruda, Jan Koutník (eds.)

This quantity set LNCS 5163 and LNCS 5164 constitutes the refereed complaints of the 18th overseas convention on man made Neural Networks, ICANN 2008, held in Prague Czech Republic, in September 2008.

The two hundred revised complete papers offered have been conscientiously reviewed and chosen from greater than three hundred submissions. the second one quantity is dedicated to development attractiveness and knowledge research, and embedded platforms, computational neuroscience, connectionistic cognitive technological know-how, neuroinformatics and neural dynamics. it additionally includes papers from certain classes coupling, synchronies, and firing styles: from cognition to sickness, and positive neural networks and workshops new traits in self-organization and optimization of man-made neural networks, and adaptive mechanisms of the perception-action cycle.

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Additional info for Artificial Neural Networks - ICANN 2008: 18th International Conference, Prague, Czech Republic, September 3-6, 2008, Proceedings, Part II

Example text

The specialized training solution was developed to avoid the problem of training generic inverse models. These models were considered not to be goal directed since they were trained in a situation different from the one where they would be used in a control loop. Although solving the goal directed problem this solution creates another one: the error obtained here is ey (k) which reports to the output of the loop, but the error needed to train the inverse model should be eu (k). To propagate the output error to the input it is necessary to know the Hessian or Jacobian matrices of the system (depending on the training algorithm used).

Meyer In this paper we will focus instead on model-based strategies to select highly relevant features and will show that a cross-validated assessment of the relevance can both outperform wrappers and improve existing filters approaches. g. by cross-validation) (iii) the choice of the best feature subset according to the assessment. Note that the second step is particularly demanding in microarray classification tasks because of the high ratio between the dimensionality of the problem and the number of measured samples.

This is motivated by the fact that the combination of two unbiased and independent estimators is still an unbiased but lower variance estimator [13]. We obtain then two aggregated estimators ˆ CV ˆD ˆ = Rs + Rs , R s 2 ˆ CV ˆ MRMR ˆ = Rs + Rs R s 2 (9) Note that less trivial combination mechanisms [20] could be adopted, if we had access to the variance of the two estimates in (9). On the basis of the quantitites defined in (9) we can define two novel feature selection algorithms: the algorithm R’ where the selected subset is sR = arg max s⊂x,|s|≤d ˆ R s (10) and the algorithm R” where the selected subset is sR = arg max s⊂x,|s|≤d ˆ R s (11) A Model-Based Relevance Estimation Approach 4 27 Experiments The experimental session aims to show: 1) the improvement in classification accuracy with respect to a conventional wrapper approach when the selection is done according to the strategy R’ (Equation (10)) 2) the improvement in classification accuracy with respect to a filter approach like MRMR when the selection is done according to the strategy R”(Equation 11).

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