Feedforward Neural Network Methodology (Springer Series in by Terrence L. Fine PDF

By Terrence L. Fine

ISBN-10: 0387226494

ISBN-13: 9780387226491

ISBN-10: 0387987452

ISBN-13: 9780387987453

This decade has visible an explosive development in computational velocity and reminiscence and a fast enrichment in our figuring out of synthetic neural networks. those components offer structures engineers and statisticians having the ability to construct versions of actual, monetary, and information-based time sequence and indications. This ebook presents an intensive and coherent creation to the mathematical houses of feedforward neural networks and to the in depth technique which has enabled their hugely winning software to advanced difficulties.

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Extra resources for Feedforward Neural Network Methodology (Springer Series in Statistics)

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Perceptrons—Networks with a Single Node n: 2n : D(n, 2): D(n, 3): D(n, 4): 2 4 4 4 4 3 8 8 8 8 4 16 14 16 16 5 32 22 30 32 6 64 32 52 62 7 128 44 84 114 8 256 58 128 198 So long as D(n, d) < 2n , we cannot train a perceptron to learn all training sets. Observe that even for n = 4(5)(6) a perceptron can no longer learn all training sets in IR2 (IR3 )(IR4 ). From Appendix 1 we learn that d k=0 n k n d ] if n ≥ 2d. [1 + n + 1 − 2d d < Combining this result with Eq. 4 yields the useful upper bound D(n, d) < 2 n−1 d ] if n ≥ 2d.

198] ) Either there exists w ˜ satisfying Eq. 2 for F˜ or there exists k k, x ˜ i1 , . . , x ˜ ik , λi ≥ 0, k λj = 1, j=1 λj x ˜ ij = 0. 3) j=1 In the latter case the convex combination need not be taken over more than k ≤ d + 1 terms when the vectors are in IRd . In other words, either there is a hyperplane separating the vectors in F˜ from the origin 0 or the origin can be produced by a convex combination of such vectors. If there is a solution to the system of equalities in Eq. 3), then the two sets cannot be linearly separated or learned by a perceptron without error.

If we can find two hyperplanes w, τ−1 and w, τ1 , differing only in their threshold values, with |τ1 − τ−1 | > δ, such that µ1 ({x : w · x ≥ τ1 }) = µ−1 ({x : w · x ≤ τ−1 }) = 1, then we are assured that no matter which random samples are generated they will be linearly separable in a time upper bounded by a multiple of 1/δ 2 . However, in general, the two probabilistic models or statistical hypotheses generating the two classes will overlap. In this case, the randomly generated training set T will fail to be linearly separable, with probability converging to one, as its size n increases.

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Feedforward Neural Network Methodology (Springer Series in Statistics) by Terrence L. Fine

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