Download A statistical approach to neural networks for pattern by Robert A. Dunne PDF

By Robert A. Dunne

ISBN-10: 0471741086

ISBN-13: 9780471741084

An available and up to date remedy that includes the relationship among neural networks and records

A Statistical method of Neural Networks for development reputation provides a statistical remedy of the Multilayer Perceptron (MLP), that's the main time-honored of the neural community versions. This publication goals to respond to questions that come up while statisticians are first faced with this kind of version, reminiscent of:

How strong is the version to outliers?

may possibly the version be made extra strong?

Which issues may have a excessive leverage?

What are solid beginning values for the proper set of rules?

Thorough solutions to those questions and plenty of extra are incorporated, in addition to labored examples and chosen difficulties for the reader. Discussions at the use of MLP versions with spatial and spectral facts also are incorporated. additional remedy of hugely very important relevant features of the MLP are supplied, akin to the robustness of the version within the occasion of outlying or peculiar information; the impact and sensitivity curves of the MLP; why the MLP is a reasonably strong version; and adjustments to make the MLP extra powerful. the writer additionally presents explanation of a number of misconceptions which are familiar in present neural community literature.

through the publication, the MLP version is prolonged in different instructions to teach statistical modeling technique could make invaluable contributions, and additional exploration for becoming MLP types is made attainable through the R and S-PLUS® codes which are on hand at the book's comparable site. A Statistical method of Neural Networks for trend popularity effectively connects logistic regression and linear discriminant research, therefore making it a serious reference and self-study advisor for college students and execs alike within the fields of arithmetic, data, computing device technological know-how, and electric engineering.

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Extra resources for A statistical approach to neural networks for pattern recognition

Example text

In the attempt to obtain more reliable values some statisticians use the so-called ^-statistics, which take into account the sample size, rather than using the m^s directly. Thus s2 is the second ^-statistic. But the use of ^-statistics is essentially a correction to the mi values, dependent on n, and for large n's such as we should have to justify calculating a3 and #4 , the correction is quite slight. Hence we ignore it. 6. SUMMARY In this chapter we have been concerned with several objective measures for summarizing sample data, either discrete or continuous.

This does not tell us much, especially since in all cases YXy ~~ y) = 0 (except for round-off errors). Hence we must do something else to find a typical deviation from the mean. One solution is to neglect signs, and sum the absolute deviations | y — y |, then divide by n. This gives the "mean deviation'' y Iy _ yI mean deviation = —. 3. 32 cc , . 464 cc. Note that three of the deviations | y — y | exceed this value, and two are less. '' For it we square all of the deviations as in the last column of the table, and add.

3. 32 cc , . 464 cc. Note that three of the deviations | y — y | exceed this value, and two are less. '' For it we square all of the deviations as in the last column of the table, and add. 3280 cc2, by n = 5. Indeed, this used to be the common practice. However, for certain theoretical reasons, which appear in Chapter 7, the present practice is to divide X(V ~ y)2 by n — I instead of n. This gives what is called the "sample variance," its symbol being s2. sample variance = s2 = V (y _ y)2 —^— .

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