Home Bioinformatics • Complex-Valued Neural Networks by Akira Hirose (auth.) PDF

Complex-Valued Neural Networks by Akira Hirose (auth.) PDF

By Akira Hirose (auth.)

ISBN-10: 3642276318

ISBN-13: 9783642276316

ISBN-10: 3642276326

ISBN-13: 9783642276323

This booklet is the second one enlarged and revised version of the 1st winning monograph on complex-valued neural networks (CVNNs) released in 2006, which lends itself to graduate and undergraduate classes in electric engineering, informatics, regulate engineering, mechanics, robotics, bioengineering, and different appropriate fields.

In the second one version the hot developments in CVNNs study are integrated, leading to e.g. nearly a doubled variety of references. The parametron invented in 1954 is additionally pointed out with dialogue on analogy and disparity. additionally quite a few extra arguments at the merits of the complex-valued neural networks bettering the variation to real-valued neural networks are given in a variety of sections.

The e-book turns out to be useful for these starting their experiences, for example, in adaptive sign processing for hugely useful sensing and imaging, keep an eye on in unknown and altering atmosphere, robotics encouraged by way of human neural structures, and brain-like info processing, in addition to interdisciplinary reviews to achieve cozy society. it's also worthy to those that perform learn and improvement relating to new services and products at businesses. the writer wrote this publication hoping particularly that it presents the readers with significant tricks to make strong use of neural networks in absolutely functional purposes. The booklet emphasizes uncomplicated rules and methods of pondering. Why can we have to contemplate neural networks that take care of advanced numbers? What benefits do the complex-valued neural networks have? what's the foundation of the benefits? In what parts do they strengthen significant purposes? This booklet solutions those questions through describing information and examples, to be able to motivate the readers with new rules.

The publication comes in handy for these starting their stories, for example, in adaptive sign processing for hugely sensible sensing and imaging, keep watch over in unknown and altering surroundings, robotics encouraged by means of human neural structures, and brain-like details processing, in addition to interdisciplinary reports to achieve cozy society. it's also valuable to those that perform learn and improvement concerning new services and products at businesses. the writer wrote this booklet hoping particularly that it presents the readers with significant tricks to make sturdy use of neural networks in totally functional functions. The e-book emphasizes uncomplicated principles and methods of pondering. Why will we have to think of neural networks that take care of advanced numbers? What benefits do the complex-valued neural networks have? what's the beginning of the benefits? In what components do they boost significant functions? This ebook solutions those questions via describing information and examples, in an effort to motivate the readers with new principles.

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Extra info for Complex-Valued Neural Networks

Example text

This effect emerges also in the Euclidean metric to some extent. However, the Euclidean metric is related only to the cosine component as shown in Fig. 12(a’) and (b’), resulting in a partial treatment of phase directions. The evaluation results can be different from (a) and (b). The complex inner-product metric is then more sensitive to signal coherence and, therefore, enhances the distinction among various objects compared with the case of Euclidean metric described below. 4 Metric in Complex Domain 37 In addition, the complex inner product is inherently less sensitive to the norm of signal vectors.

The definition as the ordered pair of real numbers is algebraic, and can be stricter than the intuitive rotation interpretation. At the same time, the fact that a complex number is defined by two real numbers may lead present-day neural-network researchers to consider a complex network equivalent in essence to just a real-number network that has double real input terminals and real double output neurons. However, it is not true. We can clarify the merit by focusing on the rotational function even with this definition.

For simplicity of expression, we consider one of the output signals zs out of zs . 31) where τ is learning time constant in time t domain. Various pairs of input zt and output zs teacher signals are presented to the network for the training. 32) where K is a real constant. 34) where j and N are imaginary unit and the input terminal number. 35) The real and imaginary parts mix with each other. 38) 38 3 Complex-Valued Neural Networks: Distinctive Features The product yields the phase difference as well as the amplitude product, which is compatible with the signal circularity.

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