IEEE WCCI: Complex-Valued Neural Networks

IEEE World Congress on Computational Intelligence

International Joint Conference on Neural Networks (IJCNN-2008)

Hong Kong, June 1-6, 2008

Complex-Valued Neural Networks

(including Quaternion and Clifford Networks!)

Special Session


Akira Hirose

University of Tokyo, Japan

e-mail: ahirose at URL:

Jacek M. Zurada

University of Louisville, USA

e-mail: jacek.zurada at URL:

Igor Aizenberg

Texas A&M University-Texarkana, USA

e-mail: igor.aizenberg at URL:

Please, take a look at the Detailed Scope (below) of the Session

All guidelines and instructions for authors are given here

Important Dates:

December 15, 2007

December 1, 2007 Deadline for the paper submission

February 1, 2008 Notification of acceptance

March 1, 2008 Deadline for final paper submission

June 1-6, 2008 Conference, Technical and social programs

Special Session Scope


The Complex-Valued Neural Networks (CVNNs) is a quickly growing area that attracts more and more researchers. There is a line of the CVNN Special Sessions organized during last years, for example, at ICONIP 2002, Singapore, ICANN/ICONIP 2003, Istanbul, ICONIP 2004, Calcutta, WCCI-IJCNN 2006, Vancouver, “Fuzzy Days 2006”, Dortmund, ICANN 2007, Porto. Everywhere these sessions had large audience, which is growing continuously. There were many interesting presentations and very productive discussions.

There are several new directions in CVNNs development: from formal generalization of the commonly used algorithms to the complex-valued case that are mathematically beautiful to the use of original complex-valued activation functions that can increase significantly the neuron and network functionality. There are also many interesting applications of CVNNs in pattern recognition and classification, image processing, time series prediction, bioinformatics, robotics, etc.

One of the most important characteristics of the CVNNs is the proper treatment of amplitude and phase information, e.g., the treatment of wave-related rotation-related phenomena such as electromagnetism, light waves, quantum waves and oscillatory phenomena. Very interesting among other CVNNs are those networks that are based on neurons with the phase-dependent activation functions. This specific phenomenon makes it possible to increase the single neuron’s functionality and to design more flexible and more effective networks. It is also very interesting to study how these phenomena can be used in modeling of the biological neural networks.

2008 IEEE World Congress on Computational Intelligence WCCI 2008 in Hong Kong will be a very attractive forum, where it will be possible to organize a systematic and comprehensive exchange of ideas in the area, to present the recent research results and to discuss the future trends. We hope that the proposed session will attract not only the potential speakers, but many researches who can join the CVNNs community. We expect also that this session would be very beneficial for all CI researchers and other specialties that are in need of the sophisticated neural networks tools.

Papers that are, or might be, related to all aspects of the CVNNs are invited. We welcome contributions, where a fundamental theory is developed, as well as contributions, where different applied problems are considered. We also welcome potential contributions form other areas that are on the boarders of the proposed scope. Topics include, but are not limited to:

· Theoretical Aspects of CVNNs and Complex-Valued Activation Functions

· Complex-Valued Associative Memories

· Dynamics of Complex-Valued Neurons

· Learning Algorithms for CVCNNs

· Chaos in Complex Domain

· Feedforward CVCNNs

· Pattern Recognition, Classification and Time Series Prediction using CVCNNs

· Spatiotemporal CVNNs Processing

· Frequency Domain CVNNs Processing

· Phase-Sensitive Signal Processing

· Applications of CVNNs in Image Processing, Speech Processing and Bioinformatics

· Quantum Computation and Quantum Neural Networks

· CVNNs in Robotics

· Quaternion and Clifford Networks



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