# Andrzej Cichocki

Andrzej Cichocki (born 1947) is a Polish computer scientist, electrical engineer and a professor at the Systems Research Institute of Polish Academy of Science, Warsaw, and Nicolaus Copernicus University (UMK) in Toruń, Poland, and a visiting professor in several universities and research institutes, including Riken AIP, Japan and the Tokyo University of Agriculture and Technology. Andrzej Cichocki is among world’s top 1% most-cited researchers in the Web of Science (Clarivate) citation index and named on the annual Highly Cited Researchers 2021--2023 lists. He is one of the leading computer scientists and researchers working in areas of electrical and electronic engineering, affiliated with Poland.
He is most noted for his learning algorithms for Signal separation (BSS), Independent Component Analysis (ICA), Non-negative matrix factorization (NMF), tensor decomposition, Deep (Multilayer) Factorizations for ICA, NMF, neural networks for optimization problems and signal processing, Tensor network for Machine Learning and Big Data, and brain–computer interfaces. He is the author of several monographs/books and more than 800 scientific peer-reviewed articles.

## Education and career

Andrzej Cichocki received his M.Sc. (with honors), PhD and doctor of science (Dr.Sc.- Habilitation) degrees all in electrical engineering and computer science from the Warsaw University of Technology, Poland.
He received the title of full Professor in 1995.
From 1984 to 1989 he was a Alexander von Humboldt Research Fellow and DFG visiting scholar at the University of Erlangen Nurnberg, Germany and he worked closely with Professor Rolf Unbehauen.
From 1996 till 2018 he worked in RIKEN Brain Science Institute, Wako-shi, Japan at Shun'ichi Amari's Research Department, as a team leader and later as senior head of laboratories. He established and ran in RIKEN BSI three laboratories: Open Information Systems, Artificial Brains Systems and Cichocki's Laboratory for Advanced Brain Signal Processing.
In 2018-2022 he holds a distinguished visiting professorship at several universities including Hangzhou Dianzi University in Hangzhou, China and Tokyo University of Agriculture and Technology (TUAT), Tokyo, Japan.

### Research

Andrzej Cichocki has contributed extensively to several major interests of signal/image processing, machine learning and AI, including Independent Component Analysis (ICA), Non-negative matrix factorization (NMF) and artificial neural networks. He developed an efficient Hierarchical Alternating Least Squares (HALS) algorithm. He pioneered developing and applying new beta and alpha-beta and other divergences in machine learning, especially for non-negative matrix factorizations and nonnegative tensor decompositions. Moreover, he pioneered in development of multilayer (deep) matrix and tensor factorization models and learning algorithms, especially for ICA, NMF and Sparse Component Analysis (SCA). He developed and proposed new recurrent neural network architectures for optimization, solving large scale systems of algebraic equations and blind signal separation, especially multilayer (deep) hierarchical neural networks. He contributed to development of natural gradient algorithms for Independent Component Analysis (ICA) and blind deconvolution.
He proposed together with his co-workers several efficient AI models and machine learning algorithms for brain computer interface, human emotions recognition and early diagnosis of some brain diseases, like Alzheimer and Schizophrenia.
Following concerns raised by some AI experts about the potential risks that AGI may pose on humanity, Cichocki suggested in 2021 development of novel AGI systems with implemented multiple intelligences, including social/emotional intelligence, but also ethical/moral intelligence with self-awareness and responsible decision making abilities.
His current research interests include:
* Tensor decomposition and tensor networks
* Learning of non-stationarity data
* Data fusion of multi-modal structured data, and deep neural networks compression
* Applications: EEG, NIRS, ECoG, EMG, Brain Computer Interfaces, computational neuroscience, computer vision.
* Time series forecasting and analysis
* Online portfolio selection (OLPS)
* Exponentiated gradient and natural gradient learning algorithms for various applications
* Artificial General Intelligence (AGI) with multiple intelligences.

## Books

* Cichocki, Andrzej, & Unbehauen, Rolf (1993). Neural Networks for Optimization and Signal Processing. John Wiley & Sons, Inc.. ISBN 978-0-471-93010-5,doi:10.1002/acs.4480080309
* Cichocki, A., & Amari, S. I. (2002). Adaptive Blind Signal and Image Processing: Learning Algorithms and Applications. John Wiley & Sons. ISBN 9780470845899, doi:10.1002/0470845899
* Cichocki, A., Zdunek, R., Phan, A. H., & Amari, S. I. (2009). Nonnegative Matrix and Tensor Factorizations: Applications to Exploratory Multi-way Data Analysis and Blind Source Separation. John Wiley & Sons. ISBN 9780470747278, doi:10.1002/9780470747278
* Cichocki, A., Lee, N., Oseledets, I., Phan, A. H., Zhao, Q., & Mandic, D. P. (2016). Tensor Networks for Dimensionality Reduction and Large-Scale Optimization: Part 1 Low-Rank Tensor Decompositions. Foundations and Trends® in Machine Learning, 9(4-5), 249-429. doi:10.1561/2200000059
* Cichocki, A., Phan, A. H., Zhao, Q., Lee, N., Oseledets, I., Sugiyama, M., & Mandic, D. P. (2017). Tensor Networks for Dimensionality Reduction and Large-Scale Optimization: Part 2 Applications and Future Perspectives. Foundations and Trends® in Machine Learning, 9(6), 431-673. doi:10.1561/2200000067
* Rolf Unbehauen & Andrzej Cichocki, (2012). MOS Switched-Capacitor and Continuous-time Integrated Circuits and Systems: Analysis and Design. Springer Science & Business Media. ISBN 978-3-642-83677-0,doi:10.1007/978-3-642-83677-0

## Awards and honors

* Andrzej Cichocki was honored to be included in the 2021-2023 lists of Highly Cited Researchers list by Clarivate Web of Science.
* 2018 The best paper award in 2018 in IEEE Signal Processing Magazine for the paper “Tensor decompositions for signal processing applications: From two-way to multiway component analysis”, coauthored by A. Cichocki, D. Mandic, L De Lathauwer, A.H. Phan, Q. Zhao, C. Caiafa, G, Zhao
* 2018 H.C. (Honoris Causa) Doctorate, awarded by Nicolaus Copernicus University, Torun, Poland, February 27, 2022 .
* 2016 Excellent ICONIP Paper Award for the paper authored by Namgil Lee, Anh-Huy Phan, Fengyu Cong, Andrzej Cichocki. “Nonnegative tensor train decompositions for multi-domain feature extraction and clustering”
* 2015 The best paper award in Journal Entropy the paper “Generalized Alpha-Beta divergences and their application to robust non-negative matrix factorization” Entropy 2011, 13(1), 134–170; coauthored by A. Cichocki, S. Cruces and S. Amari.
* 2014 The Best paper award in Journal Entropy for 2014 for the paper coauthored by Andrzej Cichocki and Shun'ichi Amari, “Families of Alpha- Beta- and Gamma- Divergences: Flexible and robust measures of similarities”.
* 2013 Andrzej Cichocki was named Fellow of the Institute of Electrical and Electronics Engineers (IEEE) in 2013 for contributions to applications of blind signal processing and artificial neural networks.
* 2013 He was honored with an entry in the Golden Book of Alumni of Warsaw University of Technology for his professional achievements.
* 2010 APNNA Best Paper Award for the paper coauthored by Yunjun Nam, Qibin Zhao, Andrzej Cichocki, and Seungjin Choi “A tongue-machine interface: Detection of tongue positions by glossokinetic potentials,” in Proceedings of the International Conference on Neural Information Processing (ICONIP-2010), Sydney, Australia, November 22–25, 2010.
* 1995 Received a title of Professor in Poland from the President of the country
* 1984-1985 Winner of Alexander von Humboldt Award in Germany.