Description
Leader of the group Machine Learning: Peter Grunwald.
Our research group focuses on how computer programs can learn from and understand data, and then make useful predictions based on it. These algorithms integrate insights from various fields, including statistics, artificial intelligence and neuroscience.
Machinelearning applications are increasingly part of every aspect of life, from speech recognition on cell phones to illness prediction in healthcare. One common problem is extremely polluted data, for which no single model can provide adequate explanations. At CWI we address this issue with statistical machine learning based on combining predictions from different models and experts in order to achieve reliable conclusions.
We also study how networks of neurons in the brain process information, and how modern deeplearning methods can benefit from neuroscience. We develop novel neural networks, like Deep Adaptive Spiking Neural Networks, and also theoretical models of neural learning and information processing in biology. Applications of our work range from lowenergy consumption neural machine learning to neuroprosthetics, to increased insight into the question of how the brain works.
News
CWI starts research on spiking neural networks
Sander Bohte, researcher in the life science group of the Centrum Wiskunde & Informatica (CWI) in Amsterdam, starts in collaboration with researchers from the University of Amsterdam (UvA) a new project on spiking neural networks.
Brain mechanisms better understood with new model
Building a neural network with the same properties and capacity as the human brain is the holy grail in neuroinformatics. Such a network would not only explain the inner workings of the brain, but would also pave the road for braincontrolled machines such as computers operated by thought and robot limbs for the handicapped.
CWI simulates brain activity on video cards
Neuroinformaticists of Centrum Wiskunde & Informatica (CWI) in Amsterdam managed to simulate complex brain activity on simple video cards. The simulated brain contains 50,000 neurons communicating with 35 million signals per second. This is comparable to the brain capacity of insects such as ants or flies.
Early genetic code very resistant to mutation
Researchers of Centrum Wiskunde & Informatica (CWI) in Amsterdam show that the genetic code is remarkably resistant to DNA replication errors. This might explain the success of the common ancestor of all life, who 3,5 billion years ago developed the genetic code that resides in every organism.
Current events
ML Seminar: Glenn Shafer (Rutgers Business School – Newark and New Brunswick)
 20181217T11:00:00+01:00
 20181217T12:00:00+01:00
ML Seminar: Glenn Shafer (Rutgers Business School – Newark and New Brunswick)
Start: 20181217 11:00:00+01:00 End: 20181217 12:00:00+01:00
Everyone is welcome to attend the ML seminar of Glenn Schafer ( Rutgers Business School – Newark and New Brunswick)
Title: GameTheoretic Statistics
Abstract:
Fermat and Pascal’s two different methods for solving the problem of division lead to two different mathematical foundations for probability theory: a measuretheoretic foundation that generalizes the method of counting cases used by Fermat, and a gametheoretic foundation that generalizes the method of backward recursion used by Pascal. The gametheoretic foundation has flourished in recent decades, as documented by my forthcoming book with Vovk, GameTheoretic Probability and Finance. In this book’s formulation, probability typically involves three players, a player who offers betting rates (Forecaster), a player who tests the reliability of the forecaster by trying to multiply the capital he risks betting at these rates (Skeptic), and a player who decides the outcomes (Reality).
Gametheoretic statistics is less developed but appears to offer powerful and flexible resources for applications. One way of using the
game between Forecaster, Skeptic, and Reality in applications is to suppose there are multiple Forecasters, each making forecasts according to a given probability model. This makes the picture look like standard statistical modeling in the tradition of Karl Pearson and R. A. Fisher, but it is only one possibility. In this talk, based on Chapter 10 of GameTheoretic Probability and Finance, I will explore some other possibilities, drawing on examples from least squares, survival analysis, and quantum computing.
Members
Associated Members
Publications

van Doorn, J, Ly, A, Marsman, M, & Wagenmakers, E.J. (2019). Bayesian estimation of Kendall's τ using a latent normal approach. Statistics & Probability Letters, 145, 268–272. doi:10.1016/j.spl.2018.10.004

Karamanis, M, Zambrano, D, & Bohte, S.M. (2018). Continuoustime spikebased reinforcement learning for working memory tasks. In Lecture Notes in Computer Science/Lecture Notes in Artificial Intelligence (pp. 250–262). doi:10.1007/9783030014216_25

Dora, S, Pennartz, C, & Bohte, S.M. (2018). A deep predictive coding network for inferring hierarchical causes underlying sensory inputs. In Lecture Notes in Computer Science/Lecture Notes in Artificial Intelligence (pp. 457–467). doi:10.1007/9783030014247_45

Pozzi, I, Nusselder, R.B.P, Zambrano, D, Bohte, S.M, & Iliadis, L. (2018). Gating sensory noise in a spiking subtractive LSTM. In V Kůrková, Y Manolopoulos, B Hammer, & I Maglogiannis (Eds.), Artificial Neural Networks and Machine Learning  ICANN 2018 (pp. 284–293). Springer, Cham. doi:10.1007/9783030014186_28

Sander Bohté  Bionieuws  020618. (2018). Sander Bohté  Bionieuws  020618.

Grünwald, P.D. (2018). Safe probability. Journal of Statistical Planning and Inference, 195, 47–63. doi:10.1016/j.jspi.2017.09.014

Eén alarmerend bericht, en iedereen heeft het idee: het gaat héél slecht  NEMO Kennislink  26022018. (2018). Eén alarmerend bericht, en iedereen heeft het idee: het gaat héél slecht  NEMO Kennislink  26022018.

Sterkenburg, T.F. (2018, January 18). Universal prediction : a philosophical investigation.

Leitao Rodriguez, A, Oosterlee, C.W, Ortiz Gracia, L, & Bohte, S.M. (2018). On the datadriven COS method. Applied Mathematics and Computation, 317, 68–84. doi:10.1016/j.amc.2017.09.002

van Gerven, M, & Bohte, S.M. (2017). Editorial: Artificial neural networks as models of neural information processing. Frontiers in Computational Neuroscience (Vol. 11). doi:10.3389/fncom.2017.00114
Software
Squint: Experimenting in Prediction with Expert Advice problems
Squint provides a codebase to perform numerical proofofconcept experiments in learning theory, particularly in Prediction with Expert Advice problems, a core problem in learning theory.
Current projects with external funding

Deep Spiking Vision: Better, Faster, Cheaper (DEVIS)

Efficient Deep Learning Platforms (eDLP)

Enabling Personalized Interventions (EPI)

Safe Bayesian Inference: A Theory of Misspecification based on Statistical Learning (SAFEBAYES)
Related partners

Philips

KPMG

SURFsara B.V.

Universiteit van Amsterdam

Vrije Universiteit Amsterdam