no code implementations • ICML 2020 • Robert Mattila, Cristian Rojas, Eric Moulines, Vikram Krishnamurthy, Bo Wahlberg
Can the parameters of a hidden Markov model (HMM) be estimated from a single sweep through the observations -- and additionally, without being trapped at a local optimum in the likelihood surface?
no code implementations • 7 Nov 2023 • Inês Lourenço, Robert Mattila, Rodrigo Ventura, Bo Wahlberg
We conclude that the agent is able to perceive time similarly to animals when it comes to their intrinsic mechanisms of interpreting time and performing time-aware actions.
no code implementations • 4 Apr 2023 • Rebecka Winqvist, Inês Lourenco, Francesco Quinzan, Cristian R. Rojas, Bo Wahlberg
In this framework, an expert agent, referred to as the teacher, modifies the data used by a learning agent, known as the student, to improve its estimation process.
no code implementations • 3 Apr 2023 • Dženan Lapandić, Christos K. Verginis, Dimos V. Dimarogonas, Bo Wahlberg
In this paper we propose a novel distributed model predictive control (DMPC) based algorithm with a trajectory predictor for a scenario of landing of unmanned aerial vehicles (UAVs) on a moving unmanned surface vehicle (USV).
no code implementations • 13 Jun 2022 • Dženan Lapandić, Christos K. Verginis, Dimos V. Dimarogonas, Bo Wahlberg
We propose a control protocol based on the prescribed performance control (PPC) methodology for a quadrotor unmanned aerial vehicle (UAV).
no code implementations • 15 Nov 2021 • Inês Lourenço, Rebecka Winqvist, Cristian R. Rojas, Bo Wahlberg
A classical learning setting typically concerns an agent/student who collects data, or observations, from a system in order to estimate a certain property of interest.
no code implementations • 15 Feb 2021 • Dženan Lapandić, Linnea Persson, Dimos V. Dimarogonas, Bo Wahlberg
The main contribution is a rendezvous algorithm with an online update rule of the rendezvous location.
no code implementations • 3 Feb 2021 • Rebecka Winqvist, Arun Venkitaraman, Bo Wahlberg
As a proof of concept, we apply this approach to explicit MPC (eMPC), for which the feedback law is a piece-wise affine function of the state, but the number of pieces grows rapidly with the state dimension.
no code implementations • 9 Dec 2020 • Inês Lourenço, Robert Mattila, Cristian R. Rojas, Bo Wahlberg
We consider a cooperative system identification scenario in which an expert agent (teacher) knows a correct, or at least a good, model of the system and aims to assist a learner-agent (student), but cannot directly transfer its knowledge to the student.
no code implementations • 3 Oct 2020 • Lucas N. Egidio, Anders Hansson, Bo Wahlberg
The step-length policy is learned from data of similar optimization problems, avoids additional evaluations of the objective function, and guarantees that the output step remains inside a pre-defined interval.
no code implementations • 12 Jun 2020 • Arun Venkitaraman, Anders Hansson, Bo Wahlberg
Our hypothesis is that the use of tasksimilarity helps meta-learning when the available tasks are limited and may contain outlier/ dissimilar tasks.
no code implementations • 8 May 2020 • Rebecka Winqvist, Arun Venkitaraman, Bo Wahlberg
The contribution of this paper is a framework for training and evaluation of Model Predictive Control (MPC) implemented using constrained neural networks.
no code implementations • 20 Dec 2019 • Inês Lourenço, Bo Wahlberg, Rodrigo Ventura
In this paper, we study how to replicate neural mechanisms involved in time perception, allowing robots to take a step towards temporal cognition.
no code implementations • 26 Nov 2019 • Arun Venkitaraman, Håkan Hjalmarsson, Bo Wahlberg
We address the issue of estimating the topology and dynamics of sparse linear dynamic networks in a hyperparameter-free setting.
no code implementations • 26 Nov 2019 • Arun Venkitaraman, Saikat Chatterjee, Bo Wahlberg
Kernel and linear regression have been recently explored in the prediction of graph signals as the output, given arbitrary input signals that are agnostic to the graph.
no code implementations • NeurIPS 2017 • Robert Mattila, Cristian Rojas, Vikram Krishnamurthy, Bo Wahlberg
This paper considers a number of related inverse filtering problems for hidden Markov models (HMMs).
no code implementations • 22 Jul 2015 • Robert Mattila, Cristian R. Rojas, Bo Wahlberg
Often, when applied in practice, the parameters of these models have to be estimated.
no code implementations • 1 Dec 2014 • Cristian R. Rojas, Bo Wahlberg
It is known that TV denoising suffers from the so-called stair-case effect, which leads to detecting false change points.
no code implementations • 22 Jul 2014 • Niclas Blomberg, Cristian R. Rojas, Bo Wahlberg
This paper concerns model reduction of dynamical systems using the nuclear norm of the Hankel matrix to make a trade-off between model fit and model complexity.
no code implementations • 21 Jan 2014 • Cristian R. Rojas, Bo Wahlberg
In this paper we analyze the asymptotic properties of l1 penalized maximum likelihood estimation of signals with piece-wise constant mean values and/or variances.