2 citations · 5 across the 7 of their papers we have counts for
8 papers
Dealing with Collinearity in Large-Scale Linear System Identification Using Gaussian Regression
Wenqi Cao, Gianluigi Pillonetto
Many problems arising in control require the determination of a mathematical model of the application. This has often to be performed starting from input-output data, leading to a…
Spectral Factorization of Rank-Deficient Rational Densities
Wenqi Cao, Anders Lindquist
Though there have been hundreds of methods on solving rational spectral factorization, most of them are based on a positive definite density matrix assumption. In this work, we pro…
A Smart Contract based Crowdfunding Mechanism for Hierarchical Federated Learning
Hongze Liu, Jie Li, Shijing Yuan +2
Hierarchical Federated Learning (HFL) is introduced as a promising technique that allows model owners to fully exploit computational resources and bandwidth resources to train the…
Dealing with collinearity in large-scale linear system identification using Bayesian regularization
Wenqi Cao, Gianluigi Pillonetto
We consider the identification of large-scale linear and stable dynamic systems whose outputs may be the result of many correlated inputs. Hence, severe ill-conditioning may affect…
Identification of Low Rank Vector Processes
Wenqi Cao, Giorgio Picci, Anders Lindquist
We study modeling and identification of stationary processes with a spectral density matrix of low rank. Equivalently, we consider processes having an innovation of reduced dimensi…
Modeling of Low Rank Time Series
Wenqi Cao, Anders Lindquist, Giorgio Picci
Rank-deficient stationary stochastic vector processes are present in many problems in network theory and dynamic factor analysis. In this paper we study hidden dynamical relations…
Modeling and Identification of Low Rank Vector Processes
Giorgio Picci, Wenqi Cao, Anders Lindquist
We study modeling and identification of processes with a spectral density matrix of low rank. Equivalently, we consider processes having an innovation of reduced dimension for whic…
Spectral Rank, Feedback, Causality and the Indirect Method for CARMA Identification
Wenqi Cao, Anders Lindquist, Giorgio Picci
Building on a recent paper by Georgiou and Lindquist [1] on the problem of rank deficiency of spectral densities and hidden dynamical relations after sampling of continuous-time st…