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MIMO Grid Impedance Identification of Three-Phase Power Systems: Parametric vs. Nonparametric Approaches
(2023)2023 IEEE 62nd Conference on Decision and Control (CDC)A fast and accurate grid impedance measurement of three-phase power systems is crucial for online assessment of power system stability and adaptive control of grid-connected converters. Existing grid impedance measurement approaches typically rely on pointwise sinusoidal injections or sequential wideband perturbations to identify a nonparametric grid impedance curve via fast Fourier computations in the frequency domain. This is not only ...Conference Paper -
Designing Optimal Personalized Incentive for Traffic Routing using BIG Hype
(2023)2023 IEEE 62nd Conference on Decision and Control (CDC)We study the problem of routing plug-in electric and conventional fuel vehicles on a city scale using incentives. In our model, commuters selfishly aim to minimize a local cost that combines travel time and the financial expenses of using city facilities, i.e., parking and service stations. The traffic authority can influence the commuters’ routing choice via personalized discounts on parking tickets and on the energy price at service ...Conference Paper -
Revisiting Automated Topic Model Evaluation with Large Language Models
(2023)Proceedings of the 2023 Conference on Empirical Methods in Natural Language ProcessingTopic models help make sense of large text collections. Automatically evaluating their output and determining the optimal number of topics are both longstanding challenges, with no effective automated solutions to date. This paper evaluates the effectiveness of large language models (LLMs) for these tasks. We find that LLMs appropriately assess the resulting topics, correlating more strongly with human judgments than existing automated ...Conference Paper -
The Impact of Recommendation Systems on Opinion Dynamics: Microscopic versus Macroscopic Effects
(2023)2023 62nd IEEE Conference on Decision and Control (CDC)Recommendation systems are widely used in web services, such as social networks and e-commerce platforms, to serve personalized content to the users and, thus, enhance their experience. While personalization assists users in navigating through the available options, there have been growing concerns regarding its repercussions on the users and their opinions. Examples of negative impacts include the emergence of filter bubbles and the ...Conference Paper -
Multi-UAV Collaborative Monocular SLAM
(2017)2017 IEEE International Conference on Robotics and Automation, ICRA 2017Conference Paper -
SQ Lower Bounds for Random Sparse Planted Vector Problem
(2023)Proceedings of Machine Learning Research ~ Proceedings of the 34th International Conference on Algorithmic Learning TheoryConsider the setting where a ρ-sparse Rademacher vector is planted in a random d-dimensional subspace of R n. A classical question is how to recover this planted vector given a random basis in this subspace. A recent result by Zadik et al. (2021) showed that the Lattice basis reduction algorithm can recover the planted vector when n ⩾ d + 1. Although the algorithm is not expected to tolerate inverse polynomial amount of noise, it is ...Conference Paper -
Is Active Impedance the Key to a Breakthrough for Legged Robots?
(2016)Springer Tracts in Advanced Robotics ~ Robotics Research: The 16th International Symposium ISRRConference Paper -
Tutorial on Congestion Control in Multi-Area Transmission Grids via Online Feedback Equilibrium Seeking
(2023)2023 62nd IEEE Conference on Decision and Control (CDC)Online feedback optimization (OFO) is an emerging control methodology for real-time optimal steady-state control of complex dynamical systems. This tutorial focuses on the application of OFO for the autonomous operation of large-scale transmission grids, with a specific goal of minimizing renewable generation curtailment and losses while satisfying voltage and current limits. When this control methodology is applied to multi-area transmission ...Conference Paper -
Revisiting the Optimality of Word Lengths
(2023)Proceedings of the 2023 Conference on Empirical Methods in Natural Language ProcessingZipf (1935) posited that wordforms are optimized to minimize utterances’ communicative costs. Under the assumption that cost is given by an utterance’s length, he supported this claim by showing that words’ lengths are inversely correlated with their frequencies. Communicative cost, however, can be operationalized in different ways. Piantadosi et al. (2011) claim that cost should be measured as the distance between an utterance’s information ...Conference Paper -
Autonomous robotic stone stacking with online next best object target pose planning
(2017)Proceedings of the 2017 IEEE International Conference on Robotics and Automation (ICRA)Conference Paper