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Showing 48 results for "ricardo rocha" in Engineering
Engineering Preprint PDF DOI

Macroscopic transport patterns of UAV traffic in 3D anisotropic wind fields: A constraint-preserving hybrid PINN-FVM approach

Hanbing Liang, Fujun Liu · 2026

Macroscopic unmanned aerial vehicle (UAV) traffic organization in three-dimensional airspace faces significant challenges from static wind fields and complex obstacles. A critical difficulty lies in s…

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Engineering Preprint PDF DOI

Differentiable Stochastic Traffic Dynamics: Physics-Informed Generative Modelling in Transportation

Wuping Xin · 2026

Macroscopic traffic flow is stochastic, but the physics-informed deep learning methods currently used in transportation literature embed deterministic PDEs and produce point-valued outputs; the stocha…

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Engineering Preprint PDF DOI

A Novel Reconfigurable Dexterous Hand Based on Triple-Symmetric Bricard Parallel Mechanism

Chunxu Tian, Zhichao Huang, Hongzeng Li, Bo Wang, Jinghao Jia, Yirui Sun, Dan Zhang · 2026

This paper introduces a novel design for a robotic hand based on parallel mechanisms. The proposed hand uses a triple-symmetric Bricard linkage as its reconfigurable palm, enhancing adaptability to ob…

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Engineering Preprint PDF DOI

Streaming Speech Recognition with Decoder-Only Large Language Models and Latency Optimization

Genshun Wan, Wenhui Zhang, Jing-Xuan Zhang, Shifu Xiong, Jianqing Gao, Zhongfu Ye · 2026

Recent advances have demonstrated the potential of decoderonly large language models (LLMs) for automatic speech recognition (ASR). However, enabling streaming recognition within this framework remain…

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Engineering Preprint PDF DOI

Pressure-robust enriched Galerkin finite element methods for coupled Navier-Stokes and heat equations

Sanjeeb Poudel, Sanghyun Lee, Lin Mu · 2025

We propose a pressure-robust enriched Galerkin (EG) finite element method for the incompressible Navier-Stokes and heat equations in the Boussinesq regime. For the Navier-Stokes equations, the EG form…

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Engineering Preprint PDF DOI

Constrained Control of PDE Traffic Flow via Spatial Control Barrier Functions

Brian Block, Stephanie Stockar · 2025

In this paper, a constrained control approach to variable speed limit (VSL) control for macroscopic partial differential equations (PDE) traffic models is developed. Control Lyapunov function (CLF) th…

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Engineering Preprint PDF DOI

From High-SNR Radar Signal to ECG: A Transfer Learning Model with Cardio-Focusing Algorithm for Scenarios with Limited Data

Yuanyuan Zhang, Haocheng Zhao, Sijie Xiong, Rui Yang, Eng Gee Lim, Yutao Yue · 2025

Electrocardiogram (ECG), as a crucial find-grained cardiac feature, has been successfully recovered from radar signals in the literature, but the performance heavily relies on the high-quality radar s…

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Engineering Preprint PDF DOI

X-LRM: X-ray Large Reconstruction Model for Extremely Sparse-View Computed Tomography Recovery in One Second

Guofeng Zhang, Ruyi Zha, Hao He, Yixun Liang, Alan Yuille, Hongdong Li, Yuanhao Cai · 2025

Sparse-view 3D CT reconstruction aims to recover volumetric structures from a limited number of 2D X-ray projections. Existing feedforward methods are constrained by the scarcity of large-scale traini…

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Engineering Preprint PDF DOI

Physics-constrained Active Learning for Soil Moisture Estimation and Optimal Sensor Placement

Jianxin Xie, Bing Yao, Zheyu Jiang · 2024

Soil moisture is a crucial hydrological state variable that has significant importance to the global environment and agriculture. Precise monitoring of soil moisture in crop fields is critical to redu…

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Engineering Preprint PDF DOI

LQ Control of Traffic Flow Models via Variable Speed Limits

Brian Block, Stephanie Stockar · 2024

In this paper, an extension of a linear control design for hyperbolic linear partial differential equations is presented for a first-order traffic flow model. Starting from the Lighthill-Whitham-Richa…

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Engineering Preprint PDF DOI

Enabling Large-scale Heterogeneous Collaboration with Opportunistic Communications

Fernando Cladera, Zachary Ravichandran, Ian D. Miller, M. Ani Hsieh, C. J. Taylor, Vijay Kumar · 2023

Multi-robot collaboration in large-scale environments with limited-sized teams and without external infrastructure is challenging, since the software framework required to support complex tasks must b…

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Engineering Preprint PDF DOI

CAV Traffic Control to Mitigate the Impact of Congestion from Bottlenecks: A Linear Quadratic Regulator Approach and Microsimulation Study

Suyash C. Vishnoi, Junyi Ji, MirSaleh Bahavarnia, Yuhang Zhang, Ahmad F. Taha, Christian G. Claudel, Daniel B. Work · 2023

This work investigates traffic control via controlled connected and automated vehicles (CAVs) using novel controllers derived from the linear-quadratic regulator (LQR) theory. CAV-platoons are modeled…

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Engineering Preprint PDF DOI

Sensitivity-Informed Parameter Selection for Improved Soil Moisture Estimation from Remote Sensing Data

Bernard T. Agyeman, Erfan Orouskhani, Mohamed Naouri, Willemijn Appels, Maik Wolleben, Jinfeng Liu (University of Alberta), Sirish L. Shah · 2023

Improving the accuracy of soil moisture estimation is required for advancing irrigation scheduling and water conservation efforts. Central to this task are soil hydraulic parameters, which govern mois…

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Engineering Preprint PDF DOI

Self-regularised Minimum Latency Training for Streaming Transformer-based Speech Recognition

Mohan Li, Rama Doddipatla, Catalin Zorila · 2023

This paper proposes a self-regularised minimum latency training (SR-MLT) method for streaming Transformer-based automatic speech recognition (ASR) systems. In previous works, latency was optimised by …

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Engineering Preprint PDF DOI

Fully Automated Deep Learning-enabled Detection for Hepatic Steatosis on Computed Tomography: A Multicenter International Validation Study

Zhongyi Zhang, Guixia Li, Ziqiang Wang, Feng Xia, Ning Zhao, Huibin Nie, Zezhong Ye, Joshua Lin, Yiyi Hui, Xiangchun Liu · 2022

Despite high global prevalence of hepatic steatosis, no automated diagnostics demonstrated generalizability in detecting steatosis on multiple international datasets. Traditionally, hepatic steatosis …

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Engineering Preprint PDF DOI

A Framework to Evaluate Independent Component Analysis applied to EEG signal: testing on the Picard algorithm

Gwenevere Frank, Scott Makeig, Arnaud Delorme · 2022

Independent component analysis (ICA), is a blind source separation method that is becoming increasingly used to separate brain and non-brain related activities in electroencephalographic (EEG) and oth…

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Engineering Preprint PDF DOI

A Tutorial on Solution Properties of State Space Models of Dynamical Systems

Bassam Bamieh · 2022

The starting point of analysis of state space models is investigating existence, uniqueness and solution properties such as the semigroup property, and various formulas for the solutions. Several conc…

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Engineering Preprint PDF DOI

Transformer-based Streaming ASR with Cumulative Attention

Mohan Li, Shucong Zhang, Catalin Zorila, Rama Doddipatla · 2022

In this paper, we propose an online attention mechanism, known as cumulative attention (CA), for streaming Transformer-based automatic speech recognition (ASR). Inspired by monotonic chunkwise attenti…

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Engineering Preprint PDF DOI

Adaptive model reduction and state estimation of agro-hydrological systems

Soumya R. Sahoo, Jinfeng Liu · 2021

Closed-loop irrigation can deliver a promising solution for precision irrigation. The accurate soil moisture (state) estimation is critical in implementing the closed-loop irrigation of agrohydrologic…

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Engineering Preprint PDF DOI

Knowledge-based optimal irrigation scheduling of agro-hydrological systems

Soumya R. Sahoo, Bernard T. Agyeman, Sarupa Debnath, Jinfeng Liu · 2021

The typical agricultural irrigation scheduler provides information on how much to irrigate and when to irrigate. The accurate and effective scheduler decision for a large agricultural field is still a…

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