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We present an apparatus optimized for tracking swimming microorganisms in the size range 10-1000 microns, in three dimensions (3D), far from surfaces, and with negligible background convective fluid motion. CCD cameras attached to two long…

软凝聚态物质 · 物理学 2009-01-13 Knut Drescher , Kyriacos C. Leptos , Raymond E. Goldstein

In this paper we study the controllability of an artificial advection-diffusion system through the boundary. Suitable Carleman estimates give us the observability on the adjoint system in the one dimensional case. We also study some basic…

最优化与控制 · 数学 2016-04-05 Pierre Cornilleau , Sergio Guerrero

The optimal disturbance rejection control problem is considered for consensus tracking systems affected by external persistent disturbances and noise. Optimal estimated values of system states are obtained by recursive filtering for the…

机器人学 · 计算机科学 2012-05-09 Jian Yuan Wen-Xia Zhang , Zhou-Hai Zhou

The paper is devoted to a free-time optimal control problem for sweeping processes. We develop a constructive finite-difference approximation procedure that allows us to establish necessary optimality conditions for discrete optimal…

Consensus formation tracking of multiple autonomous underwater vehicles (AUVs) subject to nonlinear and uncertain dynamics is a challenging problem in robotics. To tackle this challenge, a distributed bioinspired sliding mode controller is…

系统与控制 · 电气工程与系统科学 2022-06-20 Tao Yan , Zhe Xu , Simon X. Yang

With the advance of fluorescence imaging technologies, recently cell biologists are able to record the movement of protein vesicles within a living cell. Automatic tracking of the movements of these vesicles become key for qualitative…

定量方法 · 定量生物学 2015-06-09 Min Xu

This paper proposes a novel method for formation path following of multiple underactuated autonomous underwater vehicles. The method combines line-of-sight guidance with null-space-based behavioral control, allowing the vehicles to follow…

系统与控制 · 电气工程与系统科学 2022-10-27 Josef Matouš , Kristin Y. Pettersen , Claudio Paliotta

This paper solves the problem of station-keeping control of a surface vessel under conditions of sinusoidal disturbances with unknown parameters. The proposed control algorithm is based on the geometric approach with the use of the adaptive…

系统与控制 · 电气工程与系统科学 2021-10-20 O. I. Borisov , F. B. Gromova , A. Iu. Zhivitckii , A. A. Pyrkin

This paper addresses distributed robust learning-based control for consensus formation tracking of multiple underwater vessels, in which the system parameters of the marine vessels are assumed to be entirely unknown and subject to the…

机器人学 · 计算机科学 2023-08-21 Tao Yan , Zhe Xu , Simon X. Yang

Urban Visual Pollution (UVP) has emerged as a critical concern, yet research on automatic detection and application remains fragmented. This scoping review maps the existing deep learning-based approaches for detecting, classifying, and…

计算机视觉与模式识别 · 计算机科学 2026-02-11 Mohammad Masudur Rahman , Md. Rashedur Rahman , Ashraful Islam , Saadia B Alam , M Ashraful Amin

Navigation and guidance of autonomous vehicles is a fundamental problem in robotics, which has attracted intensive research in recent decades. This report is mainly concerned with provable collision avoidance of multiple autonomous vehicles…

最优化与控制 · 数学 2014-01-28 Michael Hoy

A novel approach for robust state estimation of marine vessels in rough water is proposed in this paper to enable tight collaboration between Unmanned Aerial Vehicles (UAVs) and a marine vessel, such as cooperative landing or object…

机器人学 · 计算机科学 2025-02-19 Filip Novák , Tomáš Báča , Ondřej Procházka , Martin Saska

We propose a multi-layer approach to simulate hyperpycnal and hypopycnal plumes in flows with free surface. The model allows to compute the vertical profile of the horizontal and the vertical components of the velocity of the fluid flow.…

流体动力学 · 物理学 2017-05-16 T. Morales de Luna , E. D. Fernández-Nieto , M. J. Castro Díaz

Marine litter poses significant threats to marine and coastal environments, with its impacts ever-growing. Remote sensing provides an advantageous supplement to traditional mitigation techniques, such as local cleaning operations and trawl…

计算机视觉与模式识别 · 计算机科学 2023-06-28 Bianca Matos de Barros , Douglas Galimberti Barbosa , Cristiano Lima Hackmann

Closed-loop control of turbulent flows is a challenging problem with important practical and fundamental implications. We perform closed-loop control of forced, turbulent jets based on a wave-cancellation strategy. The study is motivated by…

流体动力学 · 物理学 2020-09-22 Igor A. Maia , Peter Jordan , André V. G. Cavalieri , Eduardo Martini , Flávio Silvestre

Performance measurement of robotic controllers based on fuzzy logic, operating under uncertainty, is a subject area which has been somewhat ignored in the current literature. In this paper standard measures such as RMSE are shown to be…

机器人学 · 计算机科学 2016-11-17 Naisan Benatar , Uwe Aickelin , Jonathan M. Garibald

The use of Autonomous Surface Vehicles, equipped with water quality sensors and artificial vision systems, allows for a smart and adaptive deployment in water resources environmental monitoring. This paper presents a real implementation of…

Autonomous vehicles rely heavily upon their perception subsystems to see the environment in which they operate. Unfortunately, the effect of variable weather conditions presents a significant challenge to object detection algorithms, and…

The exploration of under-ice environments presents unique challenges due to limited access for scientific research. This report investigates the potential of deploying a fully actuated Remotely Operated Vehicle (ROV) for shallow area…

机器人学 · 计算机科学 2024-05-20 Hanzhi Yang

In this paper, we address the problem of autonomous search and vessel detection in an unknown GNSS-denied maritime environment with fixed-wing UAVs. The main challenge in such environments with limited localization, communication range, and…