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Steering vectors are a lightweight method for controlling language model behavior by adding a learned bias to the activations at inference time. Although effective on average, steering effect sizes vary across samples and are unreliable for…

计算与语言 · 计算机科学 2026-02-23 Joschka Braun

Biological evidence shows that animals are capable of evading eminent collision without using depth information, relying solely on looming stimuli. In robotics, collision avoidance among uncooperative vehicles requires measurement of…

机器人学 · 计算机科学 2021-03-24 Thiago Marinho , Massi Amrouche , Dusan Stipanovic , Venanzio Cichella , Naira Hovakimyan

Environmental, demographical and psychological factors have a demonstrated impact on risky crossing behaviour. In this work we focus on the potential influence of social factors on the considered phenomenon (i.e. group crossing decision).…

多智能体系统 · 计算机科学 2018-01-10 Andrea Gorrini , Luca Crociani , Giuseppe Vizzari , Stefania Bandini

Estimating the direction of ambient fluid flow is key for many flying or swimming animals and robots, but can only be accomplished through indirect measurements and active control. Recent work with tethered flying insects indicates that…

系统与控制 · 电气工程与系统科学 2022-04-20 Floris van Breugel

In this paper, we present a novel vision-based framework for tracking dynamic objects using guidance laws based on a rendezvous cone approach. These guidance laws enable an unmanned aircraft system equipped with a monocular camera to…

计算机视觉与模式识别 · 计算机科学 2022-05-17 Pritam Karmokar , Kashish Dhal , William J. Beksi , Animesh Chakravarthy

Leader-follower navigation is a popular class of multi-robot algorithms where a leader robot leads the follower robots in a team. The leader has specialized capabilities or mission-critical information (e.g. goal location) that the…

机器人学 · 计算机科学 2021-09-16 Ankur Deka , Wenhao Luo , Huao Li , Michael Lewis , Katia Sycara

The survival chance of a prey chased by a predator depends not only on their relative speeds but importantly also on the local environment they have to face. For example, a wolf chasing a deer might take a long time to cross a river which…

软凝聚态物质 · 物理学 2021-03-23 Fabian Jan Schwarzendahl , Hartmut Löwen

Better understanding the natural world is a crucial task with a wide range of applications. In environments with close proximity between humans and animals, such as zoos, it is essential to better understand the causes behind animal…

Multi-view approaches to people-tracking have the potential to better handle occlusions than single-view ones in crowded scenes. They often rely on the tracking-by-detection paradigm, which involves detecting people first and then…

计算机视觉与模式识别 · 计算机科学 2022-10-20 Martin Engilberge , Weizhe Liu , Pascal Fua

This paper introduces a diffusion-based planner for leader--follower formation control in cluttered environments. The diffusion policy is used to generate the trajectory of the midpoint of two leaders as a rigid bar in the plane, thereby…

机器人学 · 计算机科学 2026-01-19 Hieu Do Quang , Chien Truong-Quoc , Quoc Van Tran

Understanding the mechanics behind the coordinated movement of mobile animal groups (collective motion) provides key insights into their biology and ecology, while also yielding algorithms for bio-inspired technologies and autonomous…

多智能体系统 · 计算机科学 2018-08-15 Joshua Garland , Andrew M. Berdahl , Jie Sun , Erik Bollt

Animal collective behavior is often modeled with self-propelled particles, assuming each individual has ``omniscient'' knowledge of its neighbors. Yet, neighbors may be hidden from view and we do not know the effect of this information…

生物物理 · 物理学 2024-03-20 Diego Castro , Franck Ruffier , Christophe Eloy

Collective migration of animals in a cohesive group is rendered possible by a strategic distribution of tasks among members: some track the travel route, which is time and energy-consuming, while the others follow the group by interacting…

最优化与控制 · 数学 2015-08-05 Benedetto Piccoli , Nastassia Pouradier Duteil , Benjamin Scharf

The properties of biological microswimmers are to a large extent determined by fluid-mediated interactions, which govern their propulsion, perception of their surrounding, and the steering of their motion for feeding or in pursuit.…

软凝聚态物质 · 物理学 2024-06-04 Segun Goh , Roland G. Winkler , Gerhard Gompper

In this report we show the emergent behavior of a group of agents, ordered from 1 to n, performing deviated, linear, cyclic pursuit, in the presence of a broadcast guidance control. Each agent senses the relative position of its target,…

机器人学 · 计算机科学 2020-11-03 Ilana Segall , Alfred M. Bruckstein

Previous studies demonstrated empirically that human mobility exhibits Levy flight behaviour. However, our knowledge of the mechanisms governing this Levy flight behaviour remains limited. Here we analyze over 72 000 people's moving…

数据分析、统计与概率 · 物理学 2009-09-15 Bin Jiang , Junjun Yin , Sijian Zhao

A visually-grounded navigation instruction can be interpreted as a sequence of expected observations and actions an agent following the correct trajectory would encounter and perform. Based on this intuition, we formulate the problem of…

计算机视觉与模式识别 · 计算机科学 2019-11-27 Peter Anderson , Ayush Shrivastava , Devi Parikh , Dhruv Batra , Stefan Lee

Formation control is essential for swarm robotics, enabling coordinated behavior in complex environments. In this paper, we introduce a novel formation control system for an indoor blimp swarm using a specialized leader-follower approach…

机器人学 · 计算机科学 2025-05-15 Tianfu Wu , Jiaqi Fu , Wugang Meng , Sungjin Cho , Huanzhe Zhan , Fumin Zhang

With the introduction of the laterally bounded forces, the tilt-rotor gains more flexibility in the controller design. Typical feedback linearization methods utilize all the inputs in controlling this vehicle; the magnitudes as well as the…

机器人学 · 计算机科学 2022-03-29 Zhe Shen , Yudong Ma , Takeshi Tsuchiya

We address the problem of tracking and detecting interactions between the different groups of runners that form during a race. In athletic races control points are set to monitor the progress of athletes over the course. Intuitively, a {\it…

计算几何 · 计算机科学 2018-12-31 Y. Diez , M. Fort , M. Korman , J. A. Sellarès