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Transformers have achieved state-of-the-art performance in numerous tasks. In this paper, we propose a continuous-time formulation of transformers. Specifically, we consider a dynamical system whose governing equation is parametrized by…

机器学习 · 计算机科学 2025-02-03 Kelvin Kan , Xingjian Li , Stanley Osher

A simple one-dimensional spring-block model elaborated for the idealized single-lane highway traffic reveals the causes for the emergence of traffic jams. Based on the stop-time statistics of one car in the row, an order parameter is…

物理与社会 · 物理学 2011-11-09 Ferenc Jarai-Szabo , Zoltan Neda

Modular autonomous vehicles (MAVs) represent a groundbreaking concept that integrates modularity into the ongoing development of autonomous vehicles. This innovative design introduces unique features to traffic flow, allowing multiple…

多智能体系统 · 计算机科学 2024-12-25 Lanhang Ye , Toshiyuki Yamamoto

The aim of this paper is to develop a crowd motion model designed to handle highly packed situations. The model we propose rests on two principles: We first define a spontaneous velocity which corresponds to the velocity each individual…

数值分析 · 数学 2009-01-09 Bertrand Maury , Juliette Venel

Connected and automated vehicles (CAVs) provide the most intriguing opportunity to improve energy efficiency, traffic flow, and safety. In earlier work, we addressed the constrained optimal coordination problem of CAVs at different traffic…

最优化与控制 · 数学 2021-06-11 A M Ishtiaque Mahbub , Andreas A. Malikopoulos

Computing optimal transport (OT) for general high-dimensional data has been a long-standing challenge. Despite much progress, most of the efforts including neural network methods have been focused on the static formulation of the OT…

机器学习 · 统计学 2025-03-12 Chen Xu , Xiuyuan Cheng , Yao Xie

This paper presents a new mathematical model of vehicular traffic, based on the methods of the generalized kinetic theory, in which the space of microscopic states (position and velocity) of the vehicles is genuinely discrete. While in the…

数学物理 · 物理学 2013-11-12 Luisa Fermo , Andrea Tosin

This paper presents scalable traffic stability analysis for both pure autonomous vehicle (AV) traffic and mixed traffic based on continuum traffic flow models. Human vehicles are modeled by a non-equilibrium traffic flow model, i.e.,…

最优化与控制 · 数学 2024-09-23 Kuang Huang , Xuan Di , Qiang Du , Xi Chen

The lane reversal has proven to be a useful method to mitigate traffic congestion during rush hour or in case of specific events that affect high traffic volumes. In this work we propose a methodology that is placed within optimization via…

神经与进化计算 · 计算机科学 2014-09-16 Enrique Gabriel Baquela , Ana Carolina Olivera

We consider the problem of steering an initial probability density for the state vector of a linear system to a final one, in finite time, using minimum energy control. In the case where the dynamics correspond to an integrator ($\dot x(t)…

最优化与控制 · 数学 2015-02-05 Yongxin Chen , Tryphon Georgiou , Michele Pavon

In this paper we present and analyze a queueing-theoretical model for autonomous mobility-on-demand (MOD) systems where robotic, self-driving vehicles transport customers within an urban environment and rebalance themselves to ensure…

机器人学 · 计算机科学 2014-04-18 Rick Zhang , Marco Pavone

The Gipps car-following model is a widely used tool for studying and simulation traffic dynamics. Despite its popularity an often disregarded property is that under heterogeneous parametrization on the individual vehicles in the traffic…

适应与自组织系统 · 物理学 2019-02-14 Leonhard Lücken

The paper presents a movement strategy for Connected and Automated Vehicles (CAVs) in a lane-free traffic environment with vehicle nudging by use of an optimal control approach. State-dependent constraints on control inputs are considered…

We study a simple aggregation model that mimics the clustering of traffic on a one-lane roadway. In this model, each ``car'' moves ballistically at its initial velocity until it overtakes the preceding car or cluster. After this encounter,…

凝聚态物理 · 物理学 2009-10-22 E. Ben-Naim , P. L. Krapivsky , S. Redner

We investigate the behaviour of an original traffic model. The model considers a single multi-lane street, populated by autonomous vehicles directed from either end to the other. Lanes have no intrinsic directionality, and the vehicles are…

计算物理 · 物理学 2007-05-23 Federico Polito , Fergal Dalton

In this paper a spatial homogeneous vehicular traffic flow model based on a stochastic master equation of Boltzmann type in the acceleration variable is solved numerically for a special driver interaction model. The solution is done by a…

其他凝聚态物理 · 物理学 2009-11-10 K. Thomas Waldeer

We propose and analyse a new microscopic second order Follow-the-Leader type scheme to describe traffic flows. The main novelty of this model consists in multiplying the second order term by a nonlinear function of the global density, with…

偏微分方程分析 · 数学 2025-03-04 Dario Mazzoleni , Emanuela Radici , Filippo Riva

We propose a stochastic model for the intersection of two urban streets. The vehicular traffic at the intersection is controlled by a set of traffic lights which can be operated subject to fix-time as well as traffic adaptive schemes.…

凝聚态物理 · 物理学 2012-03-19 M. Ebrahim Fouladvand , Zeinab Sadjadi , M. Reza Shaebani

In traffic flow, self-organized wave propagation, which characterizes congestion, has been reproduced in macroscopic and microscopic models. Hydrodynamic models, a subset of macroscopic models, can be derived from microscopic-level…

动力系统 · 数学 2024-06-21 Kota Ikeda , Toru Kan , Toshiyuki Ogawa

An exact solution for a high speed deterministic traffic model with open boundaries and synchronous update rule is presented. Because of the strong correlations in the model, the qualitative structure of the stationary state can be…

元胞自动机与格子气 · 物理学 2009-10-31 Jan de Gier