Predicting Pedestrian Trajectories Using Velocity-Space Reasoning

2013 ◽  
pp. 609-623 ◽  
Author(s):  
Sujeong Kim ◽  
Stephen J. Guy ◽  
Wenxi Liu ◽  
Rynson W. H. Lau ◽  
Ming C. Lin ◽  
...  
Keyword(s):  
Velocity Space

Kinematical evolution of Globular Clusters

2019 ◽  
Vol 14 (S351) ◽  
pp. 524-527
Author(s):  
Maria A. Tiongco ◽  
Enrico Vesperini ◽  
Anna Lisa Varri
Keyword(s):  
Angular Momentum ◽  
Structural Properties ◽  
Globular Clusters ◽  
Velocity Dispersion ◽  
Three Dimensional ◽  
Stellar Populations ◽  
Velocity Space ◽  
Fundamental Understanding

AbstractWe present several results of the study of the evolution of globular clusters’ internal kinematics, as driven by two-body relaxation and the interplay between internal angular momentum and the external Galactic tidal field. Via a large suite of N-body simulations, we explored the three-dimensional velocity space of tidally perturbed clusters, by characterizing their degree of velocity dispersion anisotropy and their rotational properties. These studies have shown that a cluster’s kinematical properties contain distinct imprints of the cluster’s initial structural properties, dynamical history, and tidal environment. Building on this fundamental understanding, we then studied the dynamics of multiple stellar populations in globular clusters, with attention to the largely unexplored role of angular momentum.

Inverse Velocity Space Spectra and Kinetic Equations

1967 ◽  
Vol 35 (10) ◽  
pp. 906-912
Author(s):  
Paul Diament
Keyword(s):  
Kinetic Equations ◽  
Velocity Space ◽  
Inverse Velocity

scholarly journals Inversion methods for fast-ion velocity-space tomography in fusion plasmas

2016 ◽  
Vol 58 (4) ◽  
pp. 045016 ◽  
Author(s):  
A S Jacobsen ◽  
L Stagner ◽  
M Salewski ◽  
B Geiger ◽  
W W Heidbrink ◽  
...  
Keyword(s):  
Velocity Space ◽  
Fusion Plasmas ◽  
Inversion Methods ◽  
Ion Velocity ◽  
Fast Ion

Discretization of the Boltzmann equation in velocity space using a Galerkin approach

2000 ◽  
Vol 129 (1-3) ◽  
pp. 91-99 ◽  
Author(s):  
Jonas Tölke ◽  
Manfred Krafczyk ◽  
Manuel Schulz ◽  
Ernst Rank
Keyword(s):  
Boltzmann Equation ◽  
Velocity Space ◽  
Galerkin Approach ◽  
The Boltzmann Equation

A self-organized reciprocal control method for multi-robot simultaneous coverage and tracking

2018 ◽  
Vol 38 (5) ◽  
pp. 689-698 ◽  
Author(s):  
Runfeng Chen ◽  
Jie Li ◽  
Lincheng Shen
Keyword(s):  
Control Method ◽  
Task Assignment ◽  
Decision Time ◽  
Velocity Space ◽  
Deadweight Loss ◽  
Traffic Surveillance ◽  
Content Type ◽  
Optimal Velocity ◽  
Service Environment ◽  
Self Organized

Purpose Multi-robots simultaneously coverage and tracking (SCAT) is the problem of simultaneously covering area and tracking targets, which is essential for many applications, such as delivery service, environment monitor, traffic surveillance, crime monitor, anti-terrorist mission and so on. The purpose of this paper is to improve the performance of detected target quantity, coverage rate and less deadweight loss by designing a self-organized method for multi-robots SCAT. Design/methodology/approach A self-organized reciprocal control method is proposed, coupling task assignment, tracking and covering, equipped with collision-avoiding ability naturally. First, SCAT problem is directly modeled as optimal reciprocal coverage velocity (ORCV) in velocity space. Second, the preferred velocity is generated by calculating the best velocity to the center of some robot detected targets. ORCV is given by adjusting the velocity relative to neighbor robots’ toward in optimal coverage velocity (OCV); it is proven that OCV is collision-free assembly. Third, some corresponding algorithms are designed for finding optimal velocity under two situations, such as no detected targets and empty ORCV. Findings The simulation results of two cases for security robots show that the proposed method has detected more targets with less deadweight loss and decision time and no collisions anytime. Originality/value In this paper, a self-organized reciprocal control method is proposed for multi-robots SCAT problem, which is modeled in velocity space directly, different to the traditional method modeling in configuration space. What is more, this method considers the reciprocal of robots that contributes to the better accomplishment of SCAT cooperatively.

scholarly journals Block-structured grids in full velocity space for Eulerian gyrokinetic simulations

2017 ◽  
Vol 215 ◽  
pp. 49-62 ◽  
Author(s):  
D. Jarema ◽  
H.J. Bungartz ◽  
T. Görler ◽  
F. Jenko ◽  
T. Neckel ◽  
...  
Keyword(s):  
Velocity Space ◽  
Structured Grids ◽  
Gyrokinetic Simulations ◽  
Block Structured
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