Results 11 to 20 of about 584,932 (288)
A Tandem Fluid Network with L\'evy Input in Heavy Traffic [PDF]
Queueing Systems, 2015 In this paper we study the stationary workload distribution of a fluid tandem queue in heavy traffic. We consider different types of L\'evy input, covering compound Poisson, $\alpha$-stable L\'evy motion (with ...
Boxma, Onno J. +2 more
core +22 more sources
Spatiotemporal dynamics of traffic bottlenecks yields an early signal of heavy congestions
Nature Communications, 2023 Heavy traffic jams are difficult to predict due to the complexity of traffic dynamics. Understanding the network dynamics of traffic bottlenecks can help avoid critical large traffic jams and improve overall traffic conditions.
Jinxiao Duan +6 more
doaj +2 more sources
Multi-Objective Aerodynamic Optimization of a High-Speed Train Head Shape Based on an Optimal Kriging Model [PDF]
Journal of Applied Fluid Mechanics, 2022 An optimal Kriging surrogate model based on a 5-fold cross-validation method and improved artificial fish swarm optimization is developed for improving the aerodynamic optimization efficiency of a high-speed train running in the open air.
Y. Yang, Z. He, Z. Shi, X. H. Xiong
doaj +1 more source
Crack Detection in Pavement Images Based on a Self- Adaptive Niche Algorithm
Journal of Applied Science and Engineering, 2021 This study focuses on optical image pavement damage detection instead of artificial detection in pavement maintenance. Based on the characteristics of cracks and combined with the niche theory, it proposes a dynamic adaptive curve extraction algorithm ...
Peng Bai +4 more
doaj +1 more source
Heavy metal concentrations in the outdoor and indoor air of high-traffic areas in Tehran, Iran [PDF]
Journal of Advances in Environmental Health Research, 2020 Tehran is a polluted metropolitan and the capital of Iran, where heavy traffic and excessive energy consumption (especially gasoline) are the major sources of heavy metal emissions.
Azam Mehdipour +3 more
doaj +1 more source
Geology, Ecology, and Landscapes, 2022 Haphazard and noisy traffic in congested and densely populated old cities has become a challenge for the environmental and transportation engineers to provide better means of transportation with raised quality of life and environment.
Sehrish Latif +2 more
doaj +1 more source
An Impact of Traffic Characteristics on Crash Frequency [PDF]
E3S Web of Conferences, 2023 With the development of roads, modes of transportation were also developed, and increasing numbers of those modes and routes were needed. This increase brought into focus many problems of the highway system.
Al-Nuaimi Atheer, Jameel Abeer K.
doaj +1 more source
Transform Methods for Heavy-Traffic Analysis [PDF]
Stochastic Systems, 2020 The drift method was recently developed to study queuing systems in steady state. It was used successfully to obtain bounds on the moments of the scaled queue lengths that are asymptotically tight in heavy traffic and in a wide variety of systems, including generalized switches, input-queued switches, bandwidth-sharing networks, and so on.
Daniela Hurtado-Lange +1 more
openaire +3 more sources
Customer-Server Population Dynamics in Heavy Traffic [PDF]
Stochastic Systems, 2022 We study a many-server queueing model with server vacations, where the population size dynamics of servers and customers are coupled: a server may leave for vacation only when no customers await, and the capacity available to customers is directly affected by the number of servers on vacation.
Rami Atar +2 more
openaire +3 more sources
On the transition from heavy traffic to heavy tails for the M/G/1 queue: The regularly varying case [PDF]
, 2011 Two of the most popular approximations for the distribution of the steady-state waiting time, $W_{\infty}$, of the M/G/1 queue are the so-called heavy-traffic approximation and heavy-tailed asymptotic, respectively.
Blanchet, Jose +2 more
core +1 more source