Results 1 to 10 of about 65,792 (310)

LOGISTICS AND EFFICIENCY OF HEAVY TRAFFIC

International Journal of Advanced Studies
Background. The article is devoted to the study of the organization of the heavyweight movement. The relevance of the topic is related to the steady increase in the average weight of freight trains operating on heavily loaded routes of Russian railways ...
Oksana D. Pokrovskaya, Oleg V. Shugaev
doaj   +4 more sources

Do Heavy Vehicles Always Have a Negative Effect on Traffic Flow?

Applied Sciences, 2021
The purpose of this study is to analyze the effect of heavy vehicles on traffic flow on a two-lane highway. To achieve this goal, data was obtained from piezosensors on the Seoul–Chuncheon Expressway.
Chang-Gyun Roh, Hyeonmyeong Jeon, Bongsoo Son   +2 more
doaj   +3 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, Linfeng Chen, Songrong Jiang, Yu Gong, Qishen Li   +4 more
doaj   +1 more source

Impact Assessment of Traffic Noise in a Densely Populated Industrial City, Faisalabad Pakistan Using Geostatistical Approach and Development of Sustainable Transportation System Framework

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, Haroon Rashid, Abdul Nasir   +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

Interacting queues in heavy traffic [PDF]

Queueing Systems, 2010
The authors consider a system of parallel queues with Poisson arrivals and exponentially distributed service requirements. The various queues are coupled through their service rates, causing a complex dynamic interaction. Specifically, the system consists of one primary queue and several secondary queues whose service rates depend on whether the ...
J.A. Morrison, S.C. Borst (Sem)
openaire   +2 more sources

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, Mojgan Zaeimdar, Mohammad Sadegh Sekhavatjou, Sayed Ali Jozi   +3 more
doaj   +1 more source

Gaussian queues in light and heavy traffic [PDF]

Queueing Systems, 2012
In this paper we investigate Gaussian queues in the light-traffic and in the heavy-traffic regime. The setting considered is that of a centered Gaussian process $X\equiv\{X(t):t\in\mathbb R\}$ with stationary increments and variance function $σ^2_X(\cdot)$, equipped with a deterministic drift $c>0$, reflected at 0: \[Q_X^{(c)}(t)=\sup_ ...
Krzysztof Debicki, K. M. Kosinski, Michel Mandjes   +2 more
openaire   +4 more sources

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, Siva Theja Maguluri   +1 more
openaire   +3 more sources