Results 21 to 30 of about 20,101,928 (317)

GMDNet: A Graph-Based Mixture Density Network for Estimating Packages' Multimodal Travel Time Distribution

open access: yesAAAI Conference on Artificial Intelligence, 2023
In the logistics network, accurately estimating packages' Travel Time Distribution (TTD) given the routes greatly benefits both consumers and platforms.
Xiaowei Mao   +9 more
semanticscholar   +1 more source

On the value of distribution tail in the valuation of travel time variability [PDF]

open access: yesTransportation Research Part E: Logistics and Transportation Review, 2022
Extensive empirical studies show that the long distribution tail of travel time and the corresponding unexpected delay can have much more serious consequences than expected or moderate delay.
Zhao-Qi Zang   +3 more
semanticscholar   +1 more source

Time Travel [PDF]

open access: yes, 2022
Philosophy of time travel is a fast-growing branch of philosophy, encompassing issues from metaphysics and epistemology through to the philosophy of science and philosophy of action.

core   +1 more source

The Role of Anomalous Transport in Long‐Term, Stream Water Chemistry Variability

open access: yesGeophysical Research Letters, 2023
We investigate the occurrence of anomalous (non‐Fickian) transport in an hydrological catchment system at kilometer scales and over a 36‐year period. Using spectral analysis, we examine the fluctuation scaling of long‐term time series measurements of a ...
Marco Dentz   +3 more
doaj   +1 more source

COVID-19, Travel Time Reliability, and the Emergence of a Double-Humped Peak Period [PDF]

open access: yesFindings, 2021
This paper explores the travel time variance, occupancy heterogeneity level, and average network traffic flow of Minneapolis-St. Paul freeway network and determines the time-lag relationship between travel time variance and the spatio-temporal ...
Yang Gao, David Levinson
doaj   +2 more sources

Modeling the Distribution of Human Mobility Metrics with Online Car-Hailing Data—An Empirical Study in Xi’an, China

open access: yesISPRS International Journal of Geo-Information, 2021
Modeling the distribution of daily and hourly human mobility metrics is beneficial for studying underlying human travel patterns. In previous studies, some probability distribution functions were employed in order to establish a base for human mobility ...
Chaoyang Shi   +3 more
doaj   +1 more source

Estimation and Reliability Research of Post-Earthquake Traffic Travel Time Distribution Based on Floating Car Data

open access: yesApplied Sciences, 2022
To carry out the estimation and reliability research of post-earthquake traffic travel time, which has the great influence for efficient allocation of relief materials. By analyzing the relationship among floating vehicle trajectory, target path and road
Yongyi Li   +3 more
doaj   +1 more source

Bayesian Mixture Model to Estimate Freeway Travel Time under Low-Frequency Probe Data

open access: yesApplied Sciences, 2022
This study develops a novel estimation method under low-frequency probe data using the Bayesian approach. Given the challenges in estimating travel time under low-frequency probe data and prior distribution of the parameters in a traditional Bayesian ...
Hyungjoo Kim, Lanhang Ye
doaj   +1 more source

From average travel time budgets to daily travel time distributions

open access: yesTransportation Research Record: Journal of the Transportation Research Board, 2006
An analysis of three travel surveys (in Belgium, France, and Great Britain) is used to investigate two conjectures by Kölbl and Helbing. The first one suggests a relation between mode choice and human energy expenditure for travel, which is assumed to be constant in time and space.
Hubert, Jena-Paul, Toint, Philippe
openaire   +3 more sources

Estimation of Travel Time Distributions in Urban Road Networks Using Low-Frequency Floating Car Data

open access: yesISPRS International Journal of Geo-Information, 2017
Travel times in urban road networks are highly stochastic. However, most existing travel time estimation methods only estimate the mean travel times, while ignoring travel time variances. To this end, this paper proposes a robust travel time distribution
Chaoyang Shi, Bi Yu Chen, Qingquan Li
doaj   +1 more source

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