Results 1 to 10 of about 68,289 (259)

Critical and steady-state characteristics of delay propagation in an airport network. [PDF]

PLoS ONE, 2023
In this work, we established a density equation for delayed airports to investigate the horizontal propagation mechanism of delays among airports in an airport network.
Hong-Guang Yao, Hang Zhang
doaj   +2 more sources

ELoran Propagation Delay Prediction Model Based on a BP Neural Network for a Complex Meteorological Environment

Sensors, 2023
The core of eLoran ground-based timing navigation systems is the accurate measurement of groundwave propagation delay. However, meteorological changes will disturb the conductive characteristic factors along the groundwave propagation path, especially ...
Shiyao Liu, Wei Guo, Yu Hua, Wudian Kou
doaj   +3 more sources

Study on Delay Propagation Relations Among Airports Based on Transfer Entropy

IEEE Access, 2020
To understand the mechanism of delay propagation from the perspective of multiple airports, constructing delay propagation relation (DPR) networks among airports is a novel analysis method.
Yinhong Xiao, Yaoshuai Zhao, Ge Wu, Yizhen Jing   +3 more
doaj   +3 more sources

A Comparative Analysis of Delay Propagation on Departure and Arrival Flights for a Chinese Case Study

Aerospace, 2021
In recent years, flight delay costs the air transportation industry millions of dollars and has become a systematic problem. Understanding the behavior of flight delay is thus critical.
Zhe Zheng, Wenbin Wei, Minghua Hu
doaj   +3 more sources

Delay Correction Method Based on VLF Timing Signal Phase Variation Model [PDF]

Sensors
Positioning, navigation, and timing (PNT) services require stable time transfer, but satellite-based PNT signals are vulnerable to interference, attenuation, and limited availability in constrained environments. Very-low-frequency (VLF) signals propagate
Xinze Ma, Wenhe Yan, Zhaopeng Hu, Jiangbin Yuan, Yu Hua, Shifeng Li   +5 more
doaj   +2 more sources

A Review of Research on Flight Delay Propagation: Current Situation and Prospect

Journal of Advanced Transportation
The correlation between flight routes makes the initial delays easy to cause chain delays of downstream airports, forming a large area of delays. Studying delay propagation can block its propagation path and alleviate large-scale delay problems.
N. Li, H. G. Yao
doaj   +2 more sources

Mitochondria delay action potential propagation

Communications Biology
The internal resistance of axons to ionic current flow determines action potential conduction velocity. Although mitochondria support axonal function, axons have been modeled as organelle-free cables, and mitochondrial impact on conduction velocity ...
Ann M. Castelfranco, Pepe Alcami
doaj   +4 more sources

Analyzing the Impacts of Inbound Flight Delay Trends on Departure Delays Due to Connection Passengers Using a Hybrid RNN Model

Mathematics, 2023
Some delay patterns are correlated to historical performance and can reflect the trend of delays in future flights. A typical example is the delay from an earlier inbound flight causing delayed departure of a connecting and downstream outbound flight ...
Tsegai O. Yhdego, An-Tsun Wei, Gordon Erlebacher, Hui Wang, Miguel G. Tejada   +4 more
doaj   +1 more source

A Queuing Network Model of a Multi-Airport System Based on Point-Wise Stationary Approximation

Aerospace, 2022
A multiple-airport system (MAS) consists of more than two airports in a metropolitan area under a large block of terminal airspace that is managed by one or two air traffic control units. When the capacity of an airport or of the terminal airspace drops,
Xifan Zhao, Yanjun Wang, Lishuai Li, Daniel Delahaye   +3 more
doaj   +1 more source

Minimum propagation delays in VLSI [PDF]

IEEE Journal of Solid-State Circuits, 1982
Conditions are outlined under which propagation delays in VLSI circuits can be achieved that are logarithmic in the wire lengths. These conditions are imposed by area requirements and the velocity of light.
Mead, Carver, Rem, Martin
openaire   +5 more sources