Results 51 to 60 of about 263,145 (166)

A Proposed Algorithm Based on Variance to Effectively Estimate Crack Source Localization in Solids

Sensors
Acoustic emissions (AEs) are produced by elastic waves generated by damage in solid materials. AE sensors have been widely used in several fields as a promising tool to analyze damage mechanisms such as cracking, dislocation movement, etc.
Young-Chul Choi, Byunyoung Chung, Doyun Jung   +2 more
doaj   +1 more source

Dilution of Precision in Positioning Systems Using Both Angle of Arrival and Time of Arrival Measurements

IEEE Access, 2020
Dilution of precision (DOP) is a value that can describe the effect on the relationship between measurement error and position determination error.
Binghao Li, Kai Zhao, Xuesong Shen
doaj   +1 more source

On the identification of a distribution for the arrivals to a queueing system: an application from bank data

Croatian Operational Research Review
Queues are an integral part of life. The literature available concentrates on Poisson arrival and exponential service time. The present paper focuses on statistical inference on the parameters of queueing models. The work is data driven.
Ashwini K, Sumathi Prabhu
doaj   +1 more source

Arrival Time from Hamiltonian with Non-Hermitian Boundary Term

Universe
In this study, we developed a new method for finding the quantum probability density of arrival at the detector. The evolution of the quantum state restricted to the region outside of the detector is described by a restricted Hamiltonian that contains a ...
Tajron Jurić, Hrvoje Nikolić
doaj   +1 more source

THE TOHOKU TSUNAMI OF 11 MARCH 2011 AS RECORDED ON THE RUSSIAN FAR EAST [PDF]

Science of Tsunami Hazards, 2012
The source region of the catastrophic Tohoku tsunami of 11 March 2011 was near the Russian Far East, thus a warning was issued for threatened coasts of the Kuril Islands and Kamchatka.
G. V. Shevchenko, T. N. Ivelskaya
doaj  

Two Stages of Arrival Aircraft: Influencing Factors and Prediction of Integrated Arrival Time

Aerospace
To enhance the accuracy and real-time capability of estimated in-block time (EIBT) predictions at airports, this study proposes a two-stage integrated prediction method.
Xiaowei Tang, Mengfan Ye, Jiaqi Wu, Shengrun Zhang   +3 more
doaj   +1 more source

Study on joint passive localization using time difference of arrival and frequency difference of arrival to improve the accuracy of four-satellite localization

Advances in Mechanical Engineering, 2017
In order to reduce the influence of time-difference-of-arrival measurement error on localization accuracy of time-difference-of-arrival-based four-satellite localization, we first introduce the frequency-difference-of-arrival information to the existing ...
Guo Xiansheng, Lu Haoran, Zhang Yan, Zeng Botao, Guo Yebo   +4 more
doaj   +1 more source

Phase Difference of Arrival Aided Downlink Time Difference of Arrival Ultra-Wide Band Positioning System

IEEE Access
Currently there is a growing demand for accurate and reliable positioning indoors or in other environments, where Global Navigation Satellite Systems (GNSS) are unavailable.
Josef Krska, Christian Gentner, Vaclav Navratil   +2 more
doaj   +1 more source

Effects of Migration Distance on Shifting Migratory and Breeding Phenology in Waders

Ecology and Evolution
Shifts in phenology are widely reported across taxa and, among migratory birds, advancing timing of breeding has occurred predominantly in short‐distance migrants.
Verónica Méndez, José A. Alves, Jennifer A. Gill, Böðvar Þórisson, Camilo Carneiro, Aldís E. Pálsdóttir, Sölvi R. Vignisson, Gunnar Tómasson, Tómas G. Gunnarsson   +8 more
doaj   +1 more source

Reliable Denoising Strategy to Enhance the Accuracy of Arrival Time Picking of Noisy Microseismic Recordings. [PDF]

Sensors (Basel), 2023
Zhang X, Li H, Rong W.
europepmc   +1 more source