Results 21 to 30 of about 339,040 (317)
Correlation between RF signal first-arrival and minimum spectral transit time in cancellous bone
, 2023 Measurement of the singular ultrasound velocity of a homogeneous sample may be calculated by division of its thickness and propagation transit time, generally utilizing a detection criterion of an RF signal's first-arrival.
Langton, Christian +3 more
core +1 more source
Track mobile devices in a cellular mobile communications system
ACI Avances en Ciencias e Ingenierías, 2009 Este artículo trata sobre el uso de algoritmos estadísticos en la estimación de señales de una red celular y su aplicación al posicionamiento y seguimiento de dispositivos móvil, con la finalidad de conseguir que la red esté en capacidad de proporcionar ...
Santiago Silva, René P. Játiva E.
doaj +1 more source
A Two-Stage Method for Short-Wave Target Localization Using DOA and TDOA Measurements
IEEE Access, 2023 The ionosphere can make the short-wave source localization problem further non-linear, leading to a complicated solution process. This paper proposed a coordinated positioning algorithm based on the ionospheric virtual height (IVH) model to jointly ...
Linqiang Jiang +4 more
doaj +1 more source
Confined Quantum Time of Arrivals [PDF]
Physical Review Letters, 2004 We show that formulating the quantum time of arrival problem in a segment of the real line suggests rephrasing the quantum time of arrival problem to finding states that evolve to unitarily collapse at a given point at a definite time. For the spatially confined particle, we show that the problem admits a solution in the form of an eigenvalue problem ...
Galapon, Eric A. +2 more
openaire +3 more sources
Research of underground positioning algorithm based on DOA and TDOA
Gong-kuang zidonghua, 2013 In view of problems that current underground positioning system is sensitive to environmental change and has low positioning accuracy, the paper introduced an underground positioning algorithm based on DOA and TDOA. The algorithm takes advantages of high
ZHAI Yan-rong +5 more
doaj +1 more source
Optimal Passive Source Localization for Acoustic Emissions
Entropy, 2021 Acoustic emission is a non-destructive testing method where sensors monitor an area of a structure to detect and localize passive sources of elastic waves such as expanding cracks.
Carlos A. Prete +2 more
doaj +1 more source
predation-arrival-time: First release
, 2016 <p>This is the first release of code for the model described in 'Predation can select for later and more synchronous arrival times in migrating species' by Harts, Anna M., Kristensen, Nadiah P., and Kokko, Hanna.</p ...
Nadiah Kristensen
core +1 more source
Inventions, 2021 The problem of localization of nodes of a wireless sensor network placed in different physical media (anchor nodes above ground and sensor nodes underground) is addressed in this article.
Herman Sahota, Ratnesh Kumar
doaj +1 more source
A Comprehensive Survey on Short-Distance Localization of UAVs
DronesThe localization of Unmanned Aerial Vehicles (UAVs) is a critical area of research, particularly in applications requiring high accuracy and reliability in Global Positioning System (GPS)-denied environments.
Luka Kramarić +3 more
doaj +1 more source
Acoustic Source Localization in Metal Plates Using BP Neural Network
Metals, 2023 This study introduces a methodology for detecting the location of signal sources within a metal plate using machine learning. In particular, the Back Propagation (BP) neural network is used.
Yingqi Huang +3 more
doaj +1 more source