Results 71 to 80 of about 895,042 (230)
The Nature of Hypervelocity Stars and the Time between Their Formation and Ejection [PDF]
, 2012 We obtain Keck HIRES spectroscopy of HVS5, one of the fastest unbound stars in the Milky Way halo. We show that HVS5 is a 3.62 ± 0.11 M_☉ main-sequence B star at a distance of 50 ± 5 kpc.
Brown, Warren R. +3 more
core +2 more sources
Leida xuebao, 2016 In order to determine single-observer passive coherent locations using illuminators of opportunity, we propose a jointing angle and Time Difference Of Arrival (TDOA) Weighted Least Squares (WLS) location method.
Zhao Yongsheng +2 more
doaj +1 more source
Sensors, 2022 The localization of internet of things (IoT) nodes in indoor scenarios with strong multipath channel components is challenging. All methods using radio signals, such as received signal strength (RSS) or angle of arrival (AoA), are inherently prone to ...
Daniel Neunteufel +2 more
doaj +1 more source
Acoustic positioning and tracking in Portsmouth Harbour, New Hampshire [PDF]
, 2007 Portsmouth Harbor, New Hampshire, is frequently used as a testing area for multibeam and sidescan sonars, and is the location of numerous ground-truthing studies. Having the ability to accurately position underwater sensors is an important aspect of this
Huff, Lloyd C +5 more
core +2 more sources
Applied SciencesLocalizing a moving source by Time Difference of Arrival (TDOA) and Frequency Difference of Arrival (FDOA) commonly requires at least N+1 sensors in N-dimensional space to obtain more than N pairs of TDOAs and FDOAs, thereby establishing more than 2N ...
Xu Yang
doaj +1 more source
Optimal Sensor Deployment and Velocity Configuration With Hybrid TDOA and FDOA Measurements
IEEE Access, 2019 Source localization based on the hybrid time-difference-of-arrival (TDOA) and frequency-difference-of-arrival (FDOA) measurements from distributed sensors is an essential problem in wireless sensor networks (WSNs).
Weijia Wang +4 more
doaj +1 more source
Photon correlations in positron annihilation
, 2010 The two-photon positron annihilation density matrix is found to separate into a diagonal center of energy factor implying maximally entangled momenta, and a relative factor describing decay.
Isabelle Gauthier +3 more
core +1 more source
Normal Inverse Gaussian Approximation for Arrival Time Difference in Flow-Induced Molecular Communications [PDF]
, 2018 In this paper, we consider molecular communications in one-dimensional flow-induced diffusion channels with a perfectly absorbing receiver. In such channels, the random propagation delay until the molecules are absorbed follows an inverse Gaussian (IG ...
Efrosinin, Dmitry +2 more
core +2 more sources
A Basic Result on the Superposition of Arrival Processes in Deterministic Networks
, 2018 Time-Sensitive Networking (TSN) and Deterministic Networking (DetNet) are emerging standards to enable deterministic, delay-critical communication in such networks. This naturally (re-)calls attention to the network calculus theory (NC), since a rich set
Jiang, Yuming
core +1 more source
Detecting of Gunshots Direction Using TDOA (Time Difference of Arrival)
Emitor: Jurnal Teknik ElektroIn order to avoid shots being fired in undesirable areas, a device is required that can detect the origin of the shot so that the source of the bullet can be identified. This research was conducted to maintain the security and stability of a region.
Risdilah Mimma Untsa +4 more
doaj +1 more source