Results 1 to 10 of about 1,169,905 (342)

UWB Indoor Localization Based on Artificial Rabbit Optimization Algorithm and BP Neural Network

Biomimetics
In the field of ultra-wideband (UWB) indoor localization, traditional backpropagation neural networks (BPNNs) are limited by their susceptibility to local minima, which restricts their ability to achieve global optimization.
Chaochuan Jia, Can Tao, Ting Yang, Maosheng Fu, Xiancun Zhou, Zhendong Huang   +5 more
doaj   +1 more source

A Single-Shot Non-Line-of-Sight Range-Finder

Sensors, 2019
The ability to locate a target around a corner is crucial in situations where it is impractical or unsafe to physically move around the obstruction. However, current techniques are limited to long acquisition times as they rely on single-photon counting ...
James Brooks, Daniele Faccio
doaj   +1 more source

Understanding the Geometry of Astrophysical Magnetic Fields

, 2009
Faraday rotation measurements have provided an invaluable technique with which to measure the properties of astrophysical magnetized plasmas. Unfortunately, typical observations provide information only about the density-weighted average of the magnetic ...
Agol, Avery E. Broderick, Bahcall, Bastian, Bjornsson, Broderick, Budden, Budden, Crutcher, Falcke, Ghez, Gillessen, Ginzburg, Han, Jorstad, Kharb, Lacki, Lang, LaRosa, Law, Lister, Lister, Lister, Lister, Loeb, Macquart, Manchester, Mancuso, Marrone, Porcas, Quataert, Roger D. Blandford, Taylor, Taylor, Taylor, Thompson, Udomprasert, Uyaniker, Wilson, Yuan, Yusef-Zadeh, Zavala, Zavala, Zheleznyakov, Zheleznyakov   +44 more
core   +1 more source

Unusually Weak Diffuse Interstellar Bands toward HD 62542 [PDF]

, 2001
As part of an extensive survey of diffuse interstellar bands (DIBs), we have obtained optical spectra of the moderately reddened B5V star HD 62542, which is known to have an unusual UV extinction curve of the type usually identified with dark clouds. The
Adamson A. J., Benjamin J. McCall, Cami J., Daniel E. Welty, Donald G. York, Ehrenfreund P., Gredel R., Gredel R., Gredel R., Heger M. L., Jenniskens P., Jenniskens P., Jenniskens P., Julie Thorburn, Kerr T. H., Krelowski J., L. M. Hobbs, Leger A., Paule Sonnentrucker, Sarre P. J., Snow T. P., Snow T. P., Sonnentrucker P., Sonnentrucker P., Theodore P. Snow, van der Zwet G. P., Walker D. D.   +26 more
core   +3 more sources

Improved Kalman filter indoor positioning algorithm based on CHAN

Tongxin xuebao, 2023
Due to the raising complexity of the indoor environment, the influence of the non-line-of-sight error is gradually increasing in indoor positioning.How to reduce the non-line-of-sight error in the indoor positioning environment is particularly ...
Rui JIANG, Yue YU, Youyun XU, Xiaoming WANG, Dapeng LI   +4 more
doaj   +2 more sources

NBursts: Simultaneous Extraction of Internal Kinematics and Parametrized SFH from Integrated Light Spectra

, 2007
We present a novel approach for simultaneous extraction of stellar population parameters and internal kinematics from the spectra integrated along a line of sight.
Chilingarian, Igor, Koleva, Mina, Prugniel, Philippe, Sil'chenko, Olga   +3 more
core   +1 more source

New Insights on Interstellar Gas-Phase Iron [PDF]

, 2007
In this paper, we report on the gas-phase abundance of singly-ionized iron (Fe II) for 51 lines of sight, using data from the Far Ultraviolet Spectroscopic Explorer (FUSE).
Adam G. Jensen, Aiello S., de Boer K. S., Garmany C. D., Gredel R., Gredel R., Jensen A. G., Neckel T., Snow T. P., Snow T. P., Theodore P. Snow   +10 more
core   +1 more source

Position and Orientation Estimation through Millimeter Wave MIMO in 5G Systems [PDF]

, 2017
Millimeter wave signals and large antenna arrays are considered enabling technologies for future 5G networks. While their benefits for achieving high-data rate communications are well-known, their potential advantages for accurate positioning are largely
Destino, Giuseppe, Garcia, Gabriel E., Seco-Granados, Gonzalo, Shahmansoori, Arash, Wymeersch, Henk   +4 more
core   +3 more sources

A Method for Deriving Accurate Gas-Phase Abundances for the Multiphase Interstellar Galactic Halo

, 2005
We describe a new method for determining total gas-phase abundances for the Galactic ISM with minimal ionization uncertainties. For sight lines toward globular clusters containing both UV-bright stars and radio pulsars, one can measure column densities ...
Howk, J. Christopher, Savage, Blair D., Sembach, Kenneth R.   +2 more
core   +1 more source

Fast Back-Projection for Non-Line of Sight Reconstruction [PDF]

, 2017
Recent works have demonstrated non-line of sight (NLOS) reconstruction by using the time-resolved signal frommultiply scattered light. These works combine ultrafast imaging systems with computation, which back-projects the recorded space-time signal to ...
Arellano, Victor, Gutierrez, Diego, Jarabo, Adrian   +2 more
core   +3 more sources