Wavelet Threshold Denoising and Pseudo-range Difference-Based Weighting for Indoor BLE Positioning

2021 ◽  
pp. 174-185
Author(s):  
Yang Dai ◽  
Jianqiang Wang
Keyword(s):  
Range Difference

scholarly journals Survival and pleurodesis outcome in patients with malignant pleural effusion – a systematic review

2021 ◽  
Vol 6 (1) ◽  
pp. 1-5
Author(s):  
Maged Hassan ◽  
Elinor Harriss ◽  
Rachel M. Mercer ◽  
Najib M. Rahman
Keyword(s):  
Systematic Review ◽  
Pleural Effusion ◽  
Survival Benefit ◽  
Malignant Pleural Effusion ◽  
Risk Of Bias ◽  
Common Condition ◽  
Survival Difference ◽  
Range Difference ◽  
Simple Drainage

Abstract Malignant pleural effusion (MPE) is a common condition that presents with progressive breathlessness. Long term solutions are often required due to recurrence of effusion after simple drainage. Pleurodesis is one of the main options resorted to for long term control of MPE. There is data to suggest there may be a survival benefit for patients with MPE who achieve successful pleurodesis. A systematic review was carried out to explore this correlation and results suggest that there could be a survival difference according to pleurodesis outcome in patients with MPE. Fifteen studies (reported in 13 papers) were included; 13 (86.6%) of the studies showed survival difference in favour of pleurodesis success. The median [interquartile range] difference in survival between the two groups among the different studies was five [3.5–5.8] months. Most of the included studies suffered moderate to severe risk of bias and, thus, large prospective studies of patients undergoing pleurodesis are required to ascertain this effect.

scholarly journals Investigating the Consistency of Uncalibrated Multispectral Lidar Vegetation Indices at Different Altitudes

2019 ◽  
Vol 11 (13) ◽  
pp. 1531 ◽  
Author(s):  
Maxim Okhrimenko ◽  
Chris Hopkinson
Keyword(s):  
Vegetation Indices ◽  
Atmospheric Correction ◽  
Spectral Ratios ◽  
Additional Information ◽  
Point Density ◽  
Range Difference ◽  
Spectral Vegetation Indices ◽  
The Stability ◽  
Considerable Range ◽  
Different Altitudes

Multi-spectral (ms) airborne light detection and ranging (lidar) data are increasingly used for mapping purposes. Geometric data are enriched by intensity digital numbers (DNs) and, by utilizing this additional information either directly, or in the form of active spectral vegetation indices (SVIs), enhancements in land cover classification and change monitoring are possible. In the case of SVIs, the indices should be calculated from reflectance values derived from intensity DNs after rigorous calibration. In practice, such calibration is often not possible, and SVIs calculated from intensity DNs are used. However, the consistency of such active ms lidar products is poorly understood. In this study, the authors reported on an ms lidar mission at three different altitudes above ground to investigate SVI consistency. The stability of two families of indices—spectral ratios and normalized differences—was compared. The need for atmospheric correction in case of considerable range difference was established. It was demonstrated that by selecting single returns (provided sufficient point density), it was possible to derive stable SVI products. Finally, a criterion was proposed for comparing different lidar acquisitions over vegetated areas.

scholarly journals On the statistical model of source localization based on Range Difference measurements

2017 ◽  
Vol 354 (15) ◽  
pp. 7183-7214 ◽  
Author(s):  
Marco Compagnoni ◽  
Roberto Notari ◽  
Fabio Antonacci ◽  
Augusto Sarti
Keyword(s):  
Statistical Model ◽  
Source Localization ◽  
Range Difference
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