Optimal smoothing based mapping process of road surface marking in urban canyon environment

2017 ◽  
Author(s):  
Chansoo Kim ◽  
Kichun Jo ◽  
Sungjin Cho ◽  
Myoungho Sunwoo
Keyword(s):  
Road Surface ◽  
Urban Canyon ◽  
Optimal Smoothing ◽  
Mapping Process ◽  
Surface Marking

scholarly journals The Improvement of Moisture Resistance and Organic Compatibility of SrAl2O4: Eu2+, Dy3+ Persistent Phosphors Coated with Silica–Polymer Hybrid Shell

Materials ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 426 ◽  
Author(s):  
Lei Lyu ◽  
Yuxian Chen ◽  
Liting Yu ◽  
Rui Li ◽  
Liu Zhang ◽  
...  
Keyword(s):  
Traffic Safety ◽  
Sol Gel ◽  
Chemical Precipitation ◽  
Road Surface ◽  
Moisture Resistance ◽  
Safety Hazards ◽  
Polymer Shell ◽  
Polymer Hybrid ◽  
Surface Marking ◽  
Luminescent Coatings

The existing road surface marking with poor visibility at night results in traffic safety hazards in insufficient lighting roads. This study aims to prepare the dedicated aluminate-based persistent phosphors considering the integrated pavement environment, as the first step to achieve the durable luminescent road surface marking. SrAl2O4: Eu2+, Dy3+ persistent phosphors coated with silica–polymer hybrid shell were prepared by chemical precipitation and sol-gel method to improve moisture resistance and organic compatibility. The optimum silane coupling agent type and dosage, the surfactant dosage, the optimum sodium silicate dosage, and the coating reaction time in silica shell and polymer shell coating were studied based on the moisture resistance test. The silica–polymer hybrid shell coating balances the organic compatibility and thermal stability as compared to the silica or polymer shell coating in the oil absorption test and thermogravimetric analysis. Ex-Em Spectra, XRD, and SEM method were used to characterize the persistent phosphors, indicating the preparation does not destroy the persistent phosphors. The outstanding durable properties of SrAl2O4: Eu2+, Dy3+ persistent phosphors coated with silica–polymer hybrid shell as shown in this research is crucial for its potential application in waterborne luminescent coatings of road surface marking.

Materials and Micro-Glass Beads for Road Surface Marking — Problems and Trends

2018 ◽  
Vol 761 (7) ◽  
pp. 28-30 ◽  
Author(s):  
V.N. SVEZHINSKY ◽  
◽  
S.A. MALYSHKIN ◽  
L.P. BESSONOVA ◽  
◽  
...  
Keyword(s):  
Glass Beads ◽  
Road Surface ◽  
Surface Marking

Bayesian removal of noise for increased sensitivity in vector pattern recognition lattice imaging of interfaces

1993 ◽  
Vol 51 ◽  
pp. 994-995
Author(s):  
L. Fei ◽  
P. Fraundorf
Keyword(s):  
Pattern Recognition ◽  
Perfect Crystal ◽  
Unit Cell ◽  
Ion Milling ◽  
Beam Radiation ◽  
Major Interest ◽  
Unit Cells ◽  
Mapping Process ◽  
Increased Sensitivity ◽  
Electron Microscopes

Interface structure is of major interest in microscopy. With high resolution transmission electron microscopes (TEMs) and scanning probe microscopes, it is possible to reveal structure of interfaces in unit cells, in some cases with atomic resolution. A. Ourmazd et al. proposed quantifying such observations by using vector pattern recognition to map chemical composition changes across the interface in TEM images with unit cell resolution. The sensitivity of the mapping process, however, is limited by the repeatability of unit cell images of perfect crystal, and hence by the amount of delocalized noise, e.g. due to ion milling or beam radiation damage. Bayesian removal of noise, based on statistical inference, can be used to reduce the amount of non-periodic noise in images after acquisition. The basic principle of Bayesian phase-model background subtraction, according to our previous study, is that the optimum (rms error minimizing strategy) Fourier phases of the noise can be obtained provided the amplitudes of the noise is given, while the noise amplitude can often be estimated from the image itself.

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