Remote Sensing, 2022 Forest logging detection is important for sustainable forest management. The traditional optical satellite images with visible and near-infrared bands showed the ability to identify intensive timber logging.
Yue Hu +3 more
doaj +1 more source
Multi-Model Estimation of Forest Canopy Closure by Using Red Edge Bands Based on Sentinel-2 Images [PDF]
Forests, 2021 In remote sensing, red edge bands are important indicators for monitoring vegetation growth. To examine the application potential of red edge bands in forest canopy closure estimation, three types of commonly used models—empirical statistical models (multiple stepwise regression (MSR)), machine learning models (back propagation neural network (BPNN ...
Yiying Hua, Xuesheng Zhao
openaire +1 more source
Synthesis and properties of Co-doped titanate nanotubes and their optical sensitization with methylene blue [PDF]
, 2013 Here we report on a novel chemical route to synthesize homogenous cobalt doped titanate nanotubes (CoTNT), using an amorphous Co-doped precursor. The influence of the synthesis temperature, autoclave dwell time and metal doping on the structural and ...
Ferreira, V. C. +3 more
core +2 more sources
Early Dust Formation and a Massive Progenitor for SN 2011ja? [PDF]
, 2015 SN 2011ja was a bright (I = -18.3) Type II supernova occurring in the nearby edge on spiral galaxy NGC 4945. Flat-topped and multi-peaked H-alpha and H-beta spectral emission lines appear between 64 - 84 days post-explosion, indicating interaction with a
Andrews, J. E. +8 more
core +4 more sources
Influence of metal (Ag, Cd, Cu)-doping on the optical properties of ZnO nanopowder: Variation of band gap [PDF]
شیمی کاربردی روز, 2013 Metal doped ZnO (MZO, metal = Ag, Cd, Cu) with different metal ion doped concentrations were synthesized by sol-gel method. The structural and optical properties were characterized by UVâVis spectroscopy and Fourier transform infrared (FT-IR).
Bordbar Maryam +3 more
doaj +1 more source
Emission bands of nitrogen-implantation induced luminescent centers in ZnO crystals: experiment and theory [PDF]
, 2012 High quality ZnO crystals with the sharp band-edge excitonic emission and very weak green emission were implanted by nitrogen ions. An additional red emission band was observed in the as-implanted ZnO crystal and investigated as a function of temperature.
Anwand, W +5 more
core +1 more source
Frontiers in Remote Sensing, 2021 Rice cultivation is one of the largest users of the world’s freshwater resources. The contribution of remote sensing observations for identifying the conditions under which rice is cultivated, particularly throughout the growing season, can be ...
Isabel Pedroso de Lima +5 more
doaj +1 more source
Detection of irrigation inhomogeneities in an olive grove using the NDRE vegetation index obtained from UAV images [PDF]
, 2019 We have developed a simple photogrammetric method to identify heterogeneous areas of irrigated olive groves and vineyard crops using a commercial multispectral camera mounted on an unmanned aerial vehicle (UAV).
Jorge Sánchez, Juan +2 more
core +2 more sources
Recognition of Banana Fusarium Wilt Based on UAV Remote Sensing
Remote Sensing, 2020 Fusarium wilt (Panama disease) of banana currently threatens banana production areas worldwide. Timely monitoring of Fusarium wilt disease is important for the disease treatment and adjustment of banana planting methods.
Huichun Ye +7 more
doaj +1 more source
COMPARING BROAD-BAND AND RED EDGE-BASED SPECTRAL VEGETATION INDICES TO ESTIMATE NITROGEN CONCENTRATION OF CROPS USING CASI DATA [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016 In recent decades, many spectral vegetation indices (SVIs) have been proposed to estimate the leaf nitrogen concentration (LNC) of crops. However, most of these indices were based on the field hyperspectral reflectance.
Y. Wang +5 more
doaj +1 more source