Radar vegetation indices for monitoring surface vegetation: Developments, challenges, and trends

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 945, P. 173974 - 173974

Published: June 17, 2024

Language: Английский

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Estimation of Forest Aboveground Biomass in North China Based on Landsat Data and Stand Features

Forests, Journal Year: 2025, Volume and Issue: 16(3), P. 384 - 384

Published: Feb. 20, 2025

The forests in China’s temperate semi-arid region play a significant role water conservation, carbon storage, and biodiversity protection. An accurate estimation of their aboveground biomass (AGB) is crucial for assessing key ecological characteristics, such as forest storage capacity, biodiversity, productivity. This provides scientific basis resource management conservation this region. In study, we extract 17 features related to the dominant species (Larix gmelinii Betula platyphylla), including 7 vegetation indices derived from remote sensing data, 14 satellite bands, 3 site characteristics. We then analyze correlations between AGB these features. compare performance models using linear regression (LR), polynomial (PR), ridge (RR), Support Vector Regression (SVR), Extreme Gradient Boosting (XGBoost), random (RFR). results show that Larix gmelinii, Landsat 8 bands TM4 TM7 have greater degree correlation with than other features, while platyphylla, TM3 AGB, elevation has weaker AGB. Although (LR) demonstrates certain advantages estimation, particularly when values range 40 70 t/ha, RFR outperforms overall performance, accuracies reaching 85% platyphylla 89% gmelinii. study reveals both environmental characteristics may significantly influence selection choice algorithm model optimization critical. innovatively extracts forests, analyses relationships factors, optimizes advanced techniques, offering method can be applied regions well.

Language: Английский

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Dual-Polarized Metasurface-Integrated Antenna for Integrated Imaging of LWIR Camera and SAR

Micromachines, Journal Year: 2025, Volume and Issue: 16(2), P. 202 - 202

Published: Feb. 10, 2025

The integrated imaging of LWIR cameras and SAR is one the important directions multi-sensor integration. In order to reduce structural complexity SAR-integrated antenna, a dual-polarized metasurface-integrated antenna (MIA) designed in this paper. It composed microwave metasurface an optical metalens, metalens embedded center antenna. MIA uses powerful electromagnetic wave control ability simplify signal transmission paths number devices. At same time, expand function MIA, based on principle metasurface, dual-linearly polarized dual-circularly MIAs are simulated, respectively. results show that has good performance. This paper provides new scheme for system with simple structure, diverse functions easy

Language: Английский

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A marine oil spill detection framework considering special disturbances using Sentinel-1 data in the Suez Canal

Marine Pollution Bulletin, Journal Year: 2024, Volume and Issue: 208, P. 117012 - 117012

Published: Sept. 25, 2024

Language: Английский

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