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Showing 201 - 220 results of 431 for search 'spectral composition (method OR methods)', query time: 0.12s Refine Results
  1. 201

    Integration of FTIR Spectroscopy, Volatile Compound Profiling, and Chemometric Techniques for Advanced Geographical and Varietal Analysis of Moroccan Eucalyptus Essential Oils by Aimen El Orche, Abdennacer El Mrabet, Amal Ait Haj Said, Soumaya Mousannif, Omar Elhamdaoui, Siddique Akber Ansari, Hamad M. Alkahtani, Shoeb Anwar Ansari, Ibrahim Sbai El Otmani, Mustapha Bouatia

    Published 2024-11-01
    “…This study aims to develop a reliable method for identifying the geographical origin and variety of eucalyptus oil samples through the application of advanced analytical techniques combined with chemometric methods. …”
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  4. 204

    Land cover changes in grassland landscapes: combining enhanced Landsat data composition, LandTrendr, and machine learning classification in google earth engine with MLP-ANN scenari... by Cecilia Parracciani, Daniela Gigante, Onisimo Mutanga, Stefania Bonafoni, Marco Vizzari

    Published 2024-12-01
    “…The LandTrendr (LT) algorithm was used in GEE to collect ground control points in no-change areas automatically. We used a method based on Multilayer Perceptron-Artificial Neural Networks (MLP-ANNs) to forecast 2040 land cover. …”
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  5. 205

    Heavy Metals in Glaciers and River Water of the Basin of the Bezengi Cherek River During Intense Graciation Degradation by A. M. Kerimov, O. А. Kurasheva

    Published 2022-10-01
    “…The determination of HM content in ice samples and river waters was carried out from 2003 to 2010 at the High Mountain Geophysical Institute by the method of emission spectral analysis. Sample analysis 2012–2021 were produced by the atomic absorption method on an MGA-915 spectrometer.Results and discussion. …”
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  6. 206
  7. 207

    Forensic Analysis of Marijuana: Approaches to Establishing Belonging to Previously Separated Plant Mass by A. N. Khokh, P. S. Voskanyan, A. A. Petrosyan

    Published 2025-01-01
    “…The possibility of interpreting spectral data using discriminant analysis of projections on latent structures is shown. …”
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  8. 208

    Inter-annual changes and growth trends mapping of mangrove using Landsat time series imagery by Xiaohui Huang, Yingchun Fu, Hu Ding, Guoan Tang, Peifeng Ma, Liangyun Liu, Yufei Xue, Shuting Wu, Ye Chen

    Published 2025-12-01
    “…In this study, a novel mangrove index, named the Composite Mangrove Index (CMI), was developed to map and assess the growth trends of mangroves, based on the truth that the spectral-temporal features of mangrove wetland environment related to greenness, moisture, and bare soil. …”
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  9. 209

    National-scale mapping topsoil organic carbon of cropland in China using multitemporal Sentinel-2 images by Jie Xue, Xianglin Zhang, Songchao Chen, Zhongxing Chen, Rui Lu, Feng Liu, Bas van Wesemael, Zhou Shi

    Published 2025-04-01
    “…First, a new time-series bare soil extraction method, the Two-Dimensional Bare Soil Separation Algorithm, was applied, utilizing Sentinel-2 images from 2018 to 2022 to generate a continuous spectral reflectance composite. …”
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    Article
  10. 210

    Synthesis of novel titania nanoparticles using corn silky hair fibres and their role in developing a smart restorative material in dentistry by Afsheen Mansoor, Emaan Mansoor, Ezza Mansoor, Efrah Mansoor, Atta Ullah Shah, Uzma Asjid, João Filipe Brochado Martins, Sami Ullah Khan, Paulo J. Palma

    Published 2025-01-01
    “…The main objective of this study was to synthesise cost-effective titania nanoparticles (TiO₂ NPs) from biowaste corn silky hair fibre. Methods: The titania nanoparticles (TiO₂ NPs) were characterised through x-ray diffraction; scanning electron microscopy; energy-dispersive spectroscopy; Fourier transform spectroscopy, and atomic force microscopy, as well as dynamic light-scattering to identify their phases, morphologies, dimensions, and chemical compositions. …”
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  11. 211
  12. 212

    Prediction Model of the Key Components for Lodging Resistance in Rapeseed Stalk Using Near-Infrared Reflectance Spectroscopy (NIRS) by Jie Kuai, Shengyong Xu, Cheng Guo, Kun Lu, Yaoze Feng, Guangsheng Zhou

    Published 2019-01-01
    “…By taking the advantage of NIRS, we developed a rapid method to determine the content of six key composition without crushing the stalk. …”
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  13. 213

    THE EFFECTIVE MEDIUM THEORY AS A TOOL FOR ANALYZING THE OPTICAL PROPERTIES OF NANOCOMPOSITES by A. N. Yurasov, M. M. Yashin

    Published 2018-04-01
    “…A good qualitative and quantitative agreement of the experimental and model spectral dependences was observed. The dielectric permittivity values for Cu + Si nanocomposite were calculated by the Maxwell-Garnett method. …”
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  14. 214

    Avocado fruit sorting by hyperspectral images by D. A. Metlenkin, R. A. Platova, Yu. T. Platov, O. V. Fedoseenko, O. V. Sadkova

    Published 2023-04-01
    “…Calibration models for determination of moisture and dry matter of avocado fruits were built based on the data of moisture measurement and hyperspectral images. The matrix of spectral data was formed by two methods: random selection of spectral signatures of HSIs from the whole surface of fruits or the image surface of HSIs of fruits (initial HSIs) as a region of interest (ROI). …”
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  15. 215

    Laser-induced Breakdown Spectroscopy Based on Pre-classification Strategy for Quantitative Analysis of Rock Samples by Weiheng KONG, Lingwei ZENG, Yu RAO, Sha CHEN, Xu WANG, Yanting YANG, Yixiang DUAN, Qingwen FAN

    Published 2023-08-01
    “…Employing distinct preprocessing methods for different elemental compositions within various rock types helps mitigate spectral discrepancies caused by matrix effects, reduces spectral fluctuations and data noise, and enhances the accuracy and stability of quantitative analysis. …”
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  16. 216

    Hyperspectral Band Selection for Crop Identification and Mapping of Agriculture by Yulei Tan, Jingtao Gu, Laijun Lu, Liyuan Zhang, Jianyu Huang, Lin Pan, Yan Lv, Yupeng Wang, Yang Chen

    Published 2025-02-01
    “…Different crops, as well as the same crop at different growth stages, display distinct spectral and spatial characteristics in hyperspectral images (HSIs) due to variations in their chemical composition and structural features. …”
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  17. 217

    Dead Sea Stromatolite Reefs: Testing Ground for Remote Sensing Automated Detection of Life Forms and Their Traces in Harsh Environments by Nuphar Gedulter, Amotz Agnon, Noam Levin

    Published 2025-05-01
    “…In an effort to characterize the biosignatures and chemical composition inherent to stromatolites, we created a spectral classification scheme for distinguishing between stromatolites and their bedrock environment—typically carbonatic rocks, mostly dolomites. …”
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  18. 218

    Material synthesis and evaluation of metrological characteristics of potassium fluozirconate certified reference material by D. G. Lisienko, M. A. Dombrovskya, E. D. Kubrina, N. Ya. Varkentin

    Published 2017-05-01
    “…Research methods: X-ray diffraction, differential scanning colorimetry, thermogravimetric analysis, atomic-emission spectral analysis with arc excitation, mass spectral analysis, X-ray fluorescence analysis. …”
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  19. 219

    Transformer-Based Power Conversion System with Synchronous Adjustment of Modulated Inverters by Oleschuk V.

    Published 2018-04-01
    “…Modification of algorithms of space-vector modulation for transformer-based system with several converters allows providing an improvement of spectral composition of winding voltages of the system. …”
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  20. 220

    Exploring the structural variability in developing wheat grains using autofluorescence multispectral imaging at the macroscopic scale by Anne-Laure Chateigner-Boutin, Fabienne Guillon, Marie-Françoise Devaux

    Published 2025-06-01
    “…The images were analyzed using principal component analysis of large image series (large PCA). This chemometric method enables the quantification of the variability, its localization, highlighting the associated spectral characteristics and their attribution to chemical compounds.ResultsRegional and temporal heterogeneity was revealed. …”
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