The detection of multicomponent signals for which the components are not equidetectable is precisely investigated as a function of the level difference ΔL(i∕j) between components. The detection thresholds are determined for a seven-tone complex signal with random starting phases masked by white noise. Level differences between the components are examined. A model for non-equidetectable conditions based on the statistical summation model is described. The improvement in detection is calculated from the level difference between components that is related to the thresholds for single components. The model predictions are in accordance with the experimental results.
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http://dx.doi.org/10.1121/1.3637364 | DOI Listing |
Polymers (Basel)
December 2024
National Research Council-National Institute of Optics, Largo E. Fermi, 6, 50125 Florence, Italy.
Understanding the deterioration processes in wooden artefacts is essential for accurately assessing their conservation status and developing effective preservation strategies. Advanced imaging techniques are currently being explored to study the impact of chemical changes on the structural and mechanical properties of wood. Nonlinear optical modalities, including second harmonic generation (SHG) and two-photon excited fluorescence (TPEF), combined with fluorescence lifetime imaging microscopy (FLIM), offer a promising non-destructive diagnostic method for evaluating lignocellulose-based materials.
View Article and Find Full Text PDFSci Rep
December 2024
Institute of Informatics, HES-SO Valais-Wallis University of Applied Sciences and Arts Western Switzerland, Sierre, Switzerland.
Manual segmentation of lesions, required for radiotherapy planning and follow-up, is time-consuming and error-prone. Automatic detection and segmentation can assist radiologists in these tasks. This work explores the automated detection and segmentation of brain metastases (BMs) in longitudinal MRIs.
View Article and Find Full Text PDFJ Food Sci
December 2024
College of Computer and Information Engineering, Inner Mongolia Agricultural University, Hohhot, China.
As consumers increasingly prioritize food safety and nutritional value, the dairy industry faces a pressing need for rapid and accurate methods to detect essential nutritional components in milk, such as fat, protein, and lactose. Hyperspectral imaging (HSI) technology, known for its non-destructive, fast, and precise nature, shows great promise in food quality assessment. However, the high dimensionality of HSI data poses challenges for effective band selection and model optimization.
View Article and Find Full Text PDFJ Sep Sci
December 2024
Natural and Medical Sciences Research Center, University of Nizwa, Nizwa City, Oman.
Micellar liquid chromatography (MLC) has proven beneficial efficiency and ecological impact for routine quality control activities. In the proposed study, cyrene was investigated for the first time, together with other green additives, as a novel safe organic solvent in reversed-phase MLC. Quality-by-design (QbD) approach screened their effect on the separation performance.
View Article and Find Full Text PDFJ Pharm Biomed Anal
December 2024
Hebei Provincial Hospital of Traditional Chinese Medicine, Shijiazhuang 050000, China. Electronic address:
Congelex Laxative Granules is an in-house preparation of Hebei Provincial Hospital of Traditional Chinese Medicine. This study aims to establish the HPLC fingerprint of Congelex Laxative Granules and evaluate its quality using chemometric methods. The Agilent Eclipse Plus C18 column and a methanol-water gradient elution system were employed, with detection at 224 nm.
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