RESUMEN
Señor editor: La pandemia actual de Covid-19 relacionada con la ya existente de virus de inmunodeficiencia humana (VIH) genera conocimiento acerca de la población seropositiva. Una cohorte española afirma que la administración de antirretrovirales (ARV) específicos contribuye a tener menor riesgo de presentar Covid-19 y hospitalización por esta causa...
Asunto(s)
COVID-19 , Infecciones por VIH , Humanos , Incidencia , SARS-CoV-2 , Linfocitos TRESUMEN
Non-destructive assessment of the physicochemical properties of food products, especially fruits, makes it possible to examine the internal quality without any damage. This is applicable at different stages of fruit growth, harvesting stage, and storage as well as at the market stage. In this regard, the present study aimed to estimate the total chlorophyll content using three types of data: color data, spectral data, and spectral data related to the most effective wavelengths. The most important steps of the proposed algorithms include extracting spectral and color data from each sample of Fuji cultivar apple, selecting the most effective wavelengths at the range of 660-720 nm using hybrid artificial neural network-particle swarm optimization (ANN-PSO), non-destructive assessment of the chemical property of total chlorophyll content based on color data, and spectral data using hybrid artificial neural network-Imperialist competitive algorithm (ANN-ICA). In order to assess the reliability of the hybrid ANN-ICA, 1000 iterations were performed after selecting the optimal structure of the artificial neural network. According to the results, in the best training mode and using spectral data and the most effective wavelength, total chlorophyll content was predicted with the R2 and RMSE of 0.991 and 0.0035, 0.997 and 0.001, 0.997 and 0.0006, respectively.