Automatic Classification of Field Winding Faults in Synchronous Motors based on Bicoherence Image Segmentation and Higher Order Statistics of Stray Flux Signals

[EN] In this work, the application of the bicoherence (a squared normalized version of the bispectrum) of the stray flux signal is proposed as a way of detecting faults in the field winding of synchronous motors. These signals are analyzed both under the starting and at steady state regime. Likewise, two quantitative indicators are proposed, the first one based on the maximum values of the asymmetry and the kurtosis of the bicoherence matrix obtained from the flux signals and the second one relying on an algorithm based on the bicoherence image segmentation of the obtained pattern for each analyzed state. The results are analyzed through a comparative study for the two considered motor regimes, obtaining satisfactory results that sustain the potential application of the proposed methodology for the automatic field winding fault detection in real applications.Miguel E. Iglesias Martínez s work was supported by the postdoctoral research scholarship "Ayudas para la recualificación del sistema universitario español 2021-2023. Modalidad: Margarita Salas", UPV, Ministerio de Universidades, Plan de Recuperación, Transformación y Resiliencia, Spain. Funded by the European Union-Next Generation EU. This work is also supported by Generalitat Valenciana (reference CIAICO/2021/020)Iglesias-Martínez, ME.; Guerra Carmenate, J.; Antonino-Daviu, J.; Dunai, L.; Platero, CA.; Conejero, JA.; Fernández De Córdoba, P. (2023). Automatic Classification of Field Winding Faults in Synchronous Motors based on Bicoherence Image Segmentation and Higher Order Statistics of Stray Flux Signals. IEEE Transactions on Industry Applications. 59(4):3945-3954. https://doi.org/10.1109/TIA.2023.32622203945395459

La comunicación en el proceso enseñanza aprendizaje en la especialidad de Medicina General Integral

La formación de especialistas en Medicina General Integral adquiere particular relevancia tanto para Cuba como para la colaboración médica cubana en el exterior. Este proceso plantea la necesidad de perfeccionar la comunicación en el contexto docente entre todos los participantes, en tanto se identifican dificultades en este aspecto para enfrentar los retos y exigencias de la medicina en la contemporaneidad. En el presente artículo se describen las características del proceso formativo de estos especialistas, se destaca el rol de todos los participantes en él y se exponen los principales fundamentos teóricos de la comunicación pedagógica

Naturally acquired immunity to Haemophilus influenzae type B in healthy Cuban children

We have evaluated the prevalence of antibody to immunogenicity of Haemophilus influenzae type b (Hib) in a group of 4 to 5 years old healthy children, who were too old to be included in the first vaccinated cohort when Hib vaccination begun in Cuba in 1999. Serum capsular polysaccharide specific IgG antibody concentrations were measured in 974 healthy children, between February and May 2002. The prevalence of Hib nasopharyngeal carriage was also estimated. The majority of children (99.7%) had more than 1 µg/ml of antibody. The preliminary report of the nasopharyngeal cultures was positive for H. influenzae in 16 children, but in only one was confirmed as Hib after serotyping (0.1% Hib nasopharyngeal carrier). These results provide evidence that in Cuba the natural active immunity to Hib can be acquired at an early age

SHORT COMMUNICATION - Naturally Acquired Immunity to Haemophilus influenzae Type B in Healthy Cuban Children

We have evaluated the prevalence of antibody to immunogenicity of Haemophilus influenzae type b (Hib) in a group of 4 to 5 years old healthy children, who were too old to be included in the first vaccinated cohort when Hib vaccination begun in Cuba in 1999. Serum capsular polysaccharide specific IgG antibody concentrations were measured in 974 healthy children, between February and May 2002. The prevalence of Hib nasopharyngeal carriage was also estimated. The majority of children (99.7%) had more than 1 µg/ml of antibody. The preliminary report of the nasopharyngeal cultures was positive for H. influenzae in 16 children, but in only one was confirmed as Hib after serotyping (0.1% Hib nasopharyngeal carrier). These results provide evidence that in Cuba the natural active immunity to Hib can be acquired at an early age