Анализ и обоснование эффективности cad/cam‐систем по определению требований точности при технологическом проектировании машиностроител ных изделий

В работе проведен анализ эффективности использования компьютерно-интеллектуальной среды на этапе установления требований точности в 3D, и рассмотрено влияние полученных 3Dмоделей на автоматическую генерацию технологических процессов и управляющих программ для контрольно‐измерительных машин.

Técnicas de estimación y reconstrucción para la transmisión robusta de voz codificada

El interés de esta tesis se centra en el estudio de la degradación producida en transmisiones sobre dos tipos de redes de diferente alcance: las redes inalámbricas de ámbito local y las redes IP. Por un lado, en las redes inalámbricas de ámbito local, la degradación produce una alteración en los paquetes recibidos causada por el efecto multitrayecto. Por otro lado, en las redes IP, la degradación conlleva la pérdida completa del paquete o paquetes enviados a consecuencia de la congestión y retardos en los nodos de la red. Para prevenir y/o mitigar esta degradación durante la transmisión, en esta tesis se desarrollarán técnicas que hacen más robusto al codec frente a errores en el canal y mejorar así, la calidad de la voz recuperada. Por un lado, para las transmisiones sobre redes de ámbito local, donde la comunicación de voz generalmente se realiza empleando la tecnología de telefonía digital inalámbrica o Digital Enhanced Cordless Telephony (DECT), se estudiará la degradación producida por el efecto multitrayecto. Como consecuencia de los obstáculos que hay entre emisor y receptor, el receptor puede recibir varias copias de la señal emitida a consecuencia de la reflexión de la onda portadora sobre los diferentes obstáculos. Este hecho provocará una serie de desvanecimientos que pueden modificar la codificación original del paquete enviado. Para mitigar esta degradación, en esta tesis se plantea el uso de la técnica soft-decision decoding con la que obtener una estimación de la componente del paquete modificado. Para ello, en la estimación se tendrá en cuenta tanto la componente recibida en el paquete como la probabilidad a posteriori obtenida a partir del comportamiento del canal. Por otro lado, para las transmisiones sobre redes basadas en el protocolo IP, se estudiará la degradación producida a consecuencia de la pérdida de paquetes. Esta degradación se produce como consecuencia de la congestión de los nodos de la red, dando lugar a una o varias pérdidas de manera consecutiva durante la transmisión. Las técnicas empleadas en la bibliografía para reducir este tipo de degradación pueden dividirse en dos clases dependiendo de si actúan antes de enviar el paquete (basadas en el emisor) o durante la el proceso de decodificación (basadas en el receptor).Tesis Univ. Granada. Programa Oficial de Doctorado en: Tecnologías de la Información y la ComunicaciónBeca de Formación de Profesorado Investigador (FPU

Assessment of two complementary influenza surveillance systems : Sentinel primary care influenza-like illness versus severe hospitalized laboratory-confirmed influenza using the moving epidemic method

Monitoring seasonal influenza epidemics is the corner stone to epidemiological surveillance of acute respiratory virus infections worldwide. This work aims to compare two sentinel surveillance systems within the Daily Acute Respiratory Infection Information System of Catalonia (PIDIRAC), the primary care ILI and Influenza confirmed samples from primary care (PIDIRAC-ILI and PIDIRAC-FLU) and the severe hospitalized laboratory confirmed influenza system (SHLCI), in regard to how they behave in the forecasting of epidemic onset and severity allowing for healthcare preparedness. Epidemiological study carried out during seven influenza seasons (2010-2017) in Catalonia, with data from influenza sentinel surveillance of primary care physicians reporting ILI along with laboratory confirmation of influenza from systematic sampling of ILI cases and 12 hospitals that provided data on severe hospitalized cases with laboratory-confirmed influenza (SHLCI-FLU). Epidemic thresholds for ILI and SHLCI-FLU (overall) as well as influenza A (SHLCI-FLUA) and influenza B (SHLCI-FLUB) incidence rates were assessed by the Moving Epidemics Method. Epidemic thresholds for primary care sentinel surveillance influenza-like illness (PIDIRAC-ILI) incidence rates ranged from 83.65 to 503.92 per 100.000 h. Paired incidence rate curves for SHLCI-FLU/PIDIRAC-ILI and SHLCI-FLUA/PIDIRAC-FLUA showed best correlation index' (0.805 and 0.724 respectively). Assessing delay in reaching epidemic level, PIDIRAC-ILI source forecasts an average of 1.6 weeks before the rest of sources paired. Differences are higher when SHLCI cases are paired to PIDIRAC-ILI and PIDIRAC-FLUB although statistical significance was observed only for SHLCI-FLU/PIDIRAC-ILI (p-value Wilcoxon test = 0.039). The combined ILI and confirmed influenza from primary care along with the severe hospitalized laboratory confirmed influenza data from PIDIRAC sentinel surveillance system provides timely and accurate syndromic and virological surveillance of influenza from the community level to hospitalization of severe cases

Assessment of two complementary influenza surveillance systems: Sentinel primary care influenza-like illness versus severe hospitalized laboratory-confirmed influenza using the moving epidemic method

Publisher Copyright: © 2019 The Author(s).Background: Monitoring seasonal influenza epidemics is the corner stone to epidemiological surveillance of acute respiratory virus infections worldwide. This work aims to compare two sentinel surveillance systems within the Daily Acute Respiratory Infection Information System of Catalonia (PIDIRAC), the primary care ILI and Influenza confirmed samples from primary care (PIDIRAC-ILI and PIDIRAC-FLU) and the severe hospitalized laboratory confirmed influenza system (SHLCI), in regard to how they behave in the forecasting of epidemic onset and severity allowing for healthcare preparedness. Methods: Epidemiological study carried out during seven influenza seasons (2010-2017) in Catalonia, with data from influenza sentinel surveillance of primary care physicians reporting ILI along with laboratory confirmation of influenza from systematic sampling of ILI cases and 12 hospitals that provided data on severe hospitalized cases with laboratory-confirmed influenza (SHLCI-FLU). Epidemic thresholds for ILI and SHLCI-FLU (overall) as well as influenza A (SHLCI-FLUA) and influenza B (SHLCI-FLUB) incidence rates were assessed by the Moving Epidemics Method. Results: Epidemic thresholds for primary care sentinel surveillance influenza-like illness (PIDIRAC-ILI) incidence rates ranged from 83.65 to 503.92 per 100.000 h. Paired incidence rate curves for SHLCI-FLU/PIDIRAC-ILI and SHLCI-FLUA/PIDIRAC-FLUA showed best correlation index' (0.805 and 0.724 respectively). Assessing delay in reaching epidemic level, PIDIRAC-ILI source forecasts an average of 1.6 weeks before the rest of sources paired. Differences are higher when SHLCI cases are paired to PIDIRAC-ILI and PIDIRAC-FLUB although statistical significance was observed only for SHLCI-FLU/PIDIRAC-ILI (p-value Wilcoxon test = 0.039). Conclusions: The combined ILI and confirmed influenza from primary care along with the severe hospitalized laboratory confirmed influenza data from PIDIRAC sentinel surveillance system provides timely and accurate syndromic and virological surveillance of influenza from the community level to hospitalization of severe cases.This study was funded by the Program of Surveillance, Prevention and Control of Transmissible Diseases (PREVICET) of CIBER de Epidemiología y Salud Pública. (CIBERESP), Instituto de Salud Carlos III, Madrid and the Catalan Agency for the Management of Grants for University Research (AGAUR Grant Number 2017/SGR. 1342) the funders had no role in study design, data collection and analysis, decision to publish or preparation of the manuscript.Peer reviewe