Моделирование двух частотного акустического тракта для прибора диагностики гайморита

В данной ВКР проводилось изучение методов диагностики гайморита, применения ультразвука в медицине, метода конечных элементов, двухчастотного метода для компенсации погрешности измерения ультразвукового локатора. Кроме того, построены многослойные модели в программной пакете COMSOL, проведены предварительные расчеты распространения упругой волны в различных средах, имеющих различную геометрическую форму на разработанной модели, обработаны принятые сигналы для определения начала прихода эхо-сигнала, разработана структурная схема прибора, а также рассчитаны необходимые элементы для его реализации.In this diplom were studied methods for diagnosing sinusitis, ultrasound in medicine purpose, the finite element method, and the two-frequency method to compensate the measurement error of ultrasonic locators. In addition, multilayer models were built in the COMSOL software package, preliminary calculations of the propagation of an elastic wave in various media with different geometric shapes, received signals were processed to determine the recieve moment of the echo signal, a structural diagram of the device was developed, and the necessary elements were calculated

Long-Term Smart Grid Planning Under Uncertainty Considering Reliability Indexes

The electricity sector is fast moving towards a new era of clean generation devices dispersed along the network. On one hand, this will largely contribute to achieve the multi-national environment goals agreed via political means. On the other hand, network operators face new complexities and challenges regarding network planning due to the large uncertainties associated with renewable generation and electric vehicles integration. In addition, due to new technologies such as combined heat and power (CHP), the district heat demand is considered in the long-term planning problem. The 13-bus medium voltage network is evaluated considering the possibility of CHP units but also without. Results demonstrate that CHP, together with heat-only boiler units, can supply the district heat demand and contribute to network reliability. They can also reduce the expected energy not supplied and the power losses cost, avoiding the need to invest in new power lines for the considered lifetime project.This work has received funding from the EU's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 641794 (project DREAM-GO) and from FEDER Funds through COMPETE program and from National Funds through FCT under the project UID/EEA/00760/2013. Bruno Canizes is supported by FCT Funds through SFRH/BD/110678/2015 PhD scholarship and M. Ali Fotouhi Ghazvini is supported by FCT Funds through SFRH/BD/94688/2013 PhD scholarship.info:eu-repo/semantics/publishedVersio