Prediction of buckling load of columns using artificial neural networks

A number of investigators have proposed semiempirical formulas for the critical buckling load of slender columns. The departure from the assumptions of the elastic-plastic theory makes the task of incorporating all the features of real-life columns into a single formula very difficult. As a result, semiempirical formulas, adopted for design specifications often follow a lower bound to experimental observations to include a variety of column types. Therefore, a significant portion of the actual column strength remains unutilized, when such a lower bound is adopted in the design of axially compressed members. This technical note reports development of a tool for the prediction of buckling load of columns, which requires minimum assumptions using neural computing techniques. This concept can be extended to include a variety of column types in a single model for the buckling load of columns. This concept can also be further extended for reliability analysis as the network can also predict the standard deviation in the column strength

Rede neural artificial aplicada à previsão de vazão da Bacia Hidrográfica do Rio Piancó Artificial neural network applied to the forecast of streamflow in the Piancó River Basin

A previsão de vazão em um sistema hídrico não é apenas uma das técnicas utilizadas para minimizar o impacto das incertezas do clima sobre o gerenciamento dos recursos hídricos mas, também, um dos principais desafios relacionados ao conhecimento integrado da climatologia e da hidrologia de uma bacia hidrográfica. O objetivo deste trabalho foi modelar a relação não-linear entre chuva e vazão na bacia hidrográfica do rio Piancó, no semiárido paraibano, através da técnica de Redes Neurais Artificiais (RNA). Aqui se avaliou a capacidade da RNA modelar o processo chuva-vazão em base mensal e se considerou, durante o seu treinamento, a influência da arquitetura da rede e da inicialização dos pesos. No final do treinamento foi escolhida a melhor arquitetura para modelar vazões médias mensais na bacia estudada, com base no desempenho do modelo. A arquitetura de RNA que produziu melhor resultado foi a RC315L, com valores para o coeficiente de determinação, de eficiência e erro padrão da estimativa de 92,0, 77,0% e 8,29, respectivamente.<br>Streamflow forecasting in a water system is one of the techniques used to reduce the impact of the uncertainties of the climate on administration of the water resources. That technique can be considered as one of the principal challenges related to the integrated knowledge of the climatology and of the hydrology of the river basin. The aim of this work was to model the non-linear relationship between rainfall and streamflow in the Piancó River Basin, in the Paraíba semiarid, using the technique of Artificial Neural Networks (ANN). Here the ability of ANN was evaluated to model the rainfall-runoff process on a monthly basis. During training of the ANN, the network architecture and weights initialization influence were considered. At the end of the training the best architecture was chosen, to model the streamflow monthly mean in the studied basin, based upon the performance of the model. The ANN architecture that produced the better result was RC315L with values for the determination coefficient, efficiency coefficient and standard estimate error (SEE) equal to 92.0, 77.0% and 8.29 respectively

Emotional ANN (EANN): a new generation of neural networks for hydrological modeling in IoT

Emotional artificial neural network (EANN) is a cutting-edge artificial intelligence method that has been used by researchers in the engineering and medical sciences over the recent years. First introduced in the 1999s, EANN is the combination of physiological and neural sciences for investigation of complex processes. Rainfall-runoff is a complex hydrological process that may be modeled by EANN methods to attain information about the response of a catchment to a rainfall event. In practice, the response is surface runoff either in the form of streamflow or flood in the catchment of interest. Thus, a reliable rainfall-runoff model is an inevitable component of a watershed so that decision-makers may use it to reduce the relevant vulnerability against extreme rainfall events. Undoubtedly, one way to empower the capabilities of rainfall-runoff models is the integration of recent achievements in the Internet of Things (IoT) with robust modeling algorithms such as EANN. Relying on the huge amount of knowledge within IoT components, the hybrid IoT-EANN can yield in the high-resolution space-time estimations of runoff that is a practical way to mitigate potential hazards of flooding through real time or in advance actions. With this chapter, we provide a short overview of the state-of-the-art EANN and its application in rainfall-runoff modeling. In addition, a concise review of the applications of IoT in hydro-environmental issues is provided. The chapter reveals that integrations of IoT with hydro-environmental studies are in their infancy. Being a new class of investigation, there is no hybrid rainfall-runoff model within the literature coupling IoT technology with artificial intelligence.No sponso