Szukana fraza: [Abstract = "The article presents the idea of structural health monitoring as a supporting action to protect the environment. The preliminary proposal of a procedure enabling the damage detection of the joints is shown on the example of a two\-storey portal frame. Conclusions, presented in the paper, based on the measurement of accelerations in selected points of structure, subjected to dynamic excitation. Single\-layer, feed\-forward artificial neural networks were used as a tool for the analysis of changes in the dynamic parameters."]

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