Mikko Heikkinen

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The current generation of mobile devices is capable of producing polyphonic sounds, has enough processing power for real-time signal processing, and much better sound quality than their predecessors. The importance of audio is increasing as we are moving towards multimodal user interfaces where audio is one of the major components. In this paper, we present(More)
The control of an activated sludge treatment plant depends on on-line process data and measurements made in the laboratory. The most important quality indicators of activated sludge are settling properties. Even though the behaviour of activated sludge is basically known, long lags and the complex characteristic of biological activity set a challenge for(More)
This paper presents an overview of an analysis method based on Self-Organizing Maps (SOM) which was applied to an activated sludge process. The aim of the study was to determine whether the neural network modelling method could be a useful and time-saving way to analyze this kind of process data. The used analysis procedure went as follows. At first, the(More)