Journal ArticleDOI
Applications of fast orthogonal search: time-series analysis and resolution of signals in noise.
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TLDR
Simulations are provided to demonstrate precise detection of component frequencies and weights in short data records, coping with missing or unequally spaced data, and recovery of signals heavily contaminated with noise.Abstract:
In this paper a technique is examined for obtaining accurate and parsimonious sinusoidal series representations of biological time-series data, and for resolving sinusoidal signals in noise. The technique operates via a fast orthogonal search method discussed in the paper, and achieves economy of representation by finding the most significant sinusoidal frequencies first, in a least squares fit sense. Another reason for the parsimony in representation is that the identified sinusoidal series model is not restricted to frequencies which are commensurate or integral multiples of the fundamental frequency corresponding to the record length. Biological applications relate to spectral analysis of noisy time-series data such as EEG, ECG, EMG, EOG, and to speech analysis. Simulations are provided to demonstrate precise detection of component frequencies and weights in short data records, coping with missing or unequally spaced data, and recovery of signals heavily contaminated with noise. The technique is also shown to be capable of higher frequency resolution than is achievable by conventional Fourier series analysis.read more
Citations
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Journal ArticleDOI
Orthogonal approaches to time-series analysis and system identification
M.J. Korenberg,L.D. Paarmann +1 more
TL;DR: Some recent, efficient approaches to nonlinear system identification, ARMA modeling, and time-series analysis are described and illustrated and examples are provided to demonstrate superiority over established classical techniques.
Journal ArticleDOI
Motion Mode Recognition for Indoor Pedestrian Navigation Using Portable Devices
TL;DR: The performance of the motion mode recognition module was examined on different types of mobile computing devices, including various brands of smartphones, tablets, smartwatches, and smartglasses, and the results obtained showed the capability of enhancing positioning performance.
Journal ArticleDOI
Microsaccadic sampling of moving image information provides Drosophila hyperacute vision
Mikko Juusola,Mikko Juusola,An Dau,Zhuoyi Song,Narendra Solanki,Diana Rien,Diana Rien,David Jaciuch,Sidhartha Dongre,Florence Blanchard,Gonzalo G. de Polavieja,Roger C. Hardie,Jouni Takalo +12 more
TL;DR: The results show how refractory phototransduction and rapid photomechanical photoreceptor contractions jointly sharpen retinal images of moving objects in space-time, enabling hyperacute vision and explain how such microsaccadic information sampling exceeds the compound eyes’ optical limits.
Patent
System and method for evaluating an electrophysiological signal
TL;DR: In this paper, a model-derived reconstruction over at least one cycle of the electrophysical signal is used to identify a pathological event, whereby at least 1 term in the model is differentiable.
References
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System Identification: Theory for the User
TL;DR: Das Buch behandelt die Systemidentifizierung in dem theoretischen Bereich, der direkte Auswirkungen auf Verstaendnis and praktische Anwendung der verschiedenen Verfahren zur IdentifIZierung hat.
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