Browsing by Subject "Time-series analysis -- Mathematical models"
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Item Fingerprint matching using friction ridge counts(Texas Tech University, 2004-08) Wilson, Sherri MAs an alternative to current minutiae-based fingerprint matching techniques, a "circular" matching method is introduced. This method involves choosing the "best" center of the fingerprint, radiating circles outward from the center, and then recording the number of ridge crossings for each radius. From the vector of radii values and ridge crossing counts, a profile function is created. The profile functions of different fingerprints are compared using the absolute integrated difference. Box-Jenkins (ARIMA) time series models, and time series spectral analysis.Item Time series prediction using neural networks(Texas Tech University, 2004-05) Knerr, CarrieThis thesis involves the investigation of the effect of prior knowledge embedded in an artificial fully connected recurrent neural network for the prediction of non-linear time series. The networks utilize the back propagation method for training. Two network architectures are compared using time series such as the square wave, Mackey Glass data, and an ECG signal to determine if prediction quality or training ability are improved when more information through cosine oscillators are embedded in the network. The benefit of such an exercise may be the prediction of abnormal ECG signals, which is an electrical measure of heart activity. Such ability would allow medical professionals to intervene and possibly prevent abnormal ECG signals. The improved network was able to provide increased prediction value and training ability for the Mackey Glass time series.