Now showing items 1-6 of 6
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Estimation of AR parameters in time series with suddenly changing structure
Johnsen, Gyrid; Tjøstheim, Dag (Statistical report no. 19, Research report, 1988-07) -
Multiple bilinear time series models
Stensholt, Boonchai K.; Tjøstheim, Dag (Statistical report no. 11, Research report, 1985-06) -
Nonlinear cross-spectrum analysis via the local Gaussian correlation
Jordanger, Lars Arne; Tjøstheim, Dag (Journal article, 2017)Spectrum analysis can detect frequency related structures in a time series \(\{Y_t\}_{t\in\mathbb{Z}}\), but may in general be an inadequate tool if asymmetries or other nonlinear phenomena are present. This limitation is ... -
Nonlinear spectral analysis via the local Gaussian correlation
Jordanger, Lars Arne; Tjøstheim, Dag (Journal article, 2017)The spectral distribution \(f(\omega)\) of a stationary time series \(\{Y_t\}_{t\in\mathbb{Z}}\) can be used to investigate whether or not periodic structures are present in \(\{Y_t\}_{t\in\mathbb{Z}}\), but \(f(\omega)\) ... -
Segmentation of data traces with applications to dipmeter oil well measurements
Karlsen, Hans; Tjøstheim, Dag (Statistical report no. 18, Research report, 1988-02) -
Simulations of multi-beam sonar echos from schooling individual fish in a quiet environment
Holmin, Arne Johannes; Handegard, Nils Olav; Korneliussen, Rolf J.; Tjøstheim, Dag (Peer reviewed; Journal article, 2012-12)A model is developed and demonstrated for simulating echosounder and sonar observations of fish schools with specified shapes and composed of individuals having specified target strengths and behaviors. The model emulates ...