Browsing NTNU Open by Author "Westad, Frank Ove"
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Automated Log Data Analytics Workflow – The Value of Data Access and Management to Reduced Turnaround Time for Log Analysis
Torres Caceres, Veronica Alejandra; Duffaut, Kenneth; Westad, Frank Ove; Stovas, Alexey; Johansen, Yngve Bolstad; Jenssen, Arne Johannes Kaaijk (Peer reviewed; Journal article, 2022)The oil and gas industry of today is undergoing rapid digitalization. This implies a massive effort to transform standard work procedures and workflows into more efficient practices and implementations using machine learning ... -
Automated well log depth matching: Late fusion multimodal deep learning
Torres Caceres, Veronica Alejandra; Duffaut, Kenneth; Yazidi, Anis; Westad, Frank Ove; Johansen, Yngve Bolstad (Peer reviewed; Journal article, 2022)Petrophysical interpretation and optimal correlation extraction of different measurements require accurate well log depth matching. We have developed a supervised multimodal machine learning alternative for the task of ... -
Automated Well-Log Depth Matching – 1D Convolutional Neural Networks Vs. Classic Cross Correlation
Torres Caceres, Veronica Alejandra; Duffaut, Kenneth; Yazidi, Anis; Westad, Frank Ove; Johansen, Yngve Bolstad (Peer reviewed; Journal article, 2022)During drilling and logging, depth alignment of well logs acquired in the same borehole section at different times is a vital preprocessing step before any petrophysical analysis. Depth alignment requires high precision ... -
Classification in hyperspectral images by independent component analysis, segmented cross-validation and uncertainty estimates
Galindo-Prieto, Beatriz; Westad, Frank Ove (Journal article; Peer reviewed, 2018)Independent component analysis combined with various strategies for cross-validation, uncertainty estimates by jack-knifing and critical Hotelling’s T2 limits estimation, proposed in this paper, is used for classification ... -
Exploratory analysis of hyperspectral FTIR data obtained from environmental microplastics samples
Wander, Lukas; Vianello, Alvise; Vollertsen, Jes; Westad, Frank Ove; Braun, Ulrike; Paul, Andrea (Peer reviewed; Journal article, 2020)Hyperspectral imaging of environmental samples with infrared microscopes is one of the preferred methods to find and characterize microplastics. Particles can be quantified in terms of number, size and size distribution. ... -
Identification and Classification of Electrical Loads in a Norwegian Household Using Energy Disaggregation Methods of Non-Intrusive Load Monitoring.
Wermundsen, André Nydegger (Master thesis, 2019)Formålet med denne avhandlingen er å fastslå fordelene til forbrukerne ved innføring av smart strømmålere. Et eksperiment ble utformet for å samle inn totalt forbruksdata samt individuell apparatdata i et ikke-laboratoriemiljø ... -
Probe-less non-invasive near-infrared spectroscopic bioprocess monitoring using microspectrometer technology
Westad, Frank Ove (Journal article; Peer reviewed, 2019)Real-time measurements and adjustments of critical process parameters are essential for the precise control of fermentation processes and thus for increasing both quality and yield of the desired product. However, the ... -
Probeless non-invasive near-infrared spectroscopic bioprocess monitoring using microspectrometer technology
Zimmerleiter, Robert; Kager, Julian; Nikzad-Langerodi, Ramin; Berezhinskiy, Vladimir; Westad, Frank Ove; Herwig, Christoph; Brandstetter, Markus (Journal article; Peer reviewed, 2019)Real-time measurements and adjustments of critical process parameters are essential for the precise control of fermentation processes and thus for increasing both quality and yield of the desired product. However, the ... -
A retrospective look at cross model validation and its applicability in vibrational spectroscopy
Westad, Frank Ove (Peer reviewed; Journal article, 2021)In this paper, it is presented how Cross Model Validation (CMV), also known as double cross validation, efficiently can be applied for variable selection in spectroscopic applications. The chosen applications are FT-IR ... -
Techniques for signal reconstruction from sparsely compressed vibration measurements
Johansen, Jo Aleksander (Master thesis, 2022)Verden er i stadig digitalisering og vi lener oss mer og mer på teknologi for å fortsette utviklingen av omverdenen. En stor del av dette innebærer å samle informasjon. Ettersom trådløse sensorer blir mindre plasseres de ...