Zobrazeno 1 - 10
of 109
pro vyhledávání: '"Allan Nielsen"'
Autor:
Allan Nielsen
Publikováno v:
Nielsen, A A 2022, ' The eigenvector-eigenvalue identity applied to fast calculation of polSAR scattering characterization ', IEEE Geoscience and Remote Sensing Letters, vol. 19, 4507305, pp. 1-5 . https://doi.org/10.1109/LGRS.2022.3169994
Unlike the original Cloude-van Zyl decomposition of reflection symmetric polSAR data, a recently suggested version of the decomposition for full/quad pol data relies on the Cloude-Pottier mean alpha angle (ᾱ) to characterize the scattering mechanis
Publikováno v:
Journal of patient safety. 17(8)
OBJECTIVE The aim of the study was to analyze how patients' own reports of safety incidents to the Danish Patient Safety Database can contribute to patient safety. BACKGROUND Patient involvement enhances patient safety; however, there is a shortage o
Autor:
Allan Nielsen, David Malmgren-Hansen, Leif Toudal Pedersen, Roberto Saldo, Henning Skriver, John Lavelle, Jørgen Buus-Hinkler, Matilde Brandt Kreiner
Publikováno v:
Nielsen, A A, Malmgren-Hansen, D, Toudal Pedersen, L, Saldo, R, Skriver, H, Lavelle, J, Buus-Hinkler, J & Brandt Kreiner, M 2019, ' Interpolation of AMSR2 data for improvement of ice charting ', 2019 SPIE Remote Sensing Conference, Strasbourg, France, 09/09/2019-12/09/2019 .
Technical University of Denmark Orbit
Technical University of Denmark Orbit
Today, ice charts in Greenland waters are produced manually by the Danish Meteorological Institute (DMI) for selected regions depending on season and shipping routes. The project “Automated Downstream Sea Ice Products for Greenland Waters” or sho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::2f3a794d1794a0a0c532baa09f3d530f
https://orbit.dtu.dk/en/publications/e7567b4f-574e-4f61-bc22-e895f734c855
https://orbit.dtu.dk/en/publications/e7567b4f-574e-4f61-bc22-e895f734c855
Publikováno v:
Nielsen, A A, Skriver, H & Conradsen, K 2019, Generation of Sample Complex Wishart Distributed Matrices and Change Detection in Polarimetric SAR Data . in Proceedings of 2019 International Conference on Digital Image and Signal Processing . 2019 International Conference on Digital Image and Signal Processing, Oxford, United Kingdom, 29/04/2019 .
Technical University of Denmark Orbit
Technical University of Denmark Orbit
The complex Wishart distribution is used to describe synthetic aperture radar (SAR) data in the so-called covariance matrix representation. We give a test statistic for detection of differences between two instances in this distribution and an associ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::1dbadde682f40dbc27ffd2b0c8c4d000
https://orbit.dtu.dk/en/publications/c3f5d10a-5ec2-44c5-999e-4873bc1cbf4e
https://orbit.dtu.dk/en/publications/c3f5d10a-5ec2-44c5-999e-4873bc1cbf4e
Publikováno v:
Rutkowski, J, Canty, M J & Nielsen, A A 2018, ' Site Monitoring with Sentinel-1 Dual Polarization SAR Imagery Using Google Earth Engine ', Journal of Nuclear Materials Management, vol. 46, no. 3, pp. 48-59 .
Technical University of Denmark Orbit
Technical University of Denmark Orbit
At no cost to the user, the Copernicus mission frequently releases Synthetic Aperture Radar (SAR) datasets collected by the Sentinel-1 sensors. These datasets are regularly pre-processed by the Google Earth Engine and made available to the scientific
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::ba4faaa6484f737e370aa74c2894ef07
https://orbit.dtu.dk/en/publications/35d9dcaf-cbf8-4528-b795-0eee579521a8
https://orbit.dtu.dk/en/publications/35d9dcaf-cbf8-4528-b795-0eee579521a8
Publikováno v:
Acta Medica Scandinavica. 187:353-363
One hundred and eight patients with myocardial infarction have been investigated 1–1 1/2 year after the acute attack. As a control group 44 coaeval hospital patients with no known ischaemic heart disease and 65 healthy young subjects were examined.
Publikováno v:
Skriver, H, Nielsen, A A & Conradsen, K 2015, ' Change detection in a time series of polarimetric SAR images ', POLinSAR 2015-1st BIOMASS Science workshop, Frascati, Italy, 26/01/2015-30/01/2015 .
Technical University of Denmark Orbit
Technical University of Denmark Orbit
A test statistic for the equality of two or several variance-covariance matrices following the real (as opposed to the complex) Wishart distribution with an associated probability of finding a smaller value of the test statistic is described in the l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::23820ee0b5c808494cf8a3ecf1e4bfd8
https://orbit.dtu.dk/en/publications/3bb7916a-ecfd-47ae-a953-1592282a577f
https://orbit.dtu.dk/en/publications/3bb7916a-ecfd-47ae-a953-1592282a577f
Publikováno v:
Svendsen, P L, Andersen, O B & Nielsen, A A 2014, ' Arctic sea-level reconstruction analysis using recent satellite altimetry ', Geophysical Research Abstracts . < http://meetingorganizer.copernicus.org/EGU2014/EGU2014-14578.pdf >
Technical University of Denmark Orbit
Technical University of Denmark Orbit
We present a sea-level reconstruction for the Arctic Ocean using recent satellite altimetry data. The model, forced by historical tide gauge data, is based on empirical orthogonal functions (EOFs) from a calibration period; for this purpose, newly re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::93fb66a1c58440f0dce6a3145bbd7dbc
https://orbit.dtu.dk/en/publications/e9f53570-bb3d-4cbf-8151-8f82b439e26a
https://orbit.dtu.dk/en/publications/e9f53570-bb3d-4cbf-8151-8f82b439e26a
Publikováno v:
Svendsen, P L, Andersen, O B & Nielsen, A A 2012, Sea level reconstruction: Exploration of methods for combining altimetry with other data to beyond the 20-year altimetric record . in 20 years of progress in radar altimetry symposium : Abstract book . European Space Agency, Italy, pp. 149, 20 years of Progress in Radar Altimetry, Venice-Lido, Italy, 24/09/2012 .
Technical University of Denmark Orbit
Technical University of Denmark Orbit
Ocean satellite altimetry has provided global sets of sea level data for the last two decades, allowing determination of spatial patterns in global sea level. For reconstructions going back further than this period, tide gauge data can be used as a p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::3bec626b65188bda863f0fa5ef8c35b6
https://orbit.dtu.dk/en/publications/fe3842b2-c8f7-4952-9c31-152809618e72
https://orbit.dtu.dk/en/publications/fe3842b2-c8f7-4952-9c31-152809618e72
Publikováno v:
Vestergaard, J S, Nielsen, A A & Andersen, O B 2010, ' Seventeen years of global SSH anomalies analyzed by a maxmaximum information based extension to EOF analysis ', 2010 ASLO Ocean Sciences Meeting, Portland, OR, United States, 22/02/2010-26/02/2010 .
Technical University of Denmark Orbit
Technical University of Denmark Orbit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::5857372707a0dd1aa7b544f68d08231c
https://orbit.dtu.dk/en/publications/9d7df48f-de7e-41a1-9985-33c66ea8076e
https://orbit.dtu.dk/en/publications/9d7df48f-de7e-41a1-9985-33c66ea8076e