Wyniki wyszukiwania dla: RIVERS , SNOW , SYNTHETIC APERTURE RADAR , TIME SERIES ANALYSIS , FAULT LOCATION , BACKSCATTER

• Flooding Extent Mapping for Synthetic Aperture Radar Time Series Using River Gauge Observations

  Publikacja

  • T. E. Berezowski
  • T. Bieliński
  • J. Osowicki

  - IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing - Rok 2020

  The flooding extent area in a river valley is related to river gauge observations such as discharge and water elevations. The higher the water elevations, or discharge, the larger the flooding area. Flooding extent maps are often derived from synthetic aperture radar (SAR) images using thresholding methods. The thresholding methods vary in complexity and number of required parameters. We proposed a simple thresholding method that...

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• TIME SERIES MODELING (PG_00063724)

  Kursy Online

  • P. Paradowski

  Effectively uses in-depth knowledge of economic time series analysis methods, applying the results of analyzes to formulate forecasts. Subject contents: 1. Classical time series analysis (trend, cyclical fluctuations) 2. Exponential smoothing models 3. Holt and Winters model 4. Stochastic processes and time series 5. Characteristics of stochastic processes 6. Process spectrum autocorrelation functions 7. Study of the stationarity...

• 3D seafloor reconstruction using data from side scan and synthetic aperture sonar

  Publikacja

  • K. Bikonis
  • Z. Łubniewski

  - HYDROACOUSTICS - Rok 2010

  Side scan and synthetic aperture sonars are widely used imaging systems in the underwater environment. They are relatively cheap and easy to deploy, in comparison with more powerful sensors, like multibeam echosounders. Although side scan and synthetic aperture sonars does not provide seafloor bathymetry directly, their records are finally related to seafloor images. Moreover, the analysis of such images performed by human eye...

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• Computer vision techniques applied for reconstruction of seafloor 3D images from side scan and synthetic aperture sonars data

  Publikacja

  • K. Bikonis
  • A. Stepnowski
  • M. Moszyński

  - Rok 2008

  The Side Scan Sonar and Synthetic Aperture Sonar are well known echo signal processing technologies that produce 2D images of the seafloor. Both systems combines a number of acoustic pings to form a high resolution image of seafloor. It was shown in numerous papers that 2D images acquired by such systems can be transformed into 3D models of seafloor surface by algorithmic approach using intensity information, contained in a grayscaled...

• On the Handling of Outliers in the GNSS Time Series by Means of the Noise and Probability Analysis

  Publikacja

  • A. Klos
  • J. Bogusz
  • M. Figurski
  • W. Kosek

  - Central European Journal of Geosciences - Rok 2015

  The data pre-analysis plays a significant role in the noise determination. The most important issue is to find an optimum criterion for outliers removal, since their existence can affect any further analysis. The noises in the GNSS time series are characterized by spectral index and amplitudes that can be determined with a few different methods. In this research, the Maximum Likelihood Estimation (MLE) was used. The noise amplitudes...

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• TIME SERIES DATA FOR 3D FLOOD MAPPING

  Publikacja

  • B. Wieczorek
  • A. Sobieraj-Żłobińska
  • T. Sidorowicz

  - Rok 2018

  Thanks to the ability to collect information about large areas and with high frequency in time areas threatened by floods can be closely monitored. The effects of flooding are socio-economic losses. In order to reduce those losses, actions related to the determination of building zones are taken. Moreover, the conditions to be met by facilities approved for implementation in such areas are determined. Therefore, satellite data...

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• TIME SERIES MODELING 2023/2024

  Kursy Online

  • M. B. Pietrzak

  prowadzący: assoc. prof. Ján Dvorský, PhD

• Time-series analysis of road safety trends aggregated at national level in Europe for 2000-2010

  Publikacja

  • R. Bergel-Hayat
  • J. Żukowska

  - Rok 2015

  The reader will find in this study road safety modelling theory and time-series analysis techniques, applications to long period data of injury accidents and casualities, aggregared at national level

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• JOURNAL OF TIME SERIES ANALYSIS

  Czasopisma

  ISSN: 0143-9782 , eISSN: 1467-9892

• Road safety analysis in Poland using time-series modelling techniques

  Publikacja

  • J. Żukowska

  - Journal of Polish Safety and Reliability Association, Summer Safety and Reliability Seminars - Rok 2013

  A number of international studies argue that there is a correlation between the number of traffic fatalities and the degree of public activity. The studies use the unemployment rate to support that argument. As unemployment grows miles travelled fall, a factor known to affect road safety. This relationship seems to be true for Poland, as well. The model presented in the paper is intended to prove it. It is a structural time-series local...

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