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Showing 1-20 of 5,280 results
  1. An improved bicubic imaging fitting algorithm for 3D radar detection target

    3D ground-penetrating radar has been widely used in urban road underground disease detection due to its nondestructive, efficient, and intuitive...

    Fan-Ruo Li, Feng Yang, ... Hong-Jia **ng in Applied Geophysics
    Article 01 December 2022
  2. Taylor Polynomial Spatial Reference Field Method for Field Geomagnetic Diurnal Variation Reduction

    Abstract

    This study addresses the problems and shortcomings of the traditional field geomagnetic diurnal variation reduction method, the...

    Shupeng Su, Shuanggui Chen, Huiqin Zhao in Izvestiya, Physics of the Solid Earth
    Article 14 December 2022
  3. Fitting models for a grain size distribution: a review

    Many models are available to fit the curve of a grain size distribution, GSD. The article lists 61 models and 33 comparative studies of models....

    Article 25 October 2023
  4. Spherical harmonic coefficients of isotropic polynomial functions with applications to gravity field modeling

    Various aspects of gravity field modeling rely upon analytical mathematical functions for calculating spherical harmonic coefficients. Such functions...

    Dimitrios Piretzidis, Christopher Kotsakis, ... Michael G. Sideris in Journal of Geodesy
    Article Open access 15 November 2023
  5. A method for precisely predicting satellite clock bias based on robust fitting of ARMA models

    The precise satellite clock bias prediction is critical in improving the positioning, navigation and timing (PNT) service capabilities of the global...

    Guochao Zhang, Songhui Han, ... Kun Jia in GPS Solutions
    Article 20 October 2021
  6. Hyperspectral data compression by using rational function curve fitting in spectral signature subintervals and Savitsky-Golay smoothing filter

    There are various methods for lossless and lossy compression of hyperspectral images, acting in the spatial or spectral domain. Regarding the...

    Mersedeh Beitollahi, S. Abolfazl Hosseini, Sayed A. Hadei in Earth Science Informatics
    Article 10 April 2022
  7. Calculation of urban solar radiation based on simulation and fitting of ASHRAE model constants

    Karachi is one of the largest metropolitan cities in the world. It is located along the coast of the Arabian Sea. This article investigates the...

    Atteeq Razzak, Zaheer Uddin, ... Khan Alam in Arabian Journal of Geosciences
    Article 02 March 2022
  8. Methodology for obtaining contact angles in rock sample images using image processing and polynomial fitting techniques

    Estimating the contact angle in very complex rock pores presents some challenges to accurately identify the fluid–rock contact surface. This work...

    P. M. Sakugawa, M. A. Jaculli, ... H. Pedrini in Journal of Petroleum Exploration and Production Technology
    Article Open access 12 February 2020
  9. Fitting of magnetic measurements of Swarm satellites based on 3D surface spline model

    This study utilizes the 62208000 Swarm satellite data to establish a high-precision main magnetic field at the height of the satellites in China and...

    Liu Shuang, Feng Yan, ... Zhang **-Yuan in Applied Geophysics
    Article 01 December 2021
  10. Gaussian active learning on multi-resolution arbitrary polynomial chaos emulator: concept for bias correction, assessment of surrogate reliability and its application to the carbon dioxide benchmark

    Surrogate models are widely used to improve the computational efficiency in various geophysical simulation problems by reducing the number of model...

    Rebecca Kohlhaas, Ilja Kröker, ... Wolfgang Nowak in Computational Geosciences
    Article Open access 14 April 2023
  11. An improved algorithm based on equivalent sound velocity profile method at large incident angle

    With the development of ultra-wide coverage technology, multibeam echo-sounder (MBES) system has put forward higher requirements for localization...

    Qianqian Li, Qian Tong, ... Yu Luo in Acta Oceanologica Sinica
    Article 01 February 2024
  12. A global zenith tropospheric delay model with ERA5 and GNSS-based ZTD difference correction

    Highly accurate tropospheric delay information is essential for global navigation satellite system (GNSS) data processing. However, the current...

    Haojun Li, Ge Zhu, ... Hu Wang in GPS Solutions
    Article 27 June 2023
  13. Taylor Polynomial Model of the Geomagnetic Field in an Underground Gas Storage Area

    Abstract

    The study of normal geomagnetic background fields is the premise and basis for obtaining local geomagnetic anomalies caused by changes in...

    Zhendong Wang, Bin Chen, Jiehao Yuan in Geomagnetism and Aeronomy
    Article 01 May 2020
  14. A new phenomenological model for annealing of fission tracks in apatite: laboratory data fitting and geological benchmarking

    Rana track annealing model 2007, based on an Arrhenius approach, is significantly modified, including new assumptions, fitting parameters, and...

    Mukhtar A. Rana, Arnaldo L. Lixandrão Filho, Sandro Guedes in Physics and Chemistry of Minerals
    Article 19 April 2021
  15. Estimating GNSS satellite clock error to provide a new final product and real-time services

    A method is introduced to directly estimate the model coefficients of global navigation satellite system (GNSS) satellite clock errors using global...

    Haojun Li, **aoming Li, **gxin **ao in GPS Solutions
    Article 31 October 2023
  16. Determining the best fitting distribution of annual precipitation data in Serbia using L-moments method

    Precipitation is one of the key components in the water cycle. To analyse the changes in precipitation at a specific location, it is necessary to...

    Milan Gocic, Lazar Velimirovic, ... Slavisa Trajkovic in Earth Science Informatics
    Article 30 October 2020
  17. Modeling and Fitting of Three-Dimensional Mineral Microstructures by Multinary Random Fields

    Modeling a mineral microstructure accurately in three dimensions can render realistic mineralogical patterns which can be used for three-dimensional...

    Jakob Teichmann, Peter Menzel, ... Karl Gerald van den Boogaart in Mathematical Geosciences
    Article 29 September 2020
  18. Optimal Energy Storage Operation Chart and Output Distribution of Cascade Reservoirs Based on Operating Rules Derivation

    An energy storage operation chart (ESOC) is one of the most popular methods for conventional cascade reservoir operation. However, the problem of...

    Yuxin Zhu, Jianzhong Zhou, ... Wei Fang in Water Resources Management
    Article 11 October 2022
  19. An integrated velocity model application in ST area, Dongying Depression, China

    The velocity is not uniformly distributed in ST area of Dongying Depression in China, which varies both horizontally and vertically. In order to...

    Qinghui **e, Hongche Fan, ... Yanming Tong in Acta Geophysica
    Article 19 April 2023
  20. Modelling and analysis impact of El Nino and IOD to land and forest fire using polynomial and generalized logistic function: cases study in South Sumatra and Kalimantan, Indonesia

    In the last 20 years, land and forest fires have become a phenomenon that occurs annually in South Sumatra and Kalimantan. More than 2.6 million ha...

    Sri Nurdiati, Ardhasena Sopaheluwakan, ... Fadillah Rohimahastuti in Modeling Earth Systems and Environment
    Article 11 October 2021
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