Results 1 to 10 of about 28,565 (112)

Extensions to Mean–Geometric Mean Linking

Mathematics
Mean-geometric mean (MGM) linking is a widely used method for linking two groups within the two-parameter logistic (2PL) item response model. However, the presence of differential item functioning (DIF) can lead to biased parameter estimates using the ...
Alexander Robitzsch
doaj   +3 more sources

Comparing Different Specifications of Mean–Geometric Mean Linking

Foundations
Mean–geometric mean (MGM) linking compares group differences on a latent variable θ within the two-parameter logistic (2PL) item response theory model.
Alexander Robitzsch
doaj   +3 more sources

A Data-Driven Framework for Class Overlap Reduction to Improve Soft Sensor Performance [PDF]

Sensors
In the data-driven applications, class overlap and class imbalance are major factors that degrade machine learning performance. While existing resampling methods often address these issues independently, they frequently fail to preserve the underlying ...
Faizal Widya Nugraha, Thanda Shwe, Israel Mendonça, Masayoshi Aritsugi   +3 more
doaj   +2 more sources

REGISTRATION OF REMOTE SENSING IMAGES BASED ON FEATURE FUSION TECHNIQUES [PDF]

International Journal of Intelligent Computing and Information Sciences, 2016
Geometric correction is used to correct the registration errors in remotely sensed images. These images are often compared to ground control points (GCPs) either by using an accurate map (image to map) or using another geo-referenced image (image to ...
M. Asker, O. Abu —ElNasr, B. Shabana, S. Elmougy   +3 more
doaj   +1 more source

Review of calculating the electrical conductivity of mineral aggregates from constituent conductivities

Solid Earth Sciences, 2021
The electrical conductivity of mineral aggregates depends both on the properties of the constitutive minerals and the ways those minerals are assembled.
Kui Han, Simon Martin Clark
doaj   +1 more source

Petrophysical Joint Inversion Applied to Alpine Permafrost Field Sites to Image Subsurface Ice, Water, Air, and Rock Contents

Frontiers in Earth Science, 2020
Quantification of ground ice is crucial for understanding permafrost systems and modeling their ongoing degradation. The volumetric ice content is however rarely estimated in permafrost studies, as it is particularly difficult to retrieve.
Coline Mollaret, Florian M. Wagner, Christin Hilbich, Cristian Scapozza, Christian Hauck   +4 more
doaj   +1 more source

Parameterizations of size distribution and refractive index of biomass burning organic aerosol with black carbon content [PDF]

Atmospheric Chemistry and Physics, 2022
Biomass burning organic aerosol (BBOA) impacts significantly on climate directly through scattering and absorbing solar radiation and indirectly through acting as cloud condensation nuclei.
B. Luo, B. Luo, Y. Kuang, Y. Kuang, S. Huang, S. Huang, Q. Song, Q. Song, W. Hu, W. Li, W. Li, Y. Peng, Y. Peng, D. Chen, D. Yue, B. Yuan, B. Yuan, M. Shao, M. Shao   +18 more
doaj   +1 more source

Physical properties of the African walnut (Tetracarpidium conophorum) from Nigeria

Cogent Food & Agriculture, 2016
In this research about 1,700 samples of the African walnut (Tetracarpidium conophorum) were measured for their axial dimensions, mass, geometric mean, sphericity index, surface area, aspect ratios, angle of repose on steel, wood and glass, porosity, bulk
M.C. Ndukwu, C. Ejirika
doaj   +1 more source

Bias Reduction in Robust Mean–Geometric Mean Linking via SIMEX

Algorithms
Robust mean–geometric mean (MGM) linking is a method for comparing the performance of two groups on a test involving dichotomous items and is particularly suited to settings with fixed and sparse differential item functioning (DIF).
Alexander Robitzsch
doaj   +1 more source

Assessing Standard Error Estimation Approaches for Robust Mean-Geometric Mean Linking

AppliedMath
Robust mean-geometric mean (MGM) linking methods enable reliable group comparisons in item response theory models under fixed and sparse differential item functioning.
Alexander Robitzsch
doaj   +1 more source