Results 21 to 30 of about 180,475 (263)
Copy‐paste with self‐adaptation: A self‐adaptive adjustment method based on copy‐paste augmentation
IET Computer Vision, 2023 Data augmentation diversifies the information in the dataset. For class imbalance, the copy‐paste augmentation generates new class information to alleviate the impact of this problem. However, these methods rely excessively on human intuition.
Xiaoyu Yu +4 more
doaj +1 more source
Reducing errors on estimates of the carbon uptake period based on time series of atmospheric CO2 [PDF]
Atmospheric Measurement Techniques, 2023 High-quality, long-time-series measurements of atmospheric greenhouse gases show interannual variability in the measured seasonal cycles. These changes can be analyzed to better understand the carbon cycle and the impact of climate drivers.
T. Kariyathan +6 more
doaj +1 more source
Indicator Selection For Latent Class Models Using Constrained Model Fitting [PDF]
The Egyptian Statistical Journal, 2019 Whist considerable attention has been Paid to determining the number of classes in a latent class analysis less attention has directed at the optimal selection of indicator variables . Indicator selection reduces redundancy and complexity,and can provide
Brian Francis, Fuad A. A. Awwad
doaj +1 more source
Applied Sciences, 2021 This paper proposes an analytical expression set to determine the maximum values of currents and voltages in the Class-E Power Amplifier (PA) with Finite DC-Feed Inductance (FDI) under the following assumptions—ideal components (e.g., inductors and ...
Ingrid Casallas +4 more
doaj +1 more source
暴雨灾害, 2021 Six latitude-longitude rectangular regions were selected (Four is on the 30°N line: around Ya'an, in the southwest of Hubei, in the souther of Jianghan Plain, west Hangzhou Bay.Others are Hainan Island and around Zhengzhou, one is in its south and ...
Tieyuan SHEN +5 more
doaj +1 more source
The Astrophysical Journal Supplement Series, 2023 Open clusters (OCs) are regarded as tracers to understand stellar evolution theory and validate stellar models. In this study, we presented a robust approach to identifying OCs.
Huanbin Chi +3 more
doaj +1 more source
Weakly totally permutable products and Fitting classes [PDF]
International Journal of Group Theory, 2021 It is known that if $ G=AB $ is a product of its totally permutable subgroups $ A $ and $ B $, then $ G\in \mathfrak{F} $ if and only if $ A\in \mathfrak{F} $ and $ B\in \mathfrak{F} $ when $ \mathfrak{F} $ is a Fischer class containing the class ...
Sesuai Madanha
doaj +1 more source
Polarization performance simulation for the GeoXO atmospheric composition instrument: NO2 retrieval impacts [PDF]
Atmospheric Measurement Techniques, 2022 NOAA's Geostationary Extended Observations (GeoXO) constellation will continue and expand on the capabilities of the current generation of geostationary satellite systems to support US weather, ocean, atmosphere, and climate operations.
A. Pearlman +11 more
doaj +1 more source
Quasinormal Fitting classes of finite groups
Журнал Белорусского государственного университета: Математика, информатика, 2019 Let P be the set of all primes, Zn a cyclic group of order n and X wr Zn the regular wreath product of the group X with Zn. A Fitting class F is said to be X-quasinormal (or quasinormal in a class of groups X ) if F ⊆ X, p is a prime, groups G ∈ F and G ...
Anna V. Martsinkevich
doaj +1 more source
Synthesis and Application of Amin-modified Fe3O4@MCM-41 Core-shell Magnetic Mesoporous for Effective Removal of pb2+ ions from Aqueous Solutions and Optimization with Response Surface Methodology [PDF]
Journal of Water and Environmental Nanotechnology, 2018 In this study, a selective, fast and novel magnetic mesoporous silica sorbent Fe3O4@MCM-41-NH2, was synthesized, functionalized and has been used for the removal of Pb+2 ions from aqueous solution.
Kamal Alizadeh +2 more
doaj +1 more source