Results 21 to 30 of about 1,572,659 (339)

Radar Echo Spatiotemporal Sequence Prediction Using an Improved ConvGRU Deep Learning Model

open access: yesAtmosphere, 2022
Precipitation nowcasting is extremely important in disaster prevention and mitigation, and can improve the quality of meteorological forecasts. In recent years, deep learning-based spatiotemporal sequence prediction models have been widely used in ...
Wei He   +6 more
doaj   +1 more source

The Influence Function of Penalized Regression Estimators [PDF]

open access: yes, 2014
To perform regression analysis in high dimensions, lasso or ridge estimation are a common choice. However, it has been shown that these methods are not robust to outliers.
Alfons, Andreas   +2 more
core   +2 more sources

Numerical simulation of smoke natural filling in ultra-thin and tall atrium

open access: yesCase Studies in Thermal Engineering, 2021
In this paper, the natural filling law of smoke in ultra-thin and tall atrium was studied by means of numerical simulations. The results show that, the axial plume velocity of the ultra-thin and tall atrium has a good exponential function dependence on ...
Jiuzhu Wang, Cuifeng Du, Hao Zhang
doaj   +1 more source

Measuring the mass of a sterile neutrino with a very short baseline reactor experiment [PDF]

open access: yes, 2007
An analysis of the world's neutrino oscillation data, including sterile neutrinos, (M. Sorel, C. M. Conrad, and M. H. Shaevitz, Phys. Rev. D 70, 073004) found a peak in the allowed region at a mass-squared difference $\Delta m^2 \cong 0.9$ eV$^2$.
D. C. Latimer   +5 more
core   +2 more sources

Harnessing speckle for a sub-femtometre resolved broadband wavemeter and laser stabilization

open access: yesNature Communications, 2017
The complex speckle pattern produced by coherent multiple scattering contains information about the incident light field, which has recently been used for imaging. Metzgeret al. use speckle to construct a wavemeter with sub-femtometre resolution which is
Nikolaus Klaus Metzger   +7 more
doaj   +1 more source

On square roots of M-matrices

open access: yesLinear Algebra and its Applications, 1982
AbstractThe question of the existence and uniqueness of an M-matrix which is a square root of an M-matrix is discussed. The results are then used to derive some new necessary and sufficient conditions for a real matrix with nonpositive off diagonal elements to be an M-matrix.
Alefeld, G., Schneider, N.
openaire   +2 more sources

Meromorphic traveling wave solutions of the complex cubic-quintic Ginzburg-Landau equation [PDF]

open access: yes, 2012
We look for singlevalued solutions of the squared modulus M of the traveling wave reduction of the complex cubic-quintic Ginzburg-Landau equation. Using Clunie's lemma, we first prove that any meromorphic solution M is necessarily elliptic or degenerate ...
A.E. Eremenko   +26 more
core   +4 more sources

Supervised Machine Learning for Refractive Index Structure Parameter Modeling

open access: yesQuantum Beam Science, 2023
The Hellenic Naval Academy (HNA) reports the latest results from a medium-range, near-maritime, free-space laser-communications-testing facility, between the lighthouse of Psitalia Island and the academy’s laboratory building. The FSO link is established
Antonios Lionis   +5 more
doaj   +1 more source

The Casson invariant and the word metric on the Torelli group [PDF]

open access: yes, 2007
We bound the value of the Casson invariant of any integral homology 3-sphere $M$ by a constant times the distance-squared to the identity, measured in any word metric on the Torelli group $\T$, of the element of $\T$ associated to any Heegaard splitting ...
Akbulut   +7 more
core   +5 more sources

Combating outliers and multicollinearity in linear regression model using robust Kibria-Lukman mixed with principal component estimator, simulation and computation

open access: yesScientific African, 2023
Scholars usually adopt the method of least squared to model the relationship between a response variable and two or more explanatory variables. Ordinary least squares estimator's performance is good when there is no outliers and multicollinearity in the ...
K.C. Arum   +5 more
doaj   +1 more source

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