Results 21 to 30 of about 1,648,870 (357)

Models for magnetospheric mass density and average ion mass including radial dependence

Frontiers in Astronomy and Space Sciences, 2022
Analytical models for magnetospheric mass density, ρm, and average ion mass, M, were created from a database of ρm and electron density, ne, values from six spacecraft missions by making use of the Eureqa nonlinear genetic regression algorithm.
Richard E. Denton, Kazue Takahashi, Kyungguk Min, David P. Hartley, Yukitoshi Nishimura, Matthew C. Digman, Matthew C. Digman   +6 more
doaj   +1 more source

First-principles derivation and properties of density-functional average-atom models

Physical Review Research, 2022
Finite-temperature Kohn-Sham density functional theory (KS-DFT) is a widely-used method in warm dense matter (WDM) simulations and diagnostics. Unfortunately, full KS-DFT-molecular dynamics models scale unfavourably with temperature and there remains ...
T. J. Callow, S. B. Hansen, E. Kraisler, A. Cangi   +3 more
doaj   +1 more source

Cement based foam concrete with aluminosilicate microspheres for monolithic construction

Инженерно-строительный журнал, 2018
The present paper investigates cement foam concrete of natural hardening with aluminosilicate microsphere made from bottom ash waste from Seversk Heat and Power Station in Tomsk Region.
Aleksei Steshenko, Tomsk State University of Architecture and Building   +1 more
doaj   +1 more source

Average density and porosity of high-strength lightweight concrete

Инженерно-строительный журнал, 2014
The analysis results of high-strength lightweight concrete (HSLWC) structure are presented in this paper. The X-ray tomography, optical microscopy and other methods are used for researching of average density and porosity.
A.S. Inozemtcev
doaj   +1 more source

Thermospheric atomic oxygen density estimates using the EISCAT Svalbard Radar [PDF]

, 2013
[1] Coupling between the ionized and neutral atmosphere through particle collisions allows an indirect study of the neutral atmosphere through measurements of ionospheric plasma parameters. We estimate the neutral density of the upper thermosphere above ~
Sutton, E., La Hoz, C., E. Sutton, C. La Hoz, H. Vickers, Ogawa, Y., Y. Ogawa, Vickers, Hannah, Kosch, M. J., M. J. Kosch, Vickers, H., La Hoz, Cesar   +11 more
core   +1 more source

Estimation of Partial derivatives of the average of densities belonging to a family of densities [PDF]

Journal of the Australian Mathematical Society, 1975
Recently, attention has been drawn to the problem of estimation of a k-variate probability density and its partial derivatives of various orders. Specifically, let X1, …, Xn be i.i.d. k-variate random variables with common density f wrt Lebesgue measure μ on the k-dimensional σ-field Bk. Parzen (1962) in the k = 1 case and Cacoullos (1966) in the k ≧ 1
Susarla, V., Kumar, S.
openaire   +2 more sources

Structural and heat-insulating foam concrete for individual monolithic housing construction [PDF]

Нанотехнологии в строительстве
Introduction. The article presents the results of studies of structural and heat-insulating cement-based foam concrete for monolithic individual housing construction using porous aggregates sand and superplasticizers.
Aleksei B. Steshenko, Aleksander I. Kudyakov, Alexandr S. Inozemtcev, Sergei S. Inozemtcev   +3 more
doaj   +1 more source

Average-Based Fuzzy Time Series Markov Chain Based on Frequency Density Partitioning

Journal of Applied Mathematics, 2023
Fuzzy time series (FTS) is one of the forecasting methods that has been developed until now. The fuzzy time series is a forecasting method that uses the concept of fuzzy logic, which Song and Chissom first introduced.
Susilo Hariyanto, Y. D. Sumanto, Siti Khabibah, null Zaenurrohman   +3 more
doaj   +1 more source

Averaging of density kernel estimators

Statistics & Probability Letters, 2020
Averaging provides an alternative to bandwidth selection for density kernel estimation. We propose a procedure to combine linearly several kernel estimators of a density obtained from different, possibly data-driven, bandwidths. The method relies on minimizing an easily tractable approximation of the integrated square error of the combination.
Chernova, O., Lavancier, Frédéric, Rochet, P.   +2 more
openaire   +4 more sources

Renal Replacement Therapy Tactics in Russian Regions with an Average Population Density

Вестник урологии, 2020
The lecture details the current understanding of renal replacement therapy and current advances in this field. The current diagnostic and treatment algorithms have been clarified, allowing timely assistance to the population with chronic kidney disease ...
D. V. Perlin
doaj   +1 more source