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A Density Functional Theory for the Average Electron Energy [PDF]

open access: greenJournal of Chemical Theory and Computation, 2022
A formally exact density functional theory (DFT) determination of the average electron energy is presented. Our theory, which is based on a different accounting of energy functional terms, partially solves one well known downside of conventional Kohn ...
Stefano Racioppi   +3 more
core   +4 more sources

Average energy density and the size of the Universe [PDF]

open access: greenPhysical Review D, 1987
This paper shows that there is a relationship between the maximum volume of any cosmological solution of the Einstein equations and its average energy density.
Niall O’Murchadha
core   +6 more sources

Classifying Breast Density from Mammogram with Pretrained CNNs and Weighted Average Ensembles [PDF]

open access: goldApplied Sciences, 2022
We are currently experiencing a revolution in data production and artificial intelligence (AI) applications. Data are produced much faster than they can be consumed.
Eman Justaniah   +3 more
doaj   +2 more sources

Formation of porous structures in production technology of construction materials based on building gypsum plaster [PDF]

open access: yesНанотехнологии в строительстве, 2023
: Introduction. This article presents the results of the research works on formation of building gypsum plaster porous structure with the use of recovered anhydrite raw materials and chemical additives, and describes a method for production of wall ...
Anna I. Kurmangalieva   +7 more
doaj   +1 more source

Expanded obsidian as composite material for light concretes [PDF]

open access: yesE3S Web of Conferences, 2023
Creation of composite building materials is a way of improvement of certain properties compared with such properties of source components as mechanical, physical, heat-insulating, acoustic, and in addition chemical stability, life span etc., or materials
Paytyan T., Sargsyan T., Kalantaryan M.
doaj   +1 more source

Structural and heat-insulating cement-based concrete with complex glyoxal based additive [PDF]

open access: yesНанотехнологии в строительстве, 2022
: Introduction. The article presents the results of studies of the effect of complex additive based on glyoxal on the properties of cement-based foam concrete mix and foam concrete of natural hardening. The relevance of the study is determined by the
Aleksei B. Steshenko   +3 more
doaj   +1 more source

Controlling the structural formation of porized cement composites in the production of thermally efficient enclosure structures of enhanced quality [PDF]

open access: yesНанотехнологии в строительстве, 2023
ABSTACT: Introduction. Research to improve the quality of foam concrete products through targeted control of technological processes of structure formation of cement-based compositions is relevant.
Aleksei B. Steshenko   +3 more
doaj   +1 more source

Research and Application of Average Density Calculation Method for Particulate Grain Silo for Grain Processing Enterprises

open access: yesLiang you shipin ke-ji, 2023
The average density of particulate grain pile is an important parameter for real-time online measurement of grain stock quantity. In order to solve the problem of calculating the average density of particulate grain pile in the inventory of grain ...
XU Qi-keng   +6 more
doaj   +1 more source

Construction and technical properties of vermiculite concrete and fibro vermiculite concrete with volcanic pumice under the influence of elevated temperatures

open access: yesВестник Дагестанского государственного технического университета: Технические науки, 2023
Objective. Development of compositions of vermiculite concrete and fibro vermiculite concrete with volcanic pumice. Investigation of the construction and technical properties of the developed compositions of vermiculite concrete and fibrovermiculite ...
T. A. Khezhev   +4 more
doaj   +1 more source

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