Results 31 to 40 of about 424,036 (273)

Random distribution of porosity in the combustion space area of underground coal fire

工程科学学报, 2015
Through statistical analysis of random experiments, there is a function of porosity 3lnφ-2ln(1-φ) that approximately follows a normal distribution. In the test particle size range of 30 to 180 ram, the expectation and variance of this function value ...
WANG Shao-feng, LI Xi-bing, WANG De-ming, CAO Kai   +3 more
doaj   +1 more source

The Fourier analysis in inhomogeneous media

St. Petersburg Polytechnical University Journal: Physics and Mathematics, 2023
In the paper, the definition and basic properties of the Fourier transform (FT) are discussed. It has been shown with specific examples that integral solutions of the model inhomogeneous equation, the nonstationary Cauchy problem on an inhomogeneous ...
Gnevyshev Vladimir, Belonenko Tatyana
doaj   +1 more source

Acoustic streaming and its suppression in inhomogeneous fluids [PDF]

, 2017
We present a theoretical and experimental study of boundary-driven acoustic streaming in an inhomogeneous fluid with variations in density and compressibility.
Augustsson, Per, Bruus, Henrik, Karlsen, Jonas T., Qiu, Wei   +3 more
core   +2 more sources

Inhomogeneous dark energy [PDF]

Journal of Cosmology and Astroparticle Physics, 2016
11 ...
Chamseddine Ali H., Mukhanov Viatcheslav
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Inhomogeneous Electron Gas [PDF]

Physical Review, 1964
This paper deals with the ground state of an interacting electron gas in an external potential $v(\mathrm{r})$. It is proved that there exists a universal functional of the density, $F[n(\mathrm{r})]$, independent of $v(\mathrm{r})$, such that the expression $E\ensuremath{\equiv}\ensuremath{\int}v(\mathrm{r})n(\mathrm{r})d\mathrm{r}+F[n(\mathrm{r ...
Hohenberg, P., Kohn, W.
openaire   +2 more sources

High-Fidelity Inhomogeneous Ground Clutter Simulation of Airborne Phased Array PD Radar Aided by Digital Elevation Model and Digital Land Classification Data

Sensors, 2018
This paper presents a high-fidelity inhomogeneous ground clutter simulation method for airborne phased array Pulse Doppler (PD) radar aided by a digital elevation model (DEM) and digital land classification data (DLCD).
Hai Li, Jie Wang, Yi Fan, Jungong Han
doaj   +1 more source

Research on welding-induced inhomogeneous stress in thick plate EH40 butt joint considering phase transformation

Journal of Materials Research and Technology, 2022
In this work, the inhomogeneous residual stress distribution and evolution of thick plate in single-pass full penetration laser welding are systematically investigated using phase transformation model.
Ruolin Wu, Yu Huang, Youmin Rong, Jiajun Xu   +3 more
doaj   +1 more source

Modeling of contact interaction of a heated plane rigid elliptical punch with a transversally isotropic elastic half-space

Sistemnì Doslìdženâ ta Informacìjnì Tehnologìï, 2020
On the base of a rigorous mathematical model, the problem of the contact interaction of a heated flat punch of an elliptical section with a transversely isotropic elastic half-space is investigated.
Vitaly S. Kirilyuk, Olga I. Levchuk, Olena V. Gavrilenko, Mykhailo B. Viter   +3 more
doaj   +1 more source

Spontaneous supersymmetry breaking in inhomogeneous supersymmetric field theories and BPS vacua

Journal of High Energy Physics, 2023
We study spontaneous supersymmetry breaking in inhomogeneous extensions of N $$ \mathcal{N} $$ = 1 supersymmetric field theory models in 4-dimensions.
Yoonbai Kim, O-Kab Kwon, D. D. Tolla
doaj   +1 more source

Inhomogeneity-induced superconductivity? [PDF]

Europhysics Letters (EPL), 2000
A t-J-like model for inhomogeneous superconductivity of cuprate oxides is presented, in which local anisotropic magnetic terms are essential. We show that this model predicts pairing, consistent with experiments, and argue how the macroscopic phase-coherent state gradually grows upon lowering of the temperature. We show that appropriate inhomogeneities
Eroles, J., Ortiz, G., Balatsky, A. V., Bishop, A. R.   +3 more
openaire   +2 more sources