Prohlížení Acta Polytechnica. 2022, vol. 62 dle názvu
Zobrazují se záznamy 44-63 z 66
-
On generalized Heun equation with some mathematical properties
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)We study the analytic solutions of the generalized Heun equation, (α0 + α1 r + α2 r2 + α3 r3) y′′ + (β0 + β1 r + β2 r2) y′ + (ε0 + ε1 r) y = 0, where |α3| + |β2|≠ 0, and {αi}3i=0, {βi}2i=0, {εi}1i=0 are real parameters. ... -
On some algebraic formulations within universal enveloping algebras related to superintegrability
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)We report on some recent purely algebraic approaches to superintegrable systems from the perspective of subspaces of commuting polynomials in the enveloping algebras of Lie algebras that generate quadratic (and eventually ... -
On the Wess-Zumino Model: a supersymmetric field theory
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)We consider the free massless Wess-Zumino Model in 4D which describes a supersymmetric field theory that is invariant under the rigid or global supersymmetry transformations where the transformation parameter ϵ (or ϵ ) ... -
Orthonormal polynomial projection quantization: an algebraic eigenenergy bounding method
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The ability to generate tight eigenenergy bounds for low dimension bosonic or ferminonic, hermitian or non-hermitian, Schrödinger operator problems is an important objective in the computation of quantum systems. Very few ... -
Parametric study of the energy potential of a building’s envelope with integrated energy-active elements
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Building structures with integrated energy-active elements (BSIEAE) present a progressive alternative for building construction with multifunctional energy functions. The aim was to determine the energy potential of a ... -
Performance assessment of steel truss railway bridge with curved track
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Non-destructive Structural Health Monitoring techniques can be incorporated into bridge integrity management by assessing structural conditions. This paper describes a performance assessment of a steel truss railway bridge ... -
Performance of a hydromagnetic squeeze film on a rough circular step bearing: a comparision of different porous structures
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This investigation deals with a comparative analysis of the impact of spongy structure based on the model of Kozeny-Carman and Irmay on a hydromagnetic squeeze film in a rough circular step bearing. Christensen and Tonder’s ... -
Photonic graphene under strain with position-dependent gain and loss
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)We work with photonic graphene lattices under strain with gain and loss, modeled by the Dirac equation with an imaginary mass term. To construct such Hamiltonians and their solutions, we use the free-particle Dirac equation ... -
Quantization of rationally deformed Morse potentials by Wronskian transforms of Romanovski-Bessel polynomials
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The paper advances Odake and Sasaki’s idea to re-write eigenfunctions of rationally deformed Morse potentials in terms of Wronskians of Laguerre polynomials in the reciprocal argument. It is shown that the constructed ... -
Quantum description of angles in the plane
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The real plane with its set of orientations or angles in [0, π) is the simplest non trivial example of a (projective) Hilbert space and provides nice illustrations of quantum formalism. We present some of them, namely ... -
Rational extension of many particle systems
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In this talk, we briefly review the rational extension of many particle systems, and is based on a couple of our recent works. In the first model, the rational extension of the truncated Calogero-Sutherland (TCS) model is ... -
Recommended procedure for headroom design according to geometric parameters of building structures
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The system of Czech technical standards for geometric accuracy assumes that the designer determines the functional geometric parameters for a specific building. By calculation, he verifies them in the so-called “geometric ... -
Reduction of pavement thickness using a subgrade layer treated by different techniques
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)A range of stabilisers for poor quality subgrade soils have been developed to promote road constructions. Many of them are becoming more popular depending on their effectiveness. The purpose behind this research is to ... -
Results of research on backlash compensation in a power electric drive by low-power electronic device
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This article considers the feasibility of restoring and maintaining the kinematic accuracy of the support-rotary device drives by introducing a backlash compensation device into the control system. The power electromechanical ... -
Stone Topography – Useful Tool in Monuments Restoration Process
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The surface of building stone on historic buildings often bears the original traces of craftsmanship processing. These are an integral part of the visual appearance of the monument and thus its value, which needs to be ... -
Study of surface roughness with MHD and couple stress fluid on porous curved annular plates
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The purpose of this article is to examine the effect of surface roughness on porous curved annular plates lubricated with couple stress fluid in the presence of magnetic field. The MHD-Stochastic Reynolds equation is derived ... -
Swanson Hamiltonian revisited through the complex scaling method
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In this work, we study the non-hermitian PT-symmetry Swanson Hamiltonian in the framework of the Complex Scaling Method. We show that by applying this method we can work with eigenfunctions that are square-integrable both ... -
The engineering performance of eco-friendly concretes containing diatomite fly ash and ground granulated blast furnace slag
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Approximately 10 % of CO2 is emitted from an ordinary Portland cement production. In cement and concrete production, CO2 emissions can be greatly reduced by using Supplementary Cementitious Materials (SCMs). In addition, ... -
Theoretical analysis of the influence of the chevron inclination angle on the thermal performance of a gasket plate heat exchanger
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Different models are applied for an experimental and theoretical determination of the thermal and hydraulic performance of gasket plate heat exchanger. One of the relevant aspects of recent works is the influence of the ... -
Theoretical and experimental study of water vapour condensation with high content of non-condensable gas in a vertical tube
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This article deals with the possibility of separating water vapour from flue gases after oxyfuel combustion using condensation processes. Those processes can generally be described as condensation of water vapour in the ...