At present, parallelization technology is a dynamically evolving area in software development. Using parallelization to adapt software to existing multicore and multiprocessor systems, one can ...considerably increase the computational performance and significantly reduce the processing speed for big data arrays. High speed of software operation is important both for real-time data preprocessing and data analysis at all subsequent stages, including data visualization. This is the key requirement for the Large Hadron Collider (LHC) experiments. In this article, the results of using parallelization technology for analyzing LHCb physics data, with the jobs implemented in OSTAP based on pathos and pyROOT, are given.
A simple way of deducing the two-body potential from a given two- or three-body wave function is suggested. This method makes it possible to numerically obtain an unknown potential acting between the ...particles
A
and
B
when we know the potentials of their interaction with a third particle
C
and know the characteristics of the three-body bound state (
ABC
). Using the examples of the systems (
nnp
) and
(
Λ
Λ
α
)
, we show that even very simple three-body wave functions constructed on the basis of the general reasoning and the knowledge of the binding energies and sizes of these systems, allow us to deduce reasonable and realistic
nn
and
Λ
Λ
potentials. Within this approach, any artificially constructed wave function automatically becomes an exact solution of the corresponding Schrödinger equation with the
AB
-potential that the method produces. This fact suggests yet another possible application of this method when the
AB
-potential is known. In such a case we can find a bound state solution of the Schrödinger equation by looking for such values of the free parameters in an artificially constructed wave function that minimize the difference between the deduced and the exact
AB
-potentials.
—
We have studied silicidation of powders of carbide phases in the Ti–Ta–C and Ti–Zr–C systems in a gaseous silicon monoxide atmosphere at 1400°C. The results demonstrate that the silicidation of the ...carbide phases in the Ti–Ta–C and Ti–Zr–C systems has a selective character. Silicidation selectivity shows up in that, in carbide mixtures containing up to 50 mol % TiC, the only siliciding treatment products are zirconium and tantalum silicide phases: ZrSi, Ta
5
Si
3
, and TaSi
2
. At TiC contents of 80 mol % and above in the Ti–Ta–C system, silicidation leads to the formation of the Ti
3
SiC
2
MAX phase.
In this paper, we are going to exhibit the system performance using the single, double and three-electrode quantum-dot semiconductor optical amplifier as an intensity modulator (3E-QD-SOA-IM) of the ...adaptively modulated optical orthogonal frequency division multiplexing (AMOOFDM) signals in the intensity-modulation direct-detection passive optical network (IMDD-PON) systems. Moreover, to compare the bit-rate versus transmission distance of the proposed fiber link model when using both configurations multi-electrode semiconductor optical amplifier intensity-modulator (ME-SOA-IM) and multi-electrode quantum-dot semiconductor optical amplifier intensity-modulator (ME-QD-SOA-IM), to study the improvement of the transmission capacity, distance reach and power efficiency when applying the proposed configurations for optical access networks for distances ranging from 20 km up to 120 km. The three-electrode configuration solved the nonlinearity of the two-electrode configuration and offered a considerably wider range of optimum operating conditions to achieve up to 35 Gbps. Furthermore, the 3E-QD-SOA-IM showed a better performance over the 3E-SOA-IM over all the 120 km, and a 5 Gbps enhancement in the bitrate with a 20 dB less optical input power at 20 km.
Abstract
This paper presents calculations of electronic states in Al
x
Ga
1-x
As semiconductor nanostructures and simulates the envelope wave functions of quantum energy levels in a one-dimensional ...quantum well with infinitely high walls of a given width at various values of
x
. For the analysis of results the authors choose the function
wtmm
from the Matlab library that fixes the extremums and which is a characteristic of the fractality of the envelope wave functions of quantum energy levels.
—
An enhanced-performance composite antifriction material was created based on iron-containing material. Features of the structure formation of glass–metal composite materials produced from carbonyl ...iron powder by powder metallurgy methods were considered. The relationship between the method of fabricating the material and the features of its microstructure was investigated, and so was the relationship between the composition and structure of the resulting composite materials and their properties. The obtained samples were examined by microstructural analysis with a VEGA 3 TESCAN SEM microscope.
—
We examine general aspects of the formation of Ti
3
SiC
2
–TiB
2
–SiC ceramic composites during vacuum carbosilicothermic reduction of titanium oxide mineral raw materials (leucoxene concentrate ...from the Yaregskoe occurrence) in the presence of B
4
C as a boron-containing additive, with SiC as a reducing agent. The effect of starting-mixture composition on the phase composition of the reduction product and the formation of minor phases is analyzed. We demonstrate that, with increasing B
4
C concentration in the starting mixture, the fraction of the forming TiB
2
rises systematically, reaching 48 vol %.
The decays of
→ J/ψΚ
+
Κ
−
π
+
π
−
are studied using a data set corresponding to an integrated luminosity of 9 fb
−1
collected by the LHCb experiment in proton-proton collisions between 2011 and ...2018. The decays
→
and
→χ
с1
(3872)Κ
+
Κ
−
where the Κ
+
Κ
−
pair does not originate from the φ meson are observed for the first time. Precise measurements of the branching fraction ratios between
→
,
→ χ
с1
(3872)φ,
→ ψ(2S)φ and
→ χ
с1
(3872)Κ
+
Κ
−
channels are reported. A structure denoted X(4740) is observed in the J/ψφ mass spectrum with a significance in excess of 5.3 standard deviations. In addition, the most precise measurement of the
meson mass is made.
High-molecular-weight polymers with different contents of propylene carbonate (PC), and trimethylene carbonate (TMC) units in the polymer chain were synthesized by the coordination anionic ...copolymerization of carbon dioxide, propylene oxide (PO), and TMC in supercritical carbon dioxide (scCO
2
). Zinc adipate (ZnAd) was used as a catalyst. The terpolymerization products were characterized by
1
H and
13
C NMR, IR spectroscopy, GPC, and DSC. The effect of the reaction conditions on the yield, composition, structure, and molecular weight and thermal characteristics of the terpolymers was studied. The phase behavior of the synthesized polymers and mixtures of polypropylene carbonate with polytrimethylene carbonate was examined.
The paper presents a technique for applying a wavelet analysis (continuous and discrete wavelet transforms) to analyze the elemental composition of nanostructures in order to identify the chemical ...composition. The experimental data were obtained by means of a scanning electron microscope. The acquisition, processing and study of spectra were carried out using the author's software product "labpraktikum_osnov_wavelet".
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