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.
The article discusses the prospects of modernization of the author's software «labpraktikum_osnov_wavelet» for studying and analyzing the parameters and characteristics of a semiconductor optical ...amplifier (SOA) by expanding the list of wavelet analysis types in order to select the most informative type of wavelet analysis and wavelet function to interpret the results.
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.
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.
Functionalization of 3-(2-pyridyl)-1,2,4-triazines with small (aza)cyclic compounds (azetidine and cyclopropylamine)
via
nucleophilic
ipso
-substitution of the cyano group and subsequent ...transformation of the 1,2,4-triazine ring into pyridine one
via
the
aza
-Diels—Alder reaction were explored. The successful proceeding of such a transformation depended on the structure of the nucleophilic residue: both steps were successfully implemented upon using a cyclopropylamine derivative, while in the case of azetidine-containing 1,2,4-triazines, there was only the resinification of the reaction mass.
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".
We consider the main problems of metrological support for measurements of speed and bandwidth in digital packet data networks. We enumerate the methods for performing data rate measurements. We ...propose various ways of providing traceability of digital data rate meters such as upgrades to the existing standard GET 200-2012, development of a primary reference method for measuring speed, and the creation of a local verification procedure for measuring the transmission speed of digital information. Recommendations are given for the implementation of the selected method for ensuring traceability of meters for data transfer rate and bandwidth of communication channels. Suggested approaches can apply in metrology for digital communication systems.
PDF
