bluuebunny/crossref_metadata_2025 huggingface dataset:
Rapid generation of functional engineered 3D human neuronal assemblies: network dynamics evaluated by micro-electrodes arrays
Authors: Muzzi L , Di Lisa D , Arnaldi P , Aprile D , Pastorino L , Martinoia S , Frega M
Published: November 2021

Objective. In this work we adapted a protocol for the fast generation of human neurons to build 3D neuronal networks with controlled structure and cell composition suitable for systematic electrophysiological investigations. Approach. We used biocompatible chitosan microbeads as scaffold to build 3D networks and to ensure nutrients-medium exchange from the core of the structure to the external environment. We used excitatory neurons derived from human-induced pluripotent stem cells (hiPSCs) co-cultured with astrocytes. By adapting the well-established NgN2 differentiation protocol, we obtained 3D engineered networks with good control over cell density, volume and cell composition. We coupled the 3D neuronal networks to 60-channel micro electrode arrays (MEAs) to monitor and characterize their electrophysiological development. In parallel, we generated two-dimensional neuronal networks cultured on chitosan to compare the results of the two models. Main results. We sustained samples until 60 d in vitro (DIV) and 3D cultures were healthy and functional. From the structural point of view, the hiPSC derived neurons were able to adhere to chitosan microbeads and to form a stable 3D assembly thanks to the connections among cells. From a functional point of view, neuronal networks showed spontaneous activity after a couple of weeks. Significance. We presented a particular method to generate 3D engineered cultures for the first time with human-derived neurons coupled to MEAs, overcoming some of the limitations related to 2D and 3D neuronal networks and thus increasing the therapeutic target potential of these models for biomedical applications.
Understanding core heavy impurity transport in a hybrid discharge on EAST
Authors: Shi Shengyu , Chen Jiale , Bourdelle Clarisse , Jian Xiang , Odstrčil Tomáš , Garofalo Andrea M. , Cheng Yunxin , Chao Yan , Zhang Ling , Duan Yanmin , Wu Mingfu , Ding Fang , Qian Jinping , Gao Xiang
Published: November 2021

The behavior of heavy/high-Z impurity tungsten (W) in the core of hybrid (high normalized beta β
N plasmas) scenario on EAST with international thermonuclear experimental reactor-like divertor is analyzed. W accumulation is often observed and seriously degrades the plasma performance (Gao et al 2017 Nucl. Fusion
57 056021). The dynamics of the W accumulation process of a hybrid discharge are examined considering the concurrent evolution of the background plasma parameters. It is found that the toroidal rotation and density peaking of the bulk plasma are usually large in the central region, which is particularly prone to the W accumulation. A time slice during the W accumulation phase is modeled, accounting for both neoclassical and turbulent transport components of W, through NEO with poloidal asymmetry effects induced by toroidal rotation, and TGLF, respectively. This modeling reproduces the experimental observations of W accumulation and identifies the neoclassical inward convection/pinch velocity of W due to the large density peaking of the bulk plasma and toroidal rotation in the central region as one of the main reasons for the W accumulation. In addition, the NEO + TGLF + STRAHL modeling can not only predict the core W density profile but also closely reconstruct the radiated information mainly produced by W in the experiment.
TEM in toroidal plasmas with anisotropic electron temperature
Authors: Yao Y. , Liu S.F. , Zhu K.E. , Kong W. , Li J.Q. , Dong J.Q.
Published: November 2021

Trapped electron modes (TEMs) in tokamak plasmas with anisotropies of electron temperature and its gradient are studied by solving the gyrokinetic integral eigenmode equation. Detailed numerical analyses indicate that, in comparison with that in plasmas of isotropic electron temperature, TEMs are enhanced (weakened) by the anisotropy with temperature in the direction perpendicular to magnetic field higher (lower) than that in the direction parallel to the magnetic field when the latter is kept constant. However, the enhancement is limited such that TEMs are weakened rapidly and even stabilized when the anisotropy is higher than a critical value owing to an effective reduction of bounce movement of the trapped electrons. In addition, it is found that the gradients of perpendicular and parallel temperatures of electrons have driving and suppressing effects on the TEMs, respectively. The overall effects of the temperature gradients of electrons and ions, magnetic shear, safety factor, and density gradient on TEMs in the presence of the anisotropies are presented in detail.
The Study of the 22Ne(α,γ)26Mg Reaction at LUNA
Authors: Piatti D.
Published: November 2021

The 22Ne(α,γ)26Mg reaction is the competitor of the 22Ne(α,γ)25Mg reaction, an effective neutron source for element synthesis through s-process in massive and AGB stars. Currently the ratio between the rates of these two reactions is poorly constrained because of the high uncertainty affecting the 22Ne(α,γ)26Mg reaction rate. Indeed a wide range of values for the 395 keV resonance strength (10−15 - 10−9 eV) is reported in literature, all of them from indirect measurements. The present study represents the first direct measurement which was performed at the ultra-low background LUNA laboratory. An high efficiency detector was installed at the gas target beamline of LUNA 400kV accelerator and the 99% enriched in 22Ne neon gas was irradiated with a 399.9 keV α-beam. No significant signal was detected in the 22Ne(α,γ)26Mg region of interest, thus an upper limit for the 395 keV resonance strength was estimated. A new campaign was completed in August 2019 with an improved setup and some details are reported here.
New COMPASS results on kaon multiplicities from SIDIS
Authors: Kabuß E-M
Published: November 2021

Preliminary COMPASS results on kaon multiplicities produced in semi-inclusive deep inelastic scattering of 160 GeV muons off a pure proton target are presented. The results constitute a data set of more than 600 data points, covering a large x, Q
2 and z domain in a fine binning with W > 5GeV/c2. The results from the sum of the z-integrated multiplicities M(K+)+M(K−) are presented versus x and compared to earlier COMPASS results on a deuteron target and to other experiments.

In addition, we show the K−/K+ as well as

p
¯

/p multiplicity ratios measured for hadrons carrying a large fraction z of the virtual-photon energy, 0.5 < z < 1. The data were obtained using a 160 GeV muon beam and an isoscalar 6LiD target. For values of z larger than 0.8, the results contradict expectations obtained using the formalism of (next-to-) leading order perturbative quantum chromodynamics. In particular the data show a strong dependence upon the missing mass Mx
, not expected from the calculations. The results suggest that additional corrections to the formalism may be required to take into account the phase space available for hadronization.
Measurement of Longitudinal Single-Spin Asymmetry for W± Production in Polarized Proton+Proton Collisions at STAR
Authors: Xu Qinghua
Published: November 2021

The contribution from the sea quark polarization to the nucleon spin is an important piece for the complete understanding of the nucleon spin structure. The production of W
± bosons in longitudinally polarized p+p collisions at the RHIC collider at Brookhaven National Laboratory provides a unique probe of the sea quark polarization, through the parity-violating single-spin asymmetry, AL
. At the STAR experiment, the W bosons that decay through the W → ev channel at mid-rapidity (|η <1.3) can be effectively determined with the Electromagnetic Calorimeters and Time Projection Chamber. The STAR measurements of AL
for W boson from datasets taken in 2011 and 2012 at

s

=510 GeV have been included in the global analysis of polarized parton distribution functions, and provided significant constraints on the helicity distribution functions of

u
¯

and

d
¯

quarks. The final AL
results from 2013 STAR data sample are reported, which is about three times larger than the total integrated luminosity of previous years. The combined results of AL
for 2011-2013 data are also given. A flavor asymmetry of light sea quark helicity distribution,

Δ

u
¯

(
x
)
 
−
 
Δ

d
¯

(
x
)
>
0

, is confirmed from a re-weighting of global analysis NNPDFpol1.1 after including the new AL results. In addition, results on the double-spin asymmetries ALL
for W
±, and AL
for Z/γ* production are also reported.
Morphological and magnetic features of columnar nanostructures CuO
Authors: Ushakov A V , Karpov I V , Fedorov L Yu , Demin V G
Published: November 2021

Columnar nanostructures (CNS) were grown by plasma chemical synthesis at a gas mixture pressure of 90% He + 10% O2 200 Pa and substrate temperatures of 340K (sample 1) and 370K (sample 2). The effect of substrate temperature on the morphological, crystalline, magnetic, and impedance properties of CNS was studied. Scanning microscopy (SEM) showed that the morphology of CNS varies significantly from dendritic to wire structure. Energy dispersive X-ray spectroscopy (EDS) showed a change in the stoichiometry of the deficiency samples (Cu52O48) to an excess of oxygen (Cu42O58). X-ray diffraction analysis (XRD) and Rietveld fitting showed that samples 1 and 2 have a monoclinic crystal structure with a large proportion of the amorphous phase, the size of coherent scattering regions (CSR) was 26 nm (sample 1). Magnetic measurements showed that sample 1 exhibits ferromagnetic behavior, and at 6 K a magnetic hysteresis loop appears. Sample 2 from 250 K to room temperature exhibits diamagnetic behavior. A connection was found between the appearance of diamagnetism and a jump in the dielectric constant of sample 2. An assumption was made about the electron-ionic nature of the diamagnetism of sample 2.
Using silver nanoparticles for the increase of YAG: Ce luminescence
Authors: Kravtsov A A , Chikulina I S , Kichuk S N , Tarala V A , Nikova M S , Devitsky V
Published: November 2021

In this study, silver nanoparticles with an average diameter of 50-70 nm were synthesized by the chemical reduction method. Subsequently, nanoparticles in different concentrations were introduced into the YAG: Ce luminescent powder synthesized by the method of two-stage coprecipitation into hexamine. The luminescence of samples with different contents of nanosilver was investigated. It was shown that the direct addition of nanosilver to YAG: Ce significantly impairs luminescence. Upon calcination at 900 °C, an increase in the luminescence of the YAG: Ce samples with silver nanoparticles was observed; however, the luminescence intensity was lower than that of the reference sample (without nanosilver). After calcination in an inert atmosphere at a temperature of 1550 °C, a significant increase in the luminescence intensity (of the order of 30-40 %) of the samples with the addition of a nanosilver was observed in comparison with the reference sample. Thus, silver nanoparticles can be successfully used to improve the YAG: Ce phosphors.
Spectral and structural properties of clotting factor proteins under mechanical stress
Authors: Aleksakhina E L , Parfenov A S , Priyatkin D A , Fomina N A , Tomilova I K
Published: November 2021

The fluorescence data obtained from BODIPY molecular sensors prove the increase of hydrophobicity of blood plasma proteins, fibrinogen, after in vitro and in vivo pressure episodes, which indicates conformational changes in the structure of the fibrinogen due to the phase transition from α-helices to β-sheets in its superspirals. The phase transition in the supramolecular structure of fibrinogen provides greater hydrophobicity of fibrin, intensifying the visible crystallinity of the fibrin clot observed by infrared spectroscopy, scanning electron microscopy and X-ray imaging.
Simulation of turbulent flow over the hill
Authors: Kurbanaliev A Y , Turganbaeva A B , Berdibekova K T , Bokoev K A
Published: November 2021

An airflow around a hilly area is simulated by numerically solving the Reynolds-averaged Navier-Stokes equations within the open OpenFOAM 2006 package. To simulate turbulence, standard turbulence models implemented in OpenFOAM 2006 were used together with wall functions. The results of numerical calculations were compared to the numerical data obtained using the CFL3D and FUN3D packages.
Matching of generators and gas-discharge loads with radio frequency pumping
Authors: Samoylov S A , Samoylov V S , Al Tahar I A , Tsvetkova E A
Published: November 2021

The article considers the problem of matching power high-frequency generators and gas discharge loads. Variants of various types of tunable matching circuits are proposed. A method of adaptive continuous tuning is described and a variant of implementing tunable elements on varicaps is proposed.
Nanoscale Schottky diodes for studying the activity of aluminum nanoparticles in reaction with water
Authors: Nedrygailov I , Chernova N I , Osliakova I V
Published: November 2021

Hydrogen is a promising fuel for energy storage, transportation, production and consumption. At the same time, hydrogen in its pure form is not found on Earth in large quantities and therefore it is necessary to develop a technology for its production. One of the promising technologies for hydrogen production is the reaction of aluminum nanoparticles with water. At the same time, experimental studies of the elementary mechanisms of this reaction are difficult due to the aggressive properties of a concentrated alkaline solution, which is used to activate the aluminum surface. Here we show that the kinetics of the aluminum-water reaction can be monitored in real time using a Schottky nanodiode sensor, provided that the characteristic size of the nanodiode electrodes does not exceed 10 nm. The investigated nanoparticles are applied to the sensor surface by means of nanofabrication. The charge generated in the aluminum nanoparticles as a result of the reaction creates an electrical signal that is proportional to the rate of the chemical process. This makes it possible to use this technology to study the activity even of small groups of nanoparticles, when the volume of released hydrogen is insufficient to measure the reaction rate.
Modeling of the combustion process of methane hydrate taking into account the kinetics of the decomposition process
Authors: Chiglintseva A S , Gimaltdinov I K , Bayanov I M , Stolpovsky M V
Published: November 2021

This paper presents a mathematical model of the combustion process of methane gas hydrate in a closed volume, taking into account the kinetics of its decomposition. The system of basic equations, which includes the equations of conservation of mass (for the entire mixture of gases and each component separately), momentum and energy, is supplemented by the conditions for the balance of mass and heat at the boundary of the phase transition. In this case, the dominant factor determining the intensity of hydrate decomposition is the Arrhenius-type kinetics and conductive heat transfer. Based on the numerical solution of the obtained system of equations based on the method of large particles, the temperature and concentration fields of the system are obtained and analyzed. It is shown that at the initial moment of time, the rate of decomposition of the hydrate according to the model that takes into account the kinetics of the decomposition process is higher than that according to the model that does not take it into account.
Signal processing of nonlinear dynamic systems
Authors: Sarkisov S V , El-Salim S Z , Bondarev A V , Korpusov A N , Putilin P A
Published: November 2021

The paper considers Hermite polynomials that act as a self-similar basis for the decomposition of functions in phase space. It is shown that the equations of behavior of nonlinear dynamical systems are simplified. It is also noted that the wavelet decomposition over Hermite polynomials reduces the number of approximation coefficients and improves the quality of approximation.
Radar range in multi-target mode
Authors: Kuptsov V D , Ivanov S I , Fedotov A A , Badenko V L
Published: November 2021

The paper presents the theoretical simulation results of mmWave frequency modulated continuous wave (FMCW) radars in multi-target mode. The speed of objects is determined by a segment of constant frequency, and the ranges are determined twice - by the first and second chirps of long duration, but with different deviations and frequency rise steepness. The method consists in the fact that the proposed functional with the correct speed-range pair has a minimum, which allows you to select the correct speed-range pair from the sets of speeds and ranges of all targets. The dependence of probability of multiple targets speed and range correct determination in the multi-target mode on the range of the FMCW radar has been investigated. The results can be used by developers to design optimized radars.
High-voltage pulse rise time decreasing using transmission coaxial and spiral lines with ferrite
Authors: Sobyanin R K , Romanchenko I V , Afanasyev K V
Published: November 2021

This article presents the results of a study of the formation of a short rise time of a powerful nanosecond 410 kV pulse. Ferrite filled coaxial transmission lines with standard inner conductor and construction in the form of a spiral are designed. The sharpening of the pulse occurs due to the appearance of an electromagnetic shock wave in the ferrite. The value of the rise time at the level of 0.1 - 0.9 has been decreased from 4.5 to 2.5 ns.
Two problems of movement of multi-link wheeled vehicles
Authors: Mikishanina E A
Published: November 2021

The paper presents the results of a study of the dynamics of multi-link wheeled vehicles with nonholonomic connections superimposed on this mechanical system. The article is of an overview nature. The mathematical formulation is a system of ordinary differential equations of motion in the form of Lagrange with undefined multipliers, solved together with derivatives of nonholonomic constraints. The results are presented in the case of controlled motion, when the law of motion of the first link is known, as well as in the case of uncontrolled motion, when the law of motion of the leading link is also the desired function of time. General equations are obtained for a mechanical system consisting of an arbitrary number of links. Numerical results are presented for the case of three coupled trolleys. The software package Maple was used to perform numerical calculations and plotting of the desired mechanical parameters.
Measures of shape for the generalized beta exponential distribution
Authors: Polosin V G
Published: November 2021

This paper contains parametric and informational measures of shape for various families of the generalized beta exponential distribution since it is important to determination of the distribution shape for analysing an experimental data set. A logistic parameter is used to select independent types of beta exponential distributions, that it allows to combine the distributions of different subfamilies. In this paper the use of parametric shape measures to predefine distribution shape is discusses. In particular, the initial and standard central moments for the main types of generalized beta exponential distribution are given. In the paper it is proposes to use the entropy coefficient of unshifted distribution as an independent information measure of the shape of unshifted generalized beta exponential distributions. In order to increase the reliability of the preliminary determination of the shape of the model, expressions for the entropy coefficient of shifted families both the generalized beta exponential distributions of the first and second types, and the generalized gamma exponential distribution were obtained. For practical applied the entropy coefficients of unshifted distributions for various subfamilies of generalized beta exponential distributions can be useful.
Radiopulse generation in dispersive nonlinear transmission lines with GaAs S-diodes
Authors: Maltsev S N , Konev V Yu , Barmin V V , Romanchenko I V , Prudaev I A
Published: November 2021

The article discusses the regularities that increase the efficiency of generation of microwave oscillations in nonlinear dispersive lines with commutation diodes. GaAs semiconductor structures were used as switching diodes. The results of numerical simulations and experiments are presented, showing that the amplitude of microwave oscillations in the line increases with decreasing oscillation frequency.
Development of technology of high-speed digital-to-analogue converters to improve the efficiency of direct digital synthesis of radio-frequency signals
Authors: Romashov V V , Doktorov A N , Yakimenko K A , Khramov K K
Published: November 2021

The importance of high-speed digital-to-analogue converters for the synthesis of high-frequency coherent signals is shown. A review of the main specialized modes of operation of high-speed digital-to-analogue converters is carried out, which make it possible to effectively use the side components of the spectrum that arose during the restoration of a signal from digital to analogue form. An RF2 reconstruction mode with a modified bipolar pulse sequence is proposed, which makes it possible to increase the amplitude of the images in the eighth and ninth Nyquist zones.
Numerical analysis of the influence of vortex acoustic flows on the efficiency of agglomeration
Authors: Khmelev Vladimir N , Shalunov Andrey V , Golykh Roman N , Nesterov Viktor A
Published: November 2021

It is known and experimentally proven many times that ultrasonic vibrations in the gas phase contribute to the appearance of stationary acoustic flows. Since the flows are caused by energy losses during absorption of oscillations, and they do work against the frictional forces that cause this absorption, then these flows have a vortex character. According to numerous studies and developments in the field of inertial dust separation, at a centripetal acceleration of 10 m/s2 or more, local compaction of particles is observed near the periphery of the vortex flow. Due to this, particles are captured in existing devices based on the inertial dust separation principle. In this regard, the article presents the results of theoretical studies of the potential for the use of acoustic flows for a local increase in the concentration of particles and, consequently, an increase in the efficiency of agglomeration. A model of the influence of vortex acoustic flows on the efficiency of agglomeration is proposed. As a result of the numerical analysis of the model, the fundamental possibility of a significant (more than 4 times) increase in the efficiency of ultrasonic agglomeration of submicron particles due to the formation of vortex acoustic flows in the resonant intervals was revealed.
Applied aspects of data mining for decision support at the regional health system
Authors: Rapakov G G , Sukonshchikov A A , Shvetsov A N , Gorbunov V A , Kravets O Ja
Published: November 2021

The article presents the results of research of Data Mining methods with Microsoft SQL Server. Microsoft Clustering algorithm was used for improving the effectiveness of medical prevention and treatment in a cohort of patients with arterial hypertension. There are rationales for monitoring of cardiovascular risk and desire to correct the risk with Data Mining at medical decision support systems. Authors used medical and sociological monitoring data from regional clinical hospital. The segmentation of arterial hypertension patients was performed using Microsoft Clustering algorithm. As a result, a quantitative assessment of the population profile for patients with arterial hypertension was obtained. The authors presented diagrams and profiles of clusters. They were compared. The developed approach is applied for decision support at regional health information management system for reduce of cardiovascular risk.
Artificial intelligence in medical imaging
Authors: Abbasov I B
Published: November 2021

This review focuses on current research in medical imaging using artificial intelligence. The application of these technologies in relation to the study of the cardiovascular system is considered. The topic of modern works using X-ray studies, nuclear cardiology, echocardiography, magnetic resonance and computed tomography is analyzed. The increasing influence of modern mobile technologies is emphasized, allowing to remove, transfer medical data to a remote expert for diagnosis. The stages of medical imaging are presented, works are described on the implementation of an artificial neural network in medical imaging, the stages of deep learning in the field of radiology. Works on the technical aspects of the use of threedimensional printing in heart diseases are presented, modern three-dimensional models with physiological qualities can have a prospect of application. Also noted are works devoted to the use of virtual reality in the study of the anatomy of the heart. These technologies will allow doctors to timely select the means and treatment method for effective interaction with the patient.
Automatic control of the distribution of tasks under conditions of uncertainty with the use of adaptive approach
Authors: Zhigalov E , Ozerova M I
Published: November 2021

The subject of this article is the development of an adaptive approach for the optimal distribution of problems among solvers in conditions of uncertainty. Despite the large amount of research related to the construction of solutions for automatic control of task distribution, this issue remains relevant. As an alternative approach, a multi-level adaptive algorithm is proposed, which at each level filters incoming tasks according to solution methods, thereby significantly reducing the computational load. A distinctive feature of this algorithm is taking into account the time of task preprocessing, in particular, related to the current load of solvers and the distribution of tasks by solvers, in accordance with the maximum load.
Distributed intelligent measuring and information system for monitoring coastal environmental parameters
Authors: Bezgin A A , Motyzhev S V , Lunev E G , Tolstosheev A P , Gimpilevich Yu B
Published: November 2021

The article presents the results of the study of ways to create distributed measuring networks to control the parameters of the surrounding coastal marine environment and atmosphere. The device, the principle of operation and the measuring capabilities of the meteorological station and the measuring buoy are considered. An example of an intelligent hydrometeorological adaptive system for controlling the parameters of the coastal water area is presented.
Compartmental spiking neuron model for pattern classification
Authors: Astapova L A , Korsakov A M , Bakhshiev A V , Eremenko E A , Smirnova E Yu
Published: November 2021

One of the directions of development within the framework of the neuromorphic approach is the development of anatomically similar models of brain networks, taking into account the structurally complex structure of neurons and the adaptation of connections between them, as well as the development of learning algorithms for such models. In this work, we use the previously presented compartmental spike model of a neuron, which describes the structure (dendritic tree, soma, synapses) and behaviour (temporal and spatial signal summation, generation of action potential, stimulation and suppression of electrical activity) of a biological neuron. An algorithm for the structural organization of neuron models into a spike neural network is proposed for recognizing an arbitrary impulse pattern by introducing inhibitory synapses between trained neuron models. The dynamically adapting neuron models used are trained according to a previously proposed algorithm that automatically selects parameters such as soma size, dendrite length, and the number of synapses on each of the dendrites in order to induce a temporal response at the output depending on the input pattern encoded using a time window and temporal delays in the vector of single spikes arriving at a separate dendrite of a neuron. The developed algorithms are evaluated on the Iris dataset classification problem with four training examples from each class. As a result of the classification, separate disjoint clusters are formed, which demonstrates the applicability of the proposed spike neural network with a dynamically changing structure of elements in the problem of pattern recognition and classification.
The method for detecting network attacks based on the neuroimmune approach
Authors: Chastikova V A , Mitugov A I
Published: November 2021

The given paper proposes a procedure for detecting network attacks based on a hybrid model that combines deep learning methods and artificial immune systems and increases the efficiency of network traffic analysis. During the development process, the constituent components of a hybrid system for identifying network incidents have been specified with a preceding analysis of existing approaches to its construction. Conceptual architectures of the intrusion detection system have been proposed, functional simulation and data flow simulation for the system comprehensive description have been carried out. Theoretical analysis of the concepts selected for implementation of the development methods of network detection systems has been carried out and the procedures of their hybridization have been substantiated. A software package for comparative analysis of the neuroimmune approach with machine learning methods has been developed and tested.
Development of theoretical foundations for the creation of intelligent technology based on a unified artificial immune system for complex objects control of the oil and gas industry
Authors: Samigulina G A , Samigulina Z I
Published: November 2021

The article is devoted to the current and promising direction of the implementation of the Industry 4.0 program based on the introduction of artificial intelligence (AI) approaches in the industrial production of the oil and gas industry. A review of the application of modern bioinspired AI approaches for solving problems of control and diagnostics of industrial equipment is carried out. The application of the approach of artificial immune systems (AIS) and various modified AIS algorithms is substantiated in the creation of innovative and competitive applications for solving various specific engineering problems and creating a modern highly efficient technology for automating production processes at oil refineries. The theoretical foundations for the creation of an intelligent innovative technology based on a unified artificial immune system (UAIS) for distributed systems for complex objects control using modern computer technology have been developed. Definitions of UAIS and immunological homeostasis are given. Unification is carried out with the aim of reducing the variety of modified AIS algorithms and their optimal use for solving the assigned tasks for the technological processes control. The classification and assessment of the effectiveness of the application of modified AIS algorithms is carried out. The block diagram of an intelligent control system based on the developed UAIS is presented.
Technical realization of the device for integrated monitoring of the parameters of the microwave path
Authors: Gimpilevich Yu , Afonin I , Vertegel V , Tyschuk Yu
Published: November 2021

Two designs of a microwave sensor have been developed for a device for built-in monitoring of microwave path parameters, built on the basis of a broadband quadrature measurement method. The first sensor design is made on the basis of a symmetrical strip line, the second - on the basis of a segment of a coaxial line. Each of the microwave sensor designs consists of three parts: a directional coupler and two non-directional measuring probes. The microwave sensor is designed to operate in the 1 - 2 GHz frequency range. The paper also proposes a variant of the circuitry implementation of the built-in microwave control device, which implements the procedure for broadband automatic measurement of the complex reflection coefficient and the power level in the microwave path based on the method of quadrature measurements. The device solves the problem of long-term automatic monitoring of parameters and timely detection of the beginning degradation of the antenna-feeder path.
A formal pattern of information system design
Authors: Unger A Y
Published: November 2021

A new design pattern intended for distributed cloud-based information systems is proposed. Pattern is based on the traditional client-server architecture. The server side is divided into three principal components: data storage, application server and cache server. Each component can be used to deploy parts of several independent information systems, thus realizing shared-resource approach. A strategy of separation of competencies between the client and the server is proposed. The strategy assumes that the client side is responsible for application logic and the server side is responsible for data storage consistency and data access control. Data protection is ensured by means of two particular approaches: at the entity level and at the transaction level. The application programming interface to access data is presented at the level of identified transaction descriptors.
DrumCorr program for selecting volcanic earthquake multiplets based on cross-correlation analysis
Authors: Zavedevkin I A , Shakirova A A , Firstov P P
Published: November 2021

The DrumCorr program based on cross-correlation detection has been developed to identify multiplets of the volcanic earthquakes. The program is implemented in Python 3 and reads ASCII and MiniSEED seismic data formats. The article presents the algorithm of the program, describing the cross-correlation detector and an example of subsequent processing of seismic data. The program was applied to volcanic earthquakes of the «drumbeats» seismic regime and allowed to identify earthquake multiplets characterized by various wave forms. The article presents the algorithm of the program, describing the cross-correlation detector, the features of the weak volcanic earthquakes selection by the STA/LTA method. And the primary analysis of the values of the correlation coefficients with the calculation of their standard errors depending on different signal-to-noise ratios.
Applications of big data and communications to sustainable development of smart cities
Authors: Gayer A V , Chernyshova Y S , Mamai I B
Published: November 2021

The formation of a smart city is a dynamic process that involves the implementation of systemic steps that transform the city into a comfortable environment for living. Smart cities are evolving on the basis of a flexible telecommunications architecture for IoT devices. Existing sustainability technologies require a large amount of computing power to process IoT data. For effective detection and localization of dysfunctions of complex socio-technical systems of smart cities, it is proposed to use an approach based on a parametric representation of objects of interest. In order to eliminate the influence of the variability of the Internet of Things on the classification accuracy, it is proposed to use a combination of optimality principles, taking into account the parameters of energy consumption, processor and memory usage.
Formalizing and securing relationships on multi-task metric learning for IoT-based smart cities
Authors: Savelyev B I , Solodov S V , Tropin D V
Published: November 2021

The use of modern information and communication technologies is an essential condition for the formation of the transport infrastructure of a smart city. Scientific and methodological approaches are developed to effectively monitor the transport infrastructure of a smart city based on multi-channel metric learning in the Internet of Things. The proposed solutions provide invariance to the type and nature of the movement of objects. The principles of technical implementation of the proposed method are substantiated using the characteristics of unmanned aerial vehicles of a smart city. Adaptive automatic switching of transport infrastructure monitoring channels is implemented in the form of a neural network analyzer software.
Synthesis method of orthogonal encoding and decoding matrices based on integers, providing the implementation of code division of channels
Authors: Vinar P O , Rabin S V , Rabin A V
Published: November 2021

The method of code division of binary channels based on the arithmetic analogue of convolutional codes is investigated. The synthesis method of encoding and decoding matrices is proposed for implementing a code division of channels regardless of the number of users. The synthesis and implementation of theses pairs of matrices will significantly simplify the schemes for constructing encoding and decoding devices. Research results can be used in various communication technologies: in real-time systems, in distributed systems in on-board equipment complexes, to ensure reliable information transfer.
Computational approach to synthesis of the multiversion structure of distributed information decision-making support system
Authors: Kovalev I V , Testoyedov N A , Voroshilova A A , Kovalev D I , Borovinskii D V
Published: November 2021

The computational approach to synthesis of the multiversion structure of distributed information decision-making support system is presented. A formal model of the local information system is given. This system is intended to ensure the functioning of a complex control system based on the multiversion approach and consisting of a set of multiversion objects. The problem of distribution of objects by local information subsystems has been solved. For a set of valid queries in a distributed system, the answers for the decision maker are formed sequentially without repeating queries. To take into account certain requirements regarding the structure of a distributed system, it is necessary to formulate these requirements in formalized constraints and introduce them into the mathematical description of the problem. Note that the effectiveness of the targeted use of the system depends both on the results of synthesis (structure and parameters of the system) and on the correct organization of the subsystem for monitoring its technical condition during operation.
Residual life management of cyber-physical transport systems
Authors: Susarev S V , Orlov S P , Ja Kravets O , Ponkratova A S
Published: November 2021

The article deals with the problem of assessing the residual life of robotic agricultural vehicles. This problem is inextricably linked to the organization of effective vehicle maintenance. The robotic vehicle has a multifunctional remote diagnostics system, which makes it possible to assess the probability of component failure in real-time. In virtual commissioning, simulation is the most appropriate tool for researching and finding effective maintenance solutions. A simulation model based on timed colored Petri nets is proposed. The structure of the model is given, and its modules are described. Research is carried out by the method of statistical tests on a simulation model. An example of evaluating the delays in executing a production task, depending on the maintenance procedures and the probabilities of robotic vehicle unit failures, is given.
Mechanisms of power distribution: principles of kinematic and force analysis
Authors: Chajkin A P , Yu Dobretsov R , Sokolova V A , Tikhonov E A , Kalimullin M N , Latypov R M , Nuretdinov D I
Published: November 2021

The article considers the features of performing kinematic and power analysis of a controlled power mechanism for the transmission of wheeled transport and transport-technological machines. Such mechanisms are currently used mainly on cars in order to improve handling, stability, traction and dynamic properties in severe road conditions. Such mechanisms are not produced in Russia, but theoretical studies are currently being conducted, the results of which will allow determining the main parameters of the mechanism and synthesizing its kinematic scheme. The proposed approaches are based on the methods used in the kinematic and force analysis of planetary gears, but it is taken into account that the mechanism of power distribution during operation has two degrees of freedom. It is indicated that there is a structural and functional similarity between the power distribution mechanism of the car and the turning mechanism of the tracked vehicle. A method is proposed for calculating the gear ratio of the power distribution mechanism according to the condition of matching the minimum possible turning radius provided by the steering trapezoid kinematics and the calculated turning radius.
Design of a system for fastening the pipelines’ elements to be brazed of an automated gas metering unit
Authors: Tynchenko V S , Kukartsev V A , Kuzmin N V , Lysyannikov A V , Katargin S N , Stashkevich A E
Published: November 2021

The article discusses an automated measuring installation, and also analyzes the subject area. Some types of soldering are considered (capillary, diffusion, contact-reaction and others). The choice of induction brazing for the soldering of pipeline elements of an automated gas metering installation has been substantiated. The work presents the installation of induction heating, considering the required technological parameters. Based on this installation, the basic diagram of the Fitting and the schematic diagram of the connecting sleeve were corrected, which will allow the development of a mobile induction installation as well as collapsible inductors. Potential induction equipment and the developed designs can be used to connect pipelines in the oil and gas industry.
Effect of vibrations on the residual stress field formation during milling of high-strength aluminum alloys
Authors: Yu Nikolaev A
Published: November 2021

The authors examine the influence of high-speed milling on the distribution of residual stresses in parts made of structural high-strength aluminum alloys Al-Cu-Mg, which are the main structural materials in the aerospace industry. Milling was carried out at high cutting speeds. Different tool settings were used to balance the instrument. Plastic deformation occurred in the part’s surface layers. Residual stresses were measured by the X-ray method. It was found that high-speed milling creates residual compressive stresses that are favorable for the operation of the part. The depth of the residual stresses depends on the cutting mode. The article shows the relationship between residual stresses and the type of metalworking tool, processing conditions in structural parts made of high-strength aluminum alloys.
Security management of the functioning of a multi-node mobile cyber-physical system with a distributed registry based on an automatic model
Authors: Kravets Ja , Almusawi O A R , Doroshenko Ju N , Mamedov S N , Redkin Yu V
Published: November 2021

The problems and features of security management of the functioning of a multi-node mobile cyber-physical system with a distributed registry based on an automatic model are considered. The algorithm of the functioning of the system node allows for the possibility of increasing or decreasing its resources using various approaches. Models of stochastic automata with a variable structure are used to model such systems. The process of functioning of a node of a system with a distributed registry based on a chain of blocks in the form of a finite automaton with a variable structure and linear tactics is formalized, which ensures that the sequence of changing the variants of the node’s behaviour strategy depends on the conditions of the environment with which it interacts by constructing state matrices.
Energy model of transport machines with braking energy recovery
Authors: Solovev A A , Malkin D E , Melkomukov M A , Yakushevich I I , Kuguk A K
Published: November 2021

Most of the time, modern transport vehicles operate in unsteady modes. Undoubtedly, the reasons for the decrease in the efficiency of machines are fluctuations in speed and load, their deviations from the optimal values cause an increase in energy losses. Another reason for the increase in energy losses is the process of forced braking when it is necessary to stop the car. A class of vehicles with hybrid propulsion systems that can recover braking energy are currently being developed. Significant advantages among them are transport vehicles with a flywheel energy storage, which have a long service life. This article discusses the energy model of transport vehicles with the possibility of braking energy recuperation.
Study of the features of the characteristics of a hybrid airship turn
Authors: Borodkin S F , Kiselev M A , Shkurin M V
Published: November 2021

the dynamics of aircraft motion is determined, as is well known, by the acting forces. When an airplane is flying, these forces include the total aerodynamic force, the thrust force of the propulsion system, and the force of gravity. Hybrid Airship differs from an aircraft by the presence, in addition to the above, of aerostatic force, the value of which depends, among other things, on the height of flight of the Hybrid Airship. The presence of aerostatic force affects the maneuverability of a Hybrid Airship. The proposed article analyzes the changes in the characteristics of a Hybrid Airship turn caused by the presence of aerostatic force.
Forecasting the life of a structure relative to the operating mode
Authors: Ogorelkov D A , Lukashuk O A
Published: November 2021

The question of forecasting the service life of transport machines designed by taking into consideration the load spectrum, that is close to the real one, is an important problem at the calculation. One of the ways to simulate real operating conditions at the design calculation is a method of randomization quasirandom loads. Methods of randomization are widely used in many areas of science and technique. In the article, the numeric comparison of different ways of randomization is shown at the calculation for determining the service time using two techniques: the use of a standardized function of randomization in the high-level programming language of the and the law of normal distribution at its different parameters. The use of the law of normal distribution makes the more exact fatigue calculation because it makes it possible to simulate the quasirandom process that corresponds to the real operation picture to a greater degree. The results presented in the work make it possible to fulfill the calculation of the service time of the metallic structure that is under cyclic asymmetric loads, at the well-known nature of the application of loading to it.
The general directions of development of longitudinally oscillating ultrasonic emitters for gaseous media
Authors: Khmelev V N , Shalunov A V , Bochenkov A S , Nesterov V A
Published: November 2021

The article is devoted to the development of a longitudinally oscillating emitter designed to influence gas-dispersed systems. The main methods and directions of modernization of radiators are proposed in order to increase the area of the radiating surfaces of the radiators, increase the uniformity of vibrations and reduce mechanical stresses.
Loss of radio waves energy on radio lines satellite-earth station
Authors: Samoylov A G , Samoylov V S , Nasir S A X
Published: November 2021

The main contribution of this paper is to study the influence of various natural factors on the conditions for the radio signals propagation on the satellite - Earth links. It is shown that the ionosphere practically does not interfere with satellite radio communications at frequencies above 5 GHz. The mathematical model is proposed for the numerical determination of the attenuation of the radio signal depending on the optical visibility during dust storms along the communication path.