bluuebunny/crossref_metadata_2025 huggingface dataset:
Basin stability and limit cycles in a conceptual model for climate tipping cascades
Authors: Wunderling Nico , Gelbrecht Maximilian , Winkelmann Ricarda , Kurths Jürgen , Donges Jonathan F
Published: November 2020

Tipping elements in the climate system are large-scale subregions of the Earth that might possess threshold behavior under global warming with large potential impacts on human societies. Here, we study a subset of five tipping elements and their interactions in a conceptual and easily extendable framework: the Greenland Ice Sheets (GIS) and West Antarctic Ice Sheets, the Atlantic meridional overturning circulation (AMOC), the El–Niño Southern Oscillation and the Amazon rainforest. In this nonlinear and multistable system, we perform a basin stability analysis to detect its stable states and their associated Earth system resilience. By combining these two methodologies with a large-scale Monte Carlo approach, we are able to propagate the many uncertainties associated with the critical temperature thresholds and the interaction strengths of the tipping elements. Using this approach, we perform a system-wide and comprehensive robustness analysis with more than 3.5 billion ensemble members. Further, we investigate dynamic regimes where some of the states lose stability and oscillations appear using a newly developed basin bifurcation analysis methodology. Our results reveal that the state of four or five tipped elements has the largest basin volume for large levels of global warming beyond 4 °C above pre-industrial climate conditions, representing a highly undesired state where a majority of the tipping elements reside in the transitioned regime. For lower levels of warming, states including disintegrated ice sheets on west Antarctica and Greenland have higher basin volume than other state configurations. Therefore in our model, we find that the large ice sheets are of particular importance for Earth system resilience. We also detect the emergence of limit cycles for 0.6% of all ensemble members at rare parameter combinations. Such limit cycle oscillations mainly occur between the GIS and AMOC (86%), due to their negative feedback coupling. These limit cycles point to possibly dangerous internal modes of variability in the climate system that could have played a role in paleoclimatic dynamics such as those unfolding during the Pleistocene ice age cycles.
Weyl geometry, topology of space-time and reality of electromagnetic potentials, and new perspective on particle physics
Authors: Tiwari S C
Published: November 2020

Consistency of Weyl natural gauge, Lorentz gauge and nonlinear gauge is studied in Weyl geometry. Field equations in generalized Weyl-Dirac theory show that spinless electron and photon are topological defects. Statistical metric and fluctuating metric in 3D space with time as a measure of spatial relations are discussed to propose a statistical interpretation of Maxwell field equations. It is argued that physical geometry is an approximation to mathematical geometry, and 4D relativistic spacetime is essentially 3D space with changing spatial relations. The present work is suggested to have radical new outlook on elementary particle physics.
Greenberger-Horne-Zeilinger-based quantum private comparison protocol with bit-flipping
Authors: Ji Zhaoxu , Fan Peiru , Zhang Huanguo , Wang Houzhen
Published: November 2020

By introducing a semi-honest third party (TP), this paper proposes a novel quantum private comparison (QPC) protocol using (n + 1)-qubit (n ≥ 2) Greenberger-Horne-Zeilinger (GHZ) states as information carriers. The parameter n not only determines the number of qubits contained in a GHZ state, but also determines the probability that TP can successfully steal the participants’ data and the qubit efficiency. In the proposed protocol, any other quantum technologies (e.g., entanglement swapping and unitary operation) except necessary technologies such as preparing quantum states and quantum measurements are employed, which can reduce the need for quantum devices. The proposed protocol uses the keys generated by quantum key distribution and bit-flipping for privacy protection, and decoy photons for eavesdropping checking, making both external and internal attacks invalid. Specifically, for external attacks, several well-known attack means (e.g., the intercept-resend attack and the measurement-resend attack) are taken as examples to show that the attackers outside the protocol can not steal the participants’ data successfully, in which the security proof of the protocol against the entanglement-measurement attack is provided. For internal attacks, it is shown that TP cannot steal the participants’ data and the participants cannot steal each other’s data. It is also shown that the existing attack means against QPC protocols are invalid for our protocol.
Thermal transmittance and thermo-magnetization of unsteady free convection viscous fluid through non-singular differentiations
Authors: Abro Kashif Ali , Memon Imran Qasim , Siyal Ambreen
Published: November 2020

Convective stability of ferromagnetic fluids can provide an adequate heat transfer via conventional convection due to a temperature gradient. This manuscript presents an analytical study for thermo-magnetized convection by means of non-integer order derivatives is investigated in which the core object is to show how to enhance, invert and suppress the convection modes based on local verses non-local kernels. Mathematical modeling is developed for the sake of magnetization depends upon governing equations of velocity, concentration and temperature profiles. Fractional treatments are invoked based on Fourier analysis and Laplace transforms to the dynamical equations govern the thermomagnetic convection. The analytical solutions of velocity, concentration and temperature have been established in terms of Mittage-Leffler

E

α

−
β

t

α

and elementary functions. In order to have the performance of higher or lower susceptibility from thermomagnetic convection, profiles of velocity, concentration and temperature have been depicted separately by means of Atangana-Baleanu and Caputo-Fabrizio fractional operators for highlighting the immense impacts on ferromagnetic fluid flow. For the sake of novel outcomes of this study, it is observed that velocity is decreasing function of magnetic field when an increment in the amount of magnetic constant kicks off the augmentation of the Lorentz strength.
Exergy analysis of dual-fuel combined cycle plants
Authors: Borush O V , Shchinnikov P A , Frantseva A A , Grigoryeva O K
Published: November 2020

An alternative to coal technology in regions with a significant share of gas in the fuel balance can be the transition to dual-fuel combined cycle gas turbine plants. The article considers five technological profiles of cogeneration combined cycle gas turbine power unit: with a low-pressure steam generator; with coal gasification; with gas line heater; with gas line heater and freon thermotransformer; dump type with a binary coefficient equal to one. A comprehensive analysis of cogeneration plants was carried out. The perfection of the thermal design of a combined cycle gas turbine power unit of each type is evaluated by the exergy structural coefficient. An analysis the criterion of technical and economic efficiency, exergy efficiency for the supply of electricity and thermal power for combined cycle power plants in comparison with traditional cogeneration power units in the power range of 50 … 250 MW are also given.
Investigations of the influence of tungsten carbide and tungsten oxide nanopowders on the radiation protection properties of cement matrix-based composite materials
Authors: Gavrish V , Cherkashina N , Chayka T
Published: November 2020

The influence of tungsten carbide and tungsten oxide nanopowders on radiation-protective properties of a composite material based on a cement matrix has been studied. These powders are obtained from carbide scrap production. In the radiation energy range of 0.06…1.408 MeV the gamma radiation attenuation coefficients at various concentrations of nanopowders WC and WO3 (3.6%, 6.4%, 9.6% of the material mass) have been considered. The mass attenuation coefficient and the multiple of attenuation of radiation of investigated materials are calculated. It is shown that nanomodified composite material has high radiation protection characteristics and can find wide application as a radio protection material.
Improvement of the frequency converter’s equivalent circuit when calculating non-sinusoidal modes
Authors: Belsky A A , Dobush V S , Zamyatin A I
Published: November 2020

The issues related to modeling a variable frequency drive are discussed in the article. The authors were faced with the task of determining the influence of the drive load on the parameters of its equivalent circuit. An unambiguous dependence of the drive load on the value of the current’s harmonic components is revealed. Namely, the smaller the load, the greater the value of the current’s higher harmonics. It has been established that disregarding drive loading can lead to a 19% error in modeling the frequency converter current consumption. It is shown that the results of the study can be extended to a wide range of drives in terms of power, since all calculations were performed in relative units.
The synergistic effect of the thickened digestate treatment in the vortex layer apparatus prior to its recirculation into the reactor on the characteristics of anaerobic bioconversion of organic waste
Authors: Kovalev Andrey A , Kovalev Dmitriy A , Litti Yuriy V , Katraeva Inna V
Published: November 2020

For the first time, the effect of thickened digestate treatment in a vortex layer apparatus (VLA) prior to its recirculation into anaerobic reactor on the efficiency of anaerobic bioconversion of an organic substrate was investigated. At the hydraulic retention time of the recirculated digestate in VLA for 30 seconds, of the substrate in the anaerobic bioreactor for 8 days and the recirculation coefficient of 1.5, the average specific yield of biogas increased by 75.2%, and the average volumetric methane production – by 16.8%. There was no increase in methane concentration in biogas, while the average concentration of hydrogen sulfide in biogas decreased by 8 times.
Impact effects due to hot vapour bubble collapse in subcooled liquid
Authors: Le T C , Melikhov V I , Melikhov O I , Yakush S E
Published: November 2020

Collapse of a hot vapour bubble captured by subcooled water can produce a cumulative jet similar to that appearing in cavitating flows. In the context of stratified steam explosions following spreading of hot melt under a water layer, impact of the water jets can be a reason for melt splashes promoting the mixing of cold and hot liquids necessary for energetic interaction. In this work, the characteristics of the directional water flow caused by collapse of a bubble near a wall are obtained, and a correlation is given which relates the ultimate height of melt rise to the bubble parameters and droplet size. Estimates relevant to melt splashes caused by the cumulative water jet impact are presented which agree with the experimental observations available in the literature.
Determination of the main parameters of the process of boric acid droplet entrainment from the WWER reactor in case of an accident
Authors: Morozov A V , Shlepkin A S , Sakhipgareev A R , Soshkina A S
Published: November 2020

The article presents the results of a calculation study of the process of mass transfer of boric acid from a WWER reactor in the event of an accident. An analysis of the literature data in this field of study was carried out. As a result, it was found that studies of the mass transfer of boric acid were performed with parameters not typical for the emergency operation of passive safety systems of nuclear power plants with WWER. The results of the calculation of the main parameters in the WWER reactor in the event of an accident with a rupture of the main circulation circuit are shown. The calculation analysis allowed us to determine that the maximum diameter of the droplets entrained by the steam is in the range 0.11-0.23 mm.
Mathematical modelling and improvement of ion exchange water treatment energy-saving technologies in power engineering
Authors: Chichirov A A , Chichirova N D , Filimonova A A , Babikov O E
Published: November 2020

A mathematical model of the ion-exchange filter regeneration process of a wastewater treatment plant is presented in this paper. In the model the ionite filter is considered as a chemical through-passage reactor with bulk material, final length, periodical action in a stationary mode. The one-parameter diffusion model used for the description with the Dankwerts boundary conditions makes it possible to calculate with sufficient accuracy the output concentration curves of the reagent and products.
Use of photovoltaic converters in electrochemical protection systems for underground pipelines
Authors: Artyukhov D I , Stepanov S F , Artyukhov I I , Miroedov F P
Published: November 2020

Currently, electrochemical protection of pipelines is provided by cathodic protection stations, which receive electric energy from power lines laid along the pipeline route. The construction and installation of facilities that ensure the transmission of electricity from centralized sources to locations of cathodic protection stations and the conversion of its parameters to the required level is characterized by significant capital costs. In recent years, there has been a leap forward in the development of alternative energy sources, which allows us to consider them as sources for power supply of cathodic protection stations. This paper describes the possibility of using photovoltaic converters to power cathodic protection stations. In addition, an implementation scheme was proposed and analyzed.
Development of methodological provisions for reducing the resource and energy intensity of cylindrical two-stage natural gas filters
Authors: Usachev A P , Shurayts A L , Biryukov A V , Salin D V
Published: November 2020

The article presents the development of methodological provisions for reducing the resource and energy intensity of cylindrical two-stage natural gas filters. In order to reduce consumption in filtering cylindrical elements and vertical barriers used for their dismantling, we proposed a layout plan for several short filtering cylindrical elements, located one on top of the other, instead of one existing analogue, i.e. a one-piece unit. At that, the height of the dismountable unit does not exceed the height of the standard structure. According to the proposed technique, we carried out calculations, the results of which show that minimum consumption in cylindrical two-stage filters is achieved when the number of filtering cylindrical elements located one on top of the other is doubled if compared with the existing analogue.
Simulation modelling of autonomous navigation support for small satellite constellation
Authors: Drozd O V , Tutatchikov V S , Kapulin D V
Published: November 2020

A small satellite system has many advantages related to its technical characteristics, production cycle and costs. At the same time, separate satellites are usually operating as a part of a ballistic-coupled constellation. The navigation and ballistic support tasks for the satellite group include calculation of satellite motion, of inter-satellite bases and prediction of the ballistic existence of the constellation. Currently, autonomous navigation support of the constellation is proved by onboard satellite navigation systems, the design cycle of which necessarily includes simulation of implemented algorithms. In the paper, the simulation model of small satellite navigation support is presented. The simulation procedure for the navigation support includes the following steps: formation the reference satellite constellation, estimation the current status of GPS and GLONASS systems orbital groupings, calculation the parameters of navigational satellite radio-visibility, solving the navigation problem according to global navigation satellite systems and inter-satellite navigation. The article also describes the procedure and results of modelling the process of the onboard navigation system functioning. Further development of the model associated with the software implementation of the small satellite disturbed orbital motion and modules for generating the radio frequency component of navigation and inter-satellite signals.
Development of a device for monitoring and tuning radio-technical parameters of a satellite communications Earth station
Authors: Gladyshev A B , Dmitriev D D , Tyapkin V N , Ratuschnyak V N
Published: November 2020

The article describes the existing methods for studying the characteristics of the antennas that are used in satellite earth stations. A variant of the device based on a spherical scanner is proposed. The spherical scanner uses the method of measuring the field in the near field. It has been established that for high efficiency and reduction of measurement time, it is necessary to use the spiral scanning method. The composition and block diagram of the device is presented. Recommendations on the use of software for processing measurement results are given.
Intellectual analysis of geological and technological data during the management of an oil field’s well-stock
Authors: Evsyutkin I V , Markov N G
Published: November 2020

The drilling and putting into operation of new wells on the operated well-stocks are labor-intensive and expensive business processes. Therefore the actual direction at the operation of such well-stocks is the development of new methods and the implementing them tools of effective well-stock management of already existing wells that allow lowering costs at the production of hydrocarbon material (HM). In this regard, today the optimum management decision-making is impossible any more without the use of perspective methods and algorithms of the intellectual analysis of geological and technological data. Results of the analysis of a current state in the field of intellectual methods and algorithms in relation to problems of well-stocks management at the production of HM on oil fields are given in the article. Results of the efficiency research of cluster analysis methods and the deep artificial neural networks (deep ANN or DANN) at the solution of one of the main tasks of well-stock management are received and analyzed; the task is a candidates-wells selection for carrying out geological and technical arrangements on the well-stock.
Methods of modeling and probabilistic analysis of large deviations of dynamic systems
Authors: Kabanov A A , Dubovik S A
Published: November 2020

The paper presents a new method of analyzing large deviations for nonlinear systems defined through matrices with state-dependent coefficients. Large deviations of the controlled process from some standard state is the basis to forecast any critical situation. The task of forecasting is limited to the optimal control problem of Lagrange-Pontryagin optimal control. Two effective methods – State-Dependent Riccati Equations (SDRE) and approximated sequence of Riccati equations (ASRE) – are used. The presented approach to the Lagrange-Pontryagin problem differs from the approach previously used for linear cases by the fact that it uses control in the form of a feedback instead of software open-loop control. This eliminates the need to calculate the end-time boundary value for a conjugate variable, which is the most time-consuming task in nonlinear cases.
Comparative analysis of libraries for computer vision OpenCV and AForge.NET for use in gesture recognition system
Authors: Kiselev I V
Published: November 2020

The article presents the results of the experiment, which based on a comparative analysis of two libraries for solving problems in the field of computer vision in intelligent gesture recognition system: OpenCV and AForge.NET. For the test was developed by intelligent gesture recognition system at both libraries and a block diagram of the gesture recognition system has been developed. A recognition algorithm based on neural network technologies has been developed, suitable sample descriptors and classifier structure have been selected to achieve the best results.The effectiveness of the gesture recognition test software was also evaluated. Below is a brief description of both libraries, a more detailed description of the research and test results.
Media content monetization model on the example of micropayments
Authors: Kukartsev A V , Lobkov K Yu , Tynchenko S V , Boyko A A , Stupina A A , Eremeev D V
Published: November 2020

The article provides a variant of the site content monetization model. It indicates the mechanism for the passage of micropayments. A presented simulation model is necessary for assessing the convergence of the unit economy where a user is a UNIT (web content consumer). A mechanism for selecting metrics that affect the margin value is applied. As a result of experiments with versions, various alternatives of the projected income were obtained without taking into account fixed costs (income from a paying user for different conversion values) and a variant of unit-economy convergence was found. The study made it clear that the constructed simulation model provides a visual opportunity to work with metrics, to obtain and compare the results of unit-economy calculations. Moreover, unit economics, as an analytic method, is becoming popular for presenting information to investors and effective for digital projects. It showed the prospects of this area at the project planning stage.
Mathematical modelling of transport of single and double charged ions through layered ion exchange membranes
Authors: Mareev AA , Kirichenko E V , Kirichenko K A
Published: November 2020

Monovalent selectivity of ion exchange membranes is important for such areas as hardness removal, stabilization of mining waters and fining of foods. The modern approach to the creation of monovalent selective ion exchange membranes is layer-by-layer adsorption of polyelectrolytes onto a membrane surface, which showed significant improvement in comparison with previously used approaches, most notably in comparison with the creation of a single thick layer of polyelectrolyte. Despite the practical importance, the mechanism of improvement in selectivity is unknown. Knowledge of the distribution of ions within the membrane and adjacent layers of solution would answer the question of the mechanism, but such information is unobtainable through the experiment. Hence we develop the 1D mathematical model based on Nernst-Planck-Poisson equations to describe the fluxes and the concentrations of single and double charged ions, as well as potential drop / current density through the ion exchange membrane. In this paper we formulate the problem and list experimentally determined parameters. Results of calculations will be compared with experimentally recorded I-V and V-t curves.
Network marks of montage in audio recordings
Authors: Portnyagin D G , Kravchuk E I , Trufanov A I , Ivanov A S , Berestneva O G , Tikhomirov A A
Published: November 2020

Very often forensic domain processes required an approval of authenticity in audio recordings presented as admissible evidence. Standard techniques to search for editing in audio materials are rather long and wearisome. The paper proposes a network platform as an effective instrument for solving the above mentioned problem. A specialized software tool was developed to transform given audio data into set of nodes and links according to the algorithms of natural visibility graph and horizontal visibility. A comparative analysis of the derived network structures was performed with the use of popular Gephi software product. The results demonstrate the first advances of network paradigm for detection of audio montage, in addition the examples of trivial signals of those point on possible existence of a marker - the metric that responds to sound recordings tampering.
Modeling a stressed-deformed state of a technological apparatus
Authors: Rubtsov A V , Kulakov P A , Mukhametzyanov Z R , Bayazitov M I , Arkhipova K S , Gimaltdinov I K
Published: November 2020

The operation of devices with a shirt is carried out at high pressures and temperatures in corrosive environments. This is a prerequisite for the development of such a damage mechanism as a decrease in wall thickness and loss of strength. For a quantitative assessment of the degree of corrosion wear and prediction of the further period of safe operation of the apparatus, standard methods and techniques are used, which are indicated in the current regulatory and technical documentation for diagnosing and evaluating the resource. For apparatuses with a shirt, access to a complete 100% inspection of the inner surface of both the main apparatus and the shirt is difficult due to the design features and the absence of a hatch of sufficient diameter. In this regard, a large error in the qualitative assessment of the technical condition and resource forecasting is possible. Currently relevant is the work on modeling apparatuses and assessing the stress-deformed state, taking into account their design and operational features, taking into account changes in the parameters of the technical condition, such as corrosion wear, and identifying the most loaded zones and areas with a view to their furthermore detailed diagnosis. In this paper, we study the interconnection between the effects of operational loads and corrosion wear, both of the apparatus itself and the shirt on the stress-deformed state of the apparatus as a whole.
Development of a mathematical model of a transformer-type corrosion meter for pipelines
Authors: Tyncherov K T , Bazhenov A V , Lipilina E Yu , Olenev A A , Selivanova M V
Published: November 2020

The article is devoted to the substantiation of a technical solution to the problem of monitoring corrosion changes in the walls of oil and gas pipelines using the electromagnetic method of non-destructive testing. To conduct a machine experiment on the qualitative and quantitative assessment of the characteristics of the magnetic field of solenoids with different geometric characteristics, a model has been developed that allows determining the magnetic induction and vector potential of the magnetic field of the solenoid and to visualize individual projections of vectors. The dependence of the vector magnetic potential of the field induced in the transformer and the role of the magnetic circuit in which the control object performs on the geometric and electromagnetic properties of the control object is determined.
Quality analysis of digital photogrammetric models obtained in low light conditions
Authors: Vystrchil M G , Sukhov A K , Novozhenin S U , Popov A V , Guba S A
Published: November 2020

The paper presents the results of the study of the photogrammetric models quality depending on the photogrammetric survey. The presented data have been obtained by the Xiaomi Mi Home Security Camera 360. We examined the texture of the captured object and the general geometric parameters of the created photographing basis as the experimental variable. As a result, the paper contains general recommendations for the cameras optimal location for photogrammetric surveying in low light and space limits. The main author’s idea of the improvement of the photogrammetric models quality is projecting a temporary artificial texture on the subject of surveying.
Simulation modelling in design of a city transit vehicle with electromagnetic suspension
Authors: Yaroslavtsev M V , Latyshev R N , Zemlyakov E A
Published: November 2020

Intensive development of city transit vehicles with electromagnetic suspension of the last decade raises the significance of their optimal design problems. In this paper, the simulation model of an electromagnetic suspension system of the city transit vehicle created in Simulink is presented. The model is featuring feedback applied to determine the magnitude of the magnetic flux. The main parameters of the electromagnet were evaluated while creating the model. The presented model was used to obtain the air gap regulator settings. An adaptive control system ensuring low energy consumption at low speed and high gap control accuracy at high speed could lead to the realization of the stable and efficient suspension system.
Reduction of defects in the process of formation of precision surfaces of titanium alloy products
Authors: Maksarov V V , Makhov V E
Published: November 2020

The article proposes a new method of reducing defects in the process of formation of precision surfaces of titanium alloy products, which are significantly influenced by self-oscillation in the process of processing. The technique of controlling the amplitude of self-oscillations in the optical image of blanks with a digital camera of the light field and vibration parameters from the Doppler radar is presented. Studies have shown that the vibration signal from the surface of the product obtained by Doppler locator gives more complete information about the defects of the treated surface, information related to the process of formation of precision surfaces and the causes of self-oscillations. Optical method of control of self-oscillations on the basis of registration of a light field expands a range and accuracy of control of self-oscillations in 10 times. The configuration of the measuring scheme with parametric illuminator allows reducing defects in the process of formation of precision surfaces of products from titanium alloys. Studies have shown the possibilities of using vibration control to control the technological process to reduce defects in the process of forming the precision surfaces of titanium alloy products.
Efficiency of implementation of interval traffic regulation by the "virtual coupling” system on the section of the railway line in the framework of the "digital railway” project
Authors: Olentsevich V A , Konyukhov V Yu , Olentsevich A A , Lysenko D A
Published: November 2020

In order to remain competitive in the world market, to maximize the needs for transportation with increasing volumes of work, to ensure the availability and quality of services provided on railway transport in the field of organizing the transportation process, it is necessary to use modern digital approaches. The article provides an assessment of the existing technology for organizing the driving of connected trains using the example of the operation of the Mariinsk - Krasnoyarsk-Vostochny section of the Krasnoyarsk railway. With the development of technology for driving connected trains, it has become possible to connect trains by means of a virtual coupling, which does not imply physical coupling of trains using an automatic coupling device, while the trains are in a constant, equidistant, position from each other. To analyze the efficiency of organizing the driving of double trains in the "Virtual Coupling" mode, the authors of the article built train schedules with an interval for double trains of four minutes, and in the future with an interval of two minutes. The calculation of the main indicators of the train schedule and the line capacity has been made. The calculation revealed that with the introduction of the technology of interval regulation according to the "Virtual Coupling" system, the required throughput of the railway line increases by 19.05% relative to the existing traffic schedule with the use of double trains. The use of trains with "Virtual Coupling" on the Mariinsk - Krasnoyarsk-Vostochny section is preferable, since their use reduces losses in the traction network, power consumption and other parameters of the traction network, and the voltage at the locomotive current collectors is significantly higher than when using connected trains. The economic effect from the use of this technology for organizing the work of the Mariinsk-Krasnoyarsk Vostochny section will amount to 894.14 thousand rubles per year.
Industrial cyber-machines remote control method
Authors: Shukalov A V , Zharinov I O , Zharinov O O
Published: November 2020

The cyber-environment configuration is being transformed significantly today. The new approach advantage is to use cyber-machines (CM) united into the industrial net segments for multi-disciplinary product production. A set of CM is several times more efficient than a classical horizontal machine pool. The CM target orientation, which function in the self-regulating mode is provided with the master-system by remote control channels. There is a scheme proposed how to control the CM remotely to support the wide spreading technologies of address high level and low-level data exchange. The wide-spreading technology controls the CM group simultaneously. The address technology uses one time access to each CM. The high-level technology programs CM functional capabilities. The low-level technology controls the CM physical elements. The master-system allows for the provision production chains adaptive control and has some intellectual potential of the industrial development. An effective CM inter-operation interaction surely justifies the investment attractiveness of the material production sphere.
Automatic control system of damping winch to compensate influence of heave of parent vessel and to stabilize immersion depth of towed underwater vehicle
Authors: Chupina K V , Kachanov D A
Published: November 2020

The paper is devoted to a problem of synthesis of the automatic control system of a damping winch. The vessel descent-rise devices are used for vessel heave compensation and immerging depth stabilization of a towed underwater vehicle. Most of them have essential disadvantages. First, a cable destructs during its bending strains on descent-rise device’s blocks. Second, a power of such device increases due to the compensation function. To eliminate these disadvantages it is offered to use a special damping winch. It is on the underwater vehicle. There are two controllers in the suggested automatic control system. The rope’s tension controller is used for a heave compensation function of the damping winch and the rope’s length controller is used for immerging depth stabilization of a towed underwater vehicle. For optimization of controllers the standard coefficients method with binomial decomposition and an optimal module method were used. Due to the offered approach vertical displacements of the underwater vehicle are reduced ten times at any sea state codes and stepless depth changing for a towed underwater vehicle is provided.
The methodology of training an underwater robot control system for operator actions
Authors: Kramar VA , Alchakov V V
Published: November 2020

The article discusses the approach to building an underwater robot control system based on the “Programming by Demonstration” approach. The basic elements of the implementation of the approach are considered. The participants in the learning process are indicated. Input variables are defined, and a training model is selected. As a result, a training methodology for the underwater robot control system is formulated for the system to perform specified manipulations.
Asynchronous motor drive operability field with two-link structure of frequency converter
Authors: Zhukovskiy Y L , Korolev N. , Filatova I.
Published: November 2020

The article presents an approach to determining the electric drive’s operability based on an asynchronous motor with a short-circuited rotor and a two-link frequency converter. Mathematical description of the frequency-controlled electric drive is performed, in particular, selection of criteria taking into account an electric and mechanical part. The harmonic current distortion coefficient as a component of the power coefficient is used for the determination of the energy criterion. The mechanical criterion is the coefficient of the electromagnetic moment pulsation, on the value of which the conjugated equipment depends. The operability field is represented as a function of three variables: (a) rotor speed, (b) current harmonic distortion coefficient, and (c) electromagnetic moment pulsation coefficient. The obtained surface makes it possible to determine the actual state of the electric drive and to estimate the reserve of operability, which allows reducing the operating costs in terms of repair and maintenance.
Investigation of the characteristics of an electric arc plasma torch with an output step electrode
Authors: Anshakov A S , Aliferov A I , Domarov P V
Published: November 2020

The generalized formulas are obtained in the criteria form for calculating the energy parameters and the discharge chamber of the plasmatron. The calculation results and experimental data for the thermal efficiency and current-voltage characteristics of an electric arc plasma torch with an output step electrode are presented.
Comparative analysis of sensors for climate check
Authors: Astakhov N V , Bashkirov A V , Glotov V V , Kostyukov A S , Tsipina N V , Glotova T S
Published: November 2020

Registration and monitoring of climatic conditions is an essential task in many manufacturing processes. These parameters are essential for storing certain types of materials or equipment and also play a significant role in the operation of the device. In this regard, the problem of using specialized recording devices becomes relevant. This paper considers such instruments for recording and monitoring climatic characteristics as testo 608-H1; testo 635; testo 645; TPM 201. Their technical characteristics and measurement ranges have been presented. Also the conclusions about the conditions under which it is better to use a particular device have been drawn. The study found that testo 608-H1 and testo 635 have limited functionality and are mainly used in accommodation units or small warehouses. The testo 645 and TPM 201 devices have more extensive functionality and are used in enterprises in test facilities, production lines, climate chambers, dryers, foundry furnaces, galvanic shops.
Criteria for similarity of the processes taking place in vacuum plasma torches with hollow cathodes
Authors: Cherednichenko A V , Cherednichenko VS , Domarov P V
Published: November 2020

The article demonstrates that using the vacuum because of its properties as a medium of zero conductivity has enabled to create the construction of hollow cathode plasma torch. An analysis of thermophysical processes inside the cathode channel was carried out. Conditions were determined for the generation of high enthalpy plasma in the cathode channel and the gas-dynamic output of the plasma into the discharge column in the axial direction. A model of the development of the processes of energy input into the cathode channel is considered. General patterns of the working modes are demonstrated, and criteria of similarity for hollow cathode discharges are formulated based on the Knudsen number, the Reynolds criterion and the interconnected electromagnetic parameters.
Mathematical modelling of physical processes in a synchronous generator with permanent magnets for output voltage stabilization circuits
Authors: Kaluzhsky D L , Biryukov V V , Mekhtiyev A D
Published: November 2020

When some consumers are powered from independent sources of electric energy, there is needed stabilization of output voltage on the generator in a wide range of load current changes. The use of traditional stabilization methods in the power supply systems with electric machines does not always provide the required level of the supply voltage. The use of synchronous magnetoelectric generators in voltage stabilization circuits is of particular interest in this regard. For determining the possibility of their use, the operating conditions of electric machines were analyzed, the main factors affecting their external characteristics when varying the load level were identified. The studies were based on the mathematical model that ultimately made it possible to obtain dependences convenient for use in engineer.
Modeling an energy storage device for electric vehicles
Authors: Malozyomov B V , Stepanenko O G , Daudov I M
Published: November 2020

The article discusses the most promising areas for improving energy efficiency in urban electric transport. The object of research is the rolling stock of urban passenger road transport. The subject of the study is to establish the dependence of the energy-efficiency of selecting the type of energy storage, energy consumption and power storage devices, a location of energy storage.
Digital platform as a means of process optimization of integrating electric vehicles into electric power networks
Authors: Zhukovskiy Y L , Suslikov P K , Arapova E G , Alieva L Z
Published: November 2020

In this paper, we consider the need to create an algorithmized digital platform for the development of electric charging networks of road transport and to optimize the load on the current power grid complex. In modern conditions, this platform can become an example of a mechanism for public-private partnerships and the development of environmentally friendly transport. The purpose of the platform is to provide users with up-to-date information about the state of the electric vehicle battery, reduce the cost of creating a network charging infrastructure for electric vehicle transport, automated resource accounting for power supply companies, and other services. The use of information technologies to combine the processes of economic relations in the field of energy sales services will attract funds for infrastructure development by increasing the load factor of generating capacities and unloading power centers. In the article, the authors propose a digital platform architecture using modern technologies such as IIoT, Vehicle to Grid (V2G), Machine learning, Big Data.
NBIC-technology and strategic management tools in the organization of business and production
Authors: Akberov K Ch , Sukhodaeva T S , Malozyomov B V , Shuraev I A
Published: November 2020

The paper is devoted to the analysis of the development of industrial production organizations, using focal points for the development and implementation of a production management strategy. It also solves the problems associated with the development of mathematical and algorithmic support for adaptive decision support systems in situational centres, taking into account expert options for institutional conditions in information systems for operational monitoring, situation analysis and assessment of production situations.
Forming a taxi service order price using neural networks with multi-parameter training
Authors: Andriyanov N A
Published: November 2020

The article discusses the use of neural networks to forecast the prices of orders in the taxi service. The analysis shows that the results of the price control action are preferable to the results that are obtained for the direct cost of the trip. Special attention is paid to such factors as the time of the order, the weather condition of the environment, the number of cars in the area, as well as the distance between the starting and ending points of the route. It was shown that networks ensure maximum accuracy with backward propagation of error with the number of neurons (5) close to the number of parameters (4).
Storage and analysis of natural resources information in various territories
Authors: Mikhalev A S , Tynchenko V S , Kukartsev V V , Korpacheva L N , Kukartsev V A , Rozhkova A V
Published: November 2020

The article is devoted to the creation of a system of cartographic models of natural resources for a specific territory. The reasons for the inefficient use of natural resource information in modern Russia are described. The place of natural resource mapping in the formation of a natural resource information space is characterized. The task of systematic consideration of natural resources when creating cartographic support for solving the problems of natural resource management and environmental management planning has been set. It is proposed to develop a program for processing images in the GeoTIFF format, intended for the analysis of natural resources. The structure of the program for the planning and management of environmental management is presented. The main functional types of CMRD are outlined: inventory, estimated, forecasted, recommended. The features of their use at various stages of environmental management are identified.
Software and algorithmic decision support tools for real estate selection and quality assessment
Authors: Zelenskiy I S , Parygin D S , Ather D , Soplyakov I N , Antyufeev A Yu , Prigarin E A
Published: November 2020

This paper describes the development of an algorithm for comprehensive assessment the quality level of real estate objects based on multicriteria estimation. Existing approaches to assessment and two main groups of parameters are noted. The module of pre-processing and structuring of records about real estate objects based on text processing is presented. In addition the task to indicate suspicious real estate ads is considered and an algorithm of the solution based on image processing is presented. Conclusions are made about the problems and prospects of applying the proposed approach to the assessment the quality of real estate objects.
Computer-aided design systems for product life cycle stages
Authors: Gilmanova A M
Published: November 2020

The article gives a brief analysis of computer-aided design (CAD) systems and KBE-project, the use of CAD in the design of products at all stages of the life cycle. The result of CAD studies can be used by enterprises when choosing CAD categories of low, medium or higher level.
The effect of sucrose concentrations and shoot inoculum density on the growth of in vitro shoot of teak (Tectona grandis L.)
Authors: Witjaksono  , Riastiwi I , Nugraheni K U , Windarsih G
Published: November 2020

The teak belongs to the highly prized timber tree. Quality teak trees have been guaranteed by planting clonal planting materials propagated vegetatively, for example, by shoot tip cutting and tissue culture. Tissue culture propagation of teak has been commercially viable even though the efficiency of production can still be improved. This research aimed to study the effect of increasing shoot inoculum density and sucrose concentration requirement for optimum growth of teak shoot in vitro. Inocula of a single nodal shoot in the number of 5 or 9 were inoculated on modified MS basal media with sucrose concentrations treatment of 20, 30, 40, 50, and 60 g l−1. The results showed that the standard sucrose concentration of 30 g l−1 and a higher concentration of 40 g l−1were optimum for the growth the inocula of the densities tested. Even though the average shoot growth was lower for nine inocula than that of five inocula, the total shoot growth was higher for the former. An increasing number of inocula can be used as a method to increase the efficiency of shoot proliferation stage of teak micropropagation.
Evaluation of the potency of endophytic fungi associated with Artemisia annua as antibacterial and antioxidant
Authors: Evana  , Praptiwi  , Fathoni A , Ilyas M , Maehara S , Gusta A
Published: November 2020

Artemisia annua has been known as a traditional herbal medicine. The purpose of this study was to evaluate the potential of eight endophytic fungi associated with A. annua as antibacterial and antioxidant. Preliminary screening for antibacterial and antioxidant activities was carried out by the TLC-bioautographic method, and the active extracts were further analyzed for their MIC and IC50 values by serial microdilution method at 96 microwell plates. The results showed that eight endophytic fungi were able to inhibit the growth of Staphylococcus aureus with MIC values ranging from 64 to > 256 μg/ml. In the meantime, five endophytic fungi inhibited the growth of Eschericia coli with MIC values of 256 μg/ml. One isolate, which has a very strong antibacterial activity against S. aureus (MIC = 64 μg/ml), was TdAaCb-2. Four endophytic fungi extracts were active as an antioxidant by acting as DPPH free radical scavengers. The results of this study indicated that the endophytic fungi extracts associated with A. annua were promising natural sources for antibacterial and antioxidant.