bluuebunny/crossref_metadata_2025_split huggingface dataset:
Kenyan tea is made with heat and water: how will climate change influence its yield?
Authors: Rigden A J , Ongoma V , Huybers P 
Published: January 2020

Abstract
Tea is the most consumed beverage in the world apart from water. Climate change is anticipated to affect the tea industry, but quantified large-scale predictions of how temperature and water availability drive tea production is lacking in many regions. Here, we use satellite-derived observations to characterize the response of tea yield to water and heat stress from 2008 to 2016 across Kenya, the third largest producer of tea. We find that solar-induced fluorescence captures the interannual variability in tea yield remarkably well (Pearson’s correlation coefficient, r = 0.93), and that these variations are largely driven by the daily dynamics of soil moisture and temperature. Considering rising temperature in isolation suggests that yields in 2040–2070 would decrease by 10% relative to 1990–2020 (ranging between −15% to −4% across 23 models), but most climate models also simulate an increase in soil moisture over this interval that would offset loss, such that yields decrease by only 5% (ranging between −12% to +1%). Our results suggest that adaptation strategies to better conserve soil moisture would help avert damage, but such changes require advanced planning due to the longevity of a tea plant, underscoring the importance of better predicting soil moisture over the coming decades.
Forming and developing a green transport corridor in the Arctic
Authors: Teslya A , Gutman S 
Published: January 2020

Abstract
The paper discusses problems related to transport infrastructure in the Russian Arctic, including one of the most important international transport corridors, the Northern Sea Route. We have established that Arctic ports are one of the weakest components of the transport corridor of the Northern Sea Route. We have carried out comparative analysis of the main ports and their infrastructure, considering the possibilities for developing the Northern Sea Route as part of the infrastructure of a green transport corridor. We have constructed a strategic map for the green transport corridor (i.e., a sustainable transport system including five components: sustainability, stakeholders, industry and entrepreneurship, qualifications and personnel, financial resources and budget). Causal relationships between the components have been found and key performance indicators for the sustainability component have been formulated.
Transport and logistics hub for unmanned aircraft
Authors: Levshonkov N V , Golovina E S 
Published: January 2020

Abstract
The problems of a transport and logistics hub and its technical equipment for cargo receiving and sending by remoted-piloted vehicle unmanned aircraft are explored. The advantages of remoted-piloted vehicles using for multimodal transportation are shown. The general information of the necessary equipment for landing fields and cargo terminals are provided. The principles of an intelligent dispatch system with a dedicated module as part of the transport and logistics hub are outlined. Recommendations of the introduction of multimodal transportation in commercial exploitation are presented.
To a question on the possibility of using mechanoluminescent sensor elements with area-distributed sensitivity in aerospace engineering
Authors: Tatmyshevskiy K V , Pavlov D D 
Published: January 2020

Abstract
This article considers the question of the possibility of using distributed mechanoluminescent sensor elements to create materials with a self-diagnostics function for use in aerospace engineering. In particular, it is proposed to use these sensor elements to monitor the condition of the shell and detect impacts and collisions. A brief description of the phenomenon of mechanoluminescence is given and the design of a sensor imitating a sheathing element is described in this article. The main attention is paid to an experimental study of simulating the collision of a solid with a composite material, which has a mechanoluminescent sensor element distributed over the area. The results of data processing are presented and made the conclusion about the possibility of using this type of structures for structural health monitoring in aerospace technique.
Research of dynamic characteristics of the hybrid electrohydraulic aircraft actuator with combined speed control
Authors: Alekseenkov A S , Erofeev E V 
Published: January 2020

Abstract
The paper presents the results of mathematical modeling and experimental research of the dynamic characteristics of the prototype of aircraft hybrid electrohydraulic steering actuator with combined speed control. The mathematical modeling of dual-mode electrohydraulic actuator was performed in the MatLab Simulink and the experimental research was carried out at the control systems test-rig in Central Aerohydrodynamic Institute. The main goal of the experimental research was to determine the output characteristics of actuator, among them static (speed and mechanical) and dynamic (bode-diagrams, transients responses and dynamic stiffness) in the backup (autonomous) and main modes of its operation, including when the actuator was under load.
Support for decision-making to combat natural fires in Taiga-Analyst system
Authors: Dorrer G A , Kobijzhakova S V , Yarovoy S V 
Published: January 2020

Abstract
The system of regulatory documents defining the processes of decision-making on combating natural fires in the Russian Federation is described and the necessity of creating an information system to support decision-making in this field is justified. The processes of detection and response to natural fires are presented in the form of agency models. The structure of the system of support of decision-making on the use of resources and means for fire elimination, based on the software product “Taiga - Analyst,” is proposed. The system is implemented on the basis of agency simulation modelling and allows to select forces and means for fire control, model its propagation and elimination with reference to the terrain map using a geographic information system. The scheme of decision-making in the fight against natural fires using the proposed system is shown. Participants of fire fighting as agents from the moment of fire detection to the moment of use of forces and means are considered in detail. A comparative analysis is presented with an indication of the technical characteristics of aircraft involved in the fight against natural fires.
Rhenium behavior in the KF-KBF4-B2O3-KReO4 melt
Authors: Arkhipov S P , Apisarov A P , Isakov A V , Chernyshov A A , Tuzyuk A A , Zaikov Y P 
Published: January 2020

Abstract
The present paper is devoted to the study of the electrolyte temperature influence on the cathode process of rhenium reduction on the glassy carbon anode by the cyclic voltammetry method. Experimental dependencies, which characterize the influence of the KReO4 addition on the KF-KBF4-B2O3 system liquidus temperature, were built according to the obtained data on the thermal analysis. It was found that rhenium reduction at lower electrolyte temperatures requires higher values of cathode overpotential.
Combined efficiency margin in the implementation of the DEA method
Authors: Kovalev I V , Kuznetsov A S , Zenutkin N V , Morozov E A , Zeitler A V 
Published: January 2020

Abstract
DEA (Data Envelopment Analysis) method and its modification are considered in the paper. An inefficient frontier is suggested to be introduced. The intersection of the efficient frontier and inefficient frontier is researched. The intersection of both frontiers helps to construct a hyper plane to separate a sample into two classes.
Analytical approach to the diversification effect evaluation of the innovative engineering projects portfolio for a machine-building enterprise
Authors: Golovenkin E N , Vilkov V Yu , Matronitsky D A , Bliznevsky A S , Voroshilova A A , Tuev E V 
Published: January 2020

Abstract
As a tool to reduce the risks of innovation at the machine-building enterprises the authors suggest a new methodology aimed at point-based assessment of innovation risks. However, the experts are more likely to give interval estimates when assessing the risks of innovation. To work with interval estimates, a new software system was developed. The authors suggest using a market model that assumes a division of risks into systematic and non-systematic and allows to take into account the effect of diversification of the innovative portfolio of the machine-building enterprise. The steps of the methodology and its approbation on the data on innovative projects of one of Russian Federal Space Agency (Roskosmos) enterprises are presented in the paper.
GERT-network optimization model for technologies of hazardous industry management
Authors: Baranov V V , Bliznevsky A S , Kaftasyev D A , Tynchenko Ya A , Kuznetsov A S 
Published: January 2020

Abstract
The paper introduces GERT-network optimization model for the technologies of hazardous manufacturing process management supported by the software of distributed production control systems. The development and implementation of the formal means for optimizing processes for the formation of managing hazardous industries using GERT-networks technology is presented. It allows to include into the model random deviations and uncertainty arising directly during the execution of each separate task of hazardous industries management technology.
Longitudial fluctuations of rotors of disk knife refiners
Authors: Vikharev S 
Published: January 2020

Abstract
The subject of the study is the longitudinal fluctuations of the rotors of disk knife refiners. The dynamic and mathematical models of rotors of disk mills are developed. As a result of the research, a methodology for calculating the longitudinal fluctuations of rotors is proposed and tested. The error in determining the lower frequencies of free fluctuations of the mill rotors does not exceed 9%. The lowest frequencies of free longitudinal fluctuations of the rotors of existing mills are in the range of 85-165 Hz, and the second and subsequent frequencies of free fluctuations are in the frequency range above 1 kHz. When designing and operating disk knife refiners, it is necessary that the minimum inter-knife gap between the rotor and stator does not exceed the amplitude of fluctuations of the mill disk. The developed calculation procedure can be used in other industries, for example, mining and metallurgy.
Assessment of technological development and economic sustainability of domestic industry in modern conditions
Authors: Sadriddinov M I , Mezina T V , Morkovkin D E , Romanova Ju A , Gibadullin A A 
Published: January 2020

AbstractThe study is devoted to assessing the technical and technological sustainability of industrial production in the Russian Federation. The study proved that the basis of the Russian economy is industrial production, the results of which form the country’s gross domestic product, maintains socio-economic stability and provides the population with various consumer goods. At the same time, the analyzed indicators of output, depreciation and renewal of fixed assets and the level of innovative development of production capacities indicate a drop in the technical and technological stability of industrial production. The work proposed a structural-logical scheme for ensuring technological development and economic sustainability of industrial production, containing requirements for the development of indicators for determining sustainability and mechanisms for its achievement in the context of the implementation of different scenarios for the development of industrial production. In conclusion, the study presents the main findings and results of the work.
Torsion of anisotropic and inhomogeneous prismatic rods with a rectangular cross section
Authors: Derevyannykh E A , Maksimov A N , Mitrofanova T V , Smirnova T N , Kopysheva T N 
Published: January 2020

Abstract
The limiting state of prismatic rods made of anisotropic material under torsion under the condition of translational plasticity is investigated. The rod of heterogeneous material is represented by a composite rod, when different plasticity conditions are true in different parts of the rod. Basic relations are determined by the method of characteristics. A field of characteristics of the basic relations for anisotropic and composite rods is constructed under the condition of translational plasticity, relations are obtained by characteristics, a tension break lines are found.
Simulation of the process of conduction of thermal energy transfer through the multilayer wall of the apparatus
Authors: Tuishchev A I , Tretyakova T P , Ozerova T S , Kulakova Yu P 
Published: January 2020

Abstract
We consider a multilayer wall of the apparatus, consisting of dissimilar materials, having heat loading during heat transfer in the form of conduction (thermal conductivity). Using the basic law of thermal conductivity, mathematical expressions are derived that makes it possible to calculate the basic indicators of thermal conductivity for various multilayer walls consisting of different materials. As a demonstration of the application of the above approach, an example of calculating the equivalent coefficient of thermal conductivity and specific heat flux of a printed circuit board is given.
Prediction of cutting force during hard turning of 105WCr6 steel using artificial neural network and neuro-fuzzy modeling
Authors: Rastorguev D A , Sevastyanov A A 
Published: January 2020

Abstract
In this work research of correlation between mean value and range of cutting force and processing modes during hard turning of 105WCr6 steel is presented. The results of three-factor experiment on end face cutting of ring workpieces hardened to 55 HRC are presented. During experiment cutting speed, feed and cutting depth are varied. The value of the cutting force is estimated indirectly by the value of current load of the main drive motor. For the development of the model which can predict the value of cutting force at given cutting modes feed-forward neural network trained using Bayesian regularization algorithm and adaptive neuro-fuzzy inference system are used. Developed mathematical models can predict cutting force parameters with high accuracy.
Modeling and simulation of chemical processes using the hybrid methodology
Authors: Shornikov Yury V , Popov Evgeny A 
Published: January 2020

Abstract
Chemical processes are identified as hybrid dynamical or event-continuous systems. Features of modeling and simulation of systems of this kind are discussed. A modeling and simulation environment named ISMA is briefly described. A continuous ideally stirred-tank reactor is modeled and simulated in ISMA. The simulation results are given.
Intelligent decision - making support on the level of encryption of information transmitted in the UMV information exchange channels
Authors: Moiseev D V , Bryukhovetskiy A A , Skatkov A V 
Published: January 2020

Abstract
The paper considers the solution of the interdisciplinary fundamental scientific problem of ensuring the reliability and high throughput of information exchange channels (IEX) between unmanned vehicles (UMV) located in different environments and dispatch centers (DC) of the “smart city”. The solution of the management problem of providing a reliable and high-bandwidth IEX between UMV and DC in different environments requires the development of an intelligent decision support system to select the level of encryption of information transmitted over open communication channels, under conditions of uncertainty.
Method development for analysis of information components of the monitoring system with a limited delay
Authors: Kravets O J , Panfilov I A 
Published: January 2020

Abstract
Methods of modeling and analysis of information components of a monitoring system are examined. They are based upon methods of the queueing theory. In particular, a limited waiting for service requests in a multi-linear system with a general queue is considered. Various types of failures have also been taken into consideration. Particular emphasis is made on deriving the analytic dependence of loss probabilities from factors that limit a waiting queue (i.e. number of positions available within a queue and maximum stay time in the given queue) in case of a simple stream of calls which are incoming for service, and the demonstrative law of channel occupancy distribution.
Modeling of algebraic analysis of PRESENT cipher by SAT solvers
Authors: Maro Ekaterina 
Published: January 2020

Abstract
Paper presents approaches to algebraic analysis of the reliability of symmetric block ciphers by solving Boolean satisfiability (SAT) problem. A description of the application of decision search algorithms by the DPLL method is given. The principle of formation of the SAT problem for algebraic analysis of PRESENT cipher is proposed, as well as the parameters of the obtained SAT problems for a different number of cipher rounds and plaintexts.
Nature-inspired algorithms for a scheduling problem in operational planning
Authors: Semenkina O E , Popov E A 
Published: January 2020

AbstractThe scheduling problem is a widespread one, and it is still not automatized mostly because of the so-called combinatorial explosion. The paper describes two different approaches to solving a hierarchical scheduling problem based on solution representation. The first one proposes to find an optimal order of projects and then to solve the resource-constrained project scheduling problem for each of them. The second one assumes that we can find a priority of all activities for all projects and use it in the schedule building process if there is a conflict in the choosing of the next activity. The paper considers some nature-inspired algorithms such as the intelligent water drops algorithm, a genetic algorithm and ant colony optimization as well as a self-configuring version of the last two. The algorithm performance and different solution representation approaches are compared using the results of solving the test problems.
Analysis of noise immunity of GLONASS and GPS positioning receivers
Authors: Dubrovin A G , Baranov Yu N , Katunin A A , Markin N I 
Published: January 2020

Abstract
The article describes the method of comparative analysis of noise immunity of GLONASS and GPS satellite positioning receivers based on a broadband noise oscillator which allows us to compare multivendor positioning receivers on a real-time basis. Besides, the suggested method enables to assess the capacity of a robust positioning signal produced by GLONASS and GPS systems to resist the noise. The method is charecterized by the clarity of obtained results and allows to choose products of the best quality among the commercially available models of positioning receivers.
Modeling and visualization of the Industry 4.0 cyber and physical productions
Authors: Zakoldaev D A , Shukalov A V , Zharinov I O , Zharinov O O 
Published: January 2020

Abstract
An actual task is to design the modeling and visualizing components of the Industry 4.0 production division activity. The Industry 4.0 production division as a part of smart factory functions automatically with special cyber and physical systems (CPS). The smart factory projection is done as a program of the industrial economy sector prioritized development. To project a production division they use the systems of automatic projection (CAD) installed in an instrument designer PC. Smart factory CAD components are CPS graphical models means, which includes the production division graphical models and the models of product being manufactured. All graphical models have the full information similarity to the physical devices. There are components and description schemes of their interaction to create CAD software to project automatic productions.
Hardware reservation of cyber-physical production of the Industry 4.0
Authors: Zakoldaev D A , Shukalov A V , Zharinov I O , Zharinov O O 
Published: January 2020

Abstract
An actual task has been studied to increase the Industry 4.0 production companies functioning safety with methods of cyber and physical systems machine reserving. The production machine reserving shall include some additional components to the technological equipment, which in their functions and properties duplicate the existing low-reliable components. With the method of cyber and physical systems reserving in production they can realize different schemes of assembly units transportation within the smart factory technological lines. Cyber and physical systems reserving schemes could be described as equivalent schemes (chains) to calculate the parameters and evaluate company duplicating efficiency are done according to the methods of the reliability theory. There is a scheme of typical technological line of cyber and physical production. There is a way of low-reliably cyber and physical systems reserving. There is a way of machine reserving of cyber and physical production with a pool of reserved cyber and physical systems. There is a scheme of the Industry 4.0 cyber and physical production transport system duplicating.
The intelligent analysis system and remote sensing images segmentation engineering by using methods of advanced machine learning and neural network modeling
Authors: Tokarev K E , Orlova Yu A , Rogachev A F , Chernyavsky A N , Tokareva Yu M 
Published: January 2020

Abstract
The article describes the main stages of the development of an intelligent system for analysis and segmentation of remote sensing data using deep machine learning and neural network modeling. In particular, the environment for creating an experimental software module was chosen, an experiment on training a neural network was implemented and the results of the training sample were evaluated.
Efficiency of distance measures in the automatic grouping of electronic radio devices by k-means algorithm
Authors: Shkaberina G Sh , Tovbis E M , Kazakovtsev L A , Shemyakov A O , Romanov A P , Lukonin N V 
Published: January 2020

Abstract
This study investigates the problem of separation mixed lot of semiconductor devices for space applications into homogeneous production batches. The impact of distancemeasures in clustering algorithmk-means on the accuracy of the separating a mixed production batch is studied. This paper proposes the K-means algorithm withsquared Mahalanobis distance as an alternative the squared Euclidean distance. With the various combined mixed lots of semiconductor devices it was shown, that the proposed squared Mahalanobis distance highly depends on the method for determining initial cluster centers.
Application of artificial neural networks to diagnostics of fluid-film bearing lubrication
Authors: Kornaeva E P , Kornaev A V , Kazakov Yu N , Polyakov R N 
Published: January 2020

Abstract
The paper deals with the problem of monitoring the complicated hydromechanical system of a rotary machine with fluid-film bearings. The prospect of accurate recognition of changes in the lubrication system, which are expressed in the appearance of air bubbles in the lubricant, is investigated. The monitoring of the state is carried out by means of high-speed measurements of shaft vibrations, lubricant pressure supply and other parameters. Measurement data are transmitted for analysis to an artificial neural network to recognize the state of the system. The developed neural network has demonstrated high recognition accuracy of more than 98 %. Some recommendations on the measurement results processing and the neural network settings are represented in the paper.