bluuebunny/crossref_metadata_2025_split huggingface dataset:
Classification of medical images of patients with Covid-19 using transfer learning technology of convolutional neural network
Authors: Miroshnichenko A S , Mikhelev V M 
Published: February 2021

Abstract
The paper shows an approach to solving the problem of classifying X-ray images of the chest part of a healthy person and with the presence of COVID-19. The method is a trainable convolutional neural network. The results obtained allow improving existing approaches and methods in the field of classification of medical images with COVID-19, as well as obtaining an auxiliary mechanism for detecting COVID-19 in patients.
Techniques for reducing dimensionality of attribute space
Authors: Petrovsky A B 
Published: February 2021

Abstract
The paper describes techniques for reducing the dimensionality of attribute space where objects are represented as vectors, tuples and multisets with numerical and/or verbal characteristics. In these tools, many initial attributes are aggregated into a single integral index or several composite indicators with small scales of qualitative estimates. Aggregation of indicators includes various methods for transformation of attributes and their scales. Reducing the dimensionality of attribute space allows us to simplify the solution of applied problems, in particular, problems of multiple criteria choice, and explain the obtained results.
Sub-band identification of speech signals word fragments according to given sample
Authors: Zhilyakov E G , Belov S P , Belov A S , Medvedeva A A 
Published: February 2021

Abstract
The article considers the problem of the speech signals fragments, generated when pronouncing a certain word form, emphasis in the recordings, which is of the interest from the position of the speech information exchange analysis solvable applied problem. In this case, it is assumed that initially the class of the desired word form is given by the fragment available in the real speech signal recording. Therefore, it is natural to term the problem under consideration as precedent identification. The relevance of the methods and algorithms development for automatic precedent identification of voice recordings fragments in such situation is determined by the breadth of their possible applications, for example, in information and analytical security systems. The variability of the speech signals fragments properties, even generated when pronouncing the same word form by the same person, and the need to learn from one precedent in determining the critical areas of decisive functions are the main factors that determine the complexity of solving this problem. It is shown in this paper that sub-band analysis is an adequate basis for solving the problem under consideration, and an original mathematical apparatus was developed for its implementation. On the basis of original sub-band representations, the decision procedures for identification of speech signals recordings fragments, including the selection of pauses between word fragments, were developed. In particular, training procedures were proposed for one precedent while maintaining its original sub-band properties.
Formalization of system-object method of knowledge representation by calculation of systems as functional objects
Authors: Zhikharev A G , Matorin S I , Tinyakov O A , Shcherbinina N V , Migal L V 
Published: February 2021

Abstract
The paper considers some elements of the calculation systems as functional objects. The formal foundations of calculus of systems proposed by the authors were preceded by research on the development of a mathematical apparatus that allows formalizing the procedures for developing system-object simulation models of processes and systems. In the work, the previously developed formal apparatus is supplemented by the context operator, and some theorems related to the structural and functional characteristics of the modeled objects are formulated and proved. In particular, using the context operator, the statement is proved that the connection of a nodal object with the external environment generates the same connections of other nodal objects whose functions are realized due to the functions of the first nodal objects. It is shown that this statement is true for both incoming and outgoing connections with respect to a nodal object. Intrasystem connections are considered that are also capable of generating connections for their contextual node objects. In addition, the paper proposes a new formal record of the function of a nodal object for a situation when it is implemented due to the functions of other nodal objects. The proposed formalisms are considered on the example of a system-object model of an abstract system. In the future, based on the calculus of systems, optimization algorithms for system-object simulation models will be formulated according to various optimization criteria.
The intelligent system for monitoring and technical diagnostics of complex technological equipment in the agro-industrial complex
Authors: Zelyakovskiy D V , Sineva G N , Volobuev S V , Prokofiev P V , Tokarev K E 
Published: February 2021

Abstract
The article considers the intelligent system of control and technical diagnostics of complex technological equipment and flexible production systems developed by the authors. The provision of automatic selection of important parameters from the entire set of input and output parameters is due to the additional training of the neural network in the process and perhaps by increasing-decreasing the number of active neurons that do not lead to deterioration in the quality of technical diagnostics, but also due to the choice of excess neurons and their activation by retraining or failure of the neurons of the network. Diagnostic systems may include sensors, a computer system, and diagnostic signal display devices. The computational part of the system can contain modules implemented with the possibility of intelligent analysis and containing a dynamic model that is implemented on a trained neural network, and a module implemented with the possibility of additional training of the neural network and the selection of active and redundant neurons.
Model of an automated decision-making support system by a municipality in public transport management
Authors: Berisheva E D , Krushel E G 
Published: February 2021

Abstract
The static optimization model of passenger’s transport structure of small town is described. The transport network was interpreted by an oriented graph, whose vertices correspond to stops, and the arcs - parts of highways between stops. The route of transport was supposed to be given. The passenger traffic on each arc at the current fee was considered to be know.
Transaction from informative technologies to convergent ones: basis for students’ forming foreign languages communicative competence
Authors: Nekrasova T N , Popova O V , Sukhova E A , Mashlykina N D 
Published: February 2021

Abstract
Information technologies became an important part of our life and education. Traditionally, these technologies are mastered in the general education course of informatics and are applied in the wide range of disciplines study in both primary and in higher education. At the same time, recently there were significant changes in the technological sphere, which also affect the education. In particular, an important area of development is “Smart education and e-learning”, their possibilities are being intensively studied all over the world. However, the most significant changes in the sphere of information technology are the process of traditional technologies convergence and the technologies new quality formation: convergence of material and information technologies, convergence of information and cognitive technologies. Convergent technologies largely determine the priority areas of the society socio-economic development. This gives the reason to talk about the expediency of their development within the framework of general education. Modern trends in the modernization of educational programs require the application of teaching a foreign language modern methods. Converged technologies play an important role in foreign language teaching and are one of the best teaching tools. The use of convergent technologies is effective in increasing the level of teaching a foreign language, developing the students’ creative abilities in foreign language classes.
Context and future directions for integrating forest carbon into sub-national climate mitigation planning in the RGGI region of the U.S.
Authors: Lamb Rachel L , Hurtt George C , Boudreau Tee Jay , Campbell Elliott , Sepúlveda Carlo Edil A , Chu Hong-Hanh , de Mooy Jennifer , Dubayah Ralph O , Gonsalves Dena , Guy Madeleine , Hultman Nathan E , Lehman Shawn , Leon Bennet , Lister Andrew J , Lynch Cary , Ma Lei , Martin Christopher , Robbins Nathan , Rudee Alexander , Silva Carlos E , Skoglund Christopher , Tang Hao 
Published: February 2021

Abstract
International frameworks for climate mitigation that build from national actions have been developed under the United National Framework Convention on Climate Change and advanced most recently through the Paris Climate Agreement. In parallel, sub-national actors have set greenhouse gas (GHG) reduction goals and developed corresponding climate mitigation plans. Within the U.S., multi-state coalitions have formed to facilitate coordination of related science and policy. Here, utilizing the forum of the NASA Carbon Monitoring System’s Multi-State Working Group, we collected and reviewed climate mitigation plans for 11 states in the Regional Greenhouse Gas Initiative region of the Eastern U.S. For each state we reviewed the (a) policy framework for climate mitigation, (b) GHG reduction goals, (c) inclusion of forest activities in the state’s climate action plan, (d) existing science used to quantify forest carbon estimates, and (e) stated needs for forest carbon monitoring science. Across the region, we found important differences across all categories. While all states have GHG reduction goals and framework documents, nearly three-quarters of all states do not account for forest carbon when planning GHG reductions; those that do account for forest carbon use a variety of scientific methods with various levels of planning detail and guidance. We suggest that a common, efficient, standardized forest carbon monitoring system would provide important benefits to states and the geographic region as a whole. In addition, such a system would allow for more effective transparency and progress tracking to support state, national, and international efforts to increase ambition and implementation of climate goals.
Electricity Consumption in Construction Projects in the Czech Republic
Authors: Nový M , Nováková J 
Published: February 2021

Abstract
The paper deals with the development of electricity production in the Czech Republic and its consumption in the construction industry. The research specifies individual types of appliances - electric motors, lighting, heating, water heating and information technology in a selected newly constructed building. Construction machines with electric motors have been taken out of the itemized budget of the construction, their electric power input and time of their use have been determined. In order to determine other consumption, the equipment of a construction site, individual electrical appliances, their power input, number and time of their use have been proposed. Methods of consumption measuring and its division into the implementation costs of constructions in the way usual in the Czech Republic are presented. Furthermore the possibilities of optimizing electricity consumption costs within the project management by choosing a supplier and discussing other possible measures during the construction process have been considered.
Humus state of the soil under liquid manure application on Kuban rice crops
Authors: Sheudzhen A Kh , Gutorova O A 
Published: February 2021

Abstract
The aim of the work is to study the effect of liquid manure application on the humus regime of gleyic and chernozem soil when growing rice. On the Maryano-Cheburgolsky irrigation area of the rice irrigation system of the Krasnoarmeysky district of Krasnodar Territory, field experiment was conducted with the autumn and spring application of slurry both separately and together with the nitrification inhibitor Entec FL DMPP against the background of mineral fertilizers. Soil samples were taken before sowing, during the growing season, and after harvesting rice from the plowing layer. The content of total and water-soluble humus, total nitrogen, humus composition were determined. The redox potential was measured in undisturbed samples. Autumn and spring application of liquid manure into the soil in the amount of 30 t/ha, as well as the joint application of organic matter with a nitrification inhibitor, contributed to the preservation and replenishment of humus, improving its qualitative composition. Under their influence, the recovery processes in the soil are intensified and the content of water-soluble humus increases by 0.88-1.66 × 10-3 % C compared to the control without fertilizers and by 0.59-0.137 × 10-3 % C relative to the mineral background. The greatest effect was observed when the nitrification inhibitor was included in the slurry and applied in the autumn. The agrotechnical method contributed to an increase in humic acids in the soil and the transition of humus from humate-fulvate to humate type (CHA: CFA=2.01-2.03), humus enrichment with nitrogen (C: N decreases from 8.7-9.0 to 8.0), and increasing the mobility of water-soluble organic matter during the growing season of rice.
Thermal performance and efficiency of extruded absorber solar collector
Authors: Petrukhin V A , Veselova N M , Plotnitsky I O , Kalashnikova O V , Chernousov P S 
Published: February 2021

Abstract
Thermal characteristics of a solar collector are presented in the article. A collector with extruded profiles is considered as the solar collector studied model, which allows increasing the efficiency of heat transfer and reducing heat loss to the environment. The calculation showed that with the intensity of solar radiation from 450 W/m2 or more, the efficiency of using solar energy of the collector is more than 50%. The heat-storage medium heating degree in it should not be more than 30-35 °C to obtain the maximum heat output of the collector with extruded profiles. The coefficient of heat removal from the collector with a change in the arrival of solar radiation and with a change in the temperature of the heat-storage medium in the collector ranges from 0.854 to 0.877.
Kinematics loading manipulators of the parallel-to-serial structure based on a tripod
Authors: Vorob’yeva N S , Zhoga V V , Dyashkin-Titov V V , Nesmiyanov I A 
Published: February 2021

Abstract
Design features of manipulators of a parallel-serial structure based on a tripod are considered. kinematic diagram of a manipulator-tripod on a rotary base is presented, consisting of two series-connected manipulators - a manipulator-tripod of a parallel structure and a manipulator of a serial structure, and its configuration is considered, which is determined by solving an optimization problem from the condition of a minimum criterion of generalized energy. The sequential manipulator acts as a gripper. The number of degrees of freedom of the manipulator is seven. As actuating links, links with electric DC drive (actuators) are used. All actuators are equipped with an integrated analog displacement sensor. In the structure of the manipulator, the axes of the drive links of linear movement geometrically converge at one point by means of a spherical five-movable hinge assembly, which eliminates the appearance of bending moments in them from external loads from the side of the gripping device. The results of the implementation of the algorithm for constructing the service area of a manipulator of a parallel-sequential structure with a grip are presented.
The use of electroactivated solutions for plants phytosanitary optimization in a forest-agricultural landscape
Authors: Belitskaya M N , Gribust I R , Drevin V E , Minchenko L A , Bakradze N Yu 
Published: February 2021

Abstract
Electrochemically activated liquid systems stimulate biological processes of plant life, at the same time, these funds are ecologically safe and budgetary [9]. This paper presents the results of evaluating the electrochemically activated solutions use effectiveness in a forest-agricultural landscape. Pre-sowing seed treatment with the use of biologically active systems has a pronounced positive influence on the growth and development of plants. This contributes to the increase in their resistance to harmful organisms, while the reactions of harmful biota are individual: the decrease in the crops density by pests (by 20.0-78.1%) and diseases (by 76.2-92.0%) are lower in comparison with untreated ones. The combination of pre-sowing seed treatment with the treatment of vegetative plants provides a better result.
Efficiency assessment of waste filtration of motor oils over grainy partitions
Authors: Maltseva E I , Keruchenko L S , Zakharov S V 
Published: February 2021

Abstract
The article discusses the further use of used engine oil (UEO). The article presents the types of bulk materials that can be used for cleaning UEO. The advantages and disadvantages of ultrafiltration are considered. It is shown that the filtering material is characterized by a number of parameters that affect both the parameters of the filter and the efficiency of the process of cleaning the treated UEO. The mathematical model determining the dynamics of the filtering material capacity change is obtained. The results of theoretical study of pollution dynamics are compared with experimental studies. The obtained dependencies allow one to determine pressure losses and filter capacity for engineering calculations. The analysis of the influence of Reynolds’ criteria and homogeneity on the Euler criterion shows that with the increase of both Reynolds’ criterion and homogeneity criterion there is an increase in the Euler criterion, which indicates an increase in pressure loss on the filter due to its contamination.
Determining threshold values of operating motor oils to diagnose internal combustion engines
Authors: Myalo O V , Myalo V V , Prokopov S P , Korchagin P A 
Published: February 2021

Abstract
Technical fluids (engine oil, antifreeze) have to meet their requirements during the standard operating life to ensure the standard service life of combustion engine systems and mechanisms. The stability of the engine oil during engine operation depends on many factors. Motor oil touches all the processes in the internal combustion engine and can serve as a source of diagnostic information, which will make it possible to carry out maintenance and repair of engine parts as needed, to increase the reliability and durability of the internal combustion engine. The results of the oil sample analysis for each indicator allow us to draw distribution density curves for the serviceable and faulty engine condition. Following the results of the analysis, it is necessary to compare the value of the index with its threshold values, separating the zone of operation condition from the zone of the engine faulty condition. Since the number of serviceable engines under operating conditions is always greater than the number of faulty ones, at the first stage of oil quality control, it is possible to determine the threshold values of indicators separating the zone of normal wear (engine serviceable condition) from the zone of increased wear. The research has resulted in an algorithm for calculating and determining the threshold values of motor oils for tractor engines operated on farms in the Omsk region. The authors selected the values based on two oil indicators: kinematic viscosity at 1000 C and flashpoint. The distribution and probability integral of these indicators are better smoothed out by the normal Gauss law. The researchers obtained the maximum and minimum values of indicators corresponding to the 5% boundary of the probability integral.
Seed qualities variation of spring wheat grain depending on its alignment
Authors: Keler V V , Martynova O V 
Published: February 2021

Abstract
Choosing the optimal seed size plays a significant role in obtaining a high grain yield with excellent technological, seed and yield qualities. The obtained experimental material will allow agricultural enterprises to form batches of grain with high food and seed qualities, depending on the grain alignment. The purpose of this work was to assess the impact of seed size on seed quality indicators of soft spring wheat. The role of alignment in the formation of germination energy, growth strength and germination of soft spring wheat seeds was studied. As a result, it was found that the germination energy of spring wheat seeds reached a maximum in fractions of size from 2.5 mm to 3.0 mm and from 3.0 mm and above – 93 %. The variation of the indicator was low 8 %. The strength of seed growth was subject to a high and medium degree of variation in fractions (18-43 %). Not one of the fractions could form seeds with a growth strength of 60 % consistently. Seed germination was close to 100 % for grains with a size of more than 2.5 mm and reached a maximum for seeds with a thickness of more than 3.0 mm. The difference between the germination of the smallest fraction and the other two ones was more than 40 %, and its average value was at the level of 56 %.
Influence of various elements from cultivation technology on the buckwheat yield
Authors: Keler V V , Demeneva A A , Martynova O V 
Published: February 2021

Abstract
Buckwheat is a very valuable food crop, widely in demand not only in Russia, but also in the world agri-food market. Buckwheat belongs to pseudo-grain culture and is therefore of particular interest for crop rotation diversification and is suitable for organic farming. Scientists have long faced the question about the reasons for obtaining low yields of buckwheat grain with the high biological yield potential. We can talk about two groups of reasons that reduce crop productivity: the first are agrotechnical, the second are biological. Agronomic reasons are sowing buckwheat after bad and clogged previous crops, often after spring plowing, insufficient weed control before sowing, insufficient mineral nutrition, untimely sowing, poor plant care, lack of pollinators, large losses of grain during harvesting. The biological causes include dimorphism of flowers. The purpose of this work is to determine the influence of growth stimulant, fertilizer and previous crops on the buckwheat yield in Siberia. The role of adding ammonium nitrate and the use of the growth stimulant «Zerebra Agro» in the productivity formation of this crop was studied, as well as the influence of previous crops on its yield value. Six varieties of buckwheat were used as the object of research. Analysis of influence indicators in our studies revealed that buckwheat yield depends by 19% on its previous crops, by 12% on the means of intensification, by 29% on the interaction between the previous crops and means of intensification and by 39 % on unaccounted factors.
Perfection of technology of crops of seeds of water-melons in the conditions of a droughty climate
Authors: Kravchenko I A , Krasnov I N 
Published: February 2021

Abstract
Seeding of watermelons in the dried up soil are accompanied by a delay of shoots and even destruction of a part of plants. In an initial stage of growth and development watermelons are very water consuming. In this connection directions of scientific researches and constructive workings out on perfection of technology and means of preparation and crops of seeds of watermelons in the conditions of a droughty climate represent rather actual problem of an agricultural production.