bluuebunny/crossref_metadata_2025_split huggingface dataset:
Methodology of adjusting the strategy of technical systems maintenance and repair according to the results of their operation
Authors: Gera V , Mosyagin R , Kalmykov E , Pudikov V 
Published: December 2021

Abstract
In the publication the authors solve the problem of forming the optimal volume of control actions to maintain the technical systems (TS) service availability. To achieve the desired result the analysis of the TS as a service object was carried out. As a result of the analysis the system elements with a level of reliability below the required level are assigned to a separate group for which the maintenance modes are formed later, their actual state being taken into account. Namely, the decision is made what work on these elements can perform and what forces and means of the technical support system will be required for their operation. To form a list of necessary operations, the functional scheme analysis of the TS considered is carried out, during the analysis the functional as well as degradation characteristics of the system elements are determined as well as the significance (weight) of each element in the system. The analysis of the functional scheme of the TS is performed by using the functional-topological method.
Tension devices: mathematical modeling and applications in water transport
Authors: Fokin R , Abissova M , Atoyan A 
Published: December 2021

Abstract
Tension devices -are throwing devices, the action of which is based on the elastic tension of the plates (shoulders), in fact, these are bows and crossbows. Currently, various types of bows and crossbows controlled by a single shooter are widely used in hunting and sports. In the ancient World, high-power crossbows were used as artillery, served by several warriors: ballistae, scorpions and others. In the paper, bows and crossbows of all currently common types are modeled using mathematical methods. This model, which is the subject of this paper, differs from similar ones, which actually model only traditional English bows. All these models have the main purpose of analytical calculation of the speed of the arrow at the moment of its separation from the bowstring. Our model uses the law of conservation of energy, considering only the initial and final moments of acceleration of the arrow. It identifies 2-4 implicit indicators that fully describe each type of tension devices. To obtain input data, 2-3 experimental shots are made with 1-2 parameters measured each time. As a result, the calculations are reduced to solving systems of linear equations and to calculations using formulas. The paper offers 3 areas of application of tension devices on water transport, firstly, ship management and its operational repair (for this purpose, analogues of ancient powerful crossbows are relevant), secondly, protection of the ship, cargo, anti-terrorism, and thirdly, physical education and sports for the crew and passengers. The use is due to their fire safety, power, low noise, a variety of types of projectiles.
Efficiency of cluster schemes implementation for discrete dynamic programming for systems of support of dispatching technological processes in transport systems
Authors: Reznikov M , Fedosenko Y 
Published: December 2021

Abstract
Within the framework of a computationally complex canonical scheduling problem, formulated by an optimization model for one-processor servicing of a finite deterministic flow of objects, a scheme of computational process of an algorithm of discrete dynamic programming in cluster implementation is considered. Variants of balancing of computational subtasks over network cluster array are investigated, purposed to reduce the volume and intensity of intranetwork interaction. It has been established that for practical improvement of efficiency of cluster algorithm, it is required not to increase the uniformity of distribution of subtasks among the cluster nodes, but to minimize the network traffic between the cluster nodes. Balancing options are proposed that allow to significantly increase localization of data in network computing. Experimental results are analytically confirmed, showing the scaling limits of implementation of discrete dynamic programming algorithms on a cluster architecture. The method for choosing the number of computational nodes and dimension of the problem being solved, which provide a threefold reduction in overhead costs for network exchange, is shown. The results obtained make it possible to objectively substantiate the choice of methodological and algorithmic approaches when choosing computer tools developing architectural and technological solutions for dispatching systems support in inland water transport.
Method of characteristics for the problems of stages of the serviceability check of elementary section of a gas pipeline for operation
Authors: Khujaev I K , Aminov Kh , Akhmadjonov S , Ismailov A 
Published: December 2021

Abstract
The article is devoted to modeling the gas-dynamic state of an elementary section of a gas pipeline during gas injection and its outflow through the choke in the final section of the pipe and to solving these problems using the method of characteristics. The subject of the study is the gas-dynamic state of an elementary horizontal section of a gas pipeline in the process of checking its serviceability for operation. The processes of gas injection into the section and gas outflow from it, considered in the article, were modeled using the N.E. Zhukovsky formula on gas outflow into unbounded space in a framework of the short pipeline approach. The original equations are linearized by introducing the mass flow rate of gas and waves traveling in two directions. When solving the problem, the method of characteristics was applied; numerical results were obtained and analyzed using an analytical solution to the problem. The research methods are based on the laws of conservation of momentum and gas mass, the d’Alembert method for solving a system of hyperbolic equations and the methods of conducting a computational experiment. An analytical solution to the problem with a rupture caused by an instantaneous change in the gas pressure at the end of the section is obtained. It is shown that the process proceeds with the formation of compression and rarefaction waves, and their multiple reflections at the ends of the section. The gas in the section tends to a state of rest with time, and the changes in the mass flow rate and gas pressure are of exponential nature.
Design and research on intelligent ventilation system of ship cargo hold
Authors: Ba Zhongfeng , Zhang Zhijie , Zong Yonggang 
Published: December 2021

Abstract
Ventilation in the cargo hold of ships, which can adjust the temperature and humidity in the cargo hold, is a necessary measure to ensure the safety of maritime cargo. Traditional ship cargo hold ventilation includes natural ventilation and mechanical ventilation. Its ventilation effect is limited, which often leads to cargo damage accidents such as mildew of the cargo in the cabin. Based on the research of intelligent cargo hold ventilation technology, this paper proposes a design scheme of ship cargo hold ventilation system. The ventilation system includes a system platform and electrical connection elements supported by the system platform. Among them, the system platform is electrically connected to the concentrator, the concentrator is electrically connected to several collectors and electric control devices, the collector is electrically connected to several collection nodes, and the electric control device is electrically connected to the ventilation device. The collection nodes of the ventilation system, including temperature and humidity sensors, air pressure sensors, and wind speed and direction sensors, are installed in the cargo hold of the ship. The collection nodes are evenly distributed in multiple locations in the cargo hold of the ship, effectively monitoring the temperature, humidity, air pressure, wind speed and direction of the cargo hold of the ship, and transmitting it to the system platform through collectors and concentrators to realize real-time monitoring. According to the setting of different environmental standard values, it can automatically complete the startup, shutdown and reverse operation of the wind turbines in different positions, making the system more accurate in monitoring the environment of the ship’s cargo hold, effectively reducing cargo damage, ensuring the safety and economy of maritime freight, and It can more effectively save energy, reduce carbon emissions, protect the environment, and make the system more practical.
Modeling processes that provide an avalanche of innovation growth
Authors: Diakonova S , Artyshchenko St , Medvedeva N , Gusev M 
Published: December 2021

Abstract
This paper proposes an addition to Kondratyev’s theory of the emergence of innovations in long cycles. Regularities of the emergence of crisis phenomena and the concept of “avalanche-like growth of innovations” are considered. The study investigated the innovation peaks occurring in the middle of the depression phase, followed by the growth stages of economic activity after a certain period of time. Research has shown that the active emergence of innovations, which we have called the “snowballing growth of innovations,” falls in the middle of the depression phase. The authors investigated and supplemented the theory of the triggering effect of depression, which is similar to the action of the trigger, which results in an “avalanche-like growth of innovations”. To describe the processes associated with resonance and trigger effects, the authors propose to use the parametric resonance model and the Mathieu equation. With the help of mathematical modeling of innovation processes, a more accurate description of the periodic change in the number of innovations over time is possible, namely, the “avalanche-like growth of innovations”.
Development of algorithm for fuzzy art appraisal model
Authors: Nosov V V , Tindova M G 
Published: December 2021

Abstract
This paper presents an algorithm for a fuzzy art appraisal model, which is a hierarchical model based on a base price and the following adjustment. In the first step of the model, we determine the list of linguistic variables, their number, types of terms and types of membership functions for each term. Then, we analyze the subject area, process expert information and build a knowledge base containing 50 predicate rules of inference. The analysis shows that the model reflects a 4.37% error in a porcelain figurine appraisal. The paper also outlines recommendations on the implementation of the developed algorithm for fuzzy art appraisal model using Fuzzy Logic Toolbox for Matlab package and explains package limitations such as the need for strong authentication of art pieces, identification of mass artworks and a limited range of artwork that can be appraised.
Modeling of material flow management processes in the formation of transport logistics chains
Authors: Shvetsov A V , Dondokov Y G 
Published: December 2021

Abstract
The article proposes a mathematical model for optimizing the interaction of road and sea transport. The model allows to optimize the process of material flow management in the formation of transport logistics chains. The solution to this problem is especially important given the observed growth of competition between operators carrying out cargo transportation along international transport corridors. The application of the model is aimed at reducing the idle time of both vehicles waiting for unloading in the port, and reducing the idle time of ships awaiting loading of ships in ports. The relevance of using the proposed model is based on the constant growth of cargo traffic going through the ports, as well as the existing restrictions expressed in the lack of space for storing goods in anticipation of the arrival of ships in most modern ports participating in international cargo transportation, in addition, an important factor is that in most of these ports the time the passage of trucks to the port is regulated by certain hours of the day.
Mathematical modeling of traffic volume in the suburban area based on the time series decomposition
Authors: Pechatnova E V , Kuznetsov V N 
Published: December 2021

Abstract
This study aims to the development of mathematical modeling methods based on time series decomposition. This method is used to describe various consistency or recurrence processes. Such a process is the distribution of traffic volume throughout the year. Its modeling is one of the leading research tasks in the transport sector. One of the urgent tasks is the assessment and forecasting of the traffic volume in the suburban areas. The study is carried out on the road section P-256 Chuysky Trakt (Novosibirsk - Barnaul - Biysk - Gorno-Altaisk -state border with Mongolia) near Biysk. Traffic data is obtained for 2019. Python is used in modelling. The statmodels module is used to decompose the time series. The multiplicative model is chosen. The adequacy of the model is checked on two groups of data. The first is the traffic volume data on the same road section for 2020. The average relative error was 5%. The second is the road section A-322 Barnaul - Rubtsovsk - the state border with the Republic of Kazakhstan in the suburban area of Aleysk. The average relative error was 6%. The results confirm the adequacy and versatility of the model.
The research development of the structure in a-Fe Microcrystals with the Orientation <110> deformed by compression with different values of the friction coefficient
Authors: Zavyalov A , Lukin A , Lukin O , Timofeyev A 
Published: December 2021

Abstract
The paper analyzes the change in the dislocation structure in a-Fe microcrystals with orientations <100> and <110> deformed by compression under conditions of limited flow with different values of the friction coefficient. The orientation stability of the microcrystal and texture is investigated when the compression axis deviates from the normal to the compression plane. Shooting and analysis of limited pole figures made it possible to establish that the operation of the OSS in the MC with the [100](001) orientation at different values of the friction coefficient at the sample-punch interface leads to a rotation of the latticework relatively to the MC axis. The specific conditions of plastic deformation under compression determined by the MC morphology prohibit displacement deyz., as the deformation is observed under conditions of limited flow. The operation of the OSS, consequently, leads to the MC partition with the [100] (001) orientation deformed by compression with the friction coefficient Kmax into parts and the rotation of the latticework around the growth axis. It is established the connection between the friction coefficient at the crystal-punch interface and the sliding geometry in a-Fe MCs deformed by compression under conditions of limited flow. The authors carried out the dimension of the friction ratio has a significant effect on the slip geometry and the dislocation structure formed in the MC of the [100] orientation deformed by compression along the (001) plane. Changes in the friction coefficient and the angle deviation of the compression axis from the normal to the compression plane in the MC with the [100] (001) orientation do not affect the slip geometry and the dislocation structure formed during plastic deformation.
Features of phase transformations in powder steels upon heating
Authors: Egorov M , Egorova R , Atrohov A , Ekilik V 
Published: December 2021

Abstract
At present, powder materials are used in practically all branches of industry, from medicine to aerospace technology. This is a wide range of materials ranging from constructional and instrumental materials and ending with special-purpose materials and medical implants. Powder metallurgy methods are most often used where the manufacture of products with desired properties is impossible using traditional methods: casting, stamping, etc. Heat treatment is understood as a set of operations of heating, holding at high temperatures and cooling in order to change the structure and workability of the material, improve the combination of its mechanical and physical properties without changing the shape and size of products. Heat treatment is an effective method for improving the physical and mechanical properties and wear resistance of steel. The specific features of sintered steels (porosity, structural heterogeneity, high oxidizability, etc.) make it difficult to use the technological modes of heat treatment developed for cast steels, although the main regularities of the processes occurring during heating and cooling of compact steel can be transferred to sintered materials. Heat treatment of powder steels has a number of features, primarily due to residual porosity, as well as chemical and structural heterogeneity.
Magnetic-abrasive finishing with new diffusion-alloyed materials based on dispersed metal waste
Authors: Panteleenko F , Petrishin G , Panteleenko E 
Published: December 2021

Abstract
The article discusses the issues of assessing the effectiveness of the use of new diffusion-alloyed ferromagnetic abrasive materials in the technology of magnetic abrasive finishing. The productivity of processing and the roughness of the processed surface were evaluated as they are considered to be the main performance criteria of ferric-abrasive powders (FAP). There were researched three types of powders: common Fe-TiC powder, obtained by the sintering (as a reference), and two new diffusion alloyed (borated and nitrocarburized) FAP, made of low-carbon finely dispersed ferrum-based wastes. Both new proposed diffusion-alloyed powders have better cutting characteristics then reference powder, explained by the structure features and their properties. Evaluation of productivity and roughness of surface shows, that there is their direct dependence of morphology, hardness and fragility of powder particles. The best cutting characteristics has borated powders, as they have microhardness 18,000-20,000 MPa and the tendency to brittle fracture, that leads to the new less-sized particles with sharp cutting edges creation.
Experimental study of the destruction in CFRP laminates at the macro-level by acoustic emission method
Authors: Severov P 
Published: December 2021

Abstract
The author conducted experiments using the method of acoustic emission under uniaxial tension of specimens of CFRP laminates with different stacking, geometry and stress concentration. The influence of a mutual arrangement of the material destruction zone and the extensometer installation site on the nonlinear deformation is revealed. It is shown that the damage accumulation process is highly informative when determining the energy of AE pulses. The possibility of visualizing the formation and development of destruction zones in orthogonal directions, as well as the possibility of determining the moment of crack start from the apex of the notch during splitting, is established. The mechanism of alternating stress relaxation in two developed zones of destruction is revealed. The paper shows a high degree of correlation between mechanic and acoustic-emission events. Finally, the author suggests assessing the mechanical state of material with the account of obtained damages by the degree of its integrity (one to zero) depending on the load history, its individual geometric features and stress concentration.
Determination of changes in the mechanical properties of polymer composites with the addition of agglomerates of WC nanopowder
Authors: Oleynik A , Chayka T , Gavrish V 
Published: December 2021

Abstract
Recently, there has been a growing interest in the development of new composite materials with improved characteristics. The article presents the results of tests of composite specimens based on aramid fabrics modified with WC nanopowder agglomerates obtained from carbide manufacturing waste. The following mechanical characteristics were investigated: transverse bending resistance, fracture resistance and energy absorption during contact with a physical body at high speed. According to the results, the transverse bending resistance increased by 35% at a WC concentration of 5%. When 3% WC powder was added to the matrix composition, the total crack length after impact was almost halved. The largest increase in energy absorption of the samples was about 30% at 1% additive concentration. The significant increase in the investigated parameters can be explained by the complex morphology of the embedded particles. In further investigations it is planned to study in detail the mechanism of distribution of nanodispersed WC powder additive in the volume of the modified material.
Mixed magnesian binders using local silicate waste production
Authors: Lytkina E 
Published: December 2021

Abstract
Today, the waste of the mining industry is more than 8 billion tons. Analysis of the literature data showed that most of the man-made waste that is generated as a result of the development of mineral deposits is suitable for use in many industries, in particular, in the production of building materials. The use of technogenic raw materials allows us to solve the following tasks: Environmental aspect - reducing the number of dumps and reducing their volumes. And this, in turn, improves the ecology of regions and territories. 2. Economic aspect - reducing the cost of construction products through the use of almost free raw materials, the release of more competitive products. Of course, it is necessary to provide that part of the costs will be spent on additional processing, revision, activation, modification of this technogenic raw material component. But today we have to think about how to clear the territory of substandard “waste rock” and use it to reduce the production and consumption of natural raw materials. A similar process can create waste-free production.
The relationship of casting conditions with the structure and properties of sacrificial materials
Authors: Kireev A V , Kechin V A 
Published: December 2021

Abstract
The application of cast protectors in systems of cathodic protection of metal structures and structures from electrochemical corrosion is well known. Alloys based on aluminum, magnesium and zinc are widely used as sacrificial materials for the manufacture of sacrificials. The choice of designs and standard sizes of protectors is carried out taking into account the provision of the required service life of the protector protection systems in various operating conditions. The structure of cast protectors plays an important role in stabilizing the electrochemical characteristics of sacrificial materials. The paper describes the characteristics of sacrificial alloys and cast sacrificials, and also shows the influence of casting conditions on increasing the values of the efficiency factor (KPI) of sacrificial materials.
Quantitative characterization of the microstructure of in situ aluminum matrix composites
Authors: Prusov E S , Shabaldin I V , Deev V B 
Published: December 2021

Abstract
A quantitative assessment of the microstructure parameters is necessary for making informed decisions on the development and adjustment of technological parameters for the production of cast metal matrix composites. This study gives an estimate of the size and distribution of the reinforcing phases in the structure of in-situ Al-Mg2Si aluminum matrix composites using an automated technique for analyzing metallographic images realized in the ImageJ open-source software with developed macros. A comparison of the quantitative parameters of the microstructure of composites in different parts of the ingot is carried out. The central regions of the ingot are distinguished by higher values of the average quantity of particles per unit of the microsection surface area in comparison with the peripheral regions. The average size of the synthesized Mg2Si reinforcing particles was 16 μm and practically did not vary in different areas.