bluuebunny/crossref_metadata_2025_split huggingface dataset:
Sufficient conditions for the stability of linear periodic impulsive differential equations
Authors: Bivziuk V. O. , Slyn’ko V. I. 
Published: September 2019

Abstract
Abstract linear periodic impulsive differential equations are considered. The impulse effect instants are assumed to satisfy the average dwell-time condition (the ADT condition). The stability problem is reduced to studying the stability of an auxiliary abstract impulsive differential equation. This is a perturbed periodic impulsive differential equation, which considerably simplifies the construction of a Lyapunov function. Sufficient conditions for the asymptotic stability of abstract linear periodic impulsive differential equations are obtained. It is shown that the ADT conditions lead to less conservative dwell-time estimates guaranteeing asymptotic stability.
Bibliography: 24 titles.
Predominant accumulation of a 3-hydroxy-γ-decalactone in the male rectal gland complex of the Japanese orange fly,Bactrocera tsuneonis
Authors: Ono Hajime , Nakahira Masataka , Ohno Satoshi , Otake Jun , Kanno Tomoya , Tokushima Isao , Higashiura Yoshimitsu , Nishi Ichiro , Nishida Ritsuo 
Published: September 2019

ABSTRACTThe Japanese orange fly, Bactrocera tsuneonis, infests various citrus crops. While male pheromone components accumulated in the rectal glands are well characterized for Bactrocera, but information regarding the chemical factors involved in the life cycles of B. tsuneonis remains scarce. Herein, several volatile chemicals including a γ-decalactone, (3R,4R)-3-hydroxy-4-decanolide [(3R,4R)-HD], were identified as major components, along with acetamide and spiroketals as minor components in the rectal gland complexes of male B. tsuneonis flies. The lactone (3R,4R)-HD was also identified in female rectal gland complexes. The amount of this compound in mature males was significantly higher than those observed in females and immature males. The lactone (3R,4R)-HD was detected in flies fed with sucrose only, indicating that this lactone is not derived from dietary sources during adulthood, but biosynthesized in vivo. The predominant accumulation of (3R,4R)-HD in mature males also suggests a possible role in reproductive behavior.
Stories of how to give or take – towards a typology of social policy reform narratives
Authors: Blum Sonja , Kuhlmann Johanna 
Published: September 2019

ABSTRACTNarrative stories are crucial to policy change, as they decisively contribute to how policy problems and policies are defined. While this seems to apply for social policy in particular, narrative stories have remained under-researched and not systematically compared for this area. In this article, we theorise on narratives in social policy by focusing on how similarities and differences between narratives in old- and new-social-risks policy reforms can be conceptualised, taking into account expansion and retrenchment. To systematically link those types of social policy reform with narrative elements, we rely on stories of control and helplessness, as well as the deservingness or undeservingness associated with different target populations. Thereby, distinct types of social policy reform narratives are identified: stories of giving-to-give, giving-to-shape, taking-to-take, taking-to-control, and taking-out-of-helplessness. The article concludes with empirical illustrations of those narrative types, which stem from the case studies presented in this Special Issue.
Determination of representative features when building an extreme recognition algorithm
Authors: Fazilov Sh Kh , Mirzaev N M , Radjabov S S , Mirzaeva G R 
Published: September 2019

Abstract
The problems of determining the representative features when constructing an extremal pattern recognition algorithm defined in a high-dimensional feature space are considered. As an initial model, a model of recognition algorithms based on radial functions was considered. The procedures for extracting subsets of interrelated features and selecting a set of representative features when constructing an extremal algorithm within the framework of the recognition model under consideration are presented. The main idea of the first procedure is to form a set of features that are unrelated (or are connected rather weakly) among themselves. The essence of it is as follows. The studied subsets of features are combined into one subset if they are close enough to each other in a sense. Otherwise, they belong to different subsets. The main idea of the second procedure is to define a representative element in each subset of tightly coupled features. The choice of an element from the considered subset of tightly coupled features is made on the basis of an assessment of the proximity of features. It is required that among the selected set of features there should not be tightly coupled features. The main advantage of the proposed procedures is to improve the accuracy of the results of allocating subsets of tightly coupled features when building a recognition algorithm under conditions of large dimensionality of the feature space and determining the quantitative evaluation of these subsets. In order to assess the performance of the developed procedures, experimental studies were carried out. The application of the developed procedures allows to more accurately determine the unknown parameters of recognition operators in the space of features of large dimension.
About problems of decoding and searching for the maximum upper zero of discrete monotone functions
Authors: Kabulov A V , Normatov I H 
Published: September 2019

Abstract
This article explores the algorithms for solving individual classes of discrete extremal problems to find the exact optimum. When obtaining algorithms, the procedures for decoding and finding the maximum upper zero of discrete monotonic functions are used. Formulations of the tasks of decoding and searching for the maximum upper zero of discrete monotonic functions are formulated. To solve the problems of decoding and searching for the maximum upper zero of individual classes of 3-digit monotonic functions, estimates are given for the complexity of deciphering monotonic functions in a class.
Mathematical modeling regulatory mechanisms of a viral infection caused by hepatitis D virus with taking into account co-infection and super-infection
Authors: Saidalieva M , Hidirova M 
Published: September 2019

Abstract
The purpose of this paper is to develop mathematical and computer models for the regulatory mechanisms of the interconnected activity between liver cells, the hepatitis B virus and hepatitis D virus molecular-genetic systems at hepatitis D infectious process. The paper draws the results made by using methods of quantitative and qualitative analyse of functional-differential equations. The paper concludes that the developed model which has oscillatory mode, chaotic regime and destructive changes that can be identified by chronic hepatitis D with intermittent crisis, with severe hepatitis D and liver cirrhosis. The paper provides a new mathematical and computer models which are able to describe hepatitis D regulatory mechanisms and to diagnose the infectious process course and predict the outcome of disease.
Velocity analysis of a spherical parallel robot
Authors: Glazunov V A , Filippov G S , Rashoyan G V , Aleshin A K , Shalyukhin K A , Skvortsov S A , Antonov A V , Terekhova A N 
Published: September 2019

Abstract
A spherical mechanism of parallel structure containing three kinematic chains and performing spherical motions is presented. A distinctive feature of the architecture of the spherical mechanisms is the provision of the constancy of the position of the point – center of rotations. This characteristic causes a wide range of applications of these mechanisms. The kinematic analysis of the mechanism is based on the differentiation of the coupling equations imposed by the kinematic chains. As a result of differentiation, a matrix is obtained by means of which it is possible to solve the direct and inverse problems of kinematics. The velocity analysis is necessary to control the robot and its dynamic analysis.
Complex approach to the optimal energy efficient work pattern for vibratory roller
Authors: Mikheyev V V , Saveliev S V , Permyakov V B 
Published: September 2019

AbstractSoil compaction of fills performed by surface force is a process of key importance for road construction. Road rollers represent the most widespread type of compactors. Improvement of both quality of compaction and output of roller is technological problem of great interest. The key point for its solution is optimal choice of combination of parameters which determine the force causing plastic deformation of the soil layer. Theoretical consideration of the process is given in the framework of interaction between massive elastoviscoplastic region of soil layer and source of external surface force. It naturally produces resonance criterion for the energy effective compaction. Minimum value of mechanical resonance in respect to external force allows to find the combination of working regime parameters for the given type of roller. Results of experiments involving sandy loam and clay loam proved the results of numerical modeling and gave key for recommendations on combined speed-frequency energy effective regime of compaction for given types of soils by smooth drum vibratory roller.
Analysis of datum schemes for multi-faceted cutting inserts in cutting
Authors: Vasilyev E V , Zakharova N V , Abakumov A N , Popov P E 
Published: September 2019

Abstract
Renovation of multi-faceted carbide inserts is one of the important problems of tool-making. One of the problems of tool renovation is its datum. Taking into account the volume of the tool, it is necessary to ensure not only its datum accuracy, but also the ability to automate the recovery process. Various mounting modes of multi-faceted carbide inserts are considered, and the method providing the maximum accuracy of datum and quick-release is proposed.
Consideration of Socium as Mechanical System with Stream Control
Authors: Florensov A N , Gritsay A S 
Published: September 2019

Abstract
Mathematical modeling of socium as mechanical system with the material components determined by parts of system with qualitatively excellent complexes of properties concerning production, storage and consumption of production is considered. Existence of objectively operating feedback in the representing system is established. The mathematical model formed in work appears the nonlinear system of the ordinary differential equations and is far-reaching expansion of classical models Lotka and Volterra. The mathematical analysis shows existence of a fixed point in phase space of solutions of system and gives for her analytical expressions. Results of private numerical modeling of the offered model are presented. Results of modeling show manifestations of difficult oscillatory dynamics of phase trajectories of the solution of system and serve as an essential argument of an explanation of real oscillatory processes in the history of social systems.
Setting and solving the game confrontation problem of the hardware-redundant dynamic system with an attacking enemy operating under incomplete information in the conflict process
Authors: Potapov V I , Gritsay A S , Chervenchuk I V , Makarov V V , Kuznetsova O P , Kondratukova L K 
Published: September 2019

Abstract
The game task of confrontation of the attacked hardware-redundant dynamic system with an attacking enemy operating in conditions of incomplete information about the behavior of the attacked enemy in the process of conflict was posed and solved numerically and analytically.
The attacking party aspires to increase the intensity of the failures of the components of the attacked system at the expense of its attack resources, up to its total failure. The attacked party, due to the corresponding strategy of redistribution of reserve blocks of the hardware-redundant dynamic system between the failed main blocks at the appropriate instants of time, strives to maximize the probability of failure-free operation of the attacked system at the end of the confrontation (game) with the attacking enemy.
Behavior of the system under attack in the process of conflict is approximated by the Markov process, and the number of operable states is equal to the number of failed functional blocks that do not exceed the number of standby blocks. As a payment function in the game in question, the probability of failure-free operation of the attacked system is used by the time the game ends. The solution of the game is the vector of the system setup moments after the corresponding failures of the functional blocks and the set of reservation vectors corresponding to the instantaneous settings of the system being attacked, which maximizes the probability of system failure during the conflict.
The differential game model is reduced to a multi-step matrix model with given probabilities of the states of the attacking enemy. Numerical algorithms for calculating the vector of reservation for the attacked system that maximizes the probability of its trouble-free operation by the end of the game and for solving the game problem in question are presented in a form convenient for implementation on a personal computer.
Biometric authentication on the basis of lectroencephalograms parameters
Authors: Sulavko A E , Samotuga A E , Stadnikov D G , Pasenchuk V A , Zhumazhanova S S 
Published: September 2019

Abstract
Static biometric patterns such as fingerprint, iris and face are difficult to keep secret. Since the open pattern has a little potential replacement options stealing a strange open biometrics provides great opportunities for compromising systems. Authentication on the basis of electroencephalogram pattern (EEG) is the most secure kind of biometric security. The present study aims to develop a method of biometric authentication by the EEG data with high accuracy. Several neural network EEG pattern verification algorithms have been tested. A method for verification of the human EEG pattern based on a modified Bayes hypothesis formula has been developed. The following error indicators FAR <10-4 with FRR = 0.062 were achieved.
This work was supported by the Russian Foundation for Basic Research (RFBR) and the Government of the Omsk Region (grant 18-41-550002).
Equipment desing automation at asphalt-concrete production modernization
Authors: Belyaev P S , Frolov V A , Trapeznikov E V , Belyaev V P , Makeev P V , Shashkov I V 
Published: September 2019

Abstract
The relevant task in the field of road construction and maintenance is gradual transition to the production of asphalt-concrete mixtures on polymer-bitumen binders. Most asphalt-concrete plants of small and medium capacity consider this transition as challenging due to a relatively high cost of the specialized equipment for polymer-bitumen binders production. Most proposed techniques involve the utilization of colloid mills. The practice of such mills operation shows that production lines experience long downtime periods due to the necessity of preventive maintenance and repair. A promising direction in polymer-bitumen binders manufacture is to use polymer waste materials for the bitumen modification. This provides the reduction of the modified binder costs and the solution of environmental problems. The paper deals with the problem of asphalt-concrete plants modernization to obtain polymer-bitumen binders in its own production using agitated mixers common in the chemical industry. Optimization problem is formulated for design and operating parameters of such equipment to provide required quality indicators for the resulting polymer-bitumen binders. Algorithmic and software assistance is developed to solve the set problem. The proposed technical solutions were tested when solving the modernization problems regarding the process diagram of the asphalt-concrete plant to release products on polymer-bitumen binder of its own production.
Data measuring system to determine the solvent diffusion coefficient in products from capillary-porous materials
Authors: Belyaev V P , Varepo L G , Belyaev P S , Divin A G 
Published: September 2019

Abstract
The development of methods and means for non-destructive product testing is the current task of modern instrument-making in the study field of porous materials ability to transport the substances distributed in a solid phase. They allow one to determine the characteristics of mass transfer directly in the finished product, because they do not require the preparation of special samples of a given configuration and size, typical for most of the used methods and devices. The aim of this study is to develop data measuring system that improves the performance of studies of polar solvents diffusion in porous media. The data measuring system is designed to implement methods of the solvents diffusion coefficient control in fine and bulk products from isotropic and anisotropic porous materials with one-way access to flat surfaces of specified size products. The schematic of the data measuring system, virtual surface for experiment control, the flow chart for the measurement operations of the developed methods, the results of testing the system are given.
Strength and geometry parameters accuracy improvement of 3D-printed polymer gears
Authors: Glukchov V I , Varepo L G , Nagornova I V , Doronin F A 
Published: September 2019

Abstract
The study is concentrated on the topic of 3D-printed polymer gears quality improving issues in terms of both mechanical strength and geometric precisionat the production by FDM process. The conception of gears radial 3D-printing based on functional dimensional communications modelling between the basic and gear elements by string-mesh structure forming of even- and uneven numbered layers; printing gear layers are represented as stretched string system, pairwise and symmetrical placed related to the reference hole axis. Tangential dimensional communication of bidirectional tangent lines to generating circle was applied to the evolvement gears profiles forming. Formation of the gears tooth root on the basic circle accompanied with string-mesh layer structure forming will provide quality gears improvement.
Advanced morphological approach to finding novel solutions for automated finishing of GTE blades
Authors: Kondrat’ev I M , Rakov D L 
Published: September 2019

Abstract
This article deals with the search, structural analysis, synthesis and modelling of complex automatic systems during preliminary design phase on a basis of advanced morphological approach. The research aims were to develop and use an advanced morphological approach, a technique for modelling the new systems for automated finishing of gas turbine engine (GTE) blades. The approach is based on cluster analysis, set theory, set of rules and maximization a gain by the innovative automation systems potential. Based on this study, the proposed method shows a meaningful potential compared to the methods presently used.
The Appliance of Deep Neural Networks in the Process of Managing Chemical Enterprises
Authors: Kulyasova E V , Kulyasov N S , Yu Puchkov A 
Published: September 2019

Abstract
This article is introduced into the perspective tendencies of the digital transformation of chemical enterprises which allow to improve the process of managing enterprises of the branch. Presented the algorithms of managing and technological information processing based on deep neural network apparatus. New approaches to data processing known as video analytics are applied; it allows to automate the registration process of visual data at chemical enterprises and reduce the impact of the human factor on the objectivity of the decisions. The worked out algorithmic structures of managing and technological information processing allows to carry out the identification of hidden regularities there and ensure the effective achievement of goals at chemical enterprises.
Cache-aware algorithm for multidimensional correlations
Authors: Altman E A , Vaseeva T V , Aleksandrov A V 
Published: September 2019

Abstract
In the paper discusses a speed of a convolution or correlation functions in case of a big size of input data. When a data volume exceeds a cache size, a significant part of an execution time is spent on a loading data into the cache. A performance of correlation is explored an example of receiving a long radio signal by the use of comparison with a big number of patterns. To decrease this spending a method of reordering calculation and memory operations and is proposed. The method uses cache aware approach to construct cache friendly algorithms. A decreasing of execution time (in some case) achieves up to 44%
The influence of thermal contact between medium on the surface waves propagation in a prestressed thermoelastic layered half-space
Authors: Yu Levi G , Belyankova T I 
Published: September 2019

Abstract
In the framework of the linearized theory of the propagation of thermoelastic waves, a dynamic mixed coupled problem on the oscillations of an inhomogeneous medium under the action of a thermal load oscillating on its surface is considered. The medium is a thermoelastic prestressed layer rigidly coupled with a thermoelastic prestressed half-space. At the boundary of the medium, two types of thermal conditions are considered: ideal thermal contact and heat insulation. Using operational calculus methods, the boundary value problem with mixed thermal boundary conditions is reduced to an integral equation of the first kind with respect to the unknown distribution function of the heat flux in the contact zone. We studied the distribution of the poles of the Green’s function of a medium, taking into account the effect of initial strains and preheating. It is shown that thermal conditions at the interface between the medium have little effect on the distribution of the vertical displacement of the layer surface in the natural state. At the same time, the condition of thermal insulation between the layer and half-space allows to compensate for the effect of body pre-heating on the formation of the surface wave field.
Multisection heat exchangers for heat utilization of the waste gases from heat power plants
Authors: Yanvarev I A , Yu Grokhotov V 
Published: September 2019

Abstract
Improving the efficiency of fuel and energy resources in operating heat power plants is an important and relevant direction in the engineering development of various industries. A comprehensive solution to the problems arising as a result can be achieved, including the use of a step-by-step heat exchange process, which can be implemented in multisection heat exchangers for the utilization of the waste gases heat.
Tensile strength analysis of friction stir welded joints of AlMg6 obtained using additional heating of the parts
Authors: Chernykh I K , Vasil’ev E V , Sergeev V A , Popov P E 
Published: September 2019

Abstract
During friction stir welding a structure of a material in the welding zone undergoes significant changes: recrystallization occurs with the formation of three different zones: the weld nugget zone, thermomechanically affected zone and heat affected zone. It is known that a significant change in microstructure that observes on the boundaries between the above mentioned zones creates dangerous areas in the weld, and when testing specimens the fracture mostly occurs in these areas. In this study, the tensile strength analysis of friction stir welded joints of aluminum plates of AlMg6 of 3.85 mm thickness obtained using additional heating of the parts was conducted. The macrostructure of the welds was investigated; the fracture line of specimens is shown; the reasons that lead to decrease in durability of welds are identified. The tensile strength of welded joints amounted to 85-93% of the tensile strength of the base metal.