Vol 20, No 6-2 (2018)

The authors of the article present the results of experiments on the creation of oil sorbents from secondary polymers. Comparison of the physical and sorption properties of the obtained sorbents showed that the rubber crumb of the fine fraction and the composite obtained from the polymer fiber of PET bottles and the rubber crumb of the small fraction possess the best sorption properties. A flow chart for the production of sorption mats for collecting oil from the surface of water bodies based on the sorbents obtained is proposed.

The paper considers the influence of the nonlinearity of the stiffness characteristic of the rubber-metal pin joint of the tracks on the dynamic loading of the elements of a caterpillar drive. The results of the numerical study of the dynamic behavior of a track chain with rubber-metal hinges are presented.

The study describes the evolution of the stress strain state in an polarization-maintaining optical fiber of Panda-type in conditions of contact interaction between the fiber and the coil with a single-strand power winding and cyclic temperature change by means of mathematical modeling. The finite element method is used to construct a finite-dimensional discrete analog. Multivariant computational experiments were carried out in which the coil diameter and deviations of the cross-section geometry of the Panda-type fiber were varied. The dependences describing the evolution of the stress strain state in the fiber, the refraction index and birefringence in the light-conducting core were obtained. The influence of the geometry deviations of the cross section of the Panda-type fiber to optical characteristics were investigated. It was shown that the greater deviation of the geometry from the design values, leads the greater temperature change influence on its optical characteristic. It was found that the small diameter coils are characterized by nonlinear changes in the parameters under study at high temperatures, due to relaxation processes in the protective coating of the fiber.

The paper presents a technique for designing spatial loaded aerospace structures made of short-reinforced composite materials. The power circuit of design was obtained using topological optimization. An account of technological constraints imposed by the product manufacture by molding was done. The designing of injection molding equipment and the design refinement using parametric optimization is presented. The verification calculation of the stress-strain state was carried out in ANSYS Workbench coupled with Digimat CAE to take into account the anisotropy of the material properties in each grid element.

This article discusses the problem of creating an effective method for determining the deviations of the internal contour of cylindrical structures. The lack of data obtained in the process of controlling assemblies using templates does not allow one to fully evaluate the precise parameters of the product. In this paper, we developed and tested a method for determining the deviations of the internal contour of cylindrical structures with a measuring system based on a laser tracker. For data analysis, Spatial Analyzer and Excel software was used. Conclusions about the advantages of the method of determining the deviations of the laser tracker.

Enterprises engaged in operations with money or other property should develop rules and implement internal control in order to counter the legalization (laundering) of criminally obtained income and terrorism financing. Small non-credit financial enterprises experience difficulties in developing rules and implementing internal control in full, which leads to the financial stability degradation of the states and opens up the possibility of law violation. The paper objective is to increase the efficiency of internal control by developing an intelligent automated system that implements a precedent hybrid approach to decision support. With the proposed approach, I am looking for the solution for each new task by searching similar precedents represented by unified patterns in the knowledge base, then by obtaining via adapting solutions for the new task, and then hybridizing the solutions to get the best results and, at last, saving the new task solving pattern in the knowledge base. I developed the operation algorithms and system software using the proposed precedent approach. The system software consists of a web application for use in the branch network of enterprises and a desktop application for individual enterprise branches that do not have a stable channel of communication with the Internet. The system implementation increases the non-credit financial enterprises’ efficiency in terms of internal control by reducing the time and improving the quality of decision making, reducing the number of technical errors and the time to prepare documents.

The article deals with an alternatively approach to scientific programming, based on the conceptual-holistic methodology that combines the features of several programming paradigms. When solving mathematical modeling problems related to physical research in optics, the use of pure object-oriented languages, such as C# and Java is quite rare. Excepting performance questions, it is connected to the underdeveloped means of iteration procedure and access to elements of collections. Also it is connected to the lack of complete information about the concrete type in the universal declarations of methods and abstract data types in compile time. For elimination of these shortcomings in the article use of the generic concepts allowing specifying requirements to arguments of algorithms is offered. The ability to control execution preconditions based on syntax and semantic restrictions sets the required strategy of data processing. The concepts is widely known in the C ++ community and means the requirement specification to parameters of types in the predicative form. These requirements set rules of application of syntax constructions and give understanding of what types, literals, valid operations, and expressions must be associated with them. Article is intended for permanently the practicing experts using C ++, C# or Java in scientific work and will be interesting from the point to combining of many, already existing, concepts, methods and technologies of data processing.

The article presents the main design solutions for the information technology of interaction between scientists and creatively gifted schoolchildren in a virtual scientific and educational environment. The technology is implemented within the framework of the Concept of the Unified Regional System of Measures developed in the Samara Region to identify and develop creatively gifted young people in the field of science, technology and technology. The article describes in detail the roles and patterns of interaction of participants in the scientific and educational environment. The basic principles of the scientific and educational environment are formulated. In addition, some results of a three-year competition of research projects of students of educational organizations using information and communication technologies have been summed up. Analysis of the results of the competition showed the effectiveness of modern information and communication technologies.

The paper considers the problem of need for calibration of multispectral images of unmanned aerial vehicles. Proposed calibration method that takes into account the effect of shooting conditions on the reflectivity of surfaces. Described results of calculation of the vegetation index for the image calibrated using the described method and without it.

The mathematical model underlying the intelligent transport geographic information system “ITSGIS” is based on the principles of object-oriented design, description of the semantics of physical objects of different nature with their geolocation and interactions between them. In the presence of several divisions and workplaces - ITSGIS users, the use of a local network and the distributed nature of the system are almost inevitable, the remaining moments are determined depending on the territorial organization of the enterprise and the intensity of information exchange between geographically distributed divisions. In the ITSGIS environment, the problem of user interaction with different types of databases is solved by introducing the third layer - business logic rules-into ITSGIS. The imposition of business rules into a separate layer allowed to separate from specific implementations of a logical data structure - the rules of the admissibility of operations in ITSGIS. Logical control - is referential integrity-tracking actions with spatially coordinated data when changing or deleting records in the master data, and the synchronization of geographical and semantic data, control of semantic correctness of the input data with the control of visualization and location of geoobjects on the electronic map. The introduction of the business rules layer solves the problem of information interaction among distributed ITSGIS users. The three-layer ITSGIS architecture provides the logical integrity of a system that combines multiple databases and multiple applications. The functioning of the application server is regulated by the standard of visualization and dislocation of geoobjects on the relevant thematic layers of the ITSGIS electronic map. The main documents regulating the certification process of visualization and deployment geoobjects are Standards ITSGIS developed on the basis of state Standards of the Russian Federation, guidance for certification and surveillance imaging multitype geoobjects used an independent inspector to evaluate and monitor the quality of functioning ITSGIS. The documents collected standard protocols for assessing the functions of the quality system used in the survey of mass production of electronic maps with thematic layers. Each of THE ITSGIS Standards describes a complex predicate function, the performance of which is determined by a set of conditions of different nature. The constructed model Standards geoobjects ITSGIS, Standard ITSGIS quality functional and integrated deployment geoobjects, models of plug-in intelligent quality control of the production of thematic layers of electronic maps ITSGIS.

In the article from the position of the system analysis the existing methods of structural-parametric synthesis, mathematical modeling, optimal control of transport networks are investigated, the goals of ensuring the safety of the transport infrastructure with the positions of the optimal load of the transport network, especially in case of emergency situations, the requirements for the development of a mathematical model of the load of the transport network are determined. A large number of studies on the load of the transport network was carried out in the environment of intelligent transport geographic information system “ITSGIS” and was aimed at the development of algorithms for automatic detection of emergency situations and congestion. At the same time, various types of hardware such as sensors, cameras and radars were used in the intelligent transport geographic information system to collect the characteristics of traffic flows. When solving the problem of carrying out a system analysis of the load management of the transport network in the event of emergency situations and building a model of emergency situations, the decomposition of the subject area “Loading of the transport network” into classes of objects, the model of the subject area is developed; the models of transport infrastructure objects included in the subject area are developed, the attribute characteristics of objects are revealed; performed parameterization of the emergency situation, the classification of contingencies according to the types identified temporal characteristics and geofences direct impact on the transport network and the indirect impact on traffic flows. Model contingencies defined classes: Type, Time, Reasonablely. The type of emergency situation is characterized by its location, i.e. its coordinates on the electronic map, or the cause. Time of emergency is considered from various positions, such as time of occurrence, normative and actual time of elimination. Geofences of influence of an emergency situation are divided into zones of direct and indirect influence of an emergency situation on transport processes and objects of transport infrastructure. On the basis of the constructed models developed methods of management of loading of the transport network and analysis of emergency situations, including the collection and processing of raw data, the determination of emergency situations and their characteristics, the choice of the optimal response strategy, the performance of management functions.

The article discusses the algorithms for constructing the association rules Apriori and Eclat, which are used to analyze a data set containing information about the grocery purchases of users of the largest US retailer Walmart. In the course of work, it is possible to obtain trivial and useful rules that can be taken into account when forming store departments and arranging goods in such a way as to increase consumer activity. The resulting graphs allow you to visually evaluate the constructed rules and make the most accurate predictions. In addition, the article compares two algorithms for finding associative rules for such parameters as changing the value of the support level and submitting a different amount of data to the input.

The article discusses a mathematical model of a synchronous (key) detector for the selection of a useful signal generated by ac bridge circuits, in particular, an eddy current bridge transducer (VTP). The text obtained expressions connecting the output voltage of the detector with the amplitude and phase of the input voltage.

The analysis of the regulatory and legal framework regulating the collection and exchange of information in a unified state system for the prevention and elimination of emergency situations (RSES) has been carried out. On the example of the Udmurt territorial subsystem, the main shortcomings in the process of collecting information carried out by the bodies of day-to-day management of the RSES were considered. The scheme and functional models of the process of passing information about emergencies are described and described. The main reasons for the untimeliness, incompleteness and unreliability of the information provided are revealed. The proposals were developed to increase the efficiency of the passage and quality of information between the participants in the information exchange in the bodies of day-to-day management of the RSES.