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The modern mining industry has huge innovative potential for the introduction and development of digital revolution products. It has always been the most important industry of modelling development, as many operations and processes here are directly empirical and provide a large amount of data for quantitative analysis, which is now well suited to the use of digital intelligent technologies. With the development of digital technologies, effective integrated modeling techniques and the introduction of new process management, knowledge and data analysis tools are needed. Analytical models here are primarily designed to symbolize object properties in dynamics. Intelligent models and solutions based on the use of information technologies and methods of working with big data were becoming most popular, and the processes of integrated monitoring, personalization, risk management, search and generation of solutions, web orientation of programs and technologies and formation of network organizational structures of management were becoming particularly important. Mining enterprises have specific risks: mining and geological risks, risks of loss of market share and investment attractiveness due to biased valuation of useful fossil reserves, risks related to cybersecurity and innovation. Enterprises need to implement new technologies in a comprehensive manner, and information innovation is becoming very important in the face of a lack of financial resources. Expert systems, fuzzy logic, neural networks and genetic algorithms are the most relevant applications in international practice of geoinformation resource management, which largely determines the practical use of artificial intelligence methods and tools in interaction with pound-based management solutions. Modern analytical expertise includes the integration of process management systems, in particular those that are different, which is based on the development of a large number of integration technologies and techniques that apply different data models and are carried out through different procedures. The study examines the development of analytical models based on intelligent technologies, which are now increasingly used in various areas of the mining industry.
This work is devoted to the study of applicability of modern methods of machine learning to the task of automatic classification of scientific articles and abstracts. For this purpose, the study of such models of machine learning as artificial neural networks, random forest, logistic regression, and support vector machine (with taking into account such a feature of scientific texts as a large number of terms specific for various categories) was carried out. Separately, the stages of data collection and extraction of text characteristics are considered. The results of research are used in development of a decision support system for assignment of scientific texts to the code of the department or abstract journal of All-Russian Institute of Scientific and Technical Information of Russian Academy of Sciences.
The paper reviews the current situation of the Augmented Reality and Internet of Things markets. The implementing possibilities of AR for Big Data visualization from IoT devices are considered in this paper. The review and the analysis of methods, tools, products and data system of the visualization are presented. The paper provides an overview of the programs and devices of Augmented Reality, and an overview of development environments. The paper presents the existing classifications of computerized data visualization tools and proposes new classification, which takes into account interactive visualization, the purpose of the tool, the type of software product, the availability of ready-made templates, and other characteristics. The article proposes the architecture of the system for collecting data from IoT endpoint devices based on the Heltec modules. Experiments based on the developed experimental stand were carried out with Heltec devices of both versions to determine the number of losses with increasing distance between the sending device and the receiving device. The results of measuring the power consumption of these devices are presented in two modes: in standby mode and when sending a message to the Heltec endpoint device and in standby mode and when receiving a message for the base station. These studies were conducted using various data transfer protocols (LoRa, Wi-Fi and Bluetooth). The paper presents the result of the development of a digital twin of a university building and the development of augmented reality software for receiving data from real-time data collection devices.
A formal method is proposed for constructing a macromodel of a linear equivalent electrical circuit of a communication satellite antenna. The macromodel can contain as many phase variables as the antenna designer wants. The macromodel maintains a simple dependence of its output characteristics on the design-technological variable parameters of the antenna model. The use of this approach allows reducing the complexity of calculations by several orders of magnitude
In this work self-heating effect in SOI MOSFETs with various configuration of buried oxide was investigated using TCAD modeling. The basically electro-thermal transport model built-in to Sentaurus Synopsys tool was complemented by the set of new models for the temperature-dependent physical parameters: thermal conductivities λSi(T), λSiO2(T); oxide and trapped charge densities Nox(T), Nit(T) and others taking into account the special thermal effects that appear in modern deep submicron and nano-scale devices.
Abstract—We have performed computer simulations and experimental studies of characteristics of a standard analog device—the heterodyne employing a printed circuit board (PCB) made from a composite dielectric with a controlled dark conductivity. Simulation results show that an increased conductivity of the PCB smaller than 2 × 10^−7 Ohm^−1 · m^−1 has almost no effect on the operating characteristics of a heterodyne operating in the frequency range of 9–37 MHz, which are in a good agreement with the experimental data. Such PCBs are expected to exclude electrostatic discharges in spacecraft electronic devices otherwise occurring in them due to their internal charging by the ambient space plasma.
The primary purpose of this paper is to provide an overview of existing education solutions for IoT and develop proposals for their improvement. The study draws analysis of current conditions of the educational IoT sphere, a comparative analysis of educational products used for teaching of undergraduate students. With that the article describes the architecture of our own software and hardware platform for learning IOT. Moreover, this paper reviews methods and technical instruments employed to design software and hardware appliances.
This article describes a technical solution of the system generator of configuration files of development boards “Marsohod 2”, “Marsohod 2bis”, “Marsohod 3”, “Marsohod 3bis” for Quartus Prime software. The solution includes a web interface for the system generator, generation of configuration files, introduction of additional modules into the generated project, such as a frequency divider, Uart8 (RS-232), a module for preventing of contact bounce, and several types of simplest MIPS processor cores. This technical solution improves the convenience and speed of FPGA development, as well as reduces its entry threshold which can be significant for starting developers.
In order to assess the level of electronic means reliability, it is necessary to have a methodology for analyzing
the results of calculating its reliability indicators, such as the probability of failure-free operation or mean time between
failures, which allows to evaluate which of the parameters most strongly affects the final value of the failure rate of electronic component particular type. As a result of analyzing the reliability of electronic mean all-levels components, the engineer should obtain the values of the reliability indicators, the boundary values of the controlled parameters, and also give recommendations on certain changes necessary to improve the reliability, thereby implementing the reliability management methodology. This technique, in contrast to the already known ones, will allow analyzing the calculated values of the indicators and using the relative sensitivity function to determine the contribution made by specific parameters: temperature, element ratings, their operating voltage, current, power, tolerance level, while previously contribution was estimated by the numerical value of a separate correction factor. Application
of the developed methodology for analyzing the results of calculating the reliability of electronic means allows to specify the recommendations for changing parameters in order to improve the reliability of the elements that make up the product in question.
At the present, the actual task is using 3D printers for the manufacture of certain objects with a given level of price / quality ratio. In many cases, it is economically feasible to use a low cost 3D printer. Therefore, it is necessary to have models that predict and classify the printing quality of such printers. The work has involved the development and assembly of a low cost 3D printer. For this purpose, the creation of geometric models of the component parts and the printer itself was carried out, and engineering calculations and optimization of the received designs were performed. It has been developed a printer control system. An experiment was conducted to produce cubes with different printing parameters on such printer. Based on regression analysis, linear and logistic regressions were constructed. Linear regression will allow to assess the quality level of the result depending on the printing parameters, and the logistic regression will allow to classify and predict the probability of manufacturing objects with a given quality level. The influence of each of the print parameters on the quality and result of the classification was analyzed.
This work includes a review of MIPS architecture processor cores and a review of network topology consisting of routers. It was demonstrated by realization of 2 multiprocessor systems developed on the basis of mesh topology using modified schoolMIPS soft-processor cores, in which architecture additional blocks and instructions were added, and routers with XY routing. As a result, the obtained NoC performance is up to 1.87 Gbit/s (4 processor cores), and up to 1.54 Gbit/s (10 processor cores). The extended processor core schoolMIPS consumes 452 ALMs and 1692 bits of memory; NoC of 4 processor cores takes 2223 ALMs and 9136 bits of memory; NoC of 10 processor cores – 5696 ALMs and 22840 bits of memory. The obtained results suggest that there is a possibility of NoC development with the number of nodes up to 200 nodes on Stratix IV GX EP4SGX230 (DE4).
This work is devoted to the study of communication subsystem of networks-on-chip (NoCs) development with an emphasis on their topologies. The main characteristics of NoC topologies and the routing problem in NoCs with various topologies are considered. It is proposed to use two‑dimensional circulant topologies for NoC design, since they have significantly better characteristics than most common mesh and torus topologies, and, in contrast to many other approaches to improving topologies, have a regular structure. The emphasis is on using ring circulants which although in some cases have somewhat worse characteristics than the optimal circulants, compensate by one-length first generatrix in such graphs that greatly facilitate routing in them. The paper considers three different approaches to routing in NoCs with ring circulant topology: Table routing, Clockwise routing, and Adaptive routing. The algorithms of routing are proposed, the results of synthesis of routers, based on them, are presented, and the cost of chip resources for the implementation of such communication subsystems in NoCs is estimated.
Abstract— Applicants often do not choose technical education because of the difficulty of this sphere or the lack of engineering knowledge and real engineering practices that is so important. This issue opens up a new development space for educational software for the beginners and non-professional users. Such problem as the difficulty of choosing and obtaining an engineering education is considered. This paper presents an investigation of the electrical circuits and development of a program module for the schemes’ analysis that could be easily embedded in educational establishments. Existing technics for analyzing electrical schemes were observed and the most effective one was chosen. The main goal was reached by using the WPF technology of .NET Framework. Altogether, the research provides a simple instrument for circuit analysis that gives some helpful information about electricity and the circuitry. It automates verification of practical tasks and exercises made by students and allows to refuse the use of complex electrical stands. Furthermore, the developed application can be integrated into the educational system as a tool for teaching staff and development of popularity for technical specializations.
The paper reviewed and analyzed protocols, technologies for transferring and presenting IoT data, developed a model of a heterogeneous IoT network for hard-to-reach areas, proposed a method to improve the efficiency of data transfer in a heterogeneous IoT network. As a result of the work, a model of using the Internet of Things technology (LPWAN) in hard-to-reach areas was developed, information presentation methods were identified that allow solving the problem of collecting information from remote sensors located in the absence of traditional communication channels and a practical check of the results obtained. The paper uses simulation modeling to study the applicability of different methods of presenting information in the case of transmitting IoT data over low-speed satellite communications channels. The method proposed in the paper allowed the use of the Internet of things technology in remote areas using the SBD satellite short message service. The proposed method allowed reducing the volume and number of SBD messages during data transmission via low-speed satellite communication channels, which made it possible to reduce the cost of communication data transmission by 4.82 times.
The most competitive in the current global market remains products of extractive industries, which determines the increased attention to the problems of functioning of these industries and clarify the terms of their most sustainable development. Unique mineral-raw material complex of Russia can ensure the continued economic development of the state only on condition of effective activity of the largest mining enterprises. Important to adaptation of enterprises to the changing external environment that places new demands on planning, on the basis of the calculated predictive values, and creates the possibility of increasing the competitiveness of the organization. Integrated quality management system in the modern world represent the most important area of functioning and development of any production, great extent determine the competitiveness of the enterprise and prospects of its activities. The need for effective construction of a system of methods, tools, principles and tools of collection, analysis, evaluation, presentation and use of data evaluating the effectiveness and stability of functioning and directions of improving the organization of mining enterprise on the basis of the technical, economic, social and environmental issues in the framework of the technical and economic audit.
Computer simulations of electrostatic discharges (ESD) effect on high-power MOSFET-transistors with built-in
protection have been carried out. It was found that the transistors with low gate-source capacitance are more sensitive to the ESD effect.The dependence between printed circuit board (PCB)
capacity, causing breakdown of MOSFET-transistor gate dielectric, and ESD voltage was established.
It is shown that for transistor haying low gate-source capacitance, the existence of the built-in protection does not prevent gate dielectric breakdown at electrostatic discharges. It is recommended to provide external ESD protection for high-power MOSFET-transistors with built-in protection having low gate-source capacitance, for example, having turned on the ESD protection diode in the electric circuit.
Constant growth of spacecraft operating life requirements leads to creating equipment which fits these requirements. From this point of view, specifically durability prediction allows to evaluate the potential of creating equipment with a long operating life. On early stages of equipment’s development analytical methods of durability prediction are used. Obviously, the more precise the estimation is, the more likely that the practical test will confirm the durability predictions. Therefore, improving the engineering techniques of the durability prediction is a relevant problem.
The objective of this research is to improve the quality of design work by enhancing the engineering techniques of the durability prediction, which raise the authenticity of the evaluations.
Life of the equipment are calculated using the statistical modelling method (Monte-Carlo method). This method takes into consideration probabilistic characteristics of constituent elements’ life.
As a result, the problem of predicting operating life of electronic equipment using the reference data on early stages of development is solved. An analysis of standardized method of durability prediction was performed which revealed existing limitations for using this method when predicting operating life of electronic equipment. An alternate, statistical method of predicting operating life of electronic equipment was suggested and a software implementation was created. Developed software was tested and verified. Analytical experiments were performed to show the authenticity of the suggested method and to compare it to the standardized one.
Thus, results of the performed research show that the standardized method is applicable only for calculating the minimum operating time. Also, it was concluded that the truncation parameter of element’s life distribution, variation coefficient of life and some specific qualities of dependability prediction scheme have to be taken into consideration when predicting durability of electronic equipment.
The aim of research is determine the feasibility of using the methodology for calculating availability and mean delay time to demand fulfilling for spare part by local package of electronic means (EM) with a compound structure of spare parts, tools and accessories(SPTA) kit. Methodology is based on the usage of the analytical model “EM – SPTA kit” with an assessment of the failure level. The main advantages of this technique are possibility to split the main structure of the spare parts system to set of simple, possibility of calculating spare parts sets for several types of replenishment strategies, the simplicity of verification the model for assessing the availability rate and the average delay in satisfying a request for a spare part. Possibility of calculating spare parts sets for several types of replenishment strategies. Simultaneously the technique has a significant drawback, such as methodical technique gives an approximate value of the sufficiency indicators with an calculation error. At the conclusion were proved the ability to use electronic methods for calculating the availability`s rate and the average latency in satisfying the request for the spare part of the spare parts kit system for some replenishment strategies, which also allows to calculate the availability rate for the “EM- SPTA system” model, which is proved to be possible for modern structures of the spare parts system.
New SOS MOSFET design with the presence of high-resistance undoped silicon of intrinsic conductivity in the channel
region near the source was proposed. 0.75 μm SOS MOSFET with the use of an "insertion" makes it possible to obtain
the transistor with characteristics corresponding to a transistor with 0.5 μm topological channel length. This allows the
factories to produce new competitive products without significant capital expenditures for the modernization of
The disadvantages of the traditional method of calculating
spare parts, tools and accessories package (SPTA) are considered. A
multi-criteria methodology for calculating SPTA package has been developed
for the simultaneous use of several criteria, such as weight, size or
cost. Based on the convolution method, which allows to reduce the multicriterial
task to a scalar one. To check the eectiveness of the developed
method, SPTA package for a mobile communications vehicle was calculated
using the current one-parameter and developed multi-parameter
methods. The weight and volume of the required SPTA package was
used as limitations. Based on the results obtained, an analysis of the
developed method was carried out.
Traveling wave tubes are actively used in various radio transmitting devices. However, the analysis of modern literature sources showed that there are no mathematical models that allow to take into account the influence of technical parameters of traveling wave tubes on the failure rate, and, as a consequence, on the time to failure and resource.