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• DISCRETE-ANALOGUE FILTER OF THE SECOND ORDER ON SWITCHED CAPACITORS WITH TUNING OF POLE FREQUENCY BY DIGITAL POTENTIOMETER

  D.Y. Denisenko , N.N. Prokopenko , Y.I. Ivanov , D.V. Kuznetsov

  179-189

  2025-11-10

  Abstract ▼

  A discrete-analogue filter of the second order on two frequency-switching capacitors is developed and investigated. The proposed circuit contains two inputs (In_LPF_HPF, In_BPF_NPF) and four outputs (Out_LPF, Out_BPF, Out_HPF, Out_NPF). The filter type (numerator of the transfer function) is determined by connecting a signal source to the corresponding input of the circuit and taking a signal from the corresponding output. The pole attenuation depends on the resistance of a single resistor R5, which does not affect the other parameters. Therefore, the pole attenuation can be tuned using this resistor. To set the passband gain at a given level, it is appropriate to use resistor R1 in the LPF and HPF, and resistor R2 for the BPF and NPF. Changing these resistors will not cause changes in other parameters of the filter circuit. It is established that the pole frequency depends on the resistance of the resistor R8 or digital potentiometer Kdp (Kf), the transmission coefficient of which can be changed by changing the binary digital code Kf, fed to its control inputs, and the other parameters of the filter link do not depend on them, so by changing the resistance of this resistor or the transmission coefficient of the digital potentiometer the pole frequency can be tuned in a wide range while preserving other parameters. Computer modelling of the investigated discrete-analogue filter is performed in Micro-Cap environment. The sequences of pulses controlling electronic keys are given. Graphs of output voltages at the circuit outputs (Out_LPF, Out_BPF, Out_HPF, Out_NPF) are shown. The application of a digital potentiometer in the filter circuit is extremely promising in the construction of adaptive signal processing systems.

• MODIFIED DISTRIBUTED DATA PROCESSING ARCHITECTURE FOR GEOINFORMATION SYSTEMS

  M.Y. Polenov, D.A. Ivanov

  2021-02-13

  Abstract ▼

  The paper proposes a modified distributed data processing architecture based on the clientserver
  model, as one of the options for implementing a software application of a geographic information
  system. The review of existing geographic information systems and their classification
  from the point of view of architecture demonstrated the prospect of using a distributed architecture.
  However, systems developed on the basis of a traditional distributed architecture face problems
  displaying processed 3-dimensional data in real time on computing devices with low performance.
  In this regard, the purpose of this work is to develop and study a modified architecture of
  geographic information systems, which allows to reduce the requirements for computing devices of
  clients. The relevance of the research topic lies in the fact that currently there are devices that can
  support only thin clients, which often have small functionality and are not able to solve heavy
  computing tasks. The article discusses the features of the structural and software implementation
  of a geographic information system based on the traditional architecture and the proposed modified
  distributed architecture. The results of experiments carried out on two developed software
  applications with different architectures are presented. The software implementation of the modified
  architecture and the results of experiments have shown the feasibility of its application for
  geographic information system systems on user computing devices with low performance.
  The proposed architecture can be used in other distributed systems as well. Especially in those
  where the task is to display three-dimensional information on thin clients.

• DEVELOPMENT OF INTELLIGENT INTEGRATED SYSTEM FOR "SMART" AGRICULTURAL PRODUCTION

  Z.V. Nagoev, V. М. Shuganov, А.U. Zammoev, К. C. Bzhikhatlov, Z.Z. Ivanov

  2022-04-21

  Abstract ▼

  The production of agricultural goods is currently associated with the use of digital technologies,
  elements of precision farming, automation and robotization of agriculture. These technologies
  make it possible to carry out continuous monitoring, carry out timely processing, improve the
  efficiency of production and use of resources. The need for the integrated use of digital technologies
  and artificial intelligence and the creation of intelligent integrated systems for agricultural
  production is noted. Studies show that IT-technologies are actively used in field farming when
  growing grain crops. The main crop in the production of breeding, seed and commercial grain in
  the Kabardino-Balkarian Republic is corn, so it is assumed that the intelligent system of the "smart
  field" should be developed initially for this particular crop, and then, with some modifications,
  used for the production of any crop products – other types of grain, vegetables, fruits, grapes and
  gourds. It allows you to reduce human participation at some stages of production by automating
  the process and controlling it through various "smart" devices. The operation of the "smart field"
  system is based on the use of a variety of sensors, including those installed on mobile equipment
  (ground and air manned and unmanned vehicles, space satellites) and portable portable devices to
  obtain operational data on the state of fields and crops. This allows: – analyze the readiness of
  agricultural land for sowing, monitor the progress of plant vegetation in order to effectively and
  efficiently plan agrotechnical measures (chemical protection against pests and diseases, fertilizing,
  irrigation, etc.); – predict production efficiency indicators (total gross harvest, yield per hectare), as well as timely identify production risks (appearance of pests, plant diseases, soil salinity,
  etc.). – make effective decisions on managing the use of resources of agricultural enterprises. With
  the use of "smart" devices, it became possible to introduce the so-called. "precision farming" to
  manage crop productivity, taking into account changes in the plant habitat. Ultimately, this makes
  it possible to solve two main tasks of agricultural producers - increasing yields and reducing
  costs. The authors have developed the concept of an intelligent integrated system "Smart Field" for
  the production of corn grain using advanced robotic systems and complexes. The architecture of
  the "Smart Field" system for the production of seed and commercial corn is presented, which can
  be adapted with minor modifications for the production of other crop products.

• TECHNOLOGICAL SOLUTION FOR FORMING A TRUST INFRASTRUCTURE IN THE DIGITAL RUBLE SECURITY SYSTEM

  А.V. Ivanov , А.V. Tsaregorodtsev , М.V. Valeev

  233-245

  2025-07-24

  Abstract ▼

  The relevance of the article is due to the digital transformation of the Russian economy, the most important direction of which is the development and implementation of digital ruble instruments in the credit and financial sector. In this regard, the national system should be based on the information technology infrastructure of trust in the digital ruble security system. The main functional properties of such a trust infrastructure include identification and authentication mechanisms, secure financial transactions based on protecting the integrity and confidentiality of data of participants and users of the digital ruble platform. In addition to the technological readiness of the trust infrastructure, it is necessary to build public trust in the digital ruble. The above circumstances determined the importance and necessity of developing a technological solution for the formation of a trust infrastructure in the digital ruble security system. In the course of the study, the following tasks were solved: a theoretical interpretation and empirical operationalization of the basic concepts of the digital ruble trust infrastructure were carried out; its organizational and technological prerequisites were investigated; the structural elements of the basic and role models of the digital ruble infrastructure were clarified; the analysis of encryption and tokenization methods of API was carried out, and a technological solution was formulated to ensure the security of the digital ruble trust infrastructure. Based on the results of the study, a set of measures aimed at the security of access to the digital ruble platform for participants and users via secure channels is proposed; the security of access for credit institutions based on two-factor authentication, as well as the security of the privacy of individuals and legal entities on the trust infrastructure in the digital ruble security system. Of practical importance is the list of works related to the deployment of Certification Authorities, information security tools and cryptographic information protection tools, integration with a unified information identification and authentication system and a fast payment system and their implementation in the general digital ruble system.

• CLASSIFICATION OF PROCESSING NODES IN BIG DATA SYSTEMS ACCORDING TO THE ZERO TRUST APPROACH

  М.А. Poltavtseva , D. V. Ivanov

  55-62

  2025-07-24

  Abstract ▼

  Data cybersecurity is one of the most important factors for the successful implementation of the national project ‘Data Economy and Digital Transformation of the State’. The challenges of building secure big data systems lie in their heterogeneous nature, large number of heterogeneous tools, high connectivity and high trust between distributed components. Reducing the internal trust and reducing the attack surface according to the zero-trust approach is necessary to increase the security of such systems with the least impact on their performance. The aim of the paper is to create a method for dynamic classification of nodes and data processing components in heterogeneous big data systems based on the application of different approaches to trust reduction with respect to the objects realising the information processing process. The paper considers the zero trust approach as applied to the class of systems under study, as well as the task of extended implementation of the principle of minimum privilege to reduce the attack surface. The authors present a classification of nodes - handlers based on their operations with data, unified according to the previously developed conceptual data model. A comparison of nodes and security methods applied to them based on the need for access to semantics and data components to perform operations is proposed. Based on this classification, a method of dynamic node type determination during system operation is developed for situations of changing component composition of a big data processing system, typical for multi-component distributed highly loaded systems. The results of the work are a part of the complex consistency approach to the construction of secure big data processing systems.

• A FAMILY OF SECOND-ORDER ACTIVE RC FILTERS (LPF, HPF, BPF) WITH INDEPENDENT ADJUSTMENT OF THE MAIN PARAMETERS

  D.Y. Denisenko, Y.I. Ivanov, N.N. Prokopenko

  2023-02-27

  Abstract ▼

  A bank of circuit design solutions for active RC filters of the second order is considered - a
  low-pass filter, a high-pass filter and band-pass filters, in which independent tuning of the main
  parameters - the pole frequency, the quality factor of the pole and the transmission coefficient is
  provided. From these positions, the requirements for three special transfer functions of a multipole
  frequency-setting RC circuit, which contains two resistors and two capacitors, are formulated.
  By choosing the coefficients of the numerator of the first transfer function, the type of the required
  filter (LPF, HPF, BPF) is implemented. The coefficients of the second transfer function are chosen
  so that they affect only the frequency of the pole. It should be noted that, depending on the set of
  coefficients of the transfer function numerator polynomial, the developed circuits have the property
  of lowering the pole frequency or increasing the pole frequency. In this case, the choice of parameters
  of the third transfer function provides the necessary attenuation of the pole. Using the
  The introduction describes a generalized architecture of second-order active RC filters, which
  allows implementing an algorithm for step-by-step tuning of the main parameters and can be used
  as the basis for the synthesis of many other modifications of active RC filters. For correct independent
  adjustment, the following sequence must be observed: the frequency of the pole, the second
  stage is the adjustment of the quality factor of the pole, and the third stage is the scaling
  factor. The stages of synthesis of this class of active RC filters are considered, the coefficients of
  the transfer functions of the presented circuits of 12 band-pass filters, a high-pass filter and a lowpass
  filter, confirmed by 14 patents of the Russian Federation, are given.