Elektromagnitnye Volny i Elektronnye Systemy

The effect of injection current on transient photocurrent is studied in the case of arbitrary light absorption in space-time electro-optical modulator in the presence of charge carrier trapping. Photocurrent oscillations caused by the generation of alternating space-charge regions in the form of domains that move from the collector to the emitter, are found. It is shown that the injection current stabilizes an electric field on the emitter.

Yu.I. Kuzmin

Electromagnetic Waves and Electronic Systems

Oscillations of photocurrent in the structure of a space-time electro-optical modulator in the presence of monopolar injection from illuminated contact

光照接触处单极注入存在时时空电光调制器结构中光电流的振荡

The modern stage of development of telecommunication networks is characterized by active improvement of routing algorithms in packet-switched networks taking into account the provision of the required quality of service. The need to transfer large amounts of information is due to the need to ensure the normal functioning of modern multimedia applications, in particular such as IP telephony, video and radio broadcasting, interactive distance learning, which determines the multiservice nature of traffic, which is heterogeneous, and its statistical properties in most cases are of a complex polymodal nature. Taking into account the fact that traditional Poisson models providing FIFO servicing of network traffic for solving modern telecommunication problems lead to overly optimistic results in terms of delays, there is a need to develop a new mathematical model of a unidirectional switch providing FIFO servicing of multiservice traffic with polymodal distribution taking into account the provision of the required quality of subscriber service and an algorithm for estimating its main parameters. Development of a mathematical model of a unidirectional switch FIFO-service of multiservice traffic with polymodal distribution taking into account the provision of the required quality of subscriber service and an algorithm for estimating its main parameters. A new mathematical model of a unidirectional switch implementing FIFO-service of multiservice traffic with polymodal distribution has been developed, allowing one to estimate the probabilities that packets arriving at the switch input will not be processed due to overflow of its buffer memory and exceeding the maximum packet processing time. The model takes into account the delays introduced by the channel and channel equipment during the distribution and processing of packets from the source to the switch in question. Recommendations for modeling traffic processing to ensure the specified accuracy of the results are presented.

A.Yu. Insarov

R.R. Fayzullin

V.I. Il’in

Unidirectional switch model for multiservice traffic with polymodal distribution

多服务流量多模态分布的单向开关模型

K.V. Sazonov

A.A. Makunin

Analysis of the emotional content of text messages with a mixed code

混合编码文本消息情感内容分析

B.I. Yakubovich

Fluctuations in physical systems

物理系统中的波动

Y.A. Kostychov

A.S. Yashchenko

S.V. Krivaltsevich

Possibility of increasing the reliability of determining the value of the wave propagation constant along the radiator of near-ground HF antennas

提高近地高频天线辐射器波传播常数值确定可靠性的可能性

Currently, modern networks LTE, Wi-Fi, 5GNR are combined into a single heterogeneous network, which leads to an increase in intra-system interference. According to the integrated optimization method, to distribute data flows in a heterogeneous network, taking into account the intra-system interference influence, the collective dynamic routing method is used. At the analysis stage of this method it is necessary to estimate the channel data rate in all valid routes. To obtain correct channel data rates estimates, it is necessary to reliably estimate the channel matrix. Today, the ray tracing model is widely used to estimate the channel matrix. The verification results of the using ray tracing model given in [1] show the need for additional research to increase the channel matrix estimates reliability. Therefore increasing the reliability of channel matrix transmission coefficients estimates by analyzing the influence of the number of rays taken into account is the actual task. The work analyzes the influence of the number of rays taken into account on the reliability of estimating the complex transmission coefficients of the channel matrix for the cases of the presence and absence of line of sight be-tween the transmitter and the receiver. Expressions are obtained to take into account the influence of diffracted, singly reflected and passed through an obstacle rays. A program has been developed to find all possible rays arriving at the receiver location point and determine their parameters based on a digital 3D map indicating the map objects materials. Using the developed program, it is shown that taking into account the influence of additional rays makes it possible to increase the channel matrix estimation reliability, and therefore, the modified ray tracing model can be used to estimate channel data rates when applying the collective dynamic routing method in heterogeneous net-works.

S.V. Kozlov

E.A. Spirina

E.A. Nemtsev

A.A. Spirina

Communication channel parameters estimation using a ray tracing model in heterogeneous networks

异构网络中基于射线追踪模型的通信信道参数估计

The paper presents the results of a study on the influence of user mobility patterns in the O-RAN (Open Radio Access Net-work) on the parameters of a multi-linear model. The considered multi-linear model is represented as three-dimensional tensors that describe the changes of received signal power or SINR (Signal-to-Interference-plus-Noise Ratio). Factor matrices after the CP (Canonycal Polyadic) decomposition are exploited to separate users by their mobility using the DBSCAN (Density-Based Spatial Clustering of Applications with Noise) algorithm. A model and a set of scenarios are developed for simulating the O-RAN segments and to study the influence of the user mobility on the parameters of the multi-linear model. Simulation results indicate that the number of users in groups with different mobility patterns does not affect the parameters of the multi-linear model and the performance of the DBSCAN algorithm. For the considered scenarios, the best classification results are achieved when the order of the multi-linear model equal to three. Moreover, it is revealed that the topology of a network segment effects on the order of a multi-linear model.

A.K. Gaysin

A.A. Korobkov

I.A. Safiullin

I.P. Ashaev

A.F. Nadeev

Investigation of the dependence of the multi-linear model parameters on the user mobility pattern in O-RAN in the context of user groups classification

在用户群体分类背景下，O-RAN中多线性模型参数对用户移动模式依赖性的研究

Today, in the era of transition to the information society, the issue of analysis and processing of scientific information is extremely acute. This is due to the fact that the use of results and processing directly and indirectly affect the country's strategy in the field of educational activities. Direct influence is manifested in the introduction of the results of scientific activity into the educational process in the form of educational material. At the same time, indirect influence involves a more complex mechanism, which was described by the authors earlier and has a more long-term effect due to the implementation of the effects of generational values that are formed at the age of 12–14 years under the influence of existing technological development, family values and the socio-cultural environment, which in turn forms patterns of behavior that affect the process of choosing and studying new information, developing new technical solutions, making key decisions, which directly influence the industrial potential of the country. Currently, there is a fairly large number of scientometric methods for studying scientific information, which, among other things, allow implementing in a limited form the idea of D. Price about the "invisible college", when in the course of analyzing scientific information it is possible to determine the scientific social structure consisting of universities, research institutes, scientific journals, conferences, scientists in individual fields of science. However, all methods use in one form or another formal analysis and a context-free approach to assessing citations, which does not allow for a qualitative assessment of the processing and transformation of information in the process of scientific activity, which is a necessary condition for the development of the country's industry. Creating an algorithm for classifying scientific information by generating prompts for a large language model to ensure contextual analysis of citations in scientific papers and classifying scientific information based on deep semantic analysis. Requirements have been formed for the selection of scientific information that provides the highest quality analysis results from the point of view of expert opinion. The presented algorithm for generating queries to a large language model facilities contextual analysis and classification of bibliographic references in scientific information. The proposed approach for clustering scientific information takes into account the multidisciplinary nature of research and ensures the continuity of research based on multidimensional bases. It is shown that the quality of contextual analysis of bibliographic references due to the developed algorithm has increased by 27% compared to using a large language model without this algorithm. Based on experimental studies, the possibility of predicting changes in the social sphere is shown. The algorithm for generating queries to a large language model is presented, facilities for contextual analysis and classification of bibliographic references in scientific information. The proposed approach for clustering scientific information takes into account the multidisciplinary nature of research and ensures the continuity of research based on linguistic multidimensional bases.

I.M. Lerner

A.Kh. Marinosyan

S.G. Grigoriev

A.R. Yusupov

M.A. Anikyeva

G.A. Garifullina

An approach to the formation of intellectual academic genealogy using large language models

利用大型语言模型构建学术谱系的方法

At the present stage of development of energy-efficient technologies – pulsed devices and systems for amplifying information signals and converting electrical energy, the problem of electromagnetic compatibility (EMC) of information and computing technology and radio-electronic equipment (REE) is becoming more and more acute. One of the most pressing EMC problems is caused by the presence of conducted electromagnetic interference (EMI) traveling along wires. This problem is eliminated by using EMI filters, which localize EMI at the place of its occurrence. Further development of functional REE (sensitivity, expansion of the frequency range by tens of thousands of times) requires the development of design theory, new design principles to meet new requirements for the EMI filters. The article discusses the development of EMI filter with overlapping frequency range 9 kHz – 100 MHz (eleven thousand times) with EMI attenuation of 50–60 dB on a domestic electronic component. Achieving this goal required new principles for designing EMI filter: development of new principles for the synthesis of structural-parametric electrical equivalent circuits of inductors and capacitors in EMI filter; study of the stability of the "filter-converter" system, caused by the negative real component of the complex input impedance of a pulsed voltage converter with negative feedback. A methodology for designing a broadband PDF with an overlap of the protected frequency range from EMI by eleven thousand times (9 kHz – 100 MHz) has been developed. The developed EMI filter with a frequency range of 9 kHz – 100 MHz is used in new radio navigation systems. The proposed methodology for designing EMI filters and methods for creating behavioral models of capacitors and inductors will be expanded to other groups of capacitors and inductors.

V.F. Dmitrikov

A.A. Vyalov

A.K. Nevolin

A.Yu. Petrochenko

D.V. Shushpanov

Design features of a high-frequency EMI filter in the frequency range 9 kHz – 100 MHz

9 kHz – 100 MHz频率范围内高频EMI滤波器的设计特点

出版信息	出版商: Izdatel'stvo Radiotekhnika，出版周期: ，期刊类型: journal，开源期刊: 否
基本数据	创刊年份: 2005，原创研究文献占比: ，自引率:， Gold OA占比:

Elektromagnitnye Volny i Elektronnye Systemy

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Oscillations of photocurrent in the structure of a space-time electro-optical modulator in the presence of monopolar injection from illuminated contact

Unidirectional switch model for multiservice traffic with polymodal distribution

Analysis of the emotional content of text messages with a mixed code

Fluctuations in physical systems

Possibility of increasing the reliability of determining the value of the wave propagation constant along the radiator of near-ground HF antennas

Unidirectional switch model for multiservice traffic with polymodal distribution

Communication channel parameters estimation using a ray tracing model in heterogeneous networks

Investigation of the dependence of the multi-linear model parameters on the user mobility pattern in O-RAN in the context of user groups classification

An approach to the formation of intellectual academic genealogy using large language models

Design features of a high-frequency EMI filter in the frequency range 9 kHz – 100 MHz