bluuebunny/crossref_metadata_2025 huggingface dataset:
Little-known Facts about the Activities of Consul A. T. Belchenko in Yingkou
Authors:   Institute of Russian History of the Russian Academy of Sciences, Sharonova Victoria G. ,   St. Petersburg State University
Published: January 2024

The article is devoted to the activities of the Russian Imperial Consulate in Yingkou (Niuzhuang) in the period from 1899 to 1909. Promoting Russian interests in South Manchuria, Russia paid great attention to the acquisition of real estate in this open Chinese port on the banks of the Liaohe River. At the initial stage, one of the main issues of the foreign mission was to assist in the acquisition of land for the construction of the Russian concession, as well as in the construction of the Yingkou station of the Yingkou — Dashiqiao branch of the CER. During the period of the Provisional Russian Administration, the building of the Russian Imperial Consulate, a doctor’s house and a bacteriological station were built here, the construction of the Mayor’s House began, and at the same time land plots were acquired for various household needs. The successful expansion of Russia in this region was disrupted by the Russian-Japanese War (1904–1905) and its results. Starting from the end of July 1904 to the end of November 1905, only one Russian citizen lived in Yingkou. The Russian Imperial Consulate which was reopened in December 1905 actively dealt with the issues of returning consular real estates and private property of its citizens. The Japanese military authorities, who were in charge of Yingkou until November 23, 1906, interfered in every possible way with this process. After the return of the city to the Chinese authorities, the Russian buildings were occupied by Chinese officials. However, thanks to the professional and well-coordinated actions of Russian diplomats in China and Japan, in particular the employees of the consulate in Yingkou A. T. Belchenko, V. K. Nikitin, Ambassador to Japan Y. (G.) P. Bakhmetev, delegate to China D. D. Pokotilov, the Russian consular property in Yingkou was returned to its rightful owners. Of course, the main role in this complex matter was played by Consul A. T. Belchenko, who, after solving the tasks assigned to him in Yingkou, was transferred to the consulate in Fuzhou. The choice of the Ministry of Foreign Affairs was determined by the high assessment of his diplomatic service.
Peculiarities of the Arabic Language Processing: Morphological Modeling
Authors:   St. Petersburg State University, Bernikova Olga A. , Kizhaeva Natalia A. ,   St. Petersburg State University
Published: January 2024

The paper deals with the features of morphological modeling of the Arabic language based on the definition of the specifics of its formalization. Morphological modeling is one of the key stages of automatic text analysis and includes tools for building a word form to a stem, root, definition of a part of speech, automatic construction (generation) of a given word form, etc. The objectives of the study are interdisciplinary in nature and include both the theoretical aspects of studying the features of the Arabic language, which are most relevant for its automatic processing, and the study of existing morphological analyzers and determining the specifics of their work. The practical part is based on testing the CAMeL TOOLS, one of the advantages of which is its comprehensive nature, which allows both preprocessing of text and solving applied problems, including sentiment analysis. The criteria for selecting examples for testing took into account the features of the Arabic language, which are difficult for its formalization (segmentation of functional words with continuous spelling, morphological and lexical homonymy, etc.). The variability of the generalized concept of "the Arabic language" is taken into account, which combines classical Arabic, Modern Standard Arabic and modern Arabic dialects. Testing tools for morphological modeling allows us to draw conclusions about the need to improve the terminological apparatus, the variability of which is noted in the description of word forms. Such kind of variation (divergence from the concepts accepted in general linguistics) potentially leads to a distortion of the results of lexico-semantic analysis. During the analysis, some gaps were noted related to the definition of part-of-speech belonging, the description of word forms, etc. The results of the study are relevant both for linguistic research and for improving the development of software applications aimed at processing the Arabic text.
The Peculiarities of Defining Culturally Specific Uzbek Names in Associative Dictionaries
Authors:   International Islamic Academy of Uzbekistan, Lutfullaeva Durdona E. , Yuldashev Akmal G. ,   Uzbek State World Languages University
Published: January 2024

This article deals with the discretion of associative features of names of culturally specific units in the Uzbek language. Also, this article highlights the issue of their classification. The method of studying the associated experience of native Uzbek speakers (L1 users) with the names of cultural units revealed the peculiarities of the emergence of the names of cultural units in the Uzbek language, as well as their nominative expression in associative dictionaries. The names of cultural units in the Uzbek language are different according to different topics. They can be classified as names of national rituals, customs, and traditions, national food, national haberdashery names, names of national cloth, national musical instruments, national songs, national dances, national holidays, national architecture, architect devices (or material), national games, national jewelry, make-up units, local organizations names, etc. The range of the usage of these names is different in a literary language. In this article, a special attention is given to survey how such names are presented in the associative dictionaries. The results of the analysis of materials on associative experiences related to such names show that not only linguistic factors, but extra-linguistic sources also can cause the associations. Specifically, the human factor is studied in the cognition of the names of culture units by Uzbek language native speakers. The issue of the comparison and contrast of other dictionaries with the Uzbek associative dictionary was compiled for the first time.
Ways of Conveying the Aesthetic Value of Tang Poetry in Russian Translations: A Case Study of Three Translations of Li Bai’s Poem “Thoughts on a Quiet Night”
Authors:   Zhengzhou University, Gu Junling , Zhang Qian ,   Hebi Polytechnic
Published: January 2024

Russian and Chinese languages belong to different language families, which makes it difficult to translate from one language to the other. The translation of one poetic language into another without making any changes is an especially difficult task, which is why conveying the aesthetic value of the original poem becomes the embodiment of an ideal adequate translation. The aesthetic values of Tang poetry lie in the integration of sound, thought form and the poetic world, that is, in the beauty of rhythm, the accuracy of the line and the expression of feelings depicted in the text. Rhythm, rhyme and poetic dimension belong to the form of poetry; the meaning of words, sentences and text together form the meaning of poetry; and the picture of life depicted in the text makes up the poetic world. If the Russian translation of Tang poetry can achieve conformity of form, equivalence of meaning and consistency of the poetic world with the original poetry, then it will be able to realize the aesthetic value of the original poetry and will relate to the ideal complete translation of poetry. The poem “Thought on a Quiet Night” is one of Li Bai’s masterpieces and it is included in Chinese language textbooks for elementary school. Due to the high aesthetic value of this poem, it has become a compulsory poem for Chinese elementary school students to study. To date, there are eight translations of this poem in Russia. This article mainly considers the translations by V. A. Alekseev, L. N. Menshikov, and V. F. Pereleshin. Through the comparative analysis on these three versions about the “Thoughts on a Quiet Night”, it shows that different translators with different aesthetic aspirations may produce disparate translation.
Five Journeys to North-Eastern China by Inoue Yasushi (1977–1980): Ancient Towns of the Great Silk Road in Retrospect
Authors:   St. Petersburg State University, Malashevskaya Mariia N.
Published: January 2024

Japan-China cultural ties in the late 1970s and early 1980s received a powerful impetus for development against the background of deepening interstate relations in 1970s. In this period, it had begun the turn of Chinese foreign policy towards increasing ties with market economy countries. Traditionally, cultural transfer from China to Japan was a mainstream in the interrelations of the two countries, but during 20th century political relations and cultural dialogue experienced a series of dramatic changes. After the end of World War II, despite ideological contradictions, cultural contacts between China and Japan expanded steadily. This article aims to study the travels of prominent and award-winning Japanese novelist Inoue Yasushi to northwest China in 1977–1980 as an attempt by Japan to expand its participation in Asian affairs and to consider in detail the multi-ethnic and multicultural China. To view and understand real China. The main source of the analysis and reconstruction of the travel route is a travelogue “My travel notes to Western Regions” (Watashi no seiki kiko:, in 2 vols) published in 1983. This study summarizes information about Inoue Yasushi’s travels to the Chinese part of Turkestan, clarifies the gradual deepening of cultural dialogue between Japan and China and examines the images of the ancient cities of the Great Silk Road, which the writer, known for his loyalty to China, created through a nostalgic “view into the past” in order to explain the cultural unity and specifics of the region as part of China.
Investigation and Preservation of the Palmyrian Historical and Cultural Heritage by Russian and European Researchers in the 17th–21st Centuries
Authors:   St. Petersburg State University, Akhmatshina Enesh K. , Gerasimov Igor V. ,   St. Petersburg State University, Luchenkov Ivan R. ,   St. Petersburg State University
Published: January 2024

The article accents to a comprehensive study of the contribution by the Russian and foreign scholars in the preservation and study of the Palmyrene archaeological sites. The paper aims to systematize and synthesize the achievements of various scientific and archaeological schools, field researchers, and philosophical thinkers collecting and analyzing data on the ancient city of Palmyra. One provides the main milestones for the research of the historic and cultural complex through the structural-functional and descriptive-compared methods. It identifies four major successive stages, but at the same time completely not interchangeable between theological and purely scientific-analytic paradigms. In this regard, one provides brief information about the History of Palmyra and the study of the city. It compares the results of various European expeditions and four Russian expeditions (1882, 1900, 2016, and 2019), while offering opportunities for further cooperation in the region. In the context of the research, the paper attempts to give a precise and holistic justification of the motivation for Palmyra by representatives of various intellectual traditions. One covers the development of humanitarian scientific thinking over the past 300 years. It provides the primary intraregional context for several historical events that have impacted both the preservation and destruction of these monuments. The current restoration of Palmyra goes far beyond Russian-Syrian humanitarian relations, as the development of digital technologies has enabled a large-scale work in the last five years. The experience gained will enable me to develop an appropriate strategy for restoring World Cultural Heritage sites.
Trends in the development of Russian administrative law: A comparative legal aspect
Authors:   Siberian University of Consumer Cooperation, Davydov Konstantin ,   Novosibirsk State University of Economics and Management
Published: January 2024

The article substantiates that during the period of development of administrative law as an independent progressive branch of law in the 20th and 21st centuries, two main achievements can be distinguished in world experience. The first is the evolution of the administrative process, administrative procedures, which changed the face of public administration, making it more transparent and democratic, since citizens got the opportunity not only to challenge administrative acts, but also to participate in the procedures for their adoption, protecting their interests even before the approval of the ruling decision. The second key achievement is the approval as categorical imperatives of such principles as legality, equality, proportionality, legal stability (protection of legitimate expectations), prohibition of overformalism. These beginnings are most consistently implemented in the Russian legislation on administrative responsibility, as well as in the legislation on administrative proceedings. In the field of positive public administration, the legislator is still less receptive to these novelties. At the same time, the inertia of the legislator is to a certain extent compensated by the activity of the Russian judicial bodies. The trend towards the perception of the main innovations of administrative law cannot be called into question by special administrative regimes (high preparedness for an emergency, a special military operation, etc.), including for the reason that such regimes, for all their importance, are temporary. Therefore, despite any difficulties, it is necessary to form a regulatory system designed for “usual” normality. At the same time, it is more important than ever to maintain a balance between the goals of rationalizing public administration (protecting public and state security) and protecting the rights of citizens. It is possible to predict further “splitting” of Russian administrative law. On the one hand, administrative legislation will be tightened and politicized, first of all, on the issues of interaction between the domestic administrative system and representatives of unfriendly foreign legal orders (as well as subjects of the Russian legal system, affiliated with them). But for the basis of the model of relations between the Russian public administration and the citizens of the Russian Federation, a predominantly different paradigm should be used — a human rights one.
Sanctions and their influence on contractual obligations in comparative law perspective
Authors:   St. Petersburg State University, Petrova Daria
Published: January 2024

The article analyzes the problems of sanctions restrictions and prohibitions and their influence on contractual obligations. Sanctions objectively and by their nature affect the economy as a whole and therefore influence on contracts concluded by private persons. However today the study of this issue is carried out mainly in the context of public law but not private law. In English law the problem of legislative restrictions and prohibitions and their influence on the dynamics of a contract has been analysed for more than a century in the context of the doctrine of frustration of purpose of contract. And English law provides the termination of the contract due to its frustration because of the imposed sanctions. The English courts carefully apply this approach and use it only when under the influence of legislative restrictions and prohibitions the very sense of contract changes. It can’t be applicable when just the motives of the party to enter into the contract are not realized. This allows, on the one hand, to protect the interested parties to the contract and on the other hand not to destabilize the civil circulation. In Russian law the article 451 of the Civil Code of the Russian Federation is to decide the problem of the influence of sanctions on contractual obligations. However throughout all the time of existence of this rule Russian courts demonstrate a negative attitude towards it and don’t apply it when it is an adequate regulator of the relations of the parties. Today the Russian law enforcement practice allows the party of the contract only to be released from liability for violation of its obligation on the basis of paragraph 3 of art. 401 of the Civil Code of the Russian Federation in the case when such breach occurred due to the enforcement of sanctions restrictions and prohibitions. At the same time, it is worth to mention that this approach of courts is not unambiguous: often courts refuse to recognize sanctions as a force majeure. And this doesn’t contribute to clarity to the law enforcement the practice of application the rules of paragraph 3 of frt. 401 of the Civil Code of the Russian Federation and protecting the parties to the contract from the influence of external circumstances that they can’t either control or prevent.
Hydroclimatic projection: statistical learning and downscaling model for rainfall and runoff forecasting
Authors: Kodihal Shweta , Akhtar M. P. , Maurya Satya Prakash
Published: January 2024

The study is carried out to investigate the surface runoff depth with changing precipitation due to climate change in the study area where sandy loam and loamy soil are dominant. In this study, future rainfall is projected by a statistical downscaling model (SDSM) using a set of predictors derived from a Coupled Model Intercomparison Project Phase 6 (CMIP6) global climate model (GCM) [the Norwegian Earth System Model (NorESM)] with updated scenarios SSP 4.5 and SSP 8.5. Daily rainfall values for the observed period (1981 to 2014) are validated using statistical learning and evaluated with matrices, namely, root mean square error (RMSE), coefficient of correlation, and Nash–Sutcliffe efficiency (NSE), which are found to be valid for further predictions. Rainfall projections show a decrease in rainfall trend of 50% from 2030 to 2040 for scenario SSP 4.5 and an increase of 7% from 2040 to 2050. Predicted rainfall for scenario SSP 8.5 shows a similar trend of decreasing rainfall of 24% for the period 2030–2040 and an increase of 19% in the period 2040–2050. Furthermore, these rainfall values are spatially modelled in a geographic information system (GIS) and rainfall maps are obtained. The obtained rainfall map, land-use map, and soil map are overlaid to compute curve numbers and runoff depths. A similar trend of decrease in runoff is observed for the period 2030–2050. The overall trend of climate change shows a water-stressed scenario.
The pilot corpus of German language textbooks for the second-grade students
Authors: Nechaeva Polina O. , Parshina Veronika V.
Published: January 2024

The article studies the issues of textbooks corpus creation and its application for solving various applied and research problems. The authors have analyzed the works of global and Russian linguists in the field of corpus linguistics. That made it possible to identify the characteristic structural and design features of pedagogical buildings, and, in particular, textbook buildings, as well as to describe various ways of using textbook buildings for conducting linguodidactic research. Special attention is paid to the design and technological process of creating a corpus of textbooks. Having critically analyzed the recommended stages of the corpus creation, the authors have modeled and constructed a corpus of texts of German textbooks for elementary schools, which was tested in a comparative frequency analysis of vocabulary from textbooks. That required using the methods of modeling, frequency-rank method, and comparative analysis. This article was presented as a paper at the 8th Research Conference “Conference on Text Interpretation: Data Analysis in the Social Sciences and Humanities” (17 July 2022, Institute of Social Sciences and Humanities, University of Tyumen).
Healthcare of the Tobolsk North in the middle 19 th – early 20 th century
Authors: Shulyak Ekaterina V.
Published: January 2024

This article aims to analyze the state of public health and medical care in the territory of the Tobolsk North in the middle 19th – early 20th c. using retrospective and narrative methods, the principles of historicism and scientific objectivity. The novelty of the research lies in the previously unpublished archival materials. Based on the analysis of various types of sources, the author reconstructs the process of formation of the health care system and traces the dynamics of solving the identified problems of medical support for the population of the Tobolsk North in the middle of the 19th – early 20th c. The results show sanitary and epidemiological situation on its territory and the specifics of folk medicine of the indigenous population. That allows full coverage of the retrospective of health care in the territory of the Tobolsk province and northern health care in general. Literature review includes the documents from the Russian State Historical Archives funds, the State Archives in Tobolsk, legislative acts, reference publications, materials of the First Provincial Congress of Rural Doctors of the Tobolsk Province, as well as travel notes. The results of the study can be of interest to historians, ethnologists, local historians, and doctors.
Casus Gogotishvili: critical remarks on the concept of predicative symbolism
Authors: Kaianidi Leonid G.
Published: January 2024

L.A. Gogotishvili’s linguophilosophical concepts have become the subject of intense scientific interest in recent years. The research of S. V. Fedotova, A. A. Gravin, E.K. Sozina is devoted to them. These concepts receive panegyric assessments, while they have, in our opinion, a number of obvious semantic and historical inconsistencies. The material of our research was two articles by Gogotishvili devoted directly to the work of Vyacheslav Ivanov (“Between the name and the predicate (symbolism of V. Ivanov against the background of the imiaslavie)” and “The Antinomic principle in the poetry of V. Ivanov”). To critically comprehend Gogotishvili’s concept, we used dialectical-phenomenological, hermeneutic and comparative-historical methods. We critically examine the juxtaposition of Ivanov’s symbolism and imiaslavie, which Gogotishvili justifies on a single mention of imiaslavie in Ivanov’s work, and show that Ivanov was not specifically interested in linguistic and philosophical issues. Then we investigate the problem of the existence of a transcendent referent of the symbol in Ivanov. It is denied by Gogotishvili. However, the analysis of Ivanov’s mystical-aesthetic theory shows that the poet understood the symbolic referent as an objective entity that directly appears in the symbol-name. The Ivanov symbol cannot be understood as an objectless predicate, meaning detached from the transcendent essence. Ivanov’s understanding of the symbol is ontological and as close as possible to Florensky’s concept of the symbol as a face. Gogotishvili claims that the referent of the symbol in Ivanov is a transcendent-immanent “state of consciousness”. We show that this directly contradicts Ivanov’s aesthetics, which has pronounced platonic features and is akin to Plotinus’ teaching about intelligent beauty.
The ambiguity of the inner child image in Ian McEwan’s novel The Child in Time
Authors: Sedova Elena S.
Published: January 2024

The article is devoted to the analysis of the polysemantic image of child in time, which becomes a symbol in McEwan’s novel. It seems important to reveal the psychological core of this image (characters’ return to their childhood, sometimes traumatized; the search for the inner child, acceptance of him), its philosophical comprehension in curls through time as well as the universal human meaning of the child in time. The article includes a comparative analysis of the problem of the relationship between an adult and his child inside/within, using the texts by A. de Saint-Exupery «The Little Prince» and I. McEwan «The Daydreamer», which gives an expanded idea of the topics covered by the authors in their works. We analyze the system of characters in the novel, symbols (bicycles, the pub «The Bell», rain, a child, etc.), which is closely related to the philosophical (the theme of Time, life and death, birth) and psychological (search for a child inside/within) meaning of the novel. Finally, we come to the conclusion that the child in time is the stolen child of the Lewis’ Kate; the writer Stephen Lewis, who is a kind of alter ego of the author; Charles Darke, who falls into childhood and cannot reconcile the adult and the child in himself; the episodic character of the beggar girl. Behind all these characters we can see the tragic figure of the author, who writes partly about himself and his inner child, which is a message to future generations.
Islamic landscape of Tyumen Region in the early 20th — early 21st c.
Authors: Mavlyutova Gulnara Sh. , Cherepanov Maksim S. , Poplavsky Roman O. , Kostomarov Vladimir M.
Published: January 2024

This article examines the transformation of the Islamic landscape in the southern region of Tyumen from the early 20th century to 2020. The Islamic landscape is defined as a collection of religious sites associated with communal Islamic rituals. Three maps illustrate the changes in the number and distribution of functional mosques, as well as the sociodemographic composition of worshipers. The first map represents the Islamic landscape at the beginning of the 20th century, the second at the end of the 1980s, and the third at 2020. Our analysis is based on archival materials, field research conducted by the authors, and relevant literature on the subject. Significant changes have occurred in the Islamic landscape in the southern region of Tyumen since the early 20th century, affecting the number and distribution of religious sites and the composition of mosque attendees. As part of the post-communist sphere, the Islamic landscape in the southern region of Tyumen has been influenced by factors common to most post-communist countries, as well as changes related to regional economic development and geographical location. Repression against religious leaders, an excess of religious sites, and the marginalization of religion during the Soviet era depleted the Islamic landscape. The democratization of social and state relations in the 1990s led to an increase in the variety of religious sites. Additionally, mosques were constructed in historically Tatar villages and areas resettled by populations from Kazakhstan. The ethnic diversity of urban prayer gatherings in the southern region of Tyumen increased with the development of oil and gas industries and further expanded following the democratization of social and state relations.
Adjectival predicate “bad/good” with the pronoun I
Authors: Markasova Elena V.
Published: January 2024

This article explores one type of construction in the Russian language, specifically the “I + adjectival predicate” structure. The adjectival predicate in this construction reflects the instability of self-identification and self-presentation. The composition of adjectives in this construction provides valuable insights into historical changes in self-perception. Using the examples “I am good” and “I am bad”, we examine the possibility of removing the restriction on negative self-characterization. Both adjectives can convey positive or negative evaluations of oneself, and these evaluations can be used for manipulative purposes. Through corpus data analysis, we uncover the cyclical nature of filling the frame of autocharacterization with evaluative adjectives. The dynamics of each variant of filling the frame is complex and follows a non-linear curve. This article is based on a paper presented at the 7th International Research Symposium “Russian Grammar: Constants, Contexts, Perspectives” (October 10–14, 2023, Tyumen, Russia).
The study of heat exchange processes during induction heating of the casing string in relation to the determination of behind-the-casing flows
Authors: Davletshin Filyus F. , Islamov Denis F. , Khabirov Timur R. , Gayazov Marat S. , Nizaeva Irina G.
Published: January 2024

One of the promising methods of geophysical survey of existing wells is active thermometry. The technology for conducting research using this method includes induction heating of a section of a metal casing string, registration and analysis of temperature changes in the range of induction exposure. As a result of heat exchange with the heated section of the column, a thermal disturbance is created in the fluid flow moving inside the column or in the behind-the-casing flow channel. The analysis of non-stationary temperature in the process of induction action allows solving actual practical problems, for example, determining the presence of fluid overflows in the space behind the casing string.
In this work, on the basis of numerical simulation, the features of the formation of a temperature field in the process of inductive heating of the casing string are studied in relation to the determination of behind-the-casing fluid flows. Numerical simulation was performed using the Ansys Fluent software package. Fluid movement in the well is described by the Navier–Stokes equation in the Boussinesq–Oberbeck approximation, and its temperature is calculated taking into account forced and free convection. To calculate the temperature in the inductor, casing string, rocks and cement sheath, a non-stationary heat equation is used. The application of induction heating in diagnosing behind-the-casing flows in the sump, localized below the working perforated formations, in the annular space between the casing string and the cement ring is considered.
The distribution curves of the cross-sectional average temperature in the casing string body in the induction heating interval at different flow rates in the casing cross-flow channel are plotted. It is shown that with an increase in the volume flow in the overflow channel, the maximum heating of the column decreases due to more intense heat transfer to the flow in the overflow channel. It has been established that the temperature curves show a “pull” of temperature (temperature disturbances in the body of the casing string propagate in the direction of flow in the overflow channel), the value of which increases with the flow rate in the overflow channel. It is shown that the temperature “pull” (the distance over which the thermal disturbance propagates) during upward flow exceeds the “pull” during downward flow, which is due to the influence of natural thermal convection in the fluid inside the casing string. On the example of the modeling conditions adopted in the work, it was found that up and down flows of more than 0.5 m3/day can be reliably determined from temperature measurements during the induction effect.
Mathematical modeling of a new method for processing a seismic signal on the example of a section of the Saratov right bank. Part 2
Authors: Fonin Anatoly A. , Suchkov Sergey G. , Nikolayevtsev Victor A. , Mikheyev Sergey I.
Published: January 2024

This paper presents a new method of seismic exploration with two buried receivers on the same vertical, which helps in comparing the experimental seismogram cleared of non-vertical signals with the calculated theoretical seismogram, which depends on the parameters of the layered structure, such as the thickness of the layers, their density, velocity of propagation of longitudinal acoustic waves in rock, and seismic quality factors of media.
The method of least squares aided in the search for the global minimum of the discrepancy function of the calculated and experimental seismic pulse waveforms. The implementation of the algorithm for solving the inverse seismic problem was carried out in the MatLab software package.
The construction of a theoretical seismogram includes the calculation of the spectrum of the input impulse, calculation of the frequency dependences of the reflection coefficients and the passage of waves at the interfaces of rocks with different physical parameters, the calculation of the shape of the seismic impulses received by the receivers.
A comparison of the calculated and real parameters of the geological structure obtained in the COMSOL Multiphysics software package shows that the developed algorithm results in obtaining a seismogram that practically coincides with the experimental seismogram corresponding to the real rock section, with appropriate geological parameters of media, such as thickness, density and propagation velocity of acoustic waves, as well as quality factors.
Gas purification technology from oxygen
Authors: Toropov Evgeniy S. , Pisarev Mikhail O. , Shariddinov Khakim Sh.
Published: January 2024

The relevance of this research lies in the need of reproducing and expanding the technological scheme based on the gas field, located in the Orenburg Region. The technology for extracting oxygen from natural gas is not only underdeveloped — the market opportunities are perceived as limited, including the limitations of gas purification equipment (thus, the need for import). Therefore, the industry faces a new challenge — to develop expertise and competence in this area, which will further increase the economic part of the project.
Objective: to implement the technology of APG (associated petroleum gas) purification from oxygen for its further supply to the main gas pipeline of Gazprom PJSC.
The problem of purifying APG from high oxygen content is considered, showing the advantages and disadvantages of existing schemes, which is of high interest for practical application in field conditions. New environmentally friendly and cost-effective technologies for better treatment of the oxygen content of the APG in the field conditions are presented. The chosen technology excludes formation of toxic by-products and does not require construction of an expensive plant.
The multilateral well model with complete vertical opening of naturally fractured reservoir
Authors: Maykov Dmitriy N. , Makarov Sergey S.
Published: January 2024

A new analytical solution of the diffusivity equation for a mathematical model of a multilateral which penetrates a double-porosity reservoir vertically along the entire thickness has been obtained. The solution of the diffusivity equations is given in the Laplace space and was derived with the assumption of a well constant flow rate and the absence of friction pressure losses in the channels. The analytical solution of the diffusivity equation, written taking into account the presence of a fracture system and pore matrices, contains a modified Bessel function of the first and second kind of zero order and is presented in the form of a matrix equation. The matrix equation is solved using the LU decomposition, and the transfer of the dimensionless pressure from the Laplace space to the Cartesian coordinate system is performed using the Stehfest algorithm. On the basis of the developed numerical algorithm, a parametric analysis of the multilateral well model in a formation with double porosity was carried out. The reservoir flow properties, the parameters of the multilateral well branches, the double porosity model parameters, such as the storativity ratio and the transmissivity ratio, vary. The difference between the calculated parameters of the multilateral well model in a homogeneous formation and in a formation with double porosity is shown. The influence of the storativity ratio and the transmissivity ratio on the pressure drop and the derivative of the pressure drop in the well has been established. It is shown that when the transmissivity ratio decreases by a factor of 10, the start time of the transient regime also increases by a factor of 10. A decrease in the storativity ratio value from 0.01 to 0.005 leads to an increase in the pressure drop at the beginning of the well operation by 14.3% and the pressure drop derivative minimum value of the transient regime reduces by 1.92 times. When the storativity ratio decreases to 0.001, the value of the pressure drop increases by 48.2% and the pressure drop derivative minimum value of the transient regime decreases by 7.5 times.
On the question of the regularities in the transformation of the parameters of the relative phase permeability with a change in the dimension of the oil reservoir model
Authors: Bekman Alexander D. , Stepanov Sergei V. , Zelenin Dmitry V.
Published: January 2024

The article presents the results of research on the search for patterns in the transformation of the parameters of the relative phase permeability function when the dimension of the mathematical model changes using the example of two synthetic models (a single-layer lateral 2D model and a 0D model of the CRM material balance) of an oil deposit located in an inhomogeneous reservoir and developed during flooding. It is established that the transformation of the parameters of the relative phase permeability is associated with the filtration properties and elastic capacity of the formation, as well as with the specifics of well operation. At the same time, for three of the five parameters, the dependence on permeability remains, but in a different form, and for the remaining two parameters, the dependence is lost. The quality of the approximation of dependencies practically does not depend on the volume of the data samples considered. The results obtained are aimed at improving the technology of modeling the development of hydro­carbon deposits, especially in terms of hierarchical modeling.
The method of calculating the parameters of a heat exchanger with porous inserts based on the obtained criterion equation
Authors: Rydalina Natalia V. , Stepanov Oleg A. , Shabarov Alexandr B. , Aleksandrov Mikhail A.
Published: January 2024

The issues of improving the efficiency of heat exchange equipment are relevant. Heat exchange equipment is used in various industries. Porous metals have proven themselves well when used in heat exchange systems of gas turbine and rocket engines, laser mirror systems, nuclear reactors and other similar systems to increase the efficiency of heat exchange. The use of porous structures is effective due to a significant increase in the heat exchange area. The paper presents the results of experimental and theoretical studies of the efficiency of using porous aluminum inserts in the construction of a shell-and-tube heat exchanger.
The efficiency of using porous aluminum inserts in the construction of a shell-and-tube heat exchanger has been experimentally shown. A similarity equation is obtained for calculating the Nusselt criterion, which makes it possible to find the heat transfer coefficient, and as a consequence, heat transfer for the coolant flowing through porous inserts in the inter-tube space of the heat exchanger. A cluster model was used to calculate the heat exchange area from the side of the coolant flowing through the pairs. The correspondence of the obtained calculation formula with the results of the experimental work is shown. A method of thermal calculation of a heat exchanger with porous aluminum inserts using a cluster model and the obtained criterion equation for calculating the heat transfer coefficient is proposed. The conclusion is made about the expediency of using porous metals in heat exchange structures.
Optimization and actualization of the algorithm for calculating integrated gas condensate field models
Authors: Kulagin Artem V. , Varavva Artem I. , Toropov Evgeniy S.
Published: January 2024

Simulation using the hydrodynamic simulator tNavigator with Network option currently allows solving many tasks in the field of integrated modeling. However, in the current solution of the integrated modeling problem, there are problems that force either to apply alternative calculation methods or to introduce assumptions. One of these problems at the moment is the impossibility of calculating temperatures in the collection network. The purpose of this article is to determine the relevance of the chosen problem, literary and technical reviews of possible solutions, as well as to propose a specific solution for updating and optimizing temperature calculations on the product collection network. The main solution considered in the article is to write a Python script for tNavigator that calculates current temperatures in connection with the integrated model, which eliminates the risks of reducing the project’s profit in existing models. The scientific novelty lies in the use of an effective way to solve this problem, which eliminates the need to use the Network tNavigator — PetEx RESOLVE — PetEx GAP bundle, which greatly slows down model calculations. The conclusion can be a preliminary assessment of the effectiveness and accuracy of the decision regarding the method using RESOLVE and GAP.
Numerical study of the gas production process from a gas hydrate deposit in the presence of thermal and depression effects
Authors: Musakaev Nail G. , Belskikh Denis S.
Published: January 2024

Today the issue of gas production technology from existing gas hydrate deposits discovered on the shelf of the World Ocean and in permafrost areas is still very significant since the methane reserves in the free state are significantly inferior to its reserves in the form of its gas hydrates. One of the tasks for possible gas production from a hydrate-containing porous medium is to study the process of gas hydrate decomposition under thermal and depression effects since they are most commonly used ones. It is necessary to conduct a theoretical study including the development of a mathematical mode and its algorithmization, the creation of a computational program and the conduct of numerical experiments.
The paper presents one-dimensional axisymmetric problem of heating and/or pressure reduction at the bottom of a well passing through the entire thickness of a porous formation when its pores are initially filled with methane and its hydrate. The utilized mathematical model includes the continuity equations for methane, its hydrate and water; the equation of the gas phase motion in a porous medium as the Darcy filtration law; the state equation of methane and water, the energy conservation equation considering the Joule–Thomson effects and adiabatic cooling for gas, the latent heat of the “gas hydrate  methane + water” phase transition. A numerical implementation of the proposed mathematical model and a numerical study of the thermal and/or depression impact on the studied hydrate-bearing deposit are carried out.
The results of calculations show that the size of a zone containing only the gas hydrate decomposition products (gas and water) slightly increases with a smaller length of a porous layer. They also show that the thermal effect (increasing the temperature at the bottomhole of production well) on the hydrate-saturated reservoir simultaneously with the depression effect is not efficient enough due to the intensive flow of cold gas (with a temperature equal to the initial temperature of the reservoir) from the hydrate-containing deposit to the well.
Equivalent diffusion ratio distribution in the UGT15000 low pressure compressor
Authors: Aksyonov Andrei N.
Published: January 2024

With spatial and temporal periodicity approach the results of steady state CFD simulation of compressible air flow in each blade-to-blade row of low pressure compressor (LPC) of the UGT15000 gas turbine engine (Ukrainian SSR constr. and prod.) are presented. Near the nominal rotation speed compressor map and adiabatic efficiency of each stage and the flow angles at leading and trailing blade edges are predicted and calculated. At the average radius stage flow and stage load coefficients are determined.
It has been established that the reason of the low efficiency of the last stage is associated with the low stage reaction (≈0.5) leading to high airflow swirling at outlet. For LPC optimization a calculation of the radial distributions of the equivalent diffuser coefficient was performed. It is shown that the greatest total pressure losses are in the stator rows of stages 9, 8, 5 and in the rotor rows of stage 9. High losses are also shown on the upper half of the 4th, 3rd, 2nd stator blades and the lower half of the 1st rotor blades. The identified potential for increasing the efficiency of the LPC is up to 2% without significant construction changes.
Development of the concept of a multiphase flowmeter
Authors: Puritskis Janis V. , Vershinin Vladimir E.
Published: January 2024

In a number of industries: oil and gas, chemical and nuclear industries, the task of controlling multiphase flow regimes arises. In the nuclear and chemical industries, the flow regime directly affects the nature of technological processes and their safety. In the oil and gas industry, the products extracted from wells are usually a mixture of oil, water and gas, and the task of monitoring the flow regime is related to compliance with the permissible parameters of pumping and control equipment. When using multiphase flowmeters of the flow type, the algorithms for calculating phase flow rates in a multiphase flow are very sensitive to a violation of the uniformity and homogeneity of the measured flow. Excessive noise of the signal of pressure sensors, volume content and flow caused by projectile, cork or stratified modes can negatively affect the accuracy of measurements. As a rule, flow mode maps are used when determining the current mode. This approach is based on the calculation of a number of dimensionless flow parameters (Froude number, Lockhart–Martinelli parameter, etc.). In the case of a dynamically changing flow, this approach may not be suitable. For a more accurate and reliable determination of flow modes, it is proposed to use a direct method of analyzing the spatial distribution of phases in the flow and recognizing the type of flow using artificial convolutional neural networks. This approach allows you to get rid of classification errors and get more accurate information about the flow.
The aim of the study is to develop a technique for neural network analysis of images of a multiphase flow with subsequent determination of its type. In the course of the work, approaches to the formation of a training sample are considered, the search for the optimal structure of the neural network is carried out and an accuracy assessment is given for the classification of multiphase flow modes by a convolutional neural network. The study was carried out on two types of data: 1) synthetic images obtained using numerical simulation of multiphase flows, and 2) experimentally obtained flow images on a multiphase flow stand.
A evolução do Sistema de Formação Profissional em Portugal e o papel dos Fundos Europeus
Authors: Feliciano Paulo
Published: January 2024

The article analyses the evolution of the vocational training system from the moment it began to benefit from European funds to support its operation. The approach developed seeks to explore the interaction between the funding channeled by European funds and the national political impetus in the evolution of the vocational training system. The analysis made it possible to establish four major phases in the development of the system, while identifying the main attributes that distinguished them and locating the main factors of change that could be observed over time.