SovietRxiv · Open Access in English
Rediscovering the Soviet scientific archive, in English
25357 full-text translations 14926 English PDFs 22539 abstracts
Showing 50 of 25357 papers
This paper examines how many perforation holes in the casing of an oil exploration well are rational for obtaining inflow from a one meter oil bearing bed under specified reservoir and well conditions. Using formulas for the geometric characteristics of the holes’ influence zones and plane radial fl…
This paper addresses methodological difficulties in constructing hydrogeological and hydrogeochemical maps for platform regions, especially closed and semi-closed territories where overlapping aquifer complexes obscure vertical groundwater zonality and can overload conventional maps. Using groundwat…
This paper examines the hydrogeochemical conditions of oil and gas bearing regions of Tomsk Oblast and their significance for regional appraisal and prospecting. Using groundwater chemistry, dissolved gas composition, isotopic observations, microbiological data, and hydrogeological interpretation, t…
This paper examines the hydrogeology and hydrogeochemistry of bog and peat waters in Tomsk Oblast and adjacent parts of the West Siberian Lowland. Drawing on field sampling of waters, gases, rocks, and peats since 1963, together with boreholes, pits, chemical analyses, and archival geological materi…
This paper reviews the occurrence, composition, and potential therapeutic use of mineral waters in Tomsk Oblast in the context of growing demand for a regional sanatorium and resort base. Using data from hydrogeological investigations and a schematic mineral water map compiled with a proposed method…
This paper surveys the hydrogeological conditions and groundwater resources of Tomsk Oblast, emphasizing their significance for water supply, mineral exploration, oil production, and possible thermal use. It characterizes the main aquifer complexes from Quaternary through Jurassic deposits, comparin…
This paper reviews the state of hydrogeological and hydrogeochemical investigation in Tomsk Oblast and adjacent parts of southeastern Western Siberia, emphasizing groundwater resources for water supply, irrigation, thermal and mineral water use, oil-field development, and mineral prospecting. The au…
This paper addresses how many control cube specimens are needed to assess the quality and homogeneity of concrete mixes produced by a mixing and transporting machine using strength based criteria. The authors test 30 specimens for each of three concrete grades, analyze strength distributions with st…
This paper compares the intensity and direction of modern chemical weathering in northern and southern humid zones using a hydrogeochemical approach based on groundwater composition, runoff, and mineral stability relations. Data from the Igarka, Norilsk region of the Siberian Platform are contrasted…
This study examines the relationship between antimony and humus-type organic matter in natural waters and model aqueous solutions. Field sampling at the Semiluzhenskoe antimony occurrence was combined with determinations of organic carbon and antimony, laboratory dissolution experiments with antimon…
This paper examines whether the acidity or alkalinity of postmagmatic mineral-forming solutions influenced the chemical and trace-element composition of magnetites from successive stages of the Lebed skarn gold-ore deposit in Gorny Altai. Using chemical analyses, semiquantitative spectral data, and …
This paper examines the hydrogeochemical conditions of groundwater in the Erunakovsky coal-bearing region of the central Kuznetsk Basin, focusing on gentle brachystructures, lithologic-stratigraphic aquifer complexes, tectonic disturbance zones, and landscape controls. Using chemical analyses of wat…
The paper develops geostatistical expressions for estimating variability and aggregate error in mean exploration parameters of mineral deposits under linear interpolation. It argues that limiting first differences better represent observed variability in unimodal and multimodal frequency distributio…
This paper examines Jurassic siderites from oil- and gas-bearing deposits of Tomsk Oblast as potential indicators of diagenetic intensity. Using lithological and petrographic observations from well cores, it describes oolitic, pelitomorphic, spherulitic, and granular structural-textural forms, with …
This paper examines the internal tectonic structure of the Mrassky massif in the southern Kuznetsk Alatau, using published geological materials together with field observations from several districts. It distinguishes two structural stages: a lower Late Proterozoic to earliest Cambrian stage of tigh…
This paper investigates the origin of green, blue, and violet coloration in synthetic fluorite grown by the Stockbarger method after spectral analysis excluded the rare earth impurities initially suspected. Microscopic, crystallographic, and optical observations show that the fluorite contains uneve…
This paper examines cinnabar mineralization in the northwestern part of the Kuznetsk Alatau and its relationship to the region’s fault-controlled tectonic framework at the junction of the Kuznetsk Depression and the Kuznetsk Alatau. Drawing on field investigations from 1964 to 1968 and earlier geolo…
This paper examines the genesis of alkaline, nepheline-bearing rocks of Tyrdanov Ulus in the northwestern endocontact zone of the Uibat granitoid pluton, where competing interpretations linked them either to contact interaction with carbonate rocks or to an independent Devonian gabbro-syenite format…
This article reports on the organization and performance of K. E. Shefer’s integrated tunneling brigade during rapid underground exploration work at the Karamken gold and silver deposit under permafrost conditions. It describes the brigade’s staffing, equipment, cyclic work schedule, drilling and bl…
This paper examines the origin of gabbro, diorite, and plagiogranite associations in the Altai and Sayan region, addressing whether they reflect separate basic and acidic intrusions, assimilation by granitic magma, or differentiation within a single source. Using geological relationships, zonal stru…
This paper examines patterns in the stratigraphic distribution of giant oil and gas fields on young and ancient platforms from the Cambrian through the Upper Cretaceous. Using comparative examples from the Russian, West Siberian, Arabian, African, North American, Turan, and other platforms, it argue…
This article examines modern exogenous deformation of Quaternary lacustrine, bog, and proluvial deposits in the Lake Marekul area of the Karysh accumulative plain, Khakassia. Based on field observations over two decades, geomorphic evidence, sections, and vertical electrical sounding data, the autho…
This paper reports geochemical prospecting results from the Semiluzhenskoye antimony ore occurrence in Tomsk Oblast, situated within the Kolarovo, Semiluzhenskaya fault zone. Mercurometric and metallometric surveys of mercury and associated indicator elements, including barium, strontium, and zinc, …
This paper describes antimony and mercury mineralization within the Tomsk salient in southern Tomsk Oblast, particularly along the Kolarovo to Semiluzhki deformation zone in the northern Tom to Kolyvan folded zone. Drawing on field discoveries, heavy-mineral and metallometric surveys, drilling resul…
This paper analyzes third- and fourth-order low-frequency amplifier circuits with parallel negative feedback, intended for very low frequency and long-duration pulse signal amplification using microcurrent silicon bipolar transistors. Using signal-graph methods, it derives a general complex gain exp…
This paper proposes a methodology for analog computer modeling of capacitor motors with three-phase stator windings operating from a single-phase supply, with emphasis on transient conditions where voltage asymmetry varies over time. Using a capacitor synchronous reluctance motor as an example, it f…
The paper addresses voltage and frequency control of a single-phase capacitor synchronous reluctance motor supplied through a phase-shifting capacitor, with the aim of maintaining constant overload capability over a variable-frequency operating range. It develops analytical dependences for the requi…
The paper examines the choice of motor type and connection circuit for low-power precision speed control systems requiring stable rotational speed, speed switching, low vibration, and reliable braking. It compares permanent-magnet, hysteresis, and synchronous reluctance motors, arguing that mass-pro…
This paper investigates pulse-width synchronization of a magnetotransistor multivibrator with emitter-base coupling, motivated by the need to obtain duration-controlled bipolar output voltage directly rather than by combining outputs from two multivibrators. The authors analyze operating modes as fu…
This paper examines internal compensation of load reactive energy in a three-phase bridge inverter with pole commutation operating under sinusoidal pulse-width modulation. It analyzes the conditions under which the inverter current drawn from the dc source remains unidirectional and shows that compl…
This paper analyzes operating electromagnetic processes in a three-phase bridge thyristor inverter with pole commutation operating under sinusoidal pulse-width modulation. Separating operating processes from commutation processes, the authors describe valve states over one sixth of the period and us…
This paper examines how finite commutation time in thyristor pulsed DC converters affects the electromechanical characteristics of electric drives with series-wound motors. It distinguishes converters with instantaneous interruption from those in which energy continues to be supplied during commutat…
The paper examines calculation methods for the electromechanical and mechanical characteristics of a series-excited DC motor supplied by a thyristor PWM converter, with attention to nonlinear excitation flux and nonideal circuit elements. It compares existing graphical and analytical approaches by e…
This paper examines the dynamics of frequency reversal in an induction motor, emphasizing effects that are not captured by static mechanical characteristics or by analogy with phase-sequence switching reversal. Using differential-equation modeling on an analog computer for a DAT 250-8 motor, the aut…
This paper examines torque regulation of an induction motor under small speed variations, autonomous power supply current limits, and significant supply voltage fluctuations. It proposes a simplified frequency-control scheme that stabilizes the active component of stator current by regulating supply…
The paper examines electromagnetic transients that arise when an induction motor torque is controlled by short pulses under dynamic load, a case in which the common assumption of an instantaneous rectangular torque response may fail. Using two-axis motor equations solved on an analog computer, the a…
This paper develops a generalized analysis of electromagnetic processes in multiphase bridge voltage-source inverters using switching functions and the discrete Laplace transform. It derives expressions for quasi-steady and transient load currents, source current, reactive energy exchange, and criti…
The paper addresses how long flexible elastic ropes should be represented as dynamic elements in automatic regulation systems, with emphasis on vertically suspended weighted ropes whose tension is controlled by changing rope length. It derives the static tension, elongation relationship and shows th…
This paper investigates the dynamic behavior and parameter synthesis of a nonlinear automatic power control system for a DSV-3.5 electric arc steelmaking furnace. Using an EMU-10 analog computer model, the authors examine the effects of actuator backlash, amplifier saturation, motor armature current…
The article examines the formation of specified transient processes in nonlinear automatic control systems for electric drives, focusing on tracking dc drives with saturation, current limiting, and reactive static torque. It argues that self-tuning systems with a reference model are preferable to di…
A discrete transformer and thyristor programmable voltage regulator is proposed for technological processes requiring time-varying periodic or nonperiodic output voltages without mechanical contacts. The device uses an inverter, transformer voltage-addition sections, isolating diodes, a current sens…
This paper examines charge-discharge devices for storage battery training cycles in which charging and discharging are combined in time and energy is exchanged between battery groups. It describes circuit variants using controlled switches, chokes, diodes, and regulated charging rectifiers to stabil…
The paper addresses the calculation of electromagnetic parameters for low-power power transformers operating at increased frequencies, where conventional choices of induction can lead to excessive core heating and unfavorable magnetizing conditions. It derives general expressions for permissible mag…
This paper discusses the design of high-speed AC voltage stabilizers using magnetic-semiconductor regulating elements, emphasizing the limitations introduced by conventional filtered feedback circuits. It proposes an inertia-free feedback method based on monitoring the volt-second area of the contro…
The paper analyzes transient processes in a magnetic-semiconductor AC voltage regulator with forced commutation when it is supplied by a rectangular-wave electromotive force source. Under assumptions of an active load, negligible winding resistance and leakage inductance, and constant dynamic resist…
This paper compares ferromagnetic voltage and current regulators with continuous and pulse control, addressing their competitiveness relative to thyristor and transistor devices. It proposes a classification of pulse-controlled ferromagnetic regulators into pulse-premagnetized devices, regulated by …
This paper examines forced-commutation devices for thyristor reversible pulse-width converters, focusing on a circuit with independent charging of the commutating capacitor and a diode-inductive reset path. The authors formulate differential equations for the charging, commutation, and recharge inte…
This paper analyzes the static characteristics of a pulsed DC thyristor converter whose forced commutation unit uses a saturable reactor shunted by a linear inductance and diode. Using matched interval solutions of the commutation circuit equations, with ideal valves and approximately constant load …
This paper analyzes harmonic distortion in the line current and bus voltage of a thyristor reactive power compensator composed of capacitor banks and line reactors switched by antiparallel thyristors. Under assumptions of sinusoidal constant supply voltage and lossless elements, it derives piecewise…
A calculation method is developed for the static electromechanical, mechanical, and control characteristics of DC electric drives supplied by thyristor reversible pulse-width converters with a variable commutation law. Using quasi-steady analysis of electromagnetic processes under idealized circuit …
