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 addresses the determination of trace copper and bismuth impurities in high-purity lead, where conventional chemical-spectral methods are laborious and direct amalgam polarography is hindered by overlapping anodic peaks and matrix effects. The authors develop an amalgam-polarographic proce…
This study examines how supporting electrolyte composition affects the ammonium amalgam effect in accumulation amalgam polarography, focusing on the growth kinetics and limiting radius of ammonium amalgam foam droplets on mercury electrodes. Experiments with aqueous ammonium salts showed that anions…
This study examines the use of aqueous sodium humate solutions as plasticizing and binding additives in the pelletizing of fine grained marshalite. Laboratory pan granulation experiments varied humate concentration and granulation time, measuring granule density, crushing strength in raw and dried s…
The study examines the polarographic behavior of 9-methyl-3-acetylcarbazole in order to support kinetic investigations of its reduction and to establish a quantitative analytical procedure for reaction mixtures. Using acetate buffer solutions containing 50 percent ethanol and a dropping mercury elec…
This paper examines the high-temperature polymorphism of magnesium metasilicate, focusing on the debated relationship between clinoenstatite and protoenstatite. Using high-sensitivity thermography and in situ X-ray diffraction on nearly single-phase clinoenstatite synthesized from purified talc, the…
This paper examines how the moisture-dependent aggregate state of flotation coal concentrate affects its handling and drying behavior. The authors argue that capillary moisture governs the transition from free-flowing material to a favorable polyaggregate structure and then to weakly cohesive capill…
This paper reexamines the lower boundary of the phosphorite-bearing Belkinskaya Formation in Gornaya Shoria, previously interpreted as conformable on the Late Precambrian Zapadnosibirskaya Formation. On the basis of 1965 geological mapping, borehole and ditch observations, stromatolite marker horizo…
This paper examines the depth facies and thermodynamic conditions under which the Lebedev pluton of Gorny Altai formed, with attention to implications for intrusive evolution and possible mineralization. Using field relations, contact metamorphic assemblages, petrographic indicators, feldspar thermo…
This paper examines the petrochemical characteristics of volcanic rocks exposed near elevation 808.5 on the Batenev Ridge, where Lower Paleozoic volcanic and volcaniclastic sequences are cut by breccias, syenitic bodies, and dikes of varied composition. Using petrographic observations, geological re…
This paper describes small fissure volcanic edifices identified near the Yuliya mine on the Batenevsky Ridge, where fissure eruption structures are difficult to distinguish from ordinary or other clastic dikes. Using field relations, petrographic observations, and limited chemical data, the author c…
This paper documents trilobite-bearing limestone interbeds within a sandy-shale sequence near the Yuliya mine on the Batenevsky Ridge, whose stratigraphic position had previously been uncertain. On the basis of collected trilobites, including the zonal form Oryctocephalops frischenfeldi, the sequenc…
This paper examines oil inflow to hydrodynamically imperfect wells, especially cased wells where flow enters only through perforations rather than across the full reservoir interval. Starting from Dupuit’s formula for a perfect well, the authors derive pressure drop expressions for hemispherical and…
The article addresses how to distinguish ordered and random spatial variability in physicomechanical rock properties, a problem important for engineering geological sampling and selection of design parameters. It proposes applying a nonparametric sign test based on runs above and below the median, w…
This paper examines the origin of rounded and sculptured titanomagnetite forms in granites of the Mokhnatukhinsky massif in Rudny Altai. Using sampling across geochemical profiles, mineral separation, morphological observation, frequency analysis, and semiquantitative spectral analysis, the study do…
This paper addresses the statistical treatment of engineering-geological property indicators for heterogeneous layered soils, where conventional weighted averages used in stability calculations may be inadequate when layer samples differ in number and variance. It proposes testing the homogeneity of…
This paper examines the origin of the spilite-diabase formation in the southwestern Kuznetsk Alatau, where Lower Cambrian volcanogenic and associated sedimentary rocks occur along deep fault zones in a eugeosynclinal setting. Using petrographic observations, chemical analyses, and comparative petroc…
This paper reexamines the Late Precambrian and Cambrian stratigraphy of the Bely Iyus River basin between Efremkino and Malaya Syya on the eastern slope of the Kuznetsk Alatau. Based on detailed geological mapping from 1961 to 1966 and numerous fossil and floral finds, it subdivides an approximately…
This paper examines the mineral parageneses of the Batanayul alkaline rock massif in relation to the chemical potentials of sodium and potassium alkalis. On the basis of field observations, petrographic relationships, and multicomponent mineral-reaction diagrams after Korzhinskii and Sobolev, the au…
This paper examines mineralogical zonality in the labrador bereshite sill of the Batanayul alkaline rock massif in the northern Kuznetsk Alatau. Based on petrographic observations from the footwall through the central and roof zones, it describes changes in texture, crystallinity, and mineral assemb…
This paper examines hybridism and assimilation in the granitoids of the Mustag intrusion in Gornaya Shoria, using petrographic, mineralogical, and chemical observations from several massifs. It describes zoned second-phase granitoids that grade from central biotite granites to more basic endocontact…
This paper applies formational analysis to the northeastern Western Sayan, an area shaped by repeated effusive and intrusive magmatism along the Kandat and Kurtushiba deep faults. It distinguishes successive magmatic formations in the North Sayan and Kurtushiba mobile zones, including Cambrian spili…
This paper examines the distribution of major non-ore components in the iron-bearing horizons of the Late Cretaceous to Early Paleogene Bakchar deposit in the West Siberian iron-ore basin. Using chemical analyses and correlation relationships, it characterizes the occurrence of silicon, phosphorus, …
This paper examines the formation of oolitic and pisolitic diffusion structures as closed, metastable microsystems governed by Liesegang-type periodic precipitation. Using experimental rings of iron hydroxide and silver dichromate in gelatin, the author analyzes the asymmetric distribution of precip…
This paper examines the structural and lithological controls on gold ore localization in the Olkhovskoye and Medvezhye areas of the Eastern Sayan, situated near a granodiorite intrusion within metamorphosed Cambrian formations. Using observations of ore body morphology, fracture systems, intrusive c…
This paper addresses interpretation of borehole vector magnetic surveys, particularly for two-dimensional magnetized bodies measured with a three-component borehole magnetometer. It proposes two practical uses of D. S. Mikov’s point nomogram: quantitative fitting of the total anomaly curve along a b…
This note studies a class of singular integral operators in a half-space whose kernels have singularities on a hypersurface and are related to the generalized shift operator. The authors formulate the operators in several equivalent forms, identify a necessary and sufficient cancellation condition f…
This paper addresses the determination of the limiting rating of high-voltage shunt reactors under railway transport dimensional constraints. It develops an optimization method for a single-phase reactor with a laminated core, coil winding, and air gap, deriving expressions for power as a function o…
The paper addresses the practical problem of selecting a rational number of electricians in an installation brigade, balancing the risks of worker idle time against delays in completing assigned work. It proposes a queueing theory approach in which the flow of work requests is estimated from project…
The article examines how the cost level of electrical installation work depends on technical and economic indicators that are not captured by simple comparisons of planned and actual costs. Using 1966 data from twelve installation departments of the Sibelektromontazh trust, it applies correlation an…
This paper evaluates the maximum interrupting capacity required for generator-voltage bus-section circuit breakers at thermal power plants. Using two typical station bus schemes, the authors calculate three-phase short-circuit breaking power under assumptions including infinite higher-voltage system…
The paper introduces integral shifted Legendre polynomials, defined as integrals of the shifted Legendre polynomials on the interval \((0,1)\), and derives their main analytic properties. It gives hypergeometric and explicit polynomial representations, a differential equation, relations to neighbori…
This paper develops practical methods for approximate inversion of Laplace transforms when direct evaluation of the Bromwich integral or root finding for rational images is inconvenient. It represents originals by finite expansions in exponential Chebyshev functions of the third kind and in integral…
This paper develops interpolation methods for approximating time functions on a semi-infinite interval using Chebyshev exponential polynomials of the first kind and Chebyshev exponential functions of the third kind. It formulates several interpolation schemes in finite-dimensional Euclidean subspace…
The paper derives convolution type integral relations connecting Legendre and Chebyshev polynomials through Laplace transforms of associated exponential polynomial systems. Starting from transform representations for exponential Chebyshev polynomials, it obtains formulas expressing Chebyshev polynom…
This paper addresses voltage regulation at load supply centers using an integral criterion of voltage quality, with attention to transformers and autotransformers equipped for regulation under load. It formulates the selection of source voltage and transformer ratios as a minimization of voltage-rel…
This paper proposes an indirect method for estimating the voltage damage coefficient used in evaluating power supply quality and designing industrial electrical networks. The authors relate damage from voltage deviations to the reduced costs of alternative network variants, equating the cost of inst…
This paper examines how regulating effects of intermediate power systems influence the aperiodic static stability of long-distance alternating-current power transmission. Using a small-oscillation formulation for a remote generating station, the authors incorporate active and reactive power balance …
This paper examines how different static representations of a complex intermediate load affect the static stability power limit of a long-distance AC transmission line. Using calculations for a lossless 1000 km, 500 kV line with a midpoint connection, the authors vary the voltage regulating effects …
This paper examines how an intermediate electric system connected to a long distance AC transmission line affects the static stability limit of transmitted power. It formulates the influence of the intermediate system through generalized static voltage characteristics of its generators and loads, de…
This paper proposes an electromagnetic relay for relay protection and automation that responds to changes in the area of the line-voltage triangle using a contactless functional converter, specifically a Spinelli frequency tripler. The authors derive relationships between the tripler output voltage,…
This article develops a more accurate techno-economic procedure for determining the dimensions of medium- and high-power smoothing reactors with an air gap equal to the winding height. Using a trapezoidal model of magnetic induction in and across the winding, it derives expressions for flux linkage,…
The paper presents a practical method for calculating transformer leakage inductance when windings are placed arbitrarily on a single core leg. Building on Kapp’s formula and concepts of leakage-field geometry, it introduces an angular parameter describing the relative axial and radial displacement …
The paper investigates optimization of very high power three-phase two-winding transformers, with emphasis on minimizing active-material weight reduced to steel and minimizing calculated total costs including acquisition, installation, operation, and loss-related capacity costs. Using established de…
This paper develops a method for estimating the limiting power of transformers using a generalized low-voltage coil winding and a multilayer high-voltage winding under constraints on heat transfer, short-circuit voltage, and transport dimensions. Starting from a transformer power expression per core…
This paper derives a method for determining the rotor field potential in a cylindrical electrostatic machine with conducting conveyor rods embedded in a dielectric rotor. Treating the problem as two-dimensional, it formulates the potential in a multilayer annular dielectric region with grounded inne…
The paper develops an analytical method for calculating the stator electric field of a cylindrical electrostatic generator with conducting carriers. Under assumptions of a two-dimensional field, negligible end effects, and a homogeneous rotor dielectric without local conductor disturbances, the prob…
The paper derives a general solution for the electrostatic potential in a long three-layer cylindrical dielectric of annular cross section with prescribed angular potential distributions on the inner and outer boundary surfaces. Treating the field as plane-parallel and charge-free, it solves Laplace…
This paper analyzes how the connection circuit of an electrostatic generator with cascade-connected carrier conductors affects its external characteristic. Using a calculation method based on partial capacitances, the authors compare unipolar generators with conduction and induction excitation circu…
This paper examines double natural charge transfer in electrostatic generators using a dielectric rotor or cascaded conductor transporters embedded in a dielectric. It develops a capacitance-based model for the load current under surface charging and compares the predicted behavior with short-circui…
The paper develops approximate engineering relationships for partial capacitances in rod type electrostatic generators with cylindrical transporter electrodes, including finite length edge effects. It uses electrolytic bath modeling under geometrically similar boundary conditions to measure partial …
