SovietRxiv · Open Access in English
Rediscovering the Soviet scientific archive, in English
25357 full-text translations 14926 English PDFs 22539 abstracts
Showing 23 of 73 papers in Engineering & Technology
The paper addresses the synthesis of passive reactive two-port networks as chains of elementary, indecomposable two-ports, focusing on the transmission matrix rather than only the impedance matrix. It formulates the reactivity conditions for a frequency-dependent transmission matrix as rational pari…
The paper addresses numerical solution of the nonlinear plane equation for magnetic potential in iron when saturation is represented through a permeability depending on the squared gradient of the potential. It formulates a finite difference scheme analogous to stationary heat conduction with variab…
This paper examines the dynamic stability and postcritical motion of a hinged square plate with an initial sinusoidal deflection under time-dependent uniaxial compression. The nonlinear plate equations are solved by a finite-difference scheme of second-order accuracy, with time stepping for deflecti…
This study revises the cobalt rich portion of the cobalt boron phase diagram in light of evidence for the compound Co3B, which had not been included in earlier diagrams. Alloys containing 2 to 8.7 percent boron, along with dilute alloys down to 0.1 percent boron by charge, were prepared from high pu…
This paper examines capillary contraction forces that arise during drying in gel films and porous disperse bodies, with particular attention to cement systems and their role in shrinkage, cracking, and concrete corrosion. The authors describe a direct integral measurement method that follows these f…
The paper formulates differential equations for steady asynchronous operation in electrical systems after a synchronous machine loses synchronism, with emphasis on when the resulting linear system has periodic rather than constant coefficients. Using a system of two synchronous generators, an induct…
This paper reports extended field measurements of shear stress relaxation along the lateral surface of loaded piles frozen into permafrost soils at the Yakutsk research site. Using electrical strain measurements in instrumented duralumin pile tubes under stepwise tensile and compressive loads, the s…
This paper investigates whether electrocapillary motion can displace liquid metal and sulfide droplets in molten metallurgical slags, a possible mechanism relevant to losses of suspended metal droplets. Experiments at 1370 to 1500°C used a magnesia cell containing a CaO, Al2O3, and SiO2 slag and mea…
This paper develops an analytical treatment of commutation in commutator machines for cases where the process is governed primarily by contact conductivity under the brushes. Starting from the classical Arnold and Mie commutation equation, it expresses the additional commutation current through inco…
This paper reports experiments on how external lateral pressure affects the permeability of natural oil-bearing rocks during loading and unloading, a problem relevant to pressure decline and recovery in reservoirs. Core samples from Bashkiria and the Caucasus, with air permeabilities from 0.2 to 100…
The paper proposes a general way to characterize nonlinear electrical circuit elements under transient conditions, arguing that a single dynamic curve depends on the applied waveform and should be replaced by a characteristic surface in phase space involving variables and their derivatives. It discu…
This paper investigates the removal of valuable sulfide and matte inclusions from molten waste slags by applying a direct electric field and using electrocapillary motion of liquid drops. Experiments at about 1400 C measured the motion of nickel sulfide and matte droplets in slags of varying viscosi…
This paper addresses the effect of goafs on mine ventilation, particularly the loss of air from haulage and ventilation drifts into mined-out spaces near working faces. It develops an approximate method that replaces continuously distributed leakage into the goaf with a concentrated fictitious flow …
This paper presents an electrical strain measurement method for determining tangential reactions along the lateral surface of a loaded pile frozen into perennially frozen soil. It formulates the pile equilibrium problem, relates measured normal stresses in a duralumin tube to the distribution of she…
This paper analyzes the deposition of aerosol particles on an infinite circular cylinder in a transverse flow under attractive electrostatic and molecular forces, with gravity, inertia, and Brownian motion neglected. Using the particle equations of motion and a stream-function formulation, it derive…
This paper develops a general method for constructing fully accessible switching systems, defined as discrete switching networks able to connect any input to any output regardless of existing connections, within the capacity limits set by the numbers of inputs and outputs. Extending Clos’s construct…
This paper examines how second harmonic terms in the Fourier expansions of stator inductances and mutual inductances affect the transformed equations of transient electromechanical processes in a salient-pole synchronous machine. Starting from phase-coordinate voltage, flux linkage, and torque equat…
This paper derives equations for transient processes in a three phase static circuit element, represented by an r, L, C branch, after transformation from phase coordinates to a rotating coordinate system with arbitrary angular velocity. Using Park’s transformation, it expresses line voltages, curren…
This paper develops a unified control-theoretic account of photoelectric fluxmeters, treating them as closed-loop systems analogous to operational amplifiers with negative feedback through a differentiating element. Using operational calculus, it derives transfer functions for the galvanometer, phot…
A method is presented for solving a broad class of plane elasticity problems in doubly connected regions bounded by circles, including finite, infinite, and semi-infinite plates with circular holes loaded along their contours. Using complex stress functions and functional equations, the approach int…
This study examines how surface-active additives affect the dry vibrational grinding of Portland cement in a laboratory vibratory mill. Hydrophilizing and hydrophobizing substances were added in varying concentrations, and grinding kinetics, specific surface area, and particle-size distributions wer…
The paper develops a real-variable formulation for transient electromechanical processes in asynchronous machines that avoids the periodic coefficients appearing in phase-coordinate equations. Using Park transformations for stator and rotor quantities in a rotating d, q, 0 coordinate system with arb…
