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In recent 50 years it was repeatedly noted that soil radon can markedly respond to changing intensive-deforming condition of geological medium. This fact encourages the scientists of different countries to create reliable methods of predicting severe earthquakes in seismic active regions of the earth. The information published in scientific literature, however, testifies the fact of insufficient study...
In this paper it is appropriate to describe similar systems using more adequate mathematical models, for example, stochastic differential equations in which the coefficients of differential operator are random. Marked interest to these system analysis methods has greatly increased in recent years that is connected, firstly, with the modern level of computer technique development. Secondly, combination...
Control systems based on mathematical apparatus of fuzzy logics are designed to replace an-operator and to be applied in the systems with difficult formalized strategy of control. The main merit of fuzzy controllers (FC) compared to classical variant of control system is their stability to input noises effect. This led to wide spread of control systems based on fuzzy logics including the areas in...
The aim of the paper is to discuss about the structural transformations at high-speed steel heating. Under the conditions of high-speed heating steel of posteutectoid composition realized by laser application and electron accelerator ledeburite formation that is the structure characteristic for pig iron has metallographically been revealed. Ledeburite formation in steels is conditioned by quick achievement...
The aim of the work was to investigate the compatibility between aluminum nanopowders and different chemical substances. The nanopowders were created by electrical explosion of aluminum wire method in argon medium. It was established that the introduction of all non-organic additions in quantity of 10% mass leads to an increase of the initial temperature of oxidation of aluminum.
The ageing of a human organism has been in the focus of attention in physics of live systems over the past years. One of the most significant systems of vital activity of a human body is its cardiovascular system. Today there are a number of scientific studies on the problems of biological ageing of the cardiovascular human system. The latter is extremely sensitive to age-related as well as pathological...
The research work explores the problem of durability of asphalt concrete and tried to find cheap and available activator for bitumen. There are a lot of different road-building materials nowadays. Some of them are organic binding materials. The most widespread kinds of binding materials used nowadays are bitumens. They are cheap and popular in road-building industry. The most popular bitumen, used...
The given work is devoted to investigation of a sealed a.c. motor of end fabrication. At the enterprises of chemical industry most technological processes occur with the help of chemically active and radioactive substances. One of the main requirements to the applied machines and apparatus construction is the need of their hermetic fabrication in order to eliminate harmful substances penetration into...
Mechanical condition of working surfaces of collectors and slip rings is one of the most important integral indices characterizing electrical machine quality, their separate units and parts. At collector profile impairment in the shape of projecting and sinking down separate collector segments and their groups, faulty performance of operating collector surfaces and collector rings from cylindrical...
The paper reports on the results of theoretical and experimental investigations simulation model of electromechanic collector converter. It allows to calculate commutation processes in the machines whose sections contain up to 3 separate coils arbitrary placed in armature slots and inductor pole core may possess the given anisotropy of magnetic properties lengthwise and crosswise the main poles.
It was proposed to increase the number of diagnostic functions performed by automatic system of current diagnostics from two up to nine ones. Algorithms of diagnostic functions data and generalized algorithm of operation system of diagnosing technical condition of mechanical and electrical equipment of an electric drive of the tapped roller bed of the rolling mill have been elaborated and proposed...
One of problems worth in present time before organizations, giving services of telephone communication, is the shortage of copper pairs in urban cables. The overload existing fixed networks now is felt sharp enough, and became a tough problem. There are no cables incorporated on the project, if wires in cables are not enough, or some wires malfunctioning, or their characteristics have changed, etc...
The aim of the given paper is digital simulation of the process of particle intrusion into the lining at gravitational precipitation at small rate owing to thermal energy (accumulated at the cost of metal thermal capacity).
Technique is always influencing society in different ways. This influence is determined by social-economic conditions of the socium. The development of techniques and technologies is also powerfully influenced by economical, political and ideological institutions of the state which may stimulate science-technological progress or hinder it.
In this publication a new application of mechanism structure synthesis shows the basis of finding the variety of mechanical system kinematic couples based on introducing the concept of geometrical element link. It is justified that geometrical element links are the surfaces. Owing to evaluation of Gaussean curvature of the surface seven ordinary surfaces have been found of which based on their imposition...
Manufacturing details of any ferrous and non- ferrous alloys of complicated configuration possessing high quality is possible by casting according to smelted models (CSM).During the process of casting by smelted models with crystallization under pressure (CSMCP) filling cold CP is made at constant thermal conditions and hydrodynamic parameters for each detail. In the present paper the results of experimental...
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