The article discusses the technological capabilities of application of vibratory mechanical hard lubricant coatings on the basis of MоS2 to improve the surface quality and operational properties of parts made of aluminum with an oxide coating.

Keywords: vibration treatment, the vibration mechano-chemical coating of solid lubricant, combined methods of treatment

The loops of the dielectric hysteresis of a soft ceramics based on PZT with Curie temperature TC=210℃ are investigated. The studies were carried out at a frequency of 50 Hz in two modes. In the first of them, the field was switched on by 0.07 seconds, in the second - it operated continuously. The amplitude of the field E_m varied from 2.5 to 25 kV / cm and switched stepwise with an interval of 15 minutes. The coercive field EC and the switchable polarization P_m were determined. The switching polarity in the saturation region turns out to be no more, in contrast to BaTiO3 and other materials, but less than the corresponding values obtained with short-term switching.

Keywords: piezoceramics, piezoelectric material, hot pressing, dielectric hysteresis

In this paper, samples containing gold nanoparticles (NPs) distributed in different optically transparent media have been synthesized and characterized. A liquid (aqueous) and a solid (porous silicate glass and polymer (polyvinylpyrrolidone)) media were used. The samples obtained were characterized by optical spectroscopy and electron microscopy. The position of plasmon resonance band was analyzed depending on the dielectric constant of the medium.

Keywords: gold nanoparticles, colloidal solution, polymer, porous glass

The present work relates to the topic of green chemistry and technology of inorganic substances. In particular, it is devoted to the development of new materials for the reagent treatment of natural and waste water. The authors developed a technology for manufacturing composite materials - flocculants-coagulants on aluminum-silicon and iron-silicon base. Based on these reagents, methods were proposed for purifying natural waters, industrial wastewater and storm sewage. The authors have developed and patented a technology for producing flocculants-coagulants of this type in solid form. When creating these composites, matrix isolation methods of existing active components were used. The experimental evaluation of the effectiveness of the developed flocculants-coagulants ASFC and IFSC on real natural water and industrial wastewater is carried out. Their comparison with known analogs produced by industry is made.

Keywords: composite flocculants-coagulants; water treatment agents; aluminum-silicon and flocculants-coagulants; iron-silicon flocculants-coagulants; matrix isolation

The short analysis the direct-current motor running with the help of regulating resistors and thermostatic resistors is made. A fixed range of thermistor resistors can be obtained by optimizing the current. There are some graphical dependence of the load moment influences on the engine acceleration through the semiconductor rheostat. The authors give some warning to combine starting rheostats.

Keywords: thermistor, starting rheostat, direct-current motor, motor starting current line graph, combined starting resistance

The article first developed and proposed criterion values for 11 basic and 8 additional parameters of LED lighting devices intended for a comprehensive analysis of their quality. Of these, 10 parameters are essentially new.

Keywords: parameter, criterion value, quality control, main parameter, additional parameter, non-standard parameter

This article is devoted to the review of production methods for determining the rigidity of technological systems based on metal cutting machines. A description of each method, its characteristics, describes the principle of the appearance of elastic strains of technological systems and the possibility of their measurement. For each method, the limits of its applicability and the possibility of using it in different production situations are given. The mathematical dependences are given which can allow the process engineer to estimate the value of the elastic deformations of the technological system and make appropriate adjustments even at the stage of production preparation (for example, to change the trajectory of the tool when writing the control program for CNC machines). A statistical method for determining the rigidity of technological systems is described, the graphical dependence of elastic deformations on cutting forces is given.

Keywords: Rigidity of the technological system, elastic deformation, technological system, cutting force, production method for determining rigidity

Overhead contact system is a part of electric traction network which doesn’t have safety margin of a construction that’s why its using in winter becomes much difficult. The most heavy overhead contact system work is the operating regime in wind and ice loading because of wind and increasing not only on wires and suspension strands but on supporting structures. Ice loading on wires makes current-collecting conditions much worse and taking into account operational factors it can be a cause of a traffic accident and trains stop. The authors examine some methods of ice prevention, their efficiency effect and the capacity of their combining. In connection with this it is very important to trace ice load as early as possible. Equipment set for thermodynamic method instantiation and its fixing variant are represented.

Keywords: traction power system, overhead contact system, contact wire line, ice loading, loading, testing methods

In the article we have considered the actual problem of determining the error in visualization of generalized control criteria. It is indicated that the most common nonlinear interaction of parameters in technical systems is the multiplicative interaction of measured physical quantities. Based on the fact that the physical elements of the processor measuring channel have linear dynamic characteristics, it is concluded that the application of nonlinear transformations for quantitative estimates of the properties of monitoring systems requires linearization, the errors of which undoubtedly affect the accuracy of the final mathematical model and its magnitude may be is estimated and attributed to the methodological error of visualization. The process of linearization is considered for the example of the multiplicative interaction P of measured physical quantities. As a result of the analysis of the properties of many industrial control objects under the conditions of steady-state technological processes, it was found that they are characterized by small fluctuations with respect to the mathematical expectation (no more than 10%), which makes it possible to apply the obtained mathematical models of errors arising in the process of linearizing the measurement equations for control criteria, for design and research works.

Keywords: control objects, measuring system, programmable logic controllers, visualization error, mathematical expectation, adaptive control, linearized measurement equation, measurement error

The paper contains an analysis of the results of experiments on obtaining radiative structures based on gallium antimonide, formed by the method of thermal melt migration in a semiconductor matrix. The epitaxial process modes within the selected range were optimized for such parameters as the wavelength corresponding to the fundamental transition, a small lattice discrepancy, a small discrepancy in the coefficients of thermal expansion of the growing TP and the matrix. An original effect is described - an increase in the solubility of the Bi content in solid solutions, isoperiodic binary compounds A3B5 under conditions of a gradient temperature field. This effect allows a wide variation in the optical parameters of the element base of instruments based on solid solutions of GaSbBi / GaSb. The mechanisms of the generation of dislocations in a crystallized solid solution and the features of electrophysical and photoelectric parameters are analyzed. A structural solution of a light-emitting diode with strip geometry is proposed.

Keywords: thermomigration, solid solutions, gradient epitaxy, diode with fine mes, gallium antimonide, fundamental transition, photoluminescence spectra

The article deals with the question of constructing an analytical model in assessing a person's functional state. It is indicated that for complex measurement problems it is advisable to use the principles of constructing measuring systems, formulated in terms of system functions using the fractal-categorical approach; the technique is applicable in the design and analysis of complex medical complexes, and the resulting system function of a complex medical complex is the basis for further analysis within the selected method; The structural-analytical method for constructing complex systems makes it possible, by analyzing the requirements and constraints of the system, to optimize the functions of transferring control actions, to build blocks, parts of the structure on their basis, and to optimize inter-unit communications. The approach described in the article to the process of hematological research makes it possible to analyze the adaptive response of the body's hematopoietic system to external influences of a different nature and intensity.

Keywords: structural and analytical method, information-measuring system, information flows, hematopoietic system, category diagram, functors, adaptation contour, bioinstrumental information-measuring system, control signal, measurements.

In this article the methods of diagnosing the patient's condition from biologically active points analyzed, special attention is paid to one of the main problems of contact diagnostic methods, namely, the reliability of diagnostics; the preferred method of measurement, associated with the change in the probe oscillation depending on the change in the load characteristics, is the self-oscillation method. The purpose of the research is to identify the load characteristics corresponding to the best diagnostic reliability. To achieve this goal, the maximum deviation of the established self-oscillator’s frequency is determined for various changes in the load characteristics determined by biologically active points. It considered about the influence of the deviation of the established self-oscillator’s frequency on the reliability of the diagnosis. The result showed that the change in capacitance could be more informative than the change in resistance, which is due to the large value of the dynamic range of the frequency variation of the self-oscillator.

Keywords: self-oscillation method, diagnostics on bio-active points, the established self-oscillator’s frequency, oscillatory circuit, dynamic range, reliability of diagnostics

In operation analytical expressions of amplitude of sound pressure for spherical absorbers as a result of influence of a laser radiation in liquid in a distant field are received. The thermooptoacoustic effect leads to excitation of acoustic waves in case of absorption of a variable luminous flux. It is shown that the optoacoustic effects watched in the liquid environments are beyond the osnovopolakgayushchikh of the developed models for the ideal environments and require more detailed reviewing and specification.

Keywords: optoacoustics, optoacoustic waves, bioliquid, cylindrical, spherical absorbers

In accordance with the requirements of the legislation of the Russian Federation on the basis of a complex of pros-pecting works, it is necessary to establish the rate of removal of the soil layer. The thickness of the removal of the soil layer is established on the basis of a complex of laboratory studies of soil samples taken from established soil hori-zons. The thickness of the soil horizons is currently determined using stock data based on the characteristic type of soil. However, the thickness of soil horizons in a number of cases on sections characterized by identical soil characteris-tics differ. Thus, in each specific case it is necessary to link the soil sections and boundaries of the selected soil con-tours instrumentally through ecological excavations. High saturation with soil workings can lead to a significant distur-bance of the soil cover of the surveyed area. To solve the above problem, it is proposed to use a unit for studying the power of multicomponent dynamical systems for vertical drilling of soil wells

Keywords: soil horizon, fertile layer, survey, withdrawal power, prospecting, well, drilling, capital construction, photographic fixation, deposition

The paper presents the development of a system for detecting the status of control and protection system drives (CPS) of a water-water power reactor by vibration signals using the frequency components method. Results of experimental researches at the "Izhorskiy Plant" PO are given. Spectral analysis is used to isolate the frequency ranges of the CPS diagnostic signal spectra, and to develop diagnostic standards. The work describes formation of reference diagnostic vectors (a set of diagnostic features in the form of a binary code) and their comparison with the current state. The developed standards formed the basis for the system of automatic recognition of the object state. The introduction of such a system will simplify the task of collecting, analyzing, comparing drives data during operation at nuclear power plants, as well as improving methods of testing and diagnosing CPS drives, which should positively affect the reliability and resource of equipment.

Keywords: CPS drive, technical diagnostics, spectral analysis, diagnostic vector, state recognition

The paper proposes a method for determining the leakage in the gate of an electric drive armature by sound and ultrasonic signals using the Shannon and approximation entropy indices. The results of equipment diagnostics in laboratory and industrial conditions are presented. The results indicate the possibility of using entropy indicators as sensitive diagnostic features.

Keywords: electric drive armature, ultrasonic diagnostics, Shannon entropy, approximation entropy

The development of electrochemical impedance spectroscopy method in the field of high-frequency signals is proposed using an amplitude-phase approach to analyze the parameters of various biological sensors. Unlike the standard high-frequency analog electrochemical impedance spectroscopy systems interfaces based on quadrature demodulation, the use of peak and phase detectors allows improving the basic metrological parameters, as well as simplifying the analog interface with a wide bandwidth of the biological sensor interrogation signal. The circuit design of the phase detector, as part of the general system, is considered on the components of the technological process TSMC 0.35um SiGe. The key feature of this block is the maximum speed due to the rejection of feedbacks. A large range of output voltages and a low speed of their change allow the use of standard analog input modules for inputting phase detector signals to a computer for subsequent digital processing. The final accuracy of biological sensor signal phase detection is maintained at an acceptable level due to the introduction of additional elements in the basic circuit and the digital algorithms presented in the work. The shown variant of carrying out the correction has immunity to nonlinearities of the output characteristic of phase detection for large phase deviations of the signal of the biological sensor. The process technology used in the design is classified as economical, which makes it possible to potentially reduce the electrochemical impedance spectroscopy systems cost of production and introduction of a mass application.

Keywords: biological sensor; impedance spectroscopy; phase detector; quadrature representation of a signal, digital correction, algorithm of data processing, SiGe-technology, system on chip, microwave range, analog interface

Methods based on the thermo-optoacoustic effect in a liquid for conducting biomedical research are considered in the work. The mechanisms participating in the formation of the optoacoustic signal are considered. Thermo-opoacoustic effect leads to the excitation of ultrasonic waves when absorbing a variable light flux. Numerical methods for calculating the optoacoustic effect that can be applied to energy calculations and conditions of a source with arbitrary geometry, to the construction of a temporal profile of laser radiation, to linear scanning of a laser source and tomography are considered.

Keywords: optoacoustics, optoacoustic waves, biofluids, spherical sources, absorption.

The method of calculation gamma percentage fatigue resource of an arrow shovel excavator. Using this method can most accurately determine the distribution of the extreme members of samples and the corresponding shifts of the Weibull distribution. It was found that to calculate the shifts do not have, you can use only the extreme members of samples.

Keywords: reliability, probability, resource, sample, excavator

The assessment of the effect of copper content in natural water on human health in the water intake areas of the city of Taganrog is considered. The assessment uses the data of hydrochemical monitoring for 2006-2016, examines the dynamics of changes in copper concentrations in water and bottom sediments, the effect of both deficiency and excess element in the body on human health. A comparative analysis of the dependence of the mortality of the population due to cardiovascular diseases on the concentration of copper in natural water is carried out.

Keywords: water quality, MPC, UKIZV, copper, health, cardiovascular diseases, mortality

In this paper, we evaluate the water meters available on the market, their advantages and disadvantages are given. The classification of water meters and the assessment of their specific application are given. The main problem at the moment in measuring the flow of water resources is the accuracy of measurement on all flow ranges without a significant increase in the price for the retail sale of the meter. It is shown that the most problematic zone of the range is the minimum and drop rate. The second most important is the maximum flow rate and the accompanying hydraulic shock (in the case when the transition time from zero flow to maximum is negligible). The paper noted that at the moment there are no accounting devices on the market that solve both problems described. It is also shown that it is possible to make the meter more attractive to the consumer with the help of additional (not metrological functions). For example, an important function is the signaling of long-term leaks in the system.

Keywords: water meter, counter, measuring vane, acoustic

This paper provides an overview of the types of existing natural gas consumption meters. A comparison is made of the instruments of various manufacturers present on the market. The main characteristics of the counters are named, the definitions for each characteristic are given. The problem of temperature compensation of flow rate depending on the temperature of the working medium is considered. The error in measuring gas at temperature differences leads to difficulties in predicting the consumption of energy resources. Two existing approaches to the solution of the problem are given. The ways of solution for the task of including metering devices in unified automated energy accounting systems are also shown.

Keywords: flowmeters of natural gas, diaphragm counters, automated metering systems, energy resources, thermal correction

An overview of the basic schemes, characteristics, and directions of development of microwave photonics systems is presented in this paper in terms of requirements defining the parameters of external amplitude-phase modulation of laser radiation as a key process for the formation of radio frequency signals in the optical range for systems with polarization multiplexing of polyharmonic signals.

Keywords: microwave photonics; external amplitude and phase modulation, optical generation of radio frequency signals; generation of poly-harmonic optical signals with microwave frequency components

microwave photonics; external amplitude and phase modulation, optical generation of radio frequency signals; generation of poly-harmonic optical signals with microwave frequency components

Keywords: microwave photonics; external amplitude and phase modulation, optical generation of radio frequency signals; generation of poly-harmonic optical signals with microwave frequency components