Vol. 2 No. 12 (2020)

The main ways to increase the durability of the working parts of the stamping tool are considered, including the processes of cold plastic deformation during the application of wear-resistant coatings by ion-plasma spraying. A physical model of the process of cold plastic deformation of samples from heat-resistant steel X12M is presented.

The common form of interference is random additive noise, which is statistically independent of the video signal. The additive noise model is used when the signal at the output of the imaging system or at some intermediate conversion stage can be considered as the sum of the useful signal and some random signal (noise). The additive noise model describes well the action of film grain, fluctuation noise in radio systems, quantization noise in analog-to-digital converters, etc. [10, p.23-24 ].

The article describes some of the problems of volumetric spatial  solutions of streets and public buildings in the system of urban planning.

In this study, the basic thermoelectric properties of granulated silicon with alkali metal atoms were studies in the process of temperature change. When analyzing the changes in the Seebeck coefficient  (a), electrical conductivity  (s) and thermal conductivity (c) under the influence of temperature, which are the main thermoelectric parameters.

This article discusses the system of technical regulation in our country in the field of building materials production and its efficiency, coordinate state policy in the sphere of state (international) standards, increasing the competitiveness of enterprises through the introduction of international standards, planning processes, introduction of modern international standards, key challenges, prospects of implementation of national and international standards.

The article examines the features of electronic document management of technical documentation of railway automation and telemechanics. The article deals with the problems of synthesis of mathematical description of electronic document flow of technical documentation of railway automation and telemechanics. For this purpose, a survey of the actual processes of creating, checking and using technical documentation was performed on the example of maintaining custom specifications for automation and telemechanics systems, which allowed us to identify document flow scenarios, as well as protocols for the properties of technical documents. The method of creating a model of electronic document flow of technical documentation based on the graph theory apparatus is developed. To set the matrix form of document flow representation, it is proposed to use a set of flat rectangular matrices, each of which represents the state of the system in some discrete unit of time. The resulting incident matrices determine the graph model of the document flow of the process under consideration, and the set of these matrices sets all possible scenarios for the movement of documents in the process, describes all possible document States, and determines possible participants. The use of the proposed method for constructing a mathematical model based on graph theory allows us to develop reliable application software for solving problems of operational document management of technical documentation.

The article developed frequency converters with increased efficiency for industrial enterprises. The principle of operation of existing methods and circuits of frequency converters has been studied and a schematic diagram of a highly efficient coefficient of a frequency converter has been developed.

Analyzes switching currents in power switches of frequency converters, energy losses associated with switching, losses associated with output rectifiers, improves analysis of the main power consumption in a switching power supply, high-frequency variable frequency control system efficiency, high power dissipation and high timing diagram for automated systems explaining the principle of operation of frequency variables with a useful operating coefficient, a new block diagram of improved frequency variables were developed, the circuit was changed, and an increase in efficiency was achieved.

The article deals with the issues of technogenic (anthropogenic) impact of industrial enterprises, quarries and agricultural land of the Almalyk region on the environment.

As a result of the infiltration of polluted water from waste dumps, slag and tailing dumps of factories, as well as irrigated lands, the penetration of polluting components into the groundwater occurs. The lithological protection of groundwater from the penetration of polluted waters in territories with different geological and geomorphological conditions is considered.

This article discusses the creative work carried out in our country in recent years, changes in urban development, the effectiveness of international cooperation in the field of construction and new buildings and structures being restored. The results of new technologies used in architecture and urban planning are explained.

In this research paper, on the basis of the graphical method, the determination of the acoustic parameters of the room, the focusing points of the reflected sound waves is considered, an assessment is made of the compliance of the hall under the Senate of the Republic of Uzbekistan with the design standards and requirements of architectural acoustics, and recommendations are given for eliminating unfavorable acoustic defects.

The article considers the tasks of developing and improving the technology of grinding mosaic floor coverings using surfactants.