Technical science and innovation最新文献

{"title":"THE NECESSITY OF UTILIZING INTERNAL BLADING AT STEEP-FALLING DEPOSITS","authors":"R. Naimova, S. Djuraev, K. Norova, B. Sytenkov","doi":"10.51346/TSTU-01.20.3-77-0084","DOIUrl":"https://doi.org/10.51346/TSTU-01.20.3-77-0084","url":null,"abstract":"The article discusses the necessity to form internal blades in deep steep falling deposits. The experience of formation and the scheme of blading of internal blades in open-cast mines with different mining and geological conditions is summarized. The prospective solution of formation of internal blades for deep quarry Muruntau is given and their prerequisites are defined","PeriodicalId":22199,"journal":{"name":"Technical science and innovation","volume":"130 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78548552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RESEARCH OF OPTOELECTRONIC VOLTAGE RELAY","authors":"E. Abduraimov, A. Rasulov, D. Khalmanov, N. Hamidova","doi":"10.51346/TSTU-01.20.3-77-0075","DOIUrl":"https://doi.org/10.51346/TSTU-01.20.3-77-0075","url":null,"abstract":"Article represents using theoretical analysis and experimental studies of nonlinear resistive circuits and it was developed that it is important to use such circuits as power contactless switching devices to ensure a quality power supply for consumers. The paper deals with the problems of designing lightweight, reliable, high-speed contactless optoelectronic voltage relays with extended service life, combining a responsive device and a strong executive body with a sinusoidal form of the load voltage curve. Theoretical studies of transients in nonlinear dynamic circuits result in the solution of differential condition equations by a computational method built on the basis of optoelectronic pressure relays with time delay. Experimental investigations and the operating theory of this relay are addressed.","PeriodicalId":22199,"journal":{"name":"Technical science and innovation","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73883220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MODIFICATION OF COMPOSITION OF SALINITY INHIBITORS BASED ON ORGANOPHOSPHONATES AND ACRYLIC ACID","authors":"B. Kadirov, O. Kamilov, Y. Usmanova, H. Kadirov, Z. Davlatova, E. Cherkasova","doi":"10.51346/TSTU-01.20.3-77-0068","DOIUrl":"https://doi.org/10.51346/TSTU-01.20.3-77-0068","url":null,"abstract":"Chemical and mineralogical compositions of mineral deposits and acidic precipitations have been studied, and synergistically effective compositions of inhibitors of salt deposits have been selected based on -PO3H2 and COOH containing organic compounds. The article proposes a formulation of a mineral salts deposit inhibitor corresponding to regulatory indicators (not less than 90%) for the protection of municipal boiler houses and industrial equipment, comparative results of the industrial preparation Komperex-710. The obtained compositions were found to be effective inhibitors in concentrations of 8-12 mg/l in waters with calcium and magnesium chlorides Chimbaia, Turtkulia and Biruni with hardness of 7.9-9.6 mg.eq/l and in concentrations of 10-14 mg/l in waters with calcium and magnesium carbonates Nukus and Shukmanay","PeriodicalId":22199,"journal":{"name":"Technical science and innovation","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81384238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RESEARCH OF THE INFLUENCE OF TECHNOLOGICAL FACTORS ON THE STATE OF THE SIDES OF DEEP QUARRIES","authors":"D. Mahmudov, V. Kadirov, S. Karimov, Y. Hamraev","doi":"10.51346/TSTU-01.20.3-77-0079","DOIUrl":"https://doi.org/10.51346/TSTU-01.20.3-77-0079","url":null,"abstract":"The article considers the influencing technological factors of mining operations on the state of the quarry sides. In technological processes, the stability of the sides of rock and semi-rock rocks and the value of the angle of inclination of the sides is most affected by drilling and blasting operations. It is determined that effective technological schemes in the zone of residual deformations should be carried out taking into account the geological structure of the contour array. Changing the opening scheme is associated with the development system and mining mode. To ensure the safety of the sides of deep quarries, several variants of schemes, crevice formation in the contour zone and methods for controlling deformation processes are recommended.","PeriodicalId":22199,"journal":{"name":"Technical science and innovation","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88150194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RESEARCH OF THE STRESS-STRAIN STATE OF THE ROCK IN CONTACT WITH THE ELEMENTS OF THE DRILL BIT DURING DRILLING","authors":"L. Toshniyozov, J. Toshov, Liu Songyong","doi":"10.51346/TSTU-01.20.3-77-0081","DOIUrl":"https://doi.org/10.51346/TSTU-01.20.3-77-0081","url":null,"abstract":"Research of the interaction of rock-cutting tools with rock with various approaches is presented in the article. In contrast to analytical and experimental methods with their limited and costly applicability, it is proposed to use numerical modeling to better represent the mechanics of rock destruction, to visualize the stages of destruction in a short time and in a cheaper way. This article allows to get an idea that using the finite element method can get mathematical modeling of plastic deformation, assess the stress-strain state of the bit and optimize the structural elements and working conditions of the rock cutting tool, analyze the dynamics of fracture forces and others. The dynamic interaction of the drill bit with the rock in case of two cones with different arrangement of buttons on one crown is investigated. In the process of analysis, it was found that the interaction of paired buttons with rocks has a force action on the area of the rock as well as the cone of the industry bit, but in a more intensively fluctuating way, by also saving energy. Advantageously, the arrangement of the buttons in pairs has not only tensile stress in the longitudinal direction, but also in the transverse direction, contributing to a wide coverage of the fracture zone","PeriodicalId":22199,"journal":{"name":"Technical science and innovation","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84378665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ASKUG SYSTEM - INTEGRATION OF \"GREEN TECHNOLOGIES\" IN THE PROCESS OF EFFECTIVE MANAGEMENT OF NATURAL RESOURCES","authors":"M. Musaev, S. Khojaeva","doi":"10.51346/TSTU-01.20.3-77-0065","DOIUrl":"https://doi.org/10.51346/TSTU-01.20.3-77-0065","url":null,"abstract":"The article presents the results of a study to reduce greenhouse gases through the introduction of green technologies. Different countries are making rather tough decisions to reduce greenhouse gas emissions. The basics of environmental protection and conservation of natural resources are considered, the problems of green technology are analyzed. Uzbekistan has not yet taken tough measures to reduce greenhouse gases. But there are positive trends due to the introduction of green technology to reduce emissions. Also, green technology is being introduced into the gas transportation system, which will lead to the saving of natural resources. The ASKUG system for gas transportation was selected as a green technology, the results are shown before and after the implementation of ASKUG to reduce greenhouse gases","PeriodicalId":22199,"journal":{"name":"Technical science and innovation","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81292301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DEVELOPMENT OF THE OPTIMAL DESIGN OF A CYCLONE APPARATUS WITH A FLUIDIZED BED FOR THE PROCESS OF METALS PNEUMATIC SEPARATION IN THE COMPOSITION OF INDUSTRIAL WASTE","authors":"N. Yusupbekov, B. Yunusov, S. Gulyamov, I. Yunusov, F. Kasimov","doi":"10.51346/TSTU-01.20.3-77-0077","DOIUrl":"https://doi.org/10.51346/TSTU-01.20.3-77-0077","url":null,"abstract":"Recycling of techno genic waste accumulated in recent years in Uzbekistan is currently a pressing problem. In this regard, this paper examines the issue of studying the process of enrichment of man-made waste in a cyclone with a fluidized bed. To conduct the experiment on experimental advanced devices with extended zones five types of samples of techno genic waste with the limits of 0.072÷0.078mm, 0.064÷0.070mm, 0.057÷0.063mm, 0.046÷0.055mm and 0.041÷0.044mm have been prepared. Nomograms have been obtained using mathematical models to determine particle size limits, which ensure good separation. Experiments have been carried out on the separation of techno genic waste in three structures of a cyclone with a fluidized bed: cylindrical, cylindrical with one extended zone and cylindrical with two extended zones. The best results are obtained in a fluidized bed machine with one extended zone. The following results were obtained for a sample with a 0.041÷0.044 mm limit size: the number of Mo increased 40 times, Ag increased 20 times, Mn increased 2.5 times, Cu increased 1 time, Ti increased 6.6 times, Ni decreased 125 times and the number of Si in the selected sample decreased from 20% to 12%.","PeriodicalId":22199,"journal":{"name":"Technical science and innovation","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85810097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"INCREASING THE ROUGHNESS OF THE PROCEDURE FOR EVALUATING A VECTOR OF THE CONDITION OF OBJECTS TO THE INFLUENCE OF UNCERTAINTY FACTORS","authors":"U. Mamirov","doi":"10.51346/TSTU-01.20.3-77-0072","DOIUrl":"https://doi.org/10.51346/TSTU-01.20.3-77-0072","url":null,"abstract":"Algorithms for increasing the roughness of the procedure for assessing the state vector of control objects to the influence of uncertainty factors are given. Expressions are obtained for extended state vectors and observations. Stable inversion algorithms are given for a nondegenerate block matrix with the allocation of its left and right zero divisors of maximum rank. The presented stable computational procedures allow us to regularize the problem of synthesis of algorithms for estimating the parameters of regulators in adaptive control systems with a customizable model and to improve the quality indicators of control processes under conditions of parametric uncertainty","PeriodicalId":22199,"journal":{"name":"Technical science and innovation","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84605879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"THE WAYS OF RATIONAL USE OF COOLING TOWERS","authors":"D. Muhiddinov, S. Sanayev, B. Boliyev","doi":"10.51346/TSTU-01.20.3-77-0070","DOIUrl":"https://doi.org/10.51346/TSTU-01.20.3-77-0070","url":null,"abstract":"In order to improve the economic performance of the company, the establishment of rational water use schemes and the reduction of the use of fresh water obtained from water supply systems or natural bodies of water can become an important factor. Water-cooling circulating systems, where cooling towers are used as cooling facilities, are the basis of rational water use systems. In water recycling systems that need stable water cooling at high specific hydraulic and thermal loads, cooling towers are used. By spraying water with nozzles or irrigation devices, the surface of water needed to cool it by contact with air is formed. A cooling tower is a heat exchange device for removing heat from various production processes to the environment by evaporating part of the water passing through it. The share of evaporated water usually does not exceed 1.5 %. Most of the cooling towers used were built 30 - 50 years ago. Almost all of these installations are morally and physically outdated. To consider the main criteria that should be guided with the choice of method for reconstruction of cooling towers to increase the efficiency and effectiveness of their operation.","PeriodicalId":22199,"journal":{"name":"Technical science and innovation","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85016123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"STUDY ON THE GRINDING TIME DURATION IMPACT ON THE PROPERTIES OF PAPER FROM ALTERNATIVE RAW MATERIALS","authors":"Z. Galimova, H. Babakhanova, M. Abdunazarov, I. Ismoilov, M. Mikhaleva","doi":"10.51346/TSTU-01.20.3-77-0067","DOIUrl":"https://doi.org/10.51346/TSTU-01.20.3-77-0067","url":null,"abstract":"Both raw and recycled fiber materials are used for paper production. The increase in percentage use of the latter is due to their paper-forming properties, availability and low cost. The article explores the possibility of using pulp from the inner layer of mulberry twig bark. Mulberry twigs, after removing leaves, which are the main raw material in silk production, have no practical industrial application. Recycling waste - mulberry branches - for the production of pulp is therefore relevant as it is aimed at solving raw material and environmental problems. The purpose of this work is to use local raw materials for paper production, study the impact of processing method of the grinding process on paper forming properties. During grinding the mechanical processes of changes of fibers determine mainly structure of a paper sheet, and colloidal-physical processes - bind and ability of fibers to form strong, homogenous and smooth structure of paper. The structure of the sheet of paper facilitates excessive or \"selective\" ink absorption into the pores of the paper and thus predetermines the quality of reproduction during the printing process. Methods for determining the physical and mechanical properties of papers were used in this work, and changes in the surface structure of samples cast at various technological modes of the milling process were studied. The results of the study revealed that the addition of cellulose mass from the inner layer of mulberry twig bark helps to obtain a strong paper. The optical properties of the paper, which contains cotton and cellulose from the inner layer of mulberry branch bark, are explained by the whiteness of the added fibers themselves. The strength properties of the paper at a weight grinding degree of 300 CWR are explained by the bond between the split and strongly interwoven fibers of the cellulose fibers. It has been established that the addition of more than 30% cellulose from the inner layer of the mulberry branch bark to the paper pulp mass is undesirable, as this adversely affects the whiteness of the paper","PeriodicalId":22199,"journal":{"name":"Technical science and innovation","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84850006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}