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Articles 1 - 30 of 99
Full-Text Articles in Engineering
Research Of Physical And Mechanical Properties Of Babbits Filled In Sliding Bearings, K G. Gaparov
Research Of Physical And Mechanical Properties Of Babbits Filled In Sliding Bearings, K G. Gaparov
Scientific-technical journal
The article presents the results of research of physical and mechanical properties of babbites prepared from scrap and wastes poured into sliding bearings. The development of the technology of recycling scrap and babbites waste is aimed at optimizing the parameters of the technology of cleaning and melting babbites for reuse of so-called secondary babbites.
Method And Methods For Determining Shapes And Sizes Of Solar Dryer Elements, Sh M. Mirzaev, J R. Kodirov, S S. Ibragimov
Method And Methods For Determining Shapes And Sizes Of Solar Dryer Elements, Sh M. Mirzaev, J R. Kodirov, S S. Ibragimov
Scientific-technical journal
This article presents the calculation of the drying plant, the shape of which is a parallelepiped with non-isosceles triangular bases. Concepts were selected, on the basis of which a computational computational method was developed and the geometric dimensions of the elements of a direct type dryer were determined. The formula for the ratio of the dimensions of the height to the length and, accordingly, to the width of the dryer has been established, and a method has been developed for determining the dimensions of the dampers intended for the flow of air from the environment into the chamber and for …
Estimation Of The Service Life Of Span Structures In Predicting The Durability Of Reinforced Concrete Bridges, Sh.B. Akhmedov, Kh. Almenov, Sh.Sh. Shojalilov, Sh.Sh. Safarov
Estimation Of The Service Life Of Span Structures In Predicting The Durability Of Reinforced Concrete Bridges, Sh.B. Akhmedov, Kh. Almenov, Sh.Sh. Shojalilov, Sh.Sh. Safarov
The Scientific Journal of Vehicles and Roads
In recent years, on the roads of Uzbekistan and other countries, there has been a dangerous increase in various damages in the operated superstructures, caused by an increase in the service life and traffic intensity of vehicles and cargo tension.
Indicators Of Determining The Productivity Of Motor Graders Under Natural Conditions, N.R. Aslonov, S.S. Yusubjonov, S.M. Mirkholiqov
Indicators Of Determining The Productivity Of Motor Graders Under Natural Conditions, N.R. Aslonov, S.S. Yusubjonov, S.M. Mirkholiqov
The Scientific Journal of Vehicles and Roads
In the article, Motor Graders are self-propelled machines that level and shape the ground, and their equipment consists of a fully rotating blade overturner, located between the rear and front bridges of the pneumatic wheel drive.
Evaluation Of Reliability Indicators Of A Transformer Angular Displacement Transducer, S.F. Amirov, M.S. Yakubov, N.R. Yuldashev
Evaluation Of Reliability Indicators Of A Transformer Angular Displacement Transducer, S.F. Amirov, M.S. Yakubov, N.R. Yuldashev
The Scientific Journal of Vehicles and Roads
Based on the analysis of statistical data on the state of transformer angular displacement transducers, the following calculations of probabilistic reliability indicators were performed: failure rate, mean time to failure; the probability of failure-free operation with a sufficiently long operation and gamma-percentage resource; confidence upper and lower bounds are determined, under the chosen conditions of significance, the calculated values satisfy Pearson's χ^2 criterion and therefore do not contradict the experimental data. By analyzing the selected levels of significance, the existence of exponential and normal laws in the laws of probability distribution was revealed.
Warranty And Post-Warranty Service For Vehicles, U.A. Nurullayev, D.M. Zukhurova
Warranty And Post-Warranty Service For Vehicles, U.A. Nurullayev, D.M. Zukhurova
The Scientific Journal of Vehicles and Roads
This article examines the characteristics of warranty and post-warranty service, the specifics of the work to identify problems and take into account the prospects of warranty and post-warranty service development, and compares warranty and post-warranty service before and after equipment purchase.
Processing Of The Results Of Comparisons Of Verification Installations Of The Same Level Of Accuracy, A. Abdukayumov
Processing Of The Results Of Comparisons Of Verification Installations Of The Same Level Of Accuracy, A. Abdukayumov
The Scientific Journal of Vehicles and Roads
Methods of processing the results of comparisons of verification installations of the same level of accuracy on the example of frequency and time standards are considered. A comparative analysis of the methods used to compare the verification installations is performed. The conditions for confirming the metrological status (metrological characteristics) of the verification installations are noted. The method of comparison of verification installations of the same level of accuracy is proposed. The results of the study of the pairwise comparison of frequency and time standards, the difference of the arithmetic mean readings, estimates of the total variance, the arithmetic mean readings …
Method Of Determination Of Characteristics Of Crushed Rocks, B.Yе. Kosymbetov
Method Of Determination Of Characteristics Of Crushed Rocks, B.Yе. Kosymbetov
The Scientific Journal of Vehicles and Roads
The article describes the properties of heat resistance and frost resistance of a cone crusher when crushing rocks, and it is established that the transported stones have an abrasive effect on the cone crusher during crushing. Efficiency, of the crushing chamber, the composition of stones in the deposit, the percentage of their correct use of crushing power during construction work. The abrasive wear of the working bodies of the conical crushers was revealed.
Evaluation Of The Efficiency Of Vehicles And Refrigeration Equipment Transporting Perishable Goods, Q.U. Urinbayev
Evaluation Of The Efficiency Of Vehicles And Refrigeration Equipment Transporting Perishable Goods, Q.U. Urinbayev
The Scientific Journal of Vehicles and Roads
Today, the volume of exports and imports is growing, and the demand for food is growing as the world's population grows. Further improvement of the rules of transportation of goods by road, as well as improving the safety of transportation of perishable products is a very important issue. One of the vehicles designed to transport perishable goods in road transport is a refrigerator. Selecting the thickness of the panels for the refrigerator compartment of the refrigerator One of the main applications in rigid polyurethane foam is the use of turgon wall wall sandwich panels as a layer of thermal insulation …
Methods For Assessing The Efficiency Of Urban Public Transport, A.A. Nazarov
Methods For Assessing The Efficiency Of Urban Public Transport, A.A. Nazarov
The Scientific Journal of Vehicles and Roads
The article presents methods for assessing the effectiveness of urban public transport based on the analysis of the operational characteristics of their types. Methods for a comprehensive assessment of options for solving the urban public transport system are analyzed.
Mathematical Model Of The Efficiency Of Investments Aimed In The Implementation Of Water-Saving Technologies
Irrigation and Melioration
In Uzbekistan, research work is being carried out aimed at improving the economic mechanisms for the introduction of water-saving technologies for irrigating agricultural crops. At the same time, the issues related to the analysis of the effectiveness of the use of water-saving technologies when irrigating cotton, the development of mathematical methods for assessing the effectiveness of investments, as well as their introduction into practice have not been sufficiently studied. This article provides a mathematical model of the efficiency of investments aimed at introducing water-saving technologies. The results of a numerical experiment of a mathematical model show that the introduction of …
Efficient Use Of Water Resources In The Basins Of Small Rivers, F. Gapparov, M.F. Gafforova
Efficient Use Of Water Resources In The Basins Of Small Rivers, F. Gapparov, M.F. Gafforova
Irrigation and Melioration
The article provides a recommendation for the efficient use of water resources in the basins of small foothill rivers. The research was carried out on the example of the Govasay river basin located in the northern part of the Fergana Valley. The efficiency factor of the canal has been determined and a technical assessment has been given for the management of water resources in the river basin; the efficiency of the canal is 65-75%. A program for the operational management of water resources in The Govasay river basin and a GIS map of water consumers in the Govasay river basin …
Model Of Groundwater Level Control Using Horizontal Drainage, A. Arifjanov, M. Otaxonov, Z. Abdulkhaev
Model Of Groundwater Level Control Using Horizontal Drainage, A. Arifjanov, M. Otaxonov, Z. Abdulkhaev
Irrigation and Melioration
The article describes the main factors affecting the rise in the level of groundwater in the city of Fergana and ways to eliminate them. Currently, in order to reduce the negative impact of rising groundwater levels on the environment, crops, buildings and structures, as well as underground utilities, it is proposed to design horizontal drainage in urban areas and a mathematical model has been developed for changing the groundwater level. For this, long-term data from observation wells were analyzed and the hydraulic parameters of horizontal drainage were selected taking into account the hydrogeology of the area. Taking into account the …
Results Of Proximate Analysis Of Energy Use Of Municipal Solid Waste, N.N. Abduganiev
Results Of Proximate Analysis Of Energy Use Of Municipal Solid Waste, N.N. Abduganiev
Irrigation and Melioration
In the modern industrialized world, various raw materials are processed and used for human consumption. While some of the raw materials are converted into the desired product, the rest is thrown into the environment as waste. It is known that solid waste is a type of biomass that is formed in the course of human life. The article presents the results of a preliminary analysis of studies on the use of solid waste energy in the Urta-Chirchik district of the Tashkent region. Sorting results showed that the total volume of municipal solid waste in the district consists mainly of wood …
Shredding Of Cotton Stalks Under The Action Of Toothpicks In A Combined Unit, B. Khudayarov, U. Kuziev, B. Sarimsakov, М. Kholbutaev
Shredding Of Cotton Stalks Under The Action Of Toothpicks In A Combined Unit, B. Khudayarov, U. Kuziev, B. Sarimsakov, М. Kholbutaev
Irrigation and Melioration
The article presents materials devoted to the justification of the parameters of the crown-wheel of the combined aggreagate. The technological process of work and the design of the working part, which is crushed by crushing cotton stalks, without breaking them, laying them on the movement of the unit, has been substantiated and developed. The optimal parameters of the crown-wheel and the tooth are determined by solving the regression equations that determine the optimal values of the vertical load on the teeth and its working quality. The results of theoretical and experimental research show that the amount of crushing of cotton …
Influence Of Electrophysical Methods On The Processes Of Root Formation Of Grapes, N.M. Markayev
Influence Of Electrophysical Methods On The Processes Of Root Formation Of Grapes, N.M. Markayev
Irrigation and Melioration
The article describes the possibilities of electrophysical processing before planting cuttings during vegetative cultivation of grape seedlings. The processes of root formation in cuttings using the electrophysical method in the article Acceleration of the process of root formation in cuttings of black raisins, treated at 71 V/m and an electric field strength of 15 hours, and an increase in the viability, quality, growth and survival of rooted seedlings up to 16.67-34% Presented the results of experiments on the increase and methods of electrotechnological processing of grape cuttings. The result of the study is the analysis and results of the processes …
Conditions, Criteria And Principles For Creating An Agri-Cultural Land Market In Uzbekistan, A.R. Nurnazarov
Conditions, Criteria And Principles For Creating An Agri-Cultural Land Market In Uzbekistan, A.R. Nurnazarov
Irrigation and Melioration
The article analyzes the prerequisites for creating a market for agricultural land in the Republic of Uzbekistan, special attention is paid to land reform, land degradation (reduction of the bonitet score from 60 in 1991 to 50 or more at present, pasture degradation by 20-30%) and increase in economic from their use, the role of land rent in payments for land. 6 basic principles for creating a land market have been established and systematized, the relationship between X-rays and water in the irrigated farming zone, the role of the market in increasing the efficiency and effectiveness of the use of …
Economic Assessment Of The Effect Of Family Income On Students' Disciplines, Sh.A. Muratov
Economic Assessment Of The Effect Of Family Income On Students' Disciplines, Sh.A. Muratov
Irrigation and Melioration
The importance of higher education in scientific research, its role in poverty reduction and population growth has been studied theoretically. Also, when using the data of social surveys conducted by 538 respondents (students) studying in higher education institutions, they were awarded the Order of the logistics regulator in the economic assessment of the factors influencing the rate of mastery of disciplines. Factors influencing the acquisition of subjects by students: the main income of the family comes from non-farm (69,9 %), sex (52,2 %), studying at a higher education institution on a state grant (108,8 %), the student's course of study …
Innovative Rotor Casing And Leveling Apron For Combined Tillage Machine, A.A. Akhmetov, L.B. Muratov
Innovative Rotor Casing And Leveling Apron For Combined Tillage Machine, A.A. Akhmetov, L.B. Muratov
Irrigation and Melioration
Investigations of the design of a combined machine equipped with an innovative casing and a leveler apron are presented, and the parameters of the leveler apron are substantiated. It was experimentally established that when the height of the drawing prism is exceeded by more than 200 mm, due to the falling of the crumbling part of the soil onto the rotor, the soil is thrown forward in the direction of the machine. Therefore, to eliminate soil waste, it is necessary either to reduce the height of the drag prism, or to increase the distance between the rotor and the leveling …
Ensuring The Uniformity Of Movement Of The Working Bodies Of The Machine For Processing Ridges In The Depth Of Travel, А. Tukhtakuziev, K.G. Abdulkhaev
Ensuring The Uniformity Of Movement Of The Working Bodies Of The Machine For Processing Ridges In The Depth Of Travel, А. Tukhtakuziev, K.G. Abdulkhaev
Irrigation and Melioration
The article theoretically investigates the issue of identifying ways to ensure the deepening of the working bodies of the machine for processing ridges to a given processing depth and its required uniformity of stroke. The research results show that the deepening of the working bodies of the ridges processing machine to a given processing depth and its required uniformity is provided mainly due to the correct choice of the vertical distance from its reference plane to the lower connection points. The novelty of the conducted research lies in the fact that an analytical dependence has been obtained that allows us …
Develepment Of Land Market In Eastern European Countries And Experience For Uzbekistan, A.R. Nurnazarov
Develepment Of Land Market In Eastern European Countries And Experience For Uzbekistan, A.R. Nurnazarov
Irrigation and Melioration
The article examines the experience of the formation of the agricultural land market in Eastern European countries since the 90 s of the twentieth century, the problems and features of its devel-opment, the impact of the land market on the economies of countries. Particular attention is paid to the transformation of land ownership, methods of land privatization, land pricing, restrictions on land purchase, regulation of land relations in market conditions, issues of granting the right to pur-chase land to foreign individuals and legal entities, requirements for land owners for the presence of a special agricultural education or 3-5 years of …
The Developmet Of Competences Via Techniques For Enhancing Esp (English For Specific Purposes) Vocabulary Of Learners, G. Eshchanova
The Developmet Of Competences Via Techniques For Enhancing Esp (English For Specific Purposes) Vocabulary Of Learners, G. Eshchanova
Irrigation and Melioration
In the article a recent trend in higher education is ESP (English for Specific Purposes) courses is discussed. These courses are designed around students’ needs based on their field of study. The goal is to strengthen students’ proficiency and help them to get ready to cope with everyday situations and deal with professionals in many fields such as: engineering, medicine, education and IT. There are many training sessions organized by international experts whose goal is to train local teachers to teach these courses successfully. In order to develop an ability to learn new vocabulary, for both general English and technical …
Development Of Girls’ Sports, A.R. Khodjanov, V.V. Mahmudov
Development Of Girls’ Sports, A.R. Khodjanov, V.V. Mahmudov
Irrigation and Melioration
The article addresses current issues of higher education, taking into account its specifics. She has been providing appropriate advice on improving girls' physical well-being. The use of opportunities and qualities has an impact on the creation of comfortable conditions for female athletes. For girls involved in sports, the creation of impressive quality and possible conditions is considered. As a result, the girls-athletes of our institute took 2-3 places in the district and city qualifying rounds of chess, table tennis and won a ticket to the republican stage. At the republican stage, 2 female students of our team took 4th place …
The Imrovement Of Esp Teaching Via Methodical Provision At Technical Institution: Specializm-Oriented English Via Agriculture, G. Eshchanova, U. Nullaev
The Imrovement Of Esp Teaching Via Methodical Provision At Technical Institution: Specializm-Oriented English Via Agriculture, G. Eshchanova, U. Nullaev
Irrigation and Melioration
In the given article the ways that ESP combines subject matter and English language teaching is discussed. This approach can be highly motivating for students because students are able to apply what they learn in their English classes to their main field of study, whether it be law, computing, business, tourism, etc. Being able to use the vocabulary and structures that they learn in a meaningful context reinforces what is taught and increases their motivation. Nevertheless, ESP concentrates more on language in context than on teaching grammar and language structures. Additionally, the ways of teaching English in ESL classes and …
Indicator Of Accident And Analysis Of Existing Problems Of Ensuring Traffic Safety In Major Cities Of Uzbekistan, Jamshid Abdunazarov
Indicator Of Accident And Analysis Of Existing Problems Of Ensuring Traffic Safety In Major Cities Of Uzbekistan, Jamshid Abdunazarov
Scientific-technical journal
This article is devoted to the analysis of accidents and road safety in large cities of the Republic of Uzbekistan such as Bukhara, Fergana and Samarkand. And also, statistical data of road traffic accidents are processed throughout the republic. Such factors as transport risk, social risk and severity of the consequences of a road traffic accident have been identified. In conclusion, the author's opinion on the factors affecting road safety in the republic is presented.
Development Of A Model For Control Of A Flexible Production Sewage System, Shalala Jafarova
Development Of A Model For Control Of A Flexible Production Sewage System, Shalala Jafarova
Scientific-technical journal
This article discusses the development of a production module management model for one area of the technological process. New modeling methods are used for this purpose. Mathematical modeling and research is one of the key issues in the early stages of designing automated and automated systems operating in uncertain or fuzzy environments. Efficient modeling devices are used to solve these problems, taking into account the specific features of the process. The article builds the management model of the production module and obtains the results.
Improving Noise Immunity And Efficiency Using High-Precision Iterative Codes, Sherzod Shukhratovich Atadjanov, Aziza Ahmadjanovna Tursunova
Improving Noise Immunity And Efficiency Using High-Precision Iterative Codes, Sherzod Shukhratovich Atadjanov, Aziza Ahmadjanovna Tursunova
Bulletin of TUIT: Management and Communication Technologies
The article discusses the issues of ensuring noise immunity in digital broadcasting systems, shows the importance of the transition to the optimal code and the need to use it in the field of noiseless coding in various areas of telecommunication transmission and reception of digital signals. The previous algorithms and error-correcting coding methods based on the Gray code, which are used in multi-level digital broadcast modulation schemes to minimize the intensity of bit errors, are highlighted. A model of error-correcting coding by the Gray method and methods for estimating the probability of error for the Gray code are presented. Based …
Research Of Hydrodynamic Processes When Drying Mineral Fertilizers In Drum Dryers, R J. Tojiyev, A A. Akhunbaev, R X. Mirsharipov
Research Of Hydrodynamic Processes When Drying Mineral Fertilizers In Drum Dryers, R J. Tojiyev, A A. Akhunbaev, R X. Mirsharipov
Scientific-technical journal
The article discusses the experimental kinetics of the process of thermal drying of dispersed materials. Experimental methods for determining the periods of drying and kinetics of the process have been studied.
Theoretical Bases Of Diagnostics Of Radiators By Heat Load Of Passenger Cars, U R. Salomov, D A. Moydinov, S M. Yusupov
Theoretical Bases Of Diagnostics Of Radiators By Heat Load Of Passenger Cars, U R. Salomov, D A. Moydinov, S M. Yusupov
Scientific-technical journal
This article presents the technical characteristics of the phenomena occurring in the radiator pipes under the influence of the thermal regime of mechanisms determined by the technical condition of the cooling system components of cars with internal combustion engines.
To The Formation Of A Computational Model Of The Cylindrical Part Of Shell Structures – Main Pipelines, A Abdusattorov, N B. Ruzieva
To The Formation Of A Computational Model Of The Cylindrical Part Of Shell Structures – Main Pipelines, A Abdusattorov, N B. Ruzieva
Scientific-technical journal
Models and methods of numerical calculation of elements of shell structures - main pipelines - are considered in the work. The refined equations of motion for cylindrical shell structures are obtained. To solve boundary value problems of thin-walled structures, the Bubnov-Galerkin method, finite differences using the sweep method is used. On the basis of the above algorithm, a program and implementation of solving the problems of a cylindrical shell has been developed.