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Articles 1 - 25 of 25
Full-Text Articles in Engineering
Calculation Of Temperature Field In Helioglass Poultryhouse Flat Wall Water Tank Heat Accumulator By Analytical And Numeral Methods, F A. Namazov, B E. Xayriddinov, D J. Nurmatova, I L. Nematov
Calculation Of Temperature Field In Helioglass Poultryhouse Flat Wall Water Tank Heat Accumulator By Analytical And Numeral Methods, F A. Namazov, B E. Xayriddinov, D J. Nurmatova, I L. Nematov
Scientific-technical journal
The article describes the changes in the temperature field in the construction of a flat-walled water tank heat accumulator in a helioglass poultryhouse, analytical and numerical methods, the results of experimental research on scientific and practical basis.
Theoretical Justification Of The Parameters Leveler Track Rippers, A Tuxtakuziyev, A O. Naurizbayev
Theoretical Justification Of The Parameters Leveler Track Rippers, A Tuxtakuziyev, A O. Naurizbayev
Scientific-technical journal
The article presents the results of research on obtaining analytical expressions that allow us to determine the rational values of the parameters (angles of installation of levelers to the direction of movement and solution, the width of the levelers, the gap between the levelers, the length of the levelers, the height of the levelers) of the levelers of the wide-span small leveler and the calculations performed on them.
Use Of Optical Amplifiers Doped With Rare Earth Elements In Focl, N I. Juraeva, D A. Davronbekov
Use Of Optical Amplifiers Doped With Rare Earth Elements In Focl, N I. Juraeva, D A. Davronbekov
Scientific-technical journal
The analysis of optical amplifiers is carried out, the principles of operation of fiber-optic amplifiers doped with rare earth ions and their parameters are considered.
To Calculate The Temperature Fields In The Substrate Layer Of The Submitted Heat Battery With Variable Thermophysical Coefficients At The Specified Temperature Regimes Of The Air In Heliotyhrane, B E. Khayriddinov, Sh B. Khayriddinov
To Calculate The Temperature Fields In The Substrate Layer Of The Submitted Heat Battery With Variable Thermophysical Coefficients At The Specified Temperature Regimes Of The Air In Heliotyhrane, B E. Khayriddinov, Sh B. Khayriddinov
Scientific-technical journal
An analytical method is proposed for solving problems of unsteady heat conduction with var-iable transport coefficients depending on the coordinate of the current point. The temperature fields in the substrate layer of the subsurface heat accumulator are studied with harmonic and exponential laws of air temperature vari-ation in greenhouses and livestock buildings
Analysis Of The Efficiency Of Heat Transfer Intensification In Flat Solar Air Heaters Taking Into Account Heat Recovery At Reynolds Numbers Re <2300., E. S. Abbasov, M A. Umurzakova
Analysis Of The Efficiency Of Heat Transfer Intensification In Flat Solar Air Heaters Taking Into Account Heat Recovery At Reynolds Numbers Re <2300., E. S. Abbasov, M A. Umurzakova
Scientific-technical journal
The article discusses the experimental results on the intensification of heat transfer in flat solar air heaters at Reynolds numbers Re
Principal Schema Of Optoelectronic Device For Monitoring The Concentration Hydrocarbons In Air With Exponential Scan, Yu Mamasadikov
Principal Schema Of Optoelectronic Device For Monitoring The Concentration Hydrocarbons In Air With Exponential Scan, Yu Mamasadikov
Scientific-technical journal
The article deals with the actual problem of controlling the concentration of hydrocarbons in the air. A schematic diagram of an optoelectronic device for monitoring the concentration of hydrocarbons in air on semiconductor emitting diodes is presented. The principle of operation of the principle diagram of an optoelectronic device for monitoring the concentration of hydrocarbons in air with an exponential sweep is stated.
Solar Air Heater With Breathable Matrix Absorber Made Of Metal Wire Tangle, Yu. K. Rashidov, J. T. Orzimatov
Solar Air Heater With Breathable Matrix Absorber Made Of Metal Wire Tangle, Yu. K. Rashidov, J. T. Orzimatov
Scientific-technical journal
In the article, a physical and mathematical thermal model of the operation of a solar air-heating collector with an air-permeable matrix absorber made of a metal wire tangle is developed, and analytical solutions of the model for boundary conditions of the first and second kind are obtained.
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 …
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.
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.
Algorithm Of The Estimation Of The Moving The Raw Cotton On Surfaces Of The Pallet Of The Mechanism Of The Presenting Ginning Machines, M Х. Aхmedov, T O. Tuychiev, A A. Ismoilov, Sh A. Xusanova
Algorithm Of The Estimation Of The Moving The Raw Cotton On Surfaces Of The Pallet Of The Mechanism Of The Presenting Ginning Machines, M Х. Aхmedov, T O. Tuychiev, A A. Ismoilov, Sh A. Xusanova
Scientific-technical journal
In article are brought algorithm of searching for parameter unceasing moving the raw cotton on surfaces of the pallet of the mechanism of the presenting ginning machines, management and provision rational parameter, as well as results called on numerically-experimental studies. The broughted results called on numerically-experimental studies on estimations of the dependencies of the corner , factor of friction, primary velocity and time for displacement centre raw cotton in feedersof saw gin.
Justification Of The Parameters Of The Working Body For Loosening The Furrows Between The Ridges, Xurshed Abdulkhayev
Justification Of The Parameters Of The Working Body For Loosening The Furrows Between The Ridges, Xurshed Abdulkhayev
Scientific-technical journal
The article presents the results of theoretical studies on the justification of the angles of crumbling and solution of the wings of the pointed paw of the developed machine for pre-sowing treatment of ridges, the angle of its entry into the soil and the width of the grip. At the same time, based on the conditions for ensuring high-quality loosening of the soil with minimal energy consumption, the sliding of plant residues and weeds along the blades of the wings of the pointed paw and the descent from them, analytical dependences are obtained to determine the angles of crumbling and …
Mathematical Model Of Power Flow In A Single-Phase Network Using Facts Devices Containing Static Power Flow Compensator Svc, Sh V. Khamidov, Bahrom Normuratov
Mathematical Model Of Power Flow In A Single-Phase Network Using Facts Devices Containing Static Power Flow Compensator Svc, Sh V. Khamidov, Bahrom Normuratov
Scientific-technical journal
The use of FACTS technology makes it possible to reduce the gap between controlled and uncontrolled modes of EPS operation, providing dispatching personnel with additional degrees of freedom in controlling power flows and voltages in excess and deficient areas of the electrical network. The unified approach used as an alternative combines the state variables of the EPS without controlled power equipment and the state variables describing the given controlled power equipment - the FACTS device - into a single set of states. In this case, the electrical network is described in a single coordinate system for the combined iterative solutions …
Development Of A Model For Analysis Of Traffic Accidents Taking Into Account The Level Of Automobilization And Population In The Republic Of Uzbekistan, Jamshid Abdunazarov
Development Of A Model For Analysis Of Traffic Accidents Taking Into Account The Level Of Automobilization And Population In The Republic Of Uzbekistan, Jamshid Abdunazarov
Scientific-technical journal
This article is devoted to the development of a model for the analysis of traffic accidents in the Republic of Uzbekistan, taking into account the level of motorization and population. And also, statistical data of a road traffic accident throughout the country is processed to determine the forecast of a possible accident rate using the model of prof. R. Smid. In conclusion, a comparison of the methods for predicting the fatalities in road accidents is provided.
Review And Analysis Of Methods For Measuring Concentration Of Suspended Substances And Active Sludge During Biological Treatment Of Waste Water, Maxsud Maxmudov, Siroj Nurov, Zafar Qo'ziev, Sanjar Sidiqov
Review And Analysis Of Methods For Measuring Concentration Of Suspended Substances And Active Sludge During Biological Treatment Of Waste Water, Maxsud Maxmudov, Siroj Nurov, Zafar Qo'ziev, Sanjar Sidiqov
Scientific-technical journal
This work analyzes and compares the measuring and technical characteristics of methods for measuring and controlling the parameters of activated sludge in the processes of biological wastewater treatment. As methods for measuring the concentration of activated sludge, methods such as the optical method, the ultrasonic method and the method for measuring the nuclear density of a liquid are considered. The principles of operation of each of these methods are illustrated with graphic drawings for more clarity of the interaction of the measuring signal with the particles of the measured medium. At the end of the work, conclusions on the characteristics …
Theoretical Principles Of Information Processing In A Multi-Dimensional Space Based On Neural Network Technology Using Multilayer Perseptrons, Orifjon Zaripov, Umid Hamrakulov Mr
Theoretical Principles Of Information Processing In A Multi-Dimensional Space Based On Neural Network Technology Using Multilayer Perseptrons, Orifjon Zaripov, Umid Hamrakulov Mr
Scientific-technical journal
The article discusses the theoretical principles of information processing in a multidimensional space based on neural network technology using multilayer perceptrons.
Experimental Research Of The Hydraulic System Of The Unloading Device Of Trailers, Hayrullo Rahimovich Baynazarov, A A. Shermukhamedov
Experimental Research Of The Hydraulic System Of The Unloading Device Of Trailers, Hayrullo Rahimovich Baynazarov, A A. Shermukhamedov
Scientific-technical journal
The article presents the results of an experimental research to substantiate the basic parameters of the unloading device of the trailers.
The Use Of Supercapacitors To Stabilize The Power Supply System Of The Base Station Of Mobile Communication, Dilmurod Abdujalilovich Davronbekov, Utkir Karimovich Matyokubov
The Use Of Supercapacitors To Stabilize The Power Supply System Of The Base Station Of Mobile Communication, Dilmurod Abdujalilovich Davronbekov, Utkir Karimovich Matyokubov
Scientific-technical journal
In this study, an analysis of the current status and available outages of the mobile communication base station power supply system was performed. The effects of these outages on the power supply system have been studied and it has been shown that batteries may not be an ideal solution as a backup source. Also, the issue of the introduction of renewable energy sources in the base station power supply system of the mobile communication system and its shortcomings are mentioned. In order to overcome these problems and stabilize the power changes in the battery auxiliary element and the power supply …
Influence Of Parameters Of Non-Standard Modes Of Heat Treatment On Increasing The Wear Resistance Of Steel Products, Dorob Murotovich Berdiyev Dsn, Abdulaziz Abdullajanovich Yusupov Head Teacher, Ravshan Kobilovich Tashmatov Doctoral Student, Tuychi Nemat Ogli Ibodullayev Assistant, Kabira Erkinovna Qurbonova Head Teacher
Influence Of Parameters Of Non-Standard Modes Of Heat Treatment On Increasing The Wear Resistance Of Steel Products, Dorob Murotovich Berdiyev Dsn, Abdulaziz Abdullajanovich Yusupov Head Teacher, Ravshan Kobilovich Tashmatov Doctoral Student, Tuychi Nemat Ogli Ibodullayev Assistant, Kabira Erkinovna Qurbonova Head Teacher
Scientific-technical journal
The use of non-standard modes of heat treatment increases the density of dislocations in the crystal structure of the α-phase and increases the wear resistance of carbon, low-alloy steels under various friction conditions, which is comparable to the results when heated to a standard temperature (Ac3+30÷50 °C). The preliminary extreme heating temperature is determined. After re-quenching at standard temperature and low tempering, the wear resistance of steels under various types of friction increases by up to 40 % compared to standard quenching.
The Use Of Supercapacitors To Stabilize The Power Supply System Of The Base Station Of Mobile Communication, Dilmurod Abdujalilovich Davronbekov, Utkir Karimovich Matyokubov
The Use Of Supercapacitors To Stabilize The Power Supply System Of The Base Station Of Mobile Communication, Dilmurod Abdujalilovich Davronbekov, Utkir Karimovich Matyokubov
Scientific-technical journal
In this study, an analysis of the current status and available outages of the mobile communication base station power supply system was performed. The effects of these outages on the power supply system have been studied and it has been shown that batteries may not be an ideal solution as a backup source. Also, the issue of the introduction of renewable energy sources in the base station power supply system of the mobile communication system and its shortcomings are mentioned. In order to overcome these problems and stabilize the power changes in the battery auxiliary element and the power supply …
Influence Of Parameters Of Non-Standard Modes Of Heat Treatment On Increasing The Wear Resistance Of Steel Products, Dorob Murotovich Berdiyev Dsn, Abdulaziz Abdullajanovich Yusupov Head Teacher, Ravshan Kobilovich Tashmatov Doctoral Student, Tuychi Nemat Ogli Ibodullayev Assistant, Kabira Erkinovna Qurbonova Head Teacher
Influence Of Parameters Of Non-Standard Modes Of Heat Treatment On Increasing The Wear Resistance Of Steel Products, Dorob Murotovich Berdiyev Dsn, Abdulaziz Abdullajanovich Yusupov Head Teacher, Ravshan Kobilovich Tashmatov Doctoral Student, Tuychi Nemat Ogli Ibodullayev Assistant, Kabira Erkinovna Qurbonova Head Teacher
Scientific-technical journal
The use of non-standard modes of heat treatment increases the density of dislocations in the crystal structure of the α-phase and increases the wear resistance of carbon, low-alloy steels under various friction conditions, which is comparable to the results when heated to a standard temperature (Ac3+30÷50 °C). The preliminary extreme heating temperature is determined. After re-quenching at standard temperature and low tempering, the wear resistance of steels under various types of friction increases by up to 40 % compared to standard quenching.