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Articles 53701 - 53730 of 197219

Full-Text Articles in Engineering

Approaches To Solving Problems Of Optimization Of Solving Monitoring Problems Based On Natural Computing Algorithms, D.T. Muhamediyeva Nov 2020

Approaches To Solving Problems Of Optimization Of Solving Monitoring Problems Based On Natural Computing Algorithms, D.T. Muhamediyeva

Chemical Technology, Control and Management

To find approximate optimization solutions, many algorithms are used, seven of which are considered in this work: fuzzy sets, artificial neural networks, genetic algorithm, ant algorithm, particle swarm algorithm, DNA computation, and a new approach based on artificial immune systems (IIS). All these methods belong to the direction of "natural computing", ie. model certain biological processes, the algorithms of which nature has created for millions of years. It should be noted that the efficiency of one or another algorithm depends on the characteristics of the initial data of the problem, so it is impossible to unambiguously determine which of the …

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System Of Analytical Control And Control Of Technological Parameters Of Cotton-Cleaning Production, I.Kh. Siddikov, D.A. Khalmatov, U.O. Khuzhanazarov, G.R. Alimova Nov 2020

System Of Analytical Control And Control Of Technological Parameters Of Cotton-Cleaning Production, I.Kh. Siddikov, D.A. Khalmatov, U.O. Khuzhanazarov, G.R. Alimova

Chemical Technology, Control and Management

A system analysis of the system of analytical control and management of technological parameters of cotton-cleaning production was performed. At the same time, the control system is studied as an adaptive control object that quickly changes its parameters depending on the actual state of the controlled technological parameters. A method for determining the frequency of removal of technological parameters based on the methods of mathematical statistics and based on the analysis of experimental data of a particular process is proposed. The functional dependence of the original variables from the information obtained from the system sensors. The source data is formalized …

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Automated Monitoring And Control System For Cotton Saw Gin, N.Z. Kamalov, Sh.Z. Kamalov Nov 2020

Automated Monitoring And Control System For Cotton Saw Gin, N.Z. Kamalov, Sh.Z. Kamalov

Chemical Technology, Control and Management

The problems of automation of the technological process of saw gin of cotton are considered. The task and technical requirements to the control and management system for the saw gin of cotton are formulated. Based on the technical requirements, an algorithm is developed for the functioning of the control and management system. Using microprocessor technology, an automated monitoring and control system has been developed for the saw gin unit of cotton. The developed automated control and management system was tested in the production conditions of the ginnery and implemented.

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Modeling The Process Of Heat Exchange Between Heaters And The Material Taking Into Account Heat Exchange With The Environment, J.E. Safarov, Sh.A. Sultanova, G.T. Dadayev, B.T. Jumayev, A.B. Saydullayev Nov 2020

Modeling The Process Of Heat Exchange Between Heaters And The Material Taking Into Account Heat Exchange With The Environment, J.E. Safarov, Sh.A. Sultanova, G.T. Dadayev, B.T. Jumayev, A.B. Saydullayev

Chemical Technology, Control and Management

The paper considers the modeling of the process of heat transfer between heaters and material, taking into account heat exchange with the environment. To solve this problem, an experimental drying unit was assembled. Paraffin, sand, salt and brick were selected as test materials. The research carried out with the use of paraffin shows the most optimal and economical result in relation to other materials. The efficiency of paraffin application reaches 51 ºС, and the cooling time takes much longer. In addition, the selected material and the selected temperature have a beneficial effect on the drying process of plant material. The …

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Diagnosis Of Process Equipment In The Processing Of Cable Waste, Based On Artificial Neural Networks, O.Kh. Ishnazarov, V.V. Tsypkina, V.P. Ivanova Nov 2020

Diagnosis Of Process Equipment In The Processing Of Cable Waste, Based On Artificial Neural Networks, O.Kh. Ishnazarov, V.V. Tsypkina, V.P. Ivanova

Chemical Technology, Control and Management

The article discusses the increasing efficiency of the technological equipment for the processing of cable waste. It is proposed to solve the problem by using modern expert systems, such as artificial neural networks (ANN), which will allow diagnosing the working system of the equipment, making technical and technological assessment of its condition effectively, taking into account noisiness of input data. The solution to the technological problem is based on the use of artificial intelligence methods, based on artificial neural networks, which allow achieving new functionality of the cable waste processing line and improving the quality of technical diagnostics.

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Development Of Metrological Assurance System Of Gas Analyzer, Makhfuza Azimovna Radjabova, Barno Ismailovna Eshmatova Nov 2020

Development Of Metrological Assurance System Of Gas Analyzer, Makhfuza Azimovna Radjabova, Barno Ismailovna Eshmatova

Chemical Technology, Control and Management

The generator of calibration mixtures for obtaining vapor-gas mixtures of mercaptans in wide range of concentrations (5÷100) mg/m3 is given, which is a unified means of converting gas samples, ensuring their dignified appearance, preservation of the original composition of the measured gas (substance), cleaning the mixtures from alien components, stability of samples in temperature, pressure, humidity and flow rate. Analysis and comparison of possible options allows recognizing calibration method as the optimal, associated with use of exemplary dynamic generator of gas mixtures with permeable tubes.

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An Intellectual Method To Optimally Control The Process Of Microwave Drying Of Thermolabile Products, A. Artikov, Z. Masharipova, F. Rakhmatov Nov 2020

An Intellectual Method To Optimally Control The Process Of Microwave Drying Of Thermolabile Products, A. Artikov, Z. Masharipova, F. Rakhmatov

Chemical Technology, Control and Management

The article enlightens the issue of an intellectual method for optimal control of high-quality drying of thermolabile products in a microwave installation. Mathematical and computer models were compiled by multi-stage system thinking and analysis, and their adequacy was established with a probability of 0.95. The optimal control mode allows you to maintain the temperature of the material in the specified limit and produce a high-quality dried product. A system of microprocessor-based discrete automatic control of a microwave dryer is proposed to enable the heater to be switched on at various specified ranges with a decreasing frequency of material temperature changes, …

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Recognition Via Morphological Features Of Tulip By The Algorithms For Calculating Estimates, Mirzayan Kamilov, Mirzaakbar Hudayberdiev Nov 2020

Recognition Via Morphological Features Of Tulip By The Algorithms For Calculating Estimates, Mirzayan Kamilov, Mirzaakbar Hudayberdiev

Chemical Technology, Control and Management

The paper discusses two problem, the firth, possibilities of improving the quality of the recognition algorithm based on partial precedent, by the original pre-training procedures. And second finding the optimal procedure for constructing improved results in some sense, the algorithms for calculating estimates. The peculiarity of this algorithm is that as precedents only such "anchor points" of a pattern that ensuring the following conditions are left: the distance from any point on the training set of i-th pattern to their nearest precedent is less than the distance to the nearest precedent of another pattern. This set of precedents provides unmistakable …

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Ip-Traffic Classification Model Based On Machine Learning Ways, Madjit Malikovich Karimov, Sherzod Rajaboevich Gulomov Nov 2020

Ip-Traffic Classification Model Based On Machine Learning Ways, Madjit Malikovich Karimov, Sherzod Rajaboevich Gulomov

Chemical Technology, Control and Management

This article analyzes machine learning ways for classifying traffic filtering: supervised learning and unsupervised learning; semi-supervised learning; reinforcement learning- classification and their use for segmentation and recognition of objects. A method of teaching with supervised learning for filtering traffic is applied, and a classifier training model with supervised learning is proposed.

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Mathematical Modeling Of Operational-Dispatching Processes Of Complex Technological Objects, Sh.M. Gulyamov, Yu.Sh. Avazov, M.Yu. Doshchanova, E. Samadov Nov 2020

Mathematical Modeling Of Operational-Dispatching Processes Of Complex Technological Objects, Sh.M. Gulyamov, Yu.Sh. Avazov, M.Yu. Doshchanova, E. Samadov

Chemical Technology, Control and Management

Mathematical modeling of the processes of operational dispatch control of complex technological objects was carried out using the example of catalytic cracking of oil. It is shown that further progress in the catalytic cracking of hydrocarbon feedstock is associated with the involvement of heavy vacuum distillates, fuel oils and other oil residues as feedstock for the production of high-octane gasoline fractions, as well as with the implementation of improved or advanced control systems and development of adaptive algorithms for operational dispatching predictive control that allow control systems to track the current technological situation and form control actions that are adequate …

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Decision-Making Under Conditions Of Definition And Risk Based On Strict Methods, O.V. Porubay Nov 2020

Decision-Making Under Conditions Of Definition And Risk Based On Strict Methods, O.V. Porubay

Chemical Technology, Control and Management

In this paper, the problems of decision-making in conditions of certainty and risk based on strict methods are considered. The classification of methods of decision theory is presented, taking into account the uncertainty and related subjectivity in evaluating decision options. Strict methods are considered, which include methods of mathematical optimization, or mathematical programming, designed to solve single- or multi-criteria problems of finding the optimal solution. Thus, based on computational experiments, we can conclude that strict methods are usually used in decision-making under conditions of certainty and possibly risk, heuristic methods in conditions of risk and uncertainty, and also if strict …

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The Analysis Of Methods Of Data Depersonalisation In Information Systems, Abduhalil Abdujalilovich Ganiev, Zarina Ildarovna Azizova Nov 2020

The Analysis Of Methods Of Data Depersonalisation In Information Systems, Abduhalil Abdujalilovich Ganiev, Zarina Ildarovna Azizova

Chemical Technology, Control and Management

This article deals with methods of ensuring the protection of personal data through the use of the process of anonymisation, as well as with the definition of the process of data anonymisation as a strategy for preserving basic information from the full set of personal data and mitigating possible risks that need to be taken into account in the use of data anonymisation methods.

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Improvement Of Electromagnetic Flow Meters For Aggressive Liquids, A.O. Ataullaev, N.O. Ataullaev Nov 2020

Improvement Of Electromagnetic Flow Meters For Aggressive Liquids, A.O. Ataullaev, N.O. Ataullaev

Chemical Technology, Control and Management

The model developed electromagnetic flow sensors with ring channels and alternating magnetic poles alternately in a three-dimensional approximation and the results of a study of their static characteristics. It was shown that due to the formation in the pipeline system with alternating magnetic poles is substantially increased channel length of the active zone of the sensor, thereby improving sensitivity of measurement. Found that the positive effect, i.e. fuller use of the cross-sectional area of the pipeline in the area of the electrodes is especially pronounced in the flow sensor with a diameter of 150 mm pipeline. It was found that …

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Micro-Architectural Countermeasures For Control Flow And Misspeculation Based Software Attacks, Love Kumar Sah Nov 2020

Micro-Architectural Countermeasures For Control Flow And Misspeculation Based Software Attacks, Love Kumar Sah

USF Tampa Graduate Theses and Dissertations

Embedded system applications in diverse sectors such as transportation, healthcare, homeautomation, etc., have been gathering, processing, and transporting data using embedded computers connected to vast networks. As the usage of these embedded devices in daily life is increasing exponentially, security of these devices is a growing concern amongst the users. An alarming rise in recent cyber-attacks has deepened such concern. In the recent past, software-based attacks are more sophisticated and larger in scale than previously known. An embedded processor depends on a compiler to use the architecture efficiently. The compiler generates object code to efficiently utilize the micro-architecture for storage …

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Oxergy Analysis Of The Installation Of Primary Oil Refining, Shuxrat Manapovich Gulyamov, Nasiba Jumabaevna Khojieva, Sitora Isakova Nov 2020

Oxergy Analysis Of The Installation Of Primary Oil Refining, Shuxrat Manapovich Gulyamov, Nasiba Jumabaevna Khojieva, Sitora Isakova

Chemical Technology, Control and Management

The questions of thermodynamic exergy analysis of complex chemical and technological systems based on the study of the conversion of exergy in technological apparatuses and installations for the rational use of exergy circulating in the CTS are set forth . A functional approach to the selection of environmental parameters has been substantiated , which allows, indirectly, in the absence of data on the exact chemical composition of the process stream, to reliably determine the second component of exergy. An exergy analysis of the existing ELOU-AVT unit at an existing oil refinery was carried out with an increase in its productivity …

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Fuzzy Information And Expert Systems For Analysis Of Failure Of Automatic And Telemechanic Systems On Railway Transport, Timur Tashmetov, Kamoliddin Tashmetov, Ravshan Aliev, Muhamadaziz Rasulmuhamedov Nov 2020

Fuzzy Information And Expert Systems For Analysis Of Failure Of Automatic And Telemechanic Systems On Railway Transport, Timur Tashmetov, Kamoliddin Tashmetov, Ravshan Aliev, Muhamadaziz Rasulmuhamedov

Chemical Technology, Control and Management

This article provides the principles and methods of designing an expert system to obtain information on to eliminate malfunctions automatic and telemechanic system in railway transport. An expert system is presented that performs a modeling action on restore problem situations and correct various types of errors, failures of various systems, and determine the elimination of malfunction of automatic and telemechanic systems of railway transport

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Risk Of Injury Analysis In Depth Jump And Squat Jump, Curtis L. Tomasevicz, Jeffrey C. Woldstad, [email protected] Nov 2020

Risk Of Injury Analysis In Depth Jump And Squat Jump, Curtis L. Tomasevicz, Jeffrey C. Woldstad, [email protected]

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Introduction: The depth jump (DJ) and squat jump (SJ) are accepted ways to assess and train power producing ability but are not without risk of injury. Methods: Sixteen male participants (age = 21.7 ± 1.54 yrs., height = 177.7 ± 11.4 cm, mass = 77.7 ± 13.6 kg) were evaluated for power exertion capabilities while being assessed for risk of injury in the knee and low back through a range of resistances based on a percentage of participants’ heights in the DJ (0% through 50%) and bodyweights for the SJ (0% through 100%). Two variables were used to assess the …

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Modeling Of The Synthesis Of Pyrroles In Chemical Production, U. Shokirov, B. Mukhitdinov, S. Turabdjanov, R. Choriev, X. Kadirov Nov 2020

Modeling Of The Synthesis Of Pyrroles In Chemical Production, U. Shokirov, B. Mukhitdinov, S. Turabdjanov, R. Choriev, X. Kadirov

Chemical Technology, Control and Management

This work has studied the reaction of catalytic conversion of butyn-2-diol-1,4 and ammonia in the presence of complex mixed polyfunctional catalysts. It was found that in order to take into account uncertainties of various nature, it was proposed to solve the problem of ensuring the safety of chemical production at a qualitatively new level using new information technologies based on the creation of intelligent decision support systems for managing the safety of chemical technological processes and systems at all stages of occurrence. These systems make it possible to formulate recommendations for various decision-makers on the management of the safety of …

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Application Of The Device For Measuring The Composition Of Binary Gas Systems, Barat Ahmedov, Rustam Amiljonovich Ibragimov Nov 2020

Application Of The Device For Measuring The Composition Of Binary Gas Systems, Barat Ahmedov, Rustam Amiljonovich Ibragimov

Chemical Technology, Control and Management

The methodology and results of measuring the density of natural gas using precision measurement of the composition of binary systems have been defaced. The application of the device for measuring the composition of binary gas systems is presented. Selected for the analysis methodology is weighing the cells and vessels after they have accumulated a sufficient amount of each component. The design of the sorption cell is substantiated under the conditions of ensuring the maximum value of the relative useful mass. For measuring the density of natural gas is determined by the needs of the development of measuring technology, the problems …

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Optimization Of The Sizes Of The Cylindrical Measuring Transducer, E. Uljayev, U.M. Ubaydullayev, Sh.N. Narzullayev, L.N. Nasimxonov Nov 2020

Optimization Of The Sizes Of The Cylindrical Measuring Transducer, E. Uljayev, U.M. Ubaydullayev, Sh.N. Narzullayev, L.N. Nasimxonov

Chemical Technology, Control and Management

In this paper, questions of determination of the sizes of electrodes of capacity measuring transducers depending on tolerated relative error of measurement are considered. Dependences of ways of laying of grain materials on their electrical conductance are analyzed. It is established that the problem of optimization can be solved by the determined and statistical methods. At the determined method, it is accepted that all particles of the contacting layer with an electrode of bulk materials are located in order. At the statistical technique, the arrangement of particles is accidental, submitting to any distribution law, for example, normal. The example of …

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Estimation Of Hybrid Power Source Operation Efficiency Based On Generalized Indicators, Sh.N. Nematov, U.T. Mukhamedkhanov, N.N. Sadullaev Nov 2020

Estimation Of Hybrid Power Source Operation Efficiency Based On Generalized Indicators, Sh.N. Nematov, U.T. Mukhamedkhanov, N.N. Sadullaev

Chemical Technology, Control and Management

The article substantiates the need to develop generalized indicators to assess the effectiveness of complex systems as "smart" networks. For a comprehensive and objective assessment of the microgrid operation efficiency, studies conducted world-wide aimed at creation of a single efficiency indicator by generalizing indicators of energy efficiency are analyzed. The priority area of research is development of a generalized indicator of the relative normalization of performance indicators and determination of a rational order of ranking these indicators in order of importance. For selection and ranking of indicators, we use the method of “expert assessments”. When choosing indicators, the "minimum of …

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Adaptive Pole Placement Algorithms For Of Non-Minimum-Phase Stochastic Systems, J.U. Sevinov, O.H. Boeva Nov 2020

Adaptive Pole Placement Algorithms For Of Non-Minimum-Phase Stochastic Systems, J.U. Sevinov, O.H. Boeva

Chemical Technology, Control and Management

Adaptive pole placement algorithms for non-minimal phase stochastic systems are presented. The characterization of the structure and the set of models of linear dynamic control objects are carried out. As an example, the algorithm of the extended self-tuning controller is considered. To find the estimate of the controller parameters, the recursive least squares method is used. An explicit algorithm is proposed that makes it possible to exclude the operation of matrix inversion, which requires significant computational costs. Pole placement algorithms are given in the presence of white noise at the output. These algorithms belong to the class of stochastic approximation …

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Control Of The Degree Of Intensification And Convective Heat Exchange With Flow Of Liquids In Pipes With Turbulators, B.B. Babatullaev, E.T. Mavlonov, U.V. Mannanov, Kh.S. Nurmukhamedov, U.H. Sagdullaev Nov 2020

Control Of The Degree Of Intensification And Convective Heat Exchange With Flow Of Liquids In Pipes With Turbulators, B.B. Babatullaev, E.T. Mavlonov, U.V. Mannanov, Kh.S. Nurmukhamedov, U.H. Sagdullaev

Chemical Technology, Control and Management

The article discusses the problem of controlling the degree of intensification of the absorption process of NH 3 purified brine and CO 2 ammoniated brine in the technology of soda ash production. It is known that the aforementioned gases upon contact with brine the reaction proceeds with liberation of a considerable quantitative via heat. Increasing temperatures s lead to reduced NIJ output and finished products. Timely control of the withdrawal requires maintaining the degree of intensification of the heat exchange process at a certain level while maintaining the ratio of the absorption and cooling zones of the absorption tower. To …

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Mathematical Modeling Of A Ball Mill In Gmz-2 Ngmk Based On The Diffusion Model, Y.B. Kadirov, S.B. Boybutayev, A.R. Samadov Nov 2020

Mathematical Modeling Of A Ball Mill In Gmz-2 Ngmk Based On The Diffusion Model, Y.B. Kadirov, S.B. Boybutayev, A.R. Samadov

Chemical Technology, Control and Management

In the mining and metallurgical industry, in addition to raw materials, the quantitative volume of technological operations has a significant impact on the cost of the extracted metal. As practice shows, the most energy-intensive process is crushing of rocks, which accounts for 30-50% of all production costs. In this connection, the management of this process is one of the main technical and economic factors in the chain of rock dressing. In this paper, the mathematical function of the ball mill MSHTs 75x55 is derived, on the basis of which a computer model is built in the SIMULINK subsystem of the …

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Discrete Current Measuring Transformers, Sultan Fayzullaevich Amirov, Nargisa Kamilovna Babanazarova Nov 2020

Discrete Current Measuring Transformers, Sultan Fayzullaevich Amirov, Nargisa Kamilovna Babanazarova

Chemical Technology, Control and Management

Article studies control and measuring systems in which high-voltage current measuring transformers are used, which are analogue measuring converters with a number of drawbacks. In this regard, it is proposed to use discrete current transformers, the use of which leads to simplification and cheapening of structures, are reliable carriers of measuring information, as well as discrete signals from discrete current transformers can be transmitted through connecting wires of smaller cross-section.

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Intelligent Optoelectronic Device For Measuring And Control Water Flow In Open Channels, Yu.G. Shipulin, A.M. Khusanov, P.Yu. Khalilova, O.M. Ergashev Nov 2020

Intelligent Optoelectronic Device For Measuring And Control Water Flow In Open Channels, Yu.G. Shipulin, A.M. Khusanov, P.Yu. Khalilova, O.M. Ergashev

Chemical Technology, Control and Management

An intelligent optoelectronic device for accounting and control of water flow in open channels is considered. The elements of the construction, the principle of operation, taking into account the profile of the hydraulic structure are given. Analytical methods are proposed for reducing periodic fluctuations relative to the horizontal water level. To improve the accuracy of accounting, the rate coefficient Ky was introduced. The choice of a micro-processor has been substantiated, which allows to process simultaneously a number of signals (level, flow rate, speed, temperature) and to solve problems: implementation of dynamic indication; implementation of communication with the periphery; implementation of …

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Intelligent Information Processing Systems Based On Neural Network Technology, A.M. Mamajonov, Z.N. Mukhiddinov, N.A. Jurayeva Nov 2020

Intelligent Information Processing Systems Based On Neural Network Technology, A.M. Mamajonov, Z.N. Mukhiddinov, N.A. Jurayeva

Chemical Technology, Control and Management

The use of fuzzy logic in management tasks was primarily due to the increasing complexity of existing tasks. Fuzzy logic and management based on it are close to the principles of human thought. Fuzzy logic essentially provides effective means of displaying uncertainties and inaccuracies in the real world. The availability of mathematical means to reflect the fuzziness of the source information makes it possible to build a model of adequate reality.

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Methods For Calculating The Coefficients Of The Rail Fourpole Of Sensors Control Tonal Frequency, R.M. Aliev, M.M. Aliev Nov 2020

Methods For Calculating The Coefficients Of The Rail Fourpole Of Sensors Control Tonal Frequency, R.M. Aliev, M.M. Aliev

Chemical Technology, Control and Management

For develop sensors of controlling the state of track sections in interval train control systems, it is first necessary to determine the coefficients of the fourpoles of the rail lines, taking into account the influence of adjacent rail lines and the availability of trains on these lines. The article reviewed methods for determining these coefficients, which are in the further at of researches and development of such sensors will allow of the creation of modern sensors controlling, ensuring the safety of train traffic.

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Features Of Intelligent Models In The Theory Of Robotic And Mechatronic Systems, Kh.N. Nazarov, N.R. Matyokubov, T.O. Rakhimov Nov 2020

Features Of Intelligent Models In The Theory Of Robotic And Mechatronic Systems, Kh.N. Nazarov, N.R. Matyokubov, T.O. Rakhimov

Chemical Technology, Control and Management

The article discusses the features of intelligent models and tasks in the theory of mechatronic and robotic systems, the algebraic model of artificial intelligence, formalized types of intellectual tasks, intelligent models of the problem area, which are distinguished by their versatility and clarity. Intellectual models and tasks in the field of the theory of robotic systems are formally presented. As part of a set of inference rules, intelligent models as universal rules use rules of substitution and conclusion, similar to the deductive rules of inference in propositional and predicate calculus, and the rules of meaning. The systematization of t the …

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Organization Of Resources Of Distributed Computing Systems For Simulation And Research Of Complex Objects, T.F. Bekmuratov, R.K. Bazarov Nov 2020

Organization Of Resources Of Distributed Computing Systems For Simulation And Research Of Complex Objects, T.F. Bekmuratov, R.K. Bazarov

Chemical Technology, Control and Management

Computing systems designed to study complex objects have evolved from single-processor computers to fog infrastructures. The article describes the composition, hardware and software features of modern distributed grid-, cloud- and fog computing systems. It is shown how these features affect the study time of complex objects. This time is a measure of computing system effectiveness. Unfortunately, there is still no assessment of modern computing system architectures in terms of that measure. The article fills this deficiency. Computing systems should have the properties of complex objects under study - the main conclusion of the publication.

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