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Articles 31 - 60 of 85
Full-Text Articles in Engineering
The Analysis Of Methods Of Data Depersonalisation In Information Systems, Abduhalil Abdujalilovich Ganiev, Zarina Ildarovna Azizova
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.
Development Of Metrological Assurance System Of Gas Analyzer, Makhfuza Azimovna Radjabova, Barno Ismailovna Eshmatova
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.
Improvement Of Electromagnetic Flow Meters For Aggressive Liquids, A.O. Ataullaev, N.O. Ataullaev
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 …
An Intellectual Method To Optimally Control The Process Of Microwave Drying Of Thermolabile Products, A. Artikov, Z. Masharipova, F. Rakhmatov
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, …
Basic Characteristics Of Thermal Converters For Controlling Of Humidity Of Liquid Materials, N.I. Avezova, P.R. Ismatullaev, P.M. Matyakubova
Basic Characteristics Of Thermal Converters For Controlling Of Humidity Of Liquid Materials, N.I. Avezova, P.R. Ismatullaev, P.M. Matyakubova
Chemical Technology, Control and Management
In the article, the static characteristics of thermal converters of liquid materials are investigated for three possible operating modes: - at a constant heating power; - at constant temperature difference; - with discrete switching on and off of the heating element. It is shown: that a simpler and more reliable mode of operation: at a more linear static characteristic occurs at mode.It is shown that the reliability of thermal converters of moisture content in liquid materials in tracking gradual failures, taking into account destabilizing factors, when the error of the converters is not more than.
Estimation Of Hybrid Power Source Operation Efficiency Based On Generalized Indicators, Sh.N. Nematov, U.T. Mukhamedkhanov, N.N. Sadullaev
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 …
Intelligent Optoelectronic Device For Measuring And Control Water Flow In Open Channels, Yu.G. Shipulin, A.M. Khusanov, P.Yu. Khalilova, O.M. Ergashev
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 …
Uncertainty Of A Manometric Method For Determining The Humidity Of Fibrous Materials, O.Sh. Khakimov, N.Sh. Muminov, J.A. Hamidov
Uncertainty Of A Manometric Method For Determining The Humidity Of Fibrous Materials, O.Sh. Khakimov, N.Sh. Muminov, J.A. Hamidov
Chemical Technology, Control and Management
A manometric method for determining the moisture content of fibrous materials is considered. The scheme and principle of operation of the device. A formula is given for calculating the moisture content of a material. It is emphasized that the two-chamber manometric method for determining the moisture content of materials is an indirect measurement. To determine the measurement result and its uncertainty, it is necessary to justify and choose one of the appropriate methods for determining the measurement results and assess their uncertainty - the linearization method or the reduction method. The main sources of uncertainty are identified. The pairwise correlation …
Research Of The Characteristics Of The Information Stream Transmission Channel Based On A Hybrid Neural Network, Z.Z. Nigmatov, Sh.S. Karimov
Research Of The Characteristics Of The Information Stream Transmission Channel Based On A Hybrid Neural Network, Z.Z. Nigmatov, Sh.S. Karimov
Chemical Technology, Control and Management
The article describes a hybrid algorithm for tuning parameters of a neural network based on sigma-pi neurons. The process of controlling an algorithm based on a hybrid neural network is considered. The use of an integrated training approach for neural networks built on the basis of sigma-pi neurons makes it possible to train them in the time required to configure the neural network to solve an applied problem. The possibility of using a sigma-pi network to estimate the parameters of the information transmission channel based on the analysis of the spectrum of the reflected sounding signal is considered. To form …
Features Of Intelligent Models In The Theory Of Robotic And Mechatronic Systems, Kh.N. Nazarov, N.R. Matyokubov, T.O. Rakhimov
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 …
Application Of The Device For Measuring The Composition Of Binary Gas Systems, Barat Ahmedov, Rustam Amiljonovich Ibragimov
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 …
Intelligent Information Processing Systems Based On Neural Network Technology, A.M. Mamajonov, Z.N. Mukhiddinov, N.A. Jurayeva
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.
Ecg Processing And Analysis Technique Based On Neural Network Learning Vector Quantization, Talat Madievich Magrupov, Sherzod Kalandarovich Nеmatov, Yokubjon Talatovich Talatov
Ecg Processing And Analysis Technique Based On Neural Network Learning Vector Quantization, Talat Madievich Magrupov, Sherzod Kalandarovich Nеmatov, Yokubjon Talatovich Talatov
Chemical Technology, Control and Management
The main parameters of the electrocardiogram (ECG) were processed on the basis of the neural network apparatus. A decision support algorithm for ECG analysis using a neural network for learning vector quantization is proposed. For the study was chosen such features as the duration of QRS complex, RR interval, amplitude of R-wave and the change in the slope of ST segment and heart rate, which are five inputs to the neural network learning vector quantization. Methods of pre-processing and analysis of extraction of ECG functions based on the ECG database of a medical institution in Matlab are presented. The generalized …
Detection Method For “Denial Of Service” Attacks On Web Applications, Azizbek Ravshonbek Ugli Ibrohimov
Detection Method For “Denial Of Service” Attacks On Web Applications, Azizbek Ravshonbek Ugli Ibrohimov
Chemical Technology, Control and Management
A method for detecting denial-of-service attacks on web applications based on the use of a multi-layer perceptron is considered. The main issues related to the use of the neural network are described: the process of collecting and preparing statistical data, the features of forming indicators that characterize the state of the web application, as well as the issues of training and evaluating the quality of the neural network.
Optimal Ratio Of Primary And Secondary Clarifier Characteristics In Wastewater Treatment Plants, Makhsud Idrisovich Makhmudov, Zafarbek Esanovich Kuziev, Siroj Sobirovich Nurov, Sanjar Siroj Ugli Sidikov
Optimal Ratio Of Primary And Secondary Clarifier Characteristics In Wastewater Treatment Plants, Makhsud Idrisovich Makhmudov, Zafarbek Esanovich Kuziev, Siroj Sobirovich Nurov, Sanjar Siroj Ugli Sidikov
Chemical Technology, Control and Management
The issues of optimization of aerobic biological wastewater treatment processes are considered. Optimal ratios of characteristics and sizes of primary and secondary sedimentation tanks, as well as their relationship with the concentration of activated sludge by volume, are revealed. Graphical representations of the dependence of the volumes of primary, secondary and total volumes of structures on the concentration of activated sludge in cleaning processes with low and high loads are obtained. Experimental studies have shown that the concentration of activated sludge in the aeration tank and the silt index directly affect the deposition characteristics of activated sludge, in particular the …
Conceptual Basis For Modeling Multi-Cordinate Mechatronic Robot Modules, Yusupbekov Azizbek Nodirbekovich, Nazarov Khayriddin Nuritdinovich, Matyokubov Nurbek Rustamovich, Temurbek Omonboyevich Rakhimov
Conceptual Basis For Modeling Multi-Cordinate Mechatronic Robot Modules, Yusupbekov Azizbek Nodirbekovich, Nazarov Khayriddin Nuritdinovich, Matyokubov Nurbek Rustamovich, Temurbek Omonboyevich Rakhimov
Chemical Technology, Control and Management
The conceptual foundations of modeling multi-coordinate mechatronic modules of robots are considered. The use of a multi-coordinate mechatronic movement module in robots made it possible to obtain at the output of one module several linear and angular coordinates, which reduces the weight and dimensions of the robot and thereby improves its dynamic characteristics. The proposed original concept of the mathematical description of a multi-coordinate mechatronic module, which is focused on displaying their structural and operating features. A structural diagram of a developed industrial robot operating in a Cartesian coordinate system and built on the basis of a multi-coordinate mechatronic module …
Capacity Transformer Of Coaxial And Cylindrical Form Of Humidity Meter, Erkin Uljaev, Utkirjon Murodillaevich Ubaydullaev, Shohrux Nurali O'G'Li Narzullaev
Capacity Transformer Of Coaxial And Cylindrical Form Of Humidity Meter, Erkin Uljaev, Utkirjon Murodillaevich Ubaydullaev, Shohrux Nurali O'G'Li Narzullaev
Chemical Technology, Control and Management
The question of development and calculation of construction of a coaxial and cylindrical form of the capacity transformer of a humidity meter is considered. As basic data, the sizes and the materials ditches allowing to measure the humidity of different volumes of bulks from 5 to 50 gr are selected. As materials of a ditch, plastic are selected, and as tanks, the magnetizing materials are selected. It is briefly cited the advantages and disadvantages of ways to measure humidity and the basic dielectric characteristics of capacitive converters. The electrical replacement scheme of the proposed capacitive converter was provided and the …
Static Characteristics Of Thermal Humidity Converters Of Liquid Materials In Continuous Flow, N.I. Avezova, P.R. Ismatullaev, Paraxat Matyakubova
Static Characteristics Of Thermal Humidity Converters Of Liquid Materials In Continuous Flow, N.I. Avezova, P.R. Ismatullaev, Paraxat Matyakubova
Chemical Technology, Control and Management
Thermal systems with distributed heat sources based on a pipeline segment with radial holes are proposed for the development of designs of thermal humidity converters for liquid materials. Across the liquid flow there are tubular arguments with cylindrical heat-sensitive elements, on the surface of which the heating element winding was wound, which significantly increased their sensitivity, speed, reliability and allowed the use of standard semiconductor heat-sensitive elements.
Structural – Parametric Analysis And Synthesis Of Glass Furnace Condition Observer, Utkir Uktam O‘G‘Li Kholmanov
Structural – Parametric Analysis And Synthesis Of Glass Furnace Condition Observer, Utkir Uktam O‘G‘Li Kholmanov
Chemical Technology, Control and Management
A modified Kalman filter of the glass cooking process is synthesized, taking into account perturbations in the form of a sequence of colored noises. The possibility of expanding this filter by noise filters to improve functioning in the presence of low-frequency disturbances is studied and a corresponding estimation scheme with additional noise filters is proposed. The results of the simulation allow us to assume that low-frequency disturbances in the glass furnace act at the input and affect the state of the control object.
Reliable Risk Assessment Method For Effective Organization Of Information Security At Enterprise, Fayzullajon Bakhtiyorovich Botirov
Reliable Risk Assessment Method For Effective Organization Of Information Security At Enterprise, Fayzullajon Bakhtiyorovich Botirov
Chemical Technology, Control and Management
The problems of the new industry 4.0 automation paradigm are considered and the latest technologies in the field of information and communication technologies that stimulate it are analyzed, including cyber-physical systems, cloud computing, the Internet of things and big data. Some methods of multidimensional, multi-faceted industrial representation and analysis of big data are proposed. The basics of big data processing using granular computing methods have been developed. Marked the emergence of the problem of creation of special cognitive tool for constructing artificial agents, understanding integrated intelligence enterprises. In the process of information protection at the enterprise, it is proposed to …
A Study Of Security Problems In Big Data And Their Solutions, Nozima Akhmedova
A Study Of Security Problems In Big Data And Their Solutions, Nozima Akhmedova
Chemical Technology, Control and Management
Statistical data on information security that concerns Big Data and is the most important for enterprises are provided. Based on this data, we studied problems such as the lack of big data practices and protection, the lack of techniques for protecting big data, the lack of standards for protecting big data, the lack of regulation of big data and ecosystems, security problems in Big Data, and proposed several proposals to improve the security of systems that use this technology.
Identification Of Transition Matrix Of Controlled Objects Under Parametric Uncertainty Condition, Uktam Farkhodovich Mamirov
Identification Of Transition Matrix Of Controlled Objects Under Parametric Uncertainty Condition, Uktam Farkhodovich Mamirov
Chemical Technology, Control and Management
The questions of formation and construction of algorithms for identification of elements of the transition matrix of controlled objects in conditions of parametric uncertainty are considered. To identify elements of the transition matrix, we suggest using a custom model based on the type of Kalman filtration equations. Algorithms for stable calculation of a pseudo-inverse matrix using matrix decomposition are analyzed. Regular algorithms for solving argumentative problems of minimization of the identification quality criterion are given. These algorithms allow us to regularize the problem of adaptive identification of the transition matrix of an object based on regular methods for minimizing functionals …
A Study Of Static And Dynamic Characteristics Of Multifunctional Signal Converters, Akmal Abdumalikov
A Study Of Static And Dynamic Characteristics Of Multifunctional Signal Converters, Akmal Abdumalikov
Chemical Technology, Control and Management
The issues of continuity, accuracy, speed and reliability of signal conversion, which are the main problems of quality control and management of production processes, remain relevant. Research shows that in practice there are different signal variables, the study of which is highly formalized in a number of modeling tasks and basic classification studies, in particular transients in converters, its sources and elements requires a unified mathematical approach, that is, visual, highly formalized modeling and research based on it. The paper presents a graph model of multifunctional signal converters that provide microprocessor and electronic devices with signals in the form of …
Analysis Of Information Security System Standards And Key Aspects Of Security Control, Abduhalil Abdujalilovich Ganiyev
Analysis Of Information Security System Standards And Key Aspects Of Security Control, Abduhalil Abdujalilovich Ganiyev
Chemical Technology, Control and Management
The standards of the information security management system (IMS) are considered and the main aspects of information security management are studied, in particular the international standard ISO/IEC 27001, the Process approach to the management of IS, the stages of development of the information security management system. The measures taken for the organization of information security management systems are defined. Organizational measures include the implementation of information security management systems in the organization.
Improving The Electrochemical Method Of Wastewater Treatment, Dilrabo Akramovna Muhammadieva, Diyor Asadullaevich Hadjibaev, Furkat Ilyasovich Erkabaev
Improving The Electrochemical Method Of Wastewater Treatment, Dilrabo Akramovna Muhammadieva, Diyor Asadullaevich Hadjibaev, Furkat Ilyasovich Erkabaev
Chemical Technology, Control and Management
With an electrochemical method of wastewater treatment, the preliminary isolation of iron, calcium and magnesium compounds from them contributes to a more intensive recovery process. The purpose of this work is to improve the efficiency of electrochemical treatment of industrial wastewater contaminated with chromium(III) and chromium(VI) ions. The research has determined the optimal conditions for increasing the yield of chromium in the Park during electrochemical treatment of chromate-containing wastewater by using modified bentonite for pre - treatment of wastewater. Pre-softening of wastewater with modified bentonite before electrochemical treatment made it possible to increase the current yield of chromium from 17% …
Image Processing Of Technological Objects, Lyudmila Petrovna Varlamova
Image Processing Of Technological Objects, Lyudmila Petrovna Varlamova
Chemical Technology, Control and Management
The article considers the problem of creating a smoke detection and fire detection system for technological objects. Fire detection is carried out using a vision system. Monitoring of technological objects is carried out using an unmanned aerial vehicle. For further actions, processing and classification of images is necessary. When observing the technological apparatuses of the chemical and petrochemical industry, problems arise associated with the large size, distribution and extent of objects. There may be situations in which there are violations of the technological regulations and, as a result, the occurrence of fire, fire and smoke. Using the technology of unmanned …
Analysis Of Information Security Methods In Biosystems And Application Of Intelligent Tools In Information Security Systems, Sherzod Sayfullaev
Analysis Of Information Security Methods In Biosystems And Application Of Intelligent Tools In Information Security Systems, Sherzod Sayfullaev
Chemical Technology, Control and Management
In this paper, the methods of information protection in bio systems are studied. The paper considers the use of intelligent tools in information security systems and the use of adaptive information security systems. Several articles on the field of information protection in bio systems are analyzed. Disadvantages and advantages of neural network technologies in modern information security systems are described. The characteristics of bio systems and the specificity of DNA, the main features of the DNA code that provide information security and functional stability of bio systems data protection structure. Application of intelligent tools to create a comprehensive adaptive protection …
New Methods For Obtaining Quality Drinking Water In A Water Treatment Plant, Djaloliddin Nosirovich Muxiddinov, Nilufar Abdusomi Qizi Yunusova, Islom Abdisalim Ugli Daynovov
New Methods For Obtaining Quality Drinking Water In A Water Treatment Plant, Djaloliddin Nosirovich Muxiddinov, Nilufar Abdusomi Qizi Yunusova, Islom Abdisalim Ugli Daynovov
Chemical Technology, Control and Management
The article discusses modern methods, the scientific justification and the study of effective technologies in water treatment schemes for the removal of pollution of natural and man-made origin to produce high-quality drinking water. And also the proposed water treatment plant has a high resource and the ability to effectively purify water from a large number of contaminants and can be used to purify and provide high-quality drinking water to small settlements and industrial facilities located away from transport highways, as well as residential facilities of social institutions, enterprises Catering.
Procedure Formalization For Constructing An Adaptive Control System With A Reference Model Based On The Lyapunov Function, Tulkin Vafoqulovich Botirov
Procedure Formalization For Constructing An Adaptive Control System With A Reference Model Based On The Lyapunov Function, Tulkin Vafoqulovich Botirov
Chemical Technology, Control and Management
Discusses the formalization of the procedure for constructing an adaptive control system with a reference model based on the Lyapunov function. It is shown that the asymptotic stability of the extended system of differential equations guarantees accurate tracking of the desired output signal of the model. At the same time, the expediency of analyzing the asymptotic stability of the system in extended space using the Lyapunov function is shown. The above algorithms help to stabilize the computational matrix inversion procedure and thereby increase the accuracy of estimating the adjustable parameter in an adaptive control system.
Modeling Of Monitoring Systems Of Solar Power Stations For Telecommunication Facilities Based On Wireless Nets, Ilkhomjon Xakimovich Siddikov, Khalimjon Ergashevich Khujamatov, Doston Turayevich Khasanov, Ernazar Nurjamiyevich Reypnazarov
Modeling Of Monitoring Systems Of Solar Power Stations For Telecommunication Facilities Based On Wireless Nets, Ilkhomjon Xakimovich Siddikov, Khalimjon Ergashevich Khujamatov, Doston Turayevich Khasanov, Ernazar Nurjamiyevich Reypnazarov
Chemical Technology, Control and Management
In this paper described of modelling processes of the real-time remote monitoring system of solar power sources, modelled and investigated by wireless sensor nets of telecommunications devices. As a modelling environment was obtained Proteus software. In processes of modelling of the system, structure and a block diagram of the system were developed, each of elements is deleted to parts of the system and separately described. Specially created software for the research system. The structure of the system developed and software tested by modelling processes. The results of modelling of monitoring system presented in a virtual terminal, an oscillography, and a …