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Articles 1 - 30 of 41
Full-Text Articles in Controls and Control Theory
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.
Study Of Rheological Properties Of Solutions And Pulp During Dicalcium Phosphate Formation Process, Navruzbek Ibraimovich Khurramov, Tulkin Isamurodovich Nurmurodov, Nilufar Negboevna Bozorova, Zarifa Umarovna Karimova
Study Of Rheological Properties Of Solutions And Pulp During Dicalcium Phosphate Formation Process, Navruzbek Ibraimovich Khurramov, Tulkin Isamurodovich Nurmurodov, Nilufar Negboevna Bozorova, Zarifa Umarovna Karimova
Chemical Technology, Control and Management
This article presents the rheological properties of suspensions obtained on the basis of nitric acid decomposition of unfired phosphorites of the Central Kyzylkum, as well as the chemical compositions of dicalcium phosphate and solid residues after the filtration process. The mass-spectral analysis of the pure dicalcium phosphate salt obtained by ammonization of the liquid part separated from the solid residue and subjected to filtration was studied.
Distributed Information Space As An Associative Environment Of Communication Setting, Yusupbekov Rustambekovich Nodirbek, Shukhrat Manapovich Gulyamov, Nargiza Baxtiyorbekovna Usmanova, Malika Yuldashovna Doshchanova
Distributed Information Space As An Associative Environment Of Communication Setting, Yusupbekov Rustambekovich Nodirbek, Shukhrat Manapovich Gulyamov, Nargiza Baxtiyorbekovna Usmanova, Malika Yuldashovna Doshchanova
Chemical Technology, Control and Management
Modeling the structure of a distributed network can be based on the architecture of an associative infocommunication network, which displays the processes and mechanisms of interaction of components in the corresponding nodes of the structure. It is shown that for the description and functional representation of a distributed network, it is appropriate to apply decomposition for the field of software engineering, the purpose of which is to create theories that interact with each other according to well-defined rules. A conceptual representation of the distributed space behavior model is given. The paper discusses the modeling of the evolutionary search.
Study Of Temperature Profile In Drying Process, Shaxnoza Abduvaxitovna Sultanova, Jasur Esirgapovich Safarov, Tojiniso Tursunboyevna Raxmanova
Study Of Temperature Profile In Drying Process, Shaxnoza Abduvaxitovna Sultanova, Jasur Esirgapovich Safarov, Tojiniso Tursunboyevna Raxmanova
Chemical Technology, Control and Management
The article describes the simulation of the temperature field in a wide range of structural and operational parameters of the drying process. A qualitatively new representation of the temperature field profile in the chamber is revealed. As a result of the experiments, criteria were found for the unevenness of the temperature profiles on the pallets of the dispersion of the temperature of the material and the slope of the approximating line at fixed values of the average temperature of the substance. In the course of the work, an interrelation between the criteria of unevenness was revealed, which is clearly manifested …
Methods For Ensuring The Stability Of Design Reliability In Rural Telecommunications Network During Its Operation, Akbar Daniyarovich Normurodov Mr.
Methods For Ensuring The Stability Of Design Reliability In Rural Telecommunications Network During Its Operation, Akbar Daniyarovich Normurodov Mr.
Chemical Technology, Control and Management
The article discusses methods to ensure the stability of the design reliability of a rural telecommunications network during its operation. In rural areas, for a number of reasons, the power supply from the power supply network is interrupted at random times. In this regard, backup power sources are provided for the power supply of OLT equipment. To provide a telecommunication network with stable power supply, it is proposed to use solar sources of electricity.
Electronic Spam Filtering Based On Neural Networks, Tulkun Fayzievich Bekmuratov, Fayzullajon Bakhtiyorovich Botirov, Elshod Dilshod Ugli Haydarov
Electronic Spam Filtering Based On Neural Networks, Tulkun Fayzievich Bekmuratov, Fayzullajon Bakhtiyorovich Botirov, Elshod Dilshod Ugli Haydarov
Chemical Technology, Control and Management
This article analyzes the problem of filtering spam messages and addressing spam messages, Bayesian theorems based on artificial intelligence, LVQ algorithms (LVQ learning vector quantization) and a filtering scheme for systems based on neural networks. The direct construction of an effective neural network model of spam filtering using database recognition technology is considered. The parameters of access to the neural network how to include predefined statistical and non-statistical attributes of messages are given. The structure of neural network technology for classifying emails is also considered. The procedure for analyzing incoming data using the tool included in the analytical platform Deductor …
Developing Highly Efficient Industrial Contact Heat Exchanger, Khoshim Shayimovich Bakhronov, Abdumalik Abduvahobovich Akhmatov, Yorkin Bakhodirovich Kadirov
Developing Highly Efficient Industrial Contact Heat Exchanger, Khoshim Shayimovich Bakhronov, Abdumalik Abduvahobovich Akhmatov, Yorkin Bakhodirovich Kadirov
Chemical Technology, Control and Management
The paper presents the results of an experimental study of the intensification of heat transfer of a swirling flow in a cylindrical channel with two tangential and axial swirlers. During the experiments, such parameters were measured as: air flow in front of the vortex apparatus; hot water consumption; pressure drop in the vortex apparatus; temperature of working media at the inlet to the apparatus and at the outlet of it. A method for intensifying the heat transfer process, which is based on swirling a gas stream by its tangential supply, has been developed and investigated. Experimental studies of the intensity …
Mathematical Modeling Of Thermal Processes Of Traction Asynchronous Engines For Diagnosis And Control Of Their Technical Condition, Nilufar Rabbanaqulovna Avezova, Javharbek Sulton Ugli Fayzullayev
Mathematical Modeling Of Thermal Processes Of Traction Asynchronous Engines For Diagnosis And Control Of Their Technical Condition, Nilufar Rabbanaqulovna Avezova, Javharbek Sulton Ugli Fayzullayev
Chemical Technology, Control and Management
Mathematical models of thermal processes of traction asynchronous motors are developed. A traction asynchronous motor is considered as a thermal system consisting of three bodies (stator winding, stator magnetic core and rotor), which take into account the heat exchange not only between the corresponding bodies, but also the heat exchange between each body and the environment. It is shown that the steady excess of the stator winding temperature of a traction asynchronous motor depends on the multiplicity of the stator winding current, the coefficient of electrical energy loss, and also on the temperature coefficient of the resistance of the winding …
Synergetic Control Of Nonlinear Dynamic Objects, Isomiddin Siddikov, Komil Usmanov, Noilakhon Yakubova
Synergetic Control Of Nonlinear Dynamic Objects, Isomiddin Siddikov, Komil Usmanov, Noilakhon Yakubova
Chemical Technology, Control and Management
Considers the synthesis of effective control algorithms for a chemical reactor, which is the main one in the production of butyl alcohol. The method based on synergetic approach for transferring the apparatus from one capacity to another (specified) maintaining the required quality of the target component is proposed in order to ensure the stabilization of the concentration of target component at the outlet of the reactor under the conditions of uncertain disturbances affecting to an object. A mathematical model of the process based on a stoichiometric matrix taking into account the physicochemical properties of the process is developed. The control …
Application Of A Convolutional Neural Networks For Images Recognition, Avazjon Rakhimovich Marakhimov, Lyudmila Petrovna Varlamova
Application Of A Convolutional Neural Networks For Images Recognition, Avazjon Rakhimovich Marakhimov, Lyudmila Petrovna Varlamova
Chemical Technology, Control and Management
In the problems of image recognition, various approaches used when the image is noisy and there is a small sample of observations. The paper discusses nonparametric recognition methods and methods based on deep neural networks. This neural network allows you to collapse images, to perform downsampling as many times as necessary. Moreover, the image recognition speed is quite high, and the data dimension is reduced by using convolutional layers. One of the most important elements of the application of convolutional neural networks is training. The article gives the results of work on the application of convolutional neural networks. The work …
International Higher Education Cooperation Under Conditions Of Fuzzy Terminology: Intellectual Mobility Vector, Ulugbek Vasikovich Mannanov, Igor Ivanovich Gancherenok
International Higher Education Cooperation Under Conditions Of Fuzzy Terminology: Intellectual Mobility Vector, Ulugbek Vasikovich Mannanov, Igor Ivanovich Gancherenok
Chemical Technology, Control and Management
Terminology analysis of higher education internationalization process concerning joint educational programs is fulfilled. Fuzziness of used terminology is demonstrated. Joint higher education establishments development in the framework of fractal model is suggested as a strategic direction of higher education internationalization, enhancement of its quality and a concept of effective intellectual mobility.
Remote Measurement Of Plant Biomass By Picosecond Laser Radiation, Abdushukur Abdugafurovich Mukhamedov, Abdirashid Saribaevich Rysbaev, Shamsiddin Norchaevich Ernazarov
Remote Measurement Of Plant Biomass By Picosecond Laser Radiation, Abdushukur Abdugafurovich Mukhamedov, Abdirashid Saribaevich Rysbaev, Shamsiddin Norchaevich Ernazarov
Chemical Technology, Control and Management
A description is given of a high-speed optical recording system that uses a solid-state yttrium-aluminum garnet Nd3+ laser that generates a train of picosecond laser pulses. It is shown that by registering and temporarily scanning the secondary fluorescence radiation excited by a sequence of picosecond pulses, it is possible to remotely determine the biomass of plants based on a prematurely created bank of laboratory data.
Research Properties Of Solving Problems Of Parametric Optimization, Dilnoz Tulkunovna Muhamediyeva
Research Properties Of Solving Problems Of Parametric Optimization, Dilnoz Tulkunovna Muhamediyeva
Chemical Technology, Control and Management
A model of parametric optimization with fuzzy initial information is constructed. The conditions and areas of application of the main methods of the theory of fuzzy sets in studies of parametric optimization are determined. A connection is established between the stability of parametric optimization problems and fuzzy optimization problems. An algorithm for solving problems by the method of parametric programming is developed for fuzzy given initial information. The admissible region of the parametric programming problem and the value of its objective function at each point of this region depend on the parameter t. A description of the method for solving …
Extraction Of Chitosan From Died Honey Bee Apis Mellifera, Gulnora Akmalovna Ixtiyarova, Dilshoda Azamovna Hazratova, Bobur Nosir O’G’Li Umarov, Oksana Muratbayevna Seytnazarova
Extraction Of Chitosan From Died Honey Bee Apis Mellifera, Gulnora Akmalovna Ixtiyarova, Dilshoda Azamovna Hazratova, Bobur Nosir O’G’Li Umarov, Oksana Muratbayevna Seytnazarova
Chemical Technology, Control and Management
This article presents the results of obtaining biopolymers of chitin and chitosan from a new promising source- died honey bee apis mellifera. To obtain chitin, at the first stage, the protein (deproteination) and mineral (demineralization) constituents of subpestilence, i.e. put them in soluble state and removed. Demineralization was carried out with 2 M hudrochloric acid for 5 hours at room temperature. The process of deproteination is carried out by processing the crushed raw materials with 1 N sodium hudroxide solution for 1 hour at a temperature of 800С. Each process was accompanied by washing the raw materials to …