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Articles 1321 - 1350 of 9237
Full-Text Articles in Engineering
Research Of Electromagnetic Interference Effects On The Operational Stability Of A Measuring Device, Erkin Uljaev, Elyor Faxriddinovich Khudoyberdiev, Utkirjon Murodillayevich Ubaydullayev, Shohrux Nurali O‘G‘Li Narzullayev
Research Of Electromagnetic Interference Effects On The Operational Stability Of A Measuring Device, Erkin Uljaev, Elyor Faxriddinovich Khudoyberdiev, Utkirjon Murodillayevich Ubaydullayev, Shohrux Nurali O‘G‘Li Narzullayev
Chemical Technology, Control and Management
The article explores the impact of electromagnetic interference on the performance of measuring devices used in industrial environments. An experimental analysis of sensor parameters and the influence of electromagnetic fields on their accuracy was conducted. Testing methodologies utilizing shielding technologies were developed to enhance interference resistance. The results confirm the efficiency of protective shielding in ensuring stable device operation under various interference sources.
Numerical Simulation Of Gas Flow In A Direct-Flow Cyclone, V.S. Toptalov, S.U. Ganieva, O.M. Flisyuk, Kh.S. Nurmukhamedov
Numerical Simulation Of Gas Flow In A Direct-Flow Cyclone, V.S. Toptalov, S.U. Ganieva, O.M. Flisyuk, Kh.S. Nurmukhamedov
Chemical Technology, Control and Management
A numerical model of gas flow in a direct-flow cyclone of two different configurations is presented. The main task of the simulation was to determine the gas velocity field in the apparatus and analyze the presence of a turbulent wake of the stabilizer swirled, which can have a negative impact on the efficiency of the apparatus. During the study, it was found that when the gas flow is disrupted by the stabilizer of the swirler, a turbulent wake is formed, into which trapped particles can fall. The solution to this problem is to lengthen the stabilizer and increase its diameter. …
Flow Distribution In Magnetic Circuits Of Measuring Transducers With Distributed Parameters And A Concentrated Longitudinal Excitation Winding, Kamila Jurayeva, Javharbek Fayzullayev, Usmon Mukhtorov
Flow Distribution In Magnetic Circuits Of Measuring Transducers With Distributed Parameters And A Concentrated Longitudinal Excitation Winding, Kamila Jurayeva, Javharbek Fayzullayev, Usmon Mukhtorov
Chemical Technology, Control and Management
The given paper presents the flow distribution in magnetic circuits of measuring transducers with distributed resistance parameters of long ferromagnetic rods and the magnetic capacitance between them and a concentrated excitation winding using the example of a magnetic circuit of a new magnetically elastic tensile force measuring transducer. It is shown that in such magnetic circuits, the magnetic voltage and magnetic flux into the section of the excitation winding installation have maximum values, gradually decreasing from this section toward the end parts of the magnetic circuit. Suppose the rate of change of the magnetic voltage along the coordinate is practically …
Research And Justification Of The Optimal Optical And Design Parameters Of The Activated Sludge Concentration Measuring Device For Biological Wastewater Treatment, Siroj Sobirovich Nurov, Makhsud Idrisovich Makhmudov, Uktam Farxodovich Mamirov
Research And Justification Of The Optimal Optical And Design Parameters Of The Activated Sludge Concentration Measuring Device For Biological Wastewater Treatment, Siroj Sobirovich Nurov, Makhsud Idrisovich Makhmudov, Uktam Farxodovich Mamirov
Chemical Technology, Control and Management
This article discusses the optimization of the design and optical parameters of an activated sludge concentration measuring device through experimental studies in laboratory conditions in order to improve the metrological characteristics of the meter. In particular, based on the optimality criteria, a more suitable type of photodetector for the meter is compared and selected; for the selected photodetector, the optimal distance with the emitter is determined, which is modern LEDs that emit light of a selective wavelength of radiation and under a certain degree of illumination. Based on the experiments conducted, it was determined that the optimal thickness between the …
Analysis Of Standardization Services In An Organization And Standards Development Process Model, F.F. Fattoev, Sh.A. Turaev, A.A. Abdurakhmanov
Analysis Of Standardization Services In An Organization And Standards Development Process Model, F.F. Fattoev, Sh.A. Turaev, A.A. Abdurakhmanov
Chemical Technology, Control and Management
This article explores the economic significance of standardization within the industrial sector, highlighting its role in enhancing competitiveness and innovation in the Republic of Uzbekistan. Standardization, implemented across various levels (state, industry, and organizational), provides a framework for ensuring quality, safety, and technical consistency across production processes, products, and infrastructure. The article examines how standardization services, even if not separate organizational units, contribute to public interest by fostering consistency and productivity through the interdisciplinary technical coordination (TSC) system. Additionally, the research considers mathematical methods for developing standards, offering insights into how structured standardization can support automation, increase labor productivity, and …
Development Of A Mathematical Model For An Intelligent Process Control System In Brewing Industry, A.N. Yusupbekov, M.Sh. Yusupov
Development Of A Mathematical Model For An Intelligent Process Control System In Brewing Industry, A.N. Yusupbekov, M.Sh. Yusupov
Chemical Technology, Control and Management
The paper deals with developing a mathematical model for a system of intelligent process control in brewing, focusing on the critical parameters of fermentation: temperature, pressure, and pH level. Mathematical models of the dynamics of the process of each of the parameters are given based on exponential dependencies, which allow for the description of the change of these values over time. The possibility of using PID regulators, neural networks, and fuzzy logic to control the process under study and the modeling that allows the optimization of beer production, improving its quality and reducing costs.
Investigation Of Magnetic Circuits Of Measuring Transducers With A Distributed Longitudinal Excitation Winding, Javharbek Fayzullayev, Kamika Jurayeva, Usmon Mukhtorov
Investigation Of Magnetic Circuits Of Measuring Transducers With A Distributed Longitudinal Excitation Winding, Javharbek Fayzullayev, Kamika Jurayeva, Usmon Mukhtorov
Chemical Technology, Control and Management
The article examines the laws of distribution of magnetic voltage and magnetic flux in magnetic circuits of measuring transducers with distributed resistance parameters of long ferromagnetic rods and magnetic capacitance between them and a transverse distributed excitation winding using the example of a magnetic circuit of a new magnetically elastic force converter. It is established that in such magnetic circuits, the magnetic voltage changes its sign when passing through the section of the magnetic neutral, and the magnetic flux in the magnetic neutral has a maximum value, with a fixed value of the length of the distributed excitation winding, the …
Control Algorithms With A Predictive Model Of Dynamic Objects Of Continuous And Semi-Continuous Industrial Production, Sh.M. Gulyamov, M.Yu. Doshchanova
Control Algorithms With A Predictive Model Of Dynamic Objects Of Continuous And Semi-Continuous Industrial Production, Sh.M. Gulyamov, M.Yu. Doshchanova
Chemical Technology, Control and Management
The paper presents methods and algorithms for automatic control based on predictive models of dynamic objects in continuous and semi-continuous industrial production. The approach under consideration allows further improvement of scientific foundations and formalized methods for designing the implementation of highly efficient systems for advanced control of complex technological processes and industrial production in real-time.
Automation Of Medical Facilities, Automation Of Diagnostic Processes For Intelligent Primary Diagnosis Of Diseases Of The Oral Cavity., Otabek Ismailov, X.F. Temirova
Automation Of Medical Facilities, Automation Of Diagnostic Processes For Intelligent Primary Diagnosis Of Diseases Of The Oral Cavity., Otabek Ismailov, X.F. Temirova
Chemical Technology, Control and Management
A mathematical machine learning model for dental disease diagnosis plays an important role in medicine with high accuracy, speed, and personalization capabilities. This allows for increased efficiency not only for patients but also for medical personnel. For this reason, in this article, an improved mathematical model has been developed to effectively detect dental diseases.
Selecting The First Approach Speed Of The Igm-2k Measuring Head When Controlling The Installation Error Of Housing Parts On Tncd Machines, A.M. Abduvaliev
Selecting The First Approach Speed Of The Igm-2k Measuring Head When Controlling The Installation Error Of Housing Parts On Tncd Machines, A.M. Abduvaliev
Chemical Technology, Control and Management
Theoretical analysis and experimental studies have been conducted on the automatic control process for installation errors of body parts using the IGM-2K measuring head on numerically controlled machines. The results of the experimental study are presented, detailing the actual values of control errors and the time costs associated with automatic approach methods using the IGM-2K for checking the base points of body part surfaces on these machines. An algorithm for selecting the first approach speed F1 for IGM-2K has been developed. In accordance with the developed algorithm, the optimal values F1 are determined for a different range of installation errors …
Comparative Analysis Of Not Logic Elements Implemented On Mosfet Transistors With Their Analogs Implemented On Bipolar Transistors, Nodira Batirdjanovna Аlimova, Nilufar Baxtiyorovna Gulyamova
Comparative Analysis Of Not Logic Elements Implemented On Mosfet Transistors With Their Analogs Implemented On Bipolar Transistors, Nodira Batirdjanovna Аlimova, Nilufar Baxtiyorovna Gulyamova
Chemical Technology, Control and Management
This paper presents a comparative analysis of existing 'NOT' logic elements (LE) based on MOSFET transistors and their analogs using bipolar transistors. It was found that the 'NOT' LE circuit implemented with n-MOS transistors is analogous to the 'NOT' LE implemented with n-p-n bipolar transistors, i.e., integral-injection logic (I2L). The circuit of the LE"NOT" made on p-MOS transistors is an analog of the LE"NOT» made on bipolar transistors of the p-n-p structure. The methodologically significant similarity between the LE"NOT," implemented on complementary MOSFET transistors, and the LE" NOT," implemented on complementary bipolar transistors (BT), using the injection-voltaic effect and representing …
Improvement Of Methods And Means For Increasing The Accuracy Of Instruments For Measuring The Flow Of Liquids And Gases, U.A. Ruziyev, E.E. Ortikov
Improvement Of Methods And Means For Increasing The Accuracy Of Instruments For Measuring The Flow Of Liquids And Gases, U.A. Ruziyev, E.E. Ortikov
Chemical Technology, Control and Management
The work is devoted to the issue of increasing the accuracy of liquid flow measurement devices, containing a primary measuring transducer for measuring the pressure drop in a narrowed section of a pipeline, temperature sensors, a microprocessor, non-volatile memory, and a communication interface. To reduce uncertainty, the liquid flow measurement temperature compensation of the flow-measuring transducer is performed based on the readings of the temperature sensor installed in the measurement environment. The secondary transducer readings are calibrated based on the temperature sensor readings installed in the computing unit of the measuring device. For reliable measurement of the gas-liquid media flow, …
Neural Network Models Of Adaptive Position-Trajectory Control Systems Of Moving Objects, Dildora Usmonovna Sevinova
Neural Network Models Of Adaptive Position-Trajectory Control Systems Of Moving Objects, Dildora Usmonovna Sevinova
Chemical Technology, Control and Management
This article is devoted to neural network models of adaptive position-trajectory control systems of moving objects. Neural network models of adaptive positional-trajectory control systems of moving objects have been developed on the basis of proportional-differential adjusters, which allow for quick calculation and determination of nonlinear characteristics of the system. Also, the kinematic scheme of the multi-link industrial robot is presented for describing the motion of the multi-link industrial robot according to the specified traction and positions, and for representing the input forces and training in the neural network. Mathematical models for calculating the linear and rotational movements of the manipulator …
Diagnosis Of Malfunctions In Servo Systems Considering Dynamic, Khurshid Salim Ugli Turaev
Diagnosis Of Malfunctions In Servo Systems Considering Dynamic, Khurshid Salim Ugli Turaev
Chemical Technology, Control and Management
This study analyzes methods of fault-tolerant control and automatic fault diagnosis in servo systems considering dynamic redundancy. The application of diagnostic and fault-tolerant control methods is critical for addressing reliability and safety challenges in servo systems. Dynamic redundancy ensures the ability to respond quickly to faults in individual system components and minimizes their impact on overall system performance. The research examines approaches to fault detection, ensuring continuous operation of automated systems, and methods for their effective resolution. The practical significance of the study lies in the use of modern technologies to enhance the performance and fault tolerance of servo systems.
Method Of Selecting Elements And Designing Intelligent Optoelectronic Converters, Yuriy Gennadiyevich Shipulin, Zebiniso Akmalovna Zayniddinova, Rustam Mukhamadjonovich Rakhimov
Method Of Selecting Elements And Designing Intelligent Optoelectronic Converters, Yuriy Gennadiyevich Shipulin, Zebiniso Akmalovna Zayniddinova, Rustam Mukhamadjonovich Rakhimov
Chemical Technology, Control and Management
The article is devoted to the method of selecting elements and designing intelligent optoelectronic displacement transducers. It is proposed that morphological tables be used to expand the principles of building intelligent multifunctional optoelectronic converters. Choosing the optimal structure of intelligent multifunctional optoelectronic converters allows you to use a combination of advanced techniques to improve the design and use the morphological matrix of the main elements to choose a new structure of elements and designs of intelligent multifunctional optoelectronic converters.
The Problem Of Optimal Control Of Gas-Fired Furnace Operation, Azamat Toirovich Rajabov
The Problem Of Optimal Control Of Gas-Fired Furnace Operation, Azamat Toirovich Rajabov
Chemical Technology, Control and Management
The formulation of the problem of optimal control of gas-burning furnace operation in the glass industry is carried out. The main stages of solving this problem, starting from mathematical modeling of the investigated process and ending with the task of optimizing the furnace thermal regime, are considered. The model describes the evolution of temperature fields of fuel combustion, combustion rate, gas movement and emission concentration changes depending on control actions. Model-based control predicts the behavior of the system for the prediction horizon and selects optimal control actions on the object.
Self-Calibration Of Smart Sensors Based On Fuzzy Logic, U.A. Ruziev, M.K. Shodiev
Self-Calibration Of Smart Sensors Based On Fuzzy Logic, U.A. Ruziev, M.K. Shodiev
Chemical Technology, Control and Management
The paper discusses and analyzes the application of fuzzy logic methods for self-calibration of measuring devices. In particular, the principles of constructing measurement devices based on fuzzy logic, based on linguistic variables and rules, are considered, which makes it possible to take into account various conditions and requirements of production processes. To illustrate the effectiveness of the proposed methods, the results of experiments on measuring and classifying process parameters using fuzzy logic algorithms are presented. The study also covered fuzzy rule methods for evaluating and processing measurement data based on expert knowledge and linguistic variables. Fuzzy rule-based systems are shown …
Methods Of Synthesis Of Regulators For Nonlinear Dynamic Systems, O.O. Zaripov, D.A. Akhmedov
Methods Of Synthesis Of Regulators For Nonlinear Dynamic Systems, O.O. Zaripov, D.A. Akhmedov
Chemical Technology, Control and Management
Methods and algorithms for the synthesis of regulators for nonlinear dynamic systems are given, based on various approaches to the formation of a control device. We considered synthesis methods based on phase space, Lyapunov function method, vibration control, feedback linearization method, velocity gradient method, lag feedback method, adaptive, robust, intelligent approaches, fuzzy logic, systems with a variable structure, etc. All the methods of synthesis of nonlinear regulators discussed above give a solution to the problem only for rather narrow classes of objects. Therefore, the problem of building regulators for nonlinear systems in many cases has not yet been solved.
Implementation Of The Method Of Fuzzy Control Of The Rectification Process Based On Fuzzy Logic, Yusuf Shodievich Avazov, Kamola Rustamovna Abdullaeva
Implementation Of The Method Of Fuzzy Control Of The Rectification Process Based On Fuzzy Logic, Yusuf Shodievich Avazov, Kamola Rustamovna Abdullaeva
Chemical Technology, Control and Management
The method of controlling the rectification process using fuzzy control based on fuzzy logic is studied. The structural scheme of the rectification process control system based on fuzzy logic is proposed. The analysis of the operation of the fuzzy rectifier is also carried out by comparing the human with the elements of fuzzy thinking. It is shown that the logical thinking of the human is similar to the functions performed by the fuzzy rectifier and the work of the components of the intellectual control system. The terms of linguistic variables are presented to reflect the rectification process of multi-component mixtures. …
Enhanced Shoulder-Surfing Cued Recall Graphical Password System: Sequential Passpoint, Titus D. Fofung
Enhanced Shoulder-Surfing Cued Recall Graphical Password System: Sequential Passpoint, Titus D. Fofung
Cybersecurity Graduate Research Symposium
During the past two decades, many graphical passwords have been used widely as an alternative to text-based passwords. However, most graphical password systems are plagued by shoulder-surfing problems, usability, and remembering capability. This study proposed a new graphical password called SPP (Sequential PassPoint), allowing users to remember three click-points on two images in specified order and image order. When the image order changes, the click order is reversed. Two decoy images for three random clicks were introduced to enhance the security of SPP. The proposed SPP system was validated both theoretically and empirically
Quantum Computing, Geopolitics, And Latin America, Heriberto Acosta-Maestre
Quantum Computing, Geopolitics, And Latin America, Heriberto Acosta-Maestre
Cybersecurity Graduate Research Symposium
No abstract provided.
Experimental Study To Assess The Role Of Environment And Device Type On The Success Of Social Engineering Attacks: The Case Of Judgment Errors, Tommy Pollock
Cybersecurity Graduate Research Symposium
No abstract provided.
Assessing Organizational Investments In Cybersecurity And Financial Performance Before And After Data Breach Incidents Of Cloud Saas Platforms, Munther B. Ghazawneh
Assessing Organizational Investments In Cybersecurity And Financial Performance Before And After Data Breach Incidents Of Cloud Saas Platforms, Munther B. Ghazawneh
Cybersecurity Graduate Research Symposium
No abstract provided.
Examining Consumers' Selective Information Privacy Disclosure Behaviors In An Organization's Secure E-Commerce Systems, Patrick I. Offor
Examining Consumers' Selective Information Privacy Disclosure Behaviors In An Organization's Secure E-Commerce Systems, Patrick I. Offor
Cybersecurity Graduate Research Symposium
No abstract provided.
Synthesis Of Neuronal Network Dynamics For Optimal Stimulus Encoding And Retention, Bethanna Thompson
Synthesis Of Neuronal Network Dynamics For Optimal Stimulus Encoding And Retention, Bethanna Thompson
McKelvey School of Engineering Graduate Student Theses & Dissertations
A central goal in neuroscience is to understand the relationship between the structure and activity of the brain and the resulting experience of thought and behavior that the brain underpins. Within this goal is the specific study of working memory: the process of storing, managing, and integrating incoming sensory information in the context of ongoing tasks. The process of working memory is foundational to higher cognition and reasoning, determining how we comprehend and interact with the world around us. The neural circuits responsible for working memory are seemingly able to store and process afferent stimuli with other recent or relevant …
Actuation And Stabilization Of Volume-Efficient Origami-Inspired Mechanisms, Hunter T. Pruett
Actuation And Stabilization Of Volume-Efficient Origami-Inspired Mechanisms, Hunter T. Pruett
Theses and Dissertations
Trends in the aerospace industry are driving payloads to be smaller and less expensive while yet delivering comparatively large antennas. Deployable reflectarray antennas (RA) are the object of much research to meet these demands because they operate in a flat plane and are easier to stow than parabolic reflector antennas. Because they operate in flat plane, deployable RAs are well-suited to thickness-accommodated origami-inspired mechanisms. This work addresses pattern selection and modification, thickness accommodation, actuation, and stabilization of origami-inspired mechanisms intended to be used as RAs. First, a modified Miura-ori pattern termed volume-efficient Miura-ori (VEMO) is introduced, selected for its ability …
Advancing Data-Driven Disaster Debris Characterization And Quantification, Jasmine Bekkaye
Advancing Data-Driven Disaster Debris Characterization And Quantification, Jasmine Bekkaye
LSU Doctoral Dissertations
Natural hazards generate tremendous amounts of debris that negatively impact communities and overwhelm waste management infrastructure. The challenge in disaster debris planning and management stems from inconsistent and scarce post-disaster debris quantity data due to the chaotic nature of recovery operations. This leads to a limited understanding of key factors influencing disaster debris generation across hazards and regions, hindering the accuracy and efficiency of modeling. With the increasing availability of comprehensive post-disaster waste datasets, the capacity to understand debris generation is expanding. This dissertation aims to fill knowledge gaps on disaster debris generation as follows: (1) investigate existing technologies for …
Understanding Orbits: Orbit Facts, Robert J. Twiggs
Understanding Orbits: Orbit Facts, Robert J. Twiggs
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint Presentation created by Professor Bob Twiggs titled "Understanding Orbits: Orbit Facts" from October 22, 2024.
Understanding Orbits: Just Enough To Make You Dangerous, Robert J. Twiggs
Understanding Orbits: Just Enough To Make You Dangerous, Robert J. Twiggs
Robert "Bob" Twiggs STEM Education Collection
A PowerPoint presentation created by Professor Bob Twiggs titled "Understanding Orbits: Just enough to make you dangerous" from October 22, 2024.
Sunrise Propulsion Subsystem Leak Rate Measurement Methodology, Alex Kirkman, Brittany Woytko, Holly Walen, Bret Maughan
Sunrise Propulsion Subsystem Leak Rate Measurement Methodology, Alex Kirkman, Brittany Woytko, Holly Walen, Bret Maughan
Space Dynamics Laboratory Publications
As part of the integration and testing for Sun Radio Interferometer Space Experiment (SunRISE), it was necessary to characterize the propellent leak rate of the fully assembled propulsion subsystem for each satellite to ensure compliance with performance requirements. SunRISE utilized a cold gas system for its propulsion subsystem, using R-236fa propellant inside a tank made from a monolithic 3D printed SLA material. It was not possible to accurately characterize the propellent leak rate via weight by measuring the mass loss from the tank. This is due to the SLA material having both a high absorbance rate of water in normal …