Robust Maximum Capture Facility Location Under Random Utility Maximization Models,
2023
Singapore Management University
Robust Maximum Capture Facility Location Under Random Utility Maximization Models, Tien Thanh Dam, Thuy Anh Ta, Tien Mai
Research Collection School Of Computing and Information Systems
We study a robust version of the maximum capture facility location problem in a competitive market, assuming that each customer chooses among all available facilities according to a random utility maximization (RUM) model. We employ the generalized extreme value (GEV) family of models and assume that the parameters of the RUM model are not given exactly but lie in convex uncertainty sets. The problem is to locate new facilities to maximize the worst-case captured user demand. We show that, interestingly, our robust model preserves the monotonicity and submodularity from its deterministic counterpart, implying that a simple greedy heuristic can guarantee …
The Algorithm For The Design Of Fine Granular Substances’ Smart-Type Heat And Moisture Converters Based On Their Accuracy And Speed Criteria,
2023
Tashkent State Technical University, Address: 2 Universitetskaya St., 100095, Tashkent city, the Republic of Uzbekistan. E-mail: [email protected], Phone: +998-99-919-71-64;
The Algorithm For The Design Of Fine Granular Substances’ Smart-Type Heat And Moisture Converters Based On Their Accuracy And Speed Criteria, Erkin Uljaev, Ali Abduakhatovich Abduraxmanov
Chemical Technology, Control and Management
The paper describes a technique and algorithm allowing to perform parametric design of smart-type heat and moisture converters (hereinafter SHMC) of fine-grained dispersive materials based on their criteria of accuracy and speed. The proposed algorithm optimizes the process of design of smart-type switches and ensure optimal performance of the switches. The method of calculation and selection of optimal parameters of smart-type heat and moisture converters intended to be used in the measurement of parameters such as heat and humidity of fine dispersive substances are aimed at boosting two parameters, i.e., the accuracy and speed. Also, the design stages have been …
Metric Algorithms Of Symbol Detection For Determining A Group Of Significant Objects,
2023
Tashkent University of Applied Sciences, Tashkent, Uzbekistan. E-mail: [email protected].
Metric Algorithms Of Symbol Detection For Determining A Group Of Significant Objects, Sherzod Ismoiljonovich Yuldashev
Chemical Technology, Control and Management
This article examines the algorithm of nearest neighbors, which widely uses metric classification algorithms and the combinatorial theory of reconnection with the precedent information in solving practical recognition problems. One of the most important issues in the development of image recognition systems is that the image recognition system determines the characteristics of objects. Most pattern recognition methods are used in the process of recognizing not all objects of the training sample, but a certain part of the objects. The formation of a training sample by filtering objects according to the level of importance for metric classification algorithms is carried out …
Algorithm For The Functioning Of The Robot's Mechatronic System,
2023
Department of Automation and Technological Process Control, National Research University Tashkent Institute of Irrigation and Agricultural Mechanization Engineers, Uzbekistan, 100000, Tashkent, st. Corey Niyozi 39.
Algorithm For The Functioning Of The Robot's Mechatronic System, Nodira Batirdjanovna Alimova, Bekmurod Bayotovich Yusupov
Chemical Technology, Control and Management
Currently, the introduction of mechatronics and robotics into modern technologies, including rural industry, which are based on different types of mechatronic modules, is relevant. The article discusses the functioning algorithm of the electro-pneumatic multi-position mechatronic system of an intelligent robot. The mechatronic system under consideration is an integrated complex of electro-pneumatic elements, electronic elements and computer technology, with constant dynamic changes in energy and information between them, united by a common automatic control system. The main distinctive feature of this mechatronic system is increased positioning accuracy and high traction forces.
Dependence Of The Granulometric Composition Of Chalk During Granulation In A Turbulized Layer,
2023
Tashkent Institute of Chemical Technology, Address: 100011, Navoi Street, 32, Tashkent, Uzbekistan.
Dependence Of The Granulometric Composition Of Chalk During Granulation In A Turbulized Layer, N.A. Annaev, S.Kh. Nurmukhamedov, Zh.V. Sultonov, N.Sh. Khudoiberdieva
Chemical Technology, Control and Management
The article presents the results of an experimental study on chalk granulation in the turbulized layer of a turboblade granulator. The design of the apparatus combines the following sequential processes: grinding, granulating and compacting newly formed granules. In addition, this device has the ability to carry out both rotational and reciprocating motion. It has been established that preliminary grinding of the feedstock increases the efficiency of the granulation process and improves the quality of the finished product. In the experiments, four substances were used to create 2 astringent suspensions and the optimal combination and their ratios were determined. The experiments …
Study Of Technological Multi-Stage Modes Of Refining Vegetable Oils,
2023
Tashkent state technical university named after Islom Karimov, Address: 2, University str., 100095, Tashkent, Uzbekistan. E-mail: [email protected].
Study Of Technological Multi-Stage Modes Of Refining Vegetable Oils, Elyor Erkinovich Samadov
Chemical Technology, Control and Management
The work reflects the current state of the technology for obtaining refined vegetable oils and identifies trends in their improvement and further development in the environment of industrial automation using modern methods of distributed monitoring, building control, and management systems for technological processes of refining vegetable oils. The influence of technological modes of refining vegetable oils on the efficiency of diffusion extraction of free fatty acids (FFA) has been studied and the indirect pH-metric measurement of FFA concentration has been substantiated.
Fast Fourier Transform Analytical Expression Of Estimation Of Nosinusoidality Indicators,
2023
National Research University TIIAMME, Adrdress: 28-19, Karakamish 2/4, 100149, Tashkent, Republic of Uzbekistan, E-mail: [email protected], Phone: +998946009877;
Fast Fourier Transform Analytical Expression Of Estimation Of Nosinusoidality Indicators, Ilkhomjon Khakimovich Siddikov, Zailobiddin Urazali O’G’Li Boixanov
Chemical Technology, Control and Management
This in the article asynchronous motor is reactive power control to do and manage for from the transformer used. The main element of the current transformer is the measuring instrument, i.e. the sensitive element. Depending on the number of asynchronous motor stator blades, the measurement sensitive element is placed between the main winding and the rotor as a two-ring or three-ring. Measurement accuracy, reliability, and sensitivity increase compared to an independent measuring device. The measuring element loops are independent or connected in series . When the measurement loops are connected in series, the amount of output voltage is …
Development Of An Imitation Model Of The Vulcanization Process In The Production Of Elastomeric Composites,
2023
Yangiyer Branch of Tashkent Institute of Chemical Technology, Address: 1, Tinchlik street, Yangiyer city, Sirdarya, Republic of Uzbekistan. E-mail: [email protected], Phone: +998-94-698-7675;
Development Of An Imitation Model Of The Vulcanization Process In The Production Of Elastomeric Composites, Toshtemir Avezov, Mirxalil Agzamovich Ismailov
Chemical Technology, Control and Management
In the article, a systematic approach to the mathematical modeling of the production process of complex multi-stage elastomeric composites was considered, which allows to take into account the stoichiometric relationship of the chemical reaction in the process. Based on the chemical reaction occurring in the mixer, a kinetic model of the elastomer composites production process is proposed, which is the basis for obtaining the main functional relationship of the mathematical model for the mixer, the main quality indicator of the process. The proposed systematic approach in the form of a mathematical model based on the stoichiometric relationship and the …
Synthesis Problem Of Adaptive Control Systems For Multi-Channel And Multi-Mode Objects,
2023
Tashkent state technical university named after Islom Karimov. Address: 2 University st. 100095, Tashkent city, Republic of Uzbekistan;
Synthesis Problem Of Adaptive Control Systems For Multi-Channel And Multi-Mode Objects, Jasur Usmonovich Sevinov, Abdishukurov Maqsud O'G'Li Shavkat Mr, Nasriddin Xasanovich Bobomurodov
Chemical Technology, Control and Management
The issue of synthesis of an adaptive control system for multi-channel and multi-mode objects is considered. Development that of effective adaptive control algorithms for nonlinear dynamic systems ensure quality indicators of processes. In technological processes, it is necessary to control several parameters or several systems at the same time. For such a process control system, an adaptive control system is created. Work has been carried out on structural projects for the installation of adaptive systems. The stable requirements for the correction of adaptive control systems are seen. A review of several parametric deviation detections, based on the reference model and …
Trends In The Development And Improvement Of Glass Furnaces And Monitoring And Control Systems,
2023
Tashkent State Technical University, Adress: 100095, Republic of Uzbekistan, Tashkent, st. University, 2.
Trends In The Development And Improvement Of Glass Furnaces And Monitoring And Control Systems, N.R Yusupbekov, O'Tkir U. Xolmanov
Chemical Technology, Control and Management
The theory and practice of establishing industrial automation systems for glass furnaces and installations as they are right now are taken into consideration. Comparative analysis is based on publications over the last 20 years in the field being studied. On the basis of an analysis of the review materials, generalizations are made that form the basis for proposals aimed at modernizing and improving the technology and instrumentation of fuel combustion processes in gas-burning furnaces and installations, as well as monitoring and control systems for technological processes occurring in glass furnaces and installations.
Electromagnetic Transient Equivalent Modeling Method For Wind Power Clusters Adapted To Expected Faults,
2023
Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
Electromagnetic Transient Equivalent Modeling Method For Wind Power Clusters Adapted To Expected Faults, Dongsheng Li, Ye Liu, Yankan Song, Chen Shen
Journal of System Simulation
Abstract: Based on an existing equivalent modeling method for individual wind farm, an iterative simulation-based equivalent modeling method for wind power clusters is proposed and a software development for equivalent modeling of wind power clusters is completed by using CloudPSS-XStudio suite. The system integrates expected fault selection, equivalent parameter calculation and result analysis, which provides support for dynamic security assessment of power systems with large-scale wind power clusters. The equivalent method takes the average wind speed of each wind farm and the expected faults as input, and obtains the cluster index of each wind turbine based on the iterative simulation …
Key Technology And Application Of Digital Twin Modeling For Mri,
2023
College of Medical Imaging, Shanghai University of Medicine & Health Science, Shanghai 201318, China
Key Technology And Application Of Digital Twin Modeling For Mri, Shanshan Chen, Hongzhi Wang, Tian Xia
Journal of System Simulation
Abstract: With the accelerating digitalization in education, the construction of digital resources and application platforms has caught increasing attention. The framework of MRI equipment digital twin fivedimensional model is constructed to solve the problems in teaching and training for magnetic resonance imaging (MRI). A modeling and simulation method based on the mechanism model is proposed. The multi-dimensional physical data are obtained to perform digital human modeling, and the virtual acquisition and image reconstruction method is proposed to generate images. The digital twin data are adopted for iterative optimization to implement the whole process of the three-dimensional visual operation including preparation …
Multichannel Low-Cost Sensor For Iaq Monitoring: Implementation And Guidelines,
2023
Louisiana State University at Baton Rouge
Multichannel Low-Cost Sensor For Iaq Monitoring: Implementation And Guidelines, Isaac Ntiamoah
LSU Master's Theses
Indoor air quality (IAQ) is adversely affected by both indoor and outdoor environments, and rental homes occupied by low-income families suffer the most. Poor indoor air can be detrimental to the health of occupants, especially for susceptible populations like those with respiratory diseases such as asthma. Although IAQ monitoring is necessary, it is a challenging, costly, and time-intensive task. Moreover, the protocol for assessing IAQ in residential settings varies, and additional research is needed to establish a standard operating procedure that incorporates new monitoring technologies, such as low-cost air sensors. However, there is a dearth of comprehensive, evidence-based protocols for …
A Precise Attention Tracking System Based On Computer Vision,
2023
School of Electrical Engineering, Nantong University, Nantong 226019 China
A Precise Attention Tracking System Based On Computer Vision, Jiyuan Liu, Hanwen Qi, Zhicheng Liu, Minrui Fei, Kun Zhang
Journal of System Simulation
Abstract: A precise attention tracking system based on machine vision is designed to address the difficulty in studying students' attention allocation. The system includes an image capture device and an accurate attention tracking algorithm. The image capture device can capture the clearer ocular images. The pupil center localization algorithm replaces VGG16 with lightweight MobileNetv3 and uses twostage feature fusion and center keypoint prediction techniques to improve the speed and accuracy. The algorithm achieves a speed of up to 36 frames/s and 97.42% accuracy. The gaze tracking algorithm compensates for the head movements to achieve the meticulous gaze tracking. An interactive …
Reliability Evaluation Method Of Radar Simulation Model Based On Air Combat Mechanism,
2023
Shenyang Aircraft Design and Research Institute, AVIC, Shenyang 110035, China
Reliability Evaluation Method Of Radar Simulation Model Based On Air Combat Mechanism, Chenguang Wang, Jinpeng Bai, Tingting Li, Lifeng Miao, Kaifeng Wang
Journal of System Simulation
Abstract: In modern air combat simulation, the reliability of radar simulation model is very important. Based on simulation model VV&A theory, a cropped and suitable for engineering applications simulation model reliability evaluation method is proposed. Based on the analysis of radar use mechanism in medium and long range air combat and short range air combat is analyzed,, the requirement of radar model in air combat simulation system, the evaluation index system is established, and the reliability quantification method based on JS dispersion is proposed, which further enriches the base of basic method. The test case is designed, the simulation test …
A Fuzzy Group Decision-Making-Based Method For Green Supplier Selection And Order Allocation,
2023
School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China
A Fuzzy Group Decision-Making-Based Method For Green Supplier Selection And Order Allocation, Lu Liu, Wenxin Li, Xiao Song, Bingli Sun, Guanghong Gong
Journal of System Simulation
Abstract: With the intensity of market competitiveness, the worsening of the global environment, and the improvement of public concern about environmental protection, the issue of green purchasing has received considerable attention. The vast majority of existing studies on green purchasing have concentrated on supplier selection with green criteria, so as to realize sustainable operations, whereas it is more feasible and economical for businesses to obtain the proper products from adaptable and suitable suppliers at the right times, rates, and volumes, which is referred to as supplier selection and order allocation. To resolve the aforementioned two crucial challenges, we propose a …
A Hybrid Empirical Method For Fast Modeling Of Ship Manoeuvring Motion,
2023
Guizhou Waterway Bureau, Guiyang 550000, China
A Hybrid Empirical Method For Fast Modeling Of Ship Manoeuvring Motion, Peng Wu, Zongmo Yang, Qianfeng Jing, Yulin Li
Journal of System Simulation
Abstract: Simulation testing is an important means to verify the functions of intelligent ships. Ship maneuvering motion modeling and simulation is the key theoretical basis for the intelligent collision avoidance of multiple vessels in complex sea areas. To address the problem that the calculation of the hydrodynamic coefficients required for ship maneuvering modeling is complex and difficult to obtain, a hybrid empirical method is proposed, a combination method of the existing regression methods is established, the comprehensive performance indicators are constructed, the optimal hydrodynamic coefficients groups are selected by simulated maneuvering experiments, and a rapid modeling program code is developed …
Modeling And Analysis On Scattering Characteristics Automatic Driving Radar Bands In Rainy Environment,
2023
School of Electronic Information Engineering, Beihang University, Beijing 100191, China
Modeling And Analysis On Scattering Characteristics Automatic Driving Radar Bands In Rainy Environment, Mengfan Zou, Xiaoyu He
Journal of System Simulation
Abstract: The operating frequency band of modern communication and radar systems has extended to millimeter wave and terahertz frequency band, and the analysis on propagation characteristics of electromagnetic signals in rainy environment is important. A calculation model through Mie scattering theory is built to simulate the attenuation and the scattering of electromagnetic signals in rainy environments. Different types of raindrop size distribution function are adopted to analyze the propagation attenuation under different rainfall of frequencies spanning from 1 GHz to 1 THz. Experimental results are compared with international telecommunication union (ITU) half-empirical model to verify the validation of the model. …
Integrated Scheduling Simulation Based On Improved Moth Flame Optimizer,
2023
School of Mechanical Engineering, Shenyang University, Shenyang 110044, China
Integrated Scheduling Simulation Based On Improved Moth Flame Optimizer, Tianrui Zhang, Huiyuan Niu, Wei Xie
Journal of System Simulation
Abstract: Aiming at the rising cost of manufacturing enterprises, a mathematical programming model of integrated scheduling of production and transportation is established, and a double adaptive weights for moth flame optimizer(DAWMFO) is proposed. A double adaptive weight mechanism is proposed. The spiral function is used to update the population, which improves the convergence speed and accuracy of the algorithm. The benchmark function is tested by the improved algorithm. The results show that the improved algorithm can converge quickly and not easily fall into local optimum. Compared with other algorithms, the optimization ability is also improved. Through the simulation experiment on …
Simulation And Research Of Manipulator Motion Strategy Based On Adaptive Dynamic Programming,
2023
Engineering Research Center of Internet of Things Technology Applications Ministry of Education, Jiangnan University, Wuxi 214122, China
Simulation And Research Of Manipulator Motion Strategy Based On Adaptive Dynamic Programming, Ming Li, Qun Xu, Yan Wang, Zhicheng Ji
Journal of System Simulation
Abstract: Aiming at the difficulty of manipulator to realize high-precision motion tracking in complex and harsh environment, a strategy method based on the combination of adaptive dynamic programming (ADP) and sliding mode admittance control is proposed. The unknown environment is modeled as a linear model and based on quasi, a sliding mode admittance controller is derived to resist disturbance interference. An optimal control method that combines ADP with sliding mode admittance controller is proposed, in which the definition of R-matrix in value function is optimized and improved to further improve the tracking accuracy. The neural network based on ADP is …
