An International Journal of Optimization and Control: Theories & Applications (IJOCTA)最新文献_第2页

Dislocation hyperbolic augmented Lagrangian algorithm in convex programming 凸编程中的错位双曲增强拉格朗日算法

An International Journal of Optimization and Control: Theories & Applications (IJOCTA) Pub Date : 2024-04-07 DOI: 10.11121/ijocta.1402

Lennin Mallma Ramirez, Nelson Maculan, Adilson Elias Xavier, Vinicius Layter Xavier

引用次数: 0

A Fractional-order mathematical model to analyze the stability and develop a sterilization strategy for the habitat of stray dogs 分析流浪狗栖息地稳定性并制定绝育策略的分数阶数学模型

An International Journal of Optimization and Control: Theories & Applications (IJOCTA) Pub Date : 2024-03-30 DOI: 10.11121/ijocta.1418

Zafer Öztürk, Ali Yousef, Halis Bilgil, Sezer Sorgun

{"title":"A Fractional-order mathematical model to analyze the stability and develop a sterilization strategy for the habitat of stray dogs","authors":"Zafer Öztürk, Ali Yousef, Halis Bilgil, Sezer Sorgun","doi":"10.11121/ijocta.1418","DOIUrl":"https://doi.org/10.11121/ijocta.1418","url":null,"abstract":"Today, the socio-cultural lack of some countries with increased urbanization has led to the unconscious breeding of stray dogs. The failure to care for the offspring of possessive dogs or ignoring the responsibility to find a suitable family for the offspring increased the dog population on the streets and in the shelters. In this study, our main target is to analyze the habitat of stray dogs and the strategy of how to control the population without damaging the ecosystem of the species. For this aim, we establish a fractional-order differential equation system to investigate the fractal dimension with long-term memory that invovles two compartments; the non-sterilized dog population (x(t)) and the sterilized one (y(t)). Firstly, we analyze the stability of the equilibrium points using the Routh-Hurwitz criteria to discuss cases that should not affect the ecosystem of the dog population, but control the stray dog population in the habitat. Since the intervention to the stray dog population occurs at discrete time impulses, we use the Euler method's discretization process to analyse the local and global stability around the equilibrium points. Besides this, we show that the solutions of the system represent semi-cycle behaviors. At the end of the study, we use accurate data to demonstrate the sterilization rate of stray dogs in their habitat.","PeriodicalId":505378,"journal":{"name":"An International Journal of Optimization and Control: Theories & Applications (IJOCTA)","volume":"47 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140361550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rotor design optimization of a 4000 rpm permanent magnet synchronous generator using moth flame optimization algorithm 利用蛾焰优化算法优化 4000 转/分永磁同步发电机的转子设计

An International Journal of Optimization and Control: Theories & Applications (IJOCTA) Pub Date : 2024-03-26 DOI: 10.11121/ijocta.1407

Deniz Perin, A. D. Karaoglan, K. Yilmaz

{"title":"Rotor design optimization of a 4000 rpm permanent magnet synchronous generator using moth flame optimization algorithm","authors":"Deniz Perin, A. D. Karaoglan, K. Yilmaz","doi":"10.11121/ijocta.1407","DOIUrl":"https://doi.org/10.11121/ijocta.1407","url":null,"abstract":"The goal of this paper is to optimize the rotor design parameters of 4000 rpm permanent magnet synchronous generator. The factors namely embrace, offset, outer diameter, and magnet thickness are selected as the design parameters those will be optimized in order to hold the magnetic flux density (MFD) distribution and the flux density on stator teeth and stator yoke within a desirable range while maximizing efficiency. The numerical simulations are carried out in the Maxwell environment for this purpose. The mathematical relationships between the responses and the factors are then derived using regression modeling over the simulation data. Following the modeling phase, the moth flame optimization is applied to these regression models to optimize the rotor design parameters. The motivation is determining mathematical relation between the important design parameters of the high speed generator and the measured responses, when standard M530-50A lamination material is used and then to demonstrate the utility of MFO to the readers on this design problem. The optimum factor levels for embrace, offset, outer diameter, and magnet thickness are calculated as 0.68, 30, 161.56, and 8.92 respectively. Additionally, confirmations are done by using Maxwell and the efficiency is calculated as 94.85%, and magnetic distributions are calculated as 1.64, 0.26, and 0.93 Tesla for stator teeth flux density, stator yoke flux density, and MFD; respectively. The results show that the efficiency is maximized and the magnetic distributions are kept within an appropriate range.","PeriodicalId":505378,"journal":{"name":"An International Journal of Optimization and Control: Theories & Applications (IJOCTA)","volume":"112 29","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140379106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Proposing a novel mathematical model for hospital pneumatic system 提出医院气动系统的新型数学模型

An International Journal of Optimization and Control: Theories & Applications (IJOCTA) Pub Date : 2024-03-23 DOI: 10.11121/ijocta.1489

Büşra Takgil, R. Kara

{"title":"Proposing a novel mathematical model for hospital pneumatic system","authors":"Büşra Takgil, R. Kara","doi":"10.11121/ijocta.1489","DOIUrl":"https://doi.org/10.11121/ijocta.1489","url":null,"abstract":"Hospital Pneumatic Systems, specializing in pneumatic systems, are among the most essential components for hospitals. It offers efficient and cost-effective solutions to problems related to the transportation of various materials in hospitals. However, in existing systems, the need for compressed air is met without worrying about cost control and without depending on the sample transported, and this not only makes the system inefficient but also may cause sample degradation. The main purpose of this study is to provide speed/pressure control according to the type of material transported to eliminate the disadvantages of existing systems such as energy use and sample degradation. In this study, a new mathematical model is presented that can be used to make more energy-efficient hospital pneumatic systems. Although there are many studies on various pneumatic systems in the literature, there is not enough for the control of hospital pneumatic systems. According to the results obtained in this study, the system parameters were determined and the mathematical model of the system was obtained by using the Multivariate nonlinear regression method. A genetic algorithm was used to test the validity of the obtained mathematical model and to optimize the coefficient of the input parameters of the model. It is expected that this proposed model will contribute to the use of hospital pneumatic systems and provide a scientific and practical solution to the proposed mathematical model. The proposed mathematical model provides up to %43 more efficient transportation over the currently used system that has been tested.","PeriodicalId":505378,"journal":{"name":"An International Journal of Optimization and Control: Theories & Applications (IJOCTA)","volume":" 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140210933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Some results regarding observability and initial state reconstruction for time-fractional systems 关于时间分数系统的可观测性和初始状态重构的一些结果

An International Journal of Optimization and Control: Theories & Applications (IJOCTA) Pub Date : 2024-03-21 DOI: 10.11121/ijocta.1468

Hamza Ben Brahim, F. E. El Alaoui, Khalid Zguaid

引用次数: 0

New generalized integral transform via Dzherbashian--Nersesian fractional operator 通过 Dzherbashian--Nersesian 分数算子的新广义积分变换

An International Journal of Optimization and Control: Theories & Applications (IJOCTA) Pub Date : 2024-03-18 DOI: 10.11121/ijocta.1449

Rachid Belgacem, Ahmed Bokhari, D. Baleanu, S. Djilali

引用次数: 0

Examination and experimental comparison of dc/dc buck converter topologies used in wireless electric vehicle charging applications 对无线电动汽车充电应用中使用的直流/直流降压转换器拓扑结构进行研究和实验比较

An International Journal of Optimization and Control: Theories & Applications (IJOCTA) Pub Date : 2024-02-29 DOI: 10.11121/ijocta.1503

Hakan Akca, Ahmet Aktas

{"title":"Examination and experimental comparison of dc/dc buck converter topologies used in wireless electric vehicle charging applications","authors":"Hakan Akca, Ahmet Aktas","doi":"10.11121/ijocta.1503","DOIUrl":"https://doi.org/10.11121/ijocta.1503","url":null,"abstract":"The studies on Wireless Power Transfer (WPT) technology and peripherals in Electric Vehicle (EV) applications are intensifying. While the energy received from the WPT system is transferred to the EV battery, the direct current (dc)/dc converter circuits are used. The dc/dc buck converter topologies are one of them. The converter circuits must be highly efficient, lightweight, and compact to have a high range in EV vehicles. There are asynchronous buck, synchronous buck, and interleaved synchronous buck converter circuit topologies from the literature. In this study, the efficiency results of these circuit topologies were analyzed using MATLAB/Simulink and experimental studies. This study contributes to the literature by conducting circuit-level efficiency analysis and component-level power loss analysis. It has been observed that the interleaved synchronous buck converter circuit operates at 99% efficiency at 1066 W. In addition, it has been shared with the oscilloscope results that the current ripples of this circuit topology are lower than other circuit converters. Specifically, there has been a significant reduction of 56% in power losses, particularly in the interleaved synchronous buck converter (ISBC). This study analyzes the dynamic behavior of the dc/dc buck converter topologies, and results about their performance are given.","PeriodicalId":505378,"journal":{"name":"An International Journal of Optimization and Control: Theories & Applications (IJOCTA)","volume":"2 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140410318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical solution of coupled system of Emden-Fowler equations using artificial neural network technique 利用人工神经网络技术数值求解埃姆登-福勒方程耦合系统

An International Journal of Optimization and Control: Theories & Applications (IJOCTA) Pub Date : 2024-01-10 DOI: 10.11121/ijocta.1424

Ashish Kumar, Manoj Kumar, Parany Goswami

引用次数: 0

An approximate solution of singularly perturbed problem on uniform mesh 均匀网格上奇异扰动问题的近似解法

An International Journal of Optimization and Control: Theories & Applications (IJOCTA) Pub Date : 2024-01-10 DOI: 10.11121/ijocta.1414

D. Arslan, Ercan Çelik

引用次数: 0

Controllability of nonlinear fractional integrodifferential systems involving multiple delays in control 涉及多重延迟控制的非线性分数整微分系统的可控性

An International Journal of Optimization and Control: Theories & Applications (IJOCTA) Pub Date : 2024-01-07 DOI: 10.11121/ijocta.1428

Abdul Haq, N. Sukavanam

引用次数: 0

An International Journal of Optimization and Control: Theories &amp; Applications (IJOCTA)最新文献

An International Journal of Optimization and Control: Theories & Applications (IJOCTA)最新文献