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Discrete Dynamics in Nature and Society最新文献

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A Comparative Study of Particle Swarm Optimization and Artificial Bee Colony Algorithm for Numerical Analysis of Fisher’s Equation 粒子群算法与人工蜂群算法在Fisher方程数值分析中的比较研究
4区 数学
Discrete Dynamics in Nature and Society Pub Date : 2023-10-18 DOI: 10.1155/2023/9964744
Geeta Arora, Kiran Bala, Homan Emadifar, Masoumeh Khademi
{"title":"A Comparative Study of Particle Swarm Optimization and Artificial Bee Colony Algorithm for Numerical Analysis of Fisher’s Equation","authors":"Geeta Arora, Kiran Bala, Homan Emadifar, Masoumeh Khademi","doi":"10.1155/2023/9964744","DOIUrl":"https://doi.org/10.1155/2023/9964744","url":null,"abstract":"The aim of this research work is to obtain the numerical solution of Fisher’s equation using the radial basis function (RBF) with pseudospectral method (RBF-PS). The two optimization techniques, namely, particle swarm optimization (PSO) and artificial bee colony (ABC), have been compared for the numerical results in terms of errors, which are employed to find the shape parameter of the RBF. Two problems of Fisher’s equation are presented to test the accuracy of the method, and the obtained numerical results are compared to verify the effectiveness of this novel approach. The calculation of the error norms leads to the conclusion that the performance of PSO is better than the ABC algorithm to minimize the error for the shape parameter in a given range.","PeriodicalId":55177,"journal":{"name":"Discrete Dynamics in Nature and Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135883346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
State Feedback H∞ Control for Trajectory Tracking of an Unmanned Surface Vehicle 无人水面飞行器轨迹跟踪的状态反馈H∞控制
4区 数学
Discrete Dynamics in Nature and Society Pub Date : 2023-10-18 DOI: 10.1155/2023/5633737
Shufang Zhuo, Yonghui He, Yanwei Huang
{"title":"State Feedback H∞ Control for Trajectory Tracking of an Unmanned Surface Vehicle","authors":"Shufang Zhuo, Yonghui He, Yanwei Huang","doi":"10.1155/2023/5633737","DOIUrl":"https://doi.org/10.1155/2023/5633737","url":null,"abstract":"Aiming at the sway velocity and uncertainties such as wind, wave, and current, a state feedback H∞ control method is proposed to improve the dynamic and steady-state performance with line of sight (LOS) law for trajectory tracking of an unmanned surface vehicle (USV). First, a novel LOS is proposed for trajectory tracking with the position error to obtain the references of surge velocity and heading angle. Second, the LPV model is established with varying parameters of the sway velocity for the USV. Third, the closed-loop system for the LPV model is established by the state feedback H∞ control method to design the controller. Since the coupling term of system coefficients in the Lyapunov stability condition is difficult to solve directly, a novel variable is introduced to decouple the stability condition, which can be solved with MATLAB LMI tools for the controller parameters. Finally, the simulation result shows that the proposed method has super performance on the dynamic and steady-state indices.","PeriodicalId":55177,"journal":{"name":"Discrete Dynamics in Nature and Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135883796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evaluation of Land Use/Land Cover Changes due to Urban Sprawl in Bengaluru Rural, Karnataka, India 印度卡纳塔克邦邦班加罗尔农村城市扩张导致的土地利用/土地覆盖变化评价
4区 数学
Discrete Dynamics in Nature and Society Pub Date : 2023-10-17 DOI: 10.1155/2023/8077644
A. Bharath, M. Manjunatha, T. V. Reshma, Ranjitha B. Tangadagi, Sifatullah Bahij
{"title":"Evaluation of Land Use/Land Cover Changes due to Urban Sprawl in Bengaluru Rural, Karnataka, India","authors":"A. Bharath, M. Manjunatha, T. V. Reshma, Ranjitha B. Tangadagi, Sifatullah Bahij","doi":"10.1155/2023/8077644","DOIUrl":"https://doi.org/10.1155/2023/8077644","url":null,"abstract":"The availability of productive land is significantly impacted by the global phenomenon of urbanization. The amount of land available for food production and other essential activities decreases as cities grow because the urban perimeter encroaches on rural and natural areas. Conducting research on urban sprawl analysis and land use land cover (LULC) change assessment is essential in ensuring sustainable urban growth. Bengaluru, a rapidly expanding metropolitan city, has a significant impact on the area around it, making it a prime location for this kind of study. In this study, authors sought to assess how urban sprawl affected LULC in the Bengaluru rural district that surrounds the city of Bengaluru. The study evaluated changes in LULC over a two-decade period using remote sensing data and GIS tools. Five LULC classes were used to categorize the study area: settlement, waterbody, vegetation, agriculture, and barren land. The maximum likelihood technique was used to classify Landsat images from three different time periods using the supervised image classification method in the ERDAS software. Accuracy assessment was used to gauge the classified images’ accuracy. The study’s important findings showed how the LULC classes in the study area have been negatively impacted by the urban sprawl. The study emphasizes the significance of ongoing research in LULC change assessment and urban sprawl analysis to ensure sustainable urban growth and safeguard the availability of productive land.","PeriodicalId":55177,"journal":{"name":"Discrete Dynamics in Nature and Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135994595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fractional Derivative Model for Analysis of HIV and Malaria Transmission Dynamics HIV和疟疾传播动力学分析的分数阶导数模型
4区 数学
Discrete Dynamics in Nature and Society Pub Date : 2023-10-16 DOI: 10.1155/2023/5894459
Kumama Regassa Cheneke
{"title":"Fractional Derivative Model for Analysis of HIV and Malaria Transmission Dynamics","authors":"Kumama Regassa Cheneke","doi":"10.1155/2023/5894459","DOIUrl":"https://doi.org/10.1155/2023/5894459","url":null,"abstract":"In this study, a Caputo fractional derivative is employed to develop a model of malaria and HIV transmission dynamics with optimal control. Also, the model’s basic properties are shown, and the basic reproduction number is computed using the next-generation matrix method. Additionally, the order of fractional derivative analysis shows that the infected group decreases at the beginning for the higher-order of fractional derivative. Moreover, the early activation of memory effects through public health education reduces the impact of malaria and HIV infections on further progression and transmission. On the other hand, effective optimal controls reduce the occurrence and prevalence of HIV and malaria infections from the beginning to the end of the investigation. Finally, the numerical simulations are done for the justification of analytical solutions with numerical solutions of the model. Moreover, the MATLAB platform is incorporated for numerical simulation of the solutions.","PeriodicalId":55177,"journal":{"name":"Discrete Dynamics in Nature and Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136079419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research on a Model for an Empirical Analysis of Inherent Defect Insurance Based on Ruin Theory 基于破产理论的内在缺陷保险实证分析模型研究
4区 数学
Discrete Dynamics in Nature and Society Pub Date : 2023-10-13 DOI: 10.1155/2023/8845671
Xikang Yan, Zeyu Chen, Lida Wang, Qinyu Luo, Yunhan Yan, Tian Qiu, Peng Cheng, Shichao Wang
{"title":"Research on a Model for an Empirical Analysis of Inherent Defect Insurance Based on Ruin Theory","authors":"Xikang Yan, Zeyu Chen, Lida Wang, Qinyu Luo, Yunhan Yan, Tian Qiu, Peng Cheng, Shichao Wang","doi":"10.1155/2023/8845671","DOIUrl":"https://doi.org/10.1155/2023/8845671","url":null,"abstract":"The system of inherent defect insurance is an important measure to serve the real economy through financial means and improve the quality of construction projects, which is the future development direction of China’s construction industry. However, the related research is not perfect due to the short implementation of the insurance. This could bring risks to the promotion of insurance for companies. Insurance ruin theory is an important method in risk management theory, so adopting it to manage the risk inherent defect insurance from the perspective of insurance companies is vital. The research starts with the classic insurance ruin theory and determines the coefficient of premium collection from the perspective of claim settlement distribution expectations. Furthermore, the approximate distribution of claim settlement is deduced, and a comprehensive risk assessment model is constructed. Finally, based on the data of insurance actuarial practice in Shanghai, both the ruin probability of inherent defect insurance in each insuring term and its average required initial reserve are calculated, which provides the analyses on the risks and main subitems of inherent defect insurance as well as relevant suggestions. Finally, the sensitivity analysis is used to further analyse the risk of different insurance stages of IDI, and the relevant measures are proposed. The research can provide theoretical assistances for insurance companies to carry out effective risk management and provide model tools to make scientific decisions.","PeriodicalId":55177,"journal":{"name":"Discrete Dynamics in Nature and Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135854318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An Impulse-Quantizing Synchronization Approach for Mixed Continuous-Discrete Complex Networks 连续-离散混合复杂网络的脉冲量化同步方法
4区 数学
Discrete Dynamics in Nature and Society Pub Date : 2023-10-13 DOI: 10.1155/2023/7273140
Na Hu, Luyan Li, Honghua Bin, Zhenkun Huang
{"title":"An Impulse-Quantizing Synchronization Approach for Mixed Continuous-Discrete Complex Networks","authors":"Na Hu, Luyan Li, Honghua Bin, Zhenkun Huang","doi":"10.1155/2023/7273140","DOIUrl":"https://doi.org/10.1155/2023/7273140","url":null,"abstract":"This paper presents synchronization of mixed continuous-discrete complex network via impulse-quantizing approach. A delay-partitioning group strategy is proposed and impulse-quantizing control is designed to derive theoretical criteria ensuring scale-type synchronization of complex networks. Our results show that synchronization of mixed continuous-discrete complex networks can be realized by controlling delay-partitioning subgroup nodes with impulsive quantization. The theoretical results give scale-limited sufficient conditions for quantized synchronization relying on control gains, impulsive intervals, and delays. A numerical simulation is given to demonstrate the effectiveness of the theoretical results.","PeriodicalId":55177,"journal":{"name":"Discrete Dynamics in Nature and Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135854858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Retracted: Measurement of Coordinated and Coupled Development and Evaluation of Sustainable Development for Marine Economic-Ecological Complex System 海洋经济-生态复合系统协调耦合发展测度与可持续发展评价
4区 数学
Discrete Dynamics in Nature and Society Pub Date : 2023-10-11 DOI: 10.1155/2023/9783535
Discrete Dynamics in Nature and Society
{"title":"Retracted: Measurement of Coordinated and Coupled Development and Evaluation of Sustainable Development for Marine Economic-Ecological Complex System","authors":"Discrete Dynamics in Nature and Society","doi":"10.1155/2023/9783535","DOIUrl":"https://doi.org/10.1155/2023/9783535","url":null,"abstract":"<jats:p />","PeriodicalId":55177,"journal":{"name":"Discrete Dynamics in Nature and Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136062525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Retracted: Summary and Evaluation of the Application of Knowledge Graphs in Education 2007–2020 2007-2020知识图谱在教育中的应用综述与评价
4区 数学
Discrete Dynamics in Nature and Society Pub Date : 2023-10-11 DOI: 10.1155/2023/9842595
Discrete Dynamics in Nature and Society
{"title":"Retracted: Summary and Evaluation of the Application of Knowledge Graphs in Education 2007–2020","authors":"Discrete Dynamics in Nature and Society","doi":"10.1155/2023/9842595","DOIUrl":"https://doi.org/10.1155/2023/9842595","url":null,"abstract":"<jats:p />","PeriodicalId":55177,"journal":{"name":"Discrete Dynamics in Nature and Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136064087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Retracted: The Equilibrium Mechanism of Interest Distribution in Farmland Transfer: Based on the Perspective of the Three-Party Game 农地流转中利益分配的均衡机制——基于三方博弈的视角
4区 数学
Discrete Dynamics in Nature and Society Pub Date : 2023-10-11 DOI: 10.1155/2023/9792469
Discrete Dynamics in Nature and Society
{"title":"Retracted: The Equilibrium Mechanism of Interest Distribution in Farmland Transfer: Based on the Perspective of the Three-Party Game","authors":"Discrete Dynamics in Nature and Society","doi":"10.1155/2023/9792469","DOIUrl":"https://doi.org/10.1155/2023/9792469","url":null,"abstract":"<jats:p />","PeriodicalId":55177,"journal":{"name":"Discrete Dynamics in Nature and Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136062521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Retracted: Construction and Application of the Online Finance Credit Risk Rating Model Based on the Artificial Neural Network 基于人工神经网络的在线金融信用风险评级模型的构建与应用
4区 数学
Discrete Dynamics in Nature and Society Pub Date : 2023-10-11 DOI: 10.1155/2023/9812363
Discrete Dynamics in Nature and Society
{"title":"Retracted: Construction and Application of the Online Finance Credit Risk Rating Model Based on the Artificial Neural Network","authors":"Discrete Dynamics in Nature and Society","doi":"10.1155/2023/9812363","DOIUrl":"https://doi.org/10.1155/2023/9812363","url":null,"abstract":"<jats:p />","PeriodicalId":55177,"journal":{"name":"Discrete Dynamics in Nature and Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136062523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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