Int. J. Comput. Sci. Math.最新文献

Study on the hydrodynamic behaviour of journal bearing with herringbone grooved sleeve considering cavitation 考虑空化的人字槽套筒滑动轴承水动力特性研究

Int. J. Comput. Sci. Math. Pub Date : 2021-07-25 DOI: 10.1504/ijcsm.2021.10039885

Qiang He, Yu Chen, Kunpeng Wang

引用次数: 0

Dynamic multi-swarm pigeon-inspired optimisation 基于多群鸽子的动态优化

Int. J. Comput. Sci. Math. Pub Date : 2021-07-25 DOI: 10.1504/ijcsm.2021.116762

Yichao Tang, Bo Wei, Yinglong Zhang, Xiong Li, Xuewen Xia, Ling Gui

{"title":"Dynamic multi-swarm pigeon-inspired optimisation","authors":"Yichao Tang, Bo Wei, Yinglong Zhang, Xiong Li, Xuewen Xia, Ling Gui","doi":"10.1504/ijcsm.2021.116762","DOIUrl":"https://doi.org/10.1504/ijcsm.2021.116762","url":null,"abstract":"Pigeon-inspired optimisation (PIO) has shown favourable performance on global optimisation problems. However, it lacks the part of individual experience, which makes it prone to premature convergence when solving multimodal problems. Moreover, the landmark operator model in PIO may cause the population size to decrease too quickly, which is harmful for exploration. To overcome the shortcomings, a dynamic multi-swarm pigeon-inspired optimisation (DMS-PIO) is proposed in this research. In PIO, the entire population is divided into multiple swarms. During the evolutionary process, the size of each swarm can be dynamically adjusted, and the multiple swarms can be randomly regrouped. Relying on the dynamic adjustment of swarms' sized, exploration and exploitation are balanced in the initial evolutionary stage and last stage. Furthermore, the randomly regrouping schedule is used to keep the population diversity. To enhance the comprehensive performance of PIO, the map and compass operator and the landmark operator in it are conducted alternately in each generation. Experimental results between DMS-PIO and other five PIO algorithms demonstrate that our proposed DMS-PIO can avoid the premature convergence problem when solving multimodal problems, and yields more effective performance in complex continuous optimisation problems.","PeriodicalId":399731,"journal":{"name":"Int. J. Comput. Sci. Math.","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133783062","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

Effects of combination of therapies on chronic hepatitis B virus through resolution of an optimal control problem using comparative of direct method and Pontryagin's maximum principle 通过比较直接法和庞特里亚金极大值原理解决最优控制问题，联合治疗对慢性乙型肝炎病毒的影响

Int. J. Comput. Sci. Math. Pub Date : 2021-07-25 DOI: 10.1504/ijcsm.2021.116765

J. Ntaganda

引用次数: 0

Approximate solution of fractional differential equations using Shannon wavelet operational matrix method 用香农小波变换矩阵法近似求解分数阶微分方程

Int. J. Comput. Sci. Math. Pub Date : 2021-07-25 DOI: 10.1504/ijcsm.2021.10039882

J. Iqbal, R. Abass, Puneet Kumar

引用次数: 0

An improved flower pollination algorithm for solving nonlinear system of equations 一种求解非线性方程组的改进花授粉算法

Int. J. Comput. Sci. Math. Pub Date : 2021-07-25 DOI: 10.1504/ijcsm.2021.116759

Mohamed Abdel-Basset, Yongquan Zhou, S. Zaki, A. H. Zaied

{"title":"An improved flower pollination algorithm for solving nonlinear system of equations","authors":"Mohamed Abdel-Basset, Yongquan Zhou, S. Zaki, A. H. Zaied","doi":"10.1504/ijcsm.2021.116759","DOIUrl":"https://doi.org/10.1504/ijcsm.2021.116759","url":null,"abstract":"It is difficult to solve a system of nonlinear equations, especially for higher-order nonlinear equations when we do not have an efficient and reliable algorithm, even though much work has been done in this area. Newton's method and its improved form are widely used at present, but their convergence and performance characteristics can be highly sensitive to the initial guess of the solution, and the methods fail if the initial guess of the solution is inopportune. It is difficult to select a good initial guess for most systems of nonlinear equations. For this reason, it is necessary to find an efficient algorithm for systems of nonlinear equations. Metaheuristic optimisation algorithms have been proposed by many researchers to solve systems of nonlinear equations. The flower pollination algorithm (FPA) is a novel metaheuristic optimisation algorithm with quick convergence, but its population diversity and convergence precision can be limited in some applications. To enhance its exploitation and exploration abilities, in this paper, an elite opposition-based flower pollination algorithm (EFPA) has been applied for solving systems of nonlinear equations. The results show that the proposed algorithm is robust, has high convergence rate and precision, and can give satisfactory solutions of nonlinear equations.","PeriodicalId":399731,"journal":{"name":"Int. J. Comput. Sci. Math.","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133984366","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

Applications of the dynamic system and differential equations to Taiwan mortality 动态系统与微分方程在台湾死亡率之应用

Int. J. Comput. Sci. Math. Pub Date : 2021-07-25 DOI: 10.1504/ijcsm.2021.10039883

Yong-Shiuan Lee, Meng-Rong Li, Jengnan Tzeng, Tsung-Jui Chiang-Lin

引用次数: 0

Research on travel network structure based on normalised Laplacian spectrum 基于归一化拉普拉斯谱的出行网络结构研究

Int. J. Comput. Sci. Math. Pub Date : 2020-12-05 DOI: 10.1504/ijcsm.2020.10034031

Yang Sun, Hanhan Deng, Ling Zhao, Sumin Li, Zhenshi Zhang, Ronghua Du, Zhixiang Hou

引用次数: 1

Asymmetric convolution with densely connected networks 具有密集连接网络的非对称卷积

Int. J. Comput. Sci. Math. Pub Date : 2020-12-05 DOI: 10.1504/ijcsm.2020.10034030

Liejun Wang, Huanglu Wen, Jiwei Qin, Shuli Cheng

引用次数: 0

A Mathematical Model and Optimal Control for Listeriosis Disease from Ready-to-Eat Food Products 即食食品李斯特菌病的数学模型及最优控制

Int. J. Comput. Sci. Math. Pub Date : 2020-10-13 DOI: 10.1101/2020.10.11.20210856

C. W. Chukwu, F. Nyabadza, Joshua Kiddy K. Asamoah

{"title":"A Mathematical Model and Optimal Control for Listeriosis Disease from Ready-to-Eat Food Products","authors":"C. W. Chukwu, F. Nyabadza, Joshua Kiddy K. Asamoah","doi":"10.1101/2020.10.11.20210856","DOIUrl":"https://doi.org/10.1101/2020.10.11.20210856","url":null,"abstract":"Abstract: Ready-to-eat food (RTE) are foods that are intended by the producers for direct human consumption without the need for further preparation. The primary source of human Listeriosis is mainly through ingestion of contaminated RTE food products. Thus, implementing control strategies for Listeriosis infectious disease is vital for its management and eradication. In the present study, a deterministic model of Listeriosis disease transmission dynamics with control measures was analyzed. We assumed that humans are infected with Listeriosis either through ingestion of contaminated food products or directly with Listeria Monocytogenes in their environment. Equilibrium points of the model in the absence of control measures were determined, and their local asymptotic stability established. We formulate an optimal control problem and analytically give sufficient conditions for the optimality and the transversality conditions for the model with controls. Numerical simulations of the optimal control strategies were performed to illustrate the results. The numerical findings suggest that constant implementation of the joint optimal control measures throughout the modelling time will be more efficacious in controlling or reducing the Listeriosis disease. The results of this study can be used as baseline measures in controlling Listeriosis disease from ready-to-eat food products.","PeriodicalId":399731,"journal":{"name":"Int. J. Comput. Sci. Math.","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129412847","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: 6

Cosine kernel based density peaks clustering algorithm 基于余弦核的密度峰聚类算法

Int. J. Comput. Sci. Math. Pub Date : 2020-07-27 DOI: 10.1504/ijcsm.2020.10030824

Jiayuan Wang, Li Lv, Runxiu Wu, Tanghuai Fan, Ivan Lee

引用次数: 1