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A new form of LSMR for solving linear systems and least-squares problems 求解线性系统和最小二乘问题的LSMR新形式
International Journal of Computing Science and Mathematics Pub Date : 2023-01-01 DOI: 10.1504/ijcsm.2023.134561
Maryam Mojarrab, Afsaneh Hasanpour, Somayyeh Ghadamyari
{"title":"A new form of LSMR for solving linear systems and least-squares problems","authors":"Maryam Mojarrab, Afsaneh Hasanpour, Somayyeh Ghadamyari","doi":"10.1504/ijcsm.2023.134561","DOIUrl":"https://doi.org/10.1504/ijcsm.2023.134561","url":null,"abstract":"The least squares minimal residual (LSMR) method of Fong and Saunders (2011) is an algorithm for solving linear systems Ax = b and least-squares problems min∥Ax - b∥2 that is analytically equivalent to the MINRES method applied to a normal equation ATAx = AT b so that the quantities ∥ATrk∥2 are minimised (where rk = b - Axk is the residual for current iterate xk). This method is based on the Golub-Kahan bidiagonalisation 1 process, which generates orthonormal Krylov basis vectors. Here, the Golub-Kahan bidiagonalisation 2 process is implemented in the LSMR algorithm. This substitution makes the algorithm simpler than the standard algorithm. Also, numerical results show the new form to be competitive.","PeriodicalId":45487,"journal":{"name":"International Journal of Computing Science and Mathematics","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135262350","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
Application of particle swarm optimisation algorithm in manipulator compliance control 粒子群优化算法在机械臂柔顺控制中的应用
International Journal of Computing Science and Mathematics Pub Date : 2023-01-01 DOI: 10.1504/ijcsm.2023.133641
Kai Guo, Zhi Bai, Zhilin Ma
{"title":"Application of particle swarm optimisation algorithm in manipulator compliance control","authors":"Kai Guo, Zhi Bai, Zhilin Ma","doi":"10.1504/ijcsm.2023.133641","DOIUrl":"https://doi.org/10.1504/ijcsm.2023.133641","url":null,"abstract":"In this study, the motion model and impedance control model of the 9-DOF manipulator are established, and the impedance parameters in the model are optimised using particle swarm optimisation (PSO) algorithm. The experimental data shows that in the linear motion experiment, the maximum relative oscillation error of each scheme based on fuzzy adaptive proportional, integral and differential (PID) algorithm, offline parameter adjustment method and PSO algorithm on the vertical axis is 3.44%, 6.74% and 5.82% respectively, and the process control time from the contact between the robot and the environment to the contact force stability is 2.57 s, 3.82 s and 2.04 s respectively. The experimental results show that the PSO optimised impedance parameters can significantly improve the compliance control effect of the manipulator.","PeriodicalId":45487,"journal":{"name":"International Journal of Computing Science and Mathematics","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135799461","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
Algebraic modelling of concurrent systems and its practical application 并发系统的代数建模及其实际应用
International Journal of Computing Science and Mathematics Pub Date : 2023-01-01 DOI: 10.1504/ijcsm.2023.133640
Weidong Tang, Shengnan Li, Huaxu Li
{"title":"Algebraic modelling of concurrent systems and its practical application","authors":"Weidong Tang, Shengnan Li, Huaxu Li","doi":"10.1504/ijcsm.2023.133640","DOIUrl":"https://doi.org/10.1504/ijcsm.2023.133640","url":null,"abstract":"For decades, formal methods have greatly contributed to the modelling and validation of concurrent systems. Event structure is a powerful and efficient formal method. However, the traditional event structure has some limitations, so it cannot describe the exchange process of data flow, but the exchange process of data flow is exactly one of the most important behaviour characteristics of concurrent systems. This paper formally defines a new event structure model based on data flow by means of symbolic computation and uses it for modelling the handling of objects by robots independently and cooperatively.","PeriodicalId":45487,"journal":{"name":"International Journal of Computing Science and Mathematics","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135799471","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
A novel distance measure for intuitionistic fuzzy sets and its application in pattern classification, medical diagnosis, and career determination 一种新的直觉模糊集距离测度及其在模式分类、医学诊断和职业选择中的应用
International Journal of Computing Science and Mathematics Pub Date : 2023-01-01 DOI: 10.1504/ijcsm.2023.10059831
Juthika Mahanta, Subhankar Jana, Anjali Patel, Joydeep Patowary
{"title":"A novel distance measure for intuitionistic fuzzy sets and its application in pattern classification, medical diagnosis, and career determination","authors":"Juthika Mahanta, Subhankar Jana, Anjali Patel, Joydeep Patowary","doi":"10.1504/ijcsm.2023.10059831","DOIUrl":"https://doi.org/10.1504/ijcsm.2023.10059831","url":null,"abstract":"","PeriodicalId":45487,"journal":{"name":"International Journal of Computing Science and Mathematics","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136372388","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
A novel six-dimensional hyperchaotic system with self-excited attractors and its chaos synchronisation 具有自激吸引子的六维超混沌系统及其混沌同步
IF 0.8
International Journal of Computing Science and Mathematics Pub Date : 2022-01-01 DOI: 10.1504/ijcsm.2022.10046285
Saad Fawzi Al Azzawi, Ahmed S. Al Obeidi
{"title":"A novel six-dimensional hyperchaotic system with self-excited attractors and its chaos synchronisation","authors":"Saad Fawzi Al Azzawi, Ahmed S. Al Obeidi","doi":"10.1504/ijcsm.2022.10046285","DOIUrl":"https://doi.org/10.1504/ijcsm.2022.10046285","url":null,"abstract":"","PeriodicalId":45487,"journal":{"name":"International Journal of Computing Science and Mathematics","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66727563","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
Efficient projective algorithm for linear fractional programming problem based on a linear programming formulation 基于线性规划公式的线性分式规划问题的高效投影算法
IF 0.8
International Journal of Computing Science and Mathematics Pub Date : 2022-01-01 DOI: 10.1504/IJCSM.2022.10051688
A. Bennani, D. Benterki
{"title":"Efficient projective algorithm for linear fractional programming problem based on a linear programming formulation","authors":"A. Bennani, D. Benterki","doi":"10.1504/IJCSM.2022.10051688","DOIUrl":"https://doi.org/10.1504/IJCSM.2022.10051688","url":null,"abstract":"","PeriodicalId":45487,"journal":{"name":"International Journal of Computing Science and Mathematics","volume":"16 1","pages":"35-45"},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66727616","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
Algebraic modeling of concurrent systems and its practical application 并发系统的代数建模及其实际应用
IF 0.8
International Journal of Computing Science and Mathematics Pub Date : 2022-01-01 DOI: 10.1504/ijcsm.2022.10057619
Shengnan Li, Weidong Tang, Huaxun Li
{"title":"Algebraic modeling of concurrent systems and its practical application","authors":"Shengnan Li, Weidong Tang, Huaxun Li","doi":"10.1504/ijcsm.2022.10057619","DOIUrl":"https://doi.org/10.1504/ijcsm.2022.10057619","url":null,"abstract":"","PeriodicalId":45487,"journal":{"name":"International Journal of Computing Science and Mathematics","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66727633","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
A novel six-dimensional hyperchaotic system with self-excited attractors and its chaos synchronisation 具有自激吸引子的六维超混沌系统及其混沌同步
IF 0.8
International Journal of Computing Science and Mathematics Pub Date : 2022-01-01 DOI: 10.1504/IJCSM.2022.122146
Ahmed S. Al-Obeidi, S. Al-Azzawi
{"title":"A novel six-dimensional hyperchaotic system with self-excited attractors and its chaos synchronisation","authors":"Ahmed S. Al-Obeidi, S. Al-Azzawi","doi":"10.1504/IJCSM.2022.122146","DOIUrl":"https://doi.org/10.1504/IJCSM.2022.122146","url":null,"abstract":"","PeriodicalId":45487,"journal":{"name":"International Journal of Computing Science and Mathematics","volume":"15 1","pages":"72-84"},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66727684","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
Predicting the amount of files required to fix a bug 预测修复错误所需的文件数量
IF 0.8
International Journal of Computing Science and Mathematics Pub Date : 2021-01-01 DOI: 10.1504/ijcsm.2021.10042387
Sara Al jdaeh, Sari Awwad, Sahar Idwan, A. Otoom, M. Hammad
{"title":"Predicting the amount of files required to fix a bug","authors":"Sara Al jdaeh, Sari Awwad, Sahar Idwan, A. Otoom, M. Hammad","doi":"10.1504/ijcsm.2021.10042387","DOIUrl":"https://doi.org/10.1504/ijcsm.2021.10042387","url":null,"abstract":"","PeriodicalId":45487,"journal":{"name":"International Journal of Computing Science and Mathematics","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66727551","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
An efficient resource deployment method for steam- based stochastic demands in distributed cloud platforms 分布式云平台中基于蒸汽的随机需求的有效资源部署方法
IF 0.8
International Journal of Computing Science and Mathematics Pub Date : 2020-12-10 DOI: 10.1504/ijcsm.2020.10034029
Yang Liu, Wei Wei, Heyang Xu
{"title":"An efficient resource deployment method for steam- based stochastic demands in distributed cloud platforms","authors":"Yang Liu, Wei Wei, Heyang Xu","doi":"10.1504/ijcsm.2020.10034029","DOIUrl":"https://doi.org/10.1504/ijcsm.2020.10034029","url":null,"abstract":"It has been a consensus that deploying geographically dispersed stream-based online services into distributed cloud platforms has gained exceptional advantages. Globally visiting services make user requests characterised with dramatic fluctuation, which introduces stochastic demands for various resources. In order to maximise satisfied user requests and guarantee quality-of-service under given expense budget, efficient resource deployment becomes the key to this problem. We propose a stochastic demand oriented resource deployment method with more profits and less time complexity. Experiments using simulated and realistic data indicate that proposed method can outperform existing algorithms by increasing the weighted summation of satisfied demands up to 37%, fit for all scenarios with heterogeneous distributed cloud resources.","PeriodicalId":45487,"journal":{"name":"International Journal of Computing Science and Mathematics","volume":"12 1","pages":"205-215"},"PeriodicalIF":0.8,"publicationDate":"2020-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46638700","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: 1
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