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On weakly regular semigroups characterized in terms of interval valued Q-fuzzy subsemigroups with thresholds (α,β) 具有阈值(α，β)的区间值Q-fuzzy子半群的弱正则半群
Journal of Mathematical and Computational Science Pub Date : 2022-01-01 DOI: 10.28919/jmcs/7154
Kasitra Neanhean
{"title":"On weakly regular semigroups characterized in terms of interval valued Q-fuzzy subsemigroups with thresholds (α,β)","authors":"Kasitra Neanhean","doi":"10.28919/jmcs/7154","DOIUrl":"https://doi.org/10.28919/jmcs/7154","url":null,"abstract":"unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Abstract. In this article, we provide relationship between interval valued Q-fuzzy interior ideals with thresholds (α,β ) and interval valued Q-fuzzy ideals with thresholds (α,β ). In the goal results, we proceed to characterize the simisimple semigroup by using interval valued Q-fuzzy interior ideals with thresholds (α,β ).","PeriodicalId":36607,"journal":{"name":"Journal of Mathematical and Computational Science","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88733377","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
New formula of degree distance index for some complex networks 一些复杂网络的度距离指数的新公式
Journal of Mathematical and Computational Science Pub Date : 2022-01-01 DOI: 10.28919/jmcs/7081
Laghridat Charifa, Essalih Mohamed
{"title":"New formula of degree distance index for some complex networks","authors":"Laghridat Charifa, Essalih Mohamed","doi":"10.28919/jmcs/7081","DOIUrl":"https://doi.org/10.28919/jmcs/7081","url":null,"abstract":"Mathematics plays an important role in various fields, one of them is graph theory. Graphs can be used to model many types of relations and processes in many domains such as solving problems related to mathematical chemistry by using topological indices. A topological index of a graph is a number that quantifies the structure of the graph. It is used for modeling the biological and chemical properties of molecules in QSPR (Qualitative Structure-Property Relationships) and QSAR (Qualitative Structure-Activity Relationships) studies. The Degree Distance index DD(G) is one of the important topological indices. In this paper, we are going to determine DD(G) for some complex graphs like: Star vertex’s graph (SV ), Star edge’s graph (SE), and Path’s graph (P).","PeriodicalId":36607,"journal":{"name":"Journal of Mathematical and Computational Science","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77752495","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: 2
Some properties of k-generalized Mittag Leffler function related to fractional calculus 关于分数阶微积分的k-广义Mittag - Leffler函数的一些性质
Journal of Mathematical and Computational Science Pub Date : 2022-01-01 DOI: 10.28919/jmcs/7111
Krishna Gopal Bhadana, A. Meena, V. Mishra
{"title":"Some properties of k-generalized Mittag Leffler function related to fractional calculus","authors":"Krishna Gopal Bhadana, A. Meena, V. Mishra","doi":"10.28919/jmcs/7111","DOIUrl":"https://doi.org/10.28919/jmcs/7111","url":null,"abstract":"unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Abstract. This paper deals with the k-new generalized Mittag Leffler function. Some of its properties related to fractional calculus are presented viz. k-Weyl fractional integral and k-extended Euler beta integral transform, Whittaker integral transform. Some important special cases of the main results are also have been discussed.","PeriodicalId":36607,"journal":{"name":"Journal of Mathematical and Computational Science","volume":"39 4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90475151","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
Improving the accuracy of the machine learning predictive models for analyzing CHD dataset 提高机器学习预测模型在冠心病数据分析中的准确性
Journal of Mathematical and Computational Science Pub Date : 2022-01-01 DOI: 10.28919/jmcs/6647
Georgiev Ivanov
{"title":"Improving the accuracy of the machine learning predictive models for analyzing CHD dataset","authors":"Georgiev Ivanov","doi":"10.28919/jmcs/6647","DOIUrl":"https://doi.org/10.28919/jmcs/6647","url":null,"abstract":"The problem to classify big data is an important one in machine learning. There are multiple ways to classify data, but the support vector machine (SVM) has become a great tool for the data scientist. In this paper we examine several modifications of the support vector machine algorithm that achieve better efficiency in terms of accuracy, F1 precision and CPU time when classifying test observations in comparison to the standard SVM algorithm. To make the modifications faster than standard SVM we use a special methodology which splits the input dataset into n folds and combine it with input data transformations. Each time we execute the process, one of the folds is saved as a test subset and the rest of the folds are applied for training. The process is executed n times. In the proposed methodology we are looking for the pair of subsets which produces the highest accuracy result. This pair is saved as an output SVM model.","PeriodicalId":36607,"journal":{"name":"Journal of Mathematical and Computational Science","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81752277","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
Properties of multi anti L-fuzzy quotient group A of a group G 群G的多反l -模糊商群A的性质
Journal of Mathematical and Computational Science Pub Date : 2022-01-01 DOI: 10.28919/jmcs/6929
R. Muthuraj
{"title":"Properties of multi anti L-fuzzy quotient group A of a group G","authors":"R. Muthuraj","doi":"10.28919/jmcs/6929","DOIUrl":"https://doi.org/10.28919/jmcs/6929","url":null,"abstract":": In this Paper, the notion of multi anti L – fuzzy quotient group A of a group G determined by A and K is introduced and discussed its properties.","PeriodicalId":36607,"journal":{"name":"Journal of Mathematical and Computational Science","volume":"84 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86370061","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
Characterize weakly regular semigroups by using interval valued Q-fuzzy ideals with thresholds (α,β) 用带阈值(α，β)的区间值q -模糊理想刻画弱正则半群
Journal of Mathematical and Computational Science Pub Date : 2022-01-01 DOI: 10.28919/jmcs/7185
{"title":"Characterize weakly regular semigroups by using interval valued Q-fuzzy ideals with thresholds (α,β)","authors":"","doi":"10.28919/jmcs/7185","DOIUrl":"https://doi.org/10.28919/jmcs/7185","url":null,"abstract":"","PeriodicalId":36607,"journal":{"name":"Journal of Mathematical and Computational Science","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82646899","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
Crank-Nicolson approximation of fractional order for time fractional radon diffusion equation in soil medium 土壤介质中时间分数型氡扩散方程分数阶的Crank-Nicolson近似
Journal of Mathematical and Computational Science Pub Date : 2022-01-01 DOI: 10.28919/jmcs/7342
G. W. Shrimangale
{"title":"Crank-Nicolson approximation of fractional order for time fractional radon diffusion equation in soil medium","authors":"G. W. Shrimangale","doi":"10.28919/jmcs/7342","DOIUrl":"https://doi.org/10.28919/jmcs/7342","url":null,"abstract":". The basic aim of this paper is to study the analysis for the Crank-Nicolson finite difference approximation for time fractional radon diffusion equation (TFRDE) in soil medium. The equation expresses the concentration of radon as function of space and time in soil medium. We discuss the stability and convergence of the scheme. Graphically the numerical solution of the test problem is carried out with the help of mathematical software Mathematica.","PeriodicalId":36607,"journal":{"name":"Journal of Mathematical and Computational Science","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89576577","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
Complementary connected domination and connectivity domination number of an arithmetic graph G=Vn 算术图G=Vn的互补连通支配和连通支配数
Journal of Mathematical and Computational Science Pub Date : 2022-01-01 DOI: 10.28919/jmcs/6977
L. M. Jenitha, M. K. A. Jebitha
{"title":"Complementary connected domination and connectivity domination number of an arithmetic graph G=Vn","authors":"L. M. Jenitha, M. K. A. Jebitha","doi":"10.28919/jmcs/6977","DOIUrl":"https://doi.org/10.28919/jmcs/6977","url":null,"abstract":"A subset S of V is said to be a complementary connected dominating set if every vertex not in S is adjacent to some vertex in S and the sub graph induced by V − S is connected. The complementary connected domination number of the graph is denoted by γccd(G) and is defined as the minimum number of vertices which form a ccd-set. A set S of vertices in a graph G is a connectivity dominating set if every vertex not in S is adjacent to some vertex in S and the sub graph induced by V −S is not connected. The connectivity domination number κγ(G) is the minimum size of such set.","PeriodicalId":36607,"journal":{"name":"Journal of Mathematical and Computational Science","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89665359","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
Using genetic algorithm to construct a momentum-based stock fund 利用遗传算法构建动量型股票基金
Journal of Mathematical and Computational Science Pub Date : 2022-01-01 DOI: 10.28919/jmcs/6912
Koda Song, Song Tang
{"title":"Using genetic algorithm to construct a momentum-based stock fund","authors":"Koda Song, Song Tang","doi":"10.28919/jmcs/6912","DOIUrl":"https://doi.org/10.28919/jmcs/6912","url":null,"abstract":"Portfolio optimization is an important research field in modern finance. An important goal in portfolio optimization is to maximize risk-adjusted returns. In addition, momentum investing has gained a wide acceptance by asset managers. Besides, genetic algorithms (GA), which are based on the ideas of evolution and the concepts of Darwin’s natural selection, have been widely used to generate high-quality solutions to optimization problems. In this paper, we propose an approach using genetic algorithms to construct a momentum-based 130-30 stock fund. We use the Sharpe Ratio as the fitness function for portfolio evaluation and a Mean-Variance Model with Monte Carlo simulation to optimize the portfolio’s long and short positions. Using 2020 market data for the S&P500, our fund outperforms a variety of stock portfolios as well as the S&P500 ETF Fund SPY measured by Total Return, Sharpe Ratio, and Information Ratio.","PeriodicalId":36607,"journal":{"name":"Journal of Mathematical and Computational Science","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73294090","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 the discrete classical case to a 1−2 type relation 离散经典情形在1−2型关系中的应用
Journal of Mathematical and Computational Science Pub Date : 2022-01-01 DOI: 10.28919/jmcs/7226
{"title":"Application of the discrete classical case to a 1−2 type relation","authors":"","doi":"10.28919/jmcs/7226","DOIUrl":"https://doi.org/10.28919/jmcs/7226","url":null,"abstract":"","PeriodicalId":36607,"journal":{"name":"Journal of Mathematical and Computational Science","volume":"70 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78921675","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
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