Malaysian Journal of Mathematical Sciences最新文献

The Effect of Alternative Resource and Refuge on the Dynamical Behavior of Food Chain Model 替代资源和避难所对食物链模型动态行为的影响

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Malaysian Journal of Mathematical Sciences Pub Date : 2023-12-14 DOI: 10.47836/mjms.17.4.13

Z. M. Hadi, D. K. Bahlool

引用次数: 0

Decomposition of kth Order Slant Toeplitz Operators k 阶斜线托普利兹算子的分解

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Malaysian Journal of Mathematical Sciences Pub Date : 2023-12-14 DOI: 10.47836/mjms.17.4.14

K. P. Singh, M. P. Singh,, A. J. Sanasam,

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On the 2-Token Graphs of Some Disjoint Union of Graphs 论某些不相连的图联盟的 2 标记图

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Malaysian Journal of Mathematical Sciences Pub Date : 2023-12-14 DOI: 10.47836/mjms.17.4.12

Y. Susanti,

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A Pairing-free Provable Secure and Efficient Identity-based Identification Scheme with Anonymity 无配对可证明的安全高效匿名身份识别方案

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Malaysian Journal of Mathematical Sciences Pub Date : 2023-12-14 DOI: 10.47836/mjms.17.4.11

R. Kannan, J. J. Chin,, V. T. Goh, S. C. Yip

引用次数: 0

Invariance Analysis and Closed-form Solutions for The Beam Equation in Timoshenko Model 季莫申科模型中梁方程的不变性分析和闭式解法

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Malaysian Journal of Mathematical Sciences Pub Date : 2023-12-14 DOI: 10.47836/mjms.17.4.05

S. M. Al-Omari,, Akhtar Hussain, Muhammad Usman, F. D. Zaman,

{"title":"Invariance Analysis and Closed-form Solutions for The Beam Equation in Timoshenko Model","authors":"S. M. Al-Omari,, Akhtar Hussain, Muhammad Usman, F. D. Zaman,","doi":"10.47836/mjms.17.4.05","DOIUrl":"https://doi.org/10.47836/mjms.17.4.05","url":null,"abstract":"Our research focuses on a fourth-order partial differential equation (PDE) that arises from the Timoshenko model for beams. This PDE pertains to situations where the elastic moduli remain constant and an external load, represented as F, is applied. We thoroughly analyze Lie symmetries and categorize the various types of applied forces. Initially, the principal Lie algebra is two-dimensional, but in certain noteworthy cases, it extends to three dimensions or even more. For each specific case, we derive the optimal system, which serves as a foundation for symmetry reductions, transforming the original PDE into ordinary differential equations. In certain instances, we successfully identify exact solutions using this reduction process. Additionally, we delve into the conservation laws using a direct method proposed by Anco, with a particular focus on specific classes within the equation. The findings we have presented in our study are indeed original and innovative. This study serves as compelling evidence for the robustness and efficacy of the Lie symmetry method, showcasing its ability to provide valuable insights and solutions in the realm of mathematical analysis.","PeriodicalId":43645,"journal":{"name":"Malaysian Journal of Mathematical Sciences","volume":"31 6","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138972005","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

On the Optimal System and Series Solutions of Fifth-Order Fujimoto-Watanabe Equations 论五阶藤本-渡边方程的最优系统和数列解

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Malaysian Journal of Mathematical Sciences Pub Date : 2023-12-14 DOI: 10.47836/mjms.17.4.03

B. Gwaxa, S. Jamal,, A. G. Johnpillai

引用次数: 0

Pricing Quanto Options in Renewable Energy Markets 可再生能源市场中广义期权的定价

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Malaysian Journal of Mathematical Sciences Pub Date : 2023-12-14 DOI: 10.47836/mjms.17.4.02

N. A. A. Arsat,, N. A. Ibrahim, C. M. I. C. Taib

{"title":"Pricing Quanto Options in Renewable Energy Markets","authors":"N. A. A. Arsat,, N. A. Ibrahim, C. M. I. C. Taib","doi":"10.47836/mjms.17.4.02","DOIUrl":"https://doi.org/10.47836/mjms.17.4.02","url":null,"abstract":"High level of greenhouse gases emission in fossil fuels has induced a significant transition from conventional energy sources to renewable energy. However, using renewable energy in electricity grids has limitations, such as intermittency and lack of efficient energy storage. This paper focuses on constructing the quanto options contract to help renewable energy producers hedge the risk against low photovoltaic (PV) production and electricity prices. To achieve our objective, we first model the interday PV power production with a combination of a deterministic and stochastic model. We analyse empirical data for daily solar production in three operators in Germany ranging from 1 January 2016 to 31 December 2020. We discovered that all estimated parameters of the deterministic process are highly significant. Meanwhile, we use an autoregressive (AR) process to describe the random behavior in the production. The results demonstrated that AR(2) is suitable enough to explain its stochastic factor. For the error terms analysis, we observed a clear sign of seasonal heteroskedasticity supported by the left skewed density. In addition, we observed a clear seasonal pattern in the squared error terms, where we suggest using seasonal variance and skewed normal distribution to describe its dynamic. As for an application, we embed the PV model in the power price modeling. We found that AR(3) process is sufficient to explain the price behavior and that normal distribution best fits the error terms. Using the suggested PV and power price model, we construct the quanto options contract for renewable energy producers using Monte Carlo simulations. We discovered that the electricity price payoffs are consistent throughout the year, whereas PV and quanto options payoffs vary greatly depending on the season. The quanto options price result shows that the prices vary during four seasons, with the highest variation in July.","PeriodicalId":43645,"journal":{"name":"Malaysian Journal of Mathematical Sciences","volume":"18 3","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138971005","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 Study of Families of Bistar and Corona Product of Graph: Reverse Topological Indices 图形的比斯塔和日冕积族研究：逆拓扑索引

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Malaysian Journal of Mathematical Sciences Pub Date : 2023-12-14 DOI: 10.47836/mjms.17.4.04

K. Gowtham, M. N. Husin,

引用次数: 0

Richardson Iterative Method for Solving Multi-Linear System with M-Tensor 用 M 张量求解多线性系统的理查森迭代法

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Malaysian Journal of Mathematical Sciences Pub Date : 2023-12-14 DOI: 10.47836/mjms.17.4.08

Y. Liang,, A. Ibrahim,, Z. Omar,

引用次数: 0

An Application on an Information System via Nano Ordered Topology 通过纳米有序拓扑结构在信息系统中的应用

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Malaysian Journal of Mathematical Sciences Pub Date : 2023-12-14 DOI: 10.47836/mjms.17.4.01

S. H. Shalil, S. A. El-Sheikh, S. A. Kandil

{"title":"An Application on an Information System via Nano Ordered Topology","authors":"S. H. Shalil, S. A. El-Sheikh, S. A. Kandil","doi":"10.47836/mjms.17.4.01","DOIUrl":"https://doi.org/10.47836/mjms.17.4.01","url":null,"abstract":"Rough set theory is commonly used to handle uncertainty in various applications. In order to broaden its application scope, the classical rough set model based on equivalence relations, it has been extended to include an additional partial order relation. This partial order relation represents an m-nano flou set, as defined in Section 5, between rough sets and is particularly useful in determining the levels of impact that key factors have on heart failure. The primary objective of the current research is to introduce a novel approximation method based on equivalence relations and partial order relations (ordered approximation spaces), which extends Pawlak's method and investigates related results. The paper establishes the equivalence between our approach and Pawlak's approach under the condition that we have an equivalence relation and a partial order relation that satisfies the criteria required for it to be considered an equality relation. The second objective is to extend the concept of nano topology to include nano ordered topology, which involves nano increasing or decreasing topological spaces. The research indicates that incorporating nano increasing or decreasing topological spaces results in enhanced data analysis accuracy when compared to solely utilizing nano topological spaces. This observation aligns with the discussions in the referenced work by Jayalakshmi. The findings of this research have the potential to significantly impact medical research related to heart failure. Improved methods for handling uncertainty and quantifying the influence of various factors can lead to more accurate and reliable predictions and diagnoses. Ultimately, this work aims to contribute to advancements in heart failure treatment and prevention. By bridging the gap between traditional rough set theory and the nuanced intricacies of heart failure analysis, our research strives to advance our comprehension of this critical medical condition and, in turn, support progress in heart failure treatment and prevention.","PeriodicalId":43645,"journal":{"name":"Malaysian Journal of Mathematical Sciences","volume":"13 9","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139002501","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