International Journal of Mathematical, Engineering and Management Sciences最新文献

Nonpolynomial Spline for Numerical Solution of Singularly Perturbed Convection-Diffusion Equations with Discontinuous Source Term 非多项式样条曲线用于数值求解具有不连续源项的奇异扰动对流扩散方程

International Journal of Mathematical, Engineering and Management Sciences Pub Date : 2024-06-01 DOI: 10.33889/ijmems.2024.9.3.032

Shilpkala T. Mane, R. Lodhi

引用次数: 0

An Overview of Multi-Criteria Decision Analysis and the Applications of AHP and TOPSIS Methods 多标准决策分析概述以及 AHP 和 TOPSIS 方法的应用

International Journal of Mathematical, Engineering and Management Sciences Pub Date : 2024-06-01 DOI: 10.33889/ijmems.2024.9.3.030

S. Chaube, Sangeeta Pant, Anuj Kumar, Shaurya Uniyal, M. K. Singh, K. Kotecha, Akshay Kumar

引用次数: 0

Importance-based Resilience Assessment and Optimization of Unmanned Ship Swarm System 基于重要性的无人船群系统复原力评估与优化

International Journal of Mathematical, Engineering and Management Sciences Pub Date : 2024-06-01 DOI: 10.33889/ijmems.2024.9.3.031

Hongyan Dui, Kailong Zhang, Wanyun Xia

引用次数: 0

Impact of Carbon Emission Policy on Fresh Food Supply Chain Model for Deteriorating Imperfect Quality Items 碳排放政策对生鲜食品供应链不完美质量恶化模型的影响

International Journal of Mathematical, Engineering and Management Sciences Pub Date : 2024-06-01 DOI: 10.33889/ijmems.2024.9.3.027

Anil Dhanda, Mandeep Mittal, S. Chawla, Jagdish Prasad

{"title":"Impact of Carbon Emission Policy on Fresh Food Supply Chain Model for Deteriorating Imperfect Quality Items","authors":"Anil Dhanda, Mandeep Mittal, S. Chawla, Jagdish Prasad","doi":"10.33889/ijmems.2024.9.3.027","DOIUrl":"https://doi.org/10.33889/ijmems.2024.9.3.027","url":null,"abstract":"Carbon emissions can be decreased by adopting the carbon cap-and-alternate policy. The current study suggests a carbon buying and selling mechanism for things that are deteriorating or of poor quality while taking into account chilled logistics services in a fresh food supply chain. In addition to deliveries of perishables, suppliers also provide retailers with chilled logistics services and carbon emission certificates for excess inventory. The retail price, the cost of chilled strategies, and the contributions to various carbon trading options—such as internal carbon trade, external carbon exchange, and carbon exchange both internally and externally for the destruction of low-quality goods have all been evaluated in this paper. The store network members give estimating systems to new food, emanation permits and refrigerated planned operations administrations. We likewise uncover the connection between carbon purchasing and advancing and refrigerated strategies administrations and test out their joint effect on the provider retailer's helpful dating. Store network donors are also encouraged to participate in the carbon exchanging mechanism, which benefits from more sophisticated asset utilisation and more ruthless stockpile chains. The numerical examples have helped to validate the results. In the end, a thorough sensitivity analysis has been provided.","PeriodicalId":517298,"journal":{"name":"International Journal of Mathematical, Engineering and Management Sciences","volume":"74 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141234345","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

Two Discrete-time Age-based Replacement Problems with/without Discounting 有/无贴现的两个基于年龄的离散时间置换问题

International Journal of Mathematical, Engineering and Management Sciences Pub Date : 2024-06-01 DOI: 10.33889/ijmems.2024.9.3.021

Jingchi Wu, Cunhua Qian, Tadashi Dohi

{"title":"Two Discrete-time Age-based Replacement Problems with/without Discounting","authors":"Jingchi Wu, Cunhua Qian, Tadashi Dohi","doi":"10.33889/ijmems.2024.9.3.021","DOIUrl":"https://doi.org/10.33889/ijmems.2024.9.3.021","url":null,"abstract":"This paper considers two classical age-based replacement models within a discrete-time framework: a standard age replacement model and an opportunistic age replacement model. Specifically, our analysis incorporates the concept of replacement priority in situations where failure replacement and preventive replacement occur at a given age or opportunity. We explore two priority cases within each replacement model. First, we formulate optimal preventive replacement policies aimed at minimizing the associated expected cost rate in the age replacement model and the opportunistic age replacement model by the familiar renewal reward argument. Next, we extend the findings presented earlier to scenarios involving discounting. We develop formulations for the expected total discounted costs over an infinite time horizon and obtain optimal preventive replacement policies minimizing these total expected costs. Additionally, we explore unified models incorporating probabilistic priority. To provide practical insights, we present numerical illustrations using real failure data from pole air switches, comparing the performance of these optimal preventive policies.","PeriodicalId":517298,"journal":{"name":"International Journal of Mathematical, Engineering and Management Sciences","volume":"84 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141231206","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 Approach for Implementing and Optimizing Proportional-Resonant Controller and L-C-L Filter for Single-Phase Grid-tie Inverter 实施和优化单相并网逆变器比例-谐振控制器和 L-C-L 滤波器的新方法

International Journal of Mathematical, Engineering and Management Sciences Pub Date : 2024-06-01 DOI: 10.33889/ijmems.2024.9.3.026

Nibedita Swain, Papia Ray, Majed A. Alotaibi, Hasmat Malik, Fausto Pedro García Márquez, Asyraf Afthanorhan

{"title":"A Novel Approach for Implementing and Optimizing Proportional-Resonant Controller and L-C-L Filter for Single-Phase Grid-tie Inverter","authors":"Nibedita Swain, Papia Ray, Majed A. Alotaibi, Hasmat Malik, Fausto Pedro García Márquez, Asyraf Afthanorhan","doi":"10.33889/ijmems.2024.9.3.026","DOIUrl":"https://doi.org/10.33889/ijmems.2024.9.3.026","url":null,"abstract":"This article introduces the design procedure of a 1-phase full-bridge inverter for grid-connected applications. The main idea of modelling a full-bridge inverter is that it plays a vital role in solar energy systems. The dynamic equations are formed with the state-space averaging (SSA) technique. A Small-signal averaged model of a full-bridge inverter is constructed by assuming grid current and capacitor voltage as the two states. The voltage and current controller scheme are based on the frequency domain approach. The voltage controller is designed to maintain fixed voltage, and the current controller is used for controlling grid current. The LCL filter is connected to the inverter to provide better harmonic elimination and filter size minimization. This filter is formed by parallel-series combination of inductance and capacitance to improve the overall system performance. Here, a passive damping method is incorporated to make a balanced steady system. Finally, a proportional integral and proportional resonant (PI-PR) controller is introduced to provide better stability and tracking. The detailed analysis of PR controller is explored and demonstrated by MATLAB simulation.","PeriodicalId":517298,"journal":{"name":"International Journal of Mathematical, Engineering and Management Sciences","volume":"36 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141233167","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 Spatial Error Model in Structural Equation for the Human Development Index Modeling 人类发展指数建模结构方程中的空间误差模型

International Journal of Mathematical, Engineering and Management Sciences Pub Date : 2024-06-01 DOI: 10.33889/ijmems.2024.9.3.028

Anik Anekawati, Purhadi, Mohammad Rofik, Syaifurrahman Hidayat

{"title":"A Spatial Error Model in Structural Equation for the Human Development Index Modeling","authors":"Anik Anekawati, Purhadi, Mohammad Rofik, Syaifurrahman Hidayat","doi":"10.33889/ijmems.2024.9.3.028","DOIUrl":"https://doi.org/10.33889/ijmems.2024.9.3.028","url":null,"abstract":"Spatial regression, particularly the Spatial Error Model (SERM), was utilized in prior studies to analyze Human Development Index (HDI) modeling. However, the studies were unable to determine which dimension among the three defined by the UN and BPS had the significant impact on HDI, as they constructed models based on the indicators used for the interpretation of the dimensions. Therefore, a comprehensive analysis combining spatial regression and Structural Equation Modeling (SEM), known as spatial SEM, was deemed necessary. This is the reason the current study aimed to develop SERM-SEM modeling holistically. The model parameters were estimated using the Generalized Method of Moments (GMM). To assess spatial dependency, the Lagrange Multiplier (LM) method was employed, with a distinct model error distribution compared to the error distribution of the traditional spatial model. The result of the LM test development showed that, under the null hypothesis, the LM test statistics followed a distribution. The results of the SERM-SEM model development were applied to HDI modeling using data in 2022 with three latent variables, namely a Long and Healthy Life (LHL), Knowledge (Know_L), and a Decent Standard of Living (DLS) (based on UN standards). The assessment of the outer model in SEM was based on the loading factor values that exceed 0.5 and their significance. This evaluation aimed to identify indicators that effectively explained or measured latent variables, so it got the revised model in SEM. These indicators are LHL2 and LHL 4 to form LHL. DLS1 and DLS3 are indicators to make up DLS, and for Know_L, they are K2 and K3. The revised SEM model was analyzed using spatial. The results of the spatial dependency test showed that the HDI model significantly led to the SERM-SEM model. Knowledge and a decent standard of living variables significantly influence HDI.","PeriodicalId":517298,"journal":{"name":"International Journal of Mathematical, Engineering and Management Sciences","volume":"78 13","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141231128","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

Study of Code Smells: A Review and Research Agenda 代码气味研究：回顾与研究议程

International Journal of Mathematical, Engineering and Management Sciences Pub Date : 2024-06-01 DOI: 10.33889/ijmems.2024.9.3.025

Stuti Tandon, Vijay Kumar, V. B. Singh

引用次数: 0

Reliability Equivalence Factors for Coherent System using Survival Signature 使用生存特征的相干系统可靠性等效系数

International Journal of Mathematical, Engineering and Management Sciences Pub Date : 2024-06-01 DOI: 10.33889/ijmems.2024.9.3.034

Deepak, Garima Chopra, Deeksha

{"title":"Reliability Equivalence Factors for Coherent System using Survival Signature","authors":"Deepak, Garima Chopra, Deeksha","doi":"10.33889/ijmems.2024.9.3.034","DOIUrl":"https://doi.org/10.33889/ijmems.2024.9.3.034","url":null,"abstract":"This study presents a methodology aimed at enhancing the performance of coherent systems through the application of survival signature analysis, focusing on the calculation of reliability equivalence factors (REFs). In the context of system improvement, the selection of reliability improvement strategies, such as reduction and duplication, depends on various factors like space limitations, costs, and other constraints. The importance of REF lies in their ability to quantify the extent of reliability improvement, providing a clear metric for decision-makers to assess the cost-effectiveness of various enhancement strategies. The analysis focuses on two distinct types of REFs, namely, mean reliability equivalence factors (MREFs) and survival reliability equivalence factors (SREFs), targeted at reliability enhancement via strategies including component failure rate reduction and the implementation of warm standby duplication. Both perfect and imperfect switching scenarios in warm duplication are examined, with survival signature analysis applied to determine the system's survival function and mean time to failure (MTTF). The methodology's effectiveness is illustrated through a case study of a six-unit bridge system, where the components are modeled using exponential and Weibull distributions. REFs are evaluated for sequential upgrades in either individual components or entire component types. The study also conducts a comparative analysis between the reliability and MTTF of the original and improved systems across different improvement techniques.","PeriodicalId":517298,"journal":{"name":"International Journal of Mathematical, Engineering and Management Sciences","volume":"20 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141229606","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

Quartic B-Spline Method for Non-Linear Second Order Singularly Perturbed Delay Differential Equations 非线性二阶奇异扰动延迟微分方程的四元 B-样条法

International Journal of Mathematical, Engineering and Management Sciences Pub Date : 2024-06-01 DOI: 10.33889/ijmems.2024.9.3.035

Shilpa Malge, R. Lodhi

{"title":"Quartic B-Spline Method for Non-Linear Second Order Singularly Perturbed Delay Differential Equations","authors":"Shilpa Malge, R. Lodhi","doi":"10.33889/ijmems.2024.9.3.035","DOIUrl":"https://doi.org/10.33889/ijmems.2024.9.3.035","url":null,"abstract":"This paper introduces a novel computational approach utilizing the quartic B-spline method on a uniform mesh for the numerical solution of non-linear singularly perturbed delay differential equations (NSP-DDE) of second-order with a small negative shift. These types of equations are encountered in various scientific and engineering disciplines, including biology, physics, and control theory. We are using quartic B-spline methods to solve NSP-DDE without linearizing the equation. Thus, the set of equations generated by the quartic B-spline technique is non-linear and the obtained equations are solved by Newton-Raphson method. The success of the approach is assessed by applying it to a numerical example for different values of perturbation and delay parameter parameters, the maximum absolute error (MAE) is obtained via the double mesh principle. The convergence rate of the proposed method is four. Obtained numerical results are compared with existing numerical techniques in literature and observe that the proposed method is superior with other numerical techniques. The quartic B-spline method provides the numerical solution at any point of the given interval. It is easy to implement on a computer and more efficient for handling second-order NSP-DDE.","PeriodicalId":517298,"journal":{"name":"International Journal of Mathematical, Engineering and Management Sciences","volume":"49 51","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141232222","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