Operations Research and Decisions最新文献_第8页

Improving logic-based Benders’ algorithms for solving min-max regret problems 改进基于逻辑的Benders算法来解决最小最大后悔问题

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Operations Research and Decisions Pub Date : 2021-01-01 DOI: 10.37190/ord210202

Lucas Assunção, A. C. Santos, T. Noronha, R. Andrade

{"title":"Improving logic-based Benders’ algorithms for solving min-max regret problems","authors":"Lucas Assunção, A. C. Santos, T. Noronha, R. Andrade","doi":"10.37190/ord210202","DOIUrl":"https://doi.org/10.37190/ord210202","url":null,"abstract":"This paper addresses a class of problems under interval data uncertainty, composed of min-max regret generalisations of classical 0-1 optimisation problems with interval costs. These problems are called robust-hard when their classical counterparts are already NP-hard. The state-of-the-art exact algorithms for interval 0-1 min-max regret problems in general work by solving a corresponding mixed integer linear programming formulation in a Benders’ decomposition fashion. Each of the possibly exponentially many Benders’ cuts is separated on the fly through the resolution of an instance of the classical 0-1 optimisation problem counterpart. Since these separation subproblems may be NP-hard, not all of them can be easily modelled by means of Linear Programming (LP), unless P = NP. In this work, we formally describe these algorithms through a logic-based Benders’ decomposition framework and assess the impact of three warm-start procedures. These procedures work by providing promising initial cuts and primal bounds through the resolution of a linearly relaxed model and an LP-based heuristic. Extensive computational experiments in solving two challenging robust-hard problems indicate that these procedures can highly improve the quality of the bounds obtained by the Benders’ framework within a limited execution time. Moreover, the simplicity and effectiveness of these speed-up procedures makes them an easily reproducible option when dealing with interval 0-1 min-max regret problems in general, especially the more challenging subclass of robust-hard problems","PeriodicalId":43244,"journal":{"name":"Operations Research and Decisions","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86866044","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

Measurement of Control Power in Corporate Networks 企业网络中控制权的测量

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Operations Research and Decisions Pub Date : 2021-01-01 DOI: 10.37190/ORD210106

Izabella Stach, J. Mercik

{"title":"Measurement of Control Power in Corporate Networks","authors":"Izabella Stach, J. Mercik","doi":"10.37190/ORD210106","DOIUrl":"https://doi.org/10.37190/ORD210106","url":null,"abstract":"This paper discusses some game-theoretical methods for measuring indirect control in complex corporate shareholding networks. The methods use power indices in order to estimate the direct and indirect control in shareholding structures. Some of these methods only estimate the control power of investors (firms without shareholdings), and only a few measure the control power of all firms involved in shareholding networks (which means investors and stock companies). None of them take measuring the importance of mutual connections (edges in the networks) into consideration; thus we focus in particular on an extension of these methods in this paper in order to measure both the control-power of the firms involved in complex shareholding structures (represented by nodes in networks), and the importance (power) of linkages between the firms as elements of a whole corporate shareholding network. More precisely, we apply our approaches to a theoretical example of a corporate network. Moreover, we continue the considerations started in Mercik and Stach (Transactions on Computational Collective Intelligence XXXI, LNCS 11290: 64–79, 2018) about reasonable properties for indirect control measurement. Some ideas of new properties are proposed. The paper also provides a brief review of the literature concerning the topic.","PeriodicalId":43244,"journal":{"name":"Operations Research and Decisions","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85787435","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

DEA-based competition strategy in the presence of undesirable products: An application to paper mills 存在不良产品时基于dea的竞争策略:在造纸厂中的应用

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Operations Research and Decisions Pub Date : 2021-01-01 DOI: 10.37190/ord210201

A. Amirteimoori, S. Masrouri

引用次数: 0

A panel data estimation of the determinants of life expectancy in selected SAARC countries 对选定南盟国家预期寿命决定因素的面板数据估计

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Operations Research and Decisions Pub Date : 2021-01-01 DOI: 10.37190/ord210404

Nusrat Jafrin, M. M. Masud, A. Saif, M. Mahi, Moriam Khanam

{"title":"A panel data estimation of the determinants of life expectancy in selected SAARC countries","authors":"Nusrat Jafrin, M. M. Masud, A. Saif, M. Mahi, Moriam Khanam","doi":"10.37190/ord210404","DOIUrl":"https://doi.org/10.37190/ord210404","url":null,"abstract":"The precarious and decisive dynamics concerning the health of the population of South Asian Association for Regional Cooperation (SAARC) countries has called for further inquiry into the determinants of Life Expectancy (LE) in this region. Hence, the current paper employs panel data estimation methods to analyse the economic, social, demographic, environmental, and technological factors influencing LE in five SAARC countries. These countries (Bangladesh, India, Pakistan, Nepal, and Sri Lanka) are selected as they are favoured by the country similarity theory and other identical contexts, and because their data are obtained from the World Bank and UNDP databases from 2000 to 2016. The results reveal that the mean year of schooling and sanitation services are significant positive predictors of Life Expectancy at Birth (LEAB). However, the total fertility rate, urban population, and CO2 emissions negatively influence life expectancy. Furthermore, the impact of health expenditure on life expectancy is significant but negative, which is unconventional. On the other hand, other independent variables, such as GDP, gross capital formation, internet usage, and mobile cellular subscription turn out to be insignificant predictors of LEAB. Our aggregate findings reveal some common factors on which the governments of SAARC countries can collaborate to improve the LEAB of the region while identifying some idiosyncratic factors that require tailored attention of the governments and policymakers of the respective nations","PeriodicalId":43244,"journal":{"name":"Operations Research and Decisions","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81726678","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: 3

Stochastic programming model for production planning with stochastic aggregate demand and spreadsheet-based solution heuristics 随机总需求生产计划的随机规划模型及基于电子表格的求解启发式方法

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Operations Research and Decisions Pub Date : 2021-01-01 DOI: 10.37190/ord210406

Nasreddine Saadouli

引用次数: 0

Identification of risks of investments into residential premises for rent in Poland 识别波兰住宅租赁投资的风险

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Operations Research and Decisions Pub Date : 2020-08-26 DOI: 10.37190/ord210403

A. Górski, Kamila Urbańska, A. Parkitna

引用次数: 0

Assessment of mixed network processes with shared inputs and undesirable factors 具有共享输入和不良因素的混合网络过程的评估

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Operations Research and Decisions Pub Date : 2020-01-01 DOI: 10.37190/ord200106

Maryam Nematizadeh, A. Amirteimoori, S. Kordrostami, M. Vaez-Ghasemi

引用次数: 3

Impatient customers in Markovian queue with Bernoulli feedback and waiting server under variant working vacation policy 不同休假政策下具有伯努利反馈的马尔可夫排队和等待服务的不耐烦顾客

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Operations Research and Decisions Pub Date : 2020-01-01 DOI: 10.37190/ORD200401

A. Bouchentouf, Lahcene Yahiaoui, M. Kadi, Shakir Majid

引用次数: 2

Assessment of strategic decisions of enterprises operating in international marketing in the era of modern technologies 现代技术时代国际营销企业战略决策评估

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Operations Research and Decisions Pub Date : 2020-01-01 DOI: 10.37190/ord200304

Małgorzata Łęgowik-Małolepsza

{"title":"Assessment of strategic decisions of enterprises operating in international marketing in the era of modern technologies","authors":"Małgorzata Łęgowik-Małolepsza","doi":"10.37190/ord200304","DOIUrl":"https://doi.org/10.37190/ord200304","url":null,"abstract":"In the paper, the issue of assessment of strategic decisions in the company is approached, while indicating their impact on the implementation of modern technological solutions and the methods for their financing. The study is divided into two basic parts, namely theoretical and empirical. In the theoretical part, the essence of the strategy of the company is depicted, taking into account the impact of strategic decisions on the changes in the adopted strategy of the enterprise based on the literature studies. The considerations presented in the empirical part include the results of the research conducted in the multinational chemical company. The objective of the study is to learn and assess the relationships between the implementation of modern technological solutions and the effectiveness of strategic decisions on the methods for their financing. The research methods applied to accomplish the objective are literature studies, a case study and the following techniques related to analysis are used: the analysis of return on investment, and the analysis of financial leverage effect. The issue of assessment of strategic decisions is important and up-to-date due to its impact on the continuity of business operations and maintaining a competitive advantage on the market. This study is an attempt to fill the observed research gap regarding the relationships between the implementation of modern technological solutions and the effectiveness of strategic decisions on the methods for their financing.","PeriodicalId":43244,"journal":{"name":"Operations Research and Decisions","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84094512","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

From expected utility theory to prospect theory: tracking down the experimental path after forty years 从期望效用理论到前景理论:四十年后的实验路径追寻

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Operations Research and Decisions Pub Date : 2020-01-01 DOI: 10.37190/ORD200403

S. Kalinowski

引用次数: 0