Yugoslav Journal of Operations Research最新文献_第4页

Does ownership structure affect bank performance in the COVID-19 pandemic period? Evidence from Croatia 在COVID-19大流行期间，股权结构是否影响银行绩效?来自克罗地亚的证据

Yugoslav Journal of Operations Research Pub Date : 2022-01-01 DOI: 10.2298/yjor220615018f

Katerina Fotova-Cikovic, Damira Keček, J. Lozić

{"title":"Does ownership structure affect bank performance in the COVID-19 pandemic period? Evidence from Croatia","authors":"Katerina Fotova-Cikovic, Damira Keček, J. Lozić","doi":"10.2298/yjor220615018f","DOIUrl":"https://doi.org/10.2298/yjor220615018f","url":null,"abstract":"This paper investigates the relationship between bank ownership and efficiency before and after the COVID-19 pandemic in a sample of 20 Croatian commercial banks in the period from 2015 to 2020. The interconnection between these variables is examined with the use of a dynamic data envelopment analysis (window DEA) framework. Other goals are to measure the relative efficiency of Croatian banks in the observed period as well as the evolvement of the banking sector as a whole. The findings reveal that domestic banks outperform by little foreign-owned Croatian banks during the COVID-19 crisis year 2020, but, moreover, domestic and small-sized banks have experienced the least negative impact of COVID-19 in 2020. The results regarding the impact of bank size on bank efficiency are inconsistent and require additional study. The used methodology and the findings of this empirical research could be of interest to academic members, bank management and policymakers. The latter should be especially interested in the results and the resilience of domestic and foreign banks to external shocks, in order to re-examine their current bank policies and the national attitude towards attracting foreign capital in the banking sector.","PeriodicalId":52438,"journal":{"name":"Yugoslav Journal of Operations Research","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87597779","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

Polyhedral complementarity problem with quasimonotone decreasing mappings 拟单调递减映射的多面体互补问题

Yugoslav Journal of Operations Research Pub Date : 2022-01-01 DOI: 10.2298/yjor2111016031s

V. Shmyrev

引用次数: 0

The inverse k-max combinatorial optimization problem 逆k-max组合优化问题

Yugoslav Journal of Operations Research Pub Date : 2022-01-01 DOI: 10.2298/yjor220516037n

T. Nhan, K. Nguyen, Nguyen Hung, N. Toan

引用次数: 0

Metaheuristic approaches for the green vehicle routing problem 绿色车辆路径问题的元启发式方法

Yugoslav Journal of Operations Research Pub Date : 2022-01-01 DOI: 10.2298/yjor211120016m

Luka Matijević

引用次数: 1

Fuzzy optimization model of two parameter Weibull deteriorating rate with quadratic demand and variable holding cost under allowable shortages 允许短缺条件下二次需求和可变持有成本双参数威布尔劣化率模糊优化模型

Yugoslav Journal of Operations Research Pub Date : 2022-01-01 DOI: 10.2298/yjor220115021p

Preety Poswal, A. Chauhan, Y. Rajoria, R. Boadh, Abhinav Goel

{"title":"Fuzzy optimization model of two parameter Weibull deteriorating rate with quadratic demand and variable holding cost under allowable shortages","authors":"Preety Poswal, A. Chauhan, Y. Rajoria, R. Boadh, Abhinav Goel","doi":"10.2298/yjor220115021p","DOIUrl":"https://doi.org/10.2298/yjor220115021p","url":null,"abstract":"In this paper, a fuzzy inventory model with a Weibull deterioration rate, a quadratic demand rate, and a variable holding cost under permissible shortages has been developed. The deterioration rate is expressed by a two-parameter Weibull distribution. During a shortage, some buyers wait for the actual product, while others do not. This shortfall is considered partially backlogged in this model. Some buyers wait for the actual product during such shortages, but many do not. Therefore, partially backlogged shortages are taken into account in this approach. In a traditional inventory model, all parameters such as purchasing cost, shortage cost, holding cost, etc. are predetermined. However, there will be some variations. As a result, fuzzy factors are more accurate to deal with the real world?s problems. This research attempts to cut down the cost in a fuzzy environment by using quadratic demand, shortage, Weibull deterioration rate, and variable holding cost. Costs such as ordering, shortage, and deterioration are addressed as pentagonal fuzzy numbers that are defuzzified using a graded mean representation approach. Finally, sensitivity analysis was carried out to investigate the influence of cost parameters on total inventory cost. A numerical example is used to validate the proposed model in a real-world system.","PeriodicalId":52438,"journal":{"name":"Yugoslav Journal of Operations Research","volume":"186 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86497791","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

Saddle point criteria for semidefinite semi-infinite convex multiobjective optimization problems 半定半无限凸多目标优化问题的鞍点准则

Yugoslav Journal of Operations Research Pub Date : 2022-01-01 DOI: 10.2298/yjor201223001l

Vivek Laha, Rahul Kumar, J. Maurya

引用次数: 0

Estimating the potential willingness of the state to use military force based on the Sugeno fuzzy integral 基于Sugeno模糊积分估算国家使用武力的潜在意愿

Yugoslav Journal of Operations Research Pub Date : 2022-01-01 DOI: 10.2298/yjor210515002s

S. Sveshnikov, V. Bocharnikov, Anatoly Pavlikovsky, Andrey Prima

{"title":"Estimating the potential willingness of the state to use military force based on the Sugeno fuzzy integral","authors":"S. Sveshnikov, V. Bocharnikov, Anatoly Pavlikovsky, Andrey Prima","doi":"10.2298/yjor210515002s","DOIUrl":"https://doi.org/10.2298/yjor210515002s","url":null,"abstract":"Estimation of the potential willingness of the state to use military force is an integral part of the analysis of international relations and the preparation of key decisions in security sphere. Our problem was to develop a method for numerically estimating the potential willingness of any state to use military force. This method should take into account a large number of quantitative and qualitative criteria, the uncertainty of their relationships, as well as the uncertainty of the initial data, some of which can only be obtained with the help of experts. Our analysis has shown that the known methods have a number of serious shortcomings. We proposed to solve this problem based on the representation of partial estimations of states in the form of fuzzy sets, and the importance of criteria in the form of a fuzzy measure. We also proposed to aggregate the partial estimations using the Sugeno fuzzy integral. We developed a hierarchical structure of estimation criteria, determined the importance of the criteria, built an observation channel based on the Harrington curve to obtain input estimations, and also developed an aggregation algorithm. As a result, we calculated estimations for 137 states and examined their potential willingness to use military force. The results disclose new aspects of using fuzzy-integral calculus to construct hierarchical models of multi-criteria estimating, and also demonstrate the possibility of using artificial intelligence methods to obtain numerical estimations in the sphere of international relations.","PeriodicalId":52438,"journal":{"name":"Yugoslav Journal of Operations Research","volume":"89 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91115340","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

A maximum flow network interdiction model in fuzzy stochastic hybrid uncertainty environments 模糊随机混合不确定性环境下的最大流量网络拦截模型

Yugoslav Journal of Operations Research Pub Date : 2022-01-01 DOI: 10.2298/yjor220415038b

S. Bavandi, H. Bigdeli

引用次数: 2

Mathematical model for analysing availability of threshing combine machine under reduced capacity 减容条件下脱粒联合机可用性分析的数学模型

Yugoslav Journal of Operations Research Pub Date : 2022-01-01 DOI: 10.2298/yjor220315019s

Shakuntla Singla, U. Modibbo, M. Mijinyawa, Subhash Malik, Shubham Verma, Pooja Khurana

{"title":"Mathematical model for analysing availability of threshing combine machine under reduced capacity","authors":"Shakuntla Singla, U. Modibbo, M. Mijinyawa, Subhash Malik, Shubham Verma, Pooja Khurana","doi":"10.2298/yjor220315019s","DOIUrl":"https://doi.org/10.2298/yjor220315019s","url":null,"abstract":"Obtaining system availability in an engineering design is trickish and challenging, especially when there is a reduction in capacity; however, it supports system maintainability. In this paper, a mathematical model for finding the availability under the reduced capacity has been proposed using the Chapman Kolmogorov approach with the help of transition diagrams associated with various possible combinations of probabilities. The paper observes the most critical subsystem by selecting variable failure and repair rates from different subsystems. It deals with the sensitivity analysis of a complex repairable threshing combined machine comprising subsystems in a series configuration and the threshing machine consisting of 21 subsystems. The device works in total capacity when the threshing drum and feeding Hooper work in the complete state, and the concave subsystem and blower work with reduced power. This study dealt with uncertain data and was analyzed analytically using a complex repairable system. The availability of the entire machine has been investigated analytically, and various availability indices such as subsystems extruder have been computed and reported. The study discovered that subsystem extruder has the most impact on some subsystems? overall system availability.","PeriodicalId":52438,"journal":{"name":"Yugoslav Journal of Operations Research","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":"74877069","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: 13

Modified converse duality for multiobjective higher order Wolfe type dual program with cone constraints 锥约束下多目标高阶Wolfe型对偶规划的修正逆对偶性

Yugoslav Journal of Operations Research Pub Date : 2022-01-01 DOI: 10.2298/yjor210915014s

Sonali Sethi, N. Kailey, Shivani Saini

引用次数: 0