Yugoslav Journal of Operations Research最新文献

Multi-server Markovian heterogeneous arrivals queue with two kinds of working vacations and impatient customers 多服务器马尔可夫异构到达队列，具有两种类型的工作假期和不耐烦的客户

Yugoslav Journal of Operations Research Pub Date : 2023-01-01 DOI: 10.2298/yjor221117011y

R.S. Yohapriyadharsini, V. Suvitha

引用次数: 0

Cat swarm optimization for the determination of strata boundaries 求解地层边界的Cat群算法

Yugoslav Journal of Operations Research Pub Date : 2023-01-01 DOI: 10.2298/yjor221015003j

Raghad M. Jasim

引用次数: 0

The exact defuzzification method under polynomial approximation of various fuzzy sets 各种模糊集的多项式逼近下的精确去模糊化方法

Yugoslav Journal of Operations Research Pub Date : 2023-01-01 DOI: 10.2298/yjor2306017d

S. De, Somnath Nandi

{"title":"The exact defuzzification method under polynomial approximation of various fuzzy sets","authors":"S. De, Somnath Nandi","doi":"10.2298/yjor2306017d","DOIUrl":"https://doi.org/10.2298/yjor2306017d","url":null,"abstract":"This article deals with the new approach of finding the defuzzification / ranking index of various types of fuzzy sets. Traditionally, in most of the articles on fuzzy decision making the defuzzification methods are not justified with respect to that of highest aspiration levels. This study highlights an efficient defuzzification (ranking) method which links between the gaps on the defuzzified values obtained using ?-cuts and without ?-cuts of fuzzy numbers. Moreover, for a given problem different membership grades are found by different researchers which are confusing and contradicts the conceptual uniqueness of fuzzy set itself. To resolve these issues, first of all, we have studied a polygonal fuzzy set by means of an interpolating polynomial function. However, in fuzzy set theory we usually seek the highest membership grade for ranking any kind of decision-making problem therefore, maximizing the polynomial function, we get the index value of the proposed fuzzy set. An artificial intelligence (AI) based solution algorithm has also been developed to find the exact defuzzified value. Indeed, considering two numerical examples we have compared these ranking values with some of the existing state of- arts under higher aspiration levels. Finally, some graphical illustrations have also been done to justify the proposed approach.","PeriodicalId":52438,"journal":{"name":"Yugoslav Journal of Operations Research","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89145718","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 new analytical approximate solution of fractional coupled Korteweg-de Vries system 分数阶耦合Korteweg-de Vries系统的一个新的解析近似解

Yugoslav Journal of Operations Research Pub Date : 2023-01-01 DOI: 10.2298/yjor221215013a

H. Ali, A. Noreldeen, Ali Ali

{"title":"A new analytical approximate solution of fractional coupled Korteweg-de Vries system","authors":"H. Ali, A. Noreldeen, Ali Ali","doi":"10.2298/yjor221215013a","DOIUrl":"https://doi.org/10.2298/yjor221215013a","url":null,"abstract":"The main objective of this work is to present a modification of the Mittag- Leffler function to deduce a relatively new analytical approximate method (for short MMLFM) able to solve time-fractional nonlinear partial differential equations (PDEs). Moreover, we employ the MMLFM to solve the time-fractional coupled Korteweg-de Vries (KdV) model described by two nonlinear fractional partial differential equations (FPDEs) based upon Caputo fractional derivative (CFD). The simulation of projected results is presented in some figures and tables. Furthermore, we compare our solutions when ? = 1 with known exact solutions which indicate a good agreement, in addition, we compare our outcomes with the results obtained by other methods in the literature such as the Natural decomposing method (NDM) and homotopy decomposition method (HDM) in order to prove the reliability and efficiency of our used method. Also, we display solutions with different values of ? to present the effect of the fractional order on the proposed problem. The results of this article reveal the advantages of the MMLFM, which is simple, reliable, accurate, needs simple mathematical computations, is rapidly convergent to the exact solution, have a straightforward and easy algorithm compared to other analytical methods to study linear and nonlinear FPDEs, which makes this technique suited for real industrial or medical applications.","PeriodicalId":52438,"journal":{"name":"Yugoslav Journal of Operations Research","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80291854","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 literature review on retrial queueing system with Bernoulli vacation 具有伯努利休假的重审排队系统的文献综述

Yugoslav Journal of Operations Research Pub Date : 2023-01-01 DOI: 10.2298/yjor230415020m

Mathavavisakan Micheal, Kandaiyan Indhira

{"title":"A literature review on retrial queueing system with Bernoulli vacation","authors":"Mathavavisakan Micheal, Kandaiyan Indhira","doi":"10.2298/yjor230415020m","DOIUrl":"https://doi.org/10.2298/yjor230415020m","url":null,"abstract":"The retrial phenomenon occurs inherently in a wide range of queueing systems. The majority of retrial queueing models do not account for vacation. However, in practice, retrial queueing systems undergo vacations for maintenance or other reasons. In this study, we provide an in-depth analysis of the many possible retrial queueing systems when Bernoulli vacations are in effect. Moreover, this study outlines the key principles and reviews the relevant literature. The framework of a retrial queue with Bernoulli vacation has numerous applications in computer networking systems, manufacturing and production mechanisms, inventory systems, including network service, mail service and file transfer service, etc. Several retrial queueing systems have been investigated, notably M/M/1, M/M/C, M/G/1, M[X]/G/1, and Geo/G/1. Many other important situations, such as server interruption, feedback, G-queue, impatient customers, priority customers, etc., have been explored in relation to retrial queues with Bernoulli vacation and the results of these investigations are also highlighted. The foremost objective of this study is to help researchers, administrators and technical workers who want to use queuing theory to simulate congestion and need to know where to find details on the right models. Finally, some open problems and potential future lines of survey are also covered.","PeriodicalId":52438,"journal":{"name":"Yugoslav Journal of Operations Research","volume":"213 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79484740","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 promising approach for decision modeling with single-valued neutrosophic probabilistic hesitant fuzzy Dombi operators 一种有前途的单值嗜中性概率犹豫模糊Dombi算子决策建模方法

Yugoslav Journal of Operations Research Pub Date : 2023-01-01 DOI: 10.2298/yjor230115007s

Muhammad Kamran, Shahzaib Ashraf, Muhammad Naeem

{"title":"A promising approach for decision modeling with single-valued neutrosophic probabilistic hesitant fuzzy Dombi operators","authors":"Muhammad Kamran, Shahzaib Ashraf, Muhammad Naeem","doi":"10.2298/yjor230115007s","DOIUrl":"https://doi.org/10.2298/yjor230115007s","url":null,"abstract":"A combination of the single-valued neutrosophic set (SV-NS) and the probabilistic hesitant fuzzy set is the single-valued neutrosophic probabilistic hesitant fuzzy (SV-NPHF) environment (PHFS). It is intended for some unsatisfactory, ambiguous, and contradictory circumstances in which each element has a number of various values that are brought about by the situation?s actuality. The decision-maker can quickly gather and analyze the facts by employing a strategic decision-making technique. On the other hand, uncertainty will be a big part of our daily lives when we are learning. We present a decision-making strategy for the SV-NPHF context to address this data ambiguity. The fundamental operational concepts for SV-NPHF information under Dombi aggregation operators were initially developed on the basis of this study. The SV-NPHF Dombi weighted arithmetic average (SV-NPHFDWAA) operator and SV-NPHF Dombi weighted arithmetic geometric (SV-NPHFDWAG) operators are two SV-NPHF Dombi aggregation Operators that are then examined. Following that, we look into further characterizations of the proposed operators, including idempotency, boundedness, and monotonicity. Forthe derived operators, we additionally developed the score and accuracy functions. When using SV-NPHF data in a multi attribute decision support system (MADSS), it is necessary to compare the effectiveness of various (AOs) in order to make the best decision. In addition, it is demonstrated how to use symmetry analysis to choose the optimal social media platform for earning and learning in a practical application of SV-NPHFDWAA and SV-NPHFDWAG.","PeriodicalId":52438,"journal":{"name":"Yugoslav Journal of Operations Research","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83224024","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

Decision making model for detecting infected people with COVID-19 COVID-19感染者检测决策模型

Yugoslav Journal of Operations Research Pub Date : 2023-01-01 DOI: 10.2298/yjor221115009m

S. Mahmood

引用次数: 0

Team-bounded DEA efficiency scores: The case of UEFA Champions League Players 球队边界DEA效率得分:欧冠球员的案例

Yugoslav Journal of Operations Research Pub Date : 2023-01-01 DOI: 10.2298/yjor230615022i

Luka Ivanovic, S. Radovanović, G. Savić, Boris Delibasic, Milena Popovic

{"title":"Team-bounded DEA efficiency scores: The case of UEFA Champions League Players","authors":"Luka Ivanovic, S. Radovanović, G. Savić, Boris Delibasic, Milena Popovic","doi":"10.2298/yjor230615022i","DOIUrl":"https://doi.org/10.2298/yjor230615022i","url":null,"abstract":"Each player puts in time and effort to achieve results during a game, which can contribute to the team?s overall score. However, the combined effort of the whole team is a hidden factor that impacts a player?s outcomes. With this in mind, the aim of this study is to improve the DEA methodology by considering team performance when calculating efficiency scores. In this study, we introduce a new way to estimate efficiency using data envelopment analysis, which takes into account how the team performs. To achieve this, we use a single mathematical model that limits the player?s efficiency score based on the team performance. This ensures that the efficiency score cannot be more than ? times the average team efficiency score. The results from applying this new model to the UEFA Champions League 2021/22 season indicate that inefficient teammates significantly impact efficiency scores. However, when the entire team performs well, any decrease in efficiency scores is not substantial. The key advantage of these new efficiency scores is that they help pinpoint weak links within each team and identify areas that need improvement to enhance individual efficiency. Consequently, coaches and managers can utilize this model to identify areas for team enhancement, as well as players to improve their performance.","PeriodicalId":52438,"journal":{"name":"Yugoslav Journal of Operations Research","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76849549","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

Entrepreneurs’ preferences towards online market research packages: A discrete choice analysis 企业家对网络市场调研包的偏好:一个离散选择分析

Yugoslav Journal of Operations Research Pub Date : 2023-01-01 DOI: 10.2298/yjor230815026n

Ognjen Nikolic

{"title":"Entrepreneurs’ preferences towards online market research packages: A discrete choice analysis","authors":"Ognjen Nikolic","doi":"10.2298/yjor230815026n","DOIUrl":"https://doi.org/10.2298/yjor230815026n","url":null,"abstract":"Startups have become a buzzword in the last couple of years, and entrepreneurship became career path for a number of people in the world. With all the advances in education and government subsidizing all over the world, still, statistics shows only a small percentage of successful startups. Studies have shown that the one the leading reasons for startup failure is the misreading of market?s needs. The aim of this paper is to determine the approach to market research, knowledge of tools and methods, and preferences towards online market research tools of entrepreneurs by using Discrete Choice Analysis. The research gathered 187 valid responses from a panel of participants working on developing new products and business, using an online survey tool. In the paper it is shown that the most important attributes for entrepreneurs are the price of the market research tool, followed by the level of details in the report generated, with more in-depth analysis regarding segmentation, simulations, and Marginal Willingness to Pay in the further chapters. The results of the research imply the need for a market research business model optimized for those starting a new business, focused primarily on detailed reporting and analysis, with the pricing model adjusted to the lack of resources entrepreneurs face at the start of their ventures, which would help them better understand the market-fit at the beginning and raise the statistic of successful startups.","PeriodicalId":52438,"journal":{"name":"Yugoslav Journal of Operations Research","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135449560","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

Metric on the space of systems behavior functions represented by fuzzy measures 用模糊测度表示的系统行为函数空间上的度量

Yugoslav Journal of Operations Research Pub Date : 2023-01-01 DOI: 10.2298/yjor230315012b

V. Bocharnikov, S. Sveshnikov

{"title":"Metric on the space of systems behavior functions represented by fuzzy measures","authors":"V. Bocharnikov, S. Sveshnikov","doi":"10.2298/yjor230315012b","DOIUrl":"https://doi.org/10.2298/yjor230315012b","url":null,"abstract":"G. Klir proposed to describe the behavior of complex systems using behavior functions (BFs) - invariant constraints on the set of system states. BFs are one of the most productive tools for studying the functioning of systems. To study systems, it is necessary to have a metric for measuring of the difference between two BFs. To describe BFs modern researchers do not use distributions other than probability or possibility. But these distributions can be considered as special cases of Sugeno fuzzy measures, the use of which greatly expands the possibilities in the study of systems. However, metrics to measure the difference between fuzzy measures have not been developed. Therefore, in this article, the authors proposed a new metric and an algorithm for its calculation for the case when BFs are described by Sugeno fuzzy measures. This metric is based on the Cartesian product of fuzzy measures and the use of our proposed concentration function. The metric makes it possible to compare the behavior of systems in the case of describing BFs by Sugeno fuzzy measures with different modalities, as well as to ensure the priority of taking into account the set of the most significant states of the system.","PeriodicalId":52438,"journal":{"name":"Yugoslav Journal of Operations Research","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75289519","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