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Changes in the relative situation of district hospitals in Poland after the introduction of a system of basic hospital service provision in 2017 2017年引入基本医院服务体系后波兰地区医院相对状况的变化
IF 0.4
Operations Research and Decisions Pub Date : 2022-01-01 DOI: 10.37190/ord220308
A. Sielska
{"title":"Changes in the relative situation of district hospitals in Poland after the introduction of a system of basic hospital service provision in 2017","authors":"A. Sielska","doi":"10.37190/ord220308","DOIUrl":"https://doi.org/10.37190/ord220308","url":null,"abstract":"The most recent big reform of the Polish health system took place in 2017 and introduced a basic hospital service provision system. Hospitals were able to be included in the network and receive flat-rate financing from the National Health Fund. The current paper aims to assess how the relative situation of hospitals changed between 2015 and 2018. This study is based on multicriteria rankings which take into account the values of profit/loss on sales, the contract with the NHF, the income from health services outside the NHF, the income from rental and lease, the employment of doctors, the employment of nurses, liabilities, operating costs, and interns and residents per hospital bed. The similarity of rankings constructed using different methods is shown. Based on the results of the Chi-squared test, it can be concluded that the inclusion in the network does not affect whether the relative situation of a hospital between 2015 and 2018 improved or not. In the regression analysis, the dummy variable for level 1 hospital was negatively related to the median rank; however, this impact was not statistically significant.","PeriodicalId":43244,"journal":{"name":"Operations Research and Decisions","volume":"14 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74902949","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
Logarithmic similarity measures on Pythagorean fuzzy sets in the admission process 录取过程中毕达哥拉斯模糊集的对数相似度度量
IF 0.4
Operations Research and Decisions Pub Date : 2022-01-01 DOI: 10.37190/ord220101
Haritika Arora, Anjali Naithani
{"title":"Logarithmic similarity measures on Pythagorean fuzzy sets in the admission process","authors":"Haritika Arora, Anjali Naithani","doi":"10.37190/ord220101","DOIUrl":"https://doi.org/10.37190/ord220101","url":null,"abstract":"The intuitionistic fuzzy sets (IFSs) have a more significant contribution to describing and dealing with uncertainty. The intuitionistic fuzzy measure is a significant consideration in the field of IFSs theory. However, Pythagorean fuzzy sets (PFSs) are an extension of the IFSs. PFSs are more capable of modelling uncertainties than IFSs in real-world decision-making scenarios. The majority of PFSs research has concentrated on establishing decision-making frameworks. A similarity measure is a key concept which measures the closeness of PFSs. IFSs-based similarity measures have been proposed in the literature. This type of similarity measure, however, has a drawback since it cannot satisfy the axiomatic definition of similarity by offering counter-intuitive examples. For this study, a similarity-based on logarithmic function for Pythagorean fuzzy sets (PFSs) is proposed as a solution to the problem. A decision-making approach is presented to ascertain the suitability of careers for aspirants. Additionally, numerical illustration is applied to determine the strength and validity of the proposed similarity measures. The application of the proposed similarity measures is also presented in this article. A comparison of the suggested measures with the existing ones is also demonstrated to ensure the reliability of the measures. The results show that the proposed similarity measures are efficient and reasonable from both numerical and realistic assessments.","PeriodicalId":43244,"journal":{"name":"Operations Research and Decisions","volume":"104 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86198728","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
Project practitioner experience in risk ranking analysis – an empirical study in Malaysia and Singapore 风险排名分析的项目从业经验——马来西亚和新加坡的实证研究
IF 0.4
Operations Research and Decisions Pub Date : 2022-01-01 DOI: 10.37190/ord220208
Der-Jiun Pang, K. Shavarebi, Sokchoo Ng
{"title":"Project practitioner experience in risk ranking analysis – an empirical study in Malaysia and Singapore","authors":"Der-Jiun Pang, K. Shavarebi, Sokchoo Ng","doi":"10.37190/ord220208","DOIUrl":"https://doi.org/10.37190/ord220208","url":null,"abstract":"Despite the Information Technology (IT) sector’s continuing growth driving massive demand for IT project practitioners, the high failure rate of IT projects has caused enormous losses for many organizations. Establishing effective and proactive practice for project risk management (PRM) is imperative. Risk exposure scoring is becoming a critical risk classifier in prioritizing items in descending order, developing plans to address the most significant factors, and leaving the rest on a “watch list”. This study analyzes responses from targeted project managers (PM) in Malaysia-Singapore to a survey. The author ranked the intrinsic risk of projects and investigated the effect of a project practitioner’s level of experience in risk assessment. The results indicated that a project practitioner’s assessments of risk depend on the number of years of experience acquired.","PeriodicalId":43244,"journal":{"name":"Operations Research and Decisions","volume":"5 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77560670","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
Supervisory optimal control using machine learning for building thermal comfort 基于机器学习的建筑热舒适性监督最优控制
IF 0.4
Operations Research and Decisions Pub Date : 2022-01-01 DOI: 10.37190/ord220401
Shokhjakhon Abdufattokhov, Nurilla Mahamatov, Kamila Ibragimova, Dilfuza Gulyamova, Dilyorjon Yuldashev
{"title":"Supervisory optimal control using machine learning for building thermal comfort","authors":"Shokhjakhon Abdufattokhov, Nurilla Mahamatov, Kamila Ibragimova, Dilfuza Gulyamova, Dilyorjon Yuldashev","doi":"10.37190/ord220401","DOIUrl":"https://doi.org/10.37190/ord220401","url":null,"abstract":"For the past few decades, control and building engineering communities have been focusing on thermal comfort as a key factor in designing sustainable building evaluation methods and tools. However, estimating the indoor air temperature of buildings is a complicated task due to the nonlinear and complex building dynamics characterised by the time-varying environment with disturbances. The primary focus of this paper is designing a predictive and probabilistic room temperature model of buildings using Gaussian processes (GPs) and incorporating it into model predictive control (MPC) to minimise energy consumption and provide thermal comfort satisfaction. The full probabilistic capabilities of GPs are exploited from two perspectives: the mean prediction is used for the room temperature model, while the uncertainty is involved in the MPC objective not to lose the desired performance and design a robust controller. We illustrated the potential of the proposed method in a numerical example with simulation results.","PeriodicalId":43244,"journal":{"name":"Operations Research and Decisions","volume":"307 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78356777","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
Analysis of traffic rule violations among bike riders. A structural equation model 自行车骑行者交通违章行为分析。结构方程模型
IF 0.4
Operations Research and Decisions Pub Date : 2022-01-01 DOI: 10.37190/ord220302
B. Adhikari, A. Behera, Rabindra Mahapatra, H. Das
{"title":"Analysis of traffic rule violations among bike riders. A structural equation model","authors":"B. Adhikari, A. Behera, Rabindra Mahapatra, H. Das","doi":"10.37190/ord220302","DOIUrl":"https://doi.org/10.37190/ord220302","url":null,"abstract":"Bikes are becoming an increasingly popular and reliable mode of transportation in developing countries because of their efficiency and ability to navigate through rough terrain and narrow roadways. Bikes are more vulnerable to road accidents and their riders’ safety is the main concern at present days. Hence, it is essential to reduce the possibility of accidents caused by bike riders. The main reason for bike accidents is bike rider behaviours in the form of traffic rules violations. The paper’s main aim is to categorize the importance of seven attributes on traffic rules violations, including bike rider behaviours, road features, ambient conditions, driving skills, type of license, bike age/tenure and riding without a safety device (helmet). Bike riders’ violations that can lead to an accident and the impact of attributes have been analyzed using the structural equation modelling (SEM) technique. To analyze these attributes, 450 bike riders have been interviewed in Bhubaneswar, India. It has been concluded that bike rider behaviours are the most significant attribute of violations. Since most bike riders are young, with low income and education, paying more attention to their training and education before issuing a driving license is necessary. In addition, those who do not use safety devices (helmets) are more susceptible to committing violations. This relates to the lack of enough control and enforcement in developing cities. Also, it shows that the current traffic fines for not using safety devices (helmets) are not enforced enough. Finally, considering this research’s outcomes can help minimize traffic rules violations among bike riders, which is a step towards safer roads.","PeriodicalId":43244,"journal":{"name":"Operations Research and Decisions","volume":"91 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80421828","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
Portfolio management of a small RES utility with a structural vector autoregressive model of electricity markets in Germany 基于德国电力市场结构向量自回归模型的小型可再生能源公用事业投资组合管理
IF 0.4
Operations Research and Decisions Pub Date : 2022-01-01 DOI: 10.37190/ord220405
K. Maciejowska
{"title":"Portfolio management of a small RES utility with a structural vector autoregressive model of electricity markets in Germany","authors":"K. Maciejowska","doi":"10.37190/ord220405","DOIUrl":"https://doi.org/10.37190/ord220405","url":null,"abstract":"Electricity producers and traders are exposed to various risks, among which price and volume risk play very important roles. This research considers portfolio-building strategies that enable the proportion of electricity traded in different electricity markets (day-ahead and intraday) to be chosen dynamically. Two types of approaches are considered: a simple strategy, which assumes that these proportions are fixed, and a data-driven strategy, in which the ratios fluctuate. To explore the market information, a structural vector autoregressive model is applied, which allows one to estimate the relationship between the variables of interest and simulate their future distribution. The approach is evaluated using data from the electricity market in Germany. The outcomes indicate that data-driven strategies increase revenue and reduce trading risk. These financial gains may encourage energy traders to apply advanced statistical methods in their portfolio-building process.","PeriodicalId":43244,"journal":{"name":"Operations Research and Decisions","volume":"29 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83277493","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: 2
A developed nonlinear model for the location-allocation and transportation problems in a cross-docking distribution network 建立了一种求解交叉对接配电网中位置分配和运输问题的非线性模型
IF 0.4
Operations Research and Decisions Pub Date : 2022-01-01 DOI: 10.37190/ord220107
S. Nasrollahi, H. Hosseini-Nasab, Mohamad Bagher Fakhrzad, M. Honarvar
{"title":"A developed nonlinear model for the location-allocation and transportation problems in a cross-docking distribution network","authors":"S. Nasrollahi, H. Hosseini-Nasab, Mohamad Bagher Fakhrzad, M. Honarvar","doi":"10.37190/ord220107","DOIUrl":"https://doi.org/10.37190/ord220107","url":null,"abstract":"The paper addresses the location-allocation and transportation problems in designing a cross-docking distribution network that consists of suppliers, cross-docks, and plants. A developed mixed-integer non-linear model is proposed for a post-distribution cross-docking strategy with multiple cross-docks and products that cross-docks can be connected. The objective function is to minimise the total cost comprising the cost of established cross-docks and transportation costs. To obtain this model, first, two models are introduced and compared (basic non-linear model 1 and non-linear model 2 with the possibility of connections between cross-docks). Results indicate that the total cost is decreased when the connection between cross-docks exists. So, model 2 is more efficient and suitable than model 1. Then, consolidation of plant orders is added to model 2, and the developed model is formulated. Finally, some problems with different sizes are generated randomly and solved by GAMS software to evaluate the model accuracy.","PeriodicalId":43244,"journal":{"name":"Operations Research and Decisions","volume":"10 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81510671","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 heuristic approach to optimizing the loading of homogeneous marine cargo 船舶均质货物装载优化的启发式方法
IF 0.4
Operations Research and Decisions Pub Date : 2022-01-01 DOI: 10.37190/ord220201
Michał Bernardelli
{"title":"A heuristic approach to optimizing the loading of homogeneous marine cargo","authors":"Michał Bernardelli","doi":"10.37190/ord220201","DOIUrl":"https://doi.org/10.37190/ord220201","url":null,"abstract":"In this article, the optimal loading of homogeneous marine cargo is considered. A mathematical formulation in terms of a mixed-integer linear program can be given. Still, the level of complexity turns out to be too high to perform full-scale computations. On the one hand, the reasons for this are the multitude of variables and constraints. On the other hand, feasible solutions to such problems may often be economically unacceptable or simply empty. Therefore, a heuristic is presented, according to which the relaxation of the limiting conditions influencing the solution’s feasibility and its economic profitability was parametrized. Under this heuristic, shifting the deadlines of selected orders is allowed. Also, the assignment of orders to vessels is separated from the allocation of vessels to piers in loading and unloading ports. The solution presented can be easily generalized by adding additional restrictions or features like indirect vessels, founding cost, or differentiation between materials.","PeriodicalId":43244,"journal":{"name":"Operations Research and Decisions","volume":"37 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78058760","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
Simultaneous interpretive structural modelling and weighting (SISMW) 同时解释结构建模和加权(SISMW)
IF 0.4
Operations Research and Decisions Pub Date : 2022-01-01 DOI: 10.37190/ord220106
M. Nasrollahi, Javaneh Ramezani, Mahmoud Sadraei, M. Fathi
{"title":"Simultaneous interpretive structural modelling and weighting (SISMW)","authors":"M. Nasrollahi, Javaneh Ramezani, Mahmoud Sadraei, M. Fathi","doi":"10.37190/ord220106","DOIUrl":"https://doi.org/10.37190/ord220106","url":null,"abstract":"Multi-criteria decision-making (MCDM) methods have been implemented in many fields. In the meantime, several methods have been proposed to obtain the weight of the criteria determined by various methods in different ways. In this paper, a new approach, called simultaneous interpretive structural modelling and weighting (SISMW), is proposed to solve a multi-criterion decision-making (MCDM) problem. Using SISMW, the weight of the criteria and the relationship between them could be determined simultaneously. In this approach, like the ISM method, pair comparison between criteria was made by the decision-maker to determine the relationships among the different criteria. With the help of this data, the weight of the criteria, as well as the causal (cause and effect) relationships between them, were determined in 12 steps. The main advantage of this method is that only one stage of data collection is required for obtaining weights and modelling, and so the research process may be faster. This may increase the reliability of the collected data because, in a one-step survey, the impact of time is minimized. This process can be useful for conceptualizing and developing theories to help decision makers understand the problem better.","PeriodicalId":43244,"journal":{"name":"Operations Research and Decisions","volume":"32 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89785229","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
Neutrosophic compromise programming approach for multiobjective nonlinear transportation problem with supply and demand following the exponential distribution 供需服从指数分布的多目标非线性运输问题的中性折衷规划方法
IF 0.4
Operations Research and Decisions Pub Date : 2022-01-01 DOI: 10.37190/ord220301
A. Adhami, M. Faizan, A. M
{"title":"Neutrosophic compromise programming approach for multiobjective nonlinear transportation problem with supply and demand following the exponential distribution","authors":"A. Adhami, M. Faizan, A. M","doi":"10.37190/ord220301","DOIUrl":"https://doi.org/10.37190/ord220301","url":null,"abstract":"Decision-making is a tedious and complex process. In the present competitive scenario, any incorrect decision may excessively harm an organization. Therefore, the parameters involved in the decision-making process should be looked into carefully as they may not always be of a deterministic nature. In the present study, a multiobjective nonlinear transportation problem is formulated, wherein the parameters involved in the objective functions are assumed to be fuzzy and both supply and demand are stochastic. Supply and demand are assumed to follow the exponential distribution. After converting the problem into an equivalent deterministic form, the multiobjective problem is solved using a neutrosophic compromise programming approach. A comparative study indicates that the proposed approach provides the best compromise solution, which is significantly better than the one obtained using the fuzzy programming approach.","PeriodicalId":43244,"journal":{"name":"Operations Research and Decisions","volume":"141 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77235617","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
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