Journal of Systems Science and Information最新文献_第4页

A Range Adjusted Measure of Super-Efficiency in Integer-Valued Data Envelopment Analysis with Undesirable Outputs 具有不良输出的整数值数据包络分析超效率的范围调整测度

Journal of Systems Science and Information Pub Date : 2021-08-01 DOI: 10.21078/JSSI-2021-378-21

Chunhua Chen, Haohua Liu, Lijun Tang, Jianwei Ren

{"title":"A Range Adjusted Measure of Super-Efficiency in Integer-Valued Data Envelopment Analysis with Undesirable Outputs","authors":"Chunhua Chen, Haohua Liu, Lijun Tang, Jianwei Ren","doi":"10.21078/JSSI-2021-378-21","DOIUrl":"https://doi.org/10.21078/JSSI-2021-378-21","url":null,"abstract":"Abstract DEA (data envelopment analysis) models can be divided into two groups: Radial DEA and non-radial DEA, and the latter has higher discriminatory power than the former. The range adjusted measure (RAM) is an effective and widely used non-radial DEA approach. However, to the best of our knowledge, there is no literature on the integer-valued super-efficiency RAM-DEA model, especially when undesirable outputs are included. We first propose an integer-valued RAM-DEA model with undesirable outputs and then extend this model to an integer-valued super-efficiency RAM-DEA model with undesirable outputs. Compared with other DEA models, the two novel models have many advantages: 1) They are non-oriented and non-radial DEA models, which enable decision makers to simultaneously and non-proportionally improve inputs and outputs; 2) They can handle integer-valued variables and undesirable outputs, so the results obtained are more reliable; 3) The results can be easily obtained as it is based on linear programming; 4) The integer-valued super-efficiency RAM-DEA model with undesirable outputs can be used to accurately rank efficient DMUs. The proposed models are applied to evaluate the efficiency of China’s regional transportation systems (RTSs) considering the number of transport accidents (an undesirable output). The results help decision makers improve the performance of inefficient RTSs and analyze the strengths of efficient RTSs.","PeriodicalId":258223,"journal":{"name":"Journal of Systems Science and Information","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130814150","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: 4

The Effect of Online Channel Addition on Store Performance: Empirical Evidence from Chinese Chain Retailers 线上渠道增加对门店绩效的影响:来自中国连锁零售商的经验证据

Journal of Systems Science and Information Pub Date : 2021-08-01 DOI: 10.21078/JSSI-2021-356-22

Yixin Wang, Qiguo Gong, Ting Wang, Xin-Ming Tian

{"title":"The Effect of Online Channel Addition on Store Performance: Empirical Evidence from Chinese Chain Retailers","authors":"Yixin Wang, Qiguo Gong, Ting Wang, Xin-Ming Tian","doi":"10.21078/JSSI-2021-356-22","DOIUrl":"https://doi.org/10.21078/JSSI-2021-356-22","url":null,"abstract":"Abstract With the rapid development of e-Commerce and takeaway platforms, retailers have gradually developed multi-channel operations. However, limited empirical studies explored the effects of an online channel offered by takeaway platforms on the store performance. Does an online channel addition have a synergy effect or a cannibalization effect on store performance? We empirically investigate these effects by analyzing a large dataset including diverse samples collected from multiple retailers across various regions. The dataset includes 2115 stores across 25 retailers for 10 months that includes two types of retail formats and covers 16 provinces and 21 cities of China. We study the impacts of the newly introduced online channel on the incumbent offline channel and the overall store performance. The empirical results reveal that the online channel addition mainly has a synergy effect. Specifically, for the overall store, it has a positive effect on the sales and product variety, whereas it has a negative effect on the basket size. Surprisingly, an online channel addition also has a positive effect on the offline sales. Our study adds novel values to multi-channel retailing literature by empirically researching the cannibalization and synergy effect of a new type of online channel, offered by takeaway platforms. It can provide insights for retail enterprises who are interested in introducing O2O model.","PeriodicalId":258223,"journal":{"name":"Journal of Systems Science and Information","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127166335","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

Wavelet-Based Elman Neural Network with the Modified Differential Evolution Algorithm for Forecasting Foreign Exchange Rates 基于小波的Elman神经网络与修正差分进化算法的汇率预测

Journal of Systems Science and Information Pub Date : 2021-08-01 DOI: 10.21078/JSSI-2021-421-19

Renquan Huang, Jing Tian

{"title":"Wavelet-Based Elman Neural Network with the Modified Differential Evolution Algorithm for Forecasting Foreign Exchange Rates","authors":"Renquan Huang, Jing Tian","doi":"10.21078/JSSI-2021-421-19","DOIUrl":"https://doi.org/10.21078/JSSI-2021-421-19","url":null,"abstract":"Abstract It is challenging to forecast foreign exchange rates due to the non-linear characters of the data. This paper applied a wavelet-based Elman neural network with the modified differential evolution algorithm to forecast foreign exchange rates. Elman neural network has dynamic characters because of the context layer in the structure. It makes Elman neural network suit for time series problems. The main factors, which affect the accuracy of the Elman neural network, included the transfer functions of the hidden layer and the parameters of the neural network. We applied the wavelet function to replace the sigmoid function in the hidden layer of the Elman neural network, and we found there was a “disruption problem” caused by the non-linear performance of the wavelet function. It didn’t improve the performance of the Elman neural network, but made it get worse in reverse. Then, the modified differential evolution algorithm was applied to train the parameters of the Elman neural network. To improve the optimizing performance of the differential evolution algorithm, the crossover probability and crossover factor were modified with adaptive strategies, and the local enhanced operator was added to the algorithm. According to the experiment, the modified algorithm improved the performance of the Elman neural network, and it solved the “disruption problem” of applying the wavelet function. These results show that the performance of the Elman neural network would be improved if both of the wavelet function and the modified differential evolution algorithm were applied integratedly.","PeriodicalId":258223,"journal":{"name":"Journal of Systems Science and Information","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131182364","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

Blockchain Technology Investment and Sharing Strategy of Port Supply Chain Under Competitive Environment 竞争环境下港口供应链区块链技术投资与共享策略

Journal of Systems Science and Information Pub Date : 2021-06-01 DOI: 10.21078/JSSI-2021-280-30

Jiaguo Liu, Huimin Zhang, Huida Zhao

引用次数: 5

Research on Distributed Data Sharing System based on Internet of Things and Blockchain 基于物联网和区块链的分布式数据共享系统研究

Journal of Systems Science and Information Pub Date : 2021-06-01 DOI: 10.21078/JSSI-2021-239-16

Enchang Sun, Kang Meng, Ruizhe Yang, Yanhua Zhang, Meng Li

引用次数: 6

A Systematic Overview of Blockchain Research 区块链研究系统概述

Journal of Systems Science and Information Pub Date : 2021-06-01 DOI: 10.21078/JSSI-2021-205-34

Gui-ping Wang, Simin Zhang, Tao Yu, Yulin Ning

{"title":"A Systematic Overview of Blockchain Research","authors":"Gui-ping Wang, Simin Zhang, Tao Yu, Yulin Ning","doi":"10.21078/JSSI-2021-205-34","DOIUrl":"https://doi.org/10.21078/JSSI-2021-205-34","url":null,"abstract":"Abstract Blockchain has been receiving growing attention from both academia and practices. This paper aims to investigate the research status of blockchain-related studies and to analyze the development and evolution of this latest hot area via bibliometric analysis. We selected and explored 2451 papers published between 2013 and 2019 from the Web of Science Core Collection database. The analysis considers different dimensions, including annual publications and citation trends, author distribution, popular research themes, collaboration of countries (regions) and institutions, top papers, major publication journals (conferences), supportive funding agencies, and emerging research trends. The results show that the number of blockchain literature is still increasing, and the research priorities in blockchain-related research shift during the observation period from bitcoin, cryptocurrency, blockchain, smart contract, internet of thing, to the distributed ledger, and challenge and the inefficiency of blockchain. The findings of this research deliver a holistic picture of blockchain research, which illuminates the future direction of research, and provides implications for both academic research and enterprise practice.","PeriodicalId":258223,"journal":{"name":"Journal of Systems Science and Information","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133432982","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: 5

Mechanism Construction of Human Resource Management based on Blockchain Technology 基于区块链技术的人力资源管理机制构建

Journal of Systems Science and Information Pub Date : 2021-06-01 DOI: 10.21078/JSSI-2021-310-11

Longyi Li, Huimin Zhang, Yinhong Dong

{"title":"Mechanism Construction of Human Resource Management based on Blockchain Technology","authors":"Longyi Li, Huimin Zhang, Yinhong Dong","doi":"10.21078/JSSI-2021-310-11","DOIUrl":"https://doi.org/10.21078/JSSI-2021-310-11","url":null,"abstract":"Abstract The traditional human resource management system is faced with such problems as the quality of staff recruitment can not be guaranteed, the training performance is not consistent with the actual performance, the enterprise performance appraisal is unfair, and the salary distribution is unfair, which seriously affects the enthusiasm and loyalty of employees and threatens the survival and development of enterprises. In view of the current situation and problems of human resource management system, combined with the technical characteristics of blockchain, this paper proposes a human resource management mechanism based on blockchain technology, in order to achieve the company’s human resource management system accurate, efficient, open and transparent. It is found that there is a good coupling between blockchain technology and human resource management system. This paper constructs a human resource management mechanism based on blockchain, innovates the application scenarios of blockchain technology, and provides certain guiding significance for the establishment of human resource management system and process improvement in the future.","PeriodicalId":258223,"journal":{"name":"Journal of Systems Science and Information","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121905339","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

Blockchain or Not? Optimal Decisions for Food Retailers Considering Consumer Expertise 是不是区块链?考虑消费者专业知识的食品零售商的最优决策

Journal of Systems Science and Information Pub Date : 2021-06-01 DOI: 10.21078/JSSI-2021-321-14

Linyuan Hu, J. Ding, Xiying Yang

引用次数: 2

A Hashing Power Allocation Game with and without Risk-free Asset 有无无风险资产的哈希算力分配博弈

Journal of Systems Science and Information Pub Date : 2021-06-01 DOI: 10.21078/JSSI-2021-255-11

Yukun Cheng, D. Du, Q. Han

引用次数: 0

The Evolutionary Equilibrium of Block Withholding Attack 拦网攻击的进化平衡

Journal of Systems Science and Information Pub Date : 2021-06-01 DOI: 10.21078/JSSI-2021-266-14

Yukun Cheng, Zhiqi Xu, Shuangliang Yao

{"title":"The Evolutionary Equilibrium of Block Withholding Attack","authors":"Yukun Cheng, Zhiqi Xu, Shuangliang Yao","doi":"10.21078/JSSI-2021-266-14","DOIUrl":"https://doi.org/10.21078/JSSI-2021-266-14","url":null,"abstract":"Abstract Bitcoin is the most famous and the most used cryptocurrency in the world, such that it has received extreme popularity in recent years. However the Bitcoin system is accompanied by different attacks, including the block withholding (BWH) attack. When a miner plays the BWH attack, it will withhold all the blocks newly discovered in the attack pool, damaging the honest miners’ right to obtain the fair reward. In this paper, we consider a setting in which two miners may honestly mine or perform the BWH attack in a mining pool. Different strategy profiles will bring different payoffs, in addition influence the selection of the strategies. Therefore, we establish an evolutionary game model to study the behavior tendency of the miners and the evolutionary stable strategies under different conditions, by formulating the replicator dynamic equations. Through numerical simulations, we further verify the theoretical results on evolutionary stable solutions and discuss the impact of the factors on miners’ strategic choice. Based on these simulation results, we also make some recommendations for the manager and the miners to mitigate the BWH attack and to promote the cooperation between miners in a mining pool.","PeriodicalId":258223,"journal":{"name":"Journal of Systems Science and Information","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115088458","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