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Coastal ports efficiency evaluation and analysis when considering undesirable output 考虑不良产出的沿海港口效率评价与分析
Pub Date : 2017-02-28 DOI: 10.1504/IJIDS.2017.10003122
Jie Wu, Jing Liu, Dong Guo
With the rapid development of China's economy, port pollution problems become serious in China. Port efficiency evaluations which take undesirable environmental outputs into consideration tend particularly important. Based on this observation, in this paper, we take pollution emissions as undesirable outputs and employ generalised directional distance function (GDDF) to evaluate the technical efficiency (TE) and comprehensive efficiency (CE) for the 21 coastal ports in China. Results show that: 1) for each of the ports, its CE value is higher than its TE value after considering undesirable output in efficiency evaluation during 2008-2012; 2) TE and CE values of the five port groups differ significantly, and 'strong north and weak south' phenomenon appears; 3) efficiency gaps among ports are obvious; 4) in order to achieve higher CE values, the southeast coastal port group, the southwest coastal port group and the pearl river delta port group need to reduce investment greatly.
随着中国经济的快速发展,港口污染问题日益严重。考虑到不良环境产出的港口效率评价尤为重要。在此基础上,本文以污染排放为不良产出,采用广义定向距离函数(GDDF)对中国21个沿海港口的技术效率(TE)和综合效率(CE)进行了评价。结果表明:1)在2008-2012年的效率评价中,各端口的CE值均高于考虑不良产出后的TE值;2) 5个港口组的TE和CE值差异显著,出现“北强南弱”现象;3)端口间效率差距明显;4)东南沿海港口集团、西南沿海港口集团和珠三角港口集团为实现更高的CE值,需要大幅减少投资。
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引用次数: 2
Probabilistic forecasting of schedule performance using polynomial function 基于多项式函数的调度性能概率预测
Pub Date : 2016-11-28 DOI: 10.1504/IJIDS.2016.10001383
Abdelazeem S. Abdelazeem, A. Ibrahim, Hossam E. Hosny
Using the progress S-curve as a tool for schedule performance forecasting for ongoing projects can improve the capability of project managers for making informed decisions. The objective of this paper is to provide a reliable estimating for the progress S-curve, which leads to better forecast for both the estimated duration at completion (EDAC) and the probability of success (POS) of the project. This study introduces a new probabilistic forecasting method, which is developed on the basis of the polynomial function as a curve fitting technique, for schedule performance control and for risk management of ongoing projects. The polynomial forecasting method (PFM) has been programmed in a graphical user interface (GUI) for Matlab (R2009a) and it can be applied to all types of projects. A comparative study reveals that the PFM provides much more accurate forecasts than those are generated from the conventional deterministic forecasting methods (CDFMs) and as accurate as the critical path method (CPM). Moreover, the PFM provides confidence bounds for predictions, which in turn can help the project managers to make better informed decisions in the form of corrective and/or preventive actions.
使用进度s曲线作为正在进行的项目的进度绩效预测工具,可以提高项目经理做出明智决策的能力。本文的目的是为进度s曲线提供一个可靠的估计,从而更好地预测项目的估计完工时间(EDAC)和成功概率(POS)。本文介绍了一种新的概率预测方法,该方法是在多项式函数作为曲线拟合技术的基础上发展起来的,用于进行中的项目的进度绩效控制和风险管理。在Matlab (R2009a)的图形用户界面(GUI)中编写了多项式预测方法(PFM),该方法可应用于各种类型的工程。对比研究表明,该方法的预测精度远高于传统的确定性预测方法(CDFMs),与关键路径方法(CPM)的预测精度相当。此外,PFM为预测提供了信心范围,这反过来又可以帮助项目经理以纠正和/或预防行动的形式做出更明智的决策。
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引用次数: 1
A framework for spillover effect of corporate social responsibility with a case study of Chinese dairy industry 企业社会责任溢出效应研究框架——以中国乳业为例
Pub Date : 2016-11-28 DOI: 10.1504/IJIDS.2016.10001392
Haixin Zhang, Mengying Zhang, Donghong Ding, Hongwei Liu
The spillover effect of corporate social responsibility gets little attention from researchers. We articulate a research framework for studying the spillover effect of CSR and discuss some essential research issues including the existence and classification of spillover effect, influential factors of spillover effect, the dominance spillover effect and managerial strategies. The discussion results propose useful implication for further empirical research. Furthermore, we operate a case study. By using Sharpe's one-way analysis of variance to estimate the cumulative abnormal return of stocks, the paper expands the research on contagion effect and contrast effect which are two kinds of spillover effect. The results partially support the research framework, provide us some qualitative understanding of spillover effect and propose some managerial implications.
企业社会责任的溢出效应很少受到研究者的关注。本文构建了企业社会责任溢出效应的研究框架,并对溢出效应的存在与分类、溢出效应的影响因素、优势溢出效应和管理策略等关键研究问题进行了探讨。讨论结果为进一步的实证研究提供了有益的启示。此外,我们还进行了案例研究。本文利用夏普的单向方差分析对股票累积异常收益进行估计,扩展了传染效应和对比效应这两种溢出效应的研究。研究结果部分支持了研究框架,为我们提供了对溢出效应的定性理解,并提出了一些管理启示。
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引用次数: 2
Ranking of DMUs with interval cross-efficiencies based on absolute dominance 基于绝对优势的区间交叉效率的dmu排序
Pub Date : 2016-11-28 DOI: 10.1504/IJIDS.2016.10001384
Sheng Ang, Chenchen Yang, Fuguo Zhao, Feng Yang
This paper follows an alternative approach for ranking decision-making units (DMUs) based upon cross-efficiency evaluation in data envelopment analysis (DEA). The approach determines the DMUs' peer-evaluation efficiencies with interval numbers and derives an interval cross-efficiency matrix (CEM), avoiding the need to make a choice of weights according to a specific secondary goal among various alternatives for the decision makers. Absolute dominance is defined to deal with the DMUs with interval efficiencies in the interval CEM. The ranking for all the DMUs is based upon the overall absolute dominance values and any preference information of decision makers are not needed. A numerical example of five enterprise self-innovation projects selection is used for illustration. We also apply the method to performance ranking of 30 National Basketball Association (NBA) teams as a real application and the results show that the western conference has better performance and the southwest division has the best division performance in the 2012-13 regular season.
本文提出了一种基于数据包络分析(DEA)中交叉效率评价的决策单元排序方法。该方法利用区间数确定决策单元的同行评价效率,并推导出区间交叉效率矩阵(CEM),避免了决策者在众多备选方案中根据特定的次要目标进行权重选择。定义了绝对优势来处理层间CEM中具有层间效率的dmu。所有dmu的排名基于总体绝对优势值,不需要决策者的任何偏好信息。以五家企业自主创新项目的选择为例进行了数值分析。并将该方法应用于NBA 30支球队的成绩排名中,结果表明,2012-13赛季常规赛西部赛区表现较好,西南赛区表现最好。
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引用次数: 5
Comparing the effectiveness of intentional preferences versus preferences over specific choices: a user study 比较有意偏好与特定选择偏好的有效性:一项用户研究
Pub Date : 2016-11-28 DOI: 10.1504/IJIDS.2016.10001391
P. Papadakos, Yannis Tzitzikas
Many works have proposed the enrichment of database query languages with preferences, aiding the user to better rank the results. In this work we propose and examine the hypothesis that effective preference specification in many cases presupposes knowledge of the information space and the available choices. Otherwise, the expression of intentional preferences can be a tiresome process, leading to non-optimal results. We designed a user study from an information systems perspective, where participants had to express their preferences for buying a new car (intentional preferences) and then select the most preferred car from a list (preferences over specific choices). The results showed that only 20% of the users expressed intentional preferences that led to the finally selected car. The conducted statistical hypothesis testing supports the results with a 1% error. Consequently, we argue that the ability to gradually express preferences while exploring the available choices is beneficial for effectively and efficiently ranking a set of choices.
许多工作都提出了通过偏好来丰富数据库查询语言,帮助用户更好地对结果进行排序。在这项工作中,我们提出并检验了一个假设,即在许多情况下,有效的偏好规范以信息空间和可用选择的知识为前提。否则,有意偏好的表达可能是一个令人厌烦的过程,导致非最佳结果。我们从信息系统的角度设计了一项用户研究,参与者必须表达他们购买新车的偏好(有意偏好),然后从列表中选择最喜欢的汽车(偏好高于特定选择)。结果显示,只有20%的用户表达了最终选择的汽车的有意偏好。所进行的统计假设检验支持结果,误差为1%。因此,我们认为,在探索可用选择的同时逐渐表达偏好的能力有利于有效地对一组选择进行排名。
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引用次数: 4
A multiobjective fuzzy mathematical model for a supply chain problem with the forward and reverse flows 具有正向和逆向流动的供应链问题多目标模糊数学模型
Pub Date : 2016-11-28 DOI: 10.1504/IJIDS.2016.10001389
Irem Otay, F. Çebi
Reverse logistics has been one of the complex and popular topics drawing attentions of the researchers and practitioners. Recovery of products has many advantages to companies in reducing costs and protecting the environment. In this study, one of the recovery options, namely reuse, is analysed. For this pursuit, a mathematical model is developed to plan production and distribution of the reusable products as well as the new products by considering the forward and reverse flows of the products. The model is a multi-echelon supply chain model composed of multiple customers, multiple distributors, multiple transshipment points, and a factory. Due to vagueness, ambiguity and lack of information in the reverse logistics, the problem is constructed and solved under the fuzzy environment. The model is implemented on a hypothetical supply chain network based on an industrial case, and the results of the model are compared with the results of the other methods.
逆向物流一直是研究人员和实践者关注的一个复杂而热门的话题。产品回收在降低成本和保护环境方面对公司有很多好处。在本研究中,分析了其中一种回收方案,即再利用。为了实现这一目标,通过考虑产品的正向和逆向流动,建立了一个数学模型来计划可重复使用产品和新产品的生产和分配。该模型是由多个客户、多个分销商、多个转运点和一个工厂组成的多级供应链模型。由于逆向物流存在模糊性、模糊性和信息缺失等问题,在模糊环境下构建和解决逆向物流问题。该模型基于一个工业案例,在一个假设的供应链网络上实现,并与其他方法的结果进行了比较。
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引用次数: 3
A comparative analysis of fuzzy-based AHP derived MCDM methods to select the apt heterogeneous wireless network 比较分析了基于模糊层次分析法的MCDM方法对异构无线网络的选择
Pub Date : 2016-08-26 DOI: 10.1504/IJIDS.2016.10000237
V. Sasirekha, M. Ilangkumaran, G. Sakthivel
The selection of the most appropriate network in heterogeneous wireless environment is one of the critical issues to provide the best quality of service (QOS) to the users. The selection of an apt network among various alternatives is a kind of multi criteria decision making (MCDM) problem. The aim of this paper is to describe the applications of three MCDM methods for solving the network selection problem. Fuzzy analytic hierarchy process (FAHP)- VlseKriterijumska Optimizacija I Kompromisno Resenje in Serbian (VIKOR), FAHP-technique for order preference by similarity to ideal solution (TOPSIS) and FAHP-preference ranking organisation method for enrichment evaluation (PROMETHEE) are proposed to choose the best network among the various network alternatives. The ranking performance of various MCDM methods is also compared with each other. This study comprises five alternatives such as wireless local area network (WLAN), general packet radio service (GPRS), universal mobile telecommunication (UMTS), code-division multiple-access (CDMA), worldwide interoperability for microwave access (WIMAX) and ten evaluation criteria namely bandwidth, latency, jitter, throughput, bit error rate, packet loss, re-transmission, cost, security and preference to select the appropriate network.
在异构无线环境中选择最合适的网络是向用户提供最佳服务质量的关键问题之一。在众多备选方案中选择合适的网络是一种多准则决策问题。本文的目的是描述三种MCDM方法在解决网络选择问题中的应用。提出了模糊层次分析法(FAHP)- VlseKriterijumska Optimizacija I Kompromisno Resenje in塞尔维亚语(VIKOR)、基于理想解相似性排序偏好的FAHP技术(TOPSIS)和用于富集评价的FAHP偏好排序组织法(PROMETHEE)来从各种网络方案中选择最佳网络。对各种MCDM方法的排序性能进行了比较。本研究包括无线局域网(WLAN)、通用分组无线业务(GPRS)、通用移动通信(UMTS)、码分多址(CDMA)、微波接入全球互操作性(WIMAX)等5个备选方案,以及带宽、延迟、抖动、吞吐量、误码率、丢包、重传、成本、安全性和选择合适网络的偏好等10个评估标准。
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引用次数: 3
Decision support systems for IT service management IT服务管理的决策支持系统
Pub Date : 2016-08-26 DOI: 10.1504/IJIDS.2016.078588
A. Cater-Steel, Raul Valverde, Anup Shrestha, M. Toleman
Group decision support systems (GDSS) and knowledge-based systems (KBS) have the potential to assist information technology service managers make sound decisions. We use narrative enquiry and reflective processes to review two recent projects that designed decision support system (DSS) tools for IT service management. The software mediated process assessment project includes a GDSS module to enable the selection of processes for assessment. The decision support recommendation system for IT service operation used a knowledge base to provide recommendations specific to the problem domain of IT service support. From the use of prior literature, rigorous methods and empirical evidence, contributions are made to ITSM theory and practice. The process selection decision model is a novel and effective combination of balanced scorecard, SERV-QUAL and the IT infrastructure library (ITIL) guidelines. In terms of methodology, the incorporation of task-technology theory in design science research enables design principles to be articulated. Outcomes from projects of this nature demonstrate exemplary cases of success stories where the primary research objective is to develop innovative solutions that work in practice and are grounded in academic rigour.
群体决策支持系统(GDSS)和基于知识的系统(KBS)具有帮助信息技术服务经理做出合理决策的潜力。我们使用叙述性调查和反思过程来回顾最近两个为IT服务管理设计决策支持系统(DSS)工具的项目。软件中介过程评估项目包括一个GDSS模块,用于选择要评估的过程。IT服务操作的决策支持推荐系统使用知识库提供针对IT服务支持问题域的建议。从使用先前的文献,严谨的方法和经验证据,对ITSM的理论和实践做出了贡献。过程选择决策模型是平衡计分卡、SERV-QUAL和IT基础设施库(ITIL)指南的新颖而有效的组合。在方法论方面,任务技术理论在设计科学研究中的结合使设计原则得以清晰表达。这种性质的项目的成果展示了成功故事的典范案例,其中主要研究目标是开发在实践中起作用的创新解决方案,并以严谨的学术为基础。
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引用次数: 11
Pattern-based knowledge management for e-government service systems 基于模式的电子政务服务系统知识管理
Pub Date : 2016-08-26 DOI: 10.1504/IJIDS.2016.10000238
Dimitris Apostolou
Taking into account the wealth of e-government services and the complexity of interpreting and implementing changes in government regulations, it is highly complex to manage knowledge about e-government service systems. In this paper, we propose a novel approach to enhance knowledge management of e-government service systems that is capable of dealing with dynamic circumstances by providing knowledge to deal with the extensions or modifications that these circumstances require. We present a pattern-based framework that: 1) balances flexibility and reusability in collaborative management of complex human-supported and software-enabled e-government service systems; 2) enables knowledgeable response to dynamic circumstances by utilising design rationale knowledge. We demonstrate that such a synthesis of capabilities for collaboratively reacting to changing circumstances with knowledge to deal with them has a positive impact on the management of e-government service systems.
考虑到电子政务服务的丰富性以及解释和实施政府法规变化的复杂性,管理电子政务服务系统的知识是非常复杂的。在本文中,我们提出了一种新的方法来加强电子政务服务系统的知识管理,通过提供知识来处理这些情况所需要的扩展或修改,从而能够处理动态情况。我们提出了一个基于模式的框架:1)在复杂的人工支持和软件支持的电子政务服务系统的协同管理中平衡灵活性和可重用性;2)通过利用设计原理知识对动态环境做出知识响应。我们证明了这种对变化的环境做出协同反应的能力的综合,以及处理它们的知识,对电子政务服务系统的管理具有积极的影响。
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引用次数: 0
A semantic approach for XML document warehousing and OLAP analysis 用于XML文档存储和OLAP分析的语义方法
Pub Date : 2016-08-26 DOI: 10.1504/IJIDS.2016.078587
S. Meftah, Kaïs Khrouf, J. Feki, C. Soulé-Dupuy
The nature of data sources together with the multiple alternative descriptions for the documents available in these sources are continuously evolving. Furthermore, these changes are speeded up by the spreading out of the web and the intensive use of XML documents. However, the main drawback of the logical structure of XML documents is its poorness of the semantics incarnated in documents. Consequently, the need of an approach for determining a semantic structure for an XML document as well as the development of dedicated software tools to handle this structure reveals as an urgent requirement. This paper attempts to alleviate these drawbacks. Thus, it proposes a new approach for determining a semantic structure for an XML document. This structure helps to get much more benefits from the content of documents especially for the decision-making process that should be enhanced with semantic-OLAP for documents.
数据源的性质以及这些数据源中可用的文档的多种替代描述都在不断发展。此外,web的扩展和XML文档的大量使用加速了这些变化。但是,XML文档的逻辑结构的主要缺点是其体现在文档中的语义很差。因此,迫切需要确定XML文档的语义结构的方法,以及开发处理这种结构的专用软件工具。本文试图减轻这些缺陷。因此,本文提出了一种确定XML文档语义结构的新方法。这种结构有助于从文档的内容中获得更多的好处,特别是对于应该使用文档的语义olap来增强的决策过程。
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引用次数: 3
期刊
Int. J. Inf. Decis. Sci.
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