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A Novel Query Method for Spatial Database Based on Improved K-Nearest Neighbor Algorithm 一种基于改进k近邻算法的空间数据库查询方法
Q3 Computer Science Pub Date : 2023-10-25 DOI: 10.4018/ijdsst.332773
Huili Xia, Feng Xue
Spatial database is a spatial information database and is the core component of geographic information systems (GIS). Aiming at the problem that time complexity of k-nearest neighbor (kNN) querying algorithms are proportionate to scale of training samples, an efficient query method for spatial database based on the Spark framework and the reversed k-nearest neighbor (RkNN) is proposed. Firstly, based on the Spark framework, a two-layer indexing structure based on grid and Voronoi diagram is constructed, and an efficient filtering and a refining processing algorithm are proposed. Secondly, the filtering step of proposed algorithm is used to obtain the candidates, and the refining step is used to remove the candidates. Finally, the candidate sets from different regions are merged to get the final result. Results of experiments on real-world datasets validate that the proposed method has better query performance and better stability and significantly improves the processing speed.
空间数据库是一种空间信息数据库,是地理信息系统的核心组成部分。针对k近邻(kNN)查询算法的时间复杂度与训练样本规模成正比的问题,提出了一种基于Spark框架和反向k近邻(RkNN)的空间数据库查询方法。首先,基于Spark框架,构建了基于网格和Voronoi图的两层索引结构,并提出了一种高效的过滤和细化处理算法;其次,采用所提算法的滤波步骤获得候选点,采用精炼步骤去除候选点;最后,对不同区域的候选集进行合并,得到最终结果。在实际数据集上的实验结果表明,该方法具有更好的查询性能和稳定性,显著提高了处理速度。
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引用次数: 0
Analysis and Evaluation of Roadblocks Hindering Lean-Green and Industry 4.0 Practices in Indian Manufacturing Industries 印度制造业阻碍精益绿色和工业4.0实践的障碍分析与评估
IF 1.1 Q3 Computer Science Pub Date : 2023-07-10 DOI: 10.4018/ijdsst.325350
Rimalini Gadekar, B. Sarkar, Ashish Gadekar
This research is focused on the identification, assessment, analysis, and evaluation of the impact of the most prominent out of many roadblocks impeding the implementation of Lean-Green and I4.0 practices in manufacturing industries. The research methodology is underpinned by an extensive literature review with expert interventions to make it comprehensive and far-reaching. Further, this exploratory research to address the broad objectives is based on a large sample size, which is validated statistically and empirically for its aptness. A combination of widely used statistical methods is used to converge, assess, analyze, and evaluate the impact of each roadblock individually and in the group on I4.0 implementation in industry. The study prominently depicts lack of organizational leadership, unclear waste management practices, and missing environment-friendly practices as the most prominent roadblocks hindering the progression of Lean-Green and I4.0 adoption. The novel PCA-ISM Fuzzy MICMAC integrated model developed in this research makes this article unique.
本研究的重点是识别、评估、分析和评估阻碍制造业实施精益绿色和I4.0实践的众多障碍中最突出的障碍的影响。该研究方法以广泛的文献综述和专家干预为基础,使其全面而深远。此外,这项针对广泛目标的探索性研究是基于大样本量的,其适用性经过了统计和实证验证。广泛使用的统计方法的组合用于聚合、评估、分析和评估每个路障对工业中I4.0实施的影响。该研究突出表明,缺乏组织领导、废物管理实践不明确以及缺乏环保实践是阻碍精益绿色和I4.0采用的最突出障碍。本研究开发的新型PCA-ISM模糊MICMAC集成模型使本文具有独特性。
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引用次数: 0
Developing Fuzzy-AHP-Integrated Hybrid MCDM System of COPRAS-ARAS for Solving an Industrial Robot Selection Problem 开发基于COPRAS-ARAS的模糊AHP集成混合MCDM系统解决工业机器人选择问题
IF 1.1 Q3 Computer Science Pub Date : 2023-06-13 DOI: 10.4018/ijdsst.324599
Shankha Shubhra Goswami, D. Behera
Robots are one of the most commonly used automated material handling equipment (MHE) in an industry, installed to perform a variety of hazardous and repetitive tasks, e.g., loading, unloading, pick-and-place operations, etc. The selection of an appropriate industrial robot is influenced by a number of subjective and objective factors that define its characteristics and working accuracy. As a result, robot selection can be regarded as a multi-criteria decision-making problem. In this article, a new hybrid MCDM model combining COPRAS and ARAS is developed to execute an industrial robot selection process based on three alternatives and five criteria. Fuzzy analytic hierarchy process is integrated to compute the parametric weights. It is discovered that Robot 3 and Robot 1 are coming out to be the best and worst alternative robots from this hybrid model. Finally, comparative analysis among eight other MCDM tools and sensitivity analysis are also performed to assess the stability and robustness of the developed hybrid model and other applied MCDM tools.
机器人是工业中最常用的自动化物料搬运设备(MHE)之一,安装用于执行各种危险和重复的任务,例如,装载,卸载,取放操作等。选择合适的工业机器人受到许多主观和客观因素的影响,这些因素决定了工业机器人的特性和工作精度。因此,机器人的选择可以看作是一个多准则决策问题。在本文中,开发了一种新的混合MCDM模型,结合COPRAS和ARAS来执行基于三个备选方案和五个标准的工业机器人选择过程。采用模糊层次分析法计算参数权重。结果表明,机器人3和机器人1分别是该混合模型中最佳和最差的替代机器人。最后,对其他8种MCDM工具进行了比较分析和敏感性分析,以评估所开发的混合模型和其他应用MCDM工具的稳定性和鲁棒性。
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引用次数: 2
Generalized Parametric Intuitionistic Fuzzy Measures Based on Trigonometric Functions for Improved Decision-Making Problem 基于三角函数的广义参数直觉模糊测度改进决策问题
IF 1.1 Q3 Computer Science Pub Date : 2023-05-22 DOI: 10.4018/ijdsst.323444
Pawan Gora, V. P. Tomar
Information theory is the study of collecting, storing, and sharing digital information. It is a nexus of disciplines such as statistics, computer science, statistical mechanics, and probability theory. This study pertains to intuitionistic fuzzy sets theory, which is a substantial component of fuzzy set theory. Nonetheless, the motive of the study is to find vague information intuitionistic fuzzy entropy measures. The authors are extend the parametric intuitionistic fuzzy entropy measures by using trigonometric functions and investigate the difference between proposed study & existing entropy measures. Furthermore, discuss the significance analysis and authenticity of the proposed study. It concludes that the proposed measure could be a good perspective for decision-making problems. Using a suitable illustration, the applicability of the proposed study has been demonstrated. Depict the graph of proposed and existing entropy measure together with their average measure. Additionally, these estimations enhance the study of information theory and produce superior information.
信息论是研究收集、存储和共享数字信息的学科。它是统计学、计算机科学、统计力学和概率论等学科的联系。本研究涉及直觉模糊集理论,它是模糊集理论的重要组成部分。然而,研究的动机是寻找模糊信息的直觉模糊熵测度。利用三角函数对参数直觉模糊熵测度进行了扩展,并探讨了本文研究的模糊熵测度与现有熵测度的区别。进一步,讨论了本研究的意义分析和真实性。它的结论是,拟议的措施可能是决策问题的一个很好的视角。用一个合适的例子,证明了所提出的研究的适用性。描述了所提出的熵测度和现有熵测度及其平均测度的图。此外,这些估计促进了信息论的研究,并产生了优质的信息。
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引用次数: 1
An Efficient Method to Decide the Malicious Traffic 一种判定恶意流量的有效方法
IF 1.1 Q3 Computer Science Pub Date : 2023-05-12 DOI: 10.4018/ijdsst.323191
Ajay Kumar, Jitendra Singh, Vikas Kumar, Saurabh Shrivastava
To address the high rate of false alarms, this article proposed a voting-based method to efficiently predict intrusions in real time. To carry out this study, an intrusion detection dataset from UNSW was downloaded and preprocessed before being used. Given the number of features at hand and the large size of the dataset, performance was poor while accuracy was low. This low prediction accuracy led to the generation of false alerts, consequently, legitimate alerts used to pass without an action assuming them as false. To deal with large size and false alarms, the proposed voting-based feature reduction approach proved to be highly beneficial in reducing the dataset size by selecting only the features secured majority votes. Outcome collected prior to and following the application of the proposed model were compared. The findings reveal that the proposed approach required less time to predict, at the same time predicted accuracy was higher. The proposed approach will be extremely effective at detecting intrusions in real-time environments and mitigating the cyber-attacks.
为了解决误报率高的问题,本文提出了一种基于投票的方法来有效地实时预测入侵。为了进行这项研究,从新南威尔士大学下载了一个入侵检测数据集,并在使用前进行了预处理。考虑到手头的特征数量和数据集的大尺寸,性能较差,而准确性较低。这种低预测准确率导致了虚假警报的产生,因此,合法警报过去常常在没有采取行动的情况下通过,并认为它们是虚假的。为了处理大尺寸和误报,所提出的基于投票的特征约简方法被证明通过只选择获得多数投票的特征来降低数据集的大小是非常有益的。比较了在应用拟议模型之前和之后收集的结果。研究结果表明,所提出的方法需要较少的预测时间,同时预测精度更高。所提出的方法在实时环境中检测入侵和减轻网络攻击方面将非常有效。
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引用次数: 0
Barriers in Replacement of Conventional Vehicles by Electric Vehicles in India 印度电动汽车取代传统汽车的障碍
IF 1.1 Q3 Computer Science Pub Date : 2023-05-12 DOI: 10.4018/ijdsst.323135
Disha Bhattacharyya, Sudeepta Pradhan, Shabbiruddin
Electric vehicles are an emerging and evolving technology that brings in remarkable environmental gains over conventional vehicles, contributing significantly towards a decrease in fossil fuel dependence. However, infiltrating into the existing automobile market requires huge investment in charging facilities and intricate planning to make it more approachable to the consumers. Identifying the crucial challenges and finding a solution has been a major hurdle to the manufacturers. While various non-government agencies and government policies are urging both consumers and manufacturers to adopt electric mobility, many industries remain unguided. The paper aims to identify, study, and rank 12 of these influential challenges faced by the manufacturers based on their impact on enhancing the manufacturing and sales of electric vehicles in India using the triangular fuzzy number (TFN) method. Results obtained reveal that inadequate charging infrastructure is one of the biggest hurdles.
电动汽车是一种新兴的、不断发展的技术,与传统汽车相比,它带来了显著的环境效益,对减少对化石燃料的依赖做出了重大贡献。然而,渗透到现有的汽车市场需要大量的充电设施投资和复杂的规划,使其更接近消费者。识别关键挑战并找到解决方案一直是制造商面临的主要障碍。虽然各种非政府机构和政府政策都在敦促消费者和制造商采用电动汽车,但许多行业仍然没有得到指导。本文旨在使用三角模糊数(TFN)方法,根据制造商对提高印度电动汽车的制造和销售的影响,识别、研究和排名12个制造商面临的这些有影响力的挑战。结果显示,充电基础设施不足是最大的障碍之一。
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引用次数: 0
Improving Coronary Artery Disease Prediction: Use of Random Forest, Feature Importance and Case-Based Reasoning 改进冠状动脉疾病预测:使用随机森林、特征重要性和基于案例的推理
IF 1.1 Q3 Computer Science Pub Date : 2023-03-23 DOI: 10.4018/ijdsst.319307
F. Henni, B. Atmani, F. Atmani, F. Saadi
Cardiovascular diseases (CVDs) are the number one cause of death globally. Coronary artery disease (CAD) is the most common form of CVDs. Abundant research works propose decision support systems for CAD early detection. Most of proposed solutions have their origins in the realm of machine learning and datamining. This paper presents two solutions for CAD prediction. The first solution optimizes a random forest model (RFM) through hyperparameters tuning. The second solution uses a case-based reasoning (CBR) methodology. The CBR solution takes advantage of feature importance to improve the execution time of the retrieve step in the CBR cycle. The experimentations show that the RFM outperformed most recent published models for CAD diagnosis. By reducing the number of attributes, the CBR solution improves the execution time and also performs very well in terms of diagnosis accuracy. The performance of the CBR solution is intended to be enhanced because CBR is a learning methodology.
心血管疾病(cvd)是全球头号死因。冠状动脉疾病(CAD)是最常见的心血管疾病。大量的研究工作提出了CAD早期检测的决策支持系统。大多数提出的解决方案都起源于机器学习和数据挖掘领域。本文提出了CAD预测的两种解决方案。第一个解决方案通过超参数调优来优化随机森林模型(RFM)。第二个解决方案使用基于案例的推理(CBR)方法。CBR解决方案利用特征重要性来改进CBR循环中检索步骤的执行时间。实验表明,RFM优于最近发表的CAD诊断模型。通过减少属性的数量,CBR解决方案改善了执行时间,并且在诊断准确性方面也表现得非常好。由于CBR是一种学习方法,因此CBR解决方案的性能将得到增强。
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引用次数: 0
Collaborative Decision Making (CDM) in Emergency Caused by Captain Incapacitation: Deterministic and Stochastic Modelling 机长失能紧急情况下的协同决策:确定性与随机模型
IF 1.1 Q3 Computer Science Pub Date : 2023-03-22 DOI: 10.4018/ijdsst.320477
T. Shmelova, Maxim Yatsko, Iurii Sierostanov
The authors present a new approach to decision-making to ensure the proper collaboration of different personnel. Models are used in intelligent integrated decision support systems, especially for actions in emergencies. Behavioral deterministic models are used for synchronization actions of all operators, to support and timely predicting of operators' actions in an emergency. To determine the quantitative characteristics of risk levels, models for collaborative decision making (CDM) under uncertainty by the operators (pilots, air traffic controllers, flight/dispatch), and other invited specialists, have been developed. The decision-making modeling of a group of operators in case of an emergency situation such as “pilot incapacitation” was presented. The methodological basis for CDM in certainty is network planning, in conditions of Stochastic uncertainty – is a decision tree, in conditions of non-stochastic uncertainty – is a matrix of decisions, and outcomes are made this using the expert judgment method for obtaining quantity estimations.
作者提出了一种新的决策方法,以确保不同人员的适当协作。模型用于智能综合决策支持系统,特别是在紧急情况下的行动。采用行为确定性模型对所有操作人员的行动进行同步,支持并及时预测紧急情况下操作人员的行动。为了确定风险水平的定量特征,开发了操作员(飞行员、空中交通管制员、飞行/调度)和其他受邀专家在不确定性下的协同决策(CDM)模型。提出了“飞行员失能”等紧急情况下一组操作员的决策模型。在确定性条件下CDM的方法基础是网络规划,在随机不确定性条件下是决策树,在非随机不确定性条件下是决策矩阵,并利用专家判断法获得数量估计来得出结果。
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引用次数: 0
A Multi-Criteria Decision-Making Model for Selecting a Maturity Model 成熟度模型选择的多准则决策模型
IF 1.1 Q3 Computer Science Pub Date : 2023-03-09 DOI: 10.4018/ijdsst.319305
João Batista Sarmento dos Santos-Neto, A. Costa
This paper proposes a decision model for a maturity model choice problem via the multiple-criteria decision analysis method. The authors implemented the model in FITradeoff decision support system to select a project management maturity model for a Brazilian industry operating in the sector of distributing natural gas. FITradeoff is a flexible and interactive procedure of elicitation for multi-criteria additive models that requires only partial information from the decision maker (i.e., there is no need to elicit very detailed information from the decision maker, an approach that the decision maker can find laborious and tiring). The authors observed that the use of a multi-criteria approach imposes certain rigor and pattern on the decision process to select a maturity model in project management. Applying the model enabled comparison of information from the four maturity models and therefore selecting a project management maturity model based on the decision-maker preferences.
利用多准则决策分析方法,提出了一个成熟度模型选择问题的决策模型。作者将该模型应用于FITradeoff决策支持系统,为巴西某天然气分销行业选择项目管理成熟度模型。FITradeoff是一种灵活的、交互式的多标准附加模型的启发过程,它只需要决策者提供部分信息(即,不需要从决策者那里获得非常详细的信息,这种方法会让决策者感到费力和疲惫)。作者观察到,在项目管理中,使用多标准方法对选择成熟度模型的决策过程施加了一定的严谨性和模式。应用该模型可以对来自四个成熟度模型的信息进行比较,从而根据决策者的偏好选择项目管理成熟度模型。
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引用次数: 1
What Can Managers Learn From Professional Poker Players About Decision-Making? 经理人能从职业扑克玩家身上学到什么决策?
IF 1.1 Q3 Computer Science Pub Date : 2023-03-03 DOI: 10.4018/ijdsst.319308
M. Alvarenga, L. Sincorá, Marcos Paulo Valadares de Oliveira, L. Fantinel, Mauri Leodir Löbler
This paper aims to investigate how past decision-making experiences can improve future decision-making. Nine semi-structured interviews were conducted with profitable professional Poker players. The results point out that it is the knowledge background of the decision-maker that makes him make sense of the situations he experiences. The research findings allowed the identification of three mechanisms that facilitate and make future decisions faster and more appropriate based on past experiences: (1) memory, (2) reflection, and (3) tools and analytical approach. The research contributes by showing evidence that, when supported by analytical tools, decision-makers can improve the quality and speed of the decision-making process. For organizations and supply chains, the paper highlights the importance of recognizing patterns based on the past to make sense of the future. For operations management, in events like COVID-19, companies can take advantage of memory to enact over unprecedented scenarios, prevent disruptions, and recover.
本文旨在探讨过去的决策经验如何改善未来的决策。对盈利的职业扑克玩家进行了九次半结构化访谈。结果表明,决策者的知识背景使他能够理解他所经历的情况。研究结果表明,在过去的经验基础上,有三种机制有助于更快、更恰当地做出未来的决策:(1)记忆;(2)反思;(3)工具和分析方法。这项研究的贡献在于提供了证据,证明在分析工具的支持下,决策者可以提高决策过程的质量和速度。对于组织和供应链,本文强调了基于过去认识模式的重要性,以使未来有意义。对于运营管理而言,在COVID-19等事件中,公司可以利用内存来应对前所未有的情况,防止中断并进行恢复。
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引用次数: 0
期刊
International Journal of Decision Support System Technology
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