A novel arithmetic operation function utilizing height of interval type-2 fuzzy sets to express risk preference: case study of remotely controlled autonomous ship

IF 5.5 2区工程技术 Q1 ENGINEERING, CIVIL

Ocean Engineering Pub Date : 2025-09-27 DOI:10.1016/j.oceaneng.2025.122940

Cunlong Fan , Yongquan Chen , Shiqi Fan , Shanshan Fu , Chengpeng Wan , Yongtao Xi , Zaili Yang

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引用次数: 0

Abstract

Risk analysis for maritime emerging technology relies on subjective data derived from the knowledge, experiences, and individual characteristics of seafarers or experts. Risk preference is a key indicator in maritime emergencies, playing a significant role in risk analysis. This study uses interval type-2 fuzzy sets (IT2FSs) to represent risk preference and focuses on the associated arithmetic operation performed on the reference points and heights. Therefore, a function is proposed to integrate the reciprocal influences of the height of IT2FS for three types of risk preferences; namely, caution, impartiality, and adventurousness, with uncertainty. The proposed function is used to define arithmetic operations for the IT2FSs, including addition, subtraction, multiplication, division, multiplication by a crisp number, and exponentiation operations. Furthermore, case studies are conducted to validate and demonstrate that the proposed arithmetic operations apply to the fuzzy risk analysis and risk criteria design processes. The results of a case study reveal that a conservative expert increases the assessed risk and lowers its uncertainty. By contrast, the more radical the expert, the less important the consequence of the autonomous ship. Finally, this study discusses various functions, evaluating their computational time and performance, and recommends the most suitable options.

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一种利用区间2型模糊集高度表达风险偏好的算法运算函数：以遥控自主船舶为例

海事新兴技术的风险分析依赖于来自海员或专家的知识、经验和个人特征的主观数据。风险偏好是海上突发事件的关键指标，在风险分析中起着重要作用。本研究使用区间2型模糊集（it2fs）来表示风险偏好，并重点研究对参考点和高度进行的相关算术运算。因此，我们提出了一个函数来整合IT2FS高度对三类风险偏好的相互影响；也就是说，谨慎，公正，冒险，不确定。所建议的函数用于定义it2fs的算术运算，包括加、减、乘、除、乘一个简单的数字，以及取幂运算。此外，通过案例研究验证和论证了所提出的算术运算适用于模糊风险分析和风险准则设计过程。一个案例研究的结果表明，一个保守的专家增加了评估的风险，降低了其不确定性。相比之下，专家越激进，自动驾驶船的后果就越不重要。最后，本研究讨论了各种函数，评估了它们的计算时间和性能，并推荐了最合适的选项。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ocean Engineering 工程技术-工程：大洋

CiteScore

7.30

自引率

34.00%

发文量

2379

审稿时长

8.1 months

期刊介绍： Ocean Engineering provides a medium for the publication of original research and development work in the field of ocean engineering. Ocean Engineering seeks papers in the following topics.