期刊文献+
共找到35,735篇文章
< 1 2 250 >
每页显示 20 50 100
基于AIS数据的内河引航水域态势感知方法研究
1
作者 任志鹏 曹金海 +2 位作者 徐光华 李洪刚 李宁 《中国水运》 2026年第6期6-8,共3页
内河引航作业中,引航员需实时感知航行水域的交通态势,为航行决策提供支持。文中基于AIS数据,研究船舶轨迹恢复、行为特征表征及复杂水域识别三个关键问题。针对内河弯曲航段AIS数据缺失问题,提出基于双向LSTM的轨迹恢复模型,提高修复... 内河引航作业中,引航员需实时感知航行水域的交通态势,为航行决策提供支持。文中基于AIS数据,研究船舶轨迹恢复、行为特征表征及复杂水域识别三个关键问题。针对内河弯曲航段AIS数据缺失问题,提出基于双向LSTM的轨迹恢复模型,提高修复精度。针对船舶操纵行为识别需求,采用滑动窗口法提取操纵特征,建立船舶行为特征指标体系。针对复杂水域辨识需求,采用DBSCAN聚类算法对船舶高频操纵区域进行识别。经长江镇江段152万余条AIS数据验证,双向LSTM模型的均方根误差为2.8m、平均绝对误差为2.1m、决定系数达0.953,相比单向LSTM分别提升46.2%和53.3%。成功识别出航道交汇区、弯曲航段等六类典型复杂水域,船舶行为识别准确率达92.3%,可为引航员提供航前风险预判、航行中态势监控等决策支持。 展开更多
关键词 内河引航 ais数据 态势感知 船舶行为特征 复杂水域识别
在线阅读 下载PDF
基于深度时空自编码网络的船舶AIS轨迹异常行为检测方法
2
作者 董海亮 张梁 +1 位作者 阳建中 甘兆斌 《舰船科学技术》 北大核心 2026年第5期146-150,共5页
传统人工监管方式难以适配大规模AIS(Automatic Identification System)轨迹数据的分析需求。本文构建了适配AIS数据质量特性的预处理体系,提出深度时空自编码网络(ST-AE)模型,通过CNN与Bi-LSTM协同融合架构及注意力机制捕捉轨迹时空依... 传统人工监管方式难以适配大规模AIS(Automatic Identification System)轨迹数据的分析需求。本文构建了适配AIS数据质量特性的预处理体系,提出深度时空自编码网络(ST-AE)模型,通过CNN与Bi-LSTM协同融合架构及注意力机制捕捉轨迹时空依赖关系,结合轻量化设计实现检测精度与实时性的平衡,并配套设计模型训练策略与自适应异常判定机制。基于AIS数据集构建实验环境,选取滑动窗口+3σ阈值、随机森林、常规LSTM自编码等主流方法与本文模型进行对比,结果表明ST-AE模型在准确率、召回率及实时性上均优于其他3种方法,可有效适配多种船舶异常行为检测需求。研究结果可为海事智能监管提供了可靠的技术支撑。 展开更多
关键词 ais轨迹数据 异常轨迹检测 深度时空自编码网络 时空融合 注意力机制 海事智能监管
在线阅读 下载PDF
雷达与AIS融合技术在船舶态势感知中的应用
3
作者 胡嘉龙 《船舶物资与市场》 2026年第2期119-121,共3页
船舶态势感知的核心在于对航区内船舶目标状态与运动行为进行全面获取,雷达具备全天候获取目标信息的能力,而自动识别系统(Automatic Identification System,AIS)则根据船舶自主广播方式提供船名等身份与航行意图信息,其融合可在时空互... 船舶态势感知的核心在于对航区内船舶目标状态与运动行为进行全面获取,雷达具备全天候获取目标信息的能力,而自动识别系统(Automatic Identification System,AIS)则根据船舶自主广播方式提供船名等身份与航行意图信息,其融合可在时空互补与态势增强等方面形成协同优势,以提升船舶态势感知精度。本文基于雷达与AIS融合技术,构建船舶态势感知模型,并结合实际应用场景对航区船舶目标识别及航迹连续跟踪等关键应用进行研究。 展开更多
关键词 雷达 ais 态势感知 数据融合 航迹跟踪
在线阅读 下载PDF
船舶虚假AIS信号分析和整治
4
作者 王代楠 陈琼 《青岛远洋船员职业学院学报》 2026年第1期19-22,51,共5页
AIS是当前航运领域应用最为广泛的船舶自动识别系统,在航行安全、海事管理、事故调查以及数据统计等方面均发挥着至关重要的作用。然而,在实际运行过程中,不法分子借助虚假AIS信号逃避执法部门的监管,给正常航运和水上交通安全带来了重... AIS是当前航运领域应用最为广泛的船舶自动识别系统,在航行安全、海事管理、事故调查以及数据统计等方面均发挥着至关重要的作用。然而,在实际运行过程中,不法分子借助虚假AIS信号逃避执法部门的监管,给正常航运和水上交通安全带来了重大安全隐患。本文梳理了几种常见的虚假AIS信号实现方式,剖析了虚假AIS信号的特点,探讨了虚假AIS信号识别的思路与方法,并从技术、履约和监管层面提出了虚假AIS信号整治建议。 展开更多
关键词 水上无线电 虚假ais信号 ais整治
在线阅读 下载PDF
船舶自主航行系统中电子海图与AIS数据动态融合方法
5
作者 李志刚 《船舶物资与市场》 2026年第2期116-118,共3页
伴随着海事智能化进程的发展,船舶自主航行系统对于导航数据的精度与实时性的要求也越来越高。电子海图属于静态的基础数据源,给予海域地形、航道、障碍物等信息,自动识别系统(AIS)会实时发送周围船舶的动态位置,航向以及航速数据。但... 伴随着海事智能化进程的发展,船舶自主航行系统对于导航数据的精度与实时性的要求也越来越高。电子海图属于静态的基础数据源,给予海域地形、航道、障碍物等信息,自动识别系统(AIS)会实时发送周围船舶的动态位置,航向以及航速数据。但是两类数据在时空基准、更新频率、数据格式上存在较大的差异,造成融合过程中出现数据异构、信号缺失、实时性不足等问题。本文对电子海图与AIS数据动态融合的必要性进行了分析,分析了电子海图与AIS数据动态融合过程中存在的数据源异构、信号质量波动、计算资源受限等问题,并给出了基于时空配准、卡尔曼滤波轨迹预测、动态碰撞风险评估的融合方法。 展开更多
关键词 船舶自主航行 电子海图 ais数据 数据融合 态势感知
在线阅读 下载PDF
基于AIS信息共享机制的故障船舶避碰效能研究
6
作者 林洋 孙成杰 《航海》 2026年第1期33-34,共2页
本研究针对船舶机电故障引发的碰撞事故,提出基于AIS的机电故障预警机制。首先,通过分析辖区机电故障导致船舶碰撞的案例,发现故障信息传递的滞后性是导致碰撞事故主要因素;然后,通过分析辖区机电故障类型,探讨了通过AIS采集及实时共享... 本研究针对船舶机电故障引发的碰撞事故,提出基于AIS的机电故障预警机制。首先,通过分析辖区机电故障导致船舶碰撞的案例,发现故障信息传递的滞后性是导致碰撞事故主要因素;然后,通过分析辖区机电故障类型,探讨了通过AIS采集及实时共享船舶故障信息从而达到碰撞预防的可行性;最后,提出了现阶段实现AIS机电故障预警需要解决的问题及解决方案。 展开更多
关键词 ais 机电故障 碰撞预防
在线阅读 下载PDF
AI Agents in Finance and Fintech: A Scientific Review of Agent-Based Systems, Applications, and Future Horizons
7
作者 Maryan Rizinski Dimitar Trajanov 《Computers, Materials & Continua》 2026年第1期173-206,共34页
Artificial intelligence(AI)is reshaping financial systems and services,as intelligent AI agents increasingly form the foundation of autonomous,goal-driven systems capable of reasoning,learning,and action.This review s... Artificial intelligence(AI)is reshaping financial systems and services,as intelligent AI agents increasingly form the foundation of autonomous,goal-driven systems capable of reasoning,learning,and action.This review synthesizes recent research and developments in the application of AI agents across core financial domains.Specifically,it covers the deployment of agent-based AI in algorithmic trading,fraud detection,credit risk assessment,roboadvisory,and regulatory compliance(RegTech).The review focuses on advanced agent-based methodologies,including reinforcement learning,multi-agent systems,and autonomous decision-making frameworks,particularly those leveraging large language models(LLMs),contrasting these with traditional AI or purely statistical models.Our primary goals are to consolidate current knowledge,identify significant trends and architectural approaches,review the practical efficiency and impact of current applications,and delineate key challenges and promising future research directions.The increasing sophistication of AI agents offers unprecedented opportunities for innovation in finance,yet presents complex technical,ethical,and regulatory challenges that demand careful consideration and proactive strategies.This review aims to provide a comprehensive understanding of this rapidly evolving landscape,highlighting the role of agent-based AI in the ongoing transformation of the financial industry,and is intended to serve financial institutions,regulators,investors,analysts,researchers,and other key stakeholders in the financial ecosystem. 展开更多
关键词 Artificial intelligence AI agents agentic architectures FINANCE fintech financial services
在线阅读 下载PDF
From"Technology+"to"AI+":Reconstruction Path of Practical Curriculum System for Smart Agriculture Majors in Universities and Exploration of Practice at Yulin Normal University
8
作者 Na ZHAO Wei HUANG +2 位作者 Guoren LAO Lei LIU Daobo WANG 《Meteorological and Environmental Research》 2026年第1期52-54,59,共4页
The deep integration of artificial intelligence technology and agricultural industry has pushed smart agriculture into a new stage of"AI+scenario",and put forward a transformation requirement for the talent ... The deep integration of artificial intelligence technology and agricultural industry has pushed smart agriculture into a new stage of"AI+scenario",and put forward a transformation requirement for the talent cultivation of smart agriculture major in universities from"technology application"to"intelligent innovation".In response to the problems of insufficient AI integration,lack of contextualization,and insufficient collaboration between industry and education in the traditional"technology+"practical course system,this paper takes the smart agriculture major at Yulin Normal University as an example to construct a"AI+agriculture"practical course reconstruction framework and propose a four-dimensional transformation path of"goal-content-mode-evaluation".Through the practical exploration of modular curriculum design,scenario based practical design,integration of industry and education,and intelligent evaluation reform,a practical teaching system with local application-oriented university characteristics has been formed,providing a reference example for the cultivation of smart agriculture professionals under the background of new agricultural science. 展开更多
关键词 Smart agriculture Practical curriculum system AI+ Reconstruction path Applied universities
在线阅读 下载PDF
The Transparency Revolution in Geohazard Science:A Systematic Review and Research Roadmap for Explainable Artificial Intelligence
9
作者 Moein Tosan Vahid Nourani +5 位作者 Ozgur Kisi Yongqiang Zhang Sameh A.Kantoush Mekonnen Gebremichael Ruhollah Taghizadeh-Mehrjardi Jinhui Jeanne Huang 《Computer Modeling in Engineering & Sciences》 2026年第1期77-117,共41页
The integration of machine learning(ML)into geohazard assessment has successfully instigated a paradigm shift,leading to the production of models that possess a level of predictive accuracy previously considered unatt... The integration of machine learning(ML)into geohazard assessment has successfully instigated a paradigm shift,leading to the production of models that possess a level of predictive accuracy previously considered unattainable.However,the black-box nature of these systems presents a significant barrier,hindering their operational adoption,regulatory approval,and full scientific validation.This paper provides a systematic review and synthesis of the emerging field of explainable artificial intelligence(XAI)as applied to geohazard science(GeoXAI),a domain that aims to resolve the long-standing trade-off between model performance and interpretability.A rigorous synthesis of 87 foundational studies is used to map the intellectual and methodological contours of this rapidly expanding field.The analysis reveals that current research efforts are concentrated predominantly on landslide and flood assessment.Methodologically,tree-based ensembles and deep learning models dominate the literature,with SHapley Additive exPlanations(SHAP)frequently adopted as the principal post-hoc explanation technique.More importantly,the review further documents how the role of XAI has shifted:rather than being used solely as a tool for interpreting models after training,it is increasingly integrated into the modeling cycle itself.Recent applications include its use in feature selection,adaptive sampling strategies,and model evaluation.The evidence also shows that GeoXAI extends beyond producing feature rankings.It reveals nonlinear thresholds and interaction effects that generate deeper mechanistic insights into hazard processes and mechanisms.Nevertheless,several key challenges remain unresolved within the field.These persistent issues are especially pronounced when considering the crucial necessity for interpretation stability,the demanding scholarly task of reliably distinguishing correlation from causation,and the development of appropriate methods for the treatment of complex spatio-temporal dynamics. 展开更多
关键词 Explainable artificial intelligence(XAI) geohazard assessment machine learning SHAP trustworthy AI model interpretability
在线阅读 下载PDF
Big Data-Driven Federated Learning Model for Scalable and Privacy-Preserving Cyber Threat Detection in IoT-Enabled Healthcare Systems
10
作者 Noura Mohammed Alaskar Muzammil Hussain +3 位作者 Saif Jasim Almheiri Atta-ur-Rahman Adnan Khan Khan M.Adnan 《Computers, Materials & Continua》 2026年第4期793-816,共24页
The increasing number of interconnected devices and the incorporation of smart technology into contemporary healthcare systems have significantly raised the attack surface of cyber threats.The early detection of threa... The increasing number of interconnected devices and the incorporation of smart technology into contemporary healthcare systems have significantly raised the attack surface of cyber threats.The early detection of threats is both necessary and complex,yet these interconnected healthcare settings generate enormous amounts of heterogeneous data.Traditional Intrusion Detection Systems(IDS),which are generally centralized and machine learning-based,often fail to address the rapidly changing nature of cyberattacks and are challenged by ethical concerns related to patient data privacy.Moreover,traditional AI-driven IDS usually face challenges in handling large-scale,heterogeneous healthcare data while ensuring data privacy and operational efficiency.To address these issues,emerging technologies such as Big Data Analytics(BDA)and Federated Learning(FL)provide a hybrid framework for scalable,adaptive intrusion detection in IoT-driven healthcare systems.Big data techniques enable processing large-scale,highdimensional healthcare data,and FL can be used to train a model in a decentralized manner without transferring raw data,thereby maintaining privacy between institutions.This research proposes a privacy-preserving Federated Learning–based model that efficiently detects cyber threats in connected healthcare systems while ensuring distributed big data processing,privacy,and compliance with ethical regulations.To strengthen the reliability of the reported findings,the resultswere validated using cross-dataset testing and 95%confidence intervals derived frombootstrap analysis,confirming consistent performance across heterogeneous healthcare data distributions.This solution takes a significant step toward securing next-generation healthcare infrastructure by combining scalability,privacy,adaptability,and earlydetection capabilities.The proposed global model achieves a test accuracy of 99.93%±0.03(95%CI)and amiss-rate of only 0.07%±0.02,representing state-of-the-art performance in privacy-preserving intrusion detection.The proposed FL-driven IDS framework offers an efficient,privacy-preserving,and scalable solution for securing next-generation healthcare infrastructures by combining adaptability,early detection,and ethical data management. 展开更多
关键词 Intrusion detection systems cyber threat detection explainable AI big data analytics federated learning
在线阅读 下载PDF
Genuinely Intelligent Ties China and Thailand are leveraging AI to transform bilateral cooperation from efficiency-driven coordination into systemic, sustainable co-development with regional impact
11
作者 Ou Weiyong Chen Bingbing 《China Report ASEAN》 2026年第3期58-62,共5页
In recent years, the digital economy has become a key driver of deepening China-Thailand cooperation. As trade and industrial digitalization advance, artificial intelligence (AI), an essential force in the new wave of... In recent years, the digital economy has become a key driver of deepening China-Thailand cooperation. As trade and industrial digitalization advance, artificial intelligence (AI), an essential force in the new wave of technological revolution, is increasingly embedded in the bilateral agenda, steering collaboration beyond efficiencydriven “digital coordination” toward more structured and systemic“intelligent co-development.”Building on five decades of mutual trust since the establishment of diplomatic ties, this cooperation not only addresses the practical needs of industrial upgrading and governance transformation but offers a valuable reference for ASEAN countries exploring replicable pathways in the era of digital transformation. 展开更多
关键词 intelligent co development AI digital economy technological revolution bilateral cooperation trade digitalization artificial intelligence industrial upgrading
在线阅读 下载PDF
Overview of AISE Publications in 2025
12
作者 Tingwen Huang 《Artificial Intelligence Science and Engineering》 2026年第1期I0001-I0002,共2页
The year 2025 marked the inaugural volume of Artificial Intelligence Science and Engineering(AISE).Withthe strong support of the global academic community in artificial intelligence and control science,and through the... The year 2025 marked the inaugural volume of Artificial Intelligence Science and Engineering(AISE).Withthe strong support of the global academic community in artificial intelligence and control science,and through thededicated efforts of our editorial board members,authors,and reviewers,all four issues were successfullypublished.These issues brought together significant original contributions and authoritative surveys from leadingscholars,laying a solid academic foundation for the long-term development of the journal. 展开更多
关键词 AUTHORS control scienceand artificial intelligence science engineering aise withthe academic community science engineering artificial intelligence editorial board reviewers
在线阅读 下载PDF
Automating the Initial Development of Intent-Based Task-Oriented Dialog Systems Using Large Language Models:Experiences and Challenges
13
作者 Ksenia Kharitonova David Pérez-Fernández +1 位作者 Zoraida Callejas David Griol 《Computers, Materials & Continua》 2026年第5期1021-1062,共42页
Building reliable intent-based,task-oriented dialog systems typically requires substantial manual effort:designers must derive intents,entities,responses,and control logic from raw conversational data,then iterate unt... Building reliable intent-based,task-oriented dialog systems typically requires substantial manual effort:designers must derive intents,entities,responses,and control logic from raw conversational data,then iterate until the assistant behaves consistently.This paper investigates how far large language models(LLMs)can automate this development.In this paper,we use two reference corpora,Let’s Go(English,public transport)and MEDIA(French,hotel booking),to prompt four LLM families(GPT-4o,Claude,Gemini,Mistral Small)and generate the core specifications required by the rasa platform.These include intent sets with example utterances,entity definitions with slot mappings,response templates,and basic dialog flows.To structure this process,we introduce a model-and platform-agnostic pipelinewith two phases.The first normalizes and validates LLM-generated artifacts,enforcing crossfile consistency andmaking slot usage explicit.The second uses a lightweight dialog harness that runs scripted tests and incrementally patches failure points until conversations complete reliably.Across eight projects,all models required some targeted repairs before training.After applying our pipeline,all reached≥70%task completion(many above 84%),while NLU performance ranged from mid-0.6 to 1.0 macro-F1 depending on domain breadth.These results show that,with modest guidance,current LLMs can produce workable end-to-end dialog prototypes directly fromraw transcripts.Our main contributions are:(i)a reusable bootstrap method aligned with industry domain-specific languages(DSLs),(ii)a small set of high-impact corrective patterns,and(iii)a simple but effective harness for closed-loop refinement across conversational platforms. 展开更多
关键词 Task-oriented dialog systems large language models(LLMs) RASA dialog automation natural language understanding(NLU) slot filling conversational AI human-in-the-loop NLP
在线阅读 下载PDF
AIS数据中船舶避碰行为提取方法 被引量:2
14
作者 冮龙晖 刘通 +1 位作者 王旭升 谢伟东 《舰船科学技术》 北大核心 2025年第3期141-147,共7页
船舶避碰行为分析对于船舶碰撞风险评估、智能避碰决策、导助航设备研发和船舶交通管理等方面的研究具有重要意义。本文提出一种基于海量AIS时空数据的船舶避碰行为提取方法。该方法包括会遇态势判别、避碰样本提取和避碰行为提取3个模... 船舶避碰行为分析对于船舶碰撞风险评估、智能避碰决策、导助航设备研发和船舶交通管理等方面的研究具有重要意义。本文提出一种基于海量AIS时空数据的船舶避碰行为提取方法。该方法包括会遇态势判别、避碰样本提取和避碰行为提取3个模块,依据避碰规则和航海实践对会遇态势判别和避碰样本提取中的关键参数及判别条件进行确定,通过船舶航行轨迹还原和避碰行为特征参数迭代,识别出表征避碰时机和避碰行为的具体参数。应用实际AIS数据对算法的有效性和准确性进行验证,并将算法提取结果与实际船舶航迹进行对比分析,结果表明该方法能够有效地从AIS数据中提取出船舶会遇和避碰行为数据,可以为后续船舶避碰相关研究提供数据支持。 展开更多
关键词 避碰行为分析 会遇态势 ais数据
在线阅读 下载PDF
AIS数据驱动的船舶智能避碰测试场景构建方法 被引量:1
15
作者 陈立家 刘岩植 +1 位作者 许毅 汪洋 《武汉理工大学学报(交通科学与工程版)》 2025年第1期195-202,209,共9页
本文基于数据驱动的场景构建理论,提出并改进了一种基于重要性采样的蒙特卡洛场景构建方法.基于AIS历史航迹数据构建了完整的船舶航行轨迹,并结合船舶会遇的时空特性,对真实的会遇避碰场景进行了识别.通过定义避碰测试场景要素,实现了... 本文基于数据驱动的场景构建理论,提出并改进了一种基于重要性采样的蒙特卡洛场景构建方法.基于AIS历史航迹数据构建了完整的船舶航行轨迹,并结合船舶会遇的时空特性,对真实的会遇避碰场景进行了识别.通过定义避碰测试场景要素,实现了场景要素的参数化,从而将真实的会遇避碰场景解构.通过拟合真实场景的参数概率分布,利用基于重要性采样的蒙特卡洛方法生成具备真实性的避碰测试场景.利用相对速度,相对距离等指标对不同场景下的碰撞风险进行了评估.结果表明:该方法提高了生成高风险避碰测试场景的概率,使测试过程算法的潜在问题和漏洞更容易暴露,加速了测试进程. 展开更多
关键词 ais 会遇避碰 测试场景 蒙特卡洛法 场景构建
在线阅读 下载PDF
地区产业多样化的组态路径研究——基于AIS框架的分析
16
作者 王燕武 邹乐欢 莫长炜 《科研管理》 北大核心 2025年第2期64-72,共9页
在国际贸易保护主义抬头、全球供应链断裂风险加剧以及数字技术革命加速推进的背景下,如何促进产业多样化发展以提升地区经济韧性和推动经济可持续发展已成为当前学术界和政策制定者共同关注的重要问题。本文通过整合演化经济地理理论... 在国际贸易保护主义抬头、全球供应链断裂风险加剧以及数字技术革命加速推进的背景下,如何促进产业多样化发展以提升地区经济韧性和推动经济可持续发展已成为当前学术界和政策制定者共同关注的重要问题。本文通过整合演化经济地理理论、新制度社会学、经济地理与城市经济学等相关研究构建了一个决定地区产业多样化的AIS理论框架,并以中国273个城市为样本,运用模糊集定性比较分析,识别了实现高产业多样化的组态路径。研究发现:(1)地区高产业多样化是多种前因条件协同作用的结果。其中,城市创新能力发挥着更为普遍性的作用。(2)地区高产业多样化存在多条等效实现路径。高无关多样化路径包括变革型能动性驱动路径以及自由化市场制度驱动路径;而高相关多样化路径包括双重制度干预型驱动路径、协调制度下内源性创新驱动路径以及大城市数字经济驱动路径。本研究揭示了地区产业多样化发展的组态逻辑,深化了对地区产业路径发展理论的理解,为各地区因地制宜地选择产业多样化实现路径提供了理论基础。 展开更多
关键词 产业多样化 ais框架 模糊集定性比较分析
原文传递
考虑航速变化的船舶AIS轨迹改进自适应压缩算法
17
作者 初良勇 杨子豪 +1 位作者 章嘉文 韩亚雄 《舰船科学技术》 北大核心 2025年第15期151-158,共8页
经典的DP压缩算法在AIS(Automatic Identification System)轨迹压缩时容易损失较多的船舶轨迹运动特征,考虑轨迹航速与航向的压缩算法又普遍较为复杂,为简化压缩流程,保留更多的轨迹运动特征,在DouglasPeucker算法的基础上,引入轨迹运... 经典的DP压缩算法在AIS(Automatic Identification System)轨迹压缩时容易损失较多的船舶轨迹运动特征,考虑轨迹航速与航向的压缩算法又普遍较为复杂,为简化压缩流程,保留更多的轨迹运动特征,在DouglasPeucker算法的基础上,引入轨迹运动特征点筛选步骤,提出一种考虑航速变化的船舶AIS轨迹改进自适应压缩算法,即根据船舶航速和航向的变化值自适应标记航速特征点和航向特征点,将原始轨迹由航向特征点分割再对子轨迹分别进行自适应压缩,最后整合数据得到压缩后的数据。以厦门港—天津港的船舶航行数据进行实验,从压缩率、压缩效果、压缩时间等多个方面对比DP算法、考虑航速的DP算法、自适应压缩算法、考虑航速变化的改进船舶AIS轨迹自适应压缩算法压缩的效果,结果证明该算法在保证效率的同时能够更好地保留轨迹的运动特征。 展开更多
关键词 ais轨迹 船舶轨迹压缩 轨迹特征点 ATACS算法
在线阅读 下载PDF
基于北斗与AIS位置信息融合的船载岸电监测系统设计
18
作者 金晓军 赵钊 《船电技术》 2025年第5期56-61,共6页
目前船舶岸电使用缺少岸电使用监测机制,难以对船舶岸电状态进行判断,导致海事部门监管困难。为监督船舶靠港使用岸电情况以及辅助船舶使用岸电,提出了一种基于北斗与AIS位置信息融合的船载岸电监测系统的设计思想及功能实现方案。通过... 目前船舶岸电使用缺少岸电使用监测机制,难以对船舶岸电状态进行判断,导致海事部门监管困难。为监督船舶靠港使用岸电情况以及辅助船舶使用岸电,提出了一种基于北斗与AIS位置信息融合的船载岸电监测系统的设计思想及功能实现方案。通过定位信息建立船舶泊位状态的判断机制,在此基础上实现了岸电数据采集、船岸通信、异常报警等功能的统一;可为内河船舶岸电使用监测提供新的方法,满足海事部门监管需求。 展开更多
关键词 船舶岸电 北斗定位 ais 岸电监测机制
在线阅读 下载PDF
Analysis of Ship Evacuation during Tsunami Using AIS (Automatic Identification System) Data 被引量:2
19
作者 Masao Furusho Yoshiji Yano 《Journal of Earth Science and Engineering》 2012年第7期412-417,共6页
External forces of marine weather, such as waves, currents and wind flows, affect the course and speed of a ship under way. As a result, marine accidents, such as collisions or grounding, may occur, particularly in in... External forces of marine weather, such as waves, currents and wind flows, affect the course and speed of a ship under way. As a result, marine accidents, such as collisions or grounding, may occur, particularly in inshore areas. On coasts where earthquakes and tsunamis occur frequently, such as the Japanese coast, a tsunami that advances into a bay from the open sea is influenced by the submarine topography. It grows into a huge wave that could cause tremendous damage to ships under way and at anchorage. A massive earthquake occurred in the Tohoku and Kanto regions of Japan on March 11,2011. In response, a tsunami alert, a tsunami warning and an advisory were issued for the entire Pacific coast region. This research investigates the evacuation behaviour of ships by AIS (automatic identification system) data in Tokyo Bay after the tsunami warning was issued. The unusual behaviour observed was attributed to the emergency evacuation of ships. 展开更多
关键词 Great east Japan earthquake TSUNAMI ais ship evacuation.
在线阅读 下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部