Dalian Maritime University

Context matters in just culture: Translating formal just culture into lived near-miss reporting experience in maritime transportation

In onboard environments characterised by high operational risk, near-miss reporting is an important mechanism for identifying latent risks, preventing accidents and supporting organisational improvement. However, there remains limited empirical understanding of whether the just c...

Static and dynamic seal performances of axial force self-balancing devices

:Excessive axial force poses a critical challenge to the operational stability and reliability of turbomachinery, necessitating effective axial force balancing strategies. This study proposes a comprehensive methodology for the performance-oriented design and optimization of axia...

Task-Adaptive Reinforcement Learning for Unified OCR in Maritime and Complex Documents

Maritime logistics relies on documents that combine dense multilingual text, irregular layouts, and task-specific output schemas, requiring operational systems to recover text, structure, location, and semantics. We trained Hi-Dolphin-OCRusing a task-adaptive reinforcement-learni...

FRA-YOLO: Frequency-guided receptive-field adaptation for occluded ship detection in complex nearshore backgrounds

Detecting ships in complex nearshore scenes is difficult because occlusion, dense interactions, small apparent scale, and structured background textures cause missed detections, false alarms, and inaccurate localization. We propose FRA-YOLO, a compact YOLO11n-based detector that...

Container Port Efficiency and Productivity in 2019 and 2020: A Directional Distance Function Incorporating Vessel Waiting Time

This study examines change in operational efficiency and productivity across a balanced panel of 15 container ports for the years 2019 and 2020. Berth length, gantry cranes, and other cranes are inputs; high container throughput is desirable, and extended anchorage waiting time i...

A Hybrid Quantum Optimization Framework for Oil Spill Detection Using Marine Radar

Oil spills at sea pose a serious threat to marine ecosystems and coastal economic development. Therefore, rapid and accurate detection of oil spills is crucial for emergency response and environmental protection. Marine radar offers unique advantages in short-range, continuous, a...

Experimental investigation of wake and load modifications of a submerged horizontal cylinder by a wrap-around flexible appendage under wave–current conditions

The hydrodynamic effects of a wrap-around flexible appendage attached to a submerged horizontal cylinder were experimentally investigated under current, wave, and wave-current conditions using synchronized force measurements, particle image velocimetry, and image-based motion tra...

Corrosion Behavior of Two Gd Particle-Doped Fe-Based Amorphous Coatings with Excellent Neutron Absorption Performance

Safe long-term storage of spent nuclear fuel requires materials that combine high neutron absorption with excellent corrosion resistance. In this study, two Gd-doped Fe-based amorphous coatings (2X5 + Gd and PC + Gd) containing 6.0 wt.% Gd were fabricated by high-velocity air–fue...

Resilient train formation control for ASVs under intermittent communication environment via actor–critic reinforcement learning

To address the train formation task of autonomous surface vehicles (ASVs) operating under intermittent communication environment, this paper investigates the problem of resilient formation robust control for ASVs. First, a resilient distributed leader predictor (RDLP) is designed...

Study on the pilot fuel injection strategy for a large-scale diesel/methanol dual-direct injection engine at high methanol substitution ratio

The diesel/methanol dual-direct injection (DMDDI) engine attracts wide attention because of its high methanol substitution ratio (MSR). This study establishes and validates a 3D CFD model for a 6400 kW two-stroke diesel/methanol dual-fuel (DMDF) engine. Under a fixed direct-injec...

Identification of key risk ships for MASS collision avoidance in mixed traffic through axiomatic fuzzy set-based semantic clustering

In mixed traffic involving conventional ships and Maritime Autonomous Surface Ships (MASS), autonomous collision avoidance requires attention not only to ships presenting high collision risks, but also to those that may conflict with the own ship and whose unstable motion may sig...

Supply Chain Vertical Shareholding and Corporate ESG Performance: Evidence from China

Using data from Chinese listed firms from 2009 to 2023, this study empirically examines the intensity impact of vertical shareholding among business partners within supply chains on corporate ESG performance, based on a final sample of 349 observations from 134 firms. We discover...

Evolutionary game analysis of cooperative technology upgrading in EV battery reverse supply chains

Achieving efficient recycling of end-of-life electric vehicle (EV) batteries requires both technology and strategic coordination among stakeholders. This study examines cooperative technological upgrading in EV battery recycling using evolutionary game theory. A bilateral model i...

Parametric study of injection strategy and two injector layouts for a large low-speed marine HPDI methanol engine

Methanol, as a promising green alternative fuel in marine engines, suffers from the challenge of balancing thermal efficiency and NOx emissions when applied to large low-speed marine high pressure direct injection (HPDI) engines. This study aims to investigate the influence of in...

A Decoupled Global-Local Planning Framework for COLREGs-Aware Maritime Autonomous Surface Ships in Coastal Waters

Autonomous navigation of Maritime Autonomous Surface Ships (MASS) in complex coastal waters requires reliable global path generation and stable local collision avoidance. Existing planners often couple path search, path smoothing, and collision-avoidance reactions, increasing glo...

A Dynamic and Recursive Process of Resilience in Chinese Families of Children with Autism Spectrum Disorder: A Qualitative Study

Objective: This study examines how Chinese families of children with autism spectrum disorder (ASD) developed family resilience across their caregiving experiences and identifies the conditions that shape these processes. Methods: In-depth retrospective interviews were conducted...

CDF-Net: Cross-Scale Direction-Aware Focusing Network for Robust SAR Ship Detection with Horizontal Bounding Boxes

Ship detection with horizontal bounding box in synthetic aperture radar (SAR) images remains challenging due to multi-scale imbalance, arbitrary ship orientations, severe sea clutter, and high false alarm rates in dense inshore scenes. We propose a Cross-scale Direction-aware Foc...

Regime shifts in shallow lakes: Modeling nonlinear feedbacks in submerged macrophyte-epiphyte-snail system

A three-dimensional dynamical model is formulated to investigate the interactions among submerged macrophytes, epiphytes, and snails in shallow lake ecosystems. The model incorporates key processes such as shading effect, selective grazing behavior, and nonlinear predation pressu...

On the implementation of the provisions concerning area-based management tools under the BBNJ Agreement

Abstract As one of the four core components of the Agreement under the United Nations Convention on the Law of the Sea on the Conservation and Sustainable Use of Marine Biological Diversity of Areas Beyond National Jurisdiction (BBNJ Agreement), area-based management tools (ABMTs...

Multimodel fuzzy predictor-based distributed game-theoretic formation control of underactuated autonomous surface vehicles

This paper investigates a distributed game-theoretic formation control problem for underactuated autonomous surface vehicles (ASVs) with potentially conflicting individual objectives. A distributed game-theoretic formation control framework is developed, in which formation coordi...