Results 1 to 10 of about 20,230 (109)

Critical Collision Risk Index Based on the Field Theory

Journal of Marine Science and Engineering, 2022
Collision-risk measurements are crucial for ships, as they are necessary for collision avoidance decision making. However, collision risks between ships have not been quantified in unified standards.
Wenyao Ma, Hongbo Wang, Shengyin Wang
doaj   +3 more sources

Collision Risk Index Calculation Based on an Improved Ship Domain Model

Journal of Marine Science and Engineering, 2022
The traditional ship collision risk index model based on the distance at the closest point of approach (DCPA) and the time to the closest point of approach (TCPA) is insufficient for estimating ship collision risk and planning collision avoidance ...
Weifeng Li, Lufeng Zhong, Yang Xu, Guoyou Shi   +3 more
doaj   +3 more sources

Multi-Ship Collision Avoidance Decision-Making Based on Collision Risk Index

Journal of Marine Science and Engineering, 2020
Most maritime accidents are caused by human errors or failures. Providing early warning and decision support to the officer on watch (OOW) is one of the primary issues to reduce such errors and failures. In this paper, a quantitative real-time multi-ship
Yingjun Hu, Anmin Zhang, Wuliu Tian, Jinfen Zhang, Zebei Hou   +4 more
doaj   +3 more sources

Navigation safety domain and collision risk index for decision support of collision avoidance of USVs

International Journal of Naval Architecture and Ocean Engineering, 2021
This paper proposes a decision support model for USVs to improve the accuracy of collision avoidance decision-making. It is formed by Navigation Safety Domain (NSD) and domain-based Collision Risk Index (CRI), capable of determining the collision stage ...
Jian Zhou, Feng Ding, Jiaxuan Yang, Zhengqiang Pei, Chenxu Wang, Anmin Zhang   +5 more
doaj   +3 more sources

Estimation of vessel collision risk index based on support vector machine

Advances in Mechanical Engineering, 2016
Collision risk index is important for assessing vessel collision risk and is one of the key problems in the research field of vessel collision avoidance.
Longhui Gang, Yonghui Wang, Yao Sun, Liping Zhou, Mingheng Zhang   +4 more
doaj   +2 more sources

A Path Planning Method for Intelligent Ships Based on the Improved Artificial Potential Field Algorithm [PDF]

Sensors
Path planning for unmanned ships has become an important research topic in recent years. To enhance navigation safety and reduce collision risk, this study proposes an improved artificial potential field (IAPF) method.
Xiao Liu, Hua Deng, Xingya Zhao, Kexin Xu, Deqing Yu   +4 more
doaj   +2 more sources

A context-calibrated framework based on uncrewed aerial vehicle imagery for power-line detectability and mitigation evaluation: a model system from Black-necked Crane wintering grounds on the Tibetan Plateau [PDF]

PeerJ
Overhead power lines are a major source of avian mortality, yet quantitative and context-calibrated assessments of wire detectability and marker performance under variable field conditions remain scarce.
Xintong Li, Yumin Guo
doaj   +3 more sources

Modeling collision risk for unsafe lane-changing behavior: A lane-changing risk index approach

Alexandria Engineering Journal
The lane-changing maneuvers are challenging and contributes to traffic accidents and crashes. They are complicated task that often lead to an increased risk of vehicle collisions and deteriorates traffic flow. This paper proposes a vehicle collision risk
Muhammad Sameer Sheikh, Yinqiao Peng
doaj   +3 more sources

Comparison of Collision Avoidance Algorithms for Unmanned Surface Vehicle Through Free-Running Test: Collision Risk Index, Artificial Potential Field, and Safety Zone

Journal of Marine Science and Engineering
This paper details the development of a collision avoidance algorithm for unmanned surface vehicles (USVs) and its validation using free-running tests. The USV, designed as a catamaran, incorporates a variety of sensors for its guidance, navigation, and ...
Jung-Hyeon Kim, Hyun-Jae Jo, Su-Rim Kim, Si-Woong Choi, Jong-Yong Park, Nakwan Kim   +5 more
doaj   +3 more sources

MULTI-VESSELS COLLISION AVOIDANCE STRATEGY FOR AUTONOMOUS SURFACE VEHICLES BASED ON GENETIC ALGORITHM IN CONGESTED PORT ENVIRONMENT

Brodogradnja, 2022
An improved genetic collision avoidance algorithm is proposed in this study to address the problem that Autonomous Surface Vehicles (ASV) need to comply with the collision avoidance rules at sea in congested sea areas.
Gongxing Wu, Yuchao Li, Chunmeng Jiang, Chao Wang, Jiamin Guo, Rui Cheng   +5 more
doaj   +1 more source