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Wyświetlanie 1-15 z 21
Tytuł:
A Clustering Analysis for Identifying Areas of Collision Risk in Restricted Waters
Autorzy:
Xiang, Z.
Hu, Q.
Shi, C.
Powiązania:
https://bibliotekanauki.pl/articles/116062.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
anticollision
restricted waters
ship domain
Opis:
The identification of areas of collision risk in restricted waters could play an important role in VTS services. Based on the concept of ship domain, this paper introduces a model for identifying collision risk between vessels in restricted waters, then puts forward an improved DBSCAN clustering algorithm for identifying areas of high collision risk, finally, the visualization algorithm is presented. The experimental results in this paper show the algorithm is capable of identifying and rendering areas of collision risk in restricted waters.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 1; 101-105
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Simulative Comparison of Ship Domains and Their Polygonal Approximations
Autorzy:
Szłapczyński, R.
Szłapczyńska, J.
Powiązania:
https://bibliotekanauki.pl/articles/116310.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
safety at sea
Ship Domain
Collision Avoidance
COLREGs
ECDIS
Simulative Comparison
Fuzzy Domain
Simulation Experiment
Opis:
The paper investigates the impact of a precise ship domain shape on the size of collision avoidance manoeuvres. The considered collision avoidance manoeuvres include both course and speed alterations. Various ship domains are compared with their polygonal approximations, which vary in the number of points of a domain contour and placement of these points. The best of all considered approximations is determined in the course of simulation experiments performed for head-on, crossing and overtaking situations. The chosen number and placement of contour points combine precision of domain approximation with reasonable computational time.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 1; 135-141
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Research on Concept of Ship Safety Domain
Autorzy:
Baran, A.
Fişkin, R.
Kişi, H.
Powiązania:
https://bibliotekanauki.pl/articles/117480.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
safety at sea
ship safety domain
ship domain
Dalian Maritime University (DMU)
Maritime University of Szczecin
bibliometric statistics
safety zone
safe navigation
Opis:
This study presents the results of the content analysis of articles related to "Ship Safety Do-main". The content and statistical analysis of 44 articles that published in 21 different journals between 1970 and 2016 were conducted. This study includes various data types such as publishing years of articles, obtaining the type of data, the contribution of authors, the contribution of countries, the contribution of the institution, the rank of the journal, keywords of articles and etc. The content analysis aims to provide necessary indicators for readers, followers, and contributors of relevant discipline and a glimpse of lots of articles. The published articles about ship safety domain are discovered by this study so as to contribute lecturers and researchers interested in navigation especially ship domain concept. The results of the research were revealed that Poland and China are the most contributing countries, Dalian Maritime University and The Maritime University of Szczecin are the most contributing institutions and Ning Wang and Rafal Szlapczynski are the most contributing researchers.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 1; 43-47
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ship domain model for multi-ship collision avoidance decision-making with COLREGs based on artificial potential field
Autorzy:
Wang, T.F.
Yan, X.P.
Wang, Y.
Wu, Q.
Powiązania:
https://bibliotekanauki.pl/articles/116475.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
ship domain
ship domain model
collision avoidance
colregs
Artificial Potential Field (AFP)
decision-making
Predicted Area of Danger (PAD)
Closest Point of Approach (CPA)
Opis:
A multi-ship collision avoidance decision-making and path planning formulation is studied in a distributed way. This paper proposes a complete set of solutions for multi-ship collision avoidance in intelligent navigation, by using a top-to-bottom organization to structure the system. The system is designed with two layers: the collision avoidance decision-making and the path planning. Under the general requirements of the International Regulations for Preventing Collisions at Sea (COLREGs), the performance of distributed path planning decision-making for anti-collision is analyzed for both give-way and stand-on ships situations, including the emergency actions taken by the stand-on ship in case of the give-way ship’s fault of collision avoidance measures. The Artificial Potential Field method(APF) is used for the path planning in details. The developed APF method combined with the model of ship domain takes the target ships’ speed and course in-to account, so that it can judge the moving characteristics of obstacles more accurately. Simulation results indicate that the system proposed can work effectiveness.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 1; 85-92
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An experimental identification of multipath effect in GPS positioning error
Autorzy:
Rumora, I.
Sikirica, N.
Filjar, R.
Powiązania:
https://bibliotekanauki.pl/articles/116056.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Pseudo Random Noise (PRN)
accuracy
GPS positioning errors
multipath effect
Base-band Processing Domain (BPD)
Navigation Processing Domain
Global Positioning System (GPS)
Global Navigation Satellite System (GNSS)
Opis:
The analysis of the GPS multipath effects in maritime environment is constrained with the practice of traditional GPS receiver design, that prevents access to GPS signals in Base-band Processing Domain. Here we propose and validate a simple method for experimental identification of multipath effect in Navigation Processing Domain, based on spectral characterisation of time series of GPS positioning errors.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 1; 29-32
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Learning to Swim - How Operational Design Parameters Determine the Grade of Autonomy of Ships
Autorzy:
Uge, C.
Hochgeschurz, S.
Powiązania:
https://bibliotekanauki.pl/articles/2063966.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Operational Design Domain
autonomous vessels
authonomy of ships
autonomous shipping
grade of authonomy
level of authonomy
BZERO project
Opis:
In recent years, ideas and applications for autonomous shipping have been rapidly increasing. In most of today’s ship bridge systems decision support systems with different capabilities are installed and officers of the watch rely on them. First tests with fully and constrained autonomous ships are on the way. One of them is the B0 | BZERO project, with the aim of an autonomous 8-hour watch-free bridge, while the ship is still manned. The system’s constraints are captured in the operational design domain (ODD) defining all conditions under which the autonomous system can operate safely. We propose the definition of a preliminary ODD considering both regulatory and technical restrictions. Furthermore, we present a new way of defining the level of autonomy of a ship by using the ODD and navigational specifications.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2021, 15, 3; 501--509
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Game Strategies of Ship in the Collision Situations
Autorzy:
Lisowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/117558.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
game theory
Game Ship Control (GSC)
Collision Situation
MATLAB
Safe Ship Trajectory
Simulation Research
Neural Ship’s Domain
Algorithm
Opis:
The paper introduced the basic model of process of safe ship control in a collision situation using a game model with j objects, which includes non-linear state equations and non-linear, time varying constraints of the state variables as well as the quality game control index in the forms of the game integral payment and the final payment. Approximated model of the process control as the model of multi-step matrix game in the form of dual linear programming problem has been adopted here. The Game Ship Control GSC computer program has been designed in the Matlab/Simulink software in order to determine the own ship’s safe trajectory. These considerations have been illustrated with examples of a computer simulation using an GSC program for determining the safe ship's trajectory in real navigational situation. Simulation research were passed for five sets of strategies of the own ship and met ships.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8, 1; 69-77
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of the 1-2-3 Rule for Calculations of a Vessel’s Route Using Evolutionary Algorithms
Autorzy:
Wiśniewski, B.
Medyna, P.
Chomski, J.
Powiązania:
https://bibliotekanauki.pl/articles/116117.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
tropical cyclones avoidance
Fuzzy Domain
Weather Navigation
Tropical Cyclones
1-2-3 Rule
vessels route
evolutionary algorithms
route planning
Opis:
An example is shown of the 1-2-3 rule application for calculations to determine a route avoiding tropical cyclones. The dynamic programming used is based on regularly received weather reports containing present and forecast data on tropical cyclones. The results were compared with the post factum calculated route which utilized only weather analyses concerning the relevant moments of the voyage and with routes calculated using the cyclone fuzzy domain as an area dangerous to navigation. The calculations were made in the evolutionary algorithms environment.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 2; 143-146
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling the processes of taking over the watch from an autonomous navigation system
Autorzy:
Hochgeschurz, S.
Dalinger, E.
Motz, F.
Powiązania:
https://bibliotekanauki.pl/articles/1841558.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
autonomous vessels
autonomous navigation system
navigation system
human machine interface
operational design domain
taking over the watch
officer of the watch
AutoOOW
Opis:
The maritime industry is striving towards increasing levels of autonomy within the field of navigation. However, fully autonomous vessel navigation requires an extraordinarily complex system. As a step towards full autonomy and to reduce system complexity, nautical officers should still be available on board to take over the watch from the autonomous system in situations, in which human intervention is required. Therefore, a highly advanced human-machine interface (HMI) is essential, which supports nautical officers in retrieving all necessary information in order to manage the takeover. The implementation of the autonomous system and introduction of an HMI creates new processes, which need to be defined. In this paper, we portray our approach to define the processes for watch handovers from the autonomous system to nautical officers by investigating current watch handover processes. Subsequently, the resulting process models are described and discussed.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2021, 15, 1; 117-126
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Situation Awareness for Navigation Safety Control
Autorzy:
Smirnova, O.V.
Powiązania:
https://bibliotekanauki.pl/articles/117509.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
situation awareness
navigation safety control
safety at sea
decision-making process
navigation safety domain
decision-making support system
Decision Support System (DSS)
Opis:
Situation awareness is the key element of the decision-making process. In navigation safety domain, monitoring, control, assessment of dangerous situations, support of operators of decision-making support system should be implemented in real time. In this paper we present the problem of situation awareness applied to navigation safety control. The paper considers existing models of situation awareness and ontology-based approach for maritime situation awareness. We introduce the situation concept using infons. Finally, we give an example how use these methods for design and creation of decision-support system for navigation safety control.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 2; 383-388
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling of Ship Collision Risk Index Based on Complex Plane and Its Realization
Autorzy:
Xu, X.
Geng, X.
Wen, Y.
Powiązania:
https://bibliotekanauki.pl/articles/116223.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
risk
risk calculation
ship collision risk index
risk index
ships domain
Decision Support System (DSS)
modeling of ship collision risk index
ARPA
Opis:
Ship collision risk index is the basic and important concept in the domain of ship collision avoidance. In this paper, the advantages and deficiencies of the various calculation methods of ship collision risk index are pointed out. Then the ship collision risk model based on complex plane, which can well make up for the deficiencies of the widely-used evaluation model proposed by Kearon.J and Liu ruru is proposed. On this basis, the calculation method of collision risk index under the encountering situation of multi-ships is constructed, then the three-dimensional image and spatial curve of the risk index are figured out. Finally, single chip microcomputer is used to realize the model. And attaching this single chip microcomputer to ARPA is helpful to the decision-making of the marine navigators.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2016, 10, 2; 251-256
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ship domain as a safety criterion in a precautionary area of traffic separation scheme
Autorzy:
Pietrzykowski, Z.
Magaj, J.
Powiązania:
https://bibliotekanauki.pl/articles/116705.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
ship domain
Closest Point of Approach (CPA)
Traffic Separation Schemes (TSS)
navigational safety assessment
precautionary area
safety criterion
safety at sea
colregs
Opis:
The ship domain is one of the criteria for navigational safety assessment. It is particularly important in restricted areas with high intensity traffic, where the criteria of closest point of approach (CPA) and time to CPA are difficult to apply. This research continues to examine ship domains in Traffic Separation Schemes (TSS). We have analyzed precautionary areas established within TSSs in connection with changed arrangements of vessel traffic. Besides, we have defined ship domains in a precautionary area of a specific TSS, and compared them to domains of vessels proceeding along traffic lanes.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 1; 93-98
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of ship neural domain shape on safe and optimal trajectory
Autorzy:
Lisowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/24201475.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
artificial neural network model
method for optimization
dynamic programming method
ship safety domain
safe ship control
path planning
multi-object decision model
computer simulation
Opis:
This article presents the task of safely guiding a ship, taking into account the movement of many other marine units. An optimally neural modified algorithm for determining a safe trajectory is presented. The possible shapes of the domains assigned to other ships as traffic restrictions for the particular ship were subjected to a detailed analysis. The codes for the computer program Neuro-Constraints for generating these domains are presented. The results of the simulation tests of the algorithm for a navigational situation are presented. The safe trajectories of the ship were compared at different distances, changing the sailing conditions and ship sizes.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 1; 185--191
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Safety of Shipping when Navigating on the PS Class Container Vessel “Emma Maersk” While Approaching DCT Terminal in Gdańsk Port Północny
Autorzy:
Rutkowski, G.
Powiązania:
https://bibliotekanauki.pl/articles/116571.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
port operations
port of Gdansk
container vessel
Deepwater Container Terminal (DCT) in Gdansk
navigational risk
safety at sea
safety of shipping
ship’s domain
Opis:
In this paper author presents the methods that can be used for estimating the safety of shipping (navigational risk) in the restricted sea areas of the Gulf of Gdansk by means of a three-dimensional model of ship’s domain specified for the PS Class container vessels “Emma Maersk”. The essence of the method suggested in the thesis is the systematic approach to a sea vessel operation in the aspect of estimating its safety while approaching DCT terminal in Gdańsk Port Północny in the divergent exterior conditions.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2016, 10, 3; 481-488
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intelligent autonomous ship navigation using multi-sensor modalities
Autorzy:
Wright, R.G.
Powiązania:
https://bibliotekanauki.pl/articles/117337.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
maritime autonomous surface ships (MASS)
artificial intelligence (AI)
intelligent autonomous ship navigation
autonomous ship
autonomous ships navigation
multiSensor modalities
unmanned ship
maritime domain awareness (MDA)
Opis:
This paper explores the use of machine learning and deep learning artificial intelligence (AI) techniques as a means to integrate multiple sensor modalities into a cohesive approach to navigation for autonomous ships. Considered is the case of a fully autonomous ship capable of making decisions and determining actions by itself without active supervision on the part of onboard crew or remote human operators. These techniques, when combined with advanced sensor capabilities, have been touted as a means to overcome existing technical and human limitations as unmanned and autonomous ships become operational presently and in upcoming years. Promises of the extraordinary capabilities of these technologies that may even exceed those of crewmembers for decision making under comparable conditions must be tempered with realistic expectations as to their ultimate technical potential, their use in the maritime domain, vulnerabilities that may preclude their safe operation; and methods for development, integration and test. The results of research performed by the author in specific applications of machine learning and AI to shipping are presented citing key factors that must be achieved for certification of these technologies as being suitable for their intended purpose. Recommendations are made for strategies to surmount present limitations in the development, evaluation and deployment of intelligent maritime systems that may accommodate future technological advances. Lessons learned that may be applied to improve safety of navigation for conventional shipping are also provided.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 3; 503-510
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 21

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