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Wyświetlanie 1-24 z 24
Tytuł:
Detection and quantification of self- similarity in data traffic for prediction of performance of marine data file transfer
Autorzy:
Konorski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1920405.pdf
Data publikacji:
1999
Wydawca:
Instytut Morski w Gdańsku
Tematy:
marine data
data traffic
Opis:
The time-sensitivity of large marine data files over a communication network necessitates accurate simulative prediction of the file transfer performance. Careful data traffic modelling is required to fit the actual traffic characteristics for subsequent generation of synthetic traffic traces and feeding them into a simulation model. Classical models have recently proved inadequate due to the discovery of self-similarity (fractal behaviour) in data traffic. This paper attempts to systematise the mathematical background of self-similarity and the ways it manifests itself in stochastic processes modelling data traffic. Relevance of self-similarity to traffic description and measurements is discussed. Results of a research effort at the Department of Marine Electronics of the Maritime Institute in Gdansk are described, which focus on the development of a software tool for detection and quantification of self- similarity in observed or synthetically generated data traffic.
Źródło:
Biuletyn Instytutu Morskiego w Gdańsku; 1999, 26, 2; 29-48
1230-7424
2450-5536
Pojawia się w:
Biuletyn Instytutu Morskiego w Gdańsku
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Visualization investigation on the marine data with multivariate statistical analysis methods
Autorzy:
Li, Y.
Lu, Z.
Wang, M.
Powiązania:
https://bibliotekanauki.pl/articles/260477.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
marine data
factor analysis
cluster analysis
discriminate analysis
visualization
Opis:
Marine information is an important way for us to know and study more about the ocean. Marine data makes the basic of marine information. Because of the huge quantity and diversity of marine data, and at the same time marine data is polyatomic variable, we start with statistical analysis methods to search for the regularity of the marine data. On one hand, we get the aggregate variation functions of the marine data by factor analyzing in aspect of the spatiality. Then we visually describe the marine status of the studied sea area with pre variogram function and post variogram function. On the other hand, we used cluster analysis method to get the verifying rule in time and make visible graphs of the marine data. In this way, we can also supply with the suggestions in classifying the sea seawater quality. The data processing result shows that the suggested methods in this article are both operable and effective. At the same time some reasonable suggestions are given in the article.
Źródło:
Polish Maritime Research; 2017, S 2; 89-94
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Integrated Data as backbone of e-Navigation
Autorzy:
Bergmann, M.
Powiązania:
https://bibliotekanauki.pl/articles/116157.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
e-Navigation
Integrated Data
ECDIS, Common Maritime Data Structure (CMDS)
IHO S-100
Universal Marine Data Model
geographic information system (GIS)
Data Integration Framework
Opis:
e-Navigation, a theme introduced but IMO to improve safety of navigation at sea, is starting to gain traction in various organizations. As the concept develops, the importance of data, both static as well as dynamic, is more and more realized. IALA and IHO, in their efforts to help making e-Navigation a reality, have agreed to propose the IHO GI Register (often known as S-100 Register) as the conceptual basis for the Common Maritime Data Structure (CMDS). Utilizing this common understanding of key players in e-Navigation arena, the IMO e-Navigation Correspondence Group has firmed up the overarching architecture, enabling a series to test beds proving the concept of integration of various data streams to enable improved communication between the stakeholders on shore or at sea. The integration of pre-composed, expert generated navigational data with real time and semi real-time data like Virtual AtoNs, Tide Gages Data or MSI transmission from VTS into a single e-Navigation display, if correctly developed, implemented and executed, will be the enabler of increased situational awareness.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 3; 371-374
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Timestamp Discrepancies in Multisensor NMEA Environment during Survey Voyage
Autorzy:
Banyś, P.
Engler, E.
Heymann, F.
Noack, T.
Powiązania:
https://bibliotekanauki.pl/articles/359803.pdf
Data publikacji:
2013
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
marine electronic devices
information
reliability of data
navigational data
survey voyage
Opis:
The standard for interfacing marine electronic devices (NMEA – National Marine Electronics Association), does not provide unambiguous information regarding the reliability of data and its timing. In this paper, time delays in navigational data are investigated. For this purpose AIS and navigational data collected offshore and onshore are used. The investigations are concentrated on lags among various NMEA sentences recorded in a relational database during the survey voyage. The analysis is based on standard elements of descriptive statistics.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 36 (108) z. 1; 22-26
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Marine parameters from radar satellite data
Autorzy:
Lehner, S.
Schulz-Stellenfleth, J.
Horstmann, J.
Powiązania:
https://bibliotekanauki.pl/articles/241032.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:
marine parameters
radar satellite data
oceanographic data
wind
ocean wave fields
Opis:
In 2001 the European Space Agency ESA will launch the earth observation satellite ENVISAT. It will carry several instruments that provide new opportunities to measure oceanographic variabIes. These are the Advanced Synthetic Aperture Radar (ASAR), the Radar Altimeter (RA), the Medium Resolution Imaging Spectrometer (MERIS) and the Advanced Along-Track Scanning Radiometer (AATSR). Together, they rep-resent the main measurement techniques of satellite oceanography, and complement each other perfectly. These instruments are to be used in synergy to: ź improve the analysis of measured wind and ocean wave fields, and thereby improve weather forecasting at weather centers; ź determine the extent and variables of sea ice and develop a five-day sea ice prediction model, to support maritime shipping and offshore activities; ź monitor map sediment and suspended matter transport in coastal regions, especially in areas with large river estuaries, which greatly affects shipping lanes, harbours, and dredging activities; ź monitor hydrobiological and bio-geochemical variables related to water quality in coastal regions and large inland waters, which affects ecology, coastal development, aquaculture, drinking water supplies, and tourism. To prepare the oceanographic community to make best use of the ENVISAT sensors in the pre-Iaunch phase, existing algorithms to derive marine parameters are used and validated using data from the ERS SAR, the ERS RA, Sea WiFS, and IRS MOS sensors now in operation. Derived products, which include wind field, sea state, sea level, sea surface temperature and concentrations of water constituents, are used to address problems that can be tackled best using the synergy of radar and optical data, such as the effect of surface slicks on radar wind measurements, sea state on ocean color, wind and waves on the resuspension of suspended matter, and wind and waves on sea ice variabIes.
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2001, 48, 2; 17-29
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research and application of rule updating mining algorithm for marine water quality monitoring data
Autorzy:
Sun, Q
Zhang, J.
Xu, X
Powiązania:
https://bibliotekanauki.pl/articles/258822.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
marine water quality monitoring
database updating
data mining
rule updating
Opis:
This paper studies the characteristics of marine water quality monitoring data monitored by photoelectric sensor network, mines the potential information from the massive data. on account of the continuous accumulation of monitoring data, this paper focuses on the study of database with numerical attribute and proposes a rule updating algorithm for solving the rule maintenance issues caused by changes in the database. according to the rule, the algorithm forms a new database from part of the original data and the new data, and searches the new database by random search, thus can avoid creating a large number of redundant rules and can quickly mine effective rules at the same time. experimental results show that this method not only can avoid mining in the whole original massive data, but also can improve work efficiency, and can quickly and effectively find new data and find useful rules in the data with high practicability.
Źródło:
Polish Maritime Research; 2018, S 3; 136-140
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ice Conditions and Human Factors in Marine Accidents at the Arctic
Autorzy:
Marchenko, N.
Powiązania:
https://bibliotekanauki.pl/articles/117217.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Ice Conditions
Human Factor
Arctic Navigation
Marine Accidents
Hydrometeorological Aspect
Accident Data Base
Accident
Marine Accidents Classification
Opis:
All activities in the Arctic are conducted near the limit of technological opportunities and human abilities. But the drain of resources in the areas convenient for development obliges us to look at this severe polar region. The main objectives of the PetroArctic project (offshore and coastal technology for petroleum production and transport from arctic water) as a part of PETROMAX and MarSafe project (Marine Safety Management) are to obtain and provide information for safety of Arctic operation such as hydrocarbons production and transport from Polar seas. One of the tasks is a collection of ice pilot experiences from the people involved in the Arctic activities to learn how they felt in these conditions, how they solved difficult tasks and managed the ice. Items of special interest are connected to lost vessels and other marine accidents. Appreciable amount of written documentation and interviews have been processed and organized into a data base of marine accidents in Russian Arctic since 1900. It includes a set of maps where the locations of the accidents are shown with a description of the accidents (date, geographical environment, vessel type, what happened and how the people acted, etc). This paper includes the map for Kara Sea and descriptions of several accidents in the eastern part of Arctic as example of different situations, as well as the principles of the data base construction and accidents classification.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 4; 409-414
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Data visualization of marine objects on digital maps
Wizualizacja danych o obiektach morskich na mapach cyfrowych
Autorzy:
Czaplewski, B.
Cwalina, K.
Kaczmarek, S.
Katulski, R.
Powiązania:
https://bibliotekanauki.pl/articles/221987.pdf
Data publikacji:
2015
Wydawca:
Akademia Marynarki Wojennej. Wydział Dowodzenia i Operacji Morskich
Tematy:
data visualization
marine objects
digital maps
wizualizacja danych
obiekty morskie
mapy cyfrowe
Opis:
The paper presents the implementation of two multithreaded applications for data visualization of marine objects written in C#, designed to run on operator consoles with 32-bit or 64-bit Windows 7 OS. The article describes the most important functionality and features of the developed C# .NET user controls for data visualization on digital maps and in the configurable tables.
W artykule przedstawiono realizację dwóch wielowątkowych aplikacji wizualizacji danych o obiektach morskich napisanych w języku C# przeznaczonych do uruchamiania w 32-bitowym systemie operacyjnym Windows 7 lub nowszym na konsolach operatorskich. Opisano najistotniejsze funkcjonalności oraz cechy opracowanych kontrolek do wizualizacji danych o obiektach morskich na mapach cyfrowych oraz w postaci konfigurowalnych tabel.
Źródło:
Zeszyty Naukowe Akademii Marynarki Wojennej; 2015, R. 56 nr 3 (202), 3 (202); 5-13
0860-889X
Pojawia się w:
Zeszyty Naukowe Akademii Marynarki Wojennej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Study of Marine Incidents Databases in the Baltic Sea Region
Autorzy:
Mullai, A.
Larsson, E.
Norrman, A.
Powiązania:
https://bibliotekanauki.pl/articles/117484.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
anticollision
Marine Incidents
Data Base
Marine Incidents Databases
Baltic Sea
Risk Analysis
Baltic Sea Region (BSR)
Helsinki Commission (HELCOM)
Opis:
A comprehensive risk analysis makes use of different datasets. Marine incidents data are essentially important datasets. The purpose of this study is to analyse marine incident databases in the BSR (Baltic Sea Region). The marine incident data in the region are inhabited by a wide rage of issues, such as limited data accessibility and availability, and the diversity in data quality, structure, amount, accuracy, degree of detail and languages. Preparing for the data analysis is a very cumbersome, labour intensive, time consuming and expensive process. Merging different datasets from different countries into a single dataset is a very difficult process, if not impossible for a complete data merging. The paper provides experiences on how to overcome some of these issues and proposes some suggestions for improvements in the future.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 3; 321-326
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Procedure for Marine Traffic Simulation with AIS Data
Autorzy:
Miyake, R.
Fukuto, J.
Hasegawa, K.
Powiązania:
https://bibliotekanauki.pl/articles/117537.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
AIS Data
Marine Traffic
Marine Traffic Simulation
Collision Avoidance
Automatic Identification System (AIS)
safety at sea
Traffic Simulation
Navigation Environment
Opis:
It is essential to evaluate safety of marine traffic for the improvement of efficiency and safety of marine traffic. Spread of AIS makes observation of actual marine traffic more easily and faster than before. Besides, description of collision avoidance behaviours of ships are indispensable to simulate a realistic marine traffic. It is important to develop and implement an algorithm of collision avoidance corresponding to a target traffic or target area into the marine traffic simulation because actual actions for collision avoidance depend on circumstances where ships are sailing. The authors developed an automated marine traffic simulation system with AIS data. And in this paper, we proposed a series of systematic procedures for marine traffic simulation including analysing for collision avoidance behaviours using AIS data.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 1; 59-66
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of near-collisions in the Tagus River Estuary using a marine traffic simulation model
Autorzy:
Rong, H.
Teixeira, A.
Soares, C. G.
Powiązania:
https://bibliotekanauki.pl/articles/135293.pdf
Data publikacji:
2015
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
near-collisions
ship domain
marine traffic simulation
artificial potential field
AIS data
maritime safety
Opis:
This paper evaluates near ship-ship collision situations in the Tagus River Estuary using a simulation model of ship navigation in restricted waters. The simulation model consists of a ship collision avoidance model based on the Artificial Potential Field (APF) method, which has been improved to account for the lateral distribution of traffic along the route, the ship type and length and speed development of the ships along the trajectory. AIS data of ships entering and leaving the port of Lisbon are analysed to obtain the main characteristics of traffic parameters used as input for the traffic simulation model, such as: the routes of the vessels, speed distribution along the routes, traffic density and characteristics of the ships in each route, among others. First, the improved model of ship navigation and the Monte Carlo simulation technique are used to simulate the marine traffic in the Tagus River Estuary. Then, the concept of “ship domain” is used as collision criterion to determine the number of near collisions and the locations where they are most likely to occur. Finally, the simulation results are compared to the ones obtained from raw AIS data to assess the capability of the simulation model for marine traffic risk analysis.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2015, 43 (115); 68-78
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Concept of the integrated maritime data environment as a framework for European integrated and comprehensive shipping monitoring data exchange system
Autorzy:
Miler, R. K.
Bujak, A.
Orzeł, A.
Powiązania:
https://bibliotekanauki.pl/articles/393203.pdf
Data publikacji:
2015
Wydawca:
Polskie Stowarzyszenie Telematyki Transportu
Tematy:
systemy monitorowania przesyłki
wymiana danych morskich
środowisko morskie
shipping monitoring systems
maritime data exchange
environment marine
Opis:
Effectiveness of the contemporary maritime transport depends largely on already implemented intelligent shipping and maritime environment monitoring systems, which are simultaneously responsible for improvement of the maritime transportation process, management and widely understood safety and security. Recently noticed, diversification of existing shipping monitoring systems is based on a different range of covered areas, direct benefits for end-users as well as technical specifications of modern maritime sensors. Nowadays, a totally new approach has been developed as a response to growing demand for integration of all existing maritime systems and building a common platform for maritime data exchange. This solution is expected to be a cost-effective tool in gathering, transforming and dissemination of an integrated and comprehensive recognized maritime picture and relevant maritime data. This paper represents the holistic approach to identification of important factors having impact on possible implementation of such a system. The working hypothesis stating that there are systematic reasons for implementation of a single, common and integrated platform of maritime data exchange has been positively proved. As an example of efforts already taken by European Maritime Safety Agency (EMSA) on the EU seas, the experimental Integrated Maritime Data Environment (IMDatE) solutions have been presented.
Źródło:
Archives of Transport System Telematics; 2015, 8, 2; 37-42
1899-8208
Pojawia się w:
Archives of Transport System Telematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Validation of radar image tracking algorithms with simulated data
Autorzy:
Heymann, F.
Hoth, J.
Banyś, P.
Siegert, G.
Powiązania:
https://bibliotekanauki.pl/articles/117358.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
marine radar
radar image
tracking algorithms
simulated data, multi-target tracker (MTT)
maritimetraffic situation
joint probabilistic data association (JPDA)
optimal sub-pattern assignment (OSPA)
Opis:
Collision avoidance is one of the high-level safety objectives and requires a complete and reliable description of the maritime traffic situation. The radar is specified by the IMO as the primary sensor for collision avoidance. In this paper we study the performance of multi-target tracking based on radar imagery to refine the maritime traffic situation awareness. In order to achieve this we simulate synthetic radar images and evaluate the tracking performance of different Bayesian multi-target trackers (MTTs), such as particle and JPDA filters. For the simulated tracks, the target state estimates in position, speed and course over ground will be compared to the reference data. The performance of the MTTs will be assessed via the OSPA metric by comparing the estimated multi-object state vector to the reference. This approach allows a fair performance analysis of different tracking algorithms based on radar images for a simulated maritime scenario.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 3; 511-518
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The detection of selected marine engine malfunctions on the basis of the exhaust gas composition
Wykrywanie wybranych niesprawności silnika okrętowego w oparciu o skład emitowanych spalin
Autorzy:
Kowalski, J.
Powiązania:
https://bibliotekanauki.pl/articles/327520.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
marine engine
malfunctions detection
exhaust gas composition
data classification
silnik okrętowy
wykrywanie niesprawności
skład spalin
klasyfikacja danych
Opis:
Marine diesel engines are generators of mechanical energy, but also are generators of toxic compounds into the atmosphere. The composition of the exhaust gas may be a carrier of diagnostic information about the condition of functional systems of the engine. Results of the classification and selection of diagnostic signals for selected marine engine malfunctions are presented. The analysis was based on results of laboratory tests. Mentioned classification was able to isolate symptoms of malfunctions of marine 4-stroke diesel engine in the composition of the exhaust gas. Complementary detection signals are exhaust gas temperature behind each cylinder. The conclusion of this work is the ability to detect by this method such engine malfunctions as the throttling the air intake duct, the throttling of the exhaust gas duct, the decreasing and the increasing of fuel injection pressure on the selected cylinder, chocked or discalibrated fuel injector, the leakage of the fuel pump, changing of the fuel injection timing and exhaust and inlet valves malfunctions.
Silniki tłokowe generatorami energii mechanicznej, ale również generatorami emisji związków toksycznych do atmosfery. Skład emitowanych spalin może być nośnikiem informacji diagnostycznej o stanie technicznym układów funkcjonalnych silnika. W pracy przedstawiono wyniki klasyfikacji i wyboru sygnałów diagnostycznych dla wybranych niesprawności silnika okrętowego. Analiza została oparta na wynikach badań laboratoryjnych. W wyniku przeprowadzonych działań udało się wyodrębnić symptomy niesprawności 4-suwowego silnika okrętowego w składzie emitowanych spalin. Sygnałami uzupełniającymi detekcję są temperatury gazów spalinowych za poszczególnymi cylindrami. Wnioskiem z prezentowanej pracy jest możliwość wykrycia tą metodą takich niesprawności silnika jak dławienie kanału dolotowego powietrza i wylotowego spalin, obniżenie i zwiększenie ciśnienia wtrysku paliwa do wybranego cylindra, zakoksowanie lub rozkalibrowanie wtryskiwacza, przecieki w pompie paliwowej, zmiana rozpoczęcia wtrysku paliwa oraz wypalenie gniazd zaworów dolotowych i wylotowych.
Źródło:
Diagnostyka; 2014, 15, 3; 39-44
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assimilation of the satellite SST data in the 3D CEMBS model
Autorzy:
Nowicki, A.
Dzierzbicka-Glowacka, L.
Janecki, M.
Kalas, M.
Powiązania:
https://bibliotekanauki.pl/articles/47919.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
satellite data
assimilation
marine ecosystem
Baltic Sea
ecosystem model
3D CEMBS model
operational oceanography
hydrodynamic parameter
biochemical parameter
Źródło:
Oceanologia; 2015, 57, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ship route planning using historical trajectories derived from AIS Data
Autorzy:
He, Y. K.
Zhang, D.
Zhang, J. F.
Zhang, M. Y.
Li, T. W.
Powiązania:
https://bibliotekanauki.pl/articles/116536.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
AIS Data
Automatic Identification System (AIS)
route planning
historical trajectories
AIS messages
marine traffic
Dijkstra algorithm
ant colony algorithm
Opis:
Ship route planning is one of the key issues in enhancing traffic safety and efficiency. Many route planning methods have been developed, but most of them are based on the information from charts. This paper proposes a method to generate shipping routes based on historical ship tracks. The ship's historical route information was obtained by processing the AIS data. From which the ship turning point was extracted and clustered as nodes. The ant colony algorithm was used to generate the optimize route. The ship AIS data of the Three Gorges dam area was selected as a case study. The ships’ optimized route was generated, and further compared with the actual ship's navigation trajectory. The results indicate that there is space of improvement for some of the trajectories, especially near the turning areas.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 1; 69-76
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
NaAVIC, a free downloadable ECS app that runs on ENC data streamed directly from a cloud-based infrastructure specifically designed for marine navigation
Autorzy:
Peyton, D.
Kuwalek, E.
Alla, A.
Powiązania:
https://bibliotekanauki.pl/articles/117625.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Electronic Navigational Chart (ENC)
ENC data
Electronic Chart System (ECS)
cloud-based infrastructure
marine navigation
ECS app
NaAVIC
nautilus cloud
Opis:
NaAVIC, is a free and downloadable Electronic Chart System app specifically developed for boats of all sizes looking for safe and reliable professional navigation functionality on mobile devices and/or laptops. The app offers a range of features to make navigation easy and reliable, delivered through a clear and intuitive interface designed specifically for navigating at sea. The capabilities cover the range of essential features needed to maintain safety and situational awareness. Separate processes for download and update of the electronic chart data is not required because data is streamed in real-time from a cloud based open source database. The data is supplied to NaAVIC from Nautilus Cloud, a cloud based infrastructure designed for Marine Data, Solutions and Services for Government Organizations, Commercial Industry and Consumers. Nautilus Cloud is a “cloud native” approach and leverages high quality, open source components as its base technology. It uses open standards throughout to build a low-cost system which is flexible and has a much greater degree of interoperability with pre-existing components. A key feature of the Nautilus Cloud platform is the expansion of data holdings into a much wider family of related geospatial data products including the S-100 framework, harmonized metadata, raster and real-time sources. In essence, NaAVIC can operate on real-time and up-to-date information from charting agencies without a separate updating process. This enables the integration of real-time tides, weather, currents and other oceanographic information.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 1; 237-240
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
GIS data standard for environmental protection as applied in the development of protection plan drafts for “Natura 2000” marine protected areas
Standard danych GIS w ochronie przyrody w opracowaniu projektów planów ochrony morskich obszarów Natura 2000
Autorzy:
Pardus, J.
Powiązania:
https://bibliotekanauki.pl/articles/111429.pdf
Data publikacji:
2016
Wydawca:
Instytut Morski w Gdańsku
Tematy:
GIS data standard
SDGIS
natural environment database
Natura 2000 marine areas
standard danych GIS
baza danych przyrodniczych
morskie obszary Natura 2000
Opis:
Spatial databases constitute an essential part of scientific and research studies. As they enable gathered information to be ascribed to a specific geographical location, they contribute to the development of the knowledge base, as well as offering the opportunity to integrate it quickly with other datasets. The aim of this article is to present how a model for a spatial database was created in the process of protection plan drafts for the “Natura 2000” marine areas, basing on the GIS data standard for environmental protection developed in 2009. The paper specifies the problems which hindered its implementation, and the solutions which enabled the development of an aquatic ecosystem inventory within the scope set out in protection plans. The article also emphasises the need to apply a unified standard in environmental studies, and the necessity to refine and update it.
Bazy danych przestrzennych stanowią ważną część opracowań badawczo-naukowych. Dzięki możliwości przypisania zebranych informacji do lokalizacji geograficznej przyczyniają się nie tylko do rozbudowania bazy wiedzy, ale dają również sposobność szybkiej jej integracji z innymi zbiorami danych. Celem niniejszego artykułu jest przedstawienie w jaki sposób budowano model bazy danych przestrzennych przy opracowaniu projektów planów ochrony morskich obszarów Natura 2000 opierając się na przygotowanym w 2009 roku standardzie danych GIS w ochronie przyrody. W pracy wskazano problemy, które napotkano przy jego implementacji oraz opisano przyjęte rozwiązania, które pozwoliły dokonać inwentaryzacji przyrodniczej ekosystemu morskiego zgodnie z zakresem przewidzianym w planach ochrony. W artykule podkreślono również potrzebę stosowania jednolitego standardu w pracach przyrodniczych oraz konieczność jego dopracowania i aktualizacji.
Źródło:
Biuletyn Instytutu Morskiego w Gdańsku; 2016, 31, 1; 110-116
1230-7424
2450-5536
Pojawia się w:
Biuletyn Instytutu Morskiego w Gdańsku
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessing safety effects of digitization with the European Maritime Simulator Network EMSN: the sea traffic management case
Autorzy:
Burmeister, H. C.
Scheidweiler, T.
Reimann, M.
Jahn, C.
Powiązania:
https://bibliotekanauki.pl/articles/116900.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
marine traffic
European Maritime Simulator Network (EMSN)
Sea Traffic Management (STM)
Sea Traffic
traffic management system
traffic management
data-tracker
maritime safety index
Opis:
This paper will give an intro into the technical backbone of the EMSN and derive necessary specifications to allow for objective testing in large scale. Further, it will demonstrate the potential of EMSN as a maritime safety test-bed on the STM case. Therefore, the simulations executed within the EMSN are evaluated regarding their safety level in order to demonstrate the effects of various measures to improve safety. Based on a fuzzy logic approach, numerical Data from the EMSN Data-Tracker is used as an input to assess a present traffic situation from the perspective of a specific ship and outputs a comprehensive safety index developed by expert opinions. The safety index is used to further analyze navigators’ behavior and decisions in different maritime traffic scenarios that are executed within the EMSN.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2020, 14, 1; 91-96
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 container ship traffic model for simulation studies
Autorzy:
Wawrzyniak, Jakub
Drozdowski, Maciej
Sanlaville, Éric
Powiązania:
https://bibliotekanauki.pl/articles/2172133.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
benchmark instances
algorithm evaluation
data analysis
container ship
traffic modeling
marine logistics
instancje wzorcowe
ocena algorytmu
analiza danych
kontenerowiec
modelowanie ruchu
logistyka morska
Opis:
The aim of this paper is to develop a container ship traffic model for port simulation studies. Such a model is essential for terminal design analyses and testing the performance of optimization algorithms. This kind of studies requires accurate information about the ship stream to build test scenarios and benchmark instances. A statistical model of ship traffic is developed on the basis of container ship arrivals in eight world ports. The model provides three parameters of the arriving ships: ship size, arrival time and service time. The stream of ships is divided into classes according to vessel sizes. For each class, service time distributions and mixes of return time distributions are provided. A model of aperiodic arrivals is also proposed. Moreover, the results achieved are used to compare port specific features.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2022, 32, 4; 537--552
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Correlation of Virtual Aids to Navigation to the Physical Environment
Autorzy:
Wright, R.G.
Baldauf, M.
Powiązania:
https://bibliotekanauki.pl/articles/116999.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Aids to Navigation (AtoN)
Virtual Aids to Navigation
physical environment
AIS Data
Electronic Chart Display and Information System (ECDIS) Landmarks
marine navigation
electronic navigation
Opis:
Virtual electronic aids to navigation are being introduced into the present short range aids to navigation system in the form of Automated Information System radio-based aids. Research is also underway into the development of their equivalents for use in regions that feature hostile environments, are poorly charted and lack any infrastructure whatsoever to support traditional or radio navigation aids. Such aids are entirely virtual in nature and exist only as a digital data object that resides within an electronic navigation chart for display to mariners through an Electronic Chart Display and Information System. They are at present experimental in nature, and are not intended to replace existing physical or radio-based aids to navigation. Results of research are described in terms of fulfilling traditional navigation aid functions and the development of new functions that are only possible using virtual aids. Their advantages in design and implementation are highlighted, as are their limitations and shortcomings as compared to present methodologies. Notable, however, is the approach used to overcome limitations and shortcomings by considering attributes of the physical environment to ensure their proper location and display of correct characteristics. Such an approach is unique in the modern world, yet it emulates ancient methods of navigation using known landmarks and terrain features.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2016, 10, 2; 287-299
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Decision support system for collision avoidance at sea
Autorzy:
Lazarowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/259152.pdf
Data publikacji:
2012
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
anti-collision system
collision avoidance
safety of navigation
safe ship control
computer simulation
decision support system
navigational data
marine navigation
path planning
ant colony optimization
Opis:
The paper presents design and realization of computer decision support system in collision situations of passage with greater quantity of met objects. The system was implemented into the real ship electro-navigational system onboard research and training ship m/v HORYZONT II. The radar system with Automatic Radar Plotting Aid constitutes a source of input data for algorithm determining safe trajectory of a ship. The article introduces radar data transmission details. The dynamic programming algorithm is used for the determination of safe optimal trajectory of own ship. The system enables navigational data transmission from radar system and automatic determining of safe manoeuvre or safe trajectory of a ship. Further development of navigator’s decision support system is also presented. Path Planning Subsystem is proposed for the determination of global optimal route between harbours with the use of Ant Colony Optimization algorithms.
Źródło:
Polish Maritime Research; 2012, S 1; 19-24
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary inter-comparison of AIS Data and optimal ship tracks
Autorzy:
Mannarini, G.
Carelli, L.
Zissis, D.
Spiliopoulos, G.
Chatzikokolakis, K.
Powiązania:
https://bibliotekanauki.pl/articles/116108.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
AIS Data
ship track
Copernicus Marine Environment Monitoring Service (CMEMS)
Automatic Identification System (AIS)
VISIR (discoVerIng Safe and effIcient Routes)
VISIR track
VISIR model
optimal ship track
Opis:
Optimal ship tracks computed via the VISIR model are compared to tracks recorded by the Automatic Identification System (AIS). The evaluation regards 43 tracks in the Southern Atlantic Ocean, sailed during 2016-2017 by different bulk carriers. In this exercise, VISIR is fed by wave analysis fields from the Copernicus Marine Environment Monitoring Service (CMEMS). In order to reproduce vessel speed loss in waves, a new methodology is developed, where kinematic information from AIS is fusioned with wave information from CMEMS. Resulting VISIR tracks are analyzed along with AIS tracks in terms of their topological features and duration. The tracks exhibit quite diverse topological shapes, including orthodromic, loxodromic, and other paths with complex and dynamic diversions. The distribution of AIS to VISIR track durations is analyzed in terms of several parameters, such as the AIS to VISIR track length and their Fréchet distance. Model features of VISIR affecting the results are discussed and future developments suggested by the results are outlined.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 1; 53-61
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
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