Temat: links system - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Analysis of the key elements of the mechanism of formation of the system of intra-cluster interaction
Autorzy:: Vasylchenko, Anastasiia
Powiązania:: https://bibliotekanauki.pl/articles/1394588.pdf
Data publikacji:: 2021-06-30
Wydawca:: Uniwersytet Gdański. Instytut Geografii
Tematy:: clusters
system-forming links
structural components of system-forming links of clusters
principles of state regulation
Opis:: The article considers the key elements that influence the mechanism of formation of the system of intra-cluster interaction. The article analyzes the competitiveness of the national economy as one of the system-forming factors, the mechanisms of self-organization of cluster formations, the properties of integration and cooperation of the participants of cluster formations, and it analyzes the structure of cluster system connections and develops the principles of state policy to promote the development of cluster formations.
Źródło:: Journal of Geography, Politics and Society; 2021, 11, 2; 44-49
2084-0497
2451-2249
Pojawia się w:: Journal of Geography, Politics and Society
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Mathematical model of flexible link dynamics in marine tethered systems considering torsion and its influence on tension force
Autorzy:: Trunin, Konstantin
Powiązania:: https://bibliotekanauki.pl/articles/32922104.pdf
Data publikacji:: 2023
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: underwater tethered system
flexible links
rigidity
submersible vehicle
Opis:: The rigidity in bending of a flexible link (is an important characteristic that should be considered during regular service conditions. The tension and bending with torsion of wire ropes are also significant factors. This study proposed a method to calculate the vectors of the generalised forces of bending of flexible links. One of the causes of torsional stresses in the power plant of underwater tethered systems is the interaction with ship equipment, such as spiral winding on the winch drum, friction on the flanges of the pulleys or winch drums, and bends on various blocks and rolls that cause torsion. The source of torsional stresses in the FL may also be related to manufacturing, storage, transportation, and its placement on the ship’s winch drums. Torsion can lead to a decrease in the tensile strength due to load redistribution between power elements, or even a violation of their structure. In some cases, torsion significantly affects the movement of the underwater tethered system as a whole. The development of a mathematical model to describe the marine tethered systems dynamics, taking into account the effect of torsion, is important and relevant. The mathematical model of the marine tethered systems dynamics was improved and solved by accounting for the generalised forces of the torsion rigidity of the flexible link, using an algorithm and computer program. The influence of the bending and torsional rigidity of the FL on its deflection and tensile strength were considered based on the example of two problems. The developed program’s working window image shows the simulated parameters and the initial position of the flexible link. The results show that torsion has almost no effect on the shape of the a flexible link’s deflection in the X0Z plane, but leads to a deviation from the X0Z plane when calculating the static deflection of the flexible link. When the carrier vessel is stationary and the submersible vehicle has no restrictions on movement and has positive buoyancy, torsion leads to a three-dimensional change in the shape of the flexible link both in the X0Z plane and in the X0Y plane. The tension force of the flexible link along its length is distributed unevenly, and the torsion of the flexible link can lead to significant changes in its shape, the trajectory of towed objects, and the forces acting on the elements of the marine tethered systems.
Źródło:: Polish Maritime Research; 2023, 2; 188-196
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Identification of weak links in the ECDIS - operator system based on simulator training
Autorzy:: Pipchenko, O.
Burenkov, O.
Tsymbal, M.
Pernykoza, V.
Powiązania:: https://bibliotekanauki.pl/articles/1841563.pdf
Data publikacji:: 2021
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: Electronic Chart Display and Information System
simulator training
operator system
Electronic Position Fixing System
dead reckoning
Electronic Chart System
passage planning
weak links
Opis:: Statistics, based on grounding incident investigations, is not always sufficient for retrieving objective information and designing comprehensive solutions for improving the ECDIS training process for deck officers and development of methods aimed at reducing the grounding incident rate and improving the effectiveness of navigation. The research studies statistics on deck officers` errors made during training on bridge simulators equipped with ECDIS and provides an analysis of errors distribution among navigators of different ranks. The study shows that in event of the EPFS (Electronic Position Fixing System) failure the likelihood of grounding increases dramatically for all deck officers, irrespective of rank and experience, despite having fully functional radar and ECDIS in dead reckoning mode.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2021, 15, 1; 83-88
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

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