Autor: Yu, L. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Construction method of the topographical features model for underwater terrain navigation
Autorzy:: Wang, L.
Yu, L.
Zhu, Y.
Powiązania:: https://bibliotekanauki.pl/articles/259976.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: Terrain Aided Navigation
terrain features
Terrain Navigation Information Content (TNIC)
correlation
Opis:: Terrain database is the reference basic for autonomous underwater vehicle (AUV) to implement underwater terrain navigation (UTN) functions, and is the important part of building topographical features model for UTN. To investigate the feasibility and correlation of a variety of terrain parameters as terrain navigation information metrics, this paper described and analyzed the underwater terrain features and topography parameters calculation method. Proposing a comprehensive evaluation method for terrain navigation information, and constructing an underwater navigation information analysis model, which is associated with topographic features. Simulation results show that the underwater terrain features, are associated with UTN information directly or indirectly, also affect the terrain matching capture probability and the positioning accuracy directly.
Źródło:: Polish Maritime Research; 2015, S 1; 121-125
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Modeling of acoustic field for a parametric focusing source using the spheroidal beam equation
Autorzy:: Yu, L.
Li, J.
Shi, C.
Powiązania:: https://bibliotekanauki.pl/articles/258564.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: parametric focusing source
difference frequency wave
SBE
acoustic field
Opis:: A theoretical model of acoustic field for a parametric focusing source on concave spherical surface is proposed. In this model, the source boundary conditions of the Spheroidal Beam Equation (SBE) for difference frequency wave excitation were studied. Propagation curves and beam patterns for difference frequency component of the acoustic field are compared with those obtained for Khokhlov-Zabolotskaya-Kuznetsov (KZK) model. The results demonstrate that the focused parametric model of SBE is good valid for a large aperture angle in the strongly focused acoustic field. It is also investigated that high directivity and good focal ability with the decreasing of downshift ratio and the increasing of half-aperture angle for the focused parametric model of SBE.
Źródło:: Polish Maritime Research; 2015, S 1; 43-47
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: The research on characteristic parameters and resistance chart of operation and maintenance trimaran in the sea
Autorzy:: Chen, Y.
Yang, L.
Xie, Y.
Yu, S.
Powiązania:: https://bibliotekanauki.pl/articles/258516.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: wind power maintenance
trimaran
characteristic parameter
CFD
resistance charts
Opis:: The paper determined the volume ratio of the main hull and side hull and their position characteristic parameter of operation and maintenance trimaran. Numerical simulation technology was used to do the analysis and calculation of trimarans which have different volume ratio of the main and side hull, and on this basis, the paper tried different positions of main and side hull, finally got the trimaran with optimum resistance performance and the chart of trimaran resistance estimation, so as to provide a new way in the selection of feature parameter of offshore wind farm maintenance trimaran and its resistance estimation.
Źródło:: Polish Maritime Research; 2016, S 1; 20-24
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

Artykuł

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