Temat: ships - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Emission of hydroacoustics noise of ships with adjustment propeller
Autorzy:: Domagalski, J.
Dobrzeniecki, J.
Powiązania:: https://bibliotekanauki.pl/articles/332548.pdf
Data publikacji:: 2009
Wydawca:: Polskie Towarzystwo Akustyczne
Tematy:: hydroacoustics noise
ships
adjustment propeller
Opis:: In the present is furnished results of research of underwater emissions of disturbances in work by ship with adjustable propellers. Verification of level of noise emission was purpose of research dispose by shipping propellers depending on their. Noise have been presented from shipping propellers in background of noise from driving matches dating.
Źródło:: Hydroacoustics; 2009, 12; 39-44
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Kohonen networks as ships classifier
Autorzy:: Żak, A.
Powiązania:: https://bibliotekanauki.pl/articles/331686.pdf
Data publikacji:: 2008
Wydawca:: Polskie Towarzystwo Akustyczne
Tematy:: Kohonen networks
hydroacoustics
ships classifier
Opis:: The paper presents the technique of artifficial neural networks used as classifier of hydroacoustic signatures generated by moving ship. In the paper firstly the method of feature extraction from hydracoustic signatures using calculation of Mel-Frequency Cepstral Coefficients was discussed. Next the mathod of feature matching using for purpose of object classification basing on hydroacoustic signatures was described. The technique of artificial neural networks especially Kohonen networks which belongs to group of self organizing networks where chosen to solve the research problem of classification. the choice was caused by some advantages of mentioned kind of neural networks for example they are ideal for finding relationships amongst complex sets of data, they have possibility to self expand the set answers for new input vectors. To check the correctness of classifier work the research in which the number of right classification for presented and not presented before hydroacoustic signatures were made. some results of research were presented on this paper.
Źródło:: Hydroacoustics; 2008, 11; 467-476
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Acoustic method of valuation of ships drive mechanism operation
Autorzy:: Domagalski, J.
Dobrzeniecki, J.
Powiązania:: https://bibliotekanauki.pl/articles/331541.pdf
Data publikacji:: 2008
Wydawca:: Polskie Towarzystwo Akustyczne
Tematy:: ships’ drive mechanism
acoustic method
hydroacoustic
Opis:: The paper is presented the method of valuation of ships drive mechanism operation by comparison of noise level in ship's rooms, vibrations in selected places of drive fastening and acoustic disturbances generated by a ship to water environment. Selected researches results are presented in form of graphs.
Źródło:: Hydroacoustics; 2008, 11; 79-86
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Ships underwater noise measurements using sound intensity method
Autorzy:: Gloza, I.
Powiązania:: https://bibliotekanauki.pl/articles/332552.pdf
Data publikacji:: 2009
Wydawca:: Polskie Towarzystwo Akustyczne
Tematy:: underwater noise
ships
sound intensity method
Opis:: Ship noise is a most important part of the field of underwater acoustics. Its reduction and monitoring is an important aspect in the performance of underwater acoustic systems and in the habitability of the vessel for the crew and passengers. In naval operations the noise radiated by a ship is also dominant source of information for underwater sonar systems. Sound intensity is the vector quantity which informs us about the sound power flux, the position and the direction of the sound source. The probe tracks the position of source and at the same time, measures the component of sound-intensity vector. Generally only one component of vector sound intensity was measured, perpendicular to a given measurement surface. The sound intensity of a moving source includes effects such as flow noise that are not present when the source is stationary. The accuracy of measuring acoustic intensity using two closely spaced hydrophones by correcting the phase mismatch error by measuring the transfer function between the two detector systems was examined. The two measuring hydrophone instrumentation systems were earlier calibrated. Our results have been obtained using digital methods, where was used PULSE measuring system.
Źródło:: Hydroacoustics; 2009, 12; 53-60
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: The examination of position of ships noises sources based on hydroacoustics method
Autorzy:: Listewnik, K.
Powiązania:: https://bibliotekanauki.pl/articles/331584.pdf
Data publikacji:: 2008
Wydawca:: Polskie Towarzystwo Akustyczne
Tematy:: hydroacoustics method
ship’s noises sources
hydroacoustics
Opis:: The paper presents the experimental research associated with the transmission of acoustic energy generated by moving ship into the water. The paper present the methodology of evaluations acoustics energy from the mechanisms of ship into the water environment. For that purpose the research of noise distribution over ship's hull were conducted along with the hydroacoustic field. The hull is source of waves of complex surface shape inducing waves of different amplitudes and phases depending on the position of ship's machinery. As a result of the hull vibrations generated wave distribution depending on the primary sources, as the main propulsion units, generators or other mechanisms. This research allowed to determine position of the main noises' sources of acoustics energy of machinery and propulsion system depending on class of ships.
Źródło:: Hydroacoustics; 2008, 11; 247-253
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Historical torpedo proving ground on the Puck Bay and Polish Navy Control and Measurement Unit
Autorzy:: Kamińska, K.
Listewnik, K.
Powiązania:: https://bibliotekanauki.pl/articles/332788.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Akustyczne
Tematy:: history of Puck Bay
ships signatures history
signature ranges
Opis:: This article briefly presents a description of the historic use of the Puck Bay area to test military equipment, and the history of the Polish Navy Control and Measurement Unit, main tasks and facility. The aim of this presentation is to bring together participants in the symposium of the general background of activities in the area of hydroacoustics many times presented previously. In addition, the present symposium is devoted to the memory of Capt. Ignacy Gloza, who has served here for many years. Finally, the traditional annual tour organized during the symposium this year took place in the waters of the Puck Bay, and one of the aims of this presentation is to bring the participants closer to what they see.
Źródło:: Hydroacoustics; 2017, 20; 179-185
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

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