- Tytuł:
- Application of movable approximation and wavelet decomposition to smoothing-out procedure of ship engine indicator diagrams
- Autorzy:
- Polanowski, S.
- Powiązania:
- https://bibliotekanauki.pl/articles/260419.pdf
- Data publikacji:
- 2007
- Wydawca:
- Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
- Tematy:
-
smoothing-out the runs
least squares method
full-interval approximation
movable approximation
decomposition of disturbances
cut constraints
glued constraints
riveted constraints
broken constraints
weighting factors
wavelet decomposition - Opis:
- In this paper - on the basis of indicator diagram processing taken as an example - were shown possibilities of the smoothing-out and decomposing of run disturbances with the use of the movable multiple approximation based on the least squares criterion. The notion was defined of movable approximating object and constraints used to form approximation features. It was demonstrated that the multiple approximation can be used to decompose disturbances out of an analyzed run. The obtained smoothing-out results were compared with those obtained from full-interval approximation of runs by means of splines as well as wavelet decomposition with using various wavelets, Wavelet Explorer and Mathematica software. Smoothing-out quality was assessed by comparing runs of first derivatives which play crucial role in the advanced processing of indicator diagrams.
- Źródło:
-
Polish Maritime Research; 2007, 2; 12-17
1233-2585 - Pojawia się w:
- Polish Maritime Research
- Dostawca treści:
- Biblioteka Nauki
Artykuł