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Wyświetlanie 1-2 z 2
Tytuł:
Spectral density estimation for stationary stable random fields
Autorzy:
Sabre, Rachid
Powiązania:
https://bibliotekanauki.pl/articles/1340288.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
(S.α.S) process
double kernel method
periodogram
Jackson kernel
Opis:
We consider a stationary symmetric stable bidimensional process with discrete time, having the spectral representation (1.1). We consider a general case where the spectral measure is assumed to be the sum of an absolutely continuous measure, a discrete measure of finite order and a finite number of absolutely continuous measures on several lines. We estimate the density of the absolutely continuous measure and the density on the lines.
Źródło:
Applicationes Mathematicae; 1995-1996, 23, 2; 107-133
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of combustion process in cylinders of diesel engine based on its working achievements
Autorzy:
Roslanowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/246394.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
stochastic process of engine operation
energy transformation
periodogram of engine operation
diagnosis of heat generating process in engine cylinder
Opis:
Elements of Modern ships' main combustion driven engines are subject to immense heat and mechanical loads. It is therefore advisable to supervise the regularity of heat generation in engine 's cylinder s. In order to diagnose the process of heat generation in engine's cylinder s, this article propagates the use of momentmetre. Described method allows estimating faulty combustion on the basis of autocorrelation of moment temporary values on the shaft after three successive rotations. The paper brings to attention how the work of diesel engine may be usedfor estimation of combustion process correctness in this engine cylinder. The work of diesel engine is connected with transfer of effective energy to ship propeller during its operation. Due to accidental naturę of combustion inside engine cylinder s it stochastic internally stationary process. To say more it is stochastic internally stationary process with ergodic feature. It makes possible to describe expected engine work by means of stochastic second order characteristics. They are autocorrelation functions and spectrum density of self power functions depending on time and frequency. Both above mentioned functions are uniquely connected with combustion in engine cylinders and it is possible to estimate the correctness of engine operation. It is also possible to estimate if the work of engine in given sail conditions is equal to reguirements of imposed tasks. If this reguirement is not met in the case of one propeller ship it can lead to the loss of ship stability and as a result can cause the ship sink.
Źródło:
Journal of KONES; 2010, 17, 2; 409-415
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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