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Wyszukujesz frazę "Tichá, S." wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
The models for the comparison of roundness profiles
Autorzy:
Tichá, S.
Adamczak, S.
Powiązania:
https://bibliotekanauki.pl/articles/384343.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
roundness
correlation coefficients
mathematical models
comparison
Opis:
Roundness is one of the mostly frequently observed geometrical deviations. A profile of a machine part consisting of simple harmonic courses or their sums depends on a number of factors. Modeling of geometrical deviations requires applying the Fourier to extend each periodical function into an infinite series of harmonic components. Using of harmonic analysis we are able to determine the values of amplitudes of single components and their phase shifts. These parameters can be used for example for comparison of roundness profiles by means of correlation coefficients. The obtained correlation coefficients are concrete parameters, on the basis of which it is possible to determine the degree of conformity and unity between the compared profiles. The comparison of evaluated roundness profiles can be represented as mathematical statistical models. In these models is detected sequence of single steps, which are necessary for determination of required correlation coefficients [1, 2] .
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2012, 6, 3; 27-29
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Distribution and ecological requirements of Sorbus torminalis (L.) Crantz in the Czech Republic
Autorzy:
Madera, P.
Ticha, S.
Repka, R.
Powiązania:
https://bibliotekanauki.pl/articles/41237.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Opis:
This study addresses the distribution of the wild service tree Sorbus torminalis (L.) Crantz in the Czech Republic by drawing on publicly available databases and herbarium records. In the Czech Republic, this tree occurs in stands at a proportion greater than 1% in 4350.32 ha of forests; the reduced area of the species is 86.42 ha. However, mapping the biotopes for Natura 2000 showed 3627 segments of biotopes, with the wild service tree occurring in a total area of 31274.4 ha. There are approximately 220179 wild service tree individuals in the Czech Republic. This tree is found at altitudes from 175 to 760 m a.s.l., with the centre between 250 and 450 m a.s.l. It shows no preference for slope orientation and is mostly located at sites with rich, and frequently humus-enriched, soils; however, it is often found at extreme sites with shallow soils in the 1st –5th forest altitudinal zones. In the Czech Republic, the wild service tree clearly prefers plant communities of cl. Querco-Fagetea; however, its occurrence was recorded in 10 other classes (20 alliances) of the phytocoenological system. In the conditions of the Czech Republic, natural regeneration of the wild service tree occurs in approximately 55% of the stands in which it is present.
Źródło:
Dendrobiology; 2013, 69
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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