Temat: interwał - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Stability of interval positive continuous-time linear systems
Autorzy:: Kaczorek, T.
Powiązania:: https://bibliotekanauki.pl/articles/201327.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: interval
positive
linear
continuous-time
system
stability
interwał
stabilność
Opis:: It is shown that the convex linear combination of the Hurwitz polynomials of positive linear systems is also the Hurwitz polynomial. The Kharitonov theorem is extended to the positive interval linear systems. It is also shown that the interval positive linear system described by state equation x ̇ = Ax, A ϵ ℜ^n×n, A1 ≥ A ≤ A2 is asymptotically stable if and only if the matrices A_k = 1, 2 are Hurwitz Metzler matrices.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 1; 31-35
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: MENSURA INSTRUMENTI ORGANICI – CZYLI JAK STROJONO ORGANY W X W
MENSURA INSTRUMENTI ORGANICI – HOW THE PIPE ORGAN WERE TUNED IN THE X CENTURY
Autorzy:: Dyka, Lucjan
Powiązania:: https://bibliotekanauki.pl/articles/947233.pdf
Data publikacji:: 2017
Wydawca:: Stowarzyszenie Polskich Muzyków Kościelnych
Tematy:: organy
piszczałka
strój naturalny
stosunek liczbowy
harmonia
interwał
pipe organ
pipe
natural tuning
ratio
harmony
interval
Opis:: The paper is intended to interpret the anonymous Latin Treaty entitled Mensura instrumenti organici written in the X century. The text is very concise and takes the form of a simple instruction intended for a potential constructor of pipe organs. Tuning pipes (of the same circuit) is performed exclusively by means of two ratios – epitritos (4:3) and epogdoos (9:8). The exact calculation confirms that this method proved to be reliable and results in well-tuned pipes using natural Pythagorean tuning in three octave range. Numerous mathematical calculations and the figures of pipes measurements are presented in the paper. The issues of terminology are explained in detail and Greek and Latin texts necessary for the proper interpretation of the treaty are also presented.
Źródło:: Musica Ecclesiastica; 2017, 12; 37-53
2353-6985
Pojawia się w:: Musica Ecclesiastica
Dostawca treści:: Biblioteka Nauki

Artykuł

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