Temat: Zig-Zag - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Zig-zag facial total-coloring of plane graphs
Autorzy:: Czap, J.
Jendrol, S.
Voigt, M.
Powiązania:: https://bibliotekanauki.pl/articles/255827.pdf
Data publikacji:: 2018
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: plane graph
facial coloring total-coloring zig-zag coloring
Opis:: In this paper we introduce the concept of zig-zag facial total-coloring of plane graphs. We obtain lower and upper bounds for the minimum number of colors which is necessary for such a coloring. Moreover, we give several sharpness examples and formulate some open problems.
Źródło:: Opuscula Mathematica; 2018, 38, 6; 819-827
1232-9274
2300-6919
Pojawia się w:: Opuscula Mathematica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Morphological and enzymatic variability and adaptation of zig-zag clover [Trifolium medium L.]
Autorzy:: Bulinska-Radomska, Z
Powiązania:: https://bibliotekanauki.pl/articles/2043605.pdf
Data publikacji:: 1999
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: zig-zag clover
Polska
enzyme variability
adaptation
morphological variability
Trifolium medium
climate
Źródło:: Journal of Applied Genetics; 1999, 40, 4; 293-304
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Features of an ultra-large container ship mathematical model adjustment based on the results of sea trials
Autorzy:: Pipchenko, O. D.
Tsymbal, M.
Shevchenko, V.
Powiązania:: https://bibliotekanauki.pl/articles/116848.pdf
Data publikacji:: 2020
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: containerization
container Ship
ultra-large container ship
zig-zag test
container shipping
mathematical model
sea trial test
Nelder-Mead Method
Opis:: The research addresses the problem of an ultra-large container ship mathematical model adjustment based on sea trials. In order to verify the model’s adequacy, simulated data had to be compared to the trial report data, which was obtained in ballast condition with significant trim. In such circumstances, model coefficients cannot be calculated by known methods and have to be corrected as per trial data. It is proposed to determine translational motion coefficients first. To get optimal results, it was also proposed to divide the objective function into kinematic and dynamic components, with each component being assigned a weighting factor. A separate objective function component was assigned to the zig-zag maneuver, which includes the first and second overshoot angles.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2020, 14, 1; 163-170
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Identification of Ship Maneuvering Model Using Extended Kalman Filters
Autorzy:: Shi, C.
Zhao, D.
Peng, J.
Shen, C.
Powiązania:: https://bibliotekanauki.pl/articles/116777.pdf
Data publikacji:: 2009
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: Manoeuvring
Ship Manoeuvering Model
Kalman filter
extended Kalman filter (EKF)
Ship Manoeuvrability
ship handling simulator
Turning Circle Test
Zig-Zag Test
Opis:: Ship maneuvering models are the keys to the research of ship maneuverability, design of ship motion control system and development of ship handling simulators. For various frames of ship maneuvering models, determining the parameters of the models is always a tedious task. System identification theory can be used to establish system mathematical models by the system’s input data and output data. In this paper, based on the analysis of ship hydrodynamics, a nonlinear model frame of ship maneuvering is established. System identification theory is employed to estimate the parameters of the model. An algorithm based on the extended Kalman filter theory is proposed to calculate the parameters. In order to gain the system’s input and output data, which is necessary for the parameters identification experiment, turning circle tests and Zig-zag tests are performed on shiphandling simulator and the initial data is collected. Based on the Fixed Interval Kalman Smoothing algorithm, a pre-processing algorithm is proposed to process the raw data of the tests. With this algorithm, the errors introduced during the measurement process are eliminated. Parameters identification experiments are designed to estimate the model parameters, and the ship maneuvering model parameters estimation algorithm is extended to modify the parameters being estimated. Then the model parameters and the ship maneuvering model are determined. Simulation validation was carried out to simulate the ship maneuverability. Comparisons have been made to the simulated data and measured data. The results show that the ship maneuvering model determined by our approach can seasonably reflect the actual motion of ship, and the parameter estimation procedure and algorithms are effective.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 1; 105-110
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

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