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Wyszukujesz frazę "weather parameters" wg kryterium: Temat


Wyświetlanie 1-5 z 5
Tytuł:
Ship’s operational speed on the planned ocean route in real weather conditions
Autorzy:
Szelangiewicz, Tadeusz
Żelazny, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/27315876.pdf
Data publikacji:
2018
Wydawca:
STE GROUP
Tematy:
ocean route
ship speed
weather parameters
ship propulsion
trasa oceaniczna
prędkość statku
parametr pogodowy
napęd statku
Opis:
While operating the ship, one of the most important tasks is forecasting the ocean route. For this purpose, the speed characteristics of the ship are used, which are used in specialized computer systems and presented in publications. However, published algorithms for speed (or decrease of speed) calculations of a ship in real weather conditions on given routes are very simplified and do not contain all the relevant parameters related to the ship's hull (affecting its resistance when sailing, eg on waves), its propulsion and weather conditions. The article presents its own, more detailed mathematical model of the speed of the ship, and the performed calculations of speed of the ship were compared with the algorithms available in the literature and with the records from the ship's log.
Źródło:
New Trends in Production Engineering; 2018, 1, 1; 159-166
2545-2843
Pojawia się w:
New Trends in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Average fuel consumption by a ship on a sales line in statistical weather conditions
Autorzy:
Szelangiewicz, T.
Żelazny, K.
Powiązania:
https://bibliotekanauki.pl/articles/27315961.pdf
Data publikacji:
2018
Wydawca:
STE GROUP
Tematy:
zużycie paliwa
prędkość statku
moc napędowa
linie żeglugowe
średnie statystyczne parametry pogodowe
fuel consumption
ship speed
propulsion power
shipping lines
average statistical weather parameters
Opis:
During operation of the ship, fuel consumption and associated emissions are very important for economic and ecological reasons. The fuel consumption is greatly influenced by the choice of shipping route, weather conditions on these routes and engine control criteria. The article presents its own algorithm for forecasting ship operation parameters, including fuel consumption on selected shipping routes for average, statistical (seasonal) weather parameters occurring on these routes. It shows what factors have the main impact on fuel consumption and how you can affect fuel consumption during the cruise in changing weather conditions.
Źródło:
New Trends in Production Engineering; 2018, 1, 1; 573-579
2545-2843
Pojawia się w:
New Trends in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmiany w składzie chemicznym gleby leśnej i porolnej po wprowadzeniu trocin iglastych na tle przebiegu elementów pogody
Chemical composition of soils on post-agricultural and forest sites before and after sawdust addition against the background of weather elements
Autorzy:
Małecka, M.
Wójcik, J.
Sierota, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1317240.pdf
Data publikacji:
2014
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
chemia srodowiska
gleby porolne
gleby lesne
sklad chemiczny
odczyn gleby
stosunek wegla do azotu
zawartosc wapnia
zawartosc magnezu
zawartosc potasu
zawartosc fosforu
zawartosc azotu
zawartosc wegla
dodatki do gleb
trociny iglaste
zmiany skladu chemicznego
czynniki meteorologiczne
opady atmosferyczne
temperatura powietrza
temperatura gleb
chemical composition
fallow soil
forest soil
sawdust
weather parameters
Opis:
We analysed changes in soil chemical properties (pH, C:N, N, P, K, Ca, Na) inside two forest areas chosen for renewal (Lubartów A and B) and within one post-agricultural site (OEwierczyna) designated for afforestation with Scots pine. The experimental plots were located in areas known as persistent cockchafer grub spots. The Lubartów A site was not fenced and showed signs of wild boar activity. Analyses were carried out in the autumn of 2011 and spring 2012, prior to pine sawdust application to the soil and before tree planting, respectively, and again one year later in May 2013. Precipitation as well as air and soil temperatures were recorded throughout the experimental period. We found that soil temperature and humidity, determined by changes in weather, differences in soil chemical properties between forest and agricultural sites as well as sawdust treatments differentially affected soil reaction, C:N ratios and nutrient content . In the unfenced area (Lubartów A), the content of nutrient forms available to plants decreased no more under sawdust treatment than under control conditions. In the remaining areas, sawdust treatment caused an increase or no change in soil concentrations of the investigated nutrients. Under suitable temperature and humidity conditions, sawdust can represent a significant source of energy-rich compounds promoting diversified edaphone activity, which appears to be the main reason for changes in soil nutrient content.
Źródło:
Leśne Prace Badawcze; 2014, 75, 2; 139-148
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ship service speeds and sea margins
Autorzy:
Szelangiewicz, T.
Żelazny, K.
Powiązania:
https://bibliotekanauki.pl/articles/135645.pdf
Data publikacji:
2016
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
design of transport vessels
contractual and service speed
sea margin
seasonal weather conditions
design parameters
decision-making
Opis:
When designing a transport vessel, one of the most important parameters assumed by the owner is the service speed of the ship. Service speed and motor power are calculated as an approximation of the ship’s speed in calm water (i.e., the contract speed) with the addition of the sea margin (SM). In current design practice, the addition of SM is not dependent on weather parameters occurring in liner shipping. This paper proposes a new method for establishing the value of SM depending on the type and size of the vessel and the average statistical weather parameters occurring on various shipping lines. The results presented in this paper clearly demonstrate that further research is needed to determine the precise relationship between the shipping and vessel type and the weather parameters on a shipping line.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2016, 48 (120); 43-50
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative analysis of the data on the surface currents and wind parameters generated by numerical models on the Szczecin Lagoon area
Autorzy:
Kijewska, M.
Pleskacz, K.
Kasyk, L.
Powiązania:
https://bibliotekanauki.pl/articles/117323.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Szczecin Lagoon
surface current
wind parameters
hydrodynamic model
weather forecast
numerical models
Geographic Information System (GIS)
High Frequency Surface Wave Radar (HFSWR)
Opis:
This study focuses on the investigation of available surface currents and wind parameters for employing them in order to predict the survivor movement in the Szczecin Lagoon waters. For this purpose, the surface currents and wind parameters were generated by selected numerical models and the wind parameters were also measured with the telemetry devices. In this paper, the PM3D hydrodynamic model and the NEMS, ECMWF, GFS weather forecast models have been investigated. The measurements of the wind parameters, recorded at the Brama Torowa I and Trzebież stations, were also analyzed. As part of the research, an expert method was used to evaluate the surface currents parameters. In turn, the method based on comparing the forecasted wind parameters with the measured wind parameters was applied in order to assess uncertainties of these parameters. The comparative analyses of the data on the surface currents and wind parameters have been done and probabilistic models for uncertainties of these forecasted parameters have been formulated. Additionally, relations between the surface currents speeds and the wind speeds, in the case when their directions were consistent, have been also discovered.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 4; 729-737
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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