Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "temperature changes" wg kryterium: Temat


Wyświetlanie 1-5 z 5
Tytuł:
Impact of climate change on vegetation period of basic species of vegetables in Slovakia
Autorzy:
Čimo, Ján
Šinka, Karol
Tárník, Andrej
Aydin, Elena
Kišš, Vladimír
Toková, Lucia
Powiązania:
https://bibliotekanauki.pl/articles/1844399.pdf
Data publikacji:
2020
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
average temperature
basic species of vegetables
climate change
temperature changes
vegetation period
Opis:
The aim of the paper is to provide climatic data from the basic elements and characteristics of the energy balance in terms of the current state and in terms of trends and assumptions of their future changes in Slovakia. Climate change affect agriculture and its procedures. Changes in vegetation period in Slovakia of selected vegetables are presented in this study. We used for agro-climatic analysis one hundred climatological stations, which were selected to cover all agricultural regions up to 800 m a.s.l. Actual data and predictions were compared with time period 1961–2010. Due to homogeneity in data measurements, was chosen this period. We obtained climate trends and assumed map outputs of future climate changes by mathematical-statistical methods for horizons of years 2011–2020, 2041–2050, 2071–2080 and 2091–2100. We analysed vegetation period changes of selected fruit vegetables, Brassica vegetables and root vegetable in field conditions with prediction to year 2100. In our results is shown the earlier beginning of vegetation period in a spring and later end in an autumn in last 30 years. The vegetation period is getting longer about 15–20 days for Capsicum annuum; 15–20 days for Brassica oleracea var. capitate; 10–15 days for Beta vulgaris subsp. vulgaris with comparation of nowadays situation and period 2091–2100.
Źródło:
Journal of Water and Land Development; 2020, 47; 38-46
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of mass matrix forms on numerical simulations results in heat conduction modeling
Autorzy:
Zych, M.
Powiązania:
https://bibliotekanauki.pl/articles/122680.pdf
Data publikacji:
2015
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
heat conduction
temperature changes
matrix
przewodzenie ciepła
zmiany temperatury
macierz
Opis:
The paper presents an analysis of the impact of the mass matrix on the changes in temperature during the computer simulation (using the method of finite elements) of the heat conduction process. The temperature variations of the phenomenon was taken into consideration, which is required during the solidification simulation of binary alloys. It was shown that the smallest oscillation occurs in the lumped matrices in the initial stage of the simulation. The results for lumped and diagonal matrix are mostly equal.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2015, 14, 3; 149-156
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of the magnetic particles concentration on the ferro-oil’s dynamic viscosity in presence of an external magnetic field in the aspect of temperature changes
Autorzy:
Czaban, A.
Frycz, M.
Horak, W.
Powiązania:
https://bibliotekanauki.pl/articles/247080.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
ferro-oil
dynamic viscosity
magnetic particles concentration
temperature changes
external magnetic field
Opis:
There is presented an effect of the changes of the concentration of magnetic particles included in the ferro-oil on its dynamic viscosity in the presence of external magnetic field in this paper. The study was conducted in the context of temperature’s changes. The authors assume that the concentration of magnetic particles in ferro-oil can significantly affects its basic physical properties as dynamic viscosity, as well as the operational properties of journal sliding bearings ferro-oil’s lubricated. The equally significant as the above mentioned properties may affect the external environmental conditions of operation, especially temperature changes. In this context, an important technique’s issue appears to determine the principles of selection of optimal concentration of above mentioned particles according to the existing environmental conditions of its operation, or the expectations laid against the operation of the devices. Rheological studies were carried out on Physica MCR 301 rheometer in the “plate-to-plate” measurement system with an adapter to magneto-rheological studies MRD 180/1T. Thermal stabilization was carried out by a water jacket in a closed chamber and controlling the nature of the magnetic field was conducted by current’s changes. Tests were performed for four selected temperature range of 60º, 70º, 80º and 90ºC as regards changes an external magnetic field intensity 0-700 mT. The selected concentrations of magnetic particles in a ferro-oil were 1, 2, 4, 6 and 8%.
Źródło:
Journal of KONES; 2013, 20, 2; 55-60
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermomechanical Properties of Vulcanized Rubber investigated by Testing Machine and Infrared Camera
Autorzy:
Staszczak, M
Pieczyska, E. A.
Maj, M.
Urbański, Ł.
Odriozola, I.
Martin, R.
Powiązania:
https://bibliotekanauki.pl/articles/114054.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
vulcanized rubber
self-healing polyurethane
tension test
thermo-mechanical couplings
temperature changes
infrared camera
Opis:
: Experimental results of effects of thermomechanical couplings occurring both in natural vulcanized rubber and rubber with self-healing polyurethane subjected to tension at different strain rates are presented. Mechanical characteristics were recorded by testing machine, while the sample temperature changes accompanying the deformation process was measured by infrared camera. The goal was to investigate influence of self-healing polyurethane on the rubber mechanical and thermomechanical properties. It was found that the introduction of the self-healing polyurethane ensures the higher elasticity and the lower tensile strength of the rubber. It was also confirmed that the material is very sensitive to the strain rate; the higher the strain rate, the higher the values of the stress and temperature increases have been obtained.
Źródło:
Measurement Automation Monitoring; 2015, 61, 6; 206-209
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An annual cycle of changes in water temperature as a cause of cracking in massive concrete hydraulic structures
Roczny cykl zmian temperatury wody jako przyczyna pękania w masywnych konstrukcjach betonowych budowli hydrotechnicznych
Autorzy:
Łydżba, D.
Różański, A.
Sobótka, M.
Powiązania:
https://bibliotekanauki.pl/articles/348677.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
budowla hydrotechniczna
elektrownia wodna
naprężenia cieplne
wpływ temperatury
HPP
hydropower plant
thermal stresses
temperature changes
failure criterion
Opis:
The paper deals with the problem of temperature effect on a massive concrete hydraulic structure. The article is split into two parts. In the first part is an investigation concerning temperature distribution in a concrete wall of a hydraulic structure due to annual changes in water temperature. The conclusion of these considerations is that the temperature distribution in the concrete element, due to slow annual changes in temperature of flowing water, is almost uniform in space. The advantage of this fact is taken into consideration in another part in which the results of a numerical analysis concerning a HPP on the Vistula river is presented. Final conclusion is that water temperature changes can easily cause cracking in concrete hydraulic structures.
W artykule rozważany jest wpływ temperatury na masywne konstrukcje betonowe obiektów hydrotechnicznych. Praca składa się z dwóch zasadniczych części. W pierwszej określany jest rozkład temperatury występujący w betonowej ścianie budowli wodnej na skutek rocznych, wolnych zmian temperatury wody. Wniosek z tych rozważań, tj. że rozkład temperatury wewnątrz elementu betonowego jest prawie jednorodny jest wykorzystany jako założenie w drugiej części pracy. Analizie numerycznej poddana jest jedna z elektrowni wodnych na Wiśle. Z przeprowadzonych obliczeń wynika, że zmiany temperatury wody, występujące w klimacie charakterystycznym dla Polski, mogą prowadzić do powstawania pęknięć w betonowych elementach budowli hydrotechnicznych.
Źródło:
AGH Journal of Mining and Geoengineering; 2012, 36, 2; 217-227
1732-6702
Pojawia się w:
AGH Journal of Mining and Geoengineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

    Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies