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Tytuł:
Lubricating oil properties – effect of using high acidity fuel
Autorzy:
Piaszyk, J.
Wyszynski, M. L.
Powiązania:
https://bibliotekanauki.pl/articles/133759.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
animal fat
tallow
lubricating oil
total acid number
TAN
total base number
TBN
thermogravimetric analysis
TGA
engine deposits
tłuszcz zwierzęcy
łój
olej smarowy
liczba kwasowa
liczba zasadowa
analiza termograwimetryczna
Opis:
This paper presents results of an investigation focusing on the effect of high acidity fuel (high TAN) on the properties of lubricating oil. The capability of the upgraded lubricating oil (increased TBN) to withstand an operation of the engine when fuelled with animal fat was checked. Two lubricating oils were compared. A thermogravimetric method is proposed for characterisation of deposits formed in the lubricating oil centrifuge.
Źródło:
Combustion Engines; 2013, 52, 3; 762-768
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermodynamic simulation comparison of opposed two-stroke and conventional four-stroke engines
Autorzy:
Shokrollahihassanbarough, F.
Alqahtani, A.
Wyszynski, M. L.
Powiązania:
https://bibliotekanauki.pl/articles/133447.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
opposed piston two-stroke engine
AVL Boost software
thermodynamic benefits
conventional crankshaft engines
silnik dwusuwowy
korzyści termodynamiczne
Opis:
Today’s technology leveraging allows OP2S (Opposed Piston 2-Stroke) engine to be considered as an alternative for the conventional four-stroke (4S) engines as mechanical drive in various applications, mainly in transportation. In general, OP2S engines are suited to compete with conventional 4-stroke engines where power-to-weight ratio, power-to-bulk volume ratio and fuel efficiency are requirements. This paper does present a brief advent, as well as the renaissance of OP2S engines and the novel technologies which have been used in the new approach. Also precise thermodynamic benefits have been considered, to demonstrate the fundamental efficiency advantage of OP2S engines. Hence, simulations of two different engine configurations have been taken into consideration: a one-cylinder opposed piston engine and two-cylinder conventional piston four-stroke engine. In pursuance of fulfilling this goal, the engines have been simulated in AVL Boost™ platform which is one of the most accurate Virtual Engine Tools, to predict engine performance such as combustion optimization, emission and fuel consumption. To minimize the potential differences of friction losses, the bore and stroke per cylinder are taken as constant. The closed-cycle performance of the engine configurations is compared using a custom analysis tool that allows the sources of thermal efficiency differences to be identified and quantified. As a result, brake thermal efficiency, power and torque of OP2S engine have been improved compared to conventional engines while emission concern has been alleviated.
Źródło:
Combustion Engines; 2015, 54, 3; 78-84
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermodynamic simulation comparison of AVL BOOST and Ricardo WAVE for HCCI and SI engines optimization
Autorzy:
Alqahtani, A.
Shokrollahihassanbarough, F.
Wyszynski, M. L.
Powiązania:
https://bibliotekanauki.pl/articles/133607.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
HCCI
homogeneous charge compression ignition
SI
numerical simulation
software platform
AVL BOOST
Ricardo WAVE
silnik wysokoprężny o spalaniu homogenicznym
silnik ZI
symulacja numeryczna
Opis:
The aim of this paper is to compare two simulation software platforms, AVL BOOSTTM and Ricardo WAVETM as used to simulate HCCI and SI GDI engines with the intention of maximising the engine’s efficiency and minimising the emissions. This paper compares these platforms in an experimentally validated model to analyse a spark ignition and a Homogeneous Compression Ignition Charge (HCCI) single cylinder 4 valve gasoline engines with multiple configurations and running parameters in order to find the most optimal set-up for the engine, with the prospect of allowing an optimum engine to be built and tested in real world conditions without the need for multiple expensive prototypes and long delays.
Źródło:
Combustion Engines; 2015, 54, 2; 68-72
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of the influences of blending different proportions of propane into methane on combustion characteristics at the knock threshold by using RCM
Autorzy:
Shokrollahi, F.
Wyszynski, M.
Sundell, J.-P.
Powiązania:
https://bibliotekanauki.pl/articles/244926.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
Rapid Compression Machine
knock threshold operating condition
peak driving pressure
knock intensity
Opis:
A spark-ignited Rapid Compression Machine (RCM) has been used to investigate the influences of the different proportions of methane-propane mixtures on the combustion characteristics at knock threshold operating condition. First, the threshold operating points of the mixtures have been obtained and the results indicated that the piston driving pressure reduces from 142 bars to 90 bars as the propane content in the mixture increases. As a spark plug was fitted in this RCM, the optimum spark timing was also investigated. It was established that spark timing should be set synchronize with the piston at TDC, due to the free movement of the piston. In most RCMs, piston can move toward TDC following the equilibria of forces due to the absence of con-rod. Finally, knock intensity of the different mixtures has been studied. Pre-heating system in RCM with and without trace heating system; effects of flow-rate and lambda variations on peak pressure, ignition delay time and ARR; threshold operating conditions of pure methane, 90% methane and 10% propane, 80% methane and 20% propane, 70% methane and 30% propane; effect of driving pressure on the knocking intensity for mixture of methane and propane for heavy and light knockings are presented in the article.
Źródło:
Journal of KONES; 2018, 25, 1; 339-346
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation into the effect of bore/stroke ratio on a single cylinder two stroke opposed piston engin
Autorzy:
Alqahtani, A. M.
Wyszynski, M. L.
Mazuro, P.
Powiązania:
https://bibliotekanauki.pl/articles/245226.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
opposed-piston
two-stroke
AVL Boost
thermodynamic modelling
Opis:
Opposed-piston (OP) engine’s promising fuel efficiency has attracted the interest of automotive industry in the recent years. The opposed-piston two-stroke (OP2S) engine technology heightens this fuel efficiency benefit and offers advances in structure, power density and thermal efficiency whilst sustaining its lower cost and weight. Today thermodynamic modelling remains an indispensable and cost effective route in the development and optimisation of internal combustion engines (ICEs). To achieve this goal, the OP2S engine is simulated and validated against experimental results in AVL Boost™, which is hailed as one of the most reliable and advanced engine simulation tools. Detailed analyses of the piston dynamics, heat release, scavenging and heat transfers are highlighted in discrete sections of this paper. Having compared distinct heat release models, the Wiebe 2-Zone model emerged efficacious in replicating the heat release characteristics of the PAMAR™ engine. In comparing the numerical and experimental results, the simulation revealed minimal differences in peak pressure, peak temperature and maximum pressure raise rate, under ±2.5% differences for indicated power, IMEP, indicated thermal efficiency (ITE) and ISFC. Subsequently, confidence taken from the validated numerical model is then deployed to investigate the effect of stroke-to-bore (S/B) ratio on OP2S performance. Three combinations of S/B ratios (0.5, 1.25, and 1.69) with identical swept volume are analysed in this study. Utilisation of the validated model ensured the standardisation of intake, exhaust and the combustion systems in order to isolate the effects of S/B ratio. Results indicate that heat losses decrease with increasing S/B ratio because of the reduced surface area-to-volume in the cylinder. Consequently, an improvement in ITE and mechanical efficiency is observed with reduced ISFC for higher S/B ratios. A tendency of upsurge in combustion efficiency is also evident for higher S/B ratio due to reduced heat transfer near minimum volume of the combustion chamber.
Źródło:
Journal of KONES; 2016, 23, 2; 9-16
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of unmanned aerial vehicles (drones) to determine the shoreline of natural watercourses
Wykorzystanie bezzałogowych statków latających (dronów) do ustalania linii brzegowej cieków naturalnych
Autorzy:
Wilkowski, W.
Lisowski, M.
Wyszyński, M.
Wierzbicki, D.
Powiązania:
https://bibliotekanauki.pl/articles/292459.pdf
Data publikacji:
2017
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
image classification
orthophotomap
Shoreline
unmanned aerial vehicle
bezzałogowy statek latający (dron)
klasyfikacja obrazu
linia brzegowa
ortofotomapa
Opis:
The aim of the paper was to study the possibility of using unmanned aerial vehicles (drones) to determine the shoreline of natural watercourses. According to the Water Law, the shoreline is defined by: the edge of the shore if it is visible, and in other cases it is the boundary of persistent grass growth, or the line, which is determined on the basis of the average water level of a period of at least 10 years. The study included an analysis of the possibility of determining the shore line in all of these cases, using aerial photos obtained from an unmanned aerial vehicle (drone) on a particular stretch of the river Narew. In order to determine the shoreline defined by the edge of the shore, a point cloud together with the necessary GIS tools were used to generate planes which then made it possible to determine that edge. Defining the shoreline using this method was done with an accuracy of ±0.21 m. The study shows that the best results for determining the shoreline were obtained using either the edge of the shore or the line, which is determined according to the average water level of a period of at least 10 years. Due to the very ambiguous course of the shoreline defined by the boundary of persistent grass growth, it would be advisable to eliminate this remove from the Water Law.
Celem pracy było określenie możliwości wykorzystania bezzałogowych statków latających (dronów) do ustalania linii brzegowej cieków naturalnych. Z ustawy „Prawo wodne” wynika, że granicę linii brzegu stanowią: krawędź brzegu, jeżeli jest wyraźna, a w pozostałych przypadkach granica stałego porastania traw, albo linia, którą ustala się według średniego stanu wody z okresu co najmniej 10 lat. Badaniami objęto możliwości określenia linii brzegu we wszystkich przypadkach, wykorzystując zdjęcia lotnicze wykonane z bezzałogowego statku latającego (drona) na określonym odcinku Narwi. W celu określenia linii brzegowej wyznaczonej przez krawędź brzegu wykorzystano chmurę punktów oraz narzędzia do wygenerowania płaszczyzn, z których wyznaczono tę krawędź. Uzyskano dokładność wyznaczenia tą metodą linii brzegowej, wynoszącą ±0,21 m. Z przeprowadzonych badań wynika, że najlepsze rezultaty uzyskano, wyznaczając linię brzegu, gdy linię tę stanowi krawędź brzegu, lub linię średniego stanu wody z okresu co najmniej 10 lat. Ze względu na bardzo niejednoznaczny przebieg granicy linii brzegu wyznaczonej jako linia stałego porastania traw, celowe byłoby wyeliminowanie tego kryterium z zapisu ustawy „Prawo wodne”.
Źródło:
Journal of Water and Land Development; 2017, 35; 259-264
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computational modelling of the fuel injection and combustion in a Diesel K6 rotary engine
Autorzy:
Mason, M.
Wyszyński, M. L.
Jordan, O.
Gibson, D.
Powiązania:
https://bibliotekanauki.pl/articles/243793.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engine
combustion process
combustion factors
fuel injection
ANSYS Fluent code
Opis:
This paper outlines the methods and results of computations completed using the ANSYS Fluent code modelling the fuel injection and combustion within the K6 engine, a new form of rotary engine in which the fuel is injected in an arc across the top of the cylinder. The model uses the DPM Model in conjunction with a dynamic mesh and non-premixed combustion models to treat the injection as liquid diesel evaporating to C12H23. The outcomes of this model are presented in images displaying the distribution of temperature, and fuel and CO2 concentrations. The limitations pertaining to the maximum injection angles are also studied. The simulation is found to be effective and the results suggestive of successful, clean and complete combustion while presenting some matters, which require further investigation. The article presents temperature within the combustion chamber at various crank angle degrees, ) velocity of fluid within the combustion chamber, effects of impingement with injector offset on temperature and fuel concentration, fuel concentration demonstrating impingement, in cylinder temperature curve.
Źródło:
Journal of KONES; 2018, 25, 4; 263-276
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bio-ketones from lignocellulosic biomass: experimental investigation on fuel properties, combustion and emissions characteristics of cyclopentanone blend with diesel in compression ignition engine
Autorzy:
Doustdar, O.
Wyszynski, M. L.
Tsolakis, A.
Mahmoudi, H.
Powiązania:
https://bibliotekanauki.pl/articles/133067.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
lubricity
viscosity
calorific value
diesel engine
cyclopentanone
emission
smarność
lepkość
wartość opałowa
silnik spalinowy
cyklopentanon
emisja
Opis:
Use of alternative fuels in compression ignition engines is the topic for many studies. This paper presents the results of lubricity, calorific value, viscosity, surface tension and density of a ketone blend with diesel to use as a fuel in compression ignition engine. Analyses of fuel properties are vital due to their effect on fuel system. In addition, this study is related to the development of future biofuels and it indicates the effect of oxygen double bond in molecular structure of ketones on important fuel properties. Cyclopentanone which has cyclic molecular structure was used; it can be produced from lignocellulosic biomass through various processing ways. This ketone was blended with diesel fuel at 10% vol. Results from fuel properties tests were compared to the conventional diesel fuel. In the next step this blend was tested in a research diesel engine to analyse its combustion behaviour and emission characteristics of exhaust gases; these results were compared with ultra-low sulphur diesel fuel. Results showed that cyclopentanone, as an additive to diesel, improved surface tension and density of the fuel but in contrast had negative effect on viscosity, lubricity and calorific value of the fuel, but still in the standard range. Combustion behaviour of this fuel in the diesel engine also showed longer ignition delay of ketone blend and also that gaseous emission such as CO and THC are higher than from diesel fuel and NOx emission is less than from conventional diesel fuel combustion.
Źródło:
Combustion Engines; 2017, 56, 4; 81-86
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the effect of variable compression ratios performance on opposed piston 2-stroke engine
Autorzy:
Alqahtani, A.
Wyszynski, M. L.
Mazuro, P.
Xu, H.
Powiązania:
https://bibliotekanauki.pl/articles/133658.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
opposed-piston
AVL BOOST
VCR
compression ratio
numerical simulation
tłok przeciwbieżny
stopień sprężania
symulacja numeryczna
Opis:
Numerous skills involving the introduction of (OP) opposed piston engine have been developed in the recent past. Indeed, novel techniques can help to improve the performance of the engine. The aim of this paper is to model and simulate a simple single-cylinder two-stroke opposed-piston engine and minimise fuel consumption and heat loss, using the software programme AVL BOOST™. AVL BOOST is an engine modelling software, which analyses the performance of a modelled single cylinder two-stroke opposed-piston engine by changing desired parameters. In order to meet this aim, experimental results from a unique engine are used to make a comparison with the results obtained from AVL BOOST model. Six combinations of compression ratios (12, 13.5, 15, 16.5, 18 and 19.5) are analysed in this study with the engine speed running at 420 rpm and 1500 rpm. In addition to the compression ratios, the effect of stroke-to-bore (S/B) ratios on OP2S performance is investigated. Various values of S/B ratios, whilst maintaining a constant swept volume, port geometry and combustion timing, and their effect on fuel consumption and heat loss are analysed in this study. A comparison between the two engine speeds with increasing combinations of compression ratios, and the S/B ratios revealed minimal differences in peak pressure, peak temperature, IMEP, ISFC, indicated efficiency and total heat loss. Detailed analyses of these parameters are highlighted in discrete sections of this paper.
Źródło:
Combustion Engines; 2017, 56, 4; 97-106
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cycle-to-cycle variations of a diesel engine operating with palm biodiesel
Autorzy:
Yasin, M. H.
Mamat, R.
Abdullah, A. A.
Abdullah, N. R.
Wyszynski, M. L.
Powiązania:
https://bibliotekanauki.pl/articles/950092.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
cycle-to-cycle variations
biodiesel
combustion
diesel engine
Opis:
Biodiesel is one of biodegradable and renewable fuel, which is originated from vegetable oil or animal fats. Different fuel properties of biodiesel produce different combustion characteristics which slightly differ to mineral diesel. Combustion studies on palm-biodiesel and mineral diesel were conducted using a multi-cylinder diesel engine operating at medium engine load at 2500 rpm. The engine was water cooled inline four cylinder diesel engines without exhaust gas recirculation system. Cycle-to-cycle variations of peak cylinder pressure and mean indicated pressure of the test fuels were determined for the combustion characteristics of diesel engine. In-cylinder pressure data for the 200 consecutive cycles were determined using a Kistler pressure transducer and recorded into a combustion analyser. Three different engine loads: 20%, 40% and 60% were selected in this study with a constant engine speed of 2500 rpm. The results show that at lower load, in-cylinder pressure variations for palm biodiesel were lower compared to mineral diesel. However, at medium and high loads, palm biodiesel has dominated the peak cylinder variations. Different combustion cyclic variations for mineral diesel and B100 are observed and generally influenced by psychochemical properties differences including viscosity and density of fuel.
Źródło:
Journal of KONES; 2013, 20, 3; 443-450
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of injection pressure and strategy in a Jaguar V6 diesel engine
Autorzy:
Abdullah, N. R.
Mamat, R.
Rounce, P.
Wyszynski, M. L.
Tsolakis, A.
Xu, H. M.
Tian, G.
Powiązania:
https://bibliotekanauki.pl/articles/242414.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion
emissions
injection strategies
premixed combustion
ignition delay
Opis:
In recent years, the improvement of engine performance and emissions has become an extremely important concern. This study focuses on the injection strategy based on the injection pressure (IP) and duration between pilot injection and the main injection (dMI) using a multi cylinder common rail multiple injections diesel engine. The study was designed to produce improvements in fuel mixing via the injection strategy, to reduce the main ignition delay. This would contribute to a minimum amount of fuel burnt in the premixed combustion phase, leading to a reduction in emissions. Recent evidence shows that premixed combustion is significant in the controlling of emissions of nitrogen oxides (NOx) and soot. Six different IPs combined with a short and long dMI were compared in the attempt to improve engine performance and emissions. The engine performance was measured in terms of brake specific fuel consumption, ignition delay, heat release and peak in-cylinder pressure and emissions, specifically nitrogen oxides (NOx), total unburned hydrocarbons (THC), carbon monoxide (CO) and smoke emissions for each engine test condition. The evidence from this study shows that the effect of IP is more dominant than dMI in terms of peak cylinder pressure, heat release, brake specific fuel consumption and emissions. However, the dMI shows a strong effect at a higher engine speed.
Źródło:
Journal of KONES; 2009, 16, 2; 9-22
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation into particulate size distributions in the exhaust gas of diesel engines fuelled with biodiesel blends
Autorzy:
Chuepeng, S.
Theinnoi, K.
Xu, H. M.
Wyszynski, M. L.
York, A. P. E.
Hartland, J. C.
Qiao, J.
Powiązania:
https://bibliotekanauki.pl/articles/248072.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
biodiesel
PM
combustion
diesel
PM size distribution
Opis:
Particulate matter (PM) size distributions in the exhaust gas of biodiesel blend fuelled diesel engines have been studied by experimenting firstly on a single cylinder equipped with a pump-line-injector injection system and secondly for comparison on a V6 DI engine equipped with a common rail fuel injection system. Both engines were operated with a biodiesel (RME) blend of B30 and ultra low sulphur diesel fuel (ULSD). Several engine load conditions with and without exhaust gas recirculation (EGR) were selected. Particulate number concentrations vs. the electrical mobility equivalent diameter were examined using a fast differential mobility spectrometer. The effect of engine operating conditions including EGR rates on particulate emissions has been investigated. It is found that PM sizes from combustion of B30 without EGR operation are generally smaller than those from ULSD while number concentrations are higher. This can result in lower PM mass estimates for the B30 case if due care is not taken. When EGR is applied to control nitrogen oxides emissions, both the total PM number and mass are increased and shifted toward the larger sizes for both fuels used in the test. The calculated total PM mass from B30 combustion is lower than in the ULSD case for all the tested engine operating conditions.
Źródło:
Journal of KONES; 2008, 15, 3; 75-82
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance of a drop-in biofuel emulsion on a single-cylinder research diesel engine
Autorzy:
Bogarra-Macias, M.
Doustdar, O.
Fayad, M. A.
Wyszyński, M. L.
Tsolakis, A.
Ding, P.
Pacek, A.
Martin, P.
Overend, R.
O'Leary, S.
Powiązania:
https://bibliotekanauki.pl/articles/133126.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
pyrolysis oil
emulsion
wood pyrolysis
engine testing
olej popirolityczny
emulsja
piroliza drewna
badania silnika
Opis:
Current targets in reducing CO2 and other greenhouse gases as well as fossil fuel depletion have promoted the research for alternatives to petroleum-based fuels. Pyrolysis oil (PO) from biomass and waste oil is seen as a method to reduce life-cycle CO2, broaden the energy mix and increase the use of renewable fuels. The abundancy and low prices of feedstock have attracted the attention of biomass pyrolysis in order to obtain energy-dense products. Research has been carried out in optimising the pyrolysis process, finding efficient ways to convert the waste to energy. However, the pyrolysis products have a high content in water, high viscosity and high corrosiveness which makes them unsuitable for engine combustion. Upgrading processes such as gasification, trans-esterification or hydro-deoxynegation are then needed. These processes are normally costly and require high energy input. Thus, emulsification in fossil fuels or alcohols is being used as an alternative. In this research work, the feasibility of using PO-diesel emulsion in a single-cylinder diesel engine has been investigated. In-cylinder pressure, regulated gaseous emissions, particulate matter, fuel consumption and lubricity analysis reported. The tests were carried out of a stable non-corrosive wood pyrolysis product produced by Future Blends Ltd of Milton Park, Oxfordshire, UK. The product is trademarked by FBL, and is a stabilized fraction of raw pyrolysis oil produced in a process for which the patent is pending. The results show an increase in gaseous emissions, fuel consumption and a reduction in soot. The combustion was delayed with the emulsified fuel and a high variability was observed during engine operation.
Źródło:
Combustion Engines; 2016, 55, 3; 9-16
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Plonowanie i jakość ziarna jęczmienia nieoplewionego w zależności od terminu siewu i poziomu nawożenia azotem
Yielding and quality of naked barley grain depending on sowing date and nitrogen level
Autorzy:
Gozdowski, D.
Wyszyński, Z.
Kalinowska-Zdun, M.
Powiązania:
https://bibliotekanauki.pl/articles/10570597.pdf
Data publikacji:
2004
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
jeczmien nagoziarnisty
masa 1000 ziaren
dawki nawozowe
plonowanie
ziarno
liczba klosow
jakosc
jeczmien Rastik
terminy siewu
uprawa roslin
jeczmien jary
zawartosc bialka
nawozenie azotem
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura; 2004, 59, 2; 931-940
0365-1118
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Visualizing bivariate relationships with hexagonally binned data
Wizualizacja dwuwymiarowych zależności przy pomocy danych pogrupowanych sześciokątnie
Autorzy:
Kozak, M.
Wnuk, A.
Gozdowski, D.
Wyszyński, Z.
Powiązania:
https://bibliotekanauki.pl/articles/9701.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Katedra Zastosowań Matematyki i Informatyki
Źródło:
Colloquium Biometricum; 2010, 40
1896-7701
Pojawia się w:
Colloquium Biometricum
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 21

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