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Tytuł:
The Likelihood of a failure of a damming structure
Autorzy:
Opyrchał, L.
Hrabowski, W.
Jankowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/241512.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:
failure risk
dam
Opis:
Having an analysis of real breakdowns and damages in Polish damming structures as a basis, and assuming the probability of controlling freshet as a unit, one can calculate the probability of failure of a hydro-technical structure, due to failure of the base, the draining system, anti-filtering safety appliances, the body or the abutments. The results obtained af-ford an estimation of failure risk at any moment of the structure's opera-tion and an estimation of the overall failure probability. The calculations were carried out for all dam classes. When the dam's elements are in good condition, the overall failure probability is by one order of magni-tude greater than the probability that a controlling freshet will occur.
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2003, 50, 2; 141-146
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of the Bayesian Belief Nets in dam safety monitoring
Zastosowanie sieci Bayesa w monitoringu bezpieczeństwa zapór wodnych
Autorzy:
Miroslaw-Swiatek, D.
Kemblowski, M.
Jankowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/81845.pdf
Data publikacji:
2012
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Opis:
The systems for earth dam monitoring should enable measurements of basic physical parameters describing the behavior of the structure, including: soil water pressure, soil stress, displacements, leaks, and drainage discharges. In the case of earth dam safety assessment, the monitoring data are used to detect any anomalies in dam behavior. In this paper, the dam safety has been analyzed using the Bayesian Nets. Two types of information: water pressure measurements and drainage discharge measurements are used in analyses. The seepage anomalies in the Klimkówka Dam were considered in demonstrate the practical advantages of using the Bayesian Nets for monitoring data interpretation. Presented examples of the Bayesian Nets applications (forward and backward propagation) in analysis of seepage through earth dams show that this method can be an effective tool supporting an assessment of dams technical condition and monitoring of the dam safety.
Systemy monitorowania zapór ziemnych powinny umożliwiać pomiar podstawowych parametrów fizycznych opisujących zachowanie się konstrukcji. Do podstawowego monitoringu należą pomiary piezometryczne, pomiar przemieszczeń, wydatki w drenażach, obserwacje przecieków. W przypadku zapór ziemnych dane z monitoringu stosowane są w celu wykrycia anomalii w zachowaniu się obiektu. W niniejszej pracy w ogólny sposób zaprezentowano możliwość wykorzystania sieci Bayesowskich do analizy bezpieczeństwa zapory wodnej w oparciu o monitoring piezometryczny i obserwacje wydatków w drenażu. Na przykładzie zapory Klimkówka pokazano możliwość zastosowania wnioskowania w przód i wstecz w celu poznania przyczyn nieprawidłowości w przebiegu filtracji. Omówione przykłady analizy wskazują, że sieci Bayesowskie mogą być skutecznym narzędziem wspomagającym ocenę stanu technicznego zapór.
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation; 2012, 44, 1
0208-5771
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of process parameters on combustion of plastic waste in the fluidized bed reactor
Autorzy:
Jankowski, D.
Żukowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/778547.pdf
Data publikacji:
2013
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
plastics
fluidization
combustion
thermal decomposition
polymers
fluidized bed reactor
municipal waste
waste utilization
fluidized bed
Opis:
The paper presents the results of a research on the effects of process parameters on the combustion of waste plastics. The experiments were carried out in a laboratory fluidized bed reactor. The temperature and the conditions of the process were changed during the experiments. The plastics were combusted continuously (autothermally), periodically with extra fuel (co-firing) and alone in a hot fluidized bed. During the combustion process of materials containing nitrogen (PA, ABS), while the bed temperature decrease, changes of emissions of nitrogen oxides, in particular an increase in the concentration of N2O, up to 250 ppm at ~730°C, were observed. During ABS combustion, emission of HCN was registered, at a maximum of 400 ppm. The presence of the supporting fuel (LPG) resulted in the stabilization and acceleration of the plastic samples degradation process. The rate of thermal decomposition of waste materials depended on its elemental composition and also the physicochemical properties.
Źródło:
Polish Journal of Chemical Technology; 2013, 15, 4; 75-79
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Novel catalytic converter oxide for SI engines
Autorzy:
Jankowski, A.
Kruczynski, S. W.
Powiązania:
https://bibliotekanauki.pl/articles/246162.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engines
ecology
exhaust emission
lean mixtures
catalytic converters
Opis:
Subject of the paper are converters of lean mixtures for SI engines with a good efficiency of NOx reduction. Investigation of new effective catalytic materials having good sorptive proprieties of nitrogen oxides and simultaneously resistant on the thermal destruction and chemical destruction are main aim of the paper. The operating idea of such converters and conditions of their work are also presented. Main objective of the paper is performance of the new reactor of the Pt/Rh-MgO/CeO2/Al2O3 formula. The magnesium oxide MgO is here an absorber of nitrous oxides and has an essential feature, it is resistant on sintering. Such reactor can be the alternative for generally applied converters containing the barium oxide. Experimental results of catalytic converter containing various quantities of magnesium oxide for SI engines with lean mixtures are presented in the paper. Researches involved both laboratory and engine tests. The laboratory researches concern the topography active surface of the reactor with the scanning electron microscopy) method. Size of platinum and rhodium crystallites obtainedfrom the Scherrer dependence analyzing the diffractive spectrum of the X-radiation (XRD) was about 5 nm. Moreover method covering of reactor's active layers on the metal- monolith is presented. Engine researches comprised CO, THC, and NOx conversion for two engines in conditions of lean (A/F=20.0), reach (A/F=14.0), and stoichiometric (A/F=14.7) mixtures. CO, THC, and NOx conversion were stated in the dependence of temperature catalytic process in conditions of the various mixtures.
Źródło:
Journal of KONES; 2010, 17, 1; 177-186
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of sulfur on the quality of winter rape seeds
Siarka a jakosc nasion rzepaku ozimego
Autorzy:
Jankowski, K
Budzynski, W.
Szymanowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/14517.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
rape
winter rape
rapeseed
winter rapeseed
sulphur fertilization
fertilization
rapeseed quality
crude fat
total protein
glucosinolate
fertilizer rate
Opis:
The paper presents the results of three-year (2000-2003) experiments to determine the effect of the date of sulfur application (fall + spring or spring only) and the fertilizer rate (0, 30, 60, 90 kg⋅ha-1) on the usability of winter rape seeds. The pre-sowing and the spring rates of sulfur as well as the rate applied entirely in the spring did not lead to significant variations in crude fat concentrations, but a clear tendency towards an increase in the total protein content was observed in rape seeds. A one-way increase was reported to the level of 60 kg S⋅ha-1. An increase in the sulfur rate (regardless of the date of application) to 90 kg⋅ha-1 raised the concentrations of alkene glucosinolates, mainly gluconapin and progoitrin, and – to a lesser degree – of indole glucosinolates, mainly 4-hydroxyglucobrassicin, in rape seed cv. Lisek. The splitting of the total sulfur rate into two rates (fall + spring) caused a higher increase in the concentrations of gluconapin, progoitrin and 4-hydroxyglucobrassicin than a single rate application in the spring.
W pracy przedstawiono 3-letnie (2000-2003) wyniki badań nad wpływem terminu aplikacji siarki (jesień + wiosna lub tylko wiosna) i poziomu dawki (0, 30, 60, 90 kg·ha-1) na wartość użytkową nasion rzepaku ozimego. Siarka aplikowana przedsiewnie i wiosną oraz wyłącznie wiosną nie różnicowała istotnie zawartości tłuszczu surowego, powodując jednak wyraźną tendencję do wzrostu zawartości białka ogółem w nasionach. Przyrost ten był jednokierunkowy do dawki 60 kg S·ha-1. Zastosowanie siarki (niezależnie od terminu zabiegu) aż do dawki 90 kg na 1 ha powodowało w nasionach odmiany Lisek przyrost zawartości głównych glukozynolanów alkenowych — glukonapiny i progoitryny, a w mniejszym stopniu indolowych, tj. 4-hydroksyglukobrassicyny. Warto podkreślić, iż podział dawki siarki na cześć jesienną i wiosenną w większym stopniu wpływał na zwiększenie zawartości progoitryny, glukonapiny oraz 4-hydroksyglukobrassicyny niż jednokrotna wiosenna aplikacja tego składnika.
Źródło:
Journal of Elementology; 2008, 13, 4; 521-534
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lawn colours in the aspect of hydrogel and mineral fertilizers applied
Kolorystyka muraw trawnikowych w aspekcie zastosowanego hydrożelu i nawozów mineralnych
Autorzy:
Jankowski, K.
Jankowska, J.
Czeluscinski, W.
Powiązania:
https://bibliotekanauki.pl/articles/47321.pdf
Data publikacji:
2012
Wydawca:
Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydawnictwo PB
Opis:
The aim of this study was to determine the effect of hydrogel and mineral fertilizers on the lawn turf colour. Lawn experiment was conducted in the years 2002- -2004 on experimental plots in the system of randomized blocks with an area of 4 m2 (4 x 1 m) in four replications. In the conducted research experiment, the following factors were applied: botanical composition of lawn: Wembley (M1), Park (M2), Relax (M3), Półcień (M4); kind of subsoil: with the addition of hydrogel Aqua-Gel P4 (H), without the addition of hydrogel Aqua-Gel P4 (BH); type of fertilizer: Pokon (N1), Trawovit set (N2), Azofoska (N3), proposed fertilizer (N4). Each year of the study the lawn colours were evaluated. This evaluation was made according to the COBORU methodology [Domański 1992]. It was used valuation 9o scale, where 9 meant the highest value of this feature. The colours of tested turfs to a large extent were dependent on meteorological conditions, especially the temperature and rainfall, which was confirmed in a different turf colour in each month of the growing periods. The mixture Wembley (M1) with 80% share of perennial ryegrass was characterized by the most intensive green colouration. With the decreasing of the percentage of perennial ryegrass in the mixture (irrespective of the type of substrate) the turf colouration deteriorated to the green grass colour. In subsequent years of research, intensity of the mixtures, colour slightly decreased from brown green colour (about 8o) to the pure green (about 6o). Applying hydrogel and proposed fertilizer to a small degree improved lawn colouration. The other fertilizers had no effect on turf colour.
Celem pracy było określenie wpływu hydrożelu i nawozów mineralnych na kolorystykę muraw trawnikowych. Doświadczenie trawnikowe prowadzono w latach 2002-2004 na poletkach doświadczalnych Katedry Łąkarstwa i Kształtowania Terenów Zieleni Uniwersytetu Przyrodniczo-Humanistycznego w Siedlcach w układzie losowanych bloków, o powierzchni poletka 4 m2, w czterech powtórzeniach. Zastosowano następujące czynniki badawcze: rodzaj mieszanki trawnikowej: Wembley (M1), Parkowa (M2), Relax (M3), Półcień (M4); rodzaj podłoża: z dodatkiem hydrożelu Aqua- Gel P4 (H), bez dodatku hydrożelu Aqua-Gel P4 (BH) oraz rodzaj nawozu: Pokon (N1), Trawovit Komplet (N2), Azofoska (N3), nawóz autorski (N4). W każdym roku badań oceniano kolorystkę trawników według metodyki COBORU [Domański 1992]. Stosowano 9o skalę bonitacyjną, w której 9 oznaczało najwyższą wartość cechy. Kolorystyka badanych muraw trawnikowych w dużym stopniu zależała od przebiegu warunków meteorologicznych, a zwłaszcza od rozkładu temperatury i ilości opadów (stwierdzono zróżnicowane zabarwienie muraw w poszczególnych miesiącach kolejnych okresów wegetacyjnych). Najbardziej intensywnym zielonym zabarwieniem odznaczała się mieszanka Wembley (M1) z 80% udziałem życicy trwałej. W miarę zmniejszania się procentowego udziału życicy trwałej w mieszankach, niezależnie od rodzaju podłoża, pogarszała się kolorystyka muraw aż do uzyskania barwy trawiastozielonej. W kolejnych latach badań intensywność zabarwienia badanych mieszanek trawnikowych ulegała nieznacznemu pogorszeniu – od zieleni brunatnozielonej (ok. 8o) do czystej (ok. 6o). Stosowanie hydrożelu i nawozu autorskiego w niewielkim stopniu poprawiało kolorystykę trawników. Pozostałe nawozy nie miały wpływu na barwę murawy.
Źródło:
Acta Scientiarum Polonorum. Agricultura; 2012, 11, 1
1644-0625
Pojawia się w:
Acta Scientiarum Polonorum. Agricultura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of phase diagrams and thermoseparation behaviour of aqueous two-phase systems composed of ethylene oxide-propylene oxide random copolymer and potassium phosphate
Autorzy:
Dembczyński, R.
Białas, W.
Jankowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/185795.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wodne układy dwufazowe
termoseparacja
współczynnik podziału
partition coefficient
aqueous two-phase systems
phase diagrams
thermoseparation
ethylene oxide-propylene oxide copolymers
Opis:
The application of aqueous two-phase systems (ATPS) is a cost-effective and simple method of protein separation (including enzymes) from complex systems. The first stage of designing the protein purification process in an ATPS involves the identification of the conditions for the formation of a given extraction system. For this purpose, the conditions for the formation of ATPSs in a thermoseparating EO50PO50 polymer/potassium phosphates system have been studied. Factors determining the ATPS formation comprised: separation temperature (4[degrees]C or 20[degrees]C), phosphate solution pH (6, 7.5 or 9) as well as the concentration of NaCl introduced into the systems (0.085 M, 0.475 M and 0.85 M). ATPS without NaCl were prepared as well. The conditions for the formation of the primary EO50PO50/potassium phosphate ATPS were determined with their phase diagrams. It was observed that with an increase of phosphate pH and NaCl concentration in the system, there was a decrease of the EO50PO50 and phosphate concentrations necessary to form a primary ATPS. After the primary two-phase separation, the top phase (rich in the EO50PO50 polymer) was partitioned from the bottom phase (rich in phosphates). Next, by means of polymer phase thermoseparation, a secondary two-phase system was formed. In the secondary EO50PO50/phosphate ATPS, the bottom phase was formed by the concentrated EO50PO50 polymer (30-80% concentration), while the top phase by a solution composed mainly of water, containing phosphate ions and remains of EO50PO50 polymer (3-7%).
Źródło:
Chemical and Process Engineering; 2012, 33, 3; 411-429
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modal analysis of real timber frame houses with different insulation materials
Autorzy:
Szczepański, M.
Migda, W.
Jankowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/101994.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
timber frame house
earthquake resistance
dynamic
numerical model
modal analysis
Opis:
The aim of this article is to present the results of a numerical modal analysis of two actual structures of timber frame buildings and the different behaviour due to the used insulation material. One model of the timber structure was filled with mineral wool, while the other with polyurethane foam. During the modal analysis, eigenvalues for both models have been determined. The results of the analysis clearly show the increase of stiffness and damping properties of skeletal constructions achieved by the use of polyurethane foam as the skeleton filling. The numerical model was based on prior experimental test on real scale single frame elements, therefore the result can be assumed to be adequate.
Źródło:
Advances in Science and Technology. Research Journal; 2016, 10, 31; 215-221
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Construction technology of timber-frame houses resistant to dynamic loads – study on models of exterior walls
Autorzy:
Szczepanski, M.
Migda, W.
Jankowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/102257.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
timber frame house
exterior wall
numerical model
dynamic loads
Opis:
The aim of this paper is to show the numeric representation of experimental studies concerning the behaviour of exterior wall models of a timber-frame house under harmonic loading. A single wall model according to traditional technology of timber-frame house walls (filling with mineral wool) was tested. The analysis was conducted for the following frequencies: 0.5 Hz, 1.0 Hz, 2.0 Hz and 5.0 Hz for various values of the specified displacement. A number of hysteresis loops were obtained for each of the tests. Based on them, the damping ratio as well as stiffness were calculated. The skeleton model filled with mineral wool (traditional technology) experienced serious damage under larger displacements. The results of the study have been used to propose a numerical model of wall filled with mineral wool. The proposed numerical model is consistent with the results for the values obtained during the experimental study, which proves the correctness of the adopted solution.
Źródło:
Advances in Science and Technology. Research Journal; 2015, 9, 28; 75-80
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Timber-frame house resistant to dynamic loads - analysis of wall panel filled with polyurethane foam
Autorzy:
Szczepański, M.
Migda, W.
Jankowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/127669.pdf
Data publikacji:
2016
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
timber frame house
earthquake resistance
dynamic loads
numerical model
konstrukcje drewniane szkieletowe
odporność na ruchy tektoniczne
obciążenia dynamiczne
model numeryczny
Opis:
The present study shows the experimentally and numerically determined response of a single timber-frame house wall panel filled with polyurethane (PU) foam under dynamic loads. The harmonic tests were conducted for the following frequencies: 0.5 Hz, 1.0 Hz, 2.0 Hz and 5.0 Hz for various values of the specified displacement. Based on the results of the comparison between the experimental tests and the numerical analyses, the numerical model has been verified to be correct. The model can be used in further analyses so as to investigate the behaviour of the whole building under dynamic loads, including seismic and paraseismic excitations. Using such a numerical model, it will be possible to evaluate the improvement in resistance against dynamic loads for the case when PU foam is used instead of mineral wool.
Źródło:
Vibrations in Physical Systems; 2016, 27; 347-354
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical Model of Directional Radiation Pattern Based on Primary Antenna Parameters
Autorzy:
Jankowski-Mihułowicz, P.
Lichoń, W.
Węglarski, M.
Powiązania:
https://bibliotekanauki.pl/articles/226192.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
antenna
directional radiation pattern
modelling
radiocommunication
Opis:
The new numerical model of directional radiation pattern, in which part of energy is emitted in side and back lobs, has been presented in this paper. The model input values are determined on the base of primary parameters that can be read from the datasheet of used antennas. The special software tool NmAntPat has been elaborated to carry out the described task. The elaborated model, program and output files can be easily implemented into an analysis of radio wave propagation phenomenon in any algorithms and numerical calculations. The comparison of the graphical plots that have been obtained on the base of measurements, producers’ data specification notes and modelling results confirms the model correctness.
Źródło:
International Journal of Electronics and Telecommunications; 2015, 61, 2; 191-197
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modal Analysis of a Steel Radial Gate Exposed to Different Water Levels
Autorzy:
Brusewicz, K.
Sterpejkowicz-Wersocki, W.
Jankowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/241116.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:
modal analysis
radial gate
dynamic loads
Opis:
With the increase in water retention needs and planned river regulation, it might be important to investigate the dynamic resistance of vulnerable elements of hydroelectric power plants, including steelwater locks. The most frequent dynamic loads affecting hydroengineering structures in Poland include vibrations caused by heavy road and railway traffic, piling works and mining tremors. More destructive dynamic loads, including earthquakes, may also occur in our country, although their incidence is relatively low. However, given the unpredictable nature of such events, as well as serious consequences they might cause, the study of the seismic resistance of the steel water gate, as one of the most vulnerable elements of a hydroelectric power plant, seems to be important. In this study, a steel radial gate has been analyzed. As far as water gates are concerned, it is among the most popular solutions because of its relatively small weight, compared to plain gates. A modal analysis of the steel radial gate was conducted with the use of the FEM in the ABAQUS software. All structural members were modelled using shell elements with detailed geometry representing a real structure.Water was modelled as an added mass affecting the structure. Different water levels were used to determine the most vulnerable state of the working steel water gate. The results of the modal analysis allowed us to compare the frequencies and their eigenmodes in response to different loads, which is one of the first steps in researching the dynamic properties of steel water gates and their behaviour during extreme dynamic loads, including earthquakes.
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2017, 64, 1; 37-47
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research of water - fuel microemulsions as fuel for diesel engine
Autorzy:
Haller, P.
Jankowski, A.
Kolanek, Cz.
Walkowiak, W. W.
Powiązania:
https://bibliotekanauki.pl/articles/246514.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
road transport
combustion engines
emulsion's fuels
air pollution
environmental protection
Opis:
The combustion of fuels is and will be in the nearest future a basic way of acquiring the energy, among others, for transport purposes. Transport causes many threats for natural environment. It produces powders and particulates, together with many gaseous noxious substances and is also the source of noise and vibrations. Sources of propulsion, applied in transport, are almost exclusively piston-combustion engines, among which the dominant role play self-ignition engines. In the light of well-known advantages of these engines, they were accepted as most beneficial sources of car vehicles' propulsion in nearest decades, provided they meet the requirements of the future legal regulations regarding the environmental protection. The emission of nitrogen oxides (NOx) and particulate matters (PM) is a problem to be solved in modern engines. This constitutes so called targets conflict, consisting in excluding the alternative of both coefficients’ decrease, in the way of regulation the set of an engine and the limiting emissions, permitted by the EURO regulations. From among many different methods of limiting both the formation and emission of NOx, the method of the selective catalytic reduction (SCR) is universally applied. This method requires special installation with the catalyst and the reservoir intended for the "clinically" clean reductive measure. In the aspect of constituting opinions regarding the need of reducing additional installations and media on board the vehicle, it seems that to supply the engine with fuel-water emulsion and especially fuel-water microemulsion becomes an interesting solution.
Źródło:
Journal of KONES; 2012, 19, 3; 165-170
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Neural methods of knowledge extraction
Autorzy:
Duch, W.
Adamczak, R.
Grąbczewski, K.
Jankowski, N.
Powiązania:
https://bibliotekanauki.pl/articles/206250.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
diagnostyka medyczna
optymalizacja
reguła logiczna
reguła rozmyta
wspomaganie decyzji
data mining
decision support
fuzzy rules
logical rules
medical diagnosis
optimization
Opis:
Contrary to the common opinion, neural networks may be used for knowledge extraction. Recently, a new methodology of logical rule extraction, optimization and application of rule-based systems has been described. C-MLP2LN algorithm, based on constrained multilayer perceptron network, is described here in details and the dynamics of a transition from neural to logical system illustrated. The algorithm handles real-valued features, determining appropriate linguistic variables or membership functions as a part of the rule extraction process. Initial rules are optimized by exploring the accuracy/simplicity tradeoff at the rule extraction stage and the one between reliability of rules and rejection rate at the optimization stage. Gaussian uncertainties of measurements are assumed during application of crisp logical rules, leading to "soft trapezoidal" membership functions and allowing to optimize the linguistic variables using gradient procedures. Comments are made on application of neural networks to knowledge discovery in the benchmark and real life problems.
Źródło:
Control and Cybernetics; 2000, 29, 4; 997-1017
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Correlations between the yield components and grain yield of winter wheat (Triticum aestivum ssp. vulgare L.) grown after winter rapeseed
Związek pomiędzy komponentami plonu a plonem ziarna pszenicy ozimej (Triticum aestivumssp. vulgare L.) uprawianej po rzepaku ozimym
Autorzy:
Jankowski, K.J.
Budzynski, W.S.
Dubis, B.
Powiązania:
https://bibliotekanauki.pl/articles/1201122.pdf
Data publikacji:
2015
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Źródło:
Rośliny Oleiste - Oilseed Crops; 2015, 36
1233-8273
Pojawia się w:
Rośliny Oleiste - Oilseed Crops
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 32

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