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1
Content available The optimisation of chromatographic conditions for the determination of acceptor-donor properties of graphene oxide and reduced graphene oxide
Grajek H., Jonik J., Rutkowski L., Purchała M., Wawer T.
Acta Innovations
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2018
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no. 26
5--20
EN
The oxidised and reduced graphene samples (having different surface functionalities) were studied by inverse gas chromatography to characterise their acceptor-donor properties. The DN values denoting the donor number in the Gutmann scale and the AN* values denoting the acceptor number in the Riddle-Fowkes scale have been chosen in the estimation of the electron-acceptor parameter KA and electron-donor parameter KD values.
2
Content available Orthopedic diagnostics with ensembles of learning systems
Szarek A., Korytkowski M., Rutkowski L., Scherer R., Szyprowski J.
Aktualne Problemy Biomechaniki
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2012
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z. 6
141--146
3
Content available remote Metody projektowania rozmytych sterowników
Rutkowski L., Nowicki R., Pokropińska A.
Pomiary Automatyka Robotyka
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2008
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R. 12, nr 2
82--98
PL
W pracy przedstawiono metody projektowania rozmytych sterowników z wykorzystaniem podejścia Mamdaniego, logicznego oraz Takagi-Sugeno. Zaproponowano nową metodę oceny efektywności działania rozmytych sterowników. Metoda ta została oparta na kryteriach statystycznych zastosowanych w celu sprowadzenia optymalizacji wielokryterialnej do optymalizacji jednokryterialnej. Istotnym elementem tej metody jest wprowadzenie pojęcia linii izokryterialnych, które w znacznym stopniu ułatwiają projektantowi orientację w zbiorze potencjalnych rozwiązań. Wyniki przedstawionych w pracy badań potwierdzą jej przydatność w procesie projektowania systemów rozmytych. Metodę można również z powodzeniem zastosować w projektowaniu innych podobnych systemów, jak np. sieci neuronowych lub systemów ekspertowych.
EN
In the paper the problem of fuzzy controllers designing is considered as the multicriterial optimization. Various Mamdani-type, logical-type and Takagi-Sugeno neuro-fuzzy systems, serving as fuzzy controllers, are studied and compared. Methods for the autoregressive order process estimation are adopted to solve problem of the trade-off between accuracy and number of parameters used to the construction of neuro-fuzzy systems.
4
Content available Podejmowanie decyzji z wykorzystaniem zbiorów rozmytych typu 2
Rutkowski L.
Automatyka / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
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2006
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T. 10, z. 3
181-187
PL
W pracy przedstawiono zbiory rozmyte typu 2. Omówiono operację przecięcia zbiorów rozmytych typu 2 oraz operację redukcji typu. Sformułowano i rozwiązano zadanie podejmowania decyzji z wykorzystaniem zbiorów rozmytych typu 2.
EN
In the paper type 2 fuzzy sets are presented. The intersection operation and type reduction operation are explained. An application of type 2 fuzzy sets to decision making systems is given.
5
Nowe metody inteligencji komputerowej
Rutkowski L.
Zeszyty Naukowe Wydziału ETI Politechniki Gdańskiej. Technologie Informacyjne
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2005
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T. 6
3-14
PL
W artykule zostaną przedstawione nowe metody inteligencji komputerowej. Najpierw opisano tzw. probabilistyczne sieci neuronowe, które pozwalają na rozwiązanie szerokiej klasy problemów identyfikacji i klasyfikacji w przypadku stacjonarnym i niestacjonarnym. Następnie przedstawiono struktury neuronowo-rozmyte z wykorzystaniem podejścia Mamdaniego oraz logicznego. Ponadto pokazano nowe metody modelowania niepewności w systemach rozmytych z wykorzystaniem zbiorów rozmytych typu 2.
6
Applying artificial intelligence techniques to analog fault detection and classification
Rutkowski L.
Zeszyty Naukowe Wydziału ETI Politechniki Gdańskiej. Technologie Informacyjne
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2005
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T. 6
15-24
EN
Basic concepts of fault diagnosis in analog circuits and devices by means of the simulation-before test approach, the so called dictionary approach, have been presented. Special attention has been paid to application of artificial intelligence tools, such as: artificial neural networks, fuzzy sets and evolutionary computing
7
Content available remote A new method for system modelling and pattern classification
Rutkowski L.
Bulletin of the Polish Academy of Sciences. Technical Sciences
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2004
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Vol. 52, nr 1
11-24
EN
In this paper we present a new class of neuro-fuzzy systems designed for system modelling and pattern classification. Our approach is characterized by automatic determination of fuzzy inference in the process of learning. Moreover, we introduce several flexibility concepts in the design of neuro-fuzzy systems. The method presented in the paper is characterized by high accuracy which outperforms previous techniques applied for system modelling and pattern classification.
8
Content available remote A flexible approach to fuzzy modelling
Rutkowski L., Cpałka K.
Automatyka / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
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2004
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T. 8, z. 3
247-252
EN
In this paper we present a new method to fuzzy modelling. The Mamdani type reasoning is combined with the logical approach. The results will be illustrated on typical benchmarks.
PL
W pracy zaprezentowano nową metodę rozmytego modelowania. Polega ona na odpowiednim połączeniu wnioskowania Mamdaniego i wnioskowania logicznego. Zaproponowane rozwiązanie zilustrowano wynikami symulacji.
9
Content available A neuro-fuzzy controller with a compromise fuzzy reasoning
Rutkowski L., Cpałka K.
Control and Cybernetics
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2002
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Vol. 31, no 2
297-308
EN
This paper presents a compromise approach to neuro-fuzzy controllers. It includes both Mamdani (constructive) and logical (destructive) fuzzy inference. New neuro-fuzzy controllers are derived and simulation results are presented.
10
Content available Symmetry and asymmetry as a physical and perceptual feature of the complementary pair of bearing sinusoids. Part I. Amplitude and frequency envelope relations
Rutkowski L.
Archives of Acoustics
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1998
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Vol. 23, no. 1
51--66
EN
Beating sinusoids are an interesting case of a simultaneous change of intensity and frequency achieved without the need of a modulator. Studies of the perception of beats provide numerous data concerning also the sound pitch perception. Hitherto, the following conclusions have been made from those studies: i) if the amplitude of one tone is much larger than the amplitude of the other one, of the two-tone complex, the pitch shifts towards the frequency of the larger amplitude tone; ii) if the amplitudes of the two tones are the same, the pitch is localized precisely at the arithmetic average of the two tone frequencies. These statements imply therefore, that a symmetry with respect to the arithmetic average frequency of the two-tone beatings is present in the pitch localization on the frequency scale. Most recent studies show, however, that this symmetry is not always maintained. In the current study, divided into Part 1 and Part 2, an attempt is made, basing on the discussion and numerical analysis of the functions which describe the beatings, to determine the cause of this asymmetry. One of the arguments may come from the fact that the narrow-band condition for beating waveforms is only partially satisfied. This implies that the consequences of the relative rate of changes of the amplitude envelope to the resultant frequency envelope should be considered in the analysis of the beatings signal. The lack of symmetry is evidenced by the functions which reflect the influence of the magnitude of the ratio of the amplitudes of two signal components on the values of the normalised parameters EWAIF (Envelope Weighted Average of Instantaneous Frequency) and IWAIF (Intensity Weighted Average of Instantaneous Frequency) correlated with the sound pitch. In Part 2, two psychoacoustic experiments are described that aimed at the examination of the pitch of beatings in view of the symmetry arguments mentioned above. Main conclusions obtained in this part of the study are used throughout together with the literature available on this subject.
11
Content available Symmetry and asymmetry as a physical and perceptual feature of the complementary pair of bearing sinusoids. Part II. Pitch matching experiments
Rutkowski L., Wicher A.
Archives of Acoustics
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1998
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Vol. 23, no. 1
67--85
EN
Two experiments were designed and performed in that the pitch of complementary pairs of beats signals, referred to as SL and SH, was evaluated. In experiment 1, the changeable signal consists of a pair of signals of equal sound pressure level and of the same separation of frequencies as this between SL and SH. Experiment 2 was made in the AM mode with a changeable signal whose amplitude envelope is identical with that of the SL/SH pair; the carrier frequency could be varied during the experiment. The results of the experiment 1 do not confirm the asymmetry in the evaluation of the pitch of the pairs of SL/SH signals with respect to the average frequency of the beats, a feature that has been reported earlier in the literature. On the order hand, the outcome of the experiment 2 point to certain asymmetry, moreover, the data reveal a large pitch difference of the SL/SH pairs; this difference (for which no explanation has been offered yet) is often much larger than that measured in experiment 1. The observed asymmetry, which is due to frequency variations determined with the frequency envelope (Part I) resulting from the broadband character of the beatings, does not quite justify the range of asymmetries reported in literature.
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