Artykuły (KNP) / Articles (CoNS)
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Item Efekty termomodernizacji ścian zewnętrznych i modernizacji systemu grzewczego(Energia i Budynek, 2012) Potera, PiotrW artykule wyprowadzono formuły półempiryczne na zmniejszenie sezonowego zapotrzebowania ciepła i obciążenia cieplnego budynków w wyniku termomodernizacji ścian zewnętrznychItem Time decay of stable absorption of gamma irradiated lithium niobate crystals doped by cuprum ions(Proceedings of International Conference Oxide Materials for Electronic Engineering 2012, pp 165-166, 2012) Potera, PiotrThe transient and stable color centers in pure and doped lithium niobate crystals (LNO) have been investigated in several works, for example in [1]. The stable color centers are centers which have lifetime higher then 1s. Unfortunately, the lifetime of color centers were studied in literature only for transient color centers, for example in [2]. In this work the lifetime of stable additional absorption induced by gamma irradiation in Cu doped of LNO crystal will be determined from data obtained during 10 years.Item Effect of pre-growth annealing of the properties on nonpurified cadmium telleuride single crystals obtained by sublimation method(Ukr. J. Phys. 57(8), 2012, pp 844-848, 2012) Popovych, V.D.; Gnatenko, Yu.P.; Bukyvskij, P.M.; Potera, PiotrItem Time decay of stable absorption of gamma irradiated LNO:Cu and YAP:Ce crystals(Materiały konferencji LTLA 2013, pp. 28-29,, 2013) Potera, Piotr; Stefaniuk, IreneuszItem Color Centers in Ca4GdO(BO3)3 Single Crystals Irradiated by Gamma Quanta(ACTA PHYSICA POLONICA A 124, (2013) 122-124, 2013) Potera, Piotr; Lukasiewicz, T.; Piecuch, AleksanderItem Stable absorption induced in Ca0,28Ba0,72Nb2O6 crystals by gamma quanta irradiation(Proceedings of International confernce OMEE2014, pp. 165, 2014) Potera, Piotr; Lukasiewicz, T.; Zhydachevskii, Y.Item Time Decay of Stable Absorption of Gamma Irradiated LNO, LNO:Cu and YAP:Ce Crystals(Acta Physica Polonica 126(3), (2014), 774-776, 2014) Potera, PiotrItem Anisotropy of the Conductivity in the Asymmetric Quantum Wells(ACTA PHYSICA POLONICA A, 2008) Majchrowski, Klaudiusz; Paśko, WiolettaGorbatsevich et al. and Kibis suggested that a number of interesting galvano-magnetic effects could be observed in quantum structures where the symmetry with respect to the space coordinates inversion and time- -reversal are broken simultaneously. In the paper of Kibis for example, the in¯nite triangular quantum well in an external magnetic field was considered and the anisotropy of electron momentum transfer due to interaction with phonons was predicted. The role of magnetic ¯eld was to provide the time- -invariance breaking. In this work we considered the e®ect of anisotropy of electron momentum transfer due to interaction with polarized light using more realistic model of ¯nite triangular quantum well. This anisotropy leads to the anisotropy of the real part of photoconductivity and as it follows from our calculations, the e®ect though not very great, could be measurable for the attainable values of magnetic ¯eld B ¼ 5 T and the widths of quantum well.Item Polynomial ultradisributions: differentiation and Laplace transformation(Banach Center Publication, Institute of Mathematics PAN, V.88, 2010) Łopuszański, OlehItem Magnetic Ordering of Itinerant Systems in Modified CPA approximation(2003) Górski, Grzegorz; Mizia, Jerzy; Kucab, KrzysztofItem Antiferromagnetic ordering of itinerant systems in modified mean field theory(2003) Górski, Grzegorz; Mizia, Jerzy; Kucab, KrzysztofItem Magnetic ordering of itinerant systems in modified mean field theory: antiferromagnetism(2003) Górski, Grzegorz; Mizia, Jerzy; Kucab, KrzysztofItem Interband pairing in extended two- and three-band Hubbard model(2004) Górski, Grzegorz; Mizia, Jerzy; Kucab, KrzysztofItem Hierarchical Classifiers for Complex Spatio-temporal Concepts(Springer-Verlag, 2008) Bazan, Jan G.The aim of the paper is to present rough set methods of constructing hierarchical classifiers for approximation of complex concepts. Classifiers are constructed on the basis of experimental data sets and domain knowledge that are mainly represented by concept ontology. Information systems, decision tables and decision rules are basic tools for modeling and constructing such classifiers. The general methodology presented here is applied to approximate spatial complex concepts and spatio-temporal complex concepts defined for (un)structured complex objects, to identify the behavioral patterns of complex objects, and to the automated behavior planning for such objects when the states of objects are represented by spatio-temporal concepts requiring approximation. We describe the results of computer experiments performed on real-life data sets from a vehicular traffic simulator and on medical data concerning the infant respiratory failure.Item Obliczanie pól sprzężonych w materiale ferromagnetycznym(Przegląd Elektrotechniczny -wyd. Sigma NOT, 2013-12) Pękala, Robert; Kwater, Tadeusz; Kwiatkowski, BogdanW artykule zaproponowano koncepcję obliczeń, pozwalających na badanie wzajemnego oddziaływania pola elektromagnetycznego oraz pola temperaturowego w środowisku magnetoprzewodu o właściwościach izotropowych. Bazując na idei interdyscyplinarnego modelowania matematycznego wykorzystano równania Maxwella oraz równania termodynamiki. Zaproponowano model matematyczny obiektu w postaci cienkiego pierścienia, skupiającego i zamykającego zmienny strumień magnetyczny. Rozwiązano numerycznie stan nieustalony oraz dokonano odpowiednich symulacji komputerowych.Item Bezinwazyjna diagnostyka uzwojeń magnesujących przy użyciu sztucznych sieci neuronowych(Przegląd Elektrotechniczny - Sigma NOT, 2011-08) Gomółka, Zbigniew; Kwiatkowski, Bogdan; Pękala, RobertW artykule zaproponowano ideę bezinwazyjnej metody dedykowanej wykrywaniu zwarć w uzwojeniach transformatorów. Metoda oparta jest o wykorzystanie modelu matematycznego transformatora toroidalnego oraz sztucznych sieci neuronowych. Bazując na polowo-obwodowym modelu toroidu wyodrębniono sygnały diagnostyczne w postaci odkształconych przebiegów prądu uzwojenia magnesującego, które użyto w procesie uczenia sieci neuronowych. Zamieszczone wyniki testów potwierdzają wysoką skuteczność neuronowego układu diagnostycznego.Item THE CHANGES OF AIR GAP IN INDUCTIVE ENGINES AS(DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS - American Institute of Mathematical Sciences, 2007) Twaróg, Bogusław; Pękala, Robert; Bartman, Jacek; Gomółka, ZbigniewThe method of analyzing vibration of electric engines or electro-magnetic generators proposed in the work is based on the analyzing of course current of load. In considerations were used the method based on specialized mathematics model and advanced calculation technique. It allow to create of patterns for artifcial neural networks. These patterns represented different states of machine for the diagnostic and they are enable to define precisely the changes caused by failure. Received experiments showed that the designed architecture of the net enables to achieve good properties of generalization correct answer for entrance date which weren't a part of training process.Item Correlation Effects in Band Ferromagnetism(cond-mat, 2004) Górski, Grzegorz; Mizia, JerzyWe analyze the influence of different on-site and inter-site interactions on the Curie temperature of transition metal magnetic elements. The numerical calculations show the well known result that the on-site Coulomb repulsion helps ferromagnetism mainly at half-filling of the band, where the 3d elements are antiferromagnetic (Cr, Mn). The inter-site interactions, which in the new approximation decrease the width of the band, favor ferromagnetism at both ends of the band. At the same time they lower the ferromagnetic Curie temperature towards experimental values, removing the paradox which persisted for a long time.Item A Domain Knowledge as A Tool For Improving Classifiers(IOS Press, 2013) Bazan, Jan G.; Buregwa-Czuma, Sylwia; Jankowski, AndrzejThis paper investigates the approaches to an improvement of classifiers quality through the application of a domain knowledge. The expertise may be utilizable on several levels of decision algorithms such as: feature extraction, feature selection, a definition of~temporal patterns used in an approximation of the concepts, especially of the complex spatio-temporal ones, an assignment of an object to the concept and a measurement of the objects similarity. The domain knowledge incorporation results then in the reduction of the size of searched spaces. The work constitutes an overview of classifier building methods efficiently utilizing the expertise, worked out latterly by Professor Andrzej Skowron research group. The methods using domain knowledge intended to enhance the quality of classic classifiers, to identify the behavioral patterns and for automatic planning are discussed. Finally it answers a question whether the methods satisfy the hopes vested in them and indicates the directions for future development.Item Rough Set Based Reasoning About Changes(IOS Press, 2012) Skowron, Andrzej; Stepaniuk, Jarosław; Jankowski, Andrzej; Bazan, Jan G.; Swiniarski, RyszardWe consider several issues related to reasoning about changes in systems interacting with the environment by sensors. In particular, we discuss challenging problems of reasoning about changes in hierarchical modeling and approximation of transition functions or trajectories. This paper can also be treated as a step toward developing rough calculus.