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    Wyświetlanie 1-5 z 5
    Tytuł:
    Synteza estymatorów dla obiektów o strukturze szeregowej
    Synthesis of estimators for objects with a serial structure
    Autorzy:
    Kwater, T.
    Pękala, R.
    Twaróg, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/156873.pdf
    Data publikacji:
    2013
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    systemy złożone
    równania dynamiki
    gra Nasha
    równanie Riccatiego
    równanie dwuliniowe
    complex systems
    dynamics equations
    Nash game
    Ricatti equation
    bilinear equations
    Opis:
    Artykuł dotyczy zdecentralizowanego podejścia do syntezy estymacji stanu obiektu złożonego poprzez rozdzielenie problemu optymalizacyjnego na podproblemy o mniejszej wymiarowości. Główna idea metody polega na przyporządkowaniu podobiektom indywidualnych wskaźników jakości i prowadzeniu syntezy estymatorów w sposób sekwencyjny. Wzmocnienia filtru złożonego wyznacza się rozwiązując problemy małej wymiarowości (wymiarowość podobiektów). Uzyskuje się strukturę odpowiadającą lokalnemu, klasycznemu filtrowi Kalmana oraz sprzężeń skrośnych.
    The paper concerns the presentation of a certain approach, in which decentralization of calculations associated with the synthesis of object state estimation is presented. It is realized by dividing the optimization problem into sub-problems of smaller dimensionality. For this purpose, a differential Nash game for objects with a serial structure was utilized. The main idea of the method is to assign individual quality indicators to each sub-object and to carry out the synthesis of estimators in a sequential manner, starting with the last sub-object. Implementation of the estimation process requires knowledge about the measurements of the individual sub-objects. Parameters of local controllers are calculated based on the individual Riccati equations for sub-objects. Strengthening cross-linkage connections was established based on the solutions of certain bilinear equations. The presented method leads to a structure that fits the local classical Kalman filter and cross-coupling.
    Źródło:
    Pomiary Automatyka Kontrola; 2013, R. 59, nr 10, 10; 1064-1066
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Local Structure of Mn in $(La_{1-x}Ho_{x})_{2//3}Ca_{1//3}MnO_{3}$ Studied by X-ray Absorption Fine Structure
    Autorzy:
    Pietnoczka, A.
    Pękała, M.
    Bacewicz, R.
    Drozd, V.
    Fagnard, J.
    Vanderbemden, P.
    Antonowicz, J.
    Zalewski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1538864.pdf
    Data publikacji:
    2010-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.05.cj
    75.47.Lx
    87.64.kd
    Opis:
    Results of X-ray absorption fine structure measurements in manganites $(La_{1-x}Ho_{x})_{2//3}Ca_{1//3}MnO_{3}$ with 0.15 < x < 0.50 are presented. When $LaMnO_{3}$ is doped with a divalent element such as $Ca^{2+}$, substituting for $La^{3+}$, holes are induced in the filled Mn d orbitals. This leads to a strong ferromagnetic coupling between Mn sites. Ca ions in $La_{1-x}Ca_{x}MnO_{3}$ introduce a distortion of the crystal lattice and mixed valence Mn ions ($Mn^{3+}$ and $Mn^{4+}$). On the other hand, in manganites $(La_{1-x}Ho_{x})_{2//3}Ca_{1//3}MnO_{3}$ the substitution of La for Ho causes a lattice distortion and induces a disorder, which reduces a magnetic interaction. The ferromagnetic transition temperature and conductivity decrease very quickly with increasing x. The magnetic and transport properties of compounds depend on the local atomic structure around Mn ions. The information on the bond lengths and Debye-Waller factor are obtained from the extended X-ray absorption fine structure (EXAFS) data analysis. The charge state of Mn is determined from the position of the absorption edge in X-ray absorption near edge structure (XANES) data. XAFS results are in good agreement with magnetic characteristics of the studied materials.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 2; 281-285
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wyznaczenie przemieszczeń powierzchniowych na osuwisku w Kłodnem (gmina Limanowa, południowa Polska)
    Determination of surface displacement on the landslide in Kłodne (Limanowa community, southern Poland)
    Autorzy:
    Ćwiąkała, P.
    Stanisz, J.
    Wróbel, A.
    Kaczmarczyk, R.
    Drwal, P.
    Grabek, P.
    Daroch, M.
    Pękala, M.
    Świątek, M.
    Zierkiewicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075554.pdf
    Data publikacji:
    2016
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Karpaty fliszowe
    osuwiska
    monitoring geodezyjny
    Kłodne
    flysch Carpathians
    landslides
    geodetic monitoring
    Opis:
    Examination of the landslide in Kłodne was carried out in 2013 and 2014. The work was divided into two parts: geological engineering investigations (mapping of the external borders of the landslide) and geodetic surveying (photogrammetric studies and monitoring of surface movements). The boundaries of the landslide were marked using a Garmin eTrex GPS receiver and a geological compass (Freiberg). The boundaries have not changed and is convergent with previous studies. In the south-western part of the landslide the boundary is blurred as a result of anthropogenic transformation of the area. In the south-eastern part (as at May17, 2014) about 200 m3 of the colluvial material has been moved. Photogrammetric studies were based on the analysis of aerial photos from May 26, 2009 (prior tothe landslide formation) and on the orthophotomap created from images taken in July 2010, after the formation of the landslide. Displacement vectors were determined by comparing the locations of specific terrain details in the pictures taken before and after the mass movements occurred. In the upper part of the landslide the maximum horizontal displacement value was 87.7 m, the minimum was 6.2, and the average – 84.5 m. In the lower part of the landslide the horizontal displacements amounted to 65.5 m, had a minimum value of 10.3, and an average of 54.8 m. In the last stage of the study the base measurement network was created. It consisted of 68 points stabilized in the ground. The measurements were performed using the static GNSS observations method and linear-angular measurements carried out with a precise total station. In 2013, horizontal displacements ranged from 1 to 8.1 mm, and vertical ones ranged from –9.8 to 13.5 mm. In 2014, there were displacements observed in the vicinity of the main slope. They were directed to the south. The horizontal displacement vector has reached values from 2 to 94 mm, and the vertical vector was from –63 to 16 mm.
    Źródło:
    Przegląd Geologiczny; 2016, 64, 2; 122--130
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geomorphological settings of Polish research areas on Spitsbergen
    Autorzy:
    Zwoliński, Z.
    Giżejewski, J.
    Karczewski, A.
    Kasprzak, M.
    Lankauf, K. R.
    Migoń, P.
    Pękala, K.
    Repelewska-Pękalowa, J.
    Rachlewicz, G.
    Sobota, I.
    Stankowski, W.
    Zagórski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/295146.pdf
    Data publikacji:
    2013
    Wydawca:
    Stowarzyszenie Geomorfologów Polskich
    Tematy:
    polar landform
    polar geomorphology
    glacial relief
    postgalacial relief
    Polish geomorphological research
    Spitsbergen
    Opis:
    Paper described geomorphological characteristics of landform sets which occur on research areas investigated by Polish geomorphologists on Spitsbergen. These area involve four areas along the western coast of Spitsbergen, i.e. vicinities of the Kaffiøyra, the Werenskioldbreen, the Calypsostranda, and the Hornsund, as wel as one area located in the central part of Spitsbergen, i.e. vicinity of Billefjord with special emphasis on surroundings of the Petuniabkukta. Landforms are characterized in different morphogenetic terms, mainly glacial, peryglacial, deundational, slope, fluvial, even eolian factors and processes.
    Źródło:
    Landform Analysis; 2013, 22; 125-143
    1429-799X
    Pojawia się w:
    Landform Analysis
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A New Method of Teaching Spatial Orientation to the Blind
    Autorzy:
    Hojan, E.
    Jakubowski, M.
    Talukder, A.
    Wereda, H.
    Furmann, A.
    Ewertowski, R.
    Skrodzka, E.
    Perz, P.
    Pękala, P.
    Bogusz, E.
    Lubawy, H.
    Tomaszewski, F.
    Czechyra, B.
    Orczyk, M.
    Szymański, G.
    Niewiarowicz, M.
    Hojan-Jezierska, D.
    Jezierska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1490435.pdf
    Data publikacji:
    2012-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    43.66.Yw
    Opis:
    Elaboration of a new method of teaching spatial orientation to blind and visually handicapped persons base on urban environment sounds was shown. Task 1 is a questionnaire inquiry on the problems of the blind moving in a big city. In Task 2 a preliminary selection and classification of the acoustic signals and vibrations that can be useful for spatial orientation was made. In Task 3 an analysis of acoustic signals for sound signalisation at pedestrian crossings was made. Some solutions for acoustic signalization were proposed. In Task 4 sounds and vibrations necessary for a library of acoustic events and situations characteristic of a city were recorded. In Task 5 the library was created and arranged to be ready to be used by teachers in the spatial orientation training. The most important outcome of the study was to develop a method of spatial orientation teaching with employment of sounds and verification of the method (Task 6). After verification it is concluded that the method is useful for spatial education of the blind at different levels of their education.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 1A; A-005-A-008
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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