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Wyszukujesz frazę "Matrix transformation" wg kryterium: Temat


Tytuł:
On the degree of approximation of continuous functions by matrix means related to partial sums of a Fourier series
Autorzy:
Krasniqi, Xhevat Z.
Powiązania:
https://bibliotekanauki.pl/articles/746370.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Matrix transformation
Degree of approximation
Single Fourier series
Opis:
In this paper we generalize some results on the degree of approximation of continuous functions by matrix means related to partial sums of a Fourier series, obtained previously by some other authors (please consult references cited in this paper).
Źródło:
Commentationes Mathematicae; 2012, 52, 2
0373-8299
Pojawia się w:
Commentationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reduction of linear electrical circuits with complex eigenvalues to linear electrical circuits with real eigenvalues
Autorzy:
Kaczorek, T.
Borawski, K.
Powiązania:
https://bibliotekanauki.pl/articles/114258.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
linear
electrical circuit
complex
real
eigenvalues
transformation matrix
Opis:
The problem of reduction of linear electrical circuits with complex eigenvalues to linear electrical circuits with real eigenvalues is analyzed. Methods for finding the transformation matrix are presented. Considerations are illustrated by numerical examples.
Źródło:
Measurement Automation Monitoring; 2015, 61, 4; 115-117
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Bayesian Approach to Matrix Balancing: Transformation of Industry-Level Data under NACE Revision
Autorzy:
Boratyński, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/2076451.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
matrix balancing
Bayesian inference
NACE revision
transformation matrix
multi-sector modelling
Opis:
We apply Bayesian inference to estimate transformation matrix that converts vector of industry outputs from NACE Rev. 1.1 to NACE Rev. 2 classification. In formal terms, the studied issue is a representative of the class of matrix balancing (updating, disaggregation) problems, often arising in the field of multi- sector economic modelling. These problems are characterised by availability of only partial, limited data and a strong role for prior assumptions, and are typically solved using bi-proportional balancing or cross-entropy minimisation methods. Building on Bayesian highest posterior density formulation for a similarly structured case, we extend the model with specification of prior information based on Dirichlet distribution, as well as employ MCMC sampling. The model features a specific likelihood, representing accounting restrictions in the form of an underdetermined system of equations. The primary contribution, compared to the alternative, widespread approaches, is in providing a clear account of uncertainty.
Źródło:
Central European Journal of Economic Modelling and Econometrics; 2016, 4; 219-239
2080-0886
2080-119X
Pojawia się w:
Central European Journal of Economic Modelling and Econometrics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A skew ray tracing approach for error analysis of a light ray path for optical systems with asymmetrical optical axes
Autorzy:
Liao, T T
Kung, C
Chen, C T
Powiązania:
https://bibliotekanauki.pl/articles/173300.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
skew ray tracing
homogeneous coordinate transformation matrix
error analysis
Opis:
This study applies a skew ray tracing approach based on a 4×4 homogeneous coordinate transformation matrix and Snell’s law to analyze the errors of a ray light path as it passes through a series of optical elements in an asymmetrical optical system. The proposed error analysis methodology considers two principal sources of a light path error, namely: i) the translational errors and the rotational errors which determine the deviation of the light path at each boundary surface, and ii) the differential changes induced in the incident point position and unit directional vector of the refracted/reflected ray as a result of differential changes in the position and unit directional vector of the light source. The validity of the proposed methodology is verified by analyzing the effects of optical errors in a corner cube.
Źródło:
Optica Applicata; 2015, 45, 2; 249-261
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reasoning in machinery diagnostics aided by augmented reality system
Wnioskowanie w diagnostyce maszyn wspomagane systemem rozszerzonej rzeczywistości
Autorzy:
Panfil, W.
Moczulski, W.
Wyczółkowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/328272.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
rozszerzona rzeczywistość
macierz transformacji
przetwarzanie obrazów
augmented reality
transformation matrix
image processing
Opis:
This paper deals with augmented reality system that was developed within the framework of MSc Thesis in Department of Fundamentals of Machinery Design. The main idea of this thesis was to implement AR system in reasoning in machinery diagnostics. The authors decided to apply the system to aid measuring noise level of the machine in the course of its operation. Next, using graphical elements, the system informs the user about measurement results. In the first part of this paper augmented reality systems are shortly described. Afterwards the elaborated system is presented, including its concept, structure, and functioning. The paper ends with some conclusions concerning especially system operation.
Artykuł ten przedstawia system rozszerzonej rzeczywistości, który został opracowany w Katedrze Podstaw Konstrukcji Maszyn Politechniki Śląskiej w Gliwicach podczas realizacji Pracy Dyplomowej Magisterskiej. Głównym celem tej pracy było zastosowanie systemu rozszerzonej rzeczywistości we wspomaganiu procesu wnioskowania diagnostycznego. Zdecydowano się na wykorzystanie systemu jako środka wspomagającego pomiar mocy akustycznej hałasu wytwarzanego przez maszynę podczas jej działania. Następnie system ten informuje (za pomocą elementów graficznych) o wynikach pomiarów w określonych punktach znajdujących się wokół maszyny. W pierwszej części artykułu opisane są krótko systemy rozszerzonej rzeczywistości. Następnie przedstawiony jest opracowany system rozszerzonej rzeczywistości oraz wnioski, jakie nasunęły się w trakcie prac nad nim.
Źródło:
Diagnostyka; 2005, 35; 89-94
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling the Kinematics of Two Robots with Denavit–Hartenberg Notation
Autorzy:
Burghardt, Andrzej
Skwarek, Wincenty
Powiązania:
https://bibliotekanauki.pl/articles/1831347.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
robot formation
kinematics
Denavit-Hartenberg notation
transformation matrix
formacja robota
kinematyka
notacja Denavita-Hartenberga
macierz transformacji
Opis:
This article presents a description and methodology for building a kinematics model for the formation of twowheeled mobile robots transporting a beam using Denavit–Hartenberg notation. The simple and inverse kinematics tasks of this formation were solved. Solutions of kinematics tasks are presented in junction coordinates and global coordinates. The obtained results were simulated using the Matlab–Simulink package together with animation of the solution using a programmed emulator of robot work.
Źródło:
Advances in Manufacturing Science and Technology; 2020, 44, 4; 121-128
0137-4478
Pojawia się w:
Advances in Manufacturing Science and Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of nuclear matrix attachment regions on transgene expression in tobacco plants.
Autorzy:
Nowak, Witold
Gawłowska0, Magdalena
Jarmołowski, Artur
Augustyniak, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/1044093.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
plant transformation
matrix attachment region
transgene expression
Opis:
Matrix attachment regions (MARs) are thought to participate in the organization and segregation of independent chromosomal loop domains. Although there are several reports on the action of natural MARs in the context of heterologous genes in transgenic plants, in our study we tested a synthetic MAR (sMAR) with the special property of unpairing when under superhelical strain, for its effect on reporter gene expression in tobacco plants. The synthetic MAR was a multimer of a short sequence from the MAR 3' end of the immunoglobulin heavy chain (IgH) enhancer. This sMAR sequence was used to flank the β-glucuronidase (GUS) reporter gene within the T-DNA of the binary vector pBI121. Vectors with or without the sMARs were then used to transform tobacco plants by Agrobacterium tumefaciens. Transgenic plants containing the sMAR sequences flanking the GUS gene exhibited higher levels of transgene expression compared with transgenic plants which lacked the sMARs. This effect was observed independently of the position of the sMAR at the 5' side of the reporter gene. However, variation of the detected transgene expression was significant in all transformed plant populations, irrespective of the construct used. Most genes whose expression has been studied in transgenic plants are generally expressed in appropriate patterns. However, transgene expression can vary within an extremely wide range, often showing only a very low level [1, 2]. Variation in transgene expression is frequently attributed to corresponding variation in the transcription potential of different chromosomal insertion sites. DNA sequences called scaffold/matrix attachment regions (S/MARs) are involved in the structural and functional organization of all eukaryotic genomes. Evolutionarily, the structures of these sequences seem to be conserved. Typically, S/MARs are located every 5 to 200 kb of sequence and are known to bind specifically to components of the nuclear scaffold, therefore suggesting that they are responsible for loop domain base formation [3, 4].Of the MAR elements reported, many do not display extensive sequence homology. It is therefore reasonable to assume that the scaffold probably recognizes some structural features of the MAR DNA rather than a specific sequence [5].MARs appear to be functionally conserved, since animal MARs can bind to plant nuclear scaffolds and vice versa [6, 7].Most MARs have been generally characterized as AT-rich sequences. However, AT-richness per se is not a sufficient criterion for specific sequence recognition of MARs by specific binding proteins [7]. Their capacity to bind to the nuclear matrix is determined by the specific structure of DNA. A prominent structural characteristic of different MARs is their strong potential for extensive unpairing when subjected to superhelical strain [8, 9]. The ability to assume a stably unpaired conformation has been described for several MARs. For example, within the MAR 3' end of immunoglobulin heavy chain (IgH) enhancer there is an AATATATTT motif that is a nucleation site for DNA unwinding [10]. Concatamerized oligonucleotides containing seven repeats of this sequence exhibited a strong affinity for the nuclear scaffold and increased SV40 promoter activity in stably transformed mouse cells [11].In this paper we present results of our studies that concern the effect of a synthetic MAR on transgene expression in tobacco plants. The synthetic MAR sequences were used to flank the β-glucuronidase (GUS) gene whose transcription was under control of the 35S CaMV promoter in the binary vector pBI121. This construct was introduced into tobacco plants and the GUS reporter gene expression was monitored in stably transformed plants.
Źródło:
Acta Biochimica Polonica; 2001, 48, 3; 637-646
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some algorithms of computer algebra
Nekotorye algoritmy kompjuternojj algebry
Autorzy:
Porkuian, O.
Timoshyn, A.
Timoshyna, L.
Powiązania:
https://bibliotekanauki.pl/articles/792358.pdf
Data publikacji:
2016
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
algorithm
computing determinant
implementation
unitriangular transformation
matrix computation
Maxima system
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2016, 16, 2
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The method of the fast Radon transform calculation based on the usage of scheme calculation symmetry properties
Metoda szybkich przekształceń Radona bazująca w obliczeniach na użyciu własności symetrii
Autorzy:
KOBASYAR, MYHAYLO
KOSAREVYCH, ROSTYSLAV
BOHDAN, RUSYN
MOLGA, AGNIESZKA
Powiązania:
https://bibliotekanauki.pl/articles/456296.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Rzeszowski
Tematy:
transformation
integration line
rotational-mirrored symmetries
system matrix
transformacja
linia integracji
obrotowa symetria obrazu
system macierzy
Opis:
The method of the fast Radon transform calculation whith uses properties of symmetry has been proposed. The scheme calculation symmetry properties were investigated. It allows to calculate less number of necessary characteristics. The carried out researches have shoun affectivity of proposed method, with essentially alloved to decrease time of Radon transform calculation.
Zaproponowano metodę szybkiego przetwarzania Radona, która wykorzystuje własności symetrii. Zbadano schemat własności symetrii. Pozwala to obliczyć mniejszą ilość potrzebnych charakterystyk. Prowadzone badania pokazują efektywność zaproponowanej metody, która pozwala zmniejszyć czas obliczenia szybkiego przetwarzania Radona.
Źródło:
Edukacja-Technika-Informatyka; 2010, 1, 2; 218-224
2080-9069
Pojawia się w:
Edukacja-Technika-Informatyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A method for local approximation of a planar deformation field
Autorzy:
Ligas, Marcin
Banaś, Marek
Szafarczyk, Anna
Powiązania:
https://bibliotekanauki.pl/articles/106795.pdf
Data publikacji:
2019
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
deformation analysis
polar decomposition
affine transformation
rotation matrix
stretch tensor
analiza deformacji
rozkład biegunowy operatora
transformacja afiniczna
macierz obrotu
Opis:
We present a method of approximation of a deformation eld based on the local ane transformations constructed based on n nearest neighbors with respect to points of adopted grid. The local ane transformations are weighted by means of inverse distance squared between each grid point and observed points (nearest neighbors). This work uses a deformation gradient, although it is possible to use a displacement gradient instead – the two approaches are equivalent. To decompose the deformation gradient into components related to rigid motions (rotations, translations are excluded from the deformation gradient through dierentiation process) and deformations, we used a polar decomposition and decomposition into a sum of symmetric and an anti-symmetric matrices (tensors). We discuss the results from both decompositions. Calibration of a local ane transformations model (i.e., number of nearest neighbors) is performed on observed points and is carried out in a cross-validation procedure. Verication of the method was conducted on simulated data-grids subjected to known (functionally generated) deformations, hence, known in every point of a study area.
Źródło:
Reports on Geodesy and Geoinformatics; 2019, 108; 1-8
2391-8365
2391-8152
Pojawia się w:
Reports on Geodesy and Geoinformatics
Dostawca treści:
Biblioteka Nauki
Artykuł

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