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Wyszukujesz frazę "filter" wg kryterium: Temat


Tytuł:
Digital filter tuned according to spectral analysis of direct drive to reduce mechanical resonance effect
Autorzy:
Łuczak, D.
Powiązania:
https://bibliotekanauki.pl/articles/97189.pdf
Data publikacji:
2012
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
digital filter
mechanical resonance
filter
Opis:
Review of the filter structures and spectral analysis algorithms was done. Digital filters allow filtering the speed signal in control loop of direct drive with a mechanical resonance. The analogue filter equations were transformed into digital filters to enable tune them in real time. Spectral analysis with additional algorithm allows to determine the mechanical resonance frequency of multi-mass system. Determination of resonance frequencies allow for proper tune the digital filter. This paper presents selected algorithms of determine signal spectrum. In order to determine the mechanical resonance frequency from the whole spectrum, it is require to use an additional algorithm that was omitted from the consideration. Filters were tuned according to frequency characteristics of the object.
Źródło:
Computer Applications in Electrical Engineering; 2012, 10; 194-204
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Filters of lattices with respect to a congruence
Autorzy:
Sambasiva Rao, M.
El-Mohsen Badawy, Abd
Powiązania:
https://bibliotekanauki.pl/articles/729197.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
congruence
filter
closure operator
θ-filter
congruence lattice
Opis:
Some properties of filters on a lattice L are studied with respect to a congruence on L. The notion of a θ-filter of L is introduced and these filters are then characterized in terms of classes of θ. For distributive L, an isomorphism between the lattice of θ-filters of L and the lattice of filters of $L_{/θ}$ is obtained.
Źródło:
Discussiones Mathematicae - General Algebra and Applications; 2014, 34, 2; 213-219
1509-9415
Pojawia się w:
Discussiones Mathematicae - General Algebra and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and Optimization of Rectangular Waveguide Filter based on Direct Coupled Resonators
Autorzy:
Damou, M.
Nouri, K.
Feham, M.
Chetioui, M.
Powiązania:
https://bibliotekanauki.pl/articles/963863.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
coupling matrix
filter
waveguide
technology
electromagnetic
band-pass filter
Opis:
The waveguide filter structure is treated by two softwares (HFSS (High Frequency Structure Simulator) and CST (Computer Simulation Technology)). Numerical example is given in this article to demonstrate, step by step, the application of the approach to the design of resonator, direct coupled waveguide and microstrip filters based on electromagnetic (EM) simulations. For this design procedure, the filter structure is simulated by successively adding one resonator at a time. To continue the work illustrates how to design a fourth order coupled resonator based rectangular waveguide circuit in the traditional way. With a large number of variables, such tuning work consumes a lot of time and the convergence of the final result is not guaranteed. A fourth order X-band bandpass filter with a center frequency of 11 GHz and a fractional bandwidth FBW = 0,0273 is designed using this procedure and presented here as an example. The simulated results by CST are presented and compared withthe results simulated by a high-frequency structure simulator. Good agreement between the simulated HFSSand simulated results by CST is observed.
Źródło:
International Journal of Electronics and Telecommunications; 2017, 63, 4; 375-380
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Compounding Objects
Autorzy:
Šikić, Zvonimir
Powiązania:
https://bibliotekanauki.pl/articles/749886.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Łoś's theorem
converse of Łoś's theorem
filter
proper filter
ultrafilter
Opis:
We prove a characterization theorem for filters, proper filters and ultrafilters which is a kind of converse of Łoś's theorem. It is more natural than the usual intuition of these terms as large sets of coordinates, which is actually unconvincing in the case of ultrafilters. As a bonus, we get a very simple proof of Łoś's theorem.
Źródło:
Bulletin of the Section of Logic; 2020, 49, 2
0138-0680
2449-836X
Pojawia się w:
Bulletin of the Section of Logic
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Roughness of Filters in Equality Algebras
Autorzy:
Rezaei, Gholam Reza
Borzooei, Rajab Ali
Aaly Kologani, Mona
Jun, Young Bae
Powiązania:
https://bibliotekanauki.pl/articles/43180962.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
equality algebra
approximation space
D-lower approximation
D-upper approximation
filter
D-lower filter
D-upper filter
Opis:
Rough set theory is an excellent mathematical tool for the analysis of a vague description of actions in decision problems. Now, in this paper by considering the notion of an equality algebra, the notion of the lower and the upper approximations are introduced and some properties of them are given. Moreover, it is proved that the lower and the upper approximations define an interior operator and a closure operator, respectively. Also, using D-lower and D-upper approximation, conditions for a nonempty subset to be definable are provided and investigated that under which condition D-lower and D-upper approximation can be filter.
Źródło:
Bulletin of the Section of Logic; 2023, 52, 1; 1-18
0138-0680
2449-836X
Pojawia się w:
Bulletin of the Section of Logic
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Strong meager properties for filters
Autorzy:
Laflamme, Claude
Powiązania:
https://bibliotekanauki.pl/articles/1208397.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
filter
meager
Baire property
Opis:
We analyze several "strong meager" properties for filters on the natural numbers between the classical Baire property and a filter being $F_σ$. Two such properties have been studied by Talagrand and a few more combinatorial ones are investigated. In particular, we define the notion of a P⁺-filter, a generalization of the traditional concept of P-filter, and prove the existence of a non-meager P⁺-filter. Our motivation lies in understanding the structure of filters generated by complements of members of a maximal almost disjoint family.
Źródło:
Fundamenta Mathematicae; 1994-1995, 146, 3; 283-293
0016-2736
Pojawia się w:
Fundamenta Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization measurement method for checkweigher
Autorzy:
Ugodziński, R.
Kamiński, M.
Nowicki, M.
Szewczyk, R.
Powiązania:
https://bibliotekanauki.pl/articles/114697.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
checkweigher
optimization
weighing methods
filter
Opis:
Abstract: The paper presents a new measurement method for checkweighers, where the measurement result is obtained by solving a simple optimization problem. The method assumes that the mass of constant geometry and a small masses spread is measured. The measurement accuracy changes as a function of noise-eliminating low-pass filter frequency was investigated. The state of knowledge about the filtration of checkweigher signal is also summarized.
Źródło:
Measurement Automation Monitoring; 2015, 61, 2; 39-42
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Designed Filter with CCII+ and Analysis of EEG for Epilepsy and Alzheimer
Autorzy:
Kitiş, Ş.
Apaydın, H.
Güntürkün, R.
Powiązania:
https://bibliotekanauki.pl/articles/1030098.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
CCII+
Alzheimer
epilepsy
filter
amplifier
Opis:
Biomedical signals are usually low amplitude and high bandwidth signals. EEG signals are very low amplitude (generally less than 300 μV) and very high bandwidth (range from 0.5 to 100 Hz), too. EEG was used to assist in the diagnosis of brain damage, Alzheimer disease and Parkinson disease, and certain mental disorders. In this study amplifier and filters designed with CCII+ and these simulations are performed with PSPICE program. Normal brain signal, the Alzheimer brain signal, epilepsy brain signal are compared, the shrinking hippocampus compared 25 years old normal brain, 75 years old normal brain and 75 years old with the Alzheimer brain.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 423-426
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low order autoregressive models for FDTD analysis of microwave filters
Autorzy:
Kozakowski, P.
Mrozowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/308152.pdf
Data publikacji:
2002
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
FDTD
signal processing
AR
filter
Opis:
The forward-backward autoregressive (AR) model is applied to extract time signatures generated by the FDTD algorithm. It is shown that using simple techniques of model parameters selection one is able to reduce the model complexity for low and medium Q circuits.
Źródło:
Journal of Telecommunications and Information Technology; 2002, 1; 48-51
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An optimum reactance one-port compensator for harmonic mitigation
Autorzy:
El-Saadany, E. F.
Zeineldin, H.
Powiązania:
https://bibliotekanauki.pl/articles/262641.pdf
Data publikacji:
2005
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
filter
harmonics
nonlinear loads
optimization
Opis:
The installation of electronic devices, digital equipment, and nonlinear loads in both industrial and domestic applications have dramatically increased in recent years, which in turn increased the level of harmonics in the system. Harmonic distortion is widely recognized as a significant cause of damage to, and mat-operation of electrical equipment. A harmonic filter can eliminate the potentially dangerous effects of harmonic currents created by nonlinear loads. There are two types of harmonic filters: passive filters and active filters. Passive filters are inexpensive compared with most mitigating devices. In this paper, reactance one-port compensator is designed for current harmonic mitigation. The optimal parameters the filter are determined using the Branch and Reduce Optimization Navigator (BARON) Nonlinear Programming Solver in the General Algebraic Modeling System (GAMS).
Źródło:
Electrical Power Quality and Utilisation. Journal; 2005, 11, 1; 77-82
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
IF-filters of pseudo-BL-algebras
Autorzy:
Wojciechowska-Rysiawa, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/728904.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
pseudo-BL-algebra
filter
IF-filter
prime IF-filters
pseudo-BL-chain
homomorphism
direct product
Opis:
Characterizations of IF-filters of a pseudo-BL-algebra are established. Some related properties are investigated. The notation of prime IF- filters and a characterization of a pseudo-BL-chain are given. Homomorphisms of IF-filters and direct product of IF-filters are studied.
Źródło:
Discussiones Mathematicae - General Algebra and Applications; 2015, 35, 2; 177-193
1509-9415
Pojawia się w:
Discussiones Mathematicae - General Algebra and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of the symmetrical deformation y = xk + 1 on the optimization of the symmetrical multiple channeled white light color filter
Autorzy:
Baraket, Z.
Zaghdoudi, J.
Kanzari, M.
Powiązania:
https://bibliotekanauki.pl/articles/173545.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
photonic crystals
symmetry
filter
polarization
optimization
Opis:
In this paper, we consider a hybrid photonic crystal symmetrically deformed (Bg5/Cu3/Bg5) consisting of the third generation of the copper mean sequence (Cu3), sandwiched between two Bragg mirrors at the fifth generation (Bg5). Our system realizes a polychromatic filter that transmits five wavelengths in the visible spectrum independently of the polarization of the light transverse electric or transverse magnetic. Secondly, the photonic crystal (Bg5/Cu3/Bg5) undergoes the deformation y = xk + 1 (where k is the degree of deformation, x and y are respectively the coordinates of the system before and after the deformation). With a proper choice of the degree of deformation k, this photonic crystal maintains its property of polychromatic filter whose transmission wavelength is independent of the polarization’s state. Thanks to this deformation, we can disperse the optical windows in different spectra of visible light and exactly in the violet, blue, green, and orange light. This system can be used in the fabrication of color filter devices and the white light emitting diodes.
Źródło:
Optica Applicata; 2017, 47, 1; 19-28
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pressure drop of filtering facepiece respirators: How low should we go?
Autorzy:
Kim, Jung-Hyun
Roberge, Raymond J.
Powell, Jeffrey B.
Shaffer, Ronald E.
Ylitalo, Caroline M.
Sebastian, John M.
Powiązania:
https://bibliotekanauki.pl/articles/2177016.pdf
Data publikacji:
2015-02-24
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
respirator
filter
oral breathing
nasal breathing
Opis:
Introduction This study was undertaken to determine the mean peak filter resistance to airflow (R filter) encountered by subjects while wearing prototype filtering facepiece respirators (PRs) with low Rfilter during nasal and oral breathing at sedentary and low-moderate work rates. Material and methods In-line pressure transducer measurements of mean R filter across PRs with nominal R filter of 29.4 Pa, 58.8 Pa and 88.2 Pa (measured at 85 l/min constant airflow) were obtained during nasal and oral breathing at sedentary and low-moderate work rates for 10 subjects. Results The mean R filter for the 29.4 PR was significantly lower than the other 2 PRs (p < 0.000), but there were no significant differences in mean R filter between the PRs with 58.8 and 88.2 Pa filter resistance (p > 0.05). The mean R filter was greater for oral versus nasal breathing and for exercise compared to sedentary activity (p < 0.001). Conclusions Mean oral and nasal R filter for all 3 PRs was at, or below, the minimal threshold level for detection of inspiratory resistance (the 58.8–74.5 Pa/l×s⁻¹), which may account for the previously-reported lack of significant subjective or physiological differences when wearing PRs with these low R filter. Lowering filtering facepiece respirator R filter below 88.2 Pa (measured at 85 l/min constant airflow) may not result in additional subjective or physiological benefit to the wearer.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2015, 28, 1; 71-80
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elektropneumatyczne sterowanie filtra samoczyszczącego
Electropneumatic control system for self-cleaning filter
Autorzy:
Nieśpiałowski, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/199232.pdf
Data publikacji:
2019
Wydawca:
Instytut Techniki Górniczej KOMAG
Tematy:
filtracja
filtr
filtr samoczyszczący
sterowanie
sterowanie elektropneumatyczne
filtration
filter
self-cleaning filter
control system
electropneumatic control
Opis:
W artykule przedstawiono elektropneumatyczny układ sterowania dedykowany do filtra samoczyszczącego FS-60 konstrukcji ITG KOMAG. Omówiono budowę i zasadę działania układu elektropneumatycznego. Rozwiązanie stanowi alternatywę dla istniejącego układu sterowania pneumatycznego. W artykule przedstawiono zalety i wady tego rozwiązania
The electropneumatic control system dedicated to FS-60 self-cleaning filter designed by KOMAG is presented. Design and principles of operation of the electropneumatic system is discussed. This solution is an alternative to the present pneumatic control system. Advantages and disadvantages of such a solution are given.
Źródło:
Maszyny Górnicze; 2019, 37, 3; 30-41
0209-3693
2450-9442
Pojawia się w:
Maszyny Górnicze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research the possibilities of different filters and their application to image recognition problems
Autorzy:
Brytik, V.
Grebinnik, O.
Kobziev, V.
Powiązania:
https://bibliotekanauki.pl/articles/410672.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
image analysis
contour points
filter
convolution mask
Opis:
This article is devoted to the analysis from the viewpoint of accuracy allocation of contour points, and maintaining information about the distribution of non-derivative elements. In this article is researched the edge enhancement algorithms such as Prewitt, Sobel, Laplacian, Kirsch and evaluated their work, using some well-known performance measures. Also compared the efficacy of the researched algorithms, which was determined on the selected images with superimposed noise.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2016, 5, 4; 21-27
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł

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