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Wyszukujesz frazę "hysteresis" wg kryterium: Temat


Tytuł:
Czy w Polsce występuje efekt histerezy bezrobocia?
Is There an ‘Unemployment Hysteresis’ Effect in Poland?
Autorzy:
Arendt, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/575620.pdf
Data publikacji:
2006-12-31
Wydawca:
Szkoła Główna Handlowa w Warszawie. Kolegium Analiz Ekonomicznych
Tematy:
hysteresis
unemployment
NAIRU
Opis:
The study sets out to determine if it is possible to speak of an “unemployment hysteresis” effect in Poland. The paper uses two research methods: a descriptive analysis of structural factors that maybe responsible for changes in the Non-Accelerating Inflation Rate of Unemployment (NAIRU) in Poland; and the Gordon method (1989), on the basis of which the author checks the hypothesis about the existence of unemployment hysteresis in Poland. The analysis showed that structural changes were unlikely to contribute to an increase in NAIRU. On the basis of the Gordon model the author demonstrated that there was no reason to reject the hypothesis about the occurrence of “full unemployment hysteresis” in Poland. Even though the results obtained by the author do not clearly confirm that Polish unemployment is indeed characterized by hysteresis, it seems that this lag effect may explain why Poland still suffers from high unemployment, the author notes. The hysteresis effect is primarily due to the outflow of labor and an insufficient level of human capital in the Polish economy.
Źródło:
Gospodarka Narodowa. The Polish Journal of Economics; 2006, 212, 11-12; 25-46
2300-5238
Pojawia się w:
Gospodarka Narodowa. The Polish Journal of Economics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical hysteresis tests for porcine tendons
Autorzy:
Liber-Kneć, A.
Łagan, S.
Powiązania:
https://bibliotekanauki.pl/articles/285696.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
tendons
hysteresis
viscoelastic properties
Źródło:
Engineering of Biomaterials; 2016, 19, 138; 55
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Classical and weak solutions for semilinear parabolic equations with Preisach hysteresis
Autorzy:
Jais, M.
Powiązania:
https://bibliotekanauki.pl/articles/255103.pdf
Data publikacji:
2008
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
hysteresis
parabolic
inverse problem
uniqueness
Opis:
We consider the solvability of the semilinear parabolic differential equation [formula] in a cylinder D = Ω x (0, T), where Ρ is a hysteresis operator of Preisach type. We show that the corresponding initial boundary value problems have unique classical solutions. We further show that using this existence and uniqueness result, one can determine the properties of the Preisach operator Ρ from overdetermined boundary data.
Źródło:
Opuscula Mathematica; 2008, 28, 1; 47-62
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of the technological conditions of plane surface machining on a triangular milling cutter on the residual hysteresis of the movement axis of the machine
Autorzy:
Stejskal, T.
Kráľ, J.
Rudy, V.
Melko, J.
Rjabušin, A.
Pavliková, L.
Powiązania:
https://bibliotekanauki.pl/articles/957896.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
machine tools
laser interferometer
hysteresis
Opis:
The paper deals with the possibilities of measuring the residual displacement or hysteresis on the lateral direction of the movement forces caused by the cutting forces of the machining. A special adjustment of laser interferometry assemblies was used for measurement. The measurement results indicate that the positioning accuracy in addition to the cutting forces also influences the position of the displaced moving substances and the temperature. The complex effect of these parameters is greatly dependent on the design of the machine.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 3; 240-245
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acoustic Hysteresis in Flows with Different Kinds of Relaxation and Attenuation
Autorzy:
Perelomowa, Anna
Powiązania:
https://bibliotekanauki.pl/articles/31339946.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
relaxation
acoustic hysteresis
acoustical activity
Opis:
Graphs in the thermodynamic plane acoustic pressure versus excess acoustic density representing acoustic hysteresis, are considered as indicators of relaxation processes, equilibrium parameters of a flow, and kinds of wave exciters. Some flows with deviation from adiabaticity are examined: the Newtonian flow of a thermoconducting gas, the flow of a gas with vibrational relaxation, the flow of liquid electrolyte with a chemical reaction, and the Bingham plastic flow. The total range of characteristic frequencies of a harmonic exciter is taken into account. The impulsive sound is considered as well. The peculiarities of hysteretic behaviour are discussed in dependence with the kind and degree of deviation form adiabaticity. Examples of acoustically active flows are discussed.
Źródło:
Archives of Acoustics; 2022, 47, 4; 519-527
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Higher order reversal curves in some hysteresis models
Autorzy:
Chwastek, K.
Powiązania:
https://bibliotekanauki.pl/articles/140836.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
soft magnetic materials
hysteresis
modelling
Opis:
Some physical concepts important for a hysteresis model (effective field, anhysteretic magnetization) are discussed on the example of Jiles-Atherton model. The Jiles-Atherton model reveals some drawbacks, which make this model more difficult to be applied in electrical engineering. In particular, it does not describe accurately the magnetization curves after a reversal, moreover complex magnetization cycles are poorly represented. On the other hand, the phenomenological description proposed by Takács seems to be a valuable alternative to the Jiles-Atherton formalism. The concept of effective field may be easily incorporated in the description.
Źródło:
Archives of Electrical Engineering; 2012, 61, 4; 455-470
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamiczny model histerezy magnetycznej
Dynamic model of magnetic hysteresis
Autorzy:
Wilk, A.
Powiązania:
https://bibliotekanauki.pl/articles/266978.pdf
Data publikacji:
2014
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
histereza magnetyczna
operator histerezowy
model dynamiczny Preisacha
magnetic hysteresis
hysteresis operator
dynamic Preisach model
Opis:
W referacie przedstawiono skalarny dynamiczny model histerezy magnetycznej oparty na modelu Preisacha. W modelu tym istotną rolę odgrywają stany tzw. operatorów histerezowych. W modelu dynamicznym zmiany stanów tych operatorów są pewną funkcją czasu. W funkcji tej ukryty jest także parametr k reprezentujący właściwości magnetyczne materiału. W poniższym artykule stan przejściowy operatora jest określony poprzez nieliniowe równanie różniczkowe pierwszego rzędu. Przedstawiono model dynamiczny uwzgledniający szybkość zmian parametrów materiałowych z modelem ze sprzężeniem zwrotnym. To wpływa na większą dokładność modelu zarówno przy małych jak i dużych częstotliwościach przemagnesowywania materiału. Wyznaczono wartość parametru materiałowego k dla rdzenia zwijanego z blachy transformatorowej typu ET114-27. Przedstawiono wyniki symulacji pętli histerezy przy różnych częstotliwościach przemagnesowywania rdzenia.
The paper presents the dynamic hysteresis model based on the Preisach theory. In this model the transient state of each hysteretic operator is described by differential equation. In this equation the parameter k is involved that takes into account the material properties of magnetic core. The dynamic model is coupled with feedback model to increase accuracy of simulation results. Simulations results of hysteresis loops are presented for different frequencies of the magnetic field H(t).
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2014, 40; 137-140
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of a conical sleeve with pivot joint loading of axial force
Autorzy:
Andrzejuk, A.
Skup, Z.
Zalewski, R.
Powiązania:
https://bibliotekanauki.pl/articles/949325.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
conical joint
hysteresis loop
experimental testing
Opis:
The paper presents theoretical and experimental studies of energy dissipation in a model of a conical sleeve-pivot joint. Energy dissipation between cooperating surfaces of a friction pair including structural friction, elastic and frictional effects between its elements and Lame’s problem are taken into account. A comparative analysis was conducted to compare the theoretical results obtained from numerical simulations and direct experimental data acquired from the MTS testing machine. The analysis of the influence of geometrical and material parameters, external loading on the dissipation of energy is presented too. This paper shows an outline of theoretical considerations, the method for conducting tests as well as selected comparative results.
Źródło:
Journal of Theoretical and Applied Mechanics; 2014, 52, 2; 345-358
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Curves of thermodynamic states in some fluids with dispersion
Autorzy:
Perelomova, A.
Powiązania:
https://bibliotekanauki.pl/articles/1940694.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska
Tematy:
equation of state
nonlinear acoustics
hysteresis
Opis:
Variations in the thermodynamic state of a dispersive medium, caused by sound, are studied. A bubbly liquid and a Maxwell fluid are considered as examples. Curves in the plane of thermodynamic states are plotted. They are in fact pictorial images of linear relations of excess pressure and excess density in the acoustic wave which reflect irreversible attenuation of the sound energy. The curves account for the nonlinear generation of the entropy mode in the field of sound. In the case of Maxwell fluids, loops may form under some conditions. Curves and loops for some kinds of stationary waveforms and impulse sound are discussed and compared.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2017, 21, 1; 53-64
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of the impact of probe head hysteresis on the accuracy of five-axis coordinate measuring systems
Autorzy:
Gąska, P.
Gruza, M.
Gąska, A.
Harmatys, W.
Sładek, J.
Powiązania:
https://bibliotekanauki.pl/articles/102633.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
articulating probe head
hysteresis
accuracy
CMM
Opis:
One of the factors affecting the accuracy of Coordinate Measuring Systems is hysteresis of a probe head. It is important especially in case of touch trigger probes and should be taken into account during the determination of probing strategy. In this article, the authors try to assess how this phenomenon affects the accuracy of five axis coordinate systems which utilize articulating probe head. Such systems allow to measure point coordinates using rotary movements of the head what introduces changes to the probing process. The experiments presented in this paper are based on multiple measurements of the reference elements such as gauge blocks and standard ring.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 3; 277-282
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
OTA Based Mem-capacitor Validation and Implementation Using Commercially Available IC
Autorzy:
Shankar, Chandra
Nagar, Anuj
Singh, Ashutosh
Kumar, Ankleshwar
Powiązania:
https://bibliotekanauki.pl/articles/27311977.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Memcapacitor
memristor
transconductance
mutator
tunable
hysteresis
Opis:
This paper discusses a mem-capacitor circuit which is based on two MO-OTA along with a multiplier and 4 passive elements. This circuit is a charge-controlled memcapacitor emulator which is independent of any memristor also it consists the feature of electronic tunability. Additionally, this circuit is simpler and uses less hardware because it lacks a mutator and uses fewer active-passive components. The circuit behaviour is justified through various simulations in cadence Orcad tool with 180nm CMOS TSMC parameters. Additionally, conclusions from simulations and theory are validated experimentally through commercially available IC.
Źródło:
International Journal of Electronics and Telecommunications; 2023, 69, 3; 587--592
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza wpływu zjawiska tarcia na funkcjonowanie przekładni CVT wraz z propozycją stanowiska badawczego
The influence of friction on CVT transmission functionality. New test bench proposition
Autorzy:
Goszczak, J.
Werner, A.
Powiązania:
https://bibliotekanauki.pl/articles/134857.pdf
Data publikacji:
2016
Wydawca:
ADVSEO
Tematy:
CVT transmission
friction
hysteresis
pushbelt
chain
Opis:
The paper discusses friction phenomenon between the pushbelt (or chain) in the continuously variable transmission. This type of transmission is becoming more and more popular. It is so due to the technical progress last years and its indisputable advantage over conventional transmissions. It enables us to use the full characteristic of the engine. The introduction describes the issue, principles of the transmission’s operation, the construction of the steel pushbelt and a scheme of forces acting on a single belt’s steel element (segment). In the next part, the article explains the need of researches and their impact on the transmission’s proceeding. Moreover, a simplified model of the test bench with description of the proposed tests needed to elaborate sought relationships is included in the paper.
Źródło:
Technical Issues; 2016, 4; 15-20
2392-3954
Pojawia się w:
Technical Issues
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hysteresis Modeling Using a Preisach Operator
Autorzy:
Bilski, A.
Twardy, M.
Powiązania:
https://bibliotekanauki.pl/articles/226738.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Preisach operator
hysteresis
probability density function
Opis:
The aim of this paper is to present the analysis and modeling of the hysteresis phenomenon using a Preisach operator. The fundamentals of parameterized hysteresis modeling are introduced, by utilizing three probability density functions. Then, the Preisach operator and its characteristics are defined. Subsequently, results of simulations obtained by means of the aforementioned functions are presented and compared to the ones obtained by other authors.
Źródło:
International Journal of Electronics and Telecommunications; 2010, 56, 4; 473-478
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Single sheet tester for measuring core losses with novel adaptive algorithm of waveform
Autorzy:
Lerch, Tomasz
Rad, Michał
Rams, Witold
Powiązania:
https://bibliotekanauki.pl/articles/2172795.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
core losses
efficiency
Epstein
hysteresis
magnetization
Opis:
This paper presents a novel method of waveform generation in a single-sheet tester (SST) for measuring core losses and permeability in a steel sheet. Some improvements and modifications of the apparatus are also described. The improved way of working of a SST is important, especially in the extended range of polarization (up to 1.9 T). The system consists of hardware and software. Everything together was tested and has given good results. The proposed algorithm is described and compared to previously known methods.
Źródło:
Archives of Electrical Engineering; 2022, 71, 4; 851--864
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mobile ferrograph system for ultrahigh permeability alloys
Autorzy:
Charubin, T.
Nowicki, M.
Marusenkov, A.
Szewczyk, R.
Nosenko, A.
Kyrylchuk, V.
Powiązania:
https://bibliotekanauki.pl/articles/384845.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
ferrograph
hysteresis
amorphous alloys
mobile measurement system
Opis:
This paper presents a mobile ferrograph system for measurement of magnetic parameters of ultrahigh permeability alloys. The structure of developed system is described, as well as exemplary measurement results of Co67Fe3Cr3B12Si15 alloy used in space applications are presented.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2018, 12, 3; 40-42
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł

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