Skocz do pozycji: 1.

Tytuł:

Necessary Thermodynamics Factors to Obtain Simple Solid Solutions in High-Entropy Alloys from the Al-Ti-Co-Ni-Fe System

Autorzy:

Górecki, K.
Bała, P.
Kozieł, T.
Cios, G.

Powiązania:

https://bibliotekanauki.pl/articles/356241.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

High-Entropy Alloys
entropy
enthalpy
VEC
solid solution

Opis:

In this paper findings regarding the design and synthesis of High-Entropy Alloys based on mixing enthalpy, mixing entropy, δ parameter, Ω parameter and valence electron concentration are presented. Four alloys were synthesised with different predicted crystalline structures. Results of the microstructure and crystal structure studies are presented. It was shown that predicted structures as well as complex intermetallic phases exist in the material. The validity of valence electron concentration as well as additional parameters such as mixing enthalpy, mixing entropy and others necessary to obtain only the solid solution in High-Entropy Alloys were examined.

Źródło:

Archives of Metallurgy and Materials; 2017, 62, 4; 2141-2145
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 2.

Tytuł:

Kierunek przebiegu spontanicznych procesów i zjawisk w odosobnionych układach. Różne pojęcia entropii
Direction of spontaneous processes and phenomena in isolated systems. Different concepts of entropy

Autorzy:

Kozioł, Joachim

Powiązania:

https://bibliotekanauki.pl/articles/27323737.pdf

Data publikacji:

2023

Wydawca:

STE GROUP

Tematy:

przebieg procesów i zjawisk
entropia fenomenologiczna
entropia statystyczna
entropia cybernetyczna
entropia ekonomiczna
entropia filozoficzna
course of processes and phenomena
entropy phenomenological
entropy statistical
entropy cybernetic
entropy economic
entropy philosophical

Opis:

Bazując na, tak zwanej, drugiej zasadzie i związanym z nią kierunkiem przebiegu spontanicznych procesów z zakresu termodynamiki fenomenologicznej i statystycznej, w odosobnionych układach, omówiono podobne kierunki dotyczące innych dziedzin życia. Szczególną uwagę poświęcono pojęciu entropii, charakteryzującej powyższe kierunki. Rozważaniami, obok zjawisk przyrodniczych (fizyczno-chemicznych i biologicznych), objęto procesy cybernetyczne, ekonomiczne oraz zjawiska filozoficzne. Wskazano na występowanie dużej analogii zachowań tematycznego kierunku w analizowanych obszarach.
Based on the so-called second law and the related course of spontaneous processes in the field of phenomenological and statistical thermodynamics in isolated systems, similar directions in other areas of life were discussed. Particular attention was paid to the concept of entropy, which characterizes the above directions. The considerations, apart from natural phenomena (physico-chemical and biological), included cybernetic and economic processes as well as philosophical phenomena. The presence of a large analogy in the behavior of the thematic direction in the analyzed areas was indicated.

Źródło:

Systemy Wspomagania w Inżynierii Produkcji; 2023, 12, 1; 36--45
2391-9361

Pojawia się w:

Systemy Wspomagania w Inżynierii Produkcji

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 3.

Tytuł:

On Sequence Entropy of Thue-Morse Shift

Autorzy:

Foryś, Magdalena

Powiązania:

https://bibliotekanauki.pl/articles/1373719.pdf

Data publikacji:

2013

Wydawca:

Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego

Tematy:

entropy
Thue-Morse sequence
sequence entropy
pattern
pattern complexity

Opis:

The paper summarizes properties of topological and sequence en- tropy of the Morse shift $X_\M$ generated by the Thue-Morse sequence $t_M$. The first part is an estimation of growth rate of possible subwords in $t_M$. We show a polynomial upper bound on the number of finite subwords occuring in $t_M$ which is $Cn^{2 log 3}$ for some constant $C > 0$. In the second part we prove that the sequence entropy of $X_M$ is achieved for the sequence $r (i) = 2^{2i} − 1$.

Źródło:

Schedae Informaticae; 2013, 22; 19-25
0860-0295
2083-8476

Pojawia się w:

Schedae Informaticae

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 4.

Tytuł:

Strictly ergodic Toeplitz flows with positive entropies and trivial centralizers

Autorzy:

Bułatek, Wojciech
Kwiatkowski, Jan

Powiązania:

https://bibliotekanauki.pl/articles/1293080.pdf

Data publikacji:

1992

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

Toeplitz flows
entropy

Opis:

A class of strictly ergodic Toeplitz flows with positive entropies and trivial topological centralizers is presented.

Źródło:

Studia Mathematica; 1992, 103, 2; 133-142
0039-3223

Pojawia się w:

Studia Mathematica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 5.

Tytuł:

On the properties of the Generalized Normal Distribution

Autorzy:

Toulias, Thomas
Kitsos, Christos

Powiązania:

https://bibliotekanauki.pl/articles/729804.pdf

Data publikacji:

2014

Wydawca:

Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii

Tematy:

entropy type Fisher's information
Shannon entropy
Normal distribution
truncated distribution

Opis:

The target of this paper is to provide a critical review and to enlarge the theory related to the Generalized Normal Distributions (GND). This three term (position, scale shape) distribution is based in a strong theoretical background due to Logarithm Sobolev Inequalities. Moreover, the GND is the appropriate one to support the Generalized entropy type Fisher's information measure.

Źródło:

Discussiones Mathematicae Probability and Statistics; 2014, 34, 1-2; 35-49
1509-9423

Pojawia się w:

Discussiones Mathematicae Probability and Statistics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 6.

Tytuł:

Assessment of airside aerodrome infrastructure by SAW method with weights from Shannons interval entropy

Autorzy:

Żak, Jolanta
Gołda, Paweł
Cur, Krzysztof
Zawisza, Tomasz

Powiązania:

https://bibliotekanauki.pl/articles/2067399.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

entropy
aerodrome infrastructure
SAW

Opis:

Multi-criteria decision support (MCDM) methods are widely used in many areas of science. This applies to economic, social and technical sciences. Implementing activities at the strategic, tactical or operational level requires appropriate tools to support decision-makers. The use of these tools requires the preparation of a decision model along with the formalization of the goal and the acquisition and preparation of data to make the decision accurate. Due to the wide application of MCDM in engineering practice, the article presents their application in air transport. It is an area that is constantly evolving, and all decisions at the strategic level have long-term effects and must be adequately justified. In the paper a compartmental extension of the classical SAW method with weights obtained using the compartmental Shannon entropy was proposed. This paper presents issues concerning the choice of airport layout and describes the problems that occur in determining the cost and capacity of airports. This paper reviews the literature on airport capacity and operations and airside air transport processes and the application of various multi-criteria decision support methods to airport problems. The main part of the article contains an optimization mathematical model aimed at determining the parameters of the elements comprising the airport, on the basis of which a simulation model was developed and a modified method of multi-criteria evaluation of SAW taking into account the interval numbers was presented, in which the set of weights was estimated by the Shannon entropy method. In the application part for 3 variants of the airport arrangement, the parameters were determined in the form of interval numbers and then evaluated using the presented method. The presented numerical example shows that the proposed method is an excellent tool to assist in solving complex decision problems where the data are imprecise and represented by interval numbers.

Źródło:

Archives of Transport; 2021, 60, 4; 171--185
0866-9546
2300-8830

Pojawia się w:

Archives of Transport

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 7.

Tytuł:

The use of Lempel-Ziv complexity to analyze turbulence and flow randomness based on velocity fluctuations

Autorzy:

Blonski, S.
Pregowska, A.
Michalek, T.
Szczepanski, J.

Powiązania:

https://bibliotekanauki.pl/articles/201218.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

turbulence
complexity
entropy
randomness

Opis:

One of the mathematical tools to measure the generation rate of new patterns along a sequence of symbols is the Lempel-Ziv complexity (LZ). Under additional assumptions, LZ is an estimator of entropy in the Shannon sense. Since entropy is considered as a measure of randomness, this means that LZ can be treated also as a randomness indicator. In this paper, we used LZ concept to the analysis of different flow regimes in cold flow combustor models. Experimental data for two combustor’s configurations motivated by efficient mixing need were considered. Extensive computer analysis was applied to develop a complexity approach to the analysis of velocity fluctuations recorded with hot-wire anemometry and PIV technique. A natural encoding method to address these velocity fluctuations was proposed. It turned out, that with this encoding the complexity values of the sequences are well correlated with the values obtained by means of RMS method (larger/smaller complexity larger/smaller RMS). However, our calculations pointed out the interesting result that most complex, this means most random, behavior does not overlap with the “most turbulent” point determined by the RMS method, but it is located in the point with maximal average velocity. It seems that complexity method can be particularly useful to analyze turbulent and unsteady flow regimes. Moreover, the complexity can also be used to establish other flow characteristics like its ergodicity or mixing.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 5; 957-962
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 8.

Tytuł:

Time weighted entropies

Autorzy:

Schmeling, Jörg

Powiązania:

https://bibliotekanauki.pl/articles/965770.pdf

Data publikacji:

2000

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

topological entropy
symbolic dynamics

Opis:

For invertible transformations we introduce various notions of topological entropy. For compact invariant sets these notions are all the same and equal the usual topological entropy. We show that for non-invariant sets these notions are different. They can be used to detect the direction in time in which the system evolves to highest complexity.

Źródło:

Colloquium Mathematicum; 2000, 84/85, 1; 265-278
0010-1354

Pojawia się w:

Colloquium Mathematicum

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 9.

Tytuł:

Entropy Production in the Stationary Eutectic Growth

Autorzy:

Wołczyński, W.

Powiązania:

https://bibliotekanauki.pl/articles/355900.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

regular eutectics growth
entropy production
criterion of minimum entropy production
Growth Law

Opis:

The entropy production per unit time is calculated for the regular lamellae -, and for the regular rods formation, respectively. The entropy production is a function of some parameters which define the eutectic phase diagram, coefficient of the diffusion in the liquid, and some capillary parameters connected with the mechanical equilibrium located at the triple point of the solid/liquid interface. Minimization of the entropy production allowed to formulate mathematically the so-called Growth Law for both envisaged eutectic morphologies.

Źródło:

Archives of Metallurgy and Materials; 2020, 65, 1; 403-416
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 10.

Tytuł:

Canonical distributions and phase transitions

Autorzy:

Athreya, K
Smith, J

Powiązania:

https://bibliotekanauki.pl/articles/729916.pdf

Data publikacji:

2000

Wydawca:

Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii

Tematy:

canonical distribution
canonical ensemble
Gibbs state
phase transition
entropy maximization
Rényi entropy

Opis:

Entropy maximization subject to known expected values is extended to the case where the random variables involved may take on positive infinite values. As a result, an arbitrary probability distribution on a finite set may be realized as a canonical distribution. The Rényi entropy of the distribution arises as a natural by-product of this realization. Starting with the uniform distributionon a proper subset of a set, the canonical distribution of equilibriumstatistical mechanics may be used to exhibit an elementary phase transition, characterized by discontinuity of the partition function.

Źródło:

Discussiones Mathematicae Probability and Statistics; 2000, 20, 2; 167-176
1509-9423

Pojawia się w:

Discussiones Mathematicae Probability and Statistics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 11.

Tytuł:

Second law optimization and parametric study of a solar air heater having artificially roughened absorber plate

Autorzy:

Sahu, Mukesh Kumar
Prasad, Radha Krishna

Powiązania:

https://bibliotekanauki.pl/articles/240023.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

artificial roughness
entropy generation
entropy generation minimization
augmentation entropy generation number
solar air heater
źródło entropii
minimalizacja
powietrzny kolektor słoneczny

Opis:

In present article a mathematical model of arc shape wire roughened solar air heater, on the basis of energy and exergy output rates, entropy generation rate and augmentation entropy generation number, has been developed. A parametric study leading to entropy generation minimization has also been performed. In the analysis the geometric and operating parameters which have been considered as variable are: inlet air temperature, duct depth, collector width to duct depth ratio, mass flow rate per unit collector area, and temperature rise parameter. Results have been presented to see the effects of these values on the energy and exergy output rates of the roughened solar air heater. Effect of different values of wire rib roughness parameters on entropy generation has also been presented. Finally, design curves and optimization for different rib roughness parameters on the basis of minimum entropy generation number with temperature rise parameter, have been presented and optimum values also have been found out 0.004 to 0.010 (Km2 )/W. The entropy generation rate obtained for the system, in the present work has been compared with those obtained for solar air heater with different roughness geometries on absorber plates available in the literature for common roughness parameters and operating parameters which validate the present results.

Źródło:

Archives of Thermodynamics; 2019, 40, 2; 107-135
1231-0956
2083-6023

Pojawia się w:

Archives of Thermodynamics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 12.

Tytuł:

Wykorzystanie entropii Shannona i jej uogólnień do badania rozkładu prawdopodobieństwa zmiennej losowej dyskretnej
Application of Shannon’s Entropy and its Generalizations for Studies on the Discrete Random Variable Probability Distribution

Autorzy:

Wędrowska, Ewa

Powiązania:

https://bibliotekanauki.pl/articles/1830300.pdf

Data publikacji:

2010-12-31

Wydawca:

Główny Urząd Statystyczny

Tematy:

entropia Shannona
entropia Rényiego
entropia Havrda-Charvát-Daróczy-Tsallisa
miary koncentarcji
Shannon’s entropy
Rényi’s entropy
Tsallis entropy
concentration measure

Opis:

O entropii można mówić wszędzie tam, gdzie istnieje potrzeba rozpoznania i zmierzenia nieokreśloności badanych rozkładów zmiennych losowych. Potrzeba zmierzenia stopnia koncentracji występuje w badaniu wielu systemów, procesów czy zjawisk, w szczególności w badaniu zjawisk społeczno-ekonomicznych. Właśnie dlatego w badaniu tychże zjawisk coraz częściej wykorzystuje się miary zdefiniowane na gruncie teorii informacji. W artykule zaprezentowano pojęcia i własności entropii zmiennej losowej dyskretnej. Wykorzystano entropię Shannona wraz z jej uogólnieniami (entropią Rényiego i Tsallisa) do badania własności rozkładów prawdopodobieństw dyskretnych zmiennych losowych. Wskazano ponadto na liczne związki miar koncentracji dyskretnego rozkładu prawdopodobieństwa z entropią. W artykule zaproponowano miarę umożliwiającą ocenę stopnia koncentracji dyskretnego rozkładu prawdopodobieństwa będącą funkcją entropii Rényiego.
Everywhere where there is need for identification and measurement of indeterminacy of the distributions studied we can talk about entropy. The need to measure the degree of diversity occurs in studies on numerous systems, processes and phenomena, in particular in studies on socioeconomic phenomena. That is why in studies on those phenomena the measures or models defined on grounds of the information theory are used increasingly often. The paper presents categorization of notions and characteristics of the entropy of a discrete random variable. In addition to Shannon’s entropy, the Rényi’s and Tsallis entropies were applied for studies on the properties of distributions in case of probabilities of the random variables. The notion of entropy stemming from thermodynamics found application in many fields of sciences. Shannon’s entropy was defined on the grounds of the information theory, the Rényi’s entropy is the result of generalization of the Kolmogorov-Nagumo average while the Tsallis entropy is a certain function of Rényi’s entropy. The present paper unifies these approaches by presenting one general model of concentration measure that applies Rényi’s entropy.

Źródło:

Przegląd Statystyczny; 2010, 57, 4; 39-53
0033-2372

Pojawia się w:

Przegląd Statystyczny

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 13.

Tytuł:

Synteza i badanie tlenków wysokoentropowych (HEO) jako materiałów o dużym potencjale w technice termoelektrycznej
Synthesis and Testing of High Entropy Oxides (HEO) as Materials with Great Potential in Thermoelectric TechnologyProcess

Autorzy:

Kozanecki, Michał
Lipiński, Tomasz
Nowacki, Krzysztof

Powiązania:

https://bibliotekanauki.pl/chapters/28262929.pdf

Data publikacji:

2023-12-14

Wydawca:

Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej

Tematy:

entropia
termoelektryk
tlenek wysokoentropowy
współczynnik Seebecka
entropy
thermoelectric
high entropy oxide
Seebeck coefficient

Opis:

Tematyką niniejszego rozdziału jest opis syntezy tlenków wysokoenetropowych oraz pokazanie ich potencjału jako materiałów do budowy termogeneratorów. W pracy zsyntetyzowano 8 przedstawicieli tej grupy związków, o składzie chemicznym zapewniającym wysoki współczynnik Seebecka. Badania polegały na zsyntezowaniu tlenków wysokoentropowych o wzorach: (Ba0,2Sr0,2Pb0,2Ca0,2La0,2)TiO3; (Ba0,2Sr0,2Ca0,2Pb0,2La0,2)(Ti0,5Fe0,5)O3; (Ba0,2Sr0,2Ca0,2Pb0,2La0,2)(Ti0,5Co0,5)O3; (Ba0,2Sr0,2Ca0,2Pb0,2La0,2)(Fe0,5Co0,5)O3; (Ba0,2Sr0,2Ca0,2Pb0,2La0,2)FeO3; (Ba0,2Sr0,2Ca0,2Pb0,2La0,2)CoO3. Główną motywacją przeprowadzonych badań było wytworzenie tanich oraz efektywnych materiałów, które można by wykorzystać do budowy termogeneratorów. W rozdziale przedstawiono i opisano proces syntezy w fazie stałej. Zaprezentowano również warunki syntezy i problemy wynikłe podczas przeprowadzonych syntez oraz możliwe rozwiązania problemów, a także pomiary współczynnika Seebecka próbki o wzorze: (Ba0,2Sr0,2Pb0,2Ca0,2La0,2)TiO3 w różnych temperaturach. Podczas badań termoelektrycznych otrzymano bardzo wysoki współczynnik Seebecka, dochodzący do –3000 μV/K w temperaturze 750 K. Z przedstawionych badań wynika, że badane tlenki wysokoentropowe posiadają duży potencjał do zastosowania w urządzeniach wykorzystujących zjawiska termoelektryczne.
The subject of the chapter is a description of the synthesis of high entropic oxides and showing their potential as materials for the construction of thermogenerators. In this work 8 representatives of this group of compounds were synthesized, with a chemical composition ensuring a high Seebeck coefficient. The research involved the synthesis of high entropy oxides with the formulas: (Ba0,2Sr0,2Pb0,2Ca0,2La0,2)TiO3; (Ba0,2Sr0,2Ca0,2Pb0,2La0,2)(Ti0,5Fe0,5)O3; (Ba0,2Sr0,2Ca0,2Pb0,2La0,2)(Ti0,5Co0,5)O3; (Ba0,2Sr0,2Ca0,2Pb0,2La0,2)(Fe0,5Co0,5)O3; (Ba0,2Sr0,2Ca0,2Pb0,2La0,2)FeO3; (Ba0,2Sr0,2Ca0,2Pb0,2La0,2)CoO3 The main motivation for the research was to produce cheap and effective materials that could be used to build thermogenerators. The paper presents and describes the solid-phase synthesis process. The synthesis conditions and problems arising during the performed syntheses, as well as possible solutions to the problem are also presented. Paper also presents measurements of Seebeck coefficient of sample with formula (Ba0,2Sr02, Pb0,2Ca0,2La0,2)TiO3. in different temperature. During thermoelectric tests, a very high Seebeck coefficient was obtained, reaching up to –3000 μV/K in temperature of 750K. The presented research shows that the tested high-entropy oxides (HEO) have great potential for use in devices using thermoelectric phenomena.

Źródło:

Potencjał innowacyjny w inżynierii materiałowej i zarządzaniu produkcją; 151-160
9788371939457

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 14.

Tytuł:

Is there a limit of matter divisibility?

Autorzy:

Jacyna-Onyszkiewicz, Zbigniew

Powiązania:

https://bibliotekanauki.pl/articles/703143.pdf

Data publikacji:

2007

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

black hole
entropy
holographic principle

Opis:

Investigation of the thermal properties of the black holes by the quantum statistical mechanics has implied that matter cannot be divided to infinity because the number of independent parameters completely describing a subject of a limited volume is finite.

Źródło:

Nauka; 2007, 3
1231-8515

Pojawia się w:

Nauka

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 15.

Tytuł:

Entropy of foliations with leafwise Finsler structure

Autorzy:

Michalik, I.
Walczak, S.

Powiązania:

https://bibliotekanauki.pl/articles/254729.pdf

Data publikacji:

2016

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

geometric entropy
leafwise Finsler structure

Opis:

We extend the notion of the geometric entropy of foliation to foliated manifolds equipped with leafwise Finsler structure. We study the relation between the geometric entropy and the topological entropy of the holonomy pseudogroup. The case of a foliated manifold with leafwise Randers structure is considered. In this case the estimates for one dimensional foliation defined by a vector field in terms of the topological entropy of a flow are presented.

Źródło:

Opuscula Mathematica; 2016, 36, 4; 499-512
1232-9274
2300-6919

Pojawia się w:

Opuscula Mathematica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 16.

Tytuł:

Fast Optimization of Multithreshold Entropy Linear Classifier

Autorzy:

Józefowicz, Rafał
Czarnecki, Wojciech Marian

Powiązania:

https://bibliotekanauki.pl/articles/1373582.pdf

Data publikacji:

2014

Wydawca:

Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego

Tematy:

multithreshold classifier
entropy
approximation
optimization

Opis:

Multithreshold Entropy Linear Classifier (MELC) is a density based model which searches for a linear projection maximizing the Cauchy-Schwarz Divergence of dataset kernel density estimation. Despite its good empirical results, one of its drawbacks is the optimization speed. In this paper we analyze how one can speed it up through solving an approximate problem. We analyze two methods, both similar to the approximate solutions of the Kernel Density Estimation querying and provide adaptive schemes for selecting a crucial parameters based on user-specified acceptable error. Furthermore we show how one can exploit well known conjugate gradients and L-BFGS optimizers despite the fact that the original optimization problem should be solved on the sphere. All above methods and modifications are tested on 10 real life datasets from UCI repository to confirm their practical usability.

Źródło:

Schedae Informaticae; 2014, 23; 57-67
0860-0295
2083-8476

Pojawia się w:

Schedae Informaticae

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 17.

Tytuł:

Méthodes de réalisation de produit scalaire et de problème de moments avec maximisation dentropie

Autorzy:

Girardin, Valerie

Powiązania:

https://bibliotekanauki.pl/articles/1219610.pdf

Data publikacji:

1997

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

moments
scalar product
entropy maximization

Opis:

We develop several methods of realization of scalar product and generalized moment problems. Constructions are made by use of a Hilbertian method or a fixed point method. The constructed solutions are rational fractions and exponentials of polynomials. They are connected to entropy maximization. We give the general form of the maximizing solution. We show how it is deduced from the maximizing solution of the algebraic moment problem.

Źródło:

Studia Mathematica; 1997, 124, 3; 199-213
0039-3223

Pojawia się w:

Studia Mathematica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 18.

Tytuł:

Change in entropy of the spinning black holes

Autorzy:

Mahto, D.
Singh, A. S.
Vineeta, K.
Kumar, A.

Powiązania:

https://bibliotekanauki.pl/articles/411895.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Event-horizon
AGN
Entropy & Energy

Opis:

Aims: To derive an expression for change in entropy of spinning black holes on the basis of the model for the energy of spinning black holes E _BHs= K_BHs R'_s ( Mahto et al. 2011a) & the model for entropy change δS _bh = [wzór]δE ( Mahto et al. 2011b) and then calculate their values for different test spinning black holes. Study Design: Data for the mass of black holes have collected from the research paper entitled :Super massive Black Holes in Galactic Nuclei: Past Present & Future Research(2005), Space Science Reviews by L. Ferrarese & H. Ford and Black holes in Astrophysics(2005), New Journal Physics by R. Narayan. The data for black hole constant for spinning black holes (K _BHs = 1.214x10⁴⁴) is taken from the paper entitled: Study of Schwarzschild radius with reference to the spinning black holes. Bulletin of Pure and Applied Sciences (2011a). Place and Duration of Study: Department of Physics, Marwari College Bhagalpur and University Department of Physics, T.M.B.U. Bhagalpur, between December 2013 and March 2014. Methodology: A theoretical based work using Laptop to calculate the calculation for change in entropy of different test spinning black holes at Marwari College Bhagalpur and the residential research chamber of the first author. Results: The calculation shows that the change in entropy of spinning black holes of the rest masses for stellar – mass black holes (M ~ 5 – 20 Mʘ) in X-ray binaries is 2.483x10 ⁶³ to 39.731x10 ⁶³ J/K and for the super massive Black holes (M ~ 10 ⁶ – 10^9.5 Mʘ) in active galactic nuclei is 9.932x10 ⁷³ to 28.432x10 ⁸⁰ J/K. The nature of the graph for XRBs is the same to the Hawking entropy with the event horizon and straight line for AGN which confirms the validity of equations E_BHs=K_BHs R’_{s and δS bh = [wzór]δE .Conclusion: The change in energy and entropy of black holes are mainly dependent on the mass and independent of their event horizons.}

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2014, 13, 2; 95-103
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 19.

Tytuł:

Change in energy and entropy of the non-spinning black holes

Autorzy:

Mahto, D.
Khan, T. A.
Kumar, A.
Sah, R. K.

Powiązania:

https://bibliotekanauki.pl/articles/412037.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

event-horizon
AGN
Entropy & Energy

Opis:

In the present paper, we have derived an expression for change in entropy of non-spinning black holes on the basis of formula (EBH = KBHRS) as proposed by Kanak Kumari et al. (2010) and the formula δSbh= 2π/(k.c^2 ) δE (Mahto et al., 2011) and calculated their values for different test non-spinning black holes.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2014, 4; 12-19
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 20.

Tytuł:

An entropy based non-wrapper approach for choosing variables in cluster analysis

Autorzy:

Korzeniewski, Jerzy

Powiązania:

https://bibliotekanauki.pl/articles/657955.pdf

Data publikacji:

2011

Wydawca:

Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego

Tematy:

cluster analysis
entropy
variable choice

Opis:

W artykule badamy sprawność algorytmu wybierania zmiennych w analizie skupień opartego na entropii (por. Dash, Liu, 2000). Ocena oparta jest na eksperymencie, w którym zbiory generowane są w postaci mieszanin rozkładów normalnych. Wyniki wskazują na to. że metoda nie radzi sobie tak dobrze jak to sugerowali Autorzy.

Źródło:

Acta Universitatis Lodziensis. Folia Oeconomica; 2011, 255
0208-6018
2353-7663

Pojawia się w:

Acta Universitatis Lodziensis. Folia Oeconomica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 21.

Tytuł:

Maximum entropy generation rate in a heat exchanger at constant inlet parameters

Autorzy:

Laskowski, R.
Jaworski, M.

Powiązania:

https://bibliotekanauki.pl/articles/95303.pdf

Data publikacji:

2017

Wydawca:

Politechnika Koszalińska. Wydawnictwo Uczelniane

Tematy:

maximum entropy generation rate
entropy
heat exchanger
maksymalna szybkość generowania entropii
entropia
wymiennik ciepła

Opis:

The main goal of the paper is to provide a condition for which a maximum entropy generation occurs in a heat exchanger at constant inlet parameters (temperatures and mass flow rates). Knowing this condition is essential during the design of the heat exchanger as it allows designers to avoid one of its most unfavourable operating conditions in terms of thermodynamics. Entropy generation resulting from the resistance of heat-transferring fluids to flow was not taken into account. Entropy generation was analysed as a function of a heat flow rate at constant parameters at the inlet of a condenser and a counter-flow double-pipe heat exchanger. The analysis showed that for the condenser the entropy generation rate increases with the increase in the heat flow rate. The maximum entropy generation rate occurs for the maximum flow rate of the heat that can be transferred according to the definition of heat transfer effectiveness. For the counter-flow heat exchanger, the entropy generation as a function of the heat flow rate reaches maximum at constant inlet parameters (temperatures and mass flow rates). It appeared that the peak entropy generation, or the largest exergy loss, occurs when the outlet temperatures of the fluids are equal. This assertion was verified against data obtained from a simulator of the counter-flow heat exchanger for two different relations between heat capacity rates.

Źródło:

Journal of Mechanical and Energy Engineering; 2017, 1, 1; 79-86
2544-0780
2544-1671

Pojawia się w:

Journal of Mechanical and Energy Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 22.

Tytuł:

Information Quantity Estimation of Multiplex Measurement Instrumentation
Ocena ilości informacji w wielokanałowych systemach pomiarowych

Autorzy:

Ivakhiv, O.

Powiązania:

https://bibliotekanauki.pl/articles/154617.pdf

Data publikacji:

2003

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

ilość informacji
wielokanałowy system pomiarowy
szybkość opracowania informacji
entropy
multichannel system
entropy estimation parameters

Opis:

The measurement instrumentation theory methodology makes it possible to take into acount both the metrological requirements to the restoration of measurement signal as well as to the measurement object dynamic properties.The information quantity, received from a certain measuring channel is defined as a difference between an initial (prior to the measuring) and a conditional (following the measuring) intropies which are based on the corresponding distributions laws. The measurement object information quantity received by the multiplex instrument with the needed accuracy is estimated.
Rozwój techniki komputerowej oraz informatyki spowodowały, z jednej strony, wprowadz. mikroprocesorów w strukturę przyrządu pomiarowego, a z drugiej strony - wykorzystywanie pojęć teorii informacji przy analizie procesów pomiarowych. Miernictwo coraz bardziej staje się dziedziną interdyscyplinarną. Z punktu widzenia informacyjnej teorii pomiaru można ocenić ilość informacji pobranej za pomocą przyrządu pomiarowego od obiektu badanego. W proponowanym artykule metodologia obliczenia ilości informacji dla przyrządu jednokanałowego została rozszerzona na wielokanałowy przyrząd czyli system pomiarowy. Przy założeniu modelu sygnału pomiarowego w postaci losowego stacjonarnego procesu z normalnym rozkładem gęstości prawdopodobieństwa i ograniczonym pasmem amplitudowym oraz z normalnym rozkładem błędu pomiarowego znaleziono zależności dla obliczenia ilości informacji. Te oceny pozwalają uwzględnic dynamiczne właściwosci obiektu badanego oraz metrologiczne kryteria oceny jego stanu. Zostały sformułowane również kryteria dotyczące szybkości przetwarzania tej informacji przez przyrząd cyfrowy. Ustalono, iż informacyjną efektywność można zwiększyć przez zmniejszenie wymagań co do szybkości przetwarzania informacji pomiarowej oraz mocy sygnału pomiarowego.

Źródło:

Pomiary Automatyka Kontrola; 2003, R. 49, nr 7-8, 7-8; 43-46
0032-4140

Pojawia się w:

Pomiary Automatyka Kontrola

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 23.

Tytuł:

Income inequality of households in Poland: A subgroup decomposition of generalized entropy measures
Nierówności dochodowe gospodarstw domowych w Polsce: dekompozycja miar uogólnionej entropii

Autorzy:

Muszyńska, Joanna
Wędrowska, Ewa

Powiązania:

https://bibliotekanauki.pl/articles/424900.pdf

Data publikacji:

2018

Wydawca:

Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu

Tematy:

income inequality
General Entropy measures
decomposition

Opis:

A formula of measures applied to assess the level of income inequality results from the intellectual basis on which this approach is founded. Our paper focuses on Generalized Entropy measures. The aim of our paper is two-fold. Firstly, it aims at presenting GE measures and discussing their properties, especially the property of additive decomposition. Secondly, the empirical aim is to assess the level of income inequality in Poland and to indicate its main determinants. In the study we use microdata obtained from EU-SILC that cover information about incomes received by individual household members in 2016. Five factors are chosen as the possible drivers of income inequality. The study proves the characteristics related to human capital are the most influential factors of income variability between households. The characteristics describing the composition of the household contribute to the overall level of inequality to a smaller extent.

Źródło:

Econometrics. Ekonometria. Advances in Applied Data Analytics; 2018, 22, 4; 43-64
1507-3866

Pojawia się w:

Econometrics. Ekonometria. Advances in Applied Data Analytics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 24.

Tytuł:

On Korenblum convex functions

Autorzy:

Lopez, Lorena Maria
Ereú, Jurancy
Merentes, Nelson

Powiązania:

https://bibliotekanauki.pl/articles/960142.pdf

Data publikacji:

2017

Wydawca:

Polskie Towarzystwo Matematyczne

Tematy:

Convex function
generalized convexity
k-entropy

Opis:

We introduce a new class of generalized convex functions called the κ-convex functions, based on Korenblum's concept of κ-decreasing functions, where κ is an entropy (distortion) function. We study continuity and differentiability properties of these functions, and we discuss a special subclass which is a counterpart of the class of so-called d.c. functions. We characterize this subclass in terms of the space of functions of bounded second κ-variation, extending a result of F. Riesz. We also present a formal structural decomposition result for the κ-convex functions.

Źródło:

Commentationes Mathematicae; 2017, 57, 1
0373-8299

Pojawia się w:

Commentationes Mathematicae

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 25.

Tytuł:

On entropy of patterns given by interval maps

Autorzy:

Bobok, Jozef

Powiązania:

https://bibliotekanauki.pl/articles/1205185.pdf

Data publikacji:

1999

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

interval map
topological entropy
cycle
pattern

Opis:

Defining the complexity of a green pattern exhibited by an interval map, we give the best bounds of the topological entropy of a pattern with a given complexity. Moreover, we show that the topological entropy attains its strict minimum on the set of patterns with fixed eccentricity m/n at a unimodal X-minimal case. Using a different method, the last result was independently proved in[11].

Źródło:

Fundamenta Mathematicae; 1999, 162, 1; 1-36
0016-2736

Pojawia się w:

Fundamenta Mathematicae

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 26.

Tytuł:

Minimal self-joinings and positive topological entropy II

Autorzy:

Blanchard, François
Kwiatkowski, Jan

Powiązania:

https://bibliotekanauki.pl/articles/1218579.pdf

Data publikacji:

1998

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

topological coalescence
self-joinings
topological entropy

Opis:

An effective construction of positive-entropy almost one-to-one topological extensions of the Chacón flow is given. These extensions have the property of almost minimal power joinings. For each possible value of entropy there are uncountably many pairwise non-conjugate such extensions.

Źródło:

Studia Mathematica; 1998, 128, 2; 121-133
0039-3223

Pojawia się w:

Studia Mathematica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 27.

Tytuł:

On-line Student Emotion Monitoring as a Model of Increasing Distance Learning Systems Efficiency

Autorzy:

Miljković, Boža D.
Petojević, Aleksandar V.
Žižović, Mališa R.

Powiązania:

https://bibliotekanauki.pl/articles/1998304.pdf

Data publikacji:

2017-03-31

Wydawca:

Wydawnictwo Adam Marszałek

Tematy:

distance learning
entropy
emotion intensity
homogeneity

Opis:

Modern concepts of education are increasingly focused on e-learning and distance learning. Expectations from them are at least the same efficiency, but also results higher than those obtained by the traditional education system. In distance learning systems the modules of assistants (tutors, helpers) are very important. They provide immediate feedback both to the student and the distance learning system. Tracking and recognizing emotions in distance learning systems is of great importance, especially in the adaptive capacity of automated education systems towards the student, but also in a corrective role in the distance learning process itself. Here we present a model for evaluating students based on automatic recognition of emotions during task solving.

Źródło:

The New Educational Review; 2017, 47; 225-240
1732-6729

Pojawia się w:

The New Educational Review

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 28.

Tytuł:

Mathematical Foundations of Cognitive Radios

Autorzy:

Couillet, R.
Debbah, M.

Powiązania:

https://bibliotekanauki.pl/articles/308175.pdf

Data publikacji:

2009

Wydawca:

Instytut Łączności - Państwowy Instytut Badawczy

Tematy:

Bayesian inference
cognitive radio
maximum entropy

Opis:

Recently, much interest has been directed towards software defined radios and embedded intelligence in telecommunication devices. However, no fundamental basis for cognitive radios has ever been proposed. In this paper, we introduce a fundamental vision of cognitive radios from a physical layer viewpoint. Specifically, our motivation in this work is to embed human-like intelligence in mobile wireless devices, following the three century-old work on Bayesian probability theory, the maximum entropy principle and minimal probability update. This allows us to partially answer such questions as, what are the signal detection capabilities of a wireless device, when facing a situation in which most parameters are missing, how to react and so on. As an introductory example, we will present previous works from the same authors following the cognitive framework, and especially the multi-antenna channel modeling and signal sensing.

Źródło:

Journal of Telecommunications and Information Technology; 2009, 4; 108-117
1509-4553
1899-8852

Pojawia się w:

Journal of Telecommunications and Information Technology

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 29.

Tytuł:

On the Consistency of Multithreshold Entropy Linear Classifier

Autorzy:

Czarnecki, Wojciech Marian

Powiązania:

https://bibliotekanauki.pl/articles/1373701.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego

Tematy:

multithreshold classifier
entropy
consistency
classification theory

Opis:

Multithreshold Entropy Linear Classifier (MELC) is a recent classifier idea which employs information theoretic concept in order to create a multithreshold maximum margin model. In this paper we analyze its consistency over multithreshold linear models and show that its objective function upper bounds the amount of misclassified points in a similar manner like hinge loss does in support vector machines. For further confirmation we also conduct some numerical experiments on five datasets.

Źródło:

Schedae Informaticae; 2015, 24; 123-132
0860-0295
2083-8476

Pojawia się w:

Schedae Informaticae

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 30.

Tytuł:

Co pojęcie entropii wniosło do filozofii?
What did the notion of entropy introduce into philosophy?

Autorzy:

Janusz, Robert

Powiązania:

https://bibliotekanauki.pl/articles/691136.pdf

Data publikacji:

2009

Wydawca:

Copernicus Center Press

Tematy:

energy
entropy
natural theology
Oswald's energetism

Opis:

In the article the emergence of notions: energy and entropy is studied. New physical discoveries were interesting for the domain of natural theology as well. The evolution of the notions in physics makes sometimes too simplistic expectations for philosophy of scientists. As an example Ostwald's energetism is given, where even ethics had its energetic imperative. On the other hand Fourier's type of philosophical elements in science is shown where fundamental role of mathematics is presupposed.

Źródło:

Zagadnienia Filozoficzne w Nauce; 2009, 45; 27-44
0867-8286
2451-0602

Pojawia się w:

Zagadnienia Filozoficzne w Nauce

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 31.

Tytuł:

Informacja w działalności gospodarczej
Information in business

Autorzy:

Mietlewski, Zygmunt
Mioduszewski, Jarosław

Powiązania:

https://bibliotekanauki.pl/articles/2167949.pdf

Data publikacji:

2018-12-15

Wydawca:

Ostrołęckie Towarzystwo Naukowe

Tematy:

information
entropy
refund
informacja
entropia
redundancja

Opis:

There is no need to stress the importance of information in today’s business. It is one of the key factors of success and the basic glue of any company, it creates culture and determines behaviours within it. It is a stimulus and an essence of decision processes that define aim of the company’s existence. It would be impossible to make any decision or to achieve goals set by the entrepreneurs (managers) without relevant information. Studying literature on the information theory brings up a question whether the term ‘information’, which undoubtedly is an essential part of our lives, with its practical use in business, means the same as in the information theory.
Znaczenia informacji w prowadzeniu działalności gospodarczej nie potrzeba dziś uzasadniać. Jest jednym z kluczowych czynników sukcesu i podstawowym spoiwem organizacji, tworzy jej kulturę i określa sposoby postępowania. Jest bodźcem i tworzywem procesów decyzyjnych, określających kierunek działania przedsiębiorstwa. Bez informacji nie byłoby możliwe podejmowanie decyzji i realizowanie przez przedsiębiorców (menedżerów) celów przedsiębiorstwa. Studiując obfitą literaturę z zakresu teorii informacji, można zastanawiać się, czy termin informacja używany w praktyce w działalności gospodarczej znaczy to samo, co stosowany w teorii informacji.

Źródło:

Zeszyty Naukowe Ostrołęckiego Towarzystwa Naukowego; 2018, Zeszyt, XXXII; 415-424
0860-9608

Pojawia się w:

Zeszyty Naukowe Ostrołęckiego Towarzystwa Naukowego

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 32.

Tytuł:

Wave Absorption Property of High Entropy Alloy Fabricated by Sol-Gel Process

Autorzy:

Yang, Suwon
Kim, Jeong-Gon
Jeong, Kwang-Pil
Choi, Jin-Hyuk

Powiązania:

https://bibliotekanauki.pl/articles/352432.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

high entropy alloy
wave absorption property

Opis:

In this study, the magnetic properties and wave absorption characteristics of high entropy alloys are investigated. The high entropy alloys with FeNiMnCoCu, FeNiMnZnCo, and FeNiZnCoCu compositions were synthesized by the sol-gel method. After the sol-gel process, the annealing process and hydrogen reduction process was performed. FeNiMnCoCu and FeNiZnCoCu were revealed soft magnetic property. The saturation magnetization was 12 emu/g and 36 emu/g, respectively. And The coercive force was –45 Oe and –34 Oe, respectively. The high entropy alloy with these compositions was revealed wave absorption property at above 10 gigahertz frequency region. And it has shown the trend that wave absorption frequency has decreased with the sample thickness increasing.

Źródło:

Archives of Metallurgy and Materials; 2020, 65, 4; 1277-1280
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 33.

Tytuł:

The Beta Pareto Distribution

Autorzy:

Hurairah, Ahmed

Powiązania:

https://bibliotekanauki.pl/articles/465778.pdf

Data publikacji:

2011

Wydawca:

Główny Urząd Statystyczny

Tematy:

Beta Pareto distribution
Kurtosis
Rényi entropy

Opis:

In this paper, we introduce a generalization—referred to as the beta Pareto distribution, generated from the logit of a beta random variable. We provide a comprehensive treatment of the mathematical properties of the beta Pareto distribution. We derive expressions for the kth moments of the distribution, variance, skewness, kurtosis, mean deviation about the mean, mean deviation about the median, Rényi entropy, Shannon entropy. We also discuss simulation issues, estimation of parameters by the methods of moments and maximum likelihood.

Źródło:

Statistics in Transition new series; 2011, 12, 1; 97-114
1234-7655

Pojawia się w:

Statistics in Transition new series

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 34.

Tytuł:

The Poet of Decay and Psychic Entropy: The Intersection of Surrealism and Science in J. G. Ballard’s Fiction

Autorzy:

Tereszewski, Marcin

Powiązania:

https://bibliotekanauki.pl/articles/2013227.pdf

Data publikacji:

2021

Wydawca:

Komisja Nauk Filologicznych Polskiej Akademii Nauk, Oddział we Wrocławiu

Tematy:

J
G
Ballard
surrealism
entropy
decay

Opis:

Images of decay, both psychological and physical, permeate much of J.G. Ballard’s fiction, creating in effect a unique aesthetic that has acquired the eponymous description “ballardian.” This imagery, stemming from the surrealist tradition, is more than aesthetic affectation; it is, as this article argues, the manifestation of an eschatological theme underlying much of New Wave science fiction. This article also addresses how scientific discourse, especially references to entropy, and surrealist aesthetics intersect in his novels (High-Rise and The Drowned World) to provide a metaphor for Ballard’s frequent use of decay imagery. Though the surrealist component of his imagination has been well documented, what still invites closer scrutiny are the ideological assumptions linking Ballard’s incorporation of surrealism with the work of other surrealists and the way Ballard develops this theme for his own purposes.

Źródło:

Academic Journal of Modern Philology; 2021, 14; 337-346
2299-7164
2353-3218

Pojawia się w:

Academic Journal of Modern Philology

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 35.

Tytuł:

A New Class of Fractional Cumulative Residual Entropy - Some Theoretical Results

Autorzy:

Benmahmoud, Slimane

Powiązania:

https://bibliotekanauki.pl/articles/2200956.pdf

Data publikacji:

2023

Wydawca:

Instytut Łączności - Państwowy Instytut Badawczy

Tematy:

cumulative residual entropy (CRE)
entropy’s generating function
fractional calculus
information measure
Riemann-Liouville/Caputo fractional integral
Riemann-Liouville/Caputo fractional derivative
Tsallis/Rényi entropy

Opis:

In this paper, by differentiating the entropy’s generating function (i.e., h(t) = R SX̄F tX (x)dx) using a Caputo fractional-order derivative, we derive a generalized non-logarithmic fractional cumulative residual entropy (FCRE). When the order of differentiation α → 1, the ordinary Rao CRE is recovered, which corresponds to the results from first-order ordinary differentiation. Some properties and examples of the proposed FCRE are also presented.

Źródło:

Journal of Telecommunications and Information Technology; 2023, 1; 25--29
1509-4553
1899-8852

Pojawia się w:

Journal of Telecommunications and Information Technology

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 36.

Tytuł:

Cross-Entropy Based Image Thresholding

Autorzy:

Malik, Mateusz
Spurek, Przemysław
Tabor, Jacek

Powiązania:

https://bibliotekanauki.pl/articles/1373691.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego

Tematy:

Cross-Entropy Clustering
thresholding
binarization
Otsu

Opis:

This paper presents a novel global thresholding algorithm for the binarization of documents and gray-scale images using Cross-Entropy Clustering. In the first step, a gray-level histogram is constructed, and the Gaussian densities are fitted. The thresholds are then determined as the cross-points of the Gaussian densities. This approach automatically detects the number of components (the upper limit of Gaussian densities is required).

Źródło:

Schedae Informaticae; 2015, 24; 21-29
0860-0295
2083-8476

Pojawia się w:

Schedae Informaticae

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 37.

Tytuł:

Entropy Coder for Audio Signals

Autorzy:

Ulacha, G.
Stasinski, R.

Powiązania:

https://bibliotekanauki.pl/articles/226974.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

lossless audio coding
entropy coding
OLS

Opis:

In the paper an effective entropy coder designed for coding of prediction errors of audio signals is presented. The coder is implemented inside a greater structure, which signal modeling part is a lossless coding backward adaptation algorithm consisting of cascaded Ordinary Least Squares (OLS), three Normalized Least Mean Square (NLMS), and prediction error bias correction sections. The technique performance is compared to that of four other lossless codecs, including MPEG-4 Audio Lossless (ALS) one, and it is shown that indeed, on the average the new method is the best. The entropy coder is an advanced context adaptive Golomb one followed by two context adaptive arithmetic coders.

Źródło:

International Journal of Electronics and Telecommunications; 2015, 61, 2; 219-224
2300-1933

Pojawia się w:

International Journal of Electronics and Telecommunications

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 38.

Tytuł:

Entropia w teorii wartości
Entropy in the Theory of Value

Autorzy:

Fałda, Beata

Powiązania:

https://bibliotekanauki.pl/articles/1835340.pdf

Data publikacji:

2020-05-12

Wydawca:

Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL

Tematy:

entropia
wartość ekonomiczna
entropy
economic value

Opis:

Teoria informacji stanowi bogate źródło metod i narzędzi wykorzystywanych w różnych dziedzinach wiedzy. Przedstawione w niniejszym artykule przykłady zastosowania funkcji entropii w teorii wartości stanowią próbę wzbogacenia arsenału badawczego ekonomii o nowe narzędzia.

Źródło:

Roczniki Nauk Społecznych; 2007, 35, 3; 119-131
0137-4176

Pojawia się w:

Roczniki Nauk Społecznych

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 39.

Tytuł:

Reymonts The Vampire: the beginning of infernal doom

Autorzy:

Adamczyk, Anna

Powiązania:

https://bibliotekanauki.pl/articles/628299.pdf

Data publikacji:

2010

Wydawca:

Fundacja Pro Scientia Publica

Tematy:

labyrinth, entropy, reversed colonialism, suburbia/ transurbia

Opis:

In The Vampire Reymont presents London as the imperial city falling into decline, where Polish immigrants, who lack identity, wander timelessly. It is also a place where a mercantile society is immersed in a reality dominated by technological development. Reymont's novel allows us to analyse the space of London at the end of the 19th century, and the human fate which is determined by this space. In my paper I would like to focus on the analysis of the city space,including the division into centre and suburbs of London, and losing the way in a maze (a maze of streets and a maze of subconsciousness of the main characters), the consequences of abandoning sacrum, entropy, and the crisis of family and art. The interesting vision of London created by Reymont gives us answers to a few important questions. Do the Polish immigrants find themselves in a new reality? How does the experience of a modern city affect people's lives? Why cannot contemporary man find his place in the surrounding world?

Źródło:

Journal of Education Culture and Society; 2010, 1, 1; 110-121
2081-1640

Pojawia się w:

Journal of Education Culture and Society

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 40.

Tytuł:

A role of the heat and work uncompensated transformations in the balance of entropy and the turbomachinery efficienc

Autorzy:

Kowalczyk, T.
Ziółkowski, P.
Sławiński, D.
Cisak, M.
Badur, J.

Powiązania:

https://bibliotekanauki.pl/articles/175450.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

entropy balance
entropy sources
uncompensated transformations
isentropic efficiency
polytropic efficiency
eulerian fluid
turbine stage
Puzyrewski number

Opis:

The notion of heat uncompensated transformation has early been introduced by Clausius in 1854 and next, after fifty years of forgetting, in 1904 Duhem has revalorized it and combined it with a new notion of work uncompensated transformation [3]. In this way the so-called ClausiusDuhem inequality has been established. In our paper we wish to present a novelized procedure of estimating the role of the uncompensated transformations of heat and work within the flow of viscous and heat conducting working fluid like water stream. The original procedure was introduced by Puzyrewski and it is essential in expressing of a local, in time and space, balance of entropy. Futhermore, this unique approach leads to redefinition of the efficiency notion, as is usually applied to fluid-flow machineries, to a new one important in computational fluid dynamics (CFD) three-dimensional modeling. As a result, it is shown that usage of the polytropic efficiency, instead of the isentropic efficiency, is more convenient and seems to be natural in CFD approach. Helpfully, we have also found a correlation between those two efficiency definitions with usage of proposed new dimensionless (criterion) number.

Źródło:

Transactions of the Institute of Fluid-Flow Machinery; 2017, 135; 11-27
0079-3205

Pojawia się w:

Transactions of the Institute of Fluid-Flow Machinery

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 41.

Tytuł:

Analiza wpływu wybranych czynników na entropię wieloskalową rytmu pracy serca w populacji badanych pochodzącej z laboratorium snu
Multiscale entropy analysis of the influence of selected factors on heart rate time series in sleep laboratory based cohort

Autorzy:

Radliński, J.
Baran, Z.
Tomalak, W.

Powiązania:

https://bibliotekanauki.pl/articles/154845.pdf

Data publikacji:

2012

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

entropia
entropia wieloskalowa
rytm pracy serca
EKG
zaburzenia oddychania
entropy
multiscale entropy
heart rate
ECG
respiratory disorders

Opis:

Celem pracy jest wstępna analiza wpływu czynników: fizjologicznego - wieku oraz chorobowych - zaburzeń oddychania, na entropię wieloskalową (Multiscale Entropy) rytmu pracy serca. W pracy dokonano analizy wpływu wieku na dwóch szerokich grupach badanych: osobach zdrowych (wiek od 1,5 do 63 lat) oraz grupie w wąskim przedziale wiekowym (40-50 lat) o różnym zakresie występowania zaburzeń oddychania w czasie snu (wskaźnik liczby zaburzeń oddychania RDI - Respiratory Disturbance Index 0,5 - 111 1/h). Wykazano wpływ wieku na wartość entropii (zmniejszanie), szczególnie w grupie osób dorosłych, oraz wpływ zaburzeń oddychania i zjawisk im towarzyszących (wybudzenia).
High costs and complication of standard polysomnography (PSG) lead to attempts to develop cheaper and less complicated methods. The analysis of heart rate complexity using non-linear dynamics methods seems to be promising, however the dynamics of heart rate is biased by several physiological factors. The aim of that study was to check the influence of a physiological factor - age and of respiratory disorders during sleep on heart rate variability analysed by multiscale entropy (MSE). The two groups were selected from archived measurements from the Sleep Laboratory of Institute for TBC and Lung Diseases Rabka Branch: a healthy group and a group of semi-constant age but without limitations to those disorders (Table 1). In both groups the full night diagnostics PSG according to the American Academy of Sleep Medicine (AASM) rules was performed. The R-R intervals were detected in the recorded ECG signal (250Hz), and the multiscale entropy (Goldberg's MSE) was calculated. We found high correlation between the entropy and age (Figs. 1, 2, 3) in adults, however in the children group (age<15) there was no such relation. Similar results were found in analysis of the influence of respiratory disorders on the RR time series entropy (Figs. 4, 5, 6, 7). The results lead to a conclusion that heart rate complexity described with use of the MSE analysis is strongly biased by age. MSE could also detect changes in RR time series associated with respiratory disorders during sleep. The further investigations should be performed to

Źródło:

Pomiary Automatyka Kontrola; 2012, R. 58, nr 4, 4; 365-368
0032-4140

Pojawia się w:

Pomiary Automatyka Kontrola

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 42.

Tytuł:

Rekonfigurowalność systemów w kontekście statystyki nie-ekstensywnej
Systems reconfiguration via non-extensive statistics approach

Autorzy:

Grabowski, F.
Strzałka, D.

Powiązania:

https://bibliotekanauki.pl/articles/156264.pdf

Data publikacji:

2008

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

rekonfigurowalność
entropia nieekstensywna
reconfiguration
non-extensive entropy

Opis:

W artykule pokazano, że czas życia systemów rekonfigurowalnych wpisuje się w przypadek super-ekstensywny, nieaddytywnej termodynamiki nierównowagowej i entropii Tsallisa, która oprócz składnika addytywnego o charakterze ilościowym, opisującym nierekonfigurowane struktury klasyczne, zawiera dodatkowy człon jakościowy wpisujący się w charakter struktur rekonfigurowalnych. Podejście to stanowi rozszerzenie klasycznej, addytywnej formuły entropii Boltzmanna-Gibbsa-Shannona. Badania dotyczą relacji pomiędzy postępem technologicznym określonym przez prawo Moore'a a czasem życia produktu w odniesieniu do struktur klasycznych i rekonfigurowalnych.
The article shows that the time of living of reconfigurable systems can be described by non-extensive, non-additive, non-equilibrium thermodynamics and Tsallis entropy, which beside the additive linear component that describes classical non-reconfigurable structures , has got additional term that can characterize the reconfigurable structures. The presented approach is the enhancement of classical additive formula of Boltzman-Gibbs-Shannon entropy. The relation between technological progress described by Moore's law and product time of living for classical and reconfigurable structures was shown.

Źródło:

Pomiary Automatyka Kontrola; 2008, R. 54, nr 8, 8; 556-558
0032-4140

Pojawia się w:

Pomiary Automatyka Kontrola

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 43.

Tytuł:

The maximum entropy method in the analysis of the Mössbauer spectra

Autorzy:

Dobrzyński, L.
Szymański, K.
Satuła, D.

Powiązania:

https://bibliotekanauki.pl/articles/147136.pdf

Data publikacji:

2004

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

Bayesian logic
maximum entropy method
Mössbauer spectra

Opis:

The paper shows the possibility of reconstruction of the distribution of hyperfine field parameters without prior assumptions concerning correlations between parameters. The method used is the maximum entropy method and the distributions considered concern the magnetic field and isomer shift. The results obtained are very encouraging and show the feasibility of the proposed method.

Źródło:

Nukleonika; 2004, 49,suppl.3; 89-93
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 44.

Tytuł:

Impact of green total factor productivity in marine economy based on entropy method

Autorzy:

Wu, D.

Powiązania:

https://bibliotekanauki.pl/articles/258584.pdf

Data publikacji:

2018

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

marine economy
green production efficiency
entropy method

Opis:

In order to improve the efficiency of marine economic production and realize the sustainable and healthy development of marine economy, the spatial-temporal and dynamic evolution trend of marine economic green production efficiency in coastal areas of China is analysed by means of SFA basic model, coefficient of variation, coefficient of Gini and entropy method. It mainly includes three aspects: the result analysis of marine economy green production efficiency; the dynamic trend analysis of marine economy green production efficiency; the analysis of factors affecting marine economy green production efficiency. The results show that the factors affecting the total factor productivity of the marine economy are: development level of marine economy, marine material capital, level of opening to the outside world, marine industrial structure, marine human capital and marine environmental governance.

Źródło:

Polish Maritime Research; 2018, S 3; 141-146
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 45.

Tytuł:

Characterization of weak type by the entropy distribution of r-nuclear operators

Autorzy:

Defant, Martin
Junge, Marius

Powiązania:

https://bibliotekanauki.pl/articles/1292529.pdf

Data publikacji:

1993

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

entropy numbers
r-nuclear operators
weak type

Opis:

The dual of a Banach space X is of weak type p if and only if the entropy numbers of an r-nuclear operator with values in a Banach space of weak type q belong to the Lorentz sequence space $ℓ_{s,r}$ with 1/s + 1/p + 1/q = 1 + 1/r (0 < r < 1, 1 ≤ p, q ≤ 2). It is enough to test this for Y = X*. This extends results of Carl, König and Kühn.

Źródło:

Studia Mathematica; 1993, 107, 1; 1-14
0039-3223

Pojawia się w:

Studia Mathematica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 46.

Tytuł:

A theoretical framework for determining the appropriate level of subsidy in an economy

Autorzy:

Osagiede, A. A.
Ekhosuehi, V. U.

Powiązania:

https://bibliotekanauki.pl/articles/406643.pdf

Data publikacji:

2015

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

entropy
Markov process
per capita income
subsidy

Opis:

A framework has been developed for determining the subsidy that, in the long run, serves to equalize the per capita income shares across income classes. The framework characterizes the income dynamics by the Markov process and uses the principle of maximum entropy for selecting among alternative subsidy schemes. The study provides a means to forecast the per capita income shares at any instant of time and serves as an objective tool to decide on the appropriate level of subsidy.

Źródło:

Operations Research and Decisions; 2015, 25, 2; 19-35
2081-8858
2391-6060

Pojawia się w:

Operations Research and Decisions

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 47.

Tytuł:

Measurement of entropy in the assessment of homogeneity of areas valued with the Szczecin Algorithm of Real Estate Mass Appraisal

Autorzy:

Gnat, Sebastian

Powiązania:

https://bibliotekanauki.pl/articles/522272.pdf

Data publikacji:

2019

Wydawca:

Uniwersytet Ekonomiczny w Katowicach

Tematy:

Entropy
Property market analysis
Property mass valuation

Opis:

Aim/purpose–General real estate taxation is a process regulated, inter alia, by the Real Estate Management Act. It is intended to establish a tax base for real estate in the event of a change in real estate tax base. General taxation is one of several applications of mass valuation of real estate, which enables valuation of many properties at the same time and with a uniform approach. One of the methods of mass valuation of real estate already applied in practice is the Szczecin Algorithm of Real Estate of Mass Appraisal (SAREMA). One of the immanent features of general taxation and the algorithm itself is the division of a selected area into possibly homogeneous areas called taxing zones with-in the general taxation terminology and, more broadly, elementary areas, according to the nomenclature used in the SAREMA. The paper presents the results of the studies on the measurement of elementary areas homogeneity on the example of land plots located in Szczecin. It is important to assess whether the designated sub-areas ofvaluation cover properties similar to each other in terms of their specific characteristics. If so, it will help to obtain more accurate mass valuation results.Design/methodology/approach–The paper proposes to use a modified entropy measure to establish whether the designated areas are homogeneous in terms of the specified properties of real estate. The database of real estate includes more than 1.5 thousand urbanised land plots located in Szczecin. The measurement of entropy will be preceded by the specification of elementary areas. The available methods include the application of an expert approach, under which land boundaries will be indicated by property valuers. Findings –The main conclusion of the study is that a modified measure of entropy en-sures a better indication of the degree of indefiniteness of valued sub-areas and thus it offers a better way of supporting the delimitation of these sub-areas in comparison to the classical measure of entropy.Research implications/limitations–The delimitation of valuation sub-areas constitutes an important element of mass valuation. Proper execution of this process enables obtain-ing much more precise valuations. An objective measure of homogeneity gives a chance to compare different approaches to the creation of the above-mentioned sub-areas and to choose the best of them.Originality/value/contribution–The main achievement of the study is a proposal to modify the classical entropy measure, thanks to which it better reflects the specificity of the assessment of homogeneity of the areas valued in terms of property market analysis.

Źródło:

Journal of Economics and Management; 2019, 38; 89-106
1732-1948

Pojawia się w:

Journal of Economics and Management

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 48.

Tytuł:

Auxetics as entropy filters - possible application

Autorzy:

Wojciechowski, K. W.
Kempinski, W.

Powiązania:

https://bibliotekanauki.pl/articles/1938609.pdf

Data publikacji:

2016

Wydawca:

Politechnika Gdańska

Tematy:

superfluidity
entropy filters
auxetics
3He isotope

Opis:

In this note a sketch of the idea of applying auxetics to separation of 3He from a mixture of 4He and 3He by using auxetic entropy filters is presented.

Źródło:

TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2016, 20, 3; 271-272
1428-6394

Pojawia się w:

TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 49.

Tytuł:

Informational entropy in simulation of one-dimensional random fields

Autorzy:

Opoka, Sz.
Walukiewicz, H.

Powiązania:

https://bibliotekanauki.pl/articles/1986966.pdf

Data publikacji:

2002

Wydawca:

Politechnika Gdańska

Tematy:

random fields
information entropy
beam structure
discretization

Opis:

The entropy H of a continuous distribution with probability density function f* is defined as a function of the number of nodes (n) in a one-dimensional scalar random field. For the second order theory this entropy is expressed by the determinants of the covariance matrices and simulated for several types of correlation functions. In the numerical example the propagation of the entropy for the static response of linear elastic, randomly loaded beam has been considered. Two unexpected results have been observed: - function H(n) is entirely different for differentiable (m.s.) and non-differentiable fields, with the same parameters in the correlation functions, - in some cases, the greater randomness at the input (measured by the entropy) does not lead to the greater randomness at the output.

Źródło:

TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2002, 6, 3; 379-385
1428-6394

Pojawia się w:

TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 50.

Tytuł:

Cross Entropy Clustering Approach to Iris Segmentation for Biometrics Purpose

Autorzy:

Misztal, Krzysztof
Saeed, Emil
Saeed, Khalid
Spurek, Przemysław
Tabor, Jacek

Powiązania:

https://bibliotekanauki.pl/articles/1373709.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego

Tematy:

CEC
cross entropy clustering
iris recognition
biometrics

Opis:

This work presents the step by step tutorial for how to use cross entropy clustering for the iris segmentation. We present the detailed construction of a suitable Gaussian model which best fits for in the case of iris images, and this is the novelty of the proposal approach. The obtained results are promising, both pupil and iris are extracted properly and all the information necessary for human identification and verification can be extracted from the found parts of the iris.

Źródło:

Schedae Informaticae; 2015, 24; 31-40
0860-0295
2083-8476

Pojawia się w:

Schedae Informaticae

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 51.

Tytuł:

Entropy of Pleistocene till composition as an indicator of sedimentation conditions in Southern Lithuania

Autorzy:

Baltrūnas, V.
Gaigalas, A.

Powiązania:

https://bibliotekanauki.pl/articles/2058783.pdf

Data publikacji:

2004

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

Southern Lithuania
Pleistocene till
relative entropy
sedimentology

Opis:

The two most complete and stratigraphically most reliably identified Pleistocene sections in Southern Lithuania were chosen as the object of this study. Variations in relative entropy were assessed from the average data on the grain size,mineral and petrographic composition of the individual stratigraphically identified till beds. Data obtained in the current study showed that the relative entropy of till composition, which characterises the even distribution of the components according to relative parameters (such as the fraction intervals and, the number of minerals), indicates that the till composition was modified by matter dispersion (mixing) and condensation (concentration). The relative entropy of the content of different till components (grain size fractions, heavy and light minerals, petrographic groups) in glacial units of various ages is different and indicates different parameters of glacial dynamics and different routes of glacier movement. Also, the relative entropy of till composition in the direction of glacier movement shows repetitive patterns, which are predetermined by loading of the bottom layers of the glacier with till material up to its maximum concentration, followed by their settling. Ice loading with till material proceeds by grinding and mixing the transit and indigenous exarational material until the till mixture reaches its maximum density (volumetric weight) and becomes close to the optimum mixture.

Źródło:

Geological Quarterly; 2004, 48, 2; 115--122
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 52.

Tytuł:

On a thermodynamic model of fluid-saturated porous medium

Autorzy:

Kosiński, W.
Kubik, J.
Cieszko, M.
Kaczmarek, M.

Powiązania:

https://bibliotekanauki.pl/articles/280580.pdf

Data publikacji:

2001

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

fluid-saturated porous solid
entropy
heat flux

Opis:

In order to describe isotropic pore structure of a solid skeleton satureted with a fluid, two internal state variables are introduced: a volume porosity... and a structural parameter... . The internal friction in the skeleton material is incorporated by a tensor-valued internal state variable... . Thermal properties are described by a single antropy density function... and two thermal state variables... and... . In the energy balance law, both heat fluxes appear and an added mass effect is incorporated to manifest the influence of the pore structure of the skeleton on the fluid motion. Consequences of the second law of thermodynamics are formulated in the form of four potential relations for stresses and heat flux vectors together with a representation of interaction forces.
Termodynamiczny model ośrodka porowatego nasyconego cieczą. Zaproponowano prosty model termodynamicznego ośrodka porowatego nasyconego cieczą. Dla opisu izotropowej struktury porów stałego szkieletu nasyconego cieczą zostały wprowadzone dwie skalarne zmienne stanu: objętościowa porowatość... i parametr strukturalny... .Lepkość wewnętrzna materiału szkieletu została uwzględniona poprzez tensorową zmienną stanu... .Własności termiczne zostały opisane przez pojedyńczą funkcję gęstości entropii... i dwie termiczne zmienne stanu ... i ... . W prawie bilansu energii występują oba strumienie ciepła, zaś uwzględnienie efektu masy dołączonej odzwierciedla wpływstruktury porów na ruch cieczy. Sformułowano konsekwencje drugiego prawa termodynamiki w postaci 4 związków potencjalnych dla naprężeń i wektorów strumienia ciepła wraz z reprezentacją sił oddziaływania.

Źródło:

Journal of Theoretical and Applied Mechanics; 2001, 39, 1; 3-12
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 53.

Tytuł:

Wavelet-based Entropy Measure for Rate-Distortion Optimization in Image Coding

Autorzy:

Garcia-Alvarez, J.
Führ, H.
Castellanos-Dominguez, G.

Powiązania:

https://bibliotekanauki.pl/articles/226142.pdf

Data publikacji:

2010

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

entropy
wavelet transform
information measure
rate distortion

Opis:

A novel method for calculation of the entropy measure in wavelet space is proposed. This perceived-based entropy measure uses a Second Order Model entropy estimator, in which the occurrence of neighbors is considered in formulation. It has the intention to allow the implementation of a more suitable measure in coding processes and a relationship between the metric and the description of perceptual features. This method is used for the Rate-Distortion optimization in order to improve the bit-allocation coding algorithm, demonstrating that the wavelet-based entropy estimates a truncation step close to the target rate. The hypothesis is founded in the effect of distortion on the coefficient allocation. Because entropy measure is a close approximation of the conditional probability of image in multiresolution space, it provides an adequate representation for the information of a Detail feature. A definition of Detail-based homogeneity variance criteria is used for the information quantity - wavelet representation space, in order to find the image that fits a given Quality Level criteria. Experimental results are obtained for artificial and natural databases.

Źródło:

International Journal of Electronics and Telecommunications; 2010, 56, 1; 25-31
2300-1933

Pojawia się w:

International Journal of Electronics and Telecommunications

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 54.

Tytuł:

Języki specjalistyczne w świetle wybranych założeń emergentyzmu. Przyczynek do rozważań teoretycznych
Languages for Special Purposes and Selected Concepts of Emergence. Theoretical Considerations

Autorzy:

Bajerowska, Anna

Powiązania:

https://bibliotekanauki.pl/articles/555376.pdf

Data publikacji:

2018

Wydawca:

Uniwersytet Warszawski. Wydział Lingwistyki Stosowanej

Tematy:

anthropocentric linguistics
denotation
specificity
emergence
entropy
thermodynamics

Opis:

This paper is an extended Polish version of the article Emergenz, Spezifizitӓt und Entropie im Lichte der anthropozentrischen Linguistik, originally written in German and submitted for publication in the Germanica Wratislaviensia 144. First, a preliminary model of generating (specialized) knowledge will be proposed, which was built across anthropocentric linguistics, the concept of emergence and selected research in the field of neurobiology. The model is aimed at offering a possible solution to the problem of interdependence between human language skills and knowledge generating. Second, a redefinition of the terms specificity and entropy in the light of the anthropocentric theory of human languages will be outlined. It has to be highlighted that the present considerations are merely a theoretical draft which requires a more solid linguistic, philosophical and neurobiological foundation.

Źródło:

Applied Linguistics Papers; 2018, 25/4; 145-157
2544-9354

Pojawia się w:

Applied Linguistics Papers

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 55.

Tytuł:

Does time exist in quantum gravity?

Autorzy:

Kiefer, Claus

Powiązania:

https://bibliotekanauki.pl/articles/690788.pdf

Data publikacji:

2015

Wydawca:

Copernicus Center Press

Tematy:

cosmology
arrow of time
entropy
quantum gravity

Opis:

Time is absolute in standard quantum theory and dynamical in general relativity. The combination of both theories into a theory of quantum gravity leads therefore to a “problem of time”. In my essay, I investigate those consequences for the concept of time that may be drawn without a detailed knowledge of quantum gravity. The only assumptions are the experimentally supported universality of the linear structure of quantum theory and the recovery of general relativity in the classical limit. Among the consequences are the fundamental timelessness of quantum gravity, the approximate nature of a semiclassical time, and the correlation of entropy with the size of the Universe.

Źródło:

Zagadnienia Filozoficzne w Nauce; 2015, 59; 7-24
0867-8286
2451-0602

Pojawia się w:

Zagadnienia Filozoficzne w Nauce

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 56.

Tytuł:

Entropy production due to conjugate natural convection in a nanofluid-filled enclosure with a stepped wall

Autorzy:

Bouchoucha, Abd el
Oztop, Hakan F.
Bessaih, Rachid
Abu-Hamdeh, Nidal

Powiązania:

https://bibliotekanauki.pl/articles/38894787.pdf

Data publikacji:

2023

Wydawca:

Instytut Podstawowych Problemów Techniki PAN

Tematy:

entropy generation
natural convection
nanofluids
cavity
wall

Opis:

The main aim of this paper is to improve the heat transfer in a square cavity with a body at the left wall filled with a Al₂O₃/water nanofluid for different geometries. Numerous simulation experiments are conducted. A relative temperature is maintained at the vertical and top horizontal walls while the bottom wall is warm. The finite volume approach is considered to resolve the equations governing the thermal transfer flow in the physical domain based on the SIMPLER algorithm. In this study, different values of the following parameters are considered: Rayleigh number (10⁴ ≤ Ra ≤ 10⁵) and solid volume fraction (0 ≤ φ ≤ 0.1) of nanoparticles (NPs). Parameters, such as the Rayleigh (Ra) and Bejan (Be) numbers, thermal conductivity, body’s dimensions, and NPs volume fraction, which directly affect the entropy generation and heat transfer rate, are studied in a particular way. The obtained results show that entropy generation goes ahead with the Ra increase and inverse to the solid volume fraction increase. One can notice that the heat transfer has a proportional relation with φ and Ra.

Źródło:

Engineering Transactions; 2023, 71, 2; 161-183
0867-888X

Pojawia się w:

Engineering Transactions

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 57.

Tytuł:

Entropy generation and thermodynamic analysis of solar air heaters with artificial roughness on absorber plate

Autorzy:

Prasad, R. K.
Sahu, M. K.

Powiązania:

https://bibliotekanauki.pl/articles/240173.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

entropy generation analysis
entropy generation number
irreversibility
Bejan number
analiza generowania entropii
liczba generacyjna entropii
nieodwracalność
liczba Bejana

Opis:

This paper presents mathematical modelling and numerical analysis to evaluate entropy generation analysis (EGA) by considering pressure drop and second law efficiency based on thermodynamics for forced convection heat transfer in rectangular duct of a solar air heater with wire as artificial roughness in the form of arc shape geometry on the absorber plate. The investigation includes evaluations of entropy generation, entropy generation number, Bejan number and irreversibilities of roughened as well as smooth absorber plate solar air heaters to compare the relative performances. Furthermore, effects of various roughness parameters and operating parameters on entropy generation have also been investigated. Entropy generation and irreversibilities (exergy destroyed) has its minimum value at relative roughness height of 0.0422 and relative angle of attack of 0.33, which leads to the maximum exergetic efficiency. Entropy generation and exergy based analyses can be adopted for the evaluation of the overall performance of solar air heaters.

Źródło:

Archives of Thermodynamics; 2017, 38, 3; 23-48
1231-0956
2083-6023

Pojawia się w:

Archives of Thermodynamics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 58.

Tytuł:

Hybrid-optional effectiveness functions entropy conditional extremization doctrine contributions into engineering systems reliability assessments

Autorzy:

Goncharenko, Andriy Viktorovich

Powiązania:

https://bibliotekanauki.pl/articles/36404766.pdf

Data publikacji:

2019

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Lotnictwa

Tematy:

effectiveness functions entropy
hybrid-optional effectiveness
multi-optionality
optimal distribution
variational principle
probability
reliability
entropy maximum principle
optimal periodicity

Opis:

In this publication a Doctrine for the Conditional Extremization of the Hybrid-Optional Effectiveness Functions Entropy is discussed as a tool for the Reliability Assessments of Engineering Systems. Traditionally, most of the problems having been dealt with in this area relate with the probabilistic problem settings. Regularly, the optimal solutions are obtained through the probability extremizations. It is shown a possibility of the optimal solutions “derivation”, with the help of a model implementing a variational principle which takes into account objectively existing parameters and components of the Markovian process. The presence of an extremum of the objective state probability is observed and determined on the basis of the proposed Doctrine with taking into account the measure of uncertainty of the hybrid-optional effectiveness functions in the view of their entropy. Such approach resembles the well known Jaynes’ Entropy Maximum Principle from theoretical statistical physics adopted in subjective analysis of active systems as the subjective entropy maximum principle postulating the subjective entropy conditional optimization. The developed here with Doctrine implies objective characteristics of the process rather than subjective individual’s preferences or choices, as well as the states probabilities maximums are being found without solving a system of ordinary linear differential equations of the first order by Erlang corresponding to the graph of the process. Conducted numerical simulation for the proposed mathematical models is illustrated with the plotted diagrams.

Źródło:

Transactions on Aerospace Research; 2019, 2 (255); 96-106
0509-6669
2545-2835

Pojawia się w:

Transactions on Aerospace Research

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 59.

Tytuł:

The global influence of local symmetry on entropy of the Universe

Autorzy:

Majka, M.
Gajewski, M.
Hasan, M. K.
Majka, T. M.

Powiązania:

https://bibliotekanauki.pl/articles/134889.pdf

Data publikacji:

2016

Wydawca:

Tomasz Mariusz Majka

Tematy:

local symmetry
global symmetry
gravitational entropy
point symmetry

Opis:

Space and matter were created in the Big Bang. Since Big Bang, the Universe has been expanding continually by increasing its entropy. The fundamental forces broke their symmetries, making impossible to unify them together. Nevertheless, the symmetry of the Universe has not changed and interestingly will never. By analysing global and local symmetry, this paper will present a hypothesis on the future shape and energy expansion of the Universe. A new theory of point symmetry of the Universe will also be introduced.

Źródło:

Journal of Education and Technical Sciences; 2016, 3, 1; 5-7
2300-7419
2392-036X

Pojawia się w:

Journal of Education and Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 60.

Tytuł:

The kinetics of growth of high entropy alloy layers sputtered on Tungsten powder substrate

Autorzy:

Stefaniak, Agnieszka

Powiązania:

https://bibliotekanauki.pl/articles/1179528.pdf

Data publikacji:

2017

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

ICP analysis
high entropy alloy
magnetron sputtering
nanolayers

Opis:

Tungsten powder particles have been encapsulated with thin CrMnFeCoNi layers by magnetron sputtering method using high entropy alloy as a target. In the course of sputtering the powder surface has been periodically analyzed. The multimetallic coatings were being dissolved in 2 M HCl and the obtained solutions were analyzed by ICP method to determine Cr3+, Mn2+, Fe2+, Co2+ and Ni2+ ions concentration. The aim of the analysis was comparison of atomic proportions of the elements in the target and in obtained layer and indirect determining of the layer thickness.

Źródło:

World Scientific News; 2017, 76; 60-65
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 61.

Tytuł:

Metric entropy of convex hulls in Hilbert spaces

Autorzy:

Li, Wenbo V.
Linde, Werner

Powiązania:

https://bibliotekanauki.pl/articles/1206124.pdf

Data publikacji:

2000

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

metric entropy
convex hull
majorizing measure
Gaussian process

Opis:

Let T be a precompact subset of a Hilbert space. We estimate the metric entropy of co(T), the convex hull of T, by quantities originating in the theory of majorizing measures. In a similar way, estimates of the Gelfand width are provided. As an application we get upper bounds for the entropy of co(T), $T={t_1,t_2,...}$, $||t_j||≤a_j$, by functions of the $a_j$'s only. This partially answers a question raised by K. Ball and A. Pajor (cf. [1]). Our estimates turn out to be optimal in the case of slowly decreasing sequences $(a_j)_{j=1}^∞$.

Źródło:

Studia Mathematica; 2000, 139, 1; 29-45
0039-3223

Pojawia się w:

Studia Mathematica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 62.

Tytuł:

Mixing properties of nearly maximal entropy measures for $ℤ^{d}$ shifts of finite type

Autorzy:

Robinson, E.
Şahin, Ayşe

Powiązania:

https://bibliotekanauki.pl/articles/1396026.pdf

Data publikacji:

2000

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

entropy
ergodic theory
symbolic dynamics
$ℤ^{d$ actions

Opis:

We prove that for a certain class of $ℤ^d$ shifts of finite type with positive topological entropy there is always an invariant measure, with entropy arbitrarily close to the topological entropy, that has strong metric mixing properties. With the additional assumption that there are dense periodic orbits, one can ensure that this measure is Bernoulli.

Źródło:

Colloquium Mathematicum; 2000, 84/85, 1; 43-50
0010-1354

Pojawia się w:

Colloquium Mathematicum

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 63.

Tytuł:

Existence results for Dirichlet problems with degenerated p-Laplacian

Autorzy:

Cavalheiro, A. C

Powiązania:

https://bibliotekanauki.pl/articles/254803.pdf

Data publikacji:

2013

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

degenerate elliptic equations
entropy solutions
weighted Sobolev spaces

Opis:

In this article, we prove the existence of entropy solutions for the Dirichlet problem [formula] where Ω is a bounded open set of [formula].

Źródło:

Opuscula Mathematica; 2013, 33, 3; 439-453
1232-9274
2300-6919

Pojawia się w:

Opuscula Mathematica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 64.

Tytuł:

Stop criteria for retransmission termination in soft-combining algorithms

Autorzy:

Zepernick, H.-J.
Caldera, M.

Powiązania:

https://bibliotekanauki.pl/articles/309572.pdf

Data publikacji:

2001

Wydawca:

Instytut Łączności - Państwowy Instytut Badawczy

Tematy:

MAP decoder
soft-combining
retransmission termination
cross-entropy

Opis:

Soft-combining algorithms use retransmissions of the same codeword to improve the reliability of communication over very noisy channels. In this paper, soft-outputs from a maximum a posteriori (MAP) decoder are used as a priori information for decoding of retransmitted codewords. As all received words may not need the same number of retransmissions to achieve satisfactory reliability, a stop criterion to terminate retransmissions needs to be identified. As a first and very simple stop criterion, we propose an algorithm which uses the sign of the soft-output at the MAP decoder. The performance obtained with this stop criterion is compared with the one assuming a genius observer, which identifies otherwise undetectable errors. Since this technique needs always a particular number of initial retransmissions, we exploit cross-entropy between subsequent retransmissions as a more advanced but still simple stop criterion. Simulation results show that significant performance improvement can be gained with soft-combining techniques compared to simple hard or soft decision decoding. It also shows that the examined stop criteria perform very close to the optimistic case of a genius observer.

Źródło:

Journal of Telecommunications and Information Technology; 2001, 3; 61-65
1509-4553
1899-8852

Pojawia się w:

Journal of Telecommunications and Information Technology

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 65.

Tytuł:

Investigation of lithofacies predictability using the Shannon (information) entropy theorem : the Upper Eocene “Górka Lubartowska” amber deposit of the Siemien Formation

Autorzy:

Czuryłowicz, Krzysztof

Powiązania:

https://bibliotekanauki.pl/articles/2185977.pdf

Data publikacji:

2022

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

Shannon entropy
uncertainty
facies probability
Multiple-Point Statistics

Opis:

A generalized workflow of scientific process requires data to be obtained, reprocessed, integrated, optionally transformed, modelled and finally interpreted in order to understand the underlying process. This procedure is affected by both objective and subjective uncertainties. In parallel with the development of geostatistics, the role of uncertainty has been widely investigated in geosciences. This has led to the introduction of new concepts, taken for example from thermodynamics, such as entropy. Predicting the subsurface is an especially thankless effort, as data are driven from spatially highly limited direct sources. The following paper provides an review of various applications of the Shannon entropy theorem in geoscience. Information entropy, initially proposed by Shannon (1948) provides an objective measure of overall system uncertainty. Significant concern has been focused on the application of Shannon entropy to provide an objective measure of joint system uncertainty and visualization of its spatial distribution. The area of extensively drilled Eocene amber-bearing deposits located in the Lubelskie voivodeship was selected as a case study to investigate the quality of prediction stochastic lithofacies models. The importance of adding secondary variables to a stochastic model is also reviewed here. Adding new data and rerunning the simulation allows assessment of its impact on the predictability of a stochastic model. The most important conclusion from the study is that the deposition of amber-bearing lithofacies occurred mostly in the northern part of the area investigated, as shown also by ongoing exploitation of the deposit.

Źródło:

Geological Quarterly; 2022, 66, 2; art. no. 16
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 66.

Tytuł:

Fabrication of Molybdenum Alloy with Distributed High-Entropy Alloy Via Pressureless Sintering

Autorzy:

Choi, Won June
Park, Cheon Woong
Byun, Jong Min
Kim, Young Do

Powiązania:

https://bibliotekanauki.pl/articles/353990.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

molybdenum alloy
high-entropy alloys
core-shell powder

Opis:

In this study, a molybdenum alloy with dispersed high-entropy particles was fabricated using the powder metallurgy method. The high-entropy powder, composed of Nb, Ta, V, W, and Zr elements with a same atomic fraction, was prepared via high-energy ball milling. Using this powder, an ideal core-shell powder, composed of high-entropy powder as core and Mo powder as shell, was synthesized via the milling and reduction processes. These processes enabled the realization of an ideal microstructure with the high-entropy phase uniformly dispersed in the Mo matrix. The sintered body was successfully fabricated via uniaxial compaction followed by pressureless sintering. The sintered body was analyzed by X-ray diffraction and scanning electron microscope, and the high-entropy phase is uniformly dispersed in the Mo matrix.

Źródło:

Archives of Metallurgy and Materials; 2020, 65, 4; 1269-1272
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 67.

Tytuł:

Wycena entropowa na rynku łączonym
Entropy price in the joined market model

Autorzy:

Utkin, Joanna

Powiązania:

https://bibliotekanauki.pl/articles/592541.pdf

Data publikacji:

2016

Wydawca:

Uniwersytet Ekonomiczny w Katowicach

Tematy:

Rynek łączony
Względna entropia
Joined market
Relative entropy

Opis:

Model rynku łączonego [Utkin, 2014a] jest niezupełny i pozbawiony możliwości arbitrażu. Występują w nim wypłaty nieosiągalne. O ile wypłata osiągalna ma jedną wartość wyceny bezarbitrażowej, to zbiór wartości wyceny bezarbitrażowej wypłaty nieosiągalnej jest przedziałem otwartym. Na początku przeanalizowano wypłaty na rynku łączonym pod względem osiągalności. Główny cel artykułu to wyznaczenie ceny entropowej dowolnej wypłaty na rynku łączonym. Po wyrażeniu względnej entropii, jako funkcji parametru rozkładu prawdopodobieństwa martyngałowego, otrzymano równanie parametru minimalizującego entropię, będące równaniem liniowym lub kwadratowym. Za pomocą optymalnego parametru wyznaczono rozkład prawdopodobieństwa martyngałowego, minimalizujący entropię, a następnie cenę entropową. Ponadto, na rynku łączonym rozważono warunkową minimalizację entropii i uzyskano związek mnożników Lagrange’a z portfelem maksymalizującym oczekiwaną wykładniczą użyteczność wypłaty. Stosując charakterystykę minimalnej entropii [Frittelli, 2000], wyznaczono optymalny portfel, rozwiązując pewien układ równań liniowych.
The joined market model [Utkin, 2014a] is an incomplete one and has no arbitrage opportunities. It contains the non-attainable payoffs. While the attainable payoff has one price, the set of prices of the non-attainable payoff is there an open interval. First, we analyse the attainability of the payoffs in the joined market. The main aim of this paper is to determine the entropy as a function of the variable and to find its minimum as a solution of one or two degree equation. Using this solution we determine the optimal martingale probability distribution and we formulate the entropy price. Moreover, in case of the joined market, we consider the conditional entropy minimization and we obtain the relations between the Lagrange multipliers and the portfolio maximizing expected exponential utility of the payoff. Applying the minimal entropy characterization of minimal entropy [Frittelli, 2000] we determine the optimal portfolio by solving a linear equations system.

Źródło:

Studia Ekonomiczne; 2016, 301; 228-240
2083-8611

Pojawia się w:

Studia Ekonomiczne

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 68.

Tytuł:

Entropia struktury obiektu w ujęciu addytywnym
Entropy of object structure in additive depiction

Autorzy:

Szczepański, P.

Powiązania:

https://bibliotekanauki.pl/articles/209499.pdf

Data publikacji:

2009

Wydawca:

Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego

Tematy:

diagnostyka
entropia
struktura
prawdopodobieństwo
diagnostics
entropy
structure
probability

Opis:

W niniejszej pracy wyrażono pogląd, że poznanie entropii obiektu powinno uwzględniać prawdopodobieństwa wszystkich jego rozróżnialnych stanów niezawodnościowych. Zauważono, że rozróżnialność ta zależy od struktury tego obiektu i dwóch niekwestionowanych pryncypiów diagnostyki technicznej. Pierwsze z nich głosi, że element jest niezdatny, jeśli wszystkie jego sygnały wejściowe są dopuszczalne, a sygnał wyjściowy - niedopuszczalny, a drugie, że - sygnał wyjściowy elementu jest niedopuszczalny, jeśli co najmniej jeden z jego sygnałów wejściowych jest także niedopuszczalny. Narzędziem wyznaczenia prawdopodobieństw stała się znana z teorii grafów binarna macierz osiągalności, a graficzną ilustracją struktury - graf Hertza.
In the paper, an idea is presented that in finding out the object's entropy, the probability of all its distinguishable reliable states should be taken into account. It was stated that this distinction depends both on the object structure and two undisputable principles of technical diagnostics. First of them says that an element is unsuitable if all its input signals are permissible and an output signal is not permissible. The second principle says that an output signal of an element is not permissible if at least one of its input signals is not also permissible. As a tool for determination of probabilities, a binary achievability matrix, known from graphs theory, has been chosen and for graphical illustration of a structure - the Hertz graph has been used.

Źródło:

Biuletyn Wojskowej Akademii Technicznej; 2009, 58, 3; 169-192
1234-5865

Pojawia się w:

Biuletyn Wojskowej Akademii Technicznej

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 69.

Tytuł:

Spatial weight matrix impact on real estate hierarchical clustering in the process of mass valuation

Autorzy:

Gnat, Sebastian

Powiązania:

https://bibliotekanauki.pl/articles/19090897.pdf

Data publikacji:

2019

Wydawca:

Instytut Badań Gospodarczych

Tematy:

agglomerative clustering
entropy
property mass appraisal
market analysis

Opis:

Research background: The value of the property can be determined on an individual or mass basis. There are a number of situations in which uniform and relatively fast results obtained by means of mass valuation undoubtedly outweigh the advantages of the individual approach. In literature and practice there are a number of different types of models of mass valuation of real estate. For some of them it is postulated or required to group the valued properties into homogeneous subset due to various criteria. One such model is Szczecin Algorithm of Real Estate Mass Appraisal (SAREMA). When using this algorithm, the area to be valued should be divided into the so-called location attractiveness areas (LAZ). Such division can be made in many ways. Regardless of the method of clustering, its result should be assessed, depending on the degree of implementation of the adopted criterion of division quality. A better division of real estate will translate into more accurate valuation results. Purpose of the article: The aim of the article is to present an application of hierarchical clustering with a spatial constraints algorithm for the creation of LAZ. This method requires the specification of spatial weight matrix to carry out the clustering process. Due to the fact that such a matrix can be specified in a number of ways, the impact of the proposed types of matrices on the clustering process will be described. A modified measure of information entropy will be used to assess the clustering results. Methods: The article utilises the algorithm of agglomerative clustering, which takes into account spatial constraints, which is particularly important in the context of real estate valuation. Homogeneity of clusters will be determined with the means of information entropy. Findings & Value added: The main achievements of the study will be to assess whether the type of the distance matrix has a significant impact on the clustering of properties under valuation.

Źródło:

Oeconomia Copernicana; 2019, 10, 1; 131-151
2083-1277

Pojawia się w:

Oeconomia Copernicana

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 70.

Tytuł:

Some preliminary results of memory cache analysis with the use of non-extensive

Autorzy:

Strzałka, D.

Powiązania:

https://bibliotekanauki.pl/articles/106168.pdf

Data publikacji:

2016

Wydawca:

Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej

Tematy:

complex systems
cache memory
system counters
sallis entropy

Opis:

The problem of modeling different parts of computer systems requires accurate statistical tools. Cache memory systems is an inherent part of nowadays computer systems, where the memory hierarchical structure plays a key point role in behavior and performance of the whole system. In the case of Windows operating systems, cache memory is a place in memory subsystem where the I/O system puts recently used data from disk. In paper some preliminary results about statistical behavior of one selected system counter behavior are presented. Obtained results shown that the real phenomena, which have appeared during human-computer interaction, can be expressed in terms of non-extensive statistics that is related to Tsallis proposal of new entropy definition.

Źródło:

Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica; 2016, 16, 2; 43-47
1732-1360
2083-3628

Pojawia się w:

Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 71.

Tytuł:

Towards the analysis of process fluctuation in wind turbine
Kierunki analizy fluktuacji procesów w silnikach wiatrowych

Autorzy:

Draganov, B.
Kozyrskyi, V.

Powiązania:

https://bibliotekanauki.pl/articles/56320.pdf

Data publikacji:

2013

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

process fluctuation
wind turbine
entropy
turbulent wind flow

Opis:

The basic laws of fluctuation and statistical physics propositions are presented. The analysis of turbulent wind flow characteristics is performed. An example of the correlation of wind speed horizontal and vertical components pulsation is presented. The dependence between the fluctuation laws and entropy is determined.
Kierunki analizy fluktuacji procesów w silnikach wiatrowych. Przedstawiono podstawowe prawa fluktuacji i twierdzenia fizyki statystycznej. Wykonano analizę właściwości tur-bulentnego przepływu wiatrowego. Przedstawiono przykład korelacji pulsacji poziomych i pionowych składowych prędkości wiatru. Określono zależność między prawem fluktuacji i entropii.

Źródło:

Annals of Warsaw University of Life Sciences - SGGW. Agriculture; 2013, 62 Agric.Forest Eng.
0208-5712

Pojawia się w:

Annals of Warsaw University of Life Sciences - SGGW. Agriculture

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 72.

Tytuł:

Optimization of groundwater quality monitoring network using information theory and simulated annealing algorithm

Autorzy:

Treichel, W.
Kucharek, M.

Powiązania:

https://bibliotekanauki.pl/articles/2063028.pdf

Data publikacji:

2010

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

simulated annealing
monitoring network
information theory
optimization
entropy

Opis:

In this paper a methodology of assessment and optimization of groundwater quality monitoring network which takes into account the evaluation criteria derived from the Shannon information theory is presented. The fundamental criteria derived from this theory are: (1) the value of marginal information entropy, which is a measure of the amount of information containing in the data in a location of sampling point, and (2) the value of transinformation (mutual information) which measures the amount of information shared between each of two sampling points. Transinformation can be interpreted as an index of the stochastic dependence between the random variables corresponding to groundwater quality data recorded in different sampling points of monitoring network and shows the reduction of uncertainty included in one variable due to the knowledge of the other variable. In the optimization problem the objective function involving the value of transinformation of the investigated water quality parameters (Cl, Cu, Na) is minimized. To minimize the objective function the simulated annealing algorithm, which allows to find a satisfactory sub-optimal solution, was used. The proposed methodology was applied to optimize the groundwater monitoring network of contaminant reservoir Żelazny Most, one of the worlds biggest industrial waste disposal site, which collects post-flotation contaminants originating from copper ore treatment. The results show an increase in the effectiveness of the monitoring network by reducing the number of sampling points while maintaining an acceptable amount of information available in the network.

Źródło:

Biuletyn Państwowego Instytutu Geologicznego; 2010, 441 Hydrogeologia z. 10; 193--199
0867-6143

Pojawia się w:

Biuletyn Państwowego Instytutu Geologicznego

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 73.

Tytuł:

Empirical assessment of efficiency of entropy source for random number generators using autocorrelation factor test

Autorzy:

Shreenabh, Moujesh Agrawal

Powiązania:

https://bibliotekanauki.pl/articles/1076114.pdf

Data publikacji:

2019

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Entropy
auto correlation factor test
cyber-security
randomness

Opis:

To achieve true randomness of numbers, the entropy source needs to be efficient. The statistical testing of efficiency of entropy source is necessary as it is used in random number generators for cryptography, simulation, statistical sampling, etc. 5000 numbers each were generated in four experimental entropy conditions: Control experiment with white light, Experimental conditions with multicoloured light with light path not disrupted, while light with path disrupted by thermocol balls, multicoloured light with path disrupted by thermocol balls. The numbers thus generated using each entropy condition were tested by Auto Correlation Factor Test to identify optimal experimental condition. The results were displayed in graphical and tabular format. The four graphs depicted the autocorrelations clearly showing that the best results were obtained for the fourth experimental condition ‘multicoloured light fan on’. It was found that Autocorrelation factor test is a powerful test for empirical assessment of efficiency of entropy source for random number generation. If the random number generator developed by any individual or organization is tested by Autocorrelation factor test, the efficiency of the entropy source can be pre-established thus preventing post hazards like hacking of random numbers. The security of data is a major concern in all areas such as defense, banking, research, designing and evaluation of examinations, etc.

Źródło:

World Scientific News; 2019, 117; 228-234
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 74.

Tytuł:

Dynamics on Hubbard trees

Autorzy:

Alsedà, Lluís
Fagella, Núria

Powiązania:

https://bibliotekanauki.pl/articles/1205063.pdf

Data publikacji:

2000

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

Hubbard trees
renormalization
Misiurewicz polynomials
transitivity
topological entropy

Opis:

It is well known that the Hubbard tree of a postcritically finite complex polynomial contains all the combinatorial information on the polynomial. In fact, an abstract Hubbard tree as defined in [23] uniquely determines the polynomial up to affine conjugation. In this paper we give necessary and sufficient conditions enabling one to deduce directly from the restriction of a quadratic Misiurewicz polynomial to its Hubbard tree whether the polynomial is renormalizable, and in this case, of which type. Moreover, we study dynamical features such as entropy, transitivity or periodic structure of the polynomial restricted to the Hubbard tree, and compare them with the properties of the polynomial on its Julia set. In other words, we want to study how much of the "dynamical information" about the polynomial is captured by the Hubbard tree.

Źródło:

Fundamenta Mathematicae; 2000, 164, 2; 115-141
0016-2736

Pojawia się w:

Fundamenta Mathematicae

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 75.

Tytuł:

Badanie klasyfikatora rozmytego z wykorzystaniem entropii rozmytej
Study of fuzzy classifier based on fuzzy entropy

Autorzy:

Sosnowski, Z. A.

Powiązania:

https://bibliotekanauki.pl/articles/404093.pdf

Data publikacji:

2012

Wydawca:

Polskie Towarzystwo Symulacji Komputerowej

Tematy:

klasyfikator rozmyty
rozmyta entropia
fuzzy classifier
fuzzy entropy

Opis:

W pracy przedstawiono architekturę klasyfikatora rozmytego opartego na entropii rozmytej oraz zbadano jego wydajność na standardowych zestawach danych: Iris i Wisconsin breast cancer. Wyniki symulacji pokazują, że przedstawiony klasyfikator daje zadawalające wskaźniki klasyfikacji.
In this paper, we present the architecture of fuzzy classifier based on fuzzy entropy and examine its performance on Iris and Wisconsin breast cancer data sets. Simulation results show that the presented classifier has a satisfactory classification rate.

Źródło:

Symulacja w Badaniach i Rozwoju; 2012, 3, 2; 99-106
2081-6154

Pojawia się w:

Symulacja w Badaniach i Rozwoju

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 76.

Tytuł:

Induction motor fault classification via entropy and column correlation features of 2D represented vibration data

Autorzy:

Basaran, Murat
Fidan, Mehmet

Powiązania:

https://bibliotekanauki.pl/articles/1841827.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN

Tematy:

entropy
fault diagnosis
support vector machines
wavelet transforms

Opis:

Due to long-term use under challenging conditions, the sub-elements of induction motors may suffer certain defects over time. Such defects impair the vibration characteristics of the motors in different ways, depending on the type of defect. Therefore, the change in vibration characteristic provides indicators about the fault type and can be used in preventive maintenance strategies to ensure safe operation of the system. In this work, discrete-time vibration data were transformed into 2-dimensional grey-level images and decomposed into individual components by the Wavelet decomposition method. Features based on entropy and column correlation were extracted from these components and used to classify motor faults by using the Support Vector Machine method implemented by using the Sequential Minimal Optimisation algorithm. When the selected classifier is compared with other popular Machine Learning algorithms, it is observed that motor faults are more successfully classified, and these observations are presented in detail with comparative classification performance results.

Źródło:

Eksploatacja i Niezawodność; 2021, 23, 1; 132-142
1507-2711

Pojawia się w:

Eksploatacja i Niezawodność

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 77.

Tytuł:

Using of Entropy at Estimation Business Risks

Autorzy:

Savina, Nataliia B.
Slyusarenko, Nina V.
Yakobchuk, Maryna S.
Gromaszek, Konrad
Smailova, Saule
Muslimov, Kuanysh

Powiązania:

https://bibliotekanauki.pl/articles/1844675.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

information uncertainty
entropy
risk
indicators of business project

Opis:

The possibility and expediency of estimation of risk factors based on fundamental positions of information and entropy are grounded. In accordance with the principle of addiction, the possibility of using the H-criterion as an indicator of business uncertainty is shown. The algorithm of risk estimation of these investments is offered.

Źródło:

International Journal of Electronics and Telecommunications; 2021, 67, 2; 169-174
2300-1933

Pojawia się w:

International Journal of Electronics and Telecommunications

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 78.

Tytuł:

Flow of Stokesian fluid through a cellular medium and thermal effects

Autorzy:

Wojnar, R.

Powiązania:

https://bibliotekanauki.pl/articles/201428.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

porous media
Onsager’s principle
entropy
heat production

Opis:

The thermal effects of a stationary Stokesian flow through an elastic micro-porous medium are compared with the entropy produced by Darcy’s flow. A micro-cellular elastic medium is considered as an approximation of the elastic porous medium. It is shown that after asymptotic two-scale analysis these two approaches, one analytical, starting from Stoke’s equation and the second phenomenological, starting from Darcy’s law give the same result. The incompressible and linearly compressible fluids are considered, and it is shown that in micro-porous systems the seepage of both types of fluids is described by the same equations.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 2; 321-329
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 79.

Tytuł:

Optimizing information processing in brain-inspired neural networks

Autorzy:

Paprocki, B.
Pregowska, A.
Szczepanski, J.

Powiązania:

https://bibliotekanauki.pl/articles/202095.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

neural network
entropy
mutual information
noise
inhibitory neuron

Opis:

The way brain networks maintain high transmission efficiency is believed to be fundamental in understanding brain activity. Brains consisting of more cells render information transmission more reliable and robust to noise. On the other hand, processing information in larger networks requires additional energy. Recent studies suggest that it is complexity, connectivity, and function diversity, rather than just size and the number of neurons, that could favour the evolution of memory, learning, and higher cognition. In this paper, we use Shannon information theory to address transmission efficiency quantitatively. We describe neural networks as communication channels, and then we measure information as mutual information between stimuli and network responses. We employ a probabilistic neuron model based on the approach proposed by Levy and Baxter, which comprises essential qualitative information transfer mechanisms. In this paper, we overview and discuss our previous quantitative results regarding brain-inspired networks, addressing their qualitative consequences in the context of broader literature. It is shown that mutual information is often maximized in a very noisy environment e.g., where only one-third of all input spikes are allowed to pass through noisy synapses and farther into the network. Moreover, we show that inhibitory connections as well as properly displaced long-range connections often significantly improve transmission efficiency. A deep understanding of brain processes in terms of advanced mathematical science plays an important role in the explanation of the nature of brain efficiency. Our results confirm that basic brain components that appear during the evolution process arise to optimise transmission performance.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 2; 225-233
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 80.

Tytuł:

Entropy generation in a condenser and related correlations

Autorzy:

Laskowski, R.
Jaworski, M.
Smyk, A.

Powiązania:

https://bibliotekanauki.pl/articles/240683.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

steam condenser
entropy generation
kondensator pary
generowanie entropii

Opis:

The paper presents an analysis of relations describing entropy generation in a condenser of a steam unit. Connections between entropy generation, condenser ratio, and heat exchanger effectiveness, as well as relations implied by them are shown. Theoretical considerations allowed to determine limits of individual parameters which describe the condenser operation. Various relations for average temperature of the cold fluid were compared. All the proposed relations were verified against data obtained using a simulator and actual measurement data from a 200 MW unit condenser. Based on data from a simulator it was examined how the sum of entropy rates, steam condenser effectiveness, terminal temperature difference and condenser ratio vary with the change in the inlet cooling water temperature, mass flow rate of steam and the cooling water mass flow rate.

Źródło:

Archives of Thermodynamics; 2015, 36, 2; 27-48
1231-0956
2083-6023

Pojawia się w:

Archives of Thermodynamics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 81.

Tytuł:

Multi-Criteria Decision Making of Abrasive Water Jet Machining Process for 2024-T3 Alloy Using Hybrid Approach

Autorzy:

Khudhir, Waqass S.
Abbood, Mohanad Qusay
Shukur, Jalil J.

Powiązania:

https://bibliotekanauki.pl/articles/2204890.pdf

Data publikacji:

2022

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

TOPSIS
entropy
image processing
abrasive water jet machining

Opis:

Abrasive Water Jet Machining (AWJM) is one of the most environmentally friendly non-conventional machining processes, which can be employed to cut hard and thin materials without any thermal effects. In this study, the Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) has been combined with the Entropy method and employed to find out the multi-criteria decision-making of process parameters. Experimental investigations have been conducted to evaluate the performance of the AWJM process in terms of surface roughness (Ra) and kerf angle (Ka). The selected process parameters are a stand-off distance (SOD), traverse speed (TS), and abrasive flow rate (AFL), whereas the AL-alloy 2024-T3 was selected as the work piece material. The image process technique has been utilized to measure the values of the Ka. The results demonstrate that the optimal solutions of the AWJM process, which give the smallest value of Ra and minimizes Ka, are 2mm, 20mm/min, and 100 g/min, for SOD, TS, and AFL respectively.

Źródło:

Advances in Science and Technology. Research Journal; 2022, 16, 5; 155--162
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 82.

Tytuł:

Determination of yield point of structural materials with using the metric entropy

Autorzy:

Garbacz, G.
Kyzioł, L.

Powiązania:

https://bibliotekanauki.pl/articles/243835.pdf

Data publikacji:

2014

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

yield point
construction materials
metric entropy by Kolmogorov-Sinai

Opis:

The yield point is one of the basic characteristics of construction materials, which are used in the design engineering calculations. The methods used to determine the yield point is based on the interpretation of the geometric shape of the curve uniaxial tension. This shape is specific for different construction materials and depends among others to the conditions carrying trials. Specific guidelines for determining the yield point were included in the standards specification. The conventionality of procedure concerns especially materials, which, in their deformation characteristic do not have a distinct top of knee. The authors propose an alternative method based on the use of the concept of the metric entropy by Kolmogorov-Sinai. The metric entropy by Kolmogorov-Sinai is used to study the phenomena about a dynamic character. Therefore, this method requires the recording of more number of measuring points: from a few hundred to a dozen thousand, depending on the type of research of constructional materials. A dynamic character of measurement data results from their scatter, which consists of local, non-linear disturbances occurring during deformation of the material and the noise, associated from the action of acquisition path. The aim of the study is to present a more objective method of determining the yield point structural materials, which do not require the use of conventional procedures. The paper presents the results determining of this constant material on the basis of data records monoaxially stretching of tests for metals used in shipbuilding.

Źródło:

Journal of KONES; 2014, 21, 3; 97-104
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 83.

Tytuł:

Isomorphic random Bernoulli shifts

Autorzy:

Gundlach, V.
Ochs, G.

Powiązania:

https://bibliotekanauki.pl/articles/965196.pdf

Data publikacji:

2000

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

fibre entropy
random dynamical system
random shift
relative isomorphism

Opis:

We develop a relative isomorphism theory for random Bernoulli shifts by showing that any random Bernoulli shifts are relatively isomorphic if and only if they have the same fibre entropy. This allows the identification of random Bernoulli shifts with standard Bernoulli shifts.

Źródło:

Colloquium Mathematicum; 2000, 84/85, 2; 327-344
0010-1354

Pojawia się w:

Colloquium Mathematicum

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 84.

Tytuł:

Adaptive control of system entropy

Autorzy:

Banek, T.
Kozłowski, E.

Powiązania:

https://bibliotekanauki.pl/articles/969950.pdf

Data publikacji:

2006

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

adaptacyjny układ sterowania
entropia
adaptive control
active learning
entropy

Opis:

Controlling entropy of a system with unknown parameters is treated here as an adaptive control problem. Necessary conditions for optimality and an algorithm for computing extremal controls in the spirit of R. Rishel are obtained.

Źródło:

Control and Cybernetics; 2006, 35, 2; 279-289
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 85.

Tytuł:

Entropy and dynamics of soil-plant system

Autorzy:

Ermakov, E.I.
Mukhomorov, V.K.

Powiązania:

https://bibliotekanauki.pl/articles/25481.pdf

Data publikacji:

2003

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Tematy:

cultivation
soil formation
diversity
entropy
soil-plant system
dynamics

Źródło:

International Agrophysics; 2003, 17, 1
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 86.

Tytuł:

Fabrication and Characterization of CoCrFeNiMn High Entropy Alloy Powder Processed by Gas Atomization

Autorzy:

Park, T. G.
Lee, S. H.
Lee, B.
Cho, H. M.
Choi, W. J.
Kim, B. S.
Shin, K. S.
Kim, T.-S.

Powiązania:

https://bibliotekanauki.pl/articles/353649.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

high entropy alloy
gas atomization
spark plasma sintering
CoCrFeNiMn

Opis:

In this study, precisely controlled large scale gas atomization process was applied to produce spherical and uniform shaped high entropy alloy powder. The gas atomization process was carried out to fabricate CoCrFeNiMn alloy, which was studied for high ductility and mechanical properties at low temperatures. It was confirmed that the mass scale, single phase, equiatomic, and high purity spherical high entropy alloy powder was produced by gas atomization process. The powder was sintered by spark plasma sintering process with various sintering conditions, and mechanical properties were characterized. Through this research, we have developed a mass production process of high quality and spherical high entropy alloy powder, and it is expected to expand applications of this high entropy alloy into fields such as powder injection molding and 3D printing for complex shaped components.

Źródło:

Archives of Metallurgy and Materials; 2018, 63, 2; 1055-1059
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 87.

Tytuł:

Predicting Polish transport industry equilibrium characteristics as an inverse problem: An Entropy Econometrics Model

Autorzy:

Bwanakare, Second
Cierpiał-Wolan, Marek

Powiązania:

https://bibliotekanauki.pl/articles/1058997.pdf

Data publikacji:

2020-12-04

Wydawca:

Główny Urząd Statystyczny

Tematy:

transport industry
inverse problem
econometrics
non-extensive entropy econometrics

Opis:

The business environment dynamics is governed by a high degree of uncertainty and risk; consequently, in a majority of cases investors face serious difficulties when making business decisions. Additionally, when detailed statistical information relating to industry is missing, any decisions may become a matter of highly risky conjectures. The present article proposes a simultaneous equation model based on the entropy econometrics estimator for recovering some key industrial subsector long-term equilibrium characteristics in the situation where only sparse, insufficient statistical information is available (e.g. only aggregated data on the whole industry). The model is applied to the transportation equipment manufacturing industry in Poland, which is composed of eight sub-sectors. As a result of the above procedure, an observation has been made that all firms from different sub-sectors have to increase their steady-state concentration ratios, while the highest concentration corresponds to the lowest increase in profitability. The model outputs conform to the market tendency in this sector and should lead to further applications of the NCEE methodology in business activity on a worldwide scale.

Źródło:

Statistics in Transition new series; 2020, 21, 5; 179-191
1234-7655

Pojawia się w:

Statistics in Transition new series

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 88.

Tytuł:

Znaczenie intuicji językowej w procesie antycypacji – na przykładzie komunikacji obcojęzycznej
The importance of linguistic intuition in the process of anticipation – on the example of foreign language communication

Autorzy:

Piegzik, Wioletta A.

Powiązania:

https://bibliotekanauki.pl/articles/1929461.pdf

Data publikacji:

2021-12-22

Wydawca:

Akademia im. Jakuba z Paradyża w Gorzowie Wielkopolskim

Tematy:

linguistic intuition
foreign language communication
anticipation
redundancy
entropy
negentropy

Opis:

This paper presents the phenomenon of anticipation which is one of the manifestations of linguistic maturity and language user rationality. Anticipation, taking place essentially in implicit structures and based on evolutionary old intuition, improves speech comprehension and increases the efficiency of cognitive processes. The phenomenon in question is presented on the example of foreign language communication, because it is there that the mechanisms governing the formulation of accurate hypotheses about form and content are particularly evident. The first part of the article discusses speech perception, and with it the categorization and selection of an appropriate cognitive schema conditioning accurate anticipation. The second part presents factors that facilitate and hinder the right hypothesis. Finally, conclusions and directions for future research on anticipation are formulated.

Źródło:

Język. Religia. Tożsamość; 2021, 2 (24) A; 137-149
2083-8964
2544-1701

Pojawia się w:

Język. Religia. Tożsamość

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 89.

Tytuł:

CLASSIFICATION OF POLISH HOUSEHOLDS BASED ON THEIR INCOMES BY MEANS OF DECISION TREES

Autorzy:

Karpio, Andrzej
Koszela, Grzegorz
Orłowski, Arkadiusz
Łukasiewicz, Piotr

Powiązania:

https://bibliotekanauki.pl/articles/452905.pdf

Data publikacji:

2014

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki

Tematy:

income distribution
high incomes
classification trees
entropy
SQL Server

Opis:

Classification trees included in SQL Server 2008R2 Analysis Services package have been used to classify Polish households based on their incomes. The analysis has been performed by means of the three algorithms and their effectiveness has been measured. Using the best algorithm a groups of households with the lowest and the largest incomes have been distinguished. The most important attributes describing households with the lowest and the largest incomes were identified and discussed.

Źródło:

Metody Ilościowe w Badaniach Ekonomicznych; 2014, 15, 2; 403-413
2082-792X

Pojawia się w:

Metody Ilościowe w Badaniach Ekonomicznych

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 90.

Tytuł:

Topological entropy on zero-dimensional spaces

Autorzy:

Bobok, Jozef
Zindulka, Ondřej

Powiązania:

https://bibliotekanauki.pl/articles/1205133.pdf

Data publikacji:

1999

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

dynamical system
topological entropy
homeomorphism
zero-dimensional compact space

Opis:

Let X be an uncountable compact metrizable space of topological dimension zero. Given any a ∈[0,∞] there is a homeomorphism on X whose topological entropy is a.

Źródło:

Fundamenta Mathematicae; 1999, 162, 3; 233-249
0016-2736

Pojawia się w:

Fundamenta Mathematicae

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 91.

Tytuł:

Entropic evolution of lexical richness of homogeneous texts over time : A dynamic complexity perspective

Autorzy:

Zhang, Y.

Powiązania:

https://bibliotekanauki.pl/articles/103947.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Instytut Podstaw Informatyki PAN

Tematy:

dynamic complexity
lexical richness
entropy
homogenous texts
language modeling

Opis:

This work concerns the evolving pattern of the lexical richness of the corpus text of China Government Work Report measured by entropy, based on a fundamental assumption that these texts are linguistically homogeneous. The corpus is interpreted and studied as a dynamic system, the components of which maintain spontaneous variations, adjustment, self-organizations, and adaptations to fit into the semantic, discourse, and sociolinguistic functions that the text is set to perform. Both the macroscopic structural trend and the microscopic fluctuations of the time series of the interested entropic process are meticulously investigated from the dynamic complexity theoretical perspective. Rigorous nonlinear regression analysis is provided throughout the study for empirical justifications to the theoretical postulations. An overall concave model with modulated fluctuations incorporated is proposed and statistically tested to represent the key quantitative findings. Possible extensions of the current study are discussed.

Źródło:

Journal of Language Modelling; 2015, 3, 2; 569-599
2299-856X
2299-8470

Pojawia się w:

Journal of Language Modelling

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 92.

Tytuł:

Evaluation of thermodynamic properties for the biosorption of chromium by using cherry leaves (Muntingia calabura L.)

Autorzy:

Aathithya, R.
Sowparnika, J.R.
Balakrishnan, V.

Powiązania:

https://bibliotekanauki.pl/articles/11897.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

thermodynamic property
biosorption
chromium
cherry
leaf
Muntingia calabura
entropy

Opis:

Chromium is a heavy metal which has widely used in tannery and electroplating industries. Contaminations of these industrial metals into the river possess major threat to an environment. Therefore, biosorption is a technique which is applied for the sorption of heavy metal by a biomaterial. In the present study reveals that cherry leaves was used as a biomaterial and for that the thermodynamic properties was evaluated for the biosorption of chromium. From the thermodynamic studies it was found that the reaction was feasible, spontaneous and exothermic because the values of ΔG = negative, ΔS = negative and ΔH = positive. So, it was concluded that the experiment was thermodynamically feasible.

Źródło:

International Letters of Natural Sciences; 2014, 20
2300-9675

Pojawia się w:

International Letters of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 93.

Tytuł:

On wavelet based enhancing possibilities of fuzzy classification methods

Autorzy:

Lilik, Ferenc
Solecki, Levente
Sziová, Brigita
Kóczy, László T.
Nagy, Szilvia

Powiązania:

https://bibliotekanauki.pl/articles/384751.pdf

Data publikacji:

2020

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów

Tematy:

fuzzy classification
wavelet analysis
fuzzy rule interpolation
structural entropy

Opis:

If the antecedents of a fuzzy classification method are derived from pictures or measured data, it might have too many dimensions to handle. A classification scheme based on such data has to apply a careful selection or processing of the measured results: either a sampling, re‐ sampling is necessary. or the usage of functions, transfor‐ mations that reduce the long, high dimensional observed data vector or matrix into a single point or to a low num‐ ber of points. Wavelet analysis can be useful in such cases in two ways. As the number of resulting points of the wavelet ana‐ lysis is approximately half at each filters, a consecutive application of wavelet transform can compress the me‐ asurement data, thus reducing the dimensionality of the signal, i.e., the antecedent. An SHDSL telecommunication line evaluation is used to demonstrate this type of appli‐ cability, wavelets help in this case to overcome the pro‐ blem of a one dimensional signal sampling. In the case of using statistical functions, like mean, variance, gradient, edge density, Shannon or Rényi en‐ tropies for the extraction of the information from a pic‐ ture or a measured data set, and they don not produce enough information for performing the classification well enough, one or two consecutive steps of wavelet analy‐ sis and applying the same functions for the thus resulting data can extend the number of antecedents, and can dis‐ till such parameters that were invisible for these functi‐ ons in the original data set. We give two examples, two fuzzy classification schemes to show the improvement caused by wavelet analysis: a measured surface of a com‐ bustion engine cylinder and a colonoscopy picture. In the case of the first example the wear degree is to be deter‐ mine, in the case of the second one, the roundish polyp content of the picture. In the first case the applied statisti‐ cal functions are Rényi entropy differences, the structural entropies, in the second case mean, standard deviation, Canny filtered edge density, gradients and the entropies. In all the examples stabilized KH rule interpolation was used to treat sparse rulebases.

Źródło:

Journal of Automation Mobile Robotics and Intelligent Systems; 2020, 14, 2; 32-41
1897-8649
2080-2145

Pojawia się w:

Journal of Automation Mobile Robotics and Intelligent Systems

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 94.

Tytuł:

Rates of convergence for the maximum likelihood estimator in the convolution model

Autorzy:

Majerski, P.

Powiązania:

https://bibliotekanauki.pl/articles/254930.pdf

Data publikacji:

2006

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

maximum likelihood estimator
entropy
Hellinger distance
rate of convergence

Opis:

Rates of convergence for the maximum likelihood estimator in the convolution model, obtained recently by S. van de Geer, are reconsidered and corrected.

Źródło:

Opuscula Mathematica; 2006, 26, 1; 99-108
1232-9274
2300-6919

Pojawia się w:

Opuscula Mathematica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 95.

Tytuł:

The Magnetic Entropy Changes in Pb Doped Ni-Mn-Cu-Ga Alloys

Autorzy:

Sielicki, K.
Zygmuntowicz, J.
Wróblewski, R.
Leonowicz, M.

Powiązania:

https://bibliotekanauki.pl/articles/354050.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

magnetocaloric effect
magnetic entropy change
Curie temperature
Heusler alloys

Opis:

Effect of Pb addition on magnetocaloric properties of Ni₅₀ Mn_18,75 Cu_6,25-aPb_aGa₂₅ (a = 1, 2, 3, 4, 5) alloys was investigated experimentally. The magnetic measurements conducted at low field of 4 kA/m showed that addition of Pb led to separation of the both transformation temperatures and significantly shifted the structural transition effect towards lower temperatures as well as increased the Curie temperature. The analysis of isothermal magnetic curves allowed for the calculation of magnetic entropychange (ΔS_M). Although the peak values of |ΔS_M| for alloys containing 4 and 5 at.% Pb, ~3 J/(kg*K) and ~1.5 J/(kg*K) respectively, are low they stretch over the structural transformation and Curie temperature, and are at least 30 K wide at half maximum height.

Źródło:

Archives of Metallurgy and Materials; 2020, 65, 2; 823-825
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 96.

Tytuł:

Microstructure and Electrochemical Behaviors of Equiatomic TiMoVCrZr and Ti-rich TiMoVCrZr High-Entropy Alloys for Metallic Biomaterials

Autorzy:

Song, Hocheol
Lee, Seongi
Lee, Kwangmin

Powiązania:

https://bibliotekanauki.pl/articles/356543.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

high entropy alloy
TiMoVCrZr
hot isostatic pressing
potentiodynamic polarization

Opis:

The present study investigated various thermodynamic parameters, microstructures and electrochemical behaviors of TiMoVCrZr and Ti-rich TiMoVCrZr high-entropy alloys (HEAs) prepared by vacuum arc remelting. The microstructures of the alloys were analyzed using X-ray diffraction (XRD) analysis, field emission scanning electron microscopy (FE-SEM), and potentiodynamic polarization tests. The determined thermodynamic values of the Ω-parameter and the atomic size difference (δ) for the HEAs were determined to be in the range of Ω ≥ 1.1, and δ ≤ 6.6% with valance electron configuration (VEC) ≤ 5.0, suggesting the HEAs were effective at forming solid solutions. XRD patterns of the equiatomic Ti₂₀ Mo₂₀ V₂₀ Cr₂₀ Zr₂₀ HEA revealed four phases consisting of the body centered cubic₁ (BCC₁ ), BCC₂ , hexagonal close-packed (HCP), and intermetallic compound Cr₂ Zr phases. Three phases were observed in the XRD patterns of Ti-rich Ti₄₀ Mo₁₅ V₁₅ Cr₁₅ Zr₁₅ (BCC, HCP, and Cr₂ Zr) and a single BCC phase was observed in Ti-rich Ti₆₀ Mo₁₀ V₁₀ Cr₁₀ Zr₁₀ HEAs. The backscattered-electron (BSE) images on the equiatomic Ti₂₀ Mo₂₀ V₂₀ Cr₂₀ Zr₂₀ HEA revealed BCC and HCP phases with Cr₂ Zr precipitates, suggesting precipitation from the HCP solid solution during the cooling. The micro-segregation of Ti-rich Ti₆₀ Mo₁₀ V₁₀ Cr₁₀ Zr₁₀ HEAs appeared to decrease remarkably. The alloying elements in the HEAs were locally present and no phase changes occurred even after additional HIP treatment. The lowest current density obtained in the polarization potential test of Ti-rich Ti₄₀ Mo₁₅ V₁₅ Cr₁₅ Zr₁₅ HEA was 7.12×10^-4 mA/cm² was obtained. The studied TiMoVCrZr HEAs showed improved corrosion characteristics as compared to currently available joint replacement material such as ASTM F75 alloy.

Źródło:

Archives of Metallurgy and Materials; 2020, 65, 4; 1317-1322
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 97.

Tytuł:

Microstructure of Multi-Component Ni35Ti35Ta10Co10Cu10 Alloy

Autorzy:

Glowka, K.
Zubko, M.
Świec, P.
Prusik, K.
Dercz, G.
Matyja, E.
Stróż, D.

Powiązania:

https://bibliotekanauki.pl/articles/353190.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

high entropy alloys
multi-component alloys
electron microscopy
microstructure

Opis:

A new NiTi-based multi-component Ni₃₅ Ti₃₅ Ta₁₀ Co₁₀ Cu₁₀ (at.%) alloy was obtained by vacuum arc melting. The microstructure of the alloy has been studied using scanning and transmission electron microscopy, backscatter electron diffraction and X-ray diffraction techniques. The performed measurements showed presence of two cubic and one tetragonal phases. Energy dispersive X-ray spectroscopy analysis confirmed that all the observed phases contained all five principal elements.

Źródło:

Archives of Metallurgy and Materials; 2019, 64, 2; 715-719
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 98.

Tytuł:

Relationship Between Energy and Information

Autorzy:

Górecki, H.

Powiązania:

https://bibliotekanauki.pl/articles/911194.pdf

Data publikacji:

2000

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

entropy of information
energy
stabilization
DC motor
white noise

Opis:

Two ways of speed stabilization of the D.C. motor are considered. One way consists in the use of additional kinetic energy accumulated in a wheel with a large moment of inertia J. The other consists in the use of additional information supplied by a feedback loop with gain K. In both the cases the motor is under the influence of the same white Gaussion noise. These two ways of stabilization are compared under the assumption of the same value of the speed error in the steady state.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2000, 10, 2; 405-411
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 99.

Tytuł:

Kalman filter based method for fault diagnosis of analog circuits

Autorzy:

Li, X.
Xie, Y.
Bi, D.
Ao, Y.

Powiązania:

https://bibliotekanauki.pl/articles/221517.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

analog fault diagnosis
signature extraction
Kalman filter
Shannon entropy

Opis:

This paper presents a Kalman filter based method for diagnosing both parametric and catastrophic faults in analog circuits. Two major innovations are presented, i.e., the Kalman filter based technique, which can significantly improve the efficiency of diagnosing a fault through an iterative structure, and the Shannon entropy to mitigate the influence of component tolerance. Both these concepts help to achieve higher performance and lower testing cost while maintaining the circuit.s functionality. Our simulations demonstrate that using the Kalman filter based technique leads to good results of fault detection and fault location of analog circuits. Meanwhile, the parasitics, as a result of enhancing accessibility by adding test points, are reduced to minimum, that is, the data used for diagnosis is directly obtained from the system primary output pins in our method. The simulations also show that decision boundaries among faulty circuits have small variations over a wide range of noise-immunity requirements. In addition, experimental results show that the proposed method is superior to the test method based on the subband decomposition combined with coherence function, arisen recently.

Źródło:

Metrology and Measurement Systems; 2013, 20, 2; 307-322
0860-8229

Pojawia się w:

Metrology and Measurement Systems

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 100.

Tytuł:

Development of High Entropy Alloy as Catalyst for Azo Dye Degradation in Fenton Process

Autorzy:

Hassan, Nur Hudawiyah Abu
Nasir, Nisa Syukrina Mat
Rahman, S. N. A.
Irfan, Abd Rahim
Nordin, Norhuda Hidayah

Powiązania:

https://bibliotekanauki.pl/articles/2203739.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

azo dye
catalyst
fenton process
high entropy alloys
HEAs

Opis:

Azo dye is widely used in the textile industry since it is cost effective and simple to use. However, it becomes a continuous source of environmental pollution due to its carcinogenicity and toxicity. Various methods had been used to remove the azo dye in solution. One of the famous and frequently used is the Fenton process. The Fenton process is one of the advanced oxidation processes where iron catalysed hydrogen peroxide to generate hydroxyl radical. Treating azo dyes in solution requires a catalyst to enhance the process of degradation. Herein, high entropy alloys (HEAs) have been proposed as a catalytic material to enhance the performance of Fenton process for azo dye degradation. HEAs have been reported as a promising catalyst due to its high surface area. The higher the number of active sites, the higher the rate of azo dye degradation as more active sites are available for adsorption of azo dyes. The results have shown that HEAs can be used as a catalyst to fasten the Fenton reaction since the degradation time is proven to be shorter in the presence of HEAs. The method derived from the result of this study will contribute in treating azo dyes for wastewater management in the Fenton process.

Źródło:

Archives of Metallurgy and Materials; 2023, 68, 1; 209--213
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce