Temat: Entropy - Katalog OPAC zbiorów

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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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