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Wyświetlanie 1-15 z 413
Tytuł:
Zarys koncepcji zrównoważonego bezpieczeństwa energetycznego
Conception of sustainable energy safety in a nutshell
Autorzy:
Adamkiewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/323891.pdf
Data publikacji:
2017
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
rozwój zrównoważony
bezpieczeństwo energetyczne
energetyka zrównoważona
wymiar społeczny energetyki
sustainable development
energy security
sustainable energy
social dimension of energy
Opis:
Artykuł podejmuje tematykę bezpieczeństwa energetycznego w kontekście dezyderatów koncepcji zrównoważonego rozwoju. Przedstawione zostaną główne założenia energetyki zrównoważonej wraz z przykładami ich zastosowania w innych krajach oraz oceną możliwości implementacji na grunt polskiego systemu energetycznego, uwzględniając kryterium bezpieczeństwa. Przedstawiona zostanie również propozycja modelu energetycznego łączącego postulaty rozwoju zrównoważonego ze specyfiką społeczno-gospodarczą i środowiskową Polski.
The major issue of the article is energy security in the context of the desiderata concept of sustainable development. It presents the main principles of sustainable energy, together with examples of its practical application in other countries and the assessment of the possibility to implementation in Polish energy system, taking into account the safety criterions. Author presents also a proposition to the energy model which combines the postulates of sustainable development with local socio-economic and environmental specifics of Poland.
Źródło:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2017, 104; 103-114
1641-3466
Pojawia się w:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ transformacji lessu na cechy filtracyjne
The impact of loess transformation on its filtration characteristics
Autorzy:
Afelt, A.
Powiązania:
https://bibliotekanauki.pl/articles/2062271.pdf
Data publikacji:
2013
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
less
filtracja
przestrzeń porowa
wymiar fraktalny
loess
filtration
pore space
fractal dimension
Opis:
Przeanalizowano cechy ilościowe i przeprowadzono analizę stopnia uporządkowania przestrzeni porowej (wymiar fraktalny) lessów świeżych oraz przekształconych filtracyjnie. Wykazano powiązanie między słabą wodoprzepuszczalnością lessu świeżego, a procesem formowania retencji powierzchniowej w wymoku i wynikające z tego konsekwencje dla cech mikrostrukturalnych lessu. Wskazano wymoki, jako strefy preferencyjnej filtracji na obszarach lessowych.
The quantitative characteristics have been analysed and the analysis of the degree of the pore space structure (fractal dimension) of natural and transformed loesses has been conducted. The relation between poor water permeability and retention in closed depressions has been prooved and thus the consequences of that for microstructural characteristics of loess has been revealed. Closed depression has been identified as the areas of preferential filtration in loess areas.
Źródło:
Biuletyn Państwowego Instytutu Geologicznego; 2013, 456 Hydrogeologia z. 14/1; 27--32
0867-6143
Pojawia się w:
Biuletyn Państwowego Instytutu Geologicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal control of ∞-dimensional stochastic systems via generalized solutions of HJB equations
Autorzy:
Ahmed, N.
Powiązania:
https://bibliotekanauki.pl/articles/729348.pdf
Data publikacji:
2001
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
optimal control
stochastic systems
infinite dimension
HJB equation
stationary feedback control
Opis:
In this paper, we consider optimal feedback control for stochastc infinite dimensional systems. We present some new results on the solution of associated HJB equations in infinite dimensional Hilbert spaces. In the process, we have also developed some new mathematical tools involving distributions on Hilbert spaces which may have many other interesting applications in other fields. We conclude with an application to optimal stationary feedback control.
Źródło:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2001, 21, 1; 97-126
1509-9407
Pojawia się w:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stochastic diffrential equations on Banach spaces and their optimal feedback control
Autorzy:
Ahmed, N.U.
Powiązania:
https://bibliotekanauki.pl/articles/952179.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
stochastic differential equations
Banach spaces
optimal feedback control
objective functionals
Lévy-Prohorov metric
Hausdorff dimension
time-optimal problems
Opis:
In this paper we consider stochastic differential equations on Banach spaces (not Hilbert). The system is semilinear and the principal operator generating a C₀-semigroup is perturbed by a class of bounded linear operators considered as feedback operators from an admissible set. We consider the corresponding family of measure valued functions and present sufficient conditions for weak compactness. Then we consider applications of this result to several interesting optimal feedback control problems. We present results on existence of optimal feedback operators.
Źródło:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2012, 32, 1; 87-109
1509-9407
Pojawia się w:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation and Ranking the Resilient Suppliers with the Combination of Decision Making Techniques
Autorzy:
Ajalli, Mehdi
Saberifard, Nima
Zinati, Babak
Powiązania:
https://bibliotekanauki.pl/articles/2023981.pdf
Data publikacji:
2021-09
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
key dimension
resilience
supplier
SWARA technique
WASPAS method
ranking
Opis:
Supply chain management emerged as the ultimate management strategy to ensure the competitive advantages of companies in their markets. Suppliers are considered as inevitable sources of external risks in modern supply chains. In this respect, resonance is essential for the ability to adapt in resonance to disturbances and to restore in choosing suppliers. As suppliers of critical resources are vulnerable, choosing better suppliers to create resilience, and thereby reducing the risks in the supply chain as a whole. In recent years, emphasis has been placed on supply chain resilience and resilient suppliers, but few studies have been conducted on the evaluation and selection of resilient suppliers with multi-criteria decision making models. The main purposes of this study are a broad review of the literature on the resilient factor, factorization, efficiency of key factors in the reliance of suppliers and the ranking of resilient suppliers using the combined approach of SWARA and WASPAS. For this purpose, after a comprehensive review of Literature interview with the experts of petrochemical upstream industry, six key factors and overall resilience of suppliers were identified in eighteen factors. Then the weight of the dimensions was determined by using the SWARA method. The output of the method showed that supplier accountability and key performance factors were the most important factors in assessing the resilience of suppliers. Using the supporting method, five resilient suppliers were evaluated based on six dimensions and the final ranking of suppliers was determined. With this ranking, the industry will be a major step towards improving supply chain and increasing suppliers’ resilience to address disruptions and risks, improve supply and achieve competitive advantage and satisfy the consumers’ needs.
Źródło:
Management and Production Engineering Review; 2021, 13, 3; 129-140
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Seismo Magnetic Moment Fractal Dimension for Characterizing Shajara Reservoirs of the Permo-Carboniferous Shajara Formation, Saudi Arabia
Autorzy:
Alkhidir, Khalid Elyas Mohamed Elameen
Powiązania:
https://bibliotekanauki.pl/articles/1030683.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Capillary pressure fractal dimension
Seismo magnetic moment fractal dimension
Shajara Formation
Shajara Reservoirs
Opis:
The quality and assessment of a reservoir can be documented in details by the application of seismo magnetic moment. This research aims to calculate fractal dimension from the relationship among seismo magnetic moment, maximum seismo magnetic moment and wetting phase saturation and to approve it by the fractal dimension derived from the relationship among capillary pressure and wetting phase saturation. Two equations for calculating the fractal dimensions have been employed. The first one describes the functional relationship between wetting phase saturation, seismo magnetic moment, maximum seismo magnetic moment and fractal dimension. The second equation implies to the wetting phase saturation as a function of capillary pressure and the fractal dimension. Two procedures for obtaining the fractal dimension have been utilized. The first procedure was done by plotting the logarithm of the ratio between seismo magnetic moment and maximum seismo magnetic moment versus logarithm wetting phase saturation. The slope of the first procedure = 3- Df (fractal dimension). The second procedure for obtaining the fractal dimension was determined by plotting the logarithm of capillary pressure versus the logarithm of wetting phase saturation. The slope of the second procedure = Df -3. On the basis of the obtained results of the fabricated stratigraphic column and the attained values of the fractal dimension, the sandstones of the Shajara reservoirs of the Shajara Formation were divided here into three units.
Źródło:
World Scientific News; 2020, 139, 2; 186-200
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Labyrinth screw pump theory
Teorija labirintno-vintovykh nasosov
Autorzy:
Andrenko, P.
Lebedev, A.
Powiązania:
https://bibliotekanauki.pl/articles/76818.pdf
Data publikacji:
2014
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
screw pump
working process
flow characteristics
design method
physical model
geometrical dimension
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2014, 16, 6
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fractal analysis of tropical karst relief : South China Karst case study
Autorzy:
Andreychouk, Viacheslav
Blachowicz, Tomasz
Dłużewski, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/2058635.pdf
Data publikacji:
2019
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
fractal dimension
cover factor
tropical karst
South China Karst
Opis:
Areas of tropical karst create the most spectacular earth landscapes from a geomorphological perspective. These areas are characterized by a variety of specific forms resulting from the long-term karst-erosion dismemberment of terrains in favourable humid tropical conditions. Tropical karst areas are extremely diverse from a geomorphological point of view both in terms of local conditions of development and developmental stages. Among the many types of karst relief, the following two basic types can be recognized: fenglin (tower karst) and fengcong (cone karst). The other types can be treated as a mixture of these two basic types. To find potential quantitative rates characterizing the two main types, as well as the mixed types, we calculated fractal dimensions and cover factors of 17 areas located within the two well-known regions of South China Karst - Guilin and Huanjiang. The calculations show that the numerical characteristics obtained, especially the cover factor parameter, can be useful as complementary tools in the recognition and typology of tropical karst relief and landscapes.
Źródło:
Geological Quarterly; 2019, 63, 4; 729--740
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pedagogical Condition at Undergraduate Teacher Preparation
Autorzy:
Andrysová, Pavla
Martincová, Jana
Včelařová, Hana
Powiązania:
https://bibliotekanauki.pl/articles/2032586.pdf
Data publikacji:
2014-12-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
pedagogical condition
psychosomatic preparation
undergraduate teacher preparation
pedagogical environment
psychodidactic dimension
personal dimension
communicative dimension
Opis:
Within the academic preparation of future teachers we quite often notice that the students expect pedagogical or didactic disciplines to give them practical advice and guidelines for their teaching, which is logical. However, every experienced pedagogue knows how unrealistic such expectations are. The study of pedagogical sciences offers information basis, but its knowledge does not guarantee pedagogical mastery to any teacher. Our aim is to enrich the existing form of pedagogical programmes by adding a new dimension of personality development, which we want to achieve through psychosomatic disciplines. Completing this kind of preparation should enable the students to develop the so-called pedagogical condition. Graduates in Teacher Training programmes should then be not only academically educated professionals, but also authentic, self-reflecting personalities, capable of taking responsibility for their action.
Źródło:
The New Educational Review; 2014, 38; 152-165
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intersection Dimension and Graph Invariants
Autorzy:
Aravind, N.R.
Subramanian, C.R.
Powiązania:
https://bibliotekanauki.pl/articles/32083820.pdf
Data publikacji:
2021-02-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
circular dimension
dimensional properties
forbidden-subgraph colorings
Opis:
We show that the intersection dimension of graphs with respect to several hereditary properties can be bounded as a function of the maximum degree. As an interesting special case, we show that the circular dimension of a graph with maximum degree Δ is at most \(O\Big(\Delta\frac{log\Delta}{log log\Delta}\Big)\). It is also shown that permutation dimension of any graph is at most $\Delta(log \Delta)^{1+o(1)}$. We also obtain bounds on intersection dimension in terms of treewidth.
Źródło:
Discussiones Mathematicae Graph Theory; 2021, 41, 1; 153-166
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Three-dimensional Model of Resistance in Education
Autorzy:
Babicka-Wirkus, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1969549.pdf
Data publikacji:
2018-06-30
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
three-dimensional model of resistance
action dimension of resistance
motivation dimension of resistance
space dimension of resistance
education
Opis:
The article attempts to systematize the issue of resistance manifestations in the context of education. The analyses presented in the article are an introduction to designing a three-dimensional model of resistance, which enables to examine acts of resistance from the angle of their three intertwined aspects: action, space and motivation. They are basic layers determining the analysis range of particular displays of resistance in education and society. These dimensions were developed based on the analysis of theoretical and empirical literature regarding the issue of resistance and on the author’s own research on this phenomenon.
Źródło:
The New Educational Review; 2018, 52; 43-54
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the topological dimension of the solutions sets for some classes of operator and differential inclusions
Autorzy:
Bader, Ralf
Gel'man, Boris
Kamenskii, Mikhail
Obukhovskii, Valeri
Powiązania:
https://bibliotekanauki.pl/articles/729534.pdf
Data publikacji:
2002
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
solutions set
fixed points set
topological dimension
multivalued map
condensing map
topological degree
differential inclusion
periodic problem
Opis:
In the present paper, we give the lower estimation for the topological dimension of the fixed points set of a condensing continuous multimap in a Banach space. The abstract result is applied to the fixed point set of the multioperator of the form $ = S _F$ where $_F$ is the superposition multioperator generated by the Carathéodory type multifunction F and S is the shift of a linear injective operator. We present sufficient conditions under which this set has the infinite topological dimension. In the last section of the paper, we consider the applications of the solutions sets for Cauchy and periodic problems for semilinear differential inclusions in a Banach space.
Źródło:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2002, 22, 1; 17-32
1509-9407
Pojawia się w:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Error-Correcting Codes from k -Resolving Sets
Autorzy:
Bailey, Robert F.
Yero, Ismael G.
Powiązania:
https://bibliotekanauki.pl/articles/31343451.pdf
Data publikacji:
2019-05-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
error-correcting code
k -resolving set
k -metric dimension
covering design
uncovering
grid graph
Opis:
We demonstrate a construction of error-correcting codes from graphs by means of k-resolving sets, and present a decoding algorithm which makes use of covering designs. Along the way, we determine the k-metric dimension of grid graphs (i.e., Cartesian products of paths).
Źródło:
Discussiones Mathematicae Graph Theory; 2019, 39, 2; 341-355
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Statistical analysis of petrophysical parameters of Middle Miocene rocks from the Polish Carpathian Foredeep
Autorzy:
Bala, M. J.
Jarzyna, J. A.
Mortimer, Z.
Powiązania:
https://bibliotekanauki.pl/articles/2060540.pdf
Data publikacji:
2012
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Middle Miocene
Carpathian Foredeep
fractal correlation dimension
statistical analysis
well logging data
Opis:
Sarmatian thin-bedded sandstone and shales have been a subject of statistical studies to differentiate between good and poor reservoir rocks and to show gas-saturated layers in comparison to water-saturated strata. Statistical studies including fractal analysis were performed on well logging data from the Sędziszów 34 borehole drilled in a belt of hydrocarbon deposits that continue below the northern edge of the Carpathian–Stebnik overthrust. Lithological variability and porosity differentiation and changes in water saturation were traced on the basis of the results of well logging interpretation. Basic statistics and histograms of petrophysical parameters have been analysed. A generalized second order fractal correlation dimension was calculated for all parameters and analysed as for a time series. Fractal dimensions did not correlated with the parameters, but good positive correlations between them and the parameters were observed and showed that the curves analysed had the same type of complexity. High correlation coefficients showed pairs of fractal dimensions for those parameters which had similar variability and the same curve roughness. The fractal correlation dimension described the type of complexity of the parameter (curve roughness) and indicated, for example, how shaliness influenced the reservoir properties of the local Middle Miocene. Therefore, the results were also useful in practice, which gave extra information on thin-bedded reservoir rocks.
Źródło:
Geological Quarterly; 2012, 56, 4; 665--680
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of compact subsets of algebraic varieties in terms of Bernstein type inequalities
Autorzy:
Baran, M.
Pleśniak, W.
Powiązania:
https://bibliotekanauki.pl/articles/1206009.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
pluricomplex Green function
Siciak extremal function
traces of polynomials on semialgebraic sets
Zariski dimension
Bernstein and van der Corput-Schaake type inequalities
Opis:
We show that in the class of compact sets K in $ℝ^n$ with an analytic parametrization of order m, the sets with Zariski dimension m are exactly those which admit a Bernstein (or a van der Corput-Schaake) type inequality for tangential derivatives of (the traces of) polynomials on K.
Źródło:
Studia Mathematica; 2000, 141, 3; 221-234
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 413

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