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Tytuł:
Injective hyperbolicity of domains
Autorzy:
Overholt, Marius
Powiązania:
https://bibliotekanauki.pl/articles/1311489.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
invariant metric
Kobayashi-Royden metric
Hahn metric
S-metric
Opis:
The pseudometric of Hahn is identical to the Kobayashi-Royden pseudometric on domains of dimension greater than two. Thus injective hyperbolicity coincides with ordinary hyperbolicity in this case.
Źródło:
Annales Polonici Mathematici; 1995, 62, 1; 79-82
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Completeness of the Bergman metric on non-smooth pseudoconvex domains
Autorzy:
Chen, Bo
Powiązania:
https://bibliotekanauki.pl/articles/1294051.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
Bergman metric
Opis:
We prove that the Bergman metric on domains satisfying condition S is complete. This implies that any bounded pseudoconvex domain with Lipschitz boundary is complete with respect to the Bergman metric. We also show that bounded hyperconvex domains in the plane and convex domains in $ℂ^n$ are Bergman comlete.
Źródło:
Annales Polonici Mathematici; 1999, 71, 3; 241-251
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Closed Formulae for the Strong Metric Dimension of Lexicographic Product Graphs
Autorzy:
Kuziak, Dorota
Yero, Ismael G.
Rodríguez-Velázquez, Juan A.
Powiązania:
https://bibliotekanauki.pl/articles/31340465.pdf
Data publikacji:
2016-11-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
strong metric dimension
strong metric basis
strong metric generator
lexicographic product graphs
Opis:
Given a connected graph G, a vertex w ∈ V (G) strongly resolves two vertices u, v ∈ V (G) if there exists some shortest u − w path containing v or some shortest v − w path containing u. A set S of vertices is a strong metric generator for G if every pair of vertices of G is strongly resolved by some vertex of S. The smallest cardinality of a strong metric generator for G is called the strong metric dimension of G. In this paper we obtain several relationships between the strong metric dimension of the lexicographic product of graphs and the strong metric dimension of its factor graphs.
Źródło:
Discussiones Mathematicae Graph Theory; 2016, 36, 4; 1051-1064
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Isometric embedding into spaces of continuous functions
Autorzy:
Villa, Rafael
Powiązania:
https://bibliotekanauki.pl/articles/1218403.pdf
Data publikacji:
1998
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
metric space
Banach space
metric linear dimension
Opis:
We prove that some Banach spaces X have the property that every Banach space that can be isometrically embedded in X can be isometrically and linearly embedded in X. We do not know if this is a general property of Banach spaces. As a consequence we characterize for which ordinal numbers α, β there exists an isometric embedding between $C_0(α+1)$ and $C_0(β+1)$.
Źródło:
Studia Mathematica; 1998, 129, 3; 197-205
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cone 2-metric space nad Fixed point theorem of contractive mappings
Autorzy:
Singh, B.
Jain, Shishir
Bhagat, Prakash
Powiązania:
https://bibliotekanauki.pl/articles/746380.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Cone 2-metric space
Fixed point
Cone metric space
2-metric space
Ordered Banach space
Opis:
In this paper we introduce cone 2-metric space and prove some fixed point theorems of a contractive mapping on a cone 2-metric space.
Źródło:
Commentationes Mathematicae; 2012, 52, 2
0373-8299
Pojawia się w:
Commentationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computing the Metric Dimension of a Graph from Primary Subgraphs
Autorzy:
Kuziak, Dorota
Rodríguez-Velázquez, Juan A.
Yero, Ismael G.
Powiązania:
https://bibliotekanauki.pl/articles/31342126.pdf
Data publikacji:
2017-02-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
metric dimension
metric basis
primary subgraphs
rooted product graphs
corona product graphs
Opis:
Let G be a connected graph. Given an ordered set W = {w1, . . ., wk} ⊆ V (G) and a vertex u ∈ V (G), the representation of u with respect to W is the ordered k-tuple (d(u, w1), d(u, w2), . . ., d(u, wk)), where d(u, wi) denotes the distance between u and wi. The set W is a metric generator for G if every two different vertices of G have distinct representations. A minimum cardinality metric generator is called a metric basis of G and its cardinality is called the metric dimension of G. It is well known that the problem of finding the metric dimension of a graph is NP-hard. In this paper we obtain closed formulae for the metric dimension of graphs with cut vertices. The main results are applied to specific constructions including rooted product graphs, corona product graphs, block graphs and chains of graphs.
Źródło:
Discussiones Mathematicae Graph Theory; 2017, 37, 1; 273-293
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Design of an Objective Metric and Construction of a Prototype System for Monitoring Perceived Quality (QoE) of Video Sequences
Autorzy:
Janowski, L.
Leszczuk, M.
Papir, Z.
Romaniak, P.
Powiązania:
https://bibliotekanauki.pl/articles/307891.pdf
Data publikacji:
2011
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
mean opinion score
no reference metric
objective metric
quality of experience
video artefacts
Opis:
The paper presents different no reference (NR) objective metrics addressing the most important artefacts for raw (source) video sequences (noise, blur, exposure) and those introduced by compression (blocking, flickering) which can be used for assessing quality of experience. The validity of all metrics was verified under subjective tests.
Źródło:
Journal of Telecommunications and Information Technology; 2011, 3; 87-94
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
All metric bases and fault-tolerant metric dimension for square of grid
Autorzy:
Saha, Laxman
Basak, Mithun
Tiwary, Kalishankar
Powiązania:
https://bibliotekanauki.pl/articles/2048644.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
code
resolving set
metric dimension
fault-tolerant resolving set
fault-tolerant metric dimension
Opis:
For a simple connected graph G = (V,E) and an ordered subset W = {w1, w2, . . . , wk} of V , the code of a vertex v ∈ V , denoted by code(v), with respect to W is a k-tuple (d(v, w1), . . . , d(v, wk)), where d(v, wt) represents the distance between v and wt. The set W is called a resolving set of G if code(u) ≠ code(v) for every pair of distinct vertices u and v. A metric basis of G is a resolving set with the minimum cardinality. The metric dimension of G is the cardinality of a metric basis and is denoted by β(G). A set F ⊂ V is called fault-tolerant resolving set of G if F \ {v} is a resolving set of G for every v ∈ F. The fault-tolerant metric dimension of G is the cardinality of a minimal fault-tolerant resolving set. In this article, a complete characterization of metric bases for G2 mn has been given. In addition, we prove that the fault-tolerant metric dimension of G2 mn is 4 if m + n is even. We also show that the fault-tolerant metric dimension of G2 mn is at least 5 and at most 6 when m + n is odd.
Źródło:
Opuscula Mathematica; 2022, 42, 1; 93-111
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anima, Spiritus, Mens in Sepulchral Inscriptions from the Carmina Latina Epigraphica. Philological Approximations
Autorzy:
Gacia, Tadeusz
Powiązania:
https://bibliotekanauki.pl/articles/2158382.pdf
Data publikacji:
2022-09-26
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II
Tematy:
carmina epigraphica
metric sepulchral inscriptions,
anima
spiritus
mens
corpus
caro
metric sepulchral inscriptions
Opis:
The subject of this study is the meaning of the words anima, spiritus and mens in the metrical sepulchral inscriptions in the Carmina Latina Epigraphica collection published at the end of the 19th century by Franz Buecheler. This collection comprises almost 1,900 texts, of which around 1,400 are funerary and, particularly, sepulchral inscriptions. This article consists of three sections. The first contains general comments on Roman sepulchral inscriptions. The second, and most important part uses a conventional philological method to analyze the words in the source texts that denote the immaterial aspect of the human being that continues after death. The analysis of the texts reveals that the word anima occurs about 80 times, spiritus – 20, and mens only three times. These three words stand for what is usually expressed by the word “soul,” that is, the spiritual, immaterial aspect of the human being. Conclusions are presented gradually as the analytical compilation proceeds. Firstly, there is no semantic difference between anima and spiritus; although the word animus which is close to the three words discussed in this paper does not occur in this sense in the inscriptions. Secondly, both pagan and Christian inscriptions emphasize the dichotomy between anima or spiritus and corpus or caro (alternatively membra); some Christian inscriptions, pointing to this dichotomy, express belief in the resurrection. Thirdly, despite the difference in beliefs, Roman worshipers and Christians used very similar patterns of statements about the posthumous fate of the soul, for example, astra tenent animam, astra fovent animam, anima migravit ad astra or spiritus astra tenet, spiritus petit ad astra, mens caeli perget ad astra, which means that the Christian funerary language did not develop its distinct terminology for several centuries. The third section is a very brief summary of the study carried out.
Źródło:
Verbum Vitae; 2022, 40, 3; 675-690
1644-8561
2451-280X
Pojawia się w:
Verbum Vitae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
O ilości nierównoważnych metryk
On non-equivalent metrics on a uncountable set
Autorzy:
Zieliński, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/1791034.pdf
Data publikacji:
2018-06-01
Wydawca:
Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
Tematy:
nonequivalent metrics
metrizability
metric spaces
Opis:
It is well known that there exist many metrics on a non-emptyset. In the case of $(X, \varrho)$ − a finite metric set, it can be easily shown that all the metrics on X are equivalent. This paper examines the number of non-equivalent metrics on uncountably infinite sets.
Źródło:
Annales Universitatis Paedagogicae Cracoviensis. Studia ad Didacticam Mathematicae Pertinentia; 2017, 9; 139-152
2080-9751
2450-341X
Pojawia się w:
Annales Universitatis Paedagogicae Cracoviensis. Studia ad Didacticam Mathematicae Pertinentia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tree-based control space structures for discrete metric sources in 3D meshing
Autorzy:
Głut, Barbara
Jurczyk, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/305686.pdf
Data publikacji:
2019
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
control space
kd-trees
octree
anisotropic metric
mesh generation and adaptation
discrete metric sources
Opis:
This article compares the different variations of the octree and kd-tree structures used to create a control space based on a set of discrete metric point-sources. The control space thus created supervises the generation of the mesh providing efficient access to the required information on the desired shape and size of the mesh elements at each point of the discretized domain. Structures are compared in terms of computational and memory complexity as well as regarding the accuracy of the approximation of the set of discrete metric sources in the created control space structure.
Źródło:
Computer Science; 2019, 20 (4); 493-509
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On regularity estimates for mappings between embedded manifolds
Autorzy:
Ioffe, A.
Powiązania:
https://bibliotekanauki.pl/articles/970258.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
metric regularity
slope
locally coherent space
Opis:
We describe a class of metric spaces such that for set-valued mappings into such spaces it is possible to give a precise expression of regularity moduli in terms of slopes of DeGiorgi-Marino-Tosques. We also show that smooth manifolds in Banach spaces endowed with the induced metric belong to this class.
Źródło:
Control and Cybernetics; 2007, 36, 3; 659-668
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Statystyka w archeologii, czyli dlaczego nie trzeba bać się liczb
Statistics in archaeology. So why shouldn’t you be afraid of numbers?
Autorzy:
Rajpold, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/2053542.pdf
Data publikacji:
2022-06-03
Wydawca:
Uniwersytet Rzeszowski. Instytut Archeologii Uniwersytetu Rzeszowskiego. Muzeum Okręgowe w Rzeszowie
Tematy:
statistical analysis
archaeology
mathematics
metric data
Opis:
The great motorway research and construction investments have brought and are still bringing a huge set of new data. In 2019 alone, one million new archaeological artefacts were sourced. Therefore, there is a problem of systematic and comprehensive development of the obtained sources, in which statistics may be helpful. The article introduces selected statistical methods and shows examples of their use. It focuses on their usefulness in archaeological research, and thus it may become a boost for their wider use in the development of archaeological sources.
Źródło:
Materiały i Sprawozdania Rzeszowskiego Ośrodka Archeologicznego; 2021, 42; 113-139
0137-5725
Pojawia się w:
Materiały i Sprawozdania Rzeszowskiego Ośrodka Archeologicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The metric dimension of circulant graphs and their Cartesian products
Autorzy:
Chau, K.
Gosselin, S.
Powiązania:
https://bibliotekanauki.pl/articles/255804.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
metric dimension
circulant graph
Cartesian product
Opis:
Let G = (V, E) be a connected graph (or hypergraph) and let d(x,y) denote the distance between vertices x,y ∈V(G). A subset W ⊆V(G) is called a resolving set for G if for every pair ol distinct vertices x, y ∈ (G), there is w ∈W such that d(x,w) ≠d(y,w). The minimum cardinality of a resolving set for G is called the metric dimension of G, denoted by β (G). The circulant graph Cn(l, 2,... , t) has vertex set {v0, v1 …, vn-1} and edges [formula] where 0 ≤ i ≤ n — 1 and 1 ≤j ≤ t and the indices are taken modulo [formula]. In this paper we determine the exact metric dimension olthe circulant graphs Cn(l, 2,... , t). extending previous results due to Borchert and Gosselin (2013), Grigorious et al. (2014), and Vetrik (2016). In particular, we show that [formula] for large enough n, which implies that the metric dimension ol these circulants is completely determined by the congruence class ol n modulo 2t. We determine the exact value of β Cn (l, 2,.. . , i)) for n ≡ 2 mod 2t and n =≡ (t + 1) mod 2t and we give better bounds on the metric dimension ol these circulants for n ≡ 0 mod 2t and n ≡ 1 mod 2t. In addition, we bound the metric dimension ol Cartesian products ol circulant graphs.
Źródło:
Opuscula Mathematica; 2017, 37, 4; 509-534
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Minimality in asymmetry classes
Autorzy:
Wiernowolski, Michał
Powiązania:
https://bibliotekanauki.pl/articles/1219818.pdf
Data publikacji:
1997
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
convex sets
symmetry
minimality
Hausdorff metric
Opis:
We examine minimality in asymmetry classes of convex compact sets with respect to inclusion. We prove that each class has a minimal element. Moreover, we show there is a connection between asymmetry classes and the Rådström-Hörmander lattice. This is used to present an alternative solution to the problem of minimality posed by G. Ewald and G. C. Shephard in [4].
Źródło:
Studia Mathematica; 1997, 124, 2; 149-154
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cartan connection of transversally Finsler foliation
Autorzy:
Miernowski, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/747272.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
Finsler metric
normal bundle
Cartan connection
Opis:
The purpose of this paper is to define transversal Cartan connectionof Finsler foliation and to prove its existence and uniqueness.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio A – Mathematica; 2012, 66, 1
0365-1029
2083-7402
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio A – Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Weak Total Resolvability In Graphs
Autorzy:
Casel, Katrin
Estrada-Moreno, Alejandro
Fernau, Henning
Rodríguez-Velázquez, Juan Alberto
Powiązania:
https://bibliotekanauki.pl/articles/31341108.pdf
Data publikacji:
2016-02-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
metric dimension
resolving set
weak total metric dimension
weak total resolving set
adjacency dimension
graph operations
Opis:
A vertex v ∈ V (G) is said to distinguish two vertices x, y ∈ V (G) of a graph G if the distance from v to x is di erent from the distance from v to y. A set W ⊆ V (G) is a total resolving set for a graph G if for every pair of vertices x, y ∈ V (G), there exists some vertex w ∈ W − {x, y} which distinguishes x and y, while W is a weak total resolving set if for every x ∈ V (G)−W and y ∈ W, there exists some w ∈ W −{y} which distinguishes x and y. A weak total resolving set of minimum cardinality is called a weak total metric basis of G and its cardinality the weak total metric dimension of G. Our main contributions are the following ones: (a) Graphs with small and large weak total metric bases are characterised. (b) We explore the (tight) relation to independent 2-domination. (c) We introduce a new graph parameter, called weak total adjacency dimension and present results that are analogous to those presented for weak total dimension. (d) For trees, we derive a characterisation of the weak total (adjacency) metric dimension. Also, exact figures for our parameters are presented for (generalised) fans and wheels. (e) We show that for Cartesian product graphs, the weak total (adjacency) metric dimension is usually pretty small. (f) The weak total (adjacency) dimension is studied for lexicographic products of graphs.
Źródło:
Discussiones Mathematicae Graph Theory; 2016, 36, 1; 185-210
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Minkowskis metric in measuring changes of concentration of value added in agriculture, forestry, fishing and hunting sectors
Zastosowanie metryki Minkowskiego do pomiaru zmian koncentracji wartości dodanej w sektorach rolnictwa, leśnictwa, łowiectwa i rybactwa
Autorzy:
Binderman, Z.
Borkowski, B.
Szczesny, W.
Powiązania:
https://bibliotekanauki.pl/articles/37789.pdf
Data publikacji:
2015
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
Minkowski metric system
Minkowski tensor zob.Minkowski metric system
concentration coefficient
added value
agriculture
forestry
fishing
hunting
Opis:
This work is a direct continuation of a previous work by the authors that dealt with construction of new coeffi cients of concentration by using Minkowski’s metric ρp(1 ≤ p ≤ ∞). The following work gives examples of applications of those metrics in agriculture, forestry, fi shing and hunting sectors. It also studies the pattern of changes of concentration of added value created in those sectors by comparisons with other sectors.
Praca jest bezpośrednią kontynuacją pracy autorów dotyczącej konstrukcji nowych wskaźników koncentracji, przy użyciu metryki Minkowskiego ρp (1 ≤ p ≤ ∞). W niniejszym artykule podano zastosowanie tych wskaźników w sektorze rolnictwa, leśnictwa, łowiectwa i rybactwa. Zbadano jak przebiegają zmiany koncentracji wartości dodanej wypracowanej w tym sektorze, dokonując porównań z innymi sektorami.
Źródło:
Acta Scientiarum Polonorum. Oeconomia; 2015, 14, 1
1644-0757
Pojawia się w:
Acta Scientiarum Polonorum. Oeconomia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Trichodina pediculus Ehrenberg, 1838 in roach Rutilus rutilus [L.], metric and meristic data
CHARAKTERYSTYKA MORFOMETRYCZNA I MERYSTYCZNA TRICHODINA PEDICULUS EHRENBERG, 1838 Z PLOCI, RUTILUS RUTILUS (L.)
Autorzy:
Bielecki, A.
Dzika, E.
Powiązania:
https://bibliotekanauki.pl/articles/2148100.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
Lake Dgal Wielki
parasite
Rutilus rutilus
meristic measurement
meristic data
metric measurement
Trichodina pediculus
roach
metric data
Opis:
During the parasitological studies in Dgał Wielki Lake 32 specimens of Trichodina pediculus were collected from roaches (Rutilus rutilus). T. pediculus were subjected to the metric and meristic measurements. High correlation factors significance was obtained between the following data: body diameter and adhesive disc diameter with border membrane, adhesive disc diameter without border membrane, denticulate ring diameter, height of denticle. However no correlation significance between body diameter and number of denticles was found.
Źródło:
Wiadomości Parazytologiczne; 2001, 47, 3; 285-290
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On normal numbers mod $2$
Autorzy:
Ahn, Youngho
Choe, Geon
Powiązania:
https://bibliotekanauki.pl/articles/1396059.pdf
Data publikacji:
1998
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
coboundary
metric density
normal number
uniform distribution
Opis:
It is proved that a real-valued function $f(x)=\exp(\pi i \chi_I(x))$, where I is an interval contained in [0,1), is not of the form $f(x)=\overline{q(2x)}q(x)$ with |q(x)|=1 a.e. if I has dyadic endpoints. A relation of this result to the uniform distribution mod 2 is also shown.
Źródło:
Colloquium Mathematicum; 1998, 76, 2; 161-170
0010-1354
Pojawia się w:
Colloquium Mathematicum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Routing base congestion control metrics in manets
Autorzy:
Dalal, S.
Ruhil, R
Powiązania:
https://bibliotekanauki.pl/articles/103396.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
congestion
manets
metric
RFR
fuzzy logic
survey
Opis:
Mobile adhoc network is self-configurable and adaptive. Due to node mobility we cannot predict load on the network which leads to congestion, one of the widely researched area in manets. A lot of congestion control techniques and metrics have been proposed to overcome it before its occurrence or after it has occurred. In this survey we identify the currently used congestion control metrics. Through this survey we also propose a congestion control metric RFR(resource free ratio) which considers three most important parameters to provide congestion free route discovery. Further we show the results of node selection based on fuzzy logic calculations using the proposed metric.
Źródło:
Advances in Science and Technology. Research Journal; 2014, 8, 23; 33-40
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Maximal buttonings of trees
Autorzy:
Short, Ian
Powiązania:
https://bibliotekanauki.pl/articles/31232001.pdf
Data publikacji:
2014-05-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
centroid
graph metric
tree
walk
Wiener distance
Opis:
A buttoning of a tree that has vertices $v_1, v_2, . . ., v_n$ is a closed walk that starts at $v_1$ and travels along the shortest path in the tree to $v_2$, and then along the shortest path to $v_3$, and so forth, finishing with the shortest path from $v_n$ to $v_1$. Inspired by a problem about buttoning a shirt inefficiently, we determine the maximum length of buttonings of trees.
Źródło:
Discussiones Mathematicae Graph Theory; 2014, 34, 2; 415-420
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the Metric Dimension of Directed and Undirected Circulant Graphs
Autorzy:
Vetrík, Tomáš
Powiązania:
https://bibliotekanauki.pl/articles/31870010.pdf
Data publikacji:
2020-02-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
metric dimension
resolving set
circulant graph
distance
Opis:
The undirected circulant graph $C_n(±1, ±2, . . ., ±t)$ consists of vertices $v_0, v_1, . . ., v_{n−1}$ and undirected edges $v_iv_{i+j}$, where $0 ≤ i ≤ n − 1, 1 ≤ j ≤ t (2 ≤ t ≤ \frac{n}{2})$, and the directed circulant graph $C_n(1, t)$ consists of vertices $v_0, v_1, . . ., v_{n−1}$ and directed edges $v_iv_{i+1}, v_iv_{i+t}$, where $0 ≤ i ≤ n − 1 (2 ≤ t ≤ n−1)$, the indices are taken modulo $n$. Results on the metric dimension of undirected circulant graphs $C_n(±1, ±t)$ are available only for special values of $t$. We give a complete solution of this problem for directed graphs $C_n(1, t)$ for every $t ≥ 2$ if $n ≥ 2t^2$. Grigorious et al. [On the metric dimension of circulant and Harary graphs, Appl. Math. Comput. 248 (2014) 47–54] presented a conjecture saying that dim $(C_n(±1, ±2, . . ., ±t)) = t + p − 1$ for $n = 2tk + t + p$, where $3 ≤ p ≤ t + 1$. We disprove it by showing that dim $(C_n(±1, ±2, . . ., ±t)) ≤ t + \frac{p+1}{2}$ for $n = 2tk + t + p$, where $t ≥ 4$ is even, $p$ is odd, $1 ≤ p ≤ t + 1$ and $k ≥ 1$.
Źródło:
Discussiones Mathematicae Graph Theory; 2020, 40, 1; 67-76
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Trichodina pediculus Ehrenberg, 1838 in roach Rutilus rutilus [L.], metric and meristic data
Autorzy:
Bielecki, A
Dzika, E.
Powiązania:
https://bibliotekanauki.pl/articles/837145.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
Lake Dgal Wielki
parasite
Rutilus rutilus
meristic measurement
meristic data
metric measurement
Trichodina pediculus
roach
metric data
Opis:
During the parasitological studies in Dgał Wielki Lake 32 specimens of Trichodina pediculus were collected from roaches (Rutilus rutilus). T. pediculus were subjected to the metric and meristic measurements. High correlation factors significance was obtained between the following data: body diameter and adhesive disc diameter with border membrane, adhesive disc diameter without border membrane, denticulate ring diameter, height of denticle. However no correlation significance between body diameter and number of denticles was found.
Źródło:
Annals of Parasitology; 2001, 47, 3
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stopy metryczne jako jednostki kształtujące przebieg utworu fortepianowego
Metric Feet as Units Shaping the Course of a Piano Piece
Autorzy:
Knapiński, Karol
Powiązania:
https://bibliotekanauki.pl/articles/21379381.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Jagielloński. Koło Naukowe Studentów Muzykologii UJ
Tematy:
cognitivism
music
metric feet
perception of music
Opis:
In this paper, I make an attempt to present the analytical possibilities offered by using metric feet as units that shape the course of a (piano) piece. This approach results from cognitive studies that clearly show that the perception of auditory events is based on grouping them into larger units on the basic strong–weak axis. In this approach, the foot is a scheme of one strong sound and one or two weak sounds (in different combinations) that repeats regularly in the course of the work. In this article, I present the most common ways of distinguishing strong sounds: using duration, dynamics, and pitch (features derived analogously from language, distinguishing strong syllables from the speech stream) and characterising the most common feet.
Źródło:
Kwartalnik Młodych Muzykologów UJ; 2022, 4(55); 5-37
2956-4107
2353-7094
Pojawia się w:
Kwartalnik Młodych Muzykologów UJ
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
How to get rid of one of the weights in a two-weight Poincaré inequality?
Autorzy:
Franchi, Bruno
Hajłasz, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/1207966.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
weights
doubling measures
metric spaces
Poincaré inequality
Opis:
We prove that if a Poincaré inequality with two different weights holds on every ball, then a Poincaré inequality with the same weight on both sides holds as well.
Źródło:
Annales Polonici Mathematici; 2000, 74, 1; 97-103
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the continuity of the integrable multifunctions
Autorzy:
Piątek, B.
Powiązania:
https://bibliotekanauki.pl/articles/255295.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
multifunctions
Riemann integral
Aumann integral
Hausdorff metric
Opis:
The generalization of the Polovinkin theorem is studied.
Źródło:
Opuscula Mathematica; 2009, 29, 1; 81-88
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Semigroup of Contractions of Wreath Products of Metric Spaces
Autorzy:
Oliynyk, Bogdana
Powiązania:
https://bibliotekanauki.pl/articles/729049.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
metric space
wreath product
semigroup of contractions
Opis:
In this paper semigroups of contractions of metric spaces are considered. The semigroup of contractions of the wreath product of metric spaces is calculated.
Źródło:
Discussiones Mathematicae - General Algebra and Applications; 2010, 30, 1; 35-43
1509-9415
Pojawia się w:
Discussiones Mathematicae - General Algebra and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie opinii polskich pracodawców o umiejętnościach absolwentów szkół wyższych z wykorzystaniem technik wizualizacyjnych
Evaluation of Polish employers’ opinions about the competences of higher education graduates with the use of visualization techniques
Autorzy:
Grześkowiak, Alicja
Powiązania:
https://bibliotekanauki.pl/articles/425195.pdf
Data publikacji:
2015
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
competences
graduates of universities
non-metric data visualization
Opis:
The main objective of this article is to present the patterns of Polish employers’ perception of competences of higher education graduates in the context of labor market needs. The analyzes are carried out on the basis of survey data collected and made available by the Flash Eurobarometer. Since the set of variables under consideration contains only non-metric data, some selected visualization techniques (fluctuation diagrams, relative multiple barcharts) are applied to identify the regularities. Categorical principal components analysis and its graphical representation are used to analyze the interdependences among the considered competences. The results indicate that Polish employers evaluate the skills of the graduates rather positively, but they also recognize the competency gaps in various areas.
Źródło:
Econometrics. Ekonometria. Advances in Applied Data Analytics; 2015, 2 (48); 53-66
1507-3866
Pojawia się w:
Econometrics. Ekonometria. Advances in Applied Data Analytics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A note on generic chaos
Autorzy:
Liao, Gongfu
Powiązania:
https://bibliotekanauki.pl/articles/1311694.pdf
Data publikacji:
1994
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
metric space
dynamical system
topological mixing
generic chaos
Opis:
We consider dynamical systems on a separable metric space containing at least two points. It is proved that weak topological mixing implies generic chaos, but the converse is false. As an application, some results of Piórek are simply reproved.
Źródło:
Annales Polonici Mathematici; 1994, 59, 2; 99-105
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Does C* -embedding imply C*-embedding in the realm of products with a non-discrete metric factor?
Autorzy:
Gutev, Valentin
Ohta, Haruto
Powiązania:
https://bibliotekanauki.pl/articles/1205113.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
C-embedding
C*-embedding
product space
metric space
Opis:
The above question was raised by Teodor Przymusiński in May, 1983, in an unpublished manuscript of his. Later on, it was recognized by Takao Hoshina as a question that is of fundamental importance in the theory of rectangular normality. The present paper provides a complete affirmative solution. The technique developed for the purpose allows one to answer also another question of Przymusiński's.
Źródło:
Fundamenta Mathematicae; 2000, 163, 3; 241-265
0016-2736
Pojawia się w:
Fundamenta Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
Bayes robustness via the Kolmogorov metric
Autorzy:
Boratyńska, Agata
Zieliński, Ryszard
Powiązania:
https://bibliotekanauki.pl/articles/1340711.pdf
Data publikacji:
1993
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
stability of Bayes procedures
Bayes robustness
Kolmogorov metric
Opis:
An upper bound for the Kolmogorov distance between the posterior distributions in terms of that between the prior distributions is given. For some likelihood functions the inequality is sharp. Applications to assessing Bayes robustness are presented.
Źródło:
Applicationes Mathematicae; 1993-1995, 22, 1; 139-143
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Musielak−Orlicz−Sobolev spaces on arbitrary metrique space
Autorzy:
Youssef, Akdim
Aissaoui, Noureddine
Cherif Hassib, My
Powiązania:
https://bibliotekanauki.pl/articles/745903.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Metric measure space
Musielak−Orlicz−Sobolev spaces
capacity
Opis:
In this article we define Musielak−Orlicz−Sobolev spaces on arbitrary metric spaces with finite diameter and equipped with finite, positive Borel regular outer measure. We employ a Hajlasz definition, which uses a pointwise maximal inequality. We prove that these spaces are Banach, that the Poincaré inequality holds, and that the Lipschitz functions are dense. We develop a capacity theory based on these spaces. We study basic properties of capacity and several convergence results. As an application, we prove that each Musielak−Orlicz−Sobolev function has a quasi-continuous representative.
Źródło:
Commentationes Mathematicae; 2016, 56, 2
0373-8299
Pojawia się w:
Commentationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On unbounded almost periodic functions in~Hausdorff metric
Autorzy:
Stoiński, Stanisław
Powiązania:
https://bibliotekanauki.pl/articles/746740.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Hausdorff metric, almost periodic function, generalized trigonometric polynomial
Opis:
In this article we give the definition and some properties of unbounded almost periodic functions in Hausdorff metric. Moreover, we examine almost periodicity of the inverse of a generalized trigonometric polynomial of constant sign.
Źródło:
Commentationes Mathematicae; 2013, 53, 1
0373-8299
Pojawia się w:
Commentationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mixture of Metrics Optimization for Machine Learning Problems
Autorzy:
Wiercioch, Magdalena
Śmieja, Marek
Powiązania:
https://bibliotekanauki.pl/articles/1373676.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
metric learning
classification
clustering
chemical compound activity
fingerprint
Opis:
The selection of data representation and metric for a given data set is one of the most crucial problems in machine learning since it affects the results of classification and clustering methods. In this paper we investigate how to combine a various data representations and metrics into a single function which better reflects the relationships between data set elements than a single representation-metric pair. Our approach relies on optimizing a linear combination of selected distance measures with use of least square approximation. The application of our method for classification and clustering of chemical compounds seems to increase the accuracy of these methods.
Źródło:
Schedae Informaticae; 2015, 24; 83-92
0860-0295
2083-8476
Pojawia się w:
Schedae Informaticae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Б. Шульц в переводах И. Клеха, Г. Комского, А. Эппеля, Л. Цивьяна: польский орнаментализм в зеркале русской традиции
B. SCHULZ IN TRANSLATIONS BY I. KLEKH, G. KOMSKIJ, A. EPPEL’, L. TSIVYAN: POLISH ORNAMENTALISM IN THE MIRROR OF RUSSIAN TRADITION
Autorzy:
Преображенский, Сергей
Powiązania:
https://bibliotekanauki.pl/articles/444989.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
B. Schulz
metric prose
ornamentalism
translation
Russian tradition
Opis:
Russian tradition treats ornamental prose as a kind of prose employing additional semantic and rhythmical codes. B. Schulz’s works correspond to this definition, although signals of the secondary coding are not always correlated to their Russian equivalents (both rhythmical formulas and devices of narration). The chosen translation strategies are determined by the translator’s proximity to the aesthetics of Russian ornamentalism and the tradition of Russian ornamental prose.
Źródło:
Acta Neophilologica; 2016, XVIII/2; 179-185
1509-1619
Pojawia się w:
Acta Neophilologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On weighted Bergman kernels of bounded domains
Autorzy:
Dragomir, Sorin
Powiązania:
https://bibliotekanauki.pl/articles/1291172.pdf
Data publikacji:
1994
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
admissible weight
a-Bergman kernel
a-Bergman metric
Opis:
We build on work by Z. Pasternak-Winiarski [PW2], and study a-Bergman kernels of bounded domains $Ω ⊂ ℂ^N$ for admissible weights $a ∈ L¹(Ω)$.
Źródło:
Studia Mathematica; 1994, 108, 2; 149-157
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Desconstrução e as Geometrias Métricas
Autorzy:
Borges de Meneses, Ramiro Délio
Powiązania:
https://bibliotekanauki.pl/articles/2158833.pdf
Data publikacji:
2016
Wydawca:
Instytut Studiów Międzynarodowych i Edukacji Humanum
Tematy:
Geometry
Metric
Projective
Descriptive
philosophical foundations
and deconstructions
Opis:
Geometry is the branch of mathematics that studies the spatial forms, structures, relationships and operational properties. But there are varying degrees of space because of the extensions of analysis: Euclidean space, non-Euclidean, Hilbert space, and differential topological spaces. As the topology requires the operation of “passage to the limit”, hence one can derive that the formal elements borrowed Mathematical Analysis and Operating (functions, variables, etc.). According to Geometry, there are a very important deconstructions.
Źródło:
Prosopon. Europejskie Studia Społeczno-Humanistyczne; 2016, 1(14); 5-20
1730-0266
Pojawia się w:
Prosopon. Europejskie Studia Społeczno-Humanistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
Hyperconvexity of ℝ-trees
Autorzy:
Kirk, W.
Powiązania:
https://bibliotekanauki.pl/articles/1205371.pdf
Data publikacji:
1998
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
hyperconvex metric space
ℝ-tree
fixed point
nonexpansive mapping
Opis:
It is shown that for a metric space (M,d) the following are equivalent: (i) M is a complete ℝ-tree; (ii) M is hyperconvex and has unique metric segments.
Źródło:
Fundamenta Mathematicae; 1998, 156, 1; 67-72
0016-2736
Pojawia się w:
Fundamenta Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the strong metric subregularity in mathematical programming
Autorzy:
Osmolovskii, Nikolai P.
Veliov, Vladimir M.
Powiązania:
https://bibliotekanauki.pl/articles/2183475.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
optimization
mathematical programming
Karush-Kuhn-Tucker conditions
metric regularity
Opis:
This note presents sufficient conditions for the property of strong metric subregularity (SMSr) of the system of first order optimality conditions for a mathematical programming problem in a Banach space (the Karush-Kuhn-Tucker conditions). The constraints of the problem consist of equations in a Banach space setting and a finite number of inequalities. The conditions, under which SMSr is proven, assume that the data are twice continuously Fréchet differentiable, the strict Mangasarian-Fromovitz constraint qualification is satisfied, and the second-order sufficient optimality condition holds. The obtained result extends the one known for finite-dimensional problems. Although the applicability of the result is limited to the Banach space setting (due to the twice Fréchet differentiability assumptions and the finite number of inequality constraints), the paper can be valuable due to the self-contained exposition, and provides a ground for extensions. One possible extension was recently implemented in Osmolovskii and Veliov (2021).
Źródło:
Control and Cybernetics; 2021, 50, 4; 457--471
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Method for determining the focal length in a digital non-metric camera
Autorzy:
Hlotov, V.
Hunina, A.
Yurkiv, M.
Powiązania:
https://bibliotekanauki.pl/articles/100700.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie
Tematy:
focal length
digital non-metric camera
ogniskowa
kamera cyfrowa
Opis:
The authors analysed the methods for determining the focal length in digital cameras (DC) and proposed a method, according to which the control-measuring grid (CMG) is located vertically at a distance from the DC and a photograph of the CMG is made, then the latter (the CMG) is moved along the optical axis of the digital camera to the distance, which is fixed with a micrometre screw and, repeatedly, a series of photographs of the CMG is taken. After that, on the received digital images, the coordinates are measured on the corresponding intersections of the CMG, and subsequently, the focal length for the DC is determined. The a priori estimation of accuracy of determining the focal length for the DC by the proposed method is calculated. For approbation of the method, the focal length in the following cameras was determined: Canon EOS 350D, Canon EOS 450D, Canon EOS 5D.
Źródło:
Geomatics, Landmanagement and Landscape; 2017, 3; 71-81
2300-1496
Pojawia się w:
Geomatics, Landmanagement and Landscape
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
If it looks and smells like the reals...
Autorzy:
Tall, Franklin
Powiązania:
https://bibliotekanauki.pl/articles/1205122.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
elementary submodel
real line
locally compact separable metric space
Opis:
Given a topological space ⟨X,T⟩ ∈ M, an elementary submodel of set theory, we define $X_M$ to be X ∩ M with topology generated by {U ∩ M:U ∈ T ∩ M}. We prove that if $X_M$ is homeomorphic to ℝ, then $X = X_M$. The same holds for arbitrary locally compact uncountable separable metric spaces, but is independent of ZFC if "local compactness" is omitted.
Źródło:
Fundamenta Mathematicae; 2000, 163, 1; 1-11
0016-2736
Pojawia się w:
Fundamenta Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variational formulation for incompressible Euler flow / shape-morphing metric and geodesic
Autorzy:
Zolesio, J. P.
Powiązania:
https://bibliotekanauki.pl/articles/970740.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
Sobolev perimeter
Euler flow
morphic metric
geodesic
topological change
Opis:
Shape variational formulation for Euler flow has already been considered by the author in (1999a, 2007c). We develop here the control approach considering the convection (or mass transport) as the "state equation" while the speed vector field is the control and we introduce the h-Sobolev curvature which turns to be shape differentiable. The value function defines a new shape metric; we derive existence of geodesic for a p-pseudo metric, verifying the triangle property with a factor 2p-1, for any p > 1. Any geodesic solves the Euler equation for incompressible fluids and, in dimension 3, is not curl free. The classical Euler equation for incompressible fluid (3), coupled with the convection (1) turns to have variational solutions when conditions are imposed on the convected tube ζ while no initial condition has to be imposed on the fluid speed V itself.
Źródło:
Control and Cybernetics; 2009, 38, 4B; 1631-1653
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A method based on fuzzy system for assessing the reliability of software based aspects
Autorzy:
Zavvar, M
Ramezani, F
Powiązania:
https://bibliotekanauki.pl/articles/957953.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
measure
metric
fuzzy logic
reliability
aspect oriented software development
Opis:
In fact, reliability as the qualities metric is the probability success or the probability that a system or a set of tasks will work without failure for a specified constraints of time and space, as specified in the design and operating conditions specified temperature, humidity, vibration and action. A relatively new methodologies for developing complex software systems engineering is an aspect oriented software systems, that provides the new methods for the separation of concerns multiple module configuration or intervention and automatic integration them with a system. In this paper, a method using fuzzy logic to measure software reliability based on the above aspects is presented. The proposed approach regarding the use of appropriate metrics and low errors in the estimation of reliability has a better performance than other methods.
Źródło:
Advances in Science and Technology. Research Journal; 2015, 9, 27; 143-148
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Operator fractional-linear transformations: convexity and compactness of image; applications
Autorzy:
Khatskevich, V.
Shul'Man, V.
Powiązania:
https://bibliotekanauki.pl/articles/1388601.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
Hilbert space
fractional-linear transformation
evolution operator
indefinite metric
Opis:
The present paper consists of two parts. In Section 1 we consider fractional-linear transformations (f.-l.t. for brevity) F in the space $ℒ(X_1,X_2)$ of all linear bounded operators acting from $X_1$ into $X_2$, where $X_1, X_2$ are Banach spaces. We show that in the case of Hilbert spaces $X_1, X_2$ the image F(ℬ) of any (open or closed) ball ℬ ⊂ D(F) is convex, and if ℬ is closed, then F(ℬ) is compact in the weak operator topology (w.o.t.) (Theorem 1.2). These results extend the corresponding results on compactness obtained in [3], [4] under some additional restrictions imposed on F. We also establish that the convexity of the image of f.-l.t. is a characteristic property of Hilbert spaces, that is, if for the f.-l.t. $F:K → (I+K)^{-1}$ the image $F()$ of the open unit ball of the space ℒ(X) is convex, then X is a Hilbert space (Theorem 1.3). In Section 2 we apply the compactness of F(̅) for the closed unit operator ball ̅ to the study of the behavior of solutions to evolution problems in a Hilbert space ℋ. Namely, we establish the exponential dichotomy of solutions for the so-called hyperbolic case (such that the evolution operator is invertible). This is an extension of Theorem 1.1 of [5], where the corresponding assertion was established for the particular case of a Pontryagin space ℋ.
Źródło:
Studia Mathematica; 1995, 116, 2; 189-195
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The strong isometric dimension of finite reflexive graphs
Autorzy:
Fitzpatrick, Shannon
Nowakowski, Richard
Powiązania:
https://bibliotekanauki.pl/articles/743675.pdf
Data publikacji:
2000
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
isometric
embedding
strong product
injective hull
paths
distance
metric
Opis:
The strong isometric dimension of a reflexive graph is related to its injective hull: both deal with embedding reflexive graphs in the strong product of paths. We give several upper and lower bounds for the strong isometric dimension of general graphs; the exact strong isometric dimension for cycles and hypercubes; and the isometric dimension for trees is found to within a factor of two.
Źródło:
Discussiones Mathematicae Graph Theory; 2000, 20, 1; 23-38
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preparation of control space for remeshing polygonal surfaces
Autorzy:
Jurczyk, T.
Głut, B.
Powiązania:
https://bibliotekanauki.pl/articles/305758.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
remeshing
anisotropic metric
control space
mesh adaptation
polygonal mesh
Opis:
The subject of the article concerns the issues of remeshing, transforming a polygonal mesh into a triangular mesh adapted to its surface. From the initial polygonal mesh, the curvature of surface and boundary is retrieved and used to calculate a metric tensor varying in three-dimensional space. In the proposed approach, the curvature is computed using local approximation of surfaces and curves on the basis of vertices of the polygonal mesh. An essential part of the presented remeshing procedure is a creation of a control space structure based on the retrieved discrete data. The subsequent process of remeshing is then supervised by the contents of this auxiliary structure. The article presents various aspects related to the procedure of initialization, creation, and adjustment of the control space structure.
Źródło:
Computer Science; 2013, 14 (4); 547-561
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluating four remote sensing based models to estimate latent heat flux in semi-arid climate for heterogeneous surface coverage of western Algeria
Autorzy:
Oualid, Tewfik A.
Hamimed, Abderahmane
Khaldi, Abdelkader
Powiązania:
https://bibliotekanauki.pl/articles/2174320.pdf
Data publikacji:
2022
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
Algeria
energy balance
evapotranspiration
Landsat
METRIC
SPARSE
TIM
TSEB
Opis:
Optimal estimation of water balance components at the local and regional scales is essential for many applications such as integrated water resources management, hydrogeological modelling and irrigation scheduling. Evapotranspiration is a very important component of the hydrological cycle at the soil surface, particularly in arid and semi-arid lands. Mapping evapotranspiration at high resolution with internalised calibration (METRIC), trapezoid interpolation model (TIM), two-source energy balance (TSEB), and soil-plant-atmosphere and remote sensing evapotranspiration (SPARSE) models were applied using Landsat 8 images for four dates during 2014-2015 and meteorological data. Surface energy maps were then generated. Latent heat flux estimated by four models was then compared and evaluated with those measured by applying the method of Bowen ratio for the various days. In warm periods with high water stress differences and with important surface temperature differences, METRIC proves to be the most robust with the root-mean-square error (RMSE) less than 40 W∙m-2. However, during the periods with no significant surface temperature and soil humidity differences, SPARSE model is superior with the RMSE of 35 W∙m-2. The results of TIM are close to METRIC, since both models are sensitive to the difference in surface temperature. However, SPARSE remains reliable with the RMSE of 55 W∙m-2 unlike TSEB, which has a large deviation from the other models. On the other hand, during the days when the temperature difference is small, SPARSE and TSEB are superior, with a clear advantage of SPARSE serial version, where temperature differences are less important.
Źródło:
Journal of Water and Land Development; 2022, 55; 259--275
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On uniform strict minima for vector-valued functions
Autorzy:
Bednarczuk, E. M.
Leśniewski, K.
Powiązania:
https://bibliotekanauki.pl/articles/206852.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
uniform strict minima
K-convex mappings
metric subregularity
domination property
Opis:
We introduce uniform strict minima for vector-valued functions and provide conditions for their Lipschitz continuity as functions of linear perturbations. We also investigate regularity propertiesof subdifferentialsfor cone convexvector-valuedfunctions.
Źródło:
Control and Cybernetics; 2015, 44, 2; 257-273
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Topological sensitivity analysis for elliptic problems on graphs
Autorzy:
Leugering, G.
Sokolowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/970307.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
differential equations on metric graphs
obstacles
topology optimization
asymptotic analysis
Opis:
We consider elliptic problems on graphs under given loads and bilateral contact conditions. We ask the question: which graph is best suited to sustain the loads and the constraints. More precisely, given a cost function we may look at a multiple node of the graph with edge degree q and ask as to whether that node should be resolved into a number of nodes of edge degree less than q, in order to decrease the cost. With this question in mind, we are looking into the sensitivity analysis of a graph carrying a second order elliptic equation with respect to changing its topology by releasing nodes with high edge degree or including an edge. With the machinery at hand developed here, we are in the position to define the topological gradient of an elliptic problem on a graph.
Źródło:
Control and Cybernetics; 2008, 37, 4; 971-997
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Benchmarking image codecs by assessment of coded test images: the development of test images and new objective quality metrics
Autorzy:
Punchihewa, A.
Bailey, D. G.
Hodgson, R. M.
Powiązania:
https://bibliotekanauki.pl/articles/309074.pdf
Data publikacji:
2006
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
image quality
artefacts
subjective
objective
coding
metric
blockiness
blur
ringing
Opis:
Objective quality measures are required for benchmarking codec performance. Our aim was to develop a simple, accurate method capable of rapidly measuring the degree of blockiness, edge-blur and ringing due to image compression. Two test images were designed to emphasise these artefacts. The efficacy of the new metrics is demonstrated using a JPEG codec at a range of compression levels.
Źródło:
Journal of Telecommunications and Information Technology; 2006, 1; 11-16
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nowe podejście w definiowaniu jednostek miar
Autorzy:
Ruśkowska, P.
Powiązania:
https://bibliotekanauki.pl/articles/1426046.pdf
Data publikacji:
2013
Wydawca:
Główny Urząd Miar
Tematy:
jednostki SI
system metryczny
redefinicja
SI units
metric system
redefinition
Opis:
Przeczytaj o pracach nad redefinicją jednostek układu SI, czyli przejściu od wzorców jako fizycznych obiektów do wzorców opartych na zjawiskach fizycznych i o tym, że dążenia te wzbudzają kontrowersje.
Źródło:
Metrologia i Probiernictwo : biuletyn Głównego Urzędu Miar; 2013, 1; 19-21
2300-8806
Pojawia się w:
Metrologia i Probiernictwo : biuletyn Głównego Urzędu Miar
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A method of determining inland vessel position using a single stationary, non-metric camera
Autorzy:
Kujawski, A.
Stępień, G.
Powiązania:
https://bibliotekanauki.pl/articles/135024.pdf
Data publikacji:
2017
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
inland shipping
projective transformation
image analysis
non-metric camera
UAV
Opis:
This article presents the results of research on determining inland vessel position using a single stationary, non-metric camera, which was positioned on the Długi Bridge in Szczecin. Studies included a comparison of graphical methods (i.e. geometric transformation and the bunch of rays method) and analytical methods (i.e. 2D to 2D transformation and 3D to 2D transformation). The research material was a collection of video images of an inland vessel navigating the West Odra River between the Długi and Kolejowy bridges in Szczecin. The results of the research were compared to reference points determined using tachymetric surveys and material acquired by an Unmanned Aerial Vehicle (UAV) and the onboard GNSS satellite receiver with Real Time Kinematic (RTK) correction.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2017, 52 (124); 103-111
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metric dimension of Andrasfai graphs
Autorzy:
Pejman, S. Batool
Payrovi, Shiroyeh
Behtoei, Ali
Powiązania:
https://bibliotekanauki.pl/articles/254963.pdf
Data publikacji:
2019
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
resolving set
metric dimension
Andrasfai graph
Cayley graph
Cartesian product
Opis:
A set W ⊆ V(G) is called a resolving set, if for each pair of distinct vertices u,v ∈ V(G) there exists t ∈ W such that d(u,t) ≠ d(v,t), where d(x,y) is the distance between vertices x and y. The cardinality of a minimum resolving set for G is called the metric dimension of G and is denoted by dimM(G). This parameter has many applications in different areas. The problem of finding metric dimension is NP-complete for general graphs but it is determined for trees and some other important families of graphs. In this paper, we determine the exact value of the metric dimension of Andrasfai graphs, their complements and [formula]. Also, we provide upper and lower bounds for [formula].
Źródło:
Opuscula Mathematica; 2019, 39, 3; 415-423
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal solutions of multivariate coupling problems
Autorzy:
Rüschendorf, Ludger
Powiązania:
https://bibliotekanauki.pl/articles/1340264.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
$l_p$-metric
c-convex functions
optimal couplings
transportation problem
Opis:
Some necessary and some sufficient conditions are established for the explicit construction and characterization of optimal solutions of multivariate transportation (coupling) problems. The proofs are based on ideas from duality theory and nonconvex optimization theory. Applications are given to multivariate optimal coupling problems w.r.t. minimal $l_p$-type metrics, where fairly explicit and complete characterizations of optimal transportation plans (couplings) are obtained. The results are of interest even in the one-dimensional case. For the first time an explicit criterion is given for the construction of optimal multivariate couplings for the Kantorovich metric $l_1$.
Źródło:
Applicationes Mathematicae; 1995-1996, 23, 3; 325-338
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of the classical variation coefficient with calculated with the ring method for survey BOST results
Autorzy:
Borkowski, S.
Noga, A.
Powiązania:
https://bibliotekanauki.pl/articles/111818.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
quality
stability
topological metric
jakość
stabilność
topologiczna metryka
metoda BOST
Opis:
This article presents two methods of the variation coefficient calculating: the classical method and the ring method. These methods were used to study the distribution of pairs of validity ratings on the map of stability for two factors: the stability of the process and the quality of the product. Coefficients of variation for each zone are dependent on the method of their calculation.
Źródło:
Production Engineering Archives; 2016, 11, 2; 22-25
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tree structures for adaptive control space in 3D meshing
Autorzy:
Jurczyk, T.
Głut, B.
Powiązania:
https://bibliotekanauki.pl/articles/305818.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
control space
Kd-tree
octree
anisotropic metric
mesh generation and adaptation
Opis:
The article presents a comparison of several octree- and kd-tree-based struc- tures used for the construction of control space in the process of anisotropic mesh generation and adaptation. The adaptive control space utilized by the authors supervises the construction of meshes by providing the required metric information regarding the desired shape and size of elements of the mesh at each point of the modeled domain. Comparative tests of these auxiliary struc- tures were carried out based on different versions of the tree structures with respect to computational and memory complexity as well as the quality of the generated mesh. Analysis of the results shows that kd-trees (not present in the meshing literature in this role) offer good performance and may become a reasonable alternative to octree structures.
Źródło:
Computer Science; 2016, 17 (4); 541-560
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On dynamically consistent Jacobian inverse for non-holonomic robotic systems
Autorzy:
Ratajczak, J.
Tchoń, K.
Powiązania:
https://bibliotekanauki.pl/articles/229326.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
non-holonomic system
motion
Jacobian inverse
dynamic consistency
metric
motion planning
Opis:
This paper presents the dynamically consistent Jacobian inverse for non-holonomic robotic system, and its application to solving the motion planning problem. The system’s kinematics are represented by a driftless control system, and defined in terms of its input-output map in accordance with the endogenous configuration space approach. The dynamically consistent Jacobian inverse (DCJI) has been introduced by means of a Riemannian metric in the endogenous configuration space, exploiting the reduced inertia matrix of the system’s dynamics. The consistency condition is formulated as the commutativity property of a diagram of maps. Singular configurations of DCJI are studied, and shown to coincide with the kinematic singularities. A parametric form of DCJI is derived, and used for solving example motion planning problems for the trident snake mobile robot. Some advantages in performance of DCJI in comparison to the Jacobian pseudoinverse are discovered.
Źródło:
Archives of Control Sciences; 2017, 27, 4; 555-573
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Generalized nonsingular model for compact stars electrically charged
Autorzy:
Malaver, Manuel
Powiązania:
https://bibliotekanauki.pl/articles/1157857.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Adjustable parameter
Einstein-Maxwell system
MIT Bag Model
anisotropy
metric functions
Opis:
We found new class of solutions to the Einstein-Maxwell system of equations for charged quark matter within the framework of MIT Bag Model considering a particular form for the measure of anisotropy and a metric function which depends on an adjustable parameter α. Variables as the energy density, charge density, radial pressure and the metric functions are written in terms of elementary and polynomial functions. We show that the form chosen for the metric function allows obtain physically acceptable solutions with any value of the adjustable parameter.
Źródło:
World Scientific News; 2018, 92, 2; 327-339
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena ortomozaik obrazów uzyskanych za pomocą bezzałogowego statku latającego do określania wybranych cech dendrometrycznych drzew w drzewostanach sosnowych
Evaluation of the ortho-mosaic obtained by unmanned aerial vehicle to determine selected dendrometric variables of trees in pine stands
Autorzy:
Stereńczak, K.
Będkowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/130513.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Geodetów Polskich
Tematy:
leśnictwo
zdjęcia niemetryczne
cechy taksacyjne
forestry
non-metric image
taxation traits
Opis:
Wielospektralne zdjęcia cyfrowe, uzyskane za pomocą niemetrycznych kamer cyfrowych przenoszonych przez bezzałogowy statek latający, wykorzystano do utworzenia ortomozaik o rozdzielczości przestrzennej 0.15 m. Na podstawie ortomozaik określono cechy dendrometryczne pojedynczych drzew sosny oraz położenie tych drzew w drzewostanie. W terenie zmierzono pierśnice drzew, tj. grubości pni na wysokości 1.3 m. oraz rozpiętość koron, tj. odległość między jej krawędziami na dwóch kierunkach - NS oraz EW, co pozwoliło na obliczenie pola powierzchni jej rzutu. Zasięgi tych samych koron zwektoryzowano na ortomozaikach oraz obliczono pola powierzchni. Sprawdzono siłę związku pomiędzy cechami pojedynczych drzew zmierzonymi w terenie oraz pomiędzy polem powierzchni rzutów poziomych koron, określonym na podstawie wyników uzyskanych w terenie, a polem obliczonym na podstawie wyników wektoryzacji na ortomozaice. W obydwu przypadkach uzyskano wysokie wartości wskaźnika determinacji R2. Ostatnim etapem analiz rzutów poziomych koron było porównanie wyników wektoryzacji z pomiarem pierśnicowego pola przekroju w terenie. Powierzchnia rzutu poziomego określona w wyniku wektoryzacji na ortomozaice była lepiej skorelowana z pierśnicowym polem przekroju drzew niż pole powierzchni określone na podstawie wyników pomiaru terenowego. Związki pomiędzy pierśnicą i wielkością korony zmierzoną w terenie oraz wielkością korony zmierzoną na ortomozaice mogą być przydatne w inwentaryzacji zapasu (miąższości drewna) szczególnie na powierzchniach poklęskowych. Uzyskane wyniki są zadowalające z punktu widzenia potrzeb wstępnego szacowania szkód powodowanych przez czynniki katastroficzne oraz inwentaryzacji przestrzeni leśnej, np. na potrzeby badań ekologicznych.
Multispectral images, acquired by digital non metric Sigma DP2 cameras, which were carried by Unmanned Aerial Vehicle - AVI-1 were used to produce orthoimages with 0.15 m ground resulution. Pictures were taken on 17 October 2011. Basing on them selected dendrometric characteristics of single scotch pine trees and their location were determined. Through field measurements both breast height diameters of tree's stems and crowns extends were established. These data were compared with crowns extends determined basing on crowns shapes digitized manually on orthoimages. Individual trees dendrometric characteristics were compared with crown width digitized on orthomozaic. Relationship between the characteristics of individual trees and crown segments obtained high values of determination up to R2=0,8. The results are satisfactory for forestry purposes in order to acquire accurate and fast information about wood volume. UAV images may be used to analyse effects of damage factors acting on small areas also.
Źródło:
Archiwum Fotogrametrii, Kartografii i Teledetekcji; 2012, 24; 345-355
2083-2214
2391-9477
Pojawia się w:
Archiwum Fotogrametrii, Kartografii i Teledetekcji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
More on the behaviors of fixed points sets of multifunction and applications
Autorzy:
Alleche, B.
Nachi, K.
Powiązania:
https://bibliotekanauki.pl/articles/952787.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
multifunction
fixed point
Pompeiu-Hausdorff metric
bounded proximal convergence
differential inclusion
Opis:
In this paper, we study the behaviors of fixed points sets of non necessarily pseudo-contractive multifunctions. Rather than comparing the images of the involved multifunctions, we make use of some conditions on the fixed points sets to establish general results on their stability and continuous dependence. We illustrate our results by applications to differential inclusions and give stability results of fixed points sets of non necessarily pseudo-contractive multifunctions with respect to the bounded proximal convergence.
Źródło:
Opuscula Mathematica; 2015, 35, 4; 427-443
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the existence of a fuzzy integral equation of Urysohn-Volterra type
Autorzy:
Darwish, Mohamed
Powiązania:
https://bibliotekanauki.pl/articles/729473.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
fuzzy integral equation
Urysohn-Volterra
Hausdorff metric
Schauder fixed point theorem
Opis:
We present an existence theorem for integral equations of Urysohn-Volterra type involving fuzzy set valued mappings. A fixed point theorem due to Schauder is the main tool in our analysis.
Źródło:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2008, 28, 1; 75-82
1509-9407
Pojawia się w:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
More on linear and metric tree maps
Autorzy:
Kozerenko, Sergiy
Powiązania:
https://bibliotekanauki.pl/articles/1397335.pdf
Data publikacji:
2021
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Markov graph
metric map
non-expanding map
linear map
graph homomorphism
Opis:
We consider linear and metric self-maps on vertex sets of finite combinatorial trees. Linear maps are maps which preserve intervals between pairs of vertices whereas metric maps are maps which do not increase distances between pairs of vertices. We obtain criteria for a given linear or a metric map to be a positive (negative) under some orientation of the edges in a tree, we characterize trees which admit maps with Markov graphs being paths and prove that the converse of any partial functional digraph is isomorphic to a Markov graph for some suitable map on a tree.
Źródło:
Opuscula Mathematica; 2021, 41, 1; 55-70
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Hanoi Graph $H_4^3$
Autorzy:
Hinz, Andreas M.
Movarraei, Nazanin
Powiązania:
https://bibliotekanauki.pl/articles/31348122.pdf
Data publikacji:
2020-11-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
Hanoi graphs
Sierpiński graphs
metric dimension
domination number
dominator chromatic number
Opis:
Metric properties of Hanoi graphs $H_p^n$ are not as well understood as those of the closely related, but structurally simpler Sierpiński graphs $S_p^p$. The most outstanding open problem is to find the domination number of Hanoi graphs. Here we concentrate on the first non-trivial case of $H_4^3$, which contains no 1-perfect code. The metric dimension and the dominator chromatic number of $H_4^3$ will be determined as well. This leads to various conjectures for the general case and will thus provide an orientation for future research.
Źródło:
Discussiones Mathematicae Graph Theory; 2020, 40, 4; 1095-1109
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
About the ways of defining connected sets in the topological spaces
Autorzy:
Domańska, K.
Wróbel, M.
Powiązania:
https://bibliotekanauki.pl/articles/122078.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
Tematy:
przestrzeń topologiczna
przestrzeń metryczna
topologia podprzestrzeni
topological space
metric space
subspace topology
Opis:
A topological space is called connected if it is not the union of two disjoint, nonempty and open sets in this space. The standard exercises show that here the concept of open sets can be replaced by closed sets or separated sets. In this context we will discuss the definition of connected sets in topological spaces, not being the whole space with particular regard to metric spaces, without the term of subspace topology.
Źródło:
Scientific Issues of Jan Długosz University in Częstochowa. Mathematics; 2016, 21; 11-16
2450-9302
Pojawia się w:
Scientific Issues of Jan Długosz University in Częstochowa. Mathematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some constructive applications of $Λ^{2}$-representations to integration of PDEs
Autorzy:
Popov, A.
Zadadaev, S.
Powiązania:
https://bibliotekanauki.pl/articles/1207978.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
discrete net
$Λ^{2}$-representations of PDEs
Lobachevsky (hyperbolic) geometry
pseudospherical metric
Opis:
Two new applications of $Λ^{2}$-representations of PDEs are presented: 1. Geometric algorithms for numerical integration of PDEs by constructing planimetric discrete nets on the Lobachevsky plane $Λ^{2}$. 2. Employing $Λ^{2}$-representations for the spectral-evolutionary problem for nonlinear PDEs within the inverse scattering problem method.
Źródło:
Annales Polonici Mathematici; 2000, 74, 1; 261-274
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of recording of long-series images taken from non-metric cameras on increasing the quality of modelling objects with their surroundings
Autorzy:
Jankowicz, B.
Powiązania:
https://bibliotekanauki.pl/articles/100540.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie
Tematy:
photographic recording of long-series images
non-metric cameras
3D modelling
Opis:
The diversity of methods used both by acquiring data images and later in the creation of a 3D model of an object, gives an opportunity to choose the best possible technique and processing method. It is not always necessary to use the most expensive solutions. In the terrain analysis and local landscape assessment the use of the modelling method, based on recording of series images taken by non-metric cameras, seems optimal, and is economically attractive.
Źródło:
Geomatics, Landmanagement and Landscape; 2015, 3; 77-90
2300-1496
Pojawia się w:
Geomatics, Landmanagement and Landscape
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Applying Machine Learning to Software Fault Prediction
Autorzy:
Wójcicki, B.
Dabrowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/384105.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
classifier
fault prediction
machine learning
metric
Naïve Bayes
Python
quality
software intelligence
Opis:
Introduction: Software engineering continuously suffers from inadequate software testing. The automated prediction of possibly faulty fragments of source code allows developers to focus development efforts on fault-prone fragments first. Fault prediction has been a topic of many studies concentrating on C/C++ and Java programs, with little focus on such programming languages as Python. Objectives: In this study the authors want to verify whether the type of approach used in former fault prediction studies can be applied to Python. More precisely, the primary objective is conducting preliminary research using simple methods that would support (or contradict) the expectation that predicting faults in Python programs is also feasible. The secondary objective is establishing grounds for more thorough future research and publications, provided promising results are obtained during the preliminary research. Methods: It has been demonstrated that using machine learning techniques, it is possible to predict faults for C/C++ and Java projects with recall 0.71 and false positive rate 0.25. A similar approach was applied in order to find out if promising results can be obtained for Python projects. The working hypothesis is that choosing Python as a programming language does not significantly alter those results. A preliminary study is conducted and a basic machine learning technique is applied to a few sample Python projects. If these efforts succeed, it will indicate that the selected approach is worth pursuing as it is possible to obtain for Python results similar to the ones obtained for C/C++ and Java. However, if these efforts fail, it will indicate that the selected approach was not appropriate for the selected group of Python projects. Results: The research demonstrates experimental evidence that fault-prediction methods similar to those developed for C/C++ and Java programs can be successfully applied to Python programs, achieving recall up to 0.64 with false positive rate 0.23 (mean recall 0.53 with false positive rate 0.24). This indicates that more thorough research in this area is worth conducting. Conclusion: Having obtained promising results using this simple approach, the authors conclude that the research on predicting faults in Python programs using machine learning techniques is worth conducting, natural ways to enhance the future research being: using more sophisticated machine learning techniques, using additional Python-specific features and extended data sets.
Źródło:
e-Informatica Software Engineering Journal; 2018, 12, 1; 199-216
1897-7979
Pojawia się w:
e-Informatica Software Engineering Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hausdorff convergence of domains and their boundaries for shape optimal design
Autorzy:
Holzleitner, L.
Powiązania:
https://bibliotekanauki.pl/articles/205525.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
hiperprzestrzeń
konwergencja Hausdorffa
miara Haudorffa
Hausdorff convergence
Hausdorff metric
hyperspace
shape optimization
Opis:
A question, which arises frequently in shape optimal design, is the convergence of domains. If the objective function is defined by using the solution of a PDE with boundary conditions, then also the convergence of the boundary is of importance. In this paper a criterion for a set of domains is defined, such that from [Omega_n] --> Omega follows [Gamma_n] --> Gamma if one is restricting to this set of domains. Moreover it is proved that this criterion is sharp, meaning that if [Omega_n] --> Omega implies [Gamma_n] --> Gamma holds for any sequence of this set, then this criterion has to be fulfilled. A similar criterion for the convergence of the Lebesgue measure of the boundaries my(Gamma_n) --> my(Gamma) is given.
Źródło:
Control and Cybernetics; 2001, 30, 1; 23-44
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Meilleures approximations dun élément du tore ² et géométrie de la suite des multiples de cet élément
Autorzy:
Chevallier, Nicolas
Powiązania:
https://bibliotekanauki.pl/articles/1390981.pdf
Data publikacji:
1996
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
best simultaneous diophantine approximation
continued fraction
metric theory
Voronoï diagram
Rokhlin tower
Źródło:
Acta Arithmetica; 1996-1997, 78, 1; 19-35
0065-1036
Pojawia się w:
Acta Arithmetica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Properties of set-valued stochastic integrals
Autorzy:
Motyl, Jerzy
Syga, Joachim
Powiązania:
https://bibliotekanauki.pl/articles/729672.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
decomposable set
Hausdorff metric
predictable set-valued process
square-integrable martingale
semimartingale
Opis:
We introduce set-valued stochastic integrals driven by a square-integrable martingale and by a semimartingale. We investigate properties of both integrals.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2006, 26, 1; 83-103
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphometric traits of selected heart veins of standard and mutational colour variants of American mink (Neovison vison)
Cechy morfometryczne wybranych żył serca standardowych i mutacyjnych odmian barwnych norki amerykańskiej (Neovison vison)
Autorzy:
Baranowski, P.
Żuk, K.
Powiązania:
https://bibliotekanauki.pl/articles/2622344.pdf
Data publikacji:
2020
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
American mink
Neovison vison
metric trait
cardiac vein
venous blood
colour variant
Źródło:
Acta Scientiarum Polonorum. Zootechnica; 2020, 19, 3; 53-62
1644-0714
Pojawia się w:
Acta Scientiarum Polonorum. Zootechnica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wykorzystanie metody asynchronicznego próbkowania z linią opóźniającą oraz metryki Hausdorffa do monitorowania systemów teletransmisji światłowodowej
Optical performance monitoring using the Asynchronous Delay Tap Sampling method with the Hausdorff metric
Autorzy:
Walewski, P.
Perlicki, K.
Siergiejczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/156863.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
światłowody
monitorowanie
metoda ADTS
metryka Hausdorffa
optical fiber
monitoring
ADTS method
Hausdorff metric
Opis:
W artykule przedstawiono metodę asynchronicznego próbkowania z liną opóźniającą ang. Asynchronous Delay Tap Sampling (ADTS) służącą do monitorowania jakości pracy systemów telekomunikacji światłowodowej. Przedstawiono analizę jednoczesnego wpływu zjawisk dyspersji chromatycznej i polaryzacyjnej oraz optycznego stosunku sygnału do szumu na wyniki metody ADTS. Do wyznaczania wartości liczbowych monitorowanych parametrów użyto metryki Hausdorff’a. Przy jednoczesnym wpływie wyżej wymienionych można monitorować dyspersję chromatyczną z błędem ±15 ps/nm, dyspersję polaryzacyjną z błędem ±1 ps oraz OSNR z błędem ±0,5 dB, co wykazały symulacje.
Nowadays the development of optical fiber networks makes the requirements for them even higher. Not only public networks but also the specific corporate networks are being developed. Therefore there is a great need for complex Optical Performance Monitoring (OPM) methods. In the first three sections we discuss the needs of corporate optical networks and the limitations of OPM techniques. Then we present an application of the Asynchronous Delay Tap Sampling (ADTS) method for Optical Performance Monitoring. The way of sampling (Fig. 1), representation of samples on a scatter plot (Fig. 2) and representation of the sampled bit sequences (Fig. 3) are explained. We discuss and present the simultaneous influence of chromatic dispersion (CD), polarization mode dispersion (PMD) and optical signal to noise ratio (OSNR) on ADTS method results (Fig. 4). The simulations of 10 Gbit/s, Non-Return-to-Zero and On-Off Keying signal were made using OptSim 4.0 software. Hausdorff metric was used to evaluate the numerical value of simulated impairments (CD, PDM, OSNR). The relationship between those impairments and the Hausdorff metric was also defined (Figs. 5, 6 and 7). The evaluation of one impairment can be done when other impairments are limited. It was also determined. It was proved that chromatic dispersion could be evaluated with an error ±15 ps/nm, polarization mode dispersion ±1 ps and optical signal to noise ratio ±0,5 dB.
Źródło:
Pomiary Automatyka Kontrola; 2014, R. 60, nr 9, 9; 776-779
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
First attempts to 3D printing spine implants : human spine biomechanics
Autorzy:
Gaweł, M.
Guia, A.
Jasik, K. P.
Swinarew, B.
Okła, H.
Swinarew, A.
Powiązania:
https://bibliotekanauki.pl/articles/278722.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Inżynierii Materiałów Polimerowych i Barwników
Tematy:
spine
vertebra
metric properties
mechanical properties
implant
kręgosłup
kręg
właściwości metryczne
właściwości mechaniczne
Opis:
The purpose of this paper was to obtain and compare information about spine metrics properties and indicate of polymer materials for the manufacture of spinal implants using 3D printing. The resulting properties will allow to select the material which have similar spine metrics properties or better. The literature review will be helpful to develop methodology of 3D printing in producing implants of the vertebrae and intervertebral discs (Val). The project consists three main phases: creation a creation model which is based on generating of a 3D model (Val) discs of tomographic images spine using software specially developed for medical image processing and CAD software (Val) discs, creation of a prototype implant and performance strength tests on the obtained implant.
Źródło:
Przetwórstwo Tworzyw; 2016, T. 22, Nr 2 (170), 2 (170); 60-65
1429-0472
Pojawia się w:
Przetwórstwo Tworzyw
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transformation of metric space tools for transport logistics
Autorzy:
Wierzcholski, K.
Powiązania:
https://bibliotekanauki.pl/articles/244393.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport logistics
access road
metric spaces
optimization
non-Euclidean geometry
transport engineering applications
Opis:
The numerous logistics problems occurring in power train and transport industry lead to wear of vehicles and trains as well as the road or tracks length. The choice of the proper transport requires selecting the kind of the optimum length of the way. For facilities for transport of bulk commodity, very important meaning has the distance between the place of outgoing (x) and delivery point (y). Such problem will be referring for the one, two and three spaces in the case of land transport for road and rail vehicles as well as sea and air transport for ships and airplane. It is desired that the transport from outgoing point (x) to delivery place (y) ought to be travelled on the shortest way in the presenting geometry sense. In transport, logistics denotes it the least distance between the place of the drive beginning (outgoing) and the place of drive end (delivering place). It is evident that the shortest distance between two points is always if we define this distance in Euclidean geometry sense because Euclidean metric determines the shortest distance between two points. In various transport problems the shortest distance in Euclidean sense, between two various places is not realistic and not possible. Therefore for transport vehicles exists many possibilities of various kinds of access road in Euclidean and non- Euclidean geometry. After Authors, suggestion very interesting is to find the optimum way or optimum track between the trip origin and delivery place. Such problem demands the more and more information referring the describing the tracks geometry using metric space theory. In this article, especially the non-Euclidean modulus Taxi–Car metrics is considered. Presented metric spaces and their properties are needed and applied in practical transport problems occurring among other in assembly rooms where the way of intelligent shortest truck must be considered. Moreover, in this article the various communication ways will be presented and will be suggested an algorithm construction of the optimum distance problem solutions in non-Euclidean geometry presenting the equivalent and simultaneously most simple communication tracks.
Źródło:
Journal of KONES; 2016, 23, 1; 413-420
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charged stellar model with a prescribed form of metric function y(x) in a Tolman VII spacetime
Autorzy:
Malaver, Manuel
Powiązania:
https://bibliotekanauki.pl/articles/1163837.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Compact relativistic objects
Electromagnetic field
Gravitational potential
Metric function
Tolman VII type potential
Opis:
In this paper, we study the behaviour of compact relativistic objects with charged anisotropic matter distribution considering Tolman VII type potential for the gravitational potential Z(x) and a particular form of the metric function y(x) proposed for Komathiraj and Maharaj (2007). The Einstein-Maxwell field equations are integrated analytical and we obtain the radial pressure, energy density, charge density, anisotropy and the mass function. A physical analysis of electromagnetic field indicates that is regular at the origin and well behaved. The new stellar model satisfies all physical properties in a realistic star.
Źródło:
World Scientific News; 2018, 108; 41-52
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison of objective functions of optimization-based smoothing algorithm for tetrahedral mesh improvement
Autorzy:
Dai, C.
Liu, H.-L.
Dong, L.
Powiązania:
https://bibliotekanauki.pl/articles/279637.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
objective function
mesh quality metric
optimization-based smoothing
mesh quality improvement
mesh generation
Opis:
The objective function based on mesh quality metric has a major impact on smoothing unstructured tetrahedral meshes. The ability of seven mesh quality metrics to distinguish four kinds of poor-quality elements and their effects on the change of element shape are analyzed in detail. Then, four better mesh quality metrics are chosen to construct objective functions. In addition, the rational determination of searching direction and the optimal step size in the optimization algorithm of solving the objective function are proposed. Finally, comparisons with the other three objective functions are made according to different number of elements, iteration limit, and the desired accuracy in the improved mesh. It is found that with the increase of the number of elements, the time consumed during optimization increases, but the changes of the worst quality element are different. The number of iterations has little effect on the mesh quality and the time cost. The increasing of the desired degree of accuracy will improve the mesh quality and cost more time. Furthermore, the approach using objective function is compared with Freitag’s common approach. It is clearly shown that it performs better than the existing approach.
Źródło:
Journal of Theoretical and Applied Mechanics; 2014, 52, 1; 151-163
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Common Fixed Point Theorem for Set-valued Contraction Mappings in Menger Space
Autorzy:
Pant, B. D.
Chauhan, Sunny
Kumar, Suneel
Powiązania:
https://bibliotekanauki.pl/articles/745498.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
t-norm
probabilistic metric space
set-valued mappings
weakly compatible mappings
implicit relation
Opis:
The aim of this paper is to prove a common fixed point theorem for even number of single-valued and two set-valued mappings in complete Menger space using implicit relation. Our result improves and extends the result of Chen and Chang [Common fixed point theorems in Menger spaces, Int. J. Math. Math. Sci. 2006, Art. ID 75931, 15 pp].
Źródło:
Commentationes Mathematicae; 2012, 52, 1
0373-8299
Pojawia się w:
Commentationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
3D visualization of interiors – the case of “U Jaksy” gallery
Wizualizacja 3D wnętrz na przykładzie galerii "U Jaksy"
Autorzy:
Piech, Izabela
Kowalski, Damian
Powiązania:
https://bibliotekanauki.pl/articles/2029213.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie
Tematy:
non-metric camera
3D model
visualization
kamera niemetryczna
model 3D
wizualizacja
Opis:
Many generations have tried to represent the surrounding space, often striving to do so in the most accurate way, precisely reflecting details and shapes. An important step towards the faithful representation of reality was the creation of photography. Over time, the two-dimensional spatial imaging became insufficient, forcing the creator to choose the appropriate perspective and a comprehensive, holistic view of the object. It became possible to recreate the third dimension using two-dimensional photographs, e.g. by creating a stereogram, a panorama, or developing a 3D model. Techniques related to 3D modelling have become a very important element of contemporary photogrammetry, and they allow for an interesting, effective, and metrically accurate manner of depicting reality. 3D models can be used for the inventory of objects, for their reconstruction, and for their presentation. Today, there is a great need to represent the world around us in the digital space, starting from selling products whose 3D models make it possible to see that product from every side, to the creation of three-dimensional maps with street views, such as Google street view, to creating virtual city and museum walks. The products of 3D graphics are not only used for visual effects. The models’ metric accuracy also enables numerous engineering applications. Among other things, 3D models can be used in geodesy for inventory measurements, they find their application in architecture and spatial planning, as well as in many other engineering activities related to the designing of parts, machines, and objects.
Wiele pokoleń starało się zobrazować otaczającą je przestrzeń, często w sposób jak najdokładniejszy, precyzyjnie oddający szczegóły oraz kształty. Ważnym krokiem w wiernym obrazowaniu rzeczywistości było powstanie fotografii. Z czasem dwuwymiarowe obrazowanie przestrzeni stało się niewystarczające, zmuszało twórcę do wyboru odpowiedniej perspektywy i całościowego spojrzenia na obiekt. Trzeci wymiar można było odtworzyć korzystając z dwuwymiarowych fotografii tworząc np. stereogram, panoramę, czy tworząc model 3D. Techniki związane z modelowaniem 3D, stały się bardzo ważnym elementem współczesnej fotogrametrii, pozwalają w ciekawy, efektowny, a także zachowujący metryczność sposób obrazować rzeczywistość. Modele 3D mogą być wykorzystywane do inwentaryzacji obiektów, ich rekonstrukcji i prezentacji. W dzisiejszych czasach istnieje duża potrzeba prezentacji otaczającego nas świata w przestrzeni cyfrowej. Poczynając od sprzedaży produktów, których model 3D pozwala obejrzeć produkt z każdej strony, poprzez tworzenie trójwymiarowych map z widokami ulic np. Google Street View, czy też tworzenie wirtualnych spacerów miast czy muzeów. Produkty grafiki trójwymiarowej nie są wykorzystywane jedynie do efektów wizualnych. Ich metryczność umożliwia wiele zastosowań inżynierskich. Modele 3D mogą być wykorzystywane np. w geodezji do pomiarów inwentaryzacyjnych, w architekturze, planowaniu przestrzennym. A także wielu innych dziadzinach inżynierskich związanych z projektowaniem części, maszyn, czy przedmiotów.
Źródło:
Geomatics, Landmanagement and Landscape; 2021, 2; 121-134
2300-1496
Pojawia się w:
Geomatics, Landmanagement and Landscape
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
System of boundary random fractional differential equations via Hadamard derivative
Autorzy:
Malki, Zakaria
Berhoun, Farida
Ouahab, Abdelghani
Powiązania:
https://bibliotekanauki.pl/articles/1797181.pdf
Data publikacji:
2021-04-14
Wydawca:
Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
Tematy:
Random fractional differential equation
Hadamard fractional differential equation
existence
fixed point
vector metric space
Opis:
We study the existence of solutions for random system of fractional differential equations with boundary nonlocal initial conditions. Our approach is based on random fixed point principles of Schaefer and Perov, combined with a vector approach that uses matrices that converge to zero. We prove existence and uniqueness results for these systems. Some examples are presented to illustrate the theory.
Źródło:
Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica; 2021, 20; 17-41
2300-133X
Pojawia się w:
Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization and optimization of spectrophotometric colour removal from dye containing wastewater by Coagulation-Flocculation
Autorzy:
Obiora-Okafo, I. A.
Onukwuli, O. D.
Powiązania:
https://bibliotekanauki.pl/articles/779809.pdf
Data publikacji:
2018
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
coagulation-flocculation
natural organic polymer
fibre-metric analysis
spectrophotometer
face-centred central composite design
Opis:
The performance of Vigna unguiculata coagulant (VUC) for colour removal from acid dye was investigated in this study. The proximate, structure and morphology of the coagulant were investigated using standard official methods, Fourier-Transform Infrared (FTIR) spectrometer and scanning electron microscopy (SEM), respectively. Response surface methodology (RSM) using face-centred central composite design (FCCD) optimized four process variables including pH, coagulant dosage, dye concentration and time. The colour removal efficiency obtained from the optimization analysis was 99.26% at process conditions of pH 2, coagulant dosage 256.09 mg/l, dye concentration 16.7 mg/l and time 540 min. The verification experiments agreed with the predicted values having a standard error value of 1.96%. Overlay contour plot established optimum areas where the predicted response variable is in an acceptable range (≥ 70%) with respect to optimum conditions. The FCCD approach was appropriate for optimizing the process giving higher removal efficiency when compared to the main effect plots.
Źródło:
Polish Journal of Chemical Technology; 2018, 20, 4; 49-59
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
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:
Metric regularity under approximations
Autorzy:
Dontchev, A. L.
Veliov, V. M.
Powiązania:
https://bibliotekanauki.pl/articles/970750.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
metric regularity
inexact iterative methods
Newton method
proximal point method
discrete approximation
optimal control
Opis:
In this paper we show that metric regularity and strong metric regularity of a set-valued mapping imply convergence of inexact iterative methods for solving a generalized equation associated with this mapping. To accomplish this, we first focus on the question how these properties are preserved under changes of the mapping and the reference point. As an application, we consider discrete approximations in optimal control.
Źródło:
Control and Cybernetics; 2009, 38, 4B; 1283-1303
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Od starożytności do rewolucji. Łokieć, metr i nie tylko
Autorzy:
Borzymiński, J.
Powiązania:
https://bibliotekanauki.pl/articles/1425695.pdf
Data publikacji:
2014
Wydawca:
Główny Urząd Miar
Tematy:
jednostki miar
system metryczny
historia metrologii
units of measurement
metric system
history of metrology
Opis:
Jednostki miar, zwane metrycznymi, są dla nas codziennością i oczywistością. Do tego stopnia, że wzmianka o calach, milach, włókach czy morgach wzbudza spontaniczne głosy zaniepokojenia i troski. Tymczasem metr „powstał” nieco ponad 200 lat temu, a przedtem przez parę tysięcy lat mierzono i to nieraz ze zdumiewającą nas dokładnością, w innych niż do dziś znanych jednostkach. Możemy więc mówić o swego rodzaju rewolucji, którą można by nazwać metryczną.
Źródło:
Metrologia i Probiernictwo : biuletyn Głównego Urzędu Miar; 2014, 1-2 (4-5); 37-42
2300-8806
Pojawia się w:
Metrologia i Probiernictwo : biuletyn Głównego Urzędu Miar
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On local Whitney convergence
Autorzy:
Kowalczyk, S.
Powiązania:
https://bibliotekanauki.pl/articles/121911.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
Tematy:
przestrzeń topologiczna
przestrzeń metryczna
funkcja ciągła
konwergencja
topological space
metric space
continuous function
convergence
Opis:
In this paper we will give definitions of local Whitney convergence in F(X,Y ) and in C(X,Y ), where X is a topological space, (Y,d) is a metric space and F(X,Y ) is the space of all functions from X to Y and C(X,Y ) is the space of all continuous functions from X to Y . We will study some properties of this notion and connections with other kinds of convergence.
Źródło:
Scientific Issues of Jan Długosz University in Częstochowa. Mathematics; 2012, 17; 57-68
2450-9302
Pojawia się w:
Scientific Issues of Jan Długosz University in Częstochowa. Mathematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Semi-compatibility in non-archimedean Menger PM-space
Autorzy:
Singh, Bijendra
Jain, Arihant
Agarwal, Pallavi
Powiązania:
https://bibliotekanauki.pl/articles/746307.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Non-Archimedean Menger probabilistic metric space
Common fixed points
Compatible maps
Semi-compatible maps
Opis:
The object of this paper is to establish fixed point theorem for six self maps and an example using the concept of semi-compatible self maps in a non-Archimedean Menger PM-space. Our result generalizes the result of Cho et. al. [2].
Źródło:
Commentationes Mathematicae; 2009, 49, 1
0373-8299
Pojawia się w:
Commentationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza porównawcza NMT sporządzonych ze zdjęć metrycznych i niemetrycznych na przykładzie fragmentu klifu w Jarosławcu
Comparative analysis of DTM made on the basis metric and non-metric photographs for example the clif coast fragments at Jarosławiec
Autorzy:
Marcinowski, Z.
Salik, K.
Powiązania:
https://bibliotekanauki.pl/articles/341470.pdf
Data publikacji:
2002
Wydawca:
Uniwersytet Przyrodniczy we Wrocławiu
Tematy:
fotogrametria naziemna
kamera niemetryczna
NMT
klif
terrestrial photogrammetry
non-metric camera
DTM
cliff coast
Opis:
Wybrane fragmenty klifu morskiego w Jarosławcu sfotografowano kamerą pomiarową UMK 10/1318 i aparatem fotograficznym Pentacon six TL. Zdjęcia pomierzono na stekometrze i obliczono analitycznie współrzędne przestrzenne. Pakietem programów SURFER zbudowano NMT z opracowań obu rodzajów zdjęć. Wyniki analizy porównawczej przedstawiono w postaci map izolinii różnic współrzędnej wysokościowej Z oraz w tabeli. Stwierdzono zgodność NMT, w przedziale mh = +- 0.15 m, dla 90% określanej powierzchni.
The selection fragments of the cliff coast at Jarosławiec was photographed of UMK 10/1318 camera and Pentacon six TL non-metric camera. The photographs was measured on stecometer. Next the space coordinates was calculated. DTMs was generated from elaboration of the both type of photographs on the basis SURFER software package. The result of comparative analysis was presented on the form of Z-coordinate diffrences isoline maps and on the table. It was found that DTMs was similar, on the range mh = +- 0.15 m, for 90% the determinate surface.
Źródło:
Acta Scientiarum Polonorum. Geodesia et Descriptio Terrarum; 2002, 1, 1-2; 23-31
1644-0668
Pojawia się w:
Acta Scientiarum Polonorum. Geodesia et Descriptio Terrarum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uniformly bounded Nemytskij operators generated by set-valued functions between generalized Hölder function spaces
Autorzy:
Matkowski, Janusz
Wróbel, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/729369.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
Nemytskij composition operator
uniformly bounded operator
set-valued function
generalized Hölder function metric space
Opis:
We prove that the generator of any uniformly bounded set-valued Nemytskij operator acting between generalized Hölder function metric spaces, with nonempty compact and convex values is an affine function with respect to the function variable.
Źródło:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2011, 31, 2; 183-198
1509-9407
Pojawia się w:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multicriteria Oppositional-Learnt Dragonfly Resource-Optimized QoS Driven Channel Selection for CRNs
Autorzy:
Sirisha Devi, Ch. S. N.
Maloj, Suman
Powiązania:
https://bibliotekanauki.pl/articles/2174446.pdf
Data publikacji:
2022
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
cognitive ratio network (CRN)
multicriteria dragonfly optimization
oppositional learning
optimal available channel
QoS metric
Opis:
Cognitive radio networks (CRNs) allow their users to achieve adequate QoS while communicating. The major concern related to CRN is linked to guaranteeing free channel selection to secondary users (SUs) in order to maintain the network’s throughput. Many techniques have been designed in the literature for channel selection in CRNs, but the throughput of the network has not been enhanced yet. Here, an efficient technique, known as multicriteria oppositional-learnt dragonfly resourceoptimized QoS-driven channel selection (MOLDRO-QoSDCS) is proposed to select the best available channel with the expected QoS metrics. The MOLDRO-QoSDCS technique is designed to improve energy efficiency and throughput, simultaneously reducing the sensing time. By relying on oppositional-learnt multiobjective dragonfly optimization, the optimal available channel is selected depending on signal-to-noise ratio, power consumption, and spectrum utilization. In the optimization process, the population of the available channels is initialized. Then, using multiple criteria, the fitness function is determined and the available channel with the best resource availability is selected. Using the selected optimal channel, data transmission is effectively performed to increase the network’s throughput and to minimize the sensing time. The simulated outputs obtained with the use of Matlab are compared with conventional algorithms in order to verify the performance of the solution. The MOLDRO-QoSDCS technique performs better than other methods in terms of throughput, sensing time, and energy efficiency.
Źródło:
Journal of Telecommunications and Information Technology; 2022, 4; 41--46
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Convergence of Dirichlet series on a finite-dimensional space
O zbieżności szeregu Dirichleta w przestrzeni skończenie wymiarowej
Autorzy:
Favorov, Sergii
Girya, Natalia
Powiązania:
https://bibliotekanauki.pl/articles/699802.pdf
Data publikacji:
2018
Wydawca:
Łódzkie Towarzystwo Naukowe
Tematy:
Dirichlet series, exponents of a Dirichlet series, Fourier series, Stepanov’s metric, Besicovitch’s metric, almost periodic function
szereg Dirichleta, wykładniki w szeregu Dirichleta, szereg Fouriera, metryka Stepanova, metryka Besicovitcha, funkcje prawie okresowe
Opis:
https://doi.org/10.26485/0459-6854/2018/68.2/6 Rozważamy warunki zbieżności szeregów Dirichleta w przestrzeni skończenie wymiarowej przy metryce Stepanova. Uzyskujemy też pewne zastosowania dla funkcji prawie okresowych Stepanova i Besicovitcha.
https://doi.org/10.26485/0459-6854/2018/68.2/6 We consider conditions for convergence of Dirichlet series on a finite-dimensional space in Stepanov’s metric. Also, we obtain some applications for Stepanov’s and Besicovitch’s almost periodic functions.
Źródło:
Bulletin de la Société des Sciences et des Lettres de Łódź, Série: Recherches sur les déformations; 2018, 68, 2; 61-70
1895-7838
2450-9329
Pojawia się w:
Bulletin de la Société des Sciences et des Lettres de Łódź, Série: Recherches sur les déformations
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fuzzy fixed point results with rational type contractions in partially ordered complex-valued metric spaces
Autorzy:
Sarwar, Muhammad
Humaira, Humaira
Huang, Huaping
Powiązania:
https://bibliotekanauki.pl/articles/962851.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Complex-valued metric spaces
fixed points
common fixed point
fuzzy mappings
Cauchy sequence
contractive condition
Opis:
In this manuscript, some fixed point results for fuzzy mappings with rational type contraction in the context of a complete partially ordered complex-valued metric space are established. The derived results generalize some fixed point theorems in the existing literature. An appropriate example is given.
Źródło:
Commentationes Mathematicae; 2018, 58, 1-2; 57-78
0373-8299
Pojawia się w:
Commentationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charged anisotropic models in a modified Tolman IV spacetime
Autorzy:
Malaver, Manuel
Powiązania:
https://bibliotekanauki.pl/articles/1177697.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Adjustable parameter
Compact relativistic objects
Electromagnetic field
Gravitational potential
Metric function
Tolman IV type potential
Opis:
In this paper, we study the behaviour of compact relativistic objects with charged anisotropic matter distribution considering modified Tolman IV type potential for the gravitational potential Z(x) which depends on an adjustable parameter α and a particular form of the metric function y(x) used by Malaver (2009). The Einstein-Maxwell fields equations are integrated analytical and we obtain the radial pressure, energy density, charge density, anisotropy and the mass function. A physical analysis of electromagnetic field indicates that is regular at the origin and well behaved. The new stellar models satisfies all physical properties in a realistic star for any value of the adjustable parameter.
Źródło:
World Scientific News; 2018, 101; 31-43
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza numeryczna wybranych aspektów procesu walcowania zewnętrznych gwintów metrycznych
Numerical analysis of chosen aspects of the external metric thread rolling
Autorzy:
Kukiełka, K.
Powiązania:
https://bibliotekanauki.pl/articles/310625.pdf
Data publikacji:
2016
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
analiza numeryczna
proces walcowania
zewnętrzny gwint metryczny
numerical analysis
thread rolling process
external metric thread
Opis:
W artykule przedstawiono wyniki modelowania komputerowego i analizy procesu walcowania metrycznych gwintów zewnętrznych z wykorzystaniem metody elementów skończonych. Zamieszczono przykładowe mapy przemieszczenie wypadkowych oraz zastępczych odkształcenie naprężeń.
In this article results of computer modeling and numerical analysis of the external metric thread rolling where Finite Elements Method were applied. Exemplary maps of displacement and equivalent strain and stress are presented.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 8; 281-285
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On common fixed point theorems for semi-compatible mappings in Menger space
Autorzy:
Singh, Bijendra
Jain, Arihant
Lodha, Bholaram
Powiązania:
https://bibliotekanauki.pl/articles/746271.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Probabilistic metric space
Menger space
common fixed point
compatible maps
semi-compatible maps
weak compatibility
Opis:
In this paper, the concept of semi-compatibility and weak compatibility in Menger space has been applied to prove a common fixed point theorem for six self maps. Our result generalizes and extends the result of Pathak and Verma [6].
Źródło:
Commentationes Mathematicae; 2010, 50, 2
0373-8299
Pojawia się w:
Commentationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Random perturbation of the variable metric method for unconstrained nonsmooth nonconvex optimization
Autorzy:
El Mouatasim, A.
Ellaia, R.
Souza de Cursi, J. E.
Powiązania:
https://bibliotekanauki.pl/articles/908374.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
optymalizacja
zaburzenie stochastyczne
zaburzenie losowe
nonconvex optimization
stochastic perturbation
variable metric method
nonsmooth optimization
generalized gradient
Opis:
We consider the global optimization of a nonsmooth (nondifferentiable) nonconvex real function. We introduce a variable metric descent method adapted to nonsmooth situations, which is modified by the incorporation of suitable random perturbations. Convergence to a global minimum is established and a simple method for the generation of suitable perturbations is introduced. An algorithm is proposed and numerical results are presented, showing that the method is computationally effective and stable.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2006, 16, 4; 463-474
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of liquid temperature and viscosity on the amplitude-frequency characteristics of a viscotic torsion damper
Autorzy:
Homik, W.
Powiązania:
https://bibliotekanauki.pl/articles/963357.pdf
Data publikacji:
2012
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
torsional vibration
torsional vibration damping
torsional vibration dampers
crankshaft
amplitude-frequency characteristics
liquid viscosity
damper metric
Opis:
The article discusses causes of the appearance of transverse, longitudinal and torsional crankshaft vibrations in multi-cylinder internal combustion engines. Particular attention is paid to the torsional vibration which is the most severe threat to engine crankshafts. Damping methods making use of torsion dampers are presented. With the reference to viscotic dampers, problems with their damping efficiency are discussed in the context of viscosity changes of the damping liquid. The article also presents the amplitude-frequency characteristics of a series of viscotic dampers, which were recorded experimentally on the research rig and on a real object. An idea of vibration damper metric is given.
Źródło:
Polish Maritime Research; 2012, 4; 71-77
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł

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