Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Critical" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 45
Tytuł:
On vertex b-critical trees
Autorzy:
Blidia, M.
Eschouf, N. I.
Maffray, F.
Powiązania:
https://bibliotekanauki.pl/articles/254799.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
b-coloring
b-critical graphs
b-critical trees
Opis:
A b-coloring is a proper coloring of the vertices of a graph such that each color class has a vertex that has neighbors of all other colors. The b-chromatic number of a graph G is the largest k such that G admits a b-coloring with k colors. A graph G is b-critical if the removal of any vertex of G decreases the b-chromatic number. We prove various properties of b-critical trees. In particular, we characterize b-critical trees.
Źródło:
Opuscula Mathematica; 2013, 33, 1; 19-28
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Liquid unloading optimization from gas wells which exploit depleted reservoirs
Autorzy:
Tataru, A.
Stefanescu, D. P.
Simescu, B.
Powiązania:
https://bibliotekanauki.pl/articles/298900.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
liquid unloading
optimization
depleted reservoirs
critical velocity
critical flow
Opis:
One of the most important aspects in natural gas exploitation, which must be constantly monitored, is the liquid impurities loading in gas wells, mostly in depleted reservoirs. The extension of this phenomenon is observed, as the natural gas reservoirs are depleted, thus substantially reduction of the reservoir pressure. The increasing quantity of liquid impurities is a major problem in gas depleted reservoirs exploitation, which could not be naturally removed in energetical depletion conditions. In this period, to avoid liquids acumulation and afterwards flooding, wells must produce with a minimum flow, named critical flow, under whose value is not possible the unloading of accumulated liquids. Wells can produce without liquid accumulations if in the tubing is obtained a gas flow velocity, greater than the liquid drop free dowfall speed limit. The velocity and critical flow depend on bottom hole or surface dynamie pressure, flow section diameter, liquid and gas density, water superficial strength. Liquid flow inerease during gas depleted reservoir exploitation, but only a part of this quantity is naturally unloaded by gas stream, the other part tend to accumulate to the bottom hole. In this conditions, the dynamie bottom hole pressure will inerease continuosly, causing continuous dropping and pronounced gas flow rate, until the well floods and stops producing. Early recognition of signs that indicates well liquid loading and the most suitable lifting system selection can eliminate problems before the production drops and layers damage.
Źródło:
AGH Drilling, Oil, Gas; 2014, 31, 2; 241-
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nonlinear elliptic equations involving the p-laplacian with mixed Dirichlet-Neumann boundary conditions
Autorzy:
Bonanno, Gabriele
D'Agui, Giuseppina
Sciammetta, Angela
Powiązania:
https://bibliotekanauki.pl/articles/254739.pdf
Data publikacji:
2019
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
mixed problem
critical points
Opis:
In this paper, a nonlinear differential problem involving the p-Laplacian operator with mixed boundary conditions is investigated. In particular, the existence of three non-zero solutions is established by requiring suitable behavior on the nonlinearity. Concrete examples illustrate the abstract results.
Źródło:
Opuscula Mathematica; 2019, 39, 2; 159-174
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the diameter of dot-critical graphs
Autorzy:
Mojdeh, D. A.
Mirzamani, S.
Powiązania:
https://bibliotekanauki.pl/articles/255186.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
dot-critical graph
domination
diameter
Opis:
A graph G is k-dot-critical (totally k-dot-critical) if G is dot-critical (totally dot-critical) and the domination number is k. In the paper [T. Burtona, D. P. Sumner, Domination dot-critical graphs, Discrete Math, 306(2006), 11-18] the following question is posed: What are the best bounds for the diameter of a k-dot-critical graph and a totally k-dot-critical graph G with no critical vertices for k ≥ 4? We find the best bound for the diameter of a k-dot-critical graph, where k ∈ {4, 5, 6} and we give a family of k-dot-critical graphs (with no critical vertices) with sharp diameter 2k - 3 for even k ≥ 4.
Źródło:
Opuscula Mathematica; 2009, 29, 2; 165-175
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prediction of conditions of longterm operated drill pipes failure
Autorzy:
Vytyaz, O.
Powiązania:
https://bibliotekanauki.pl/articles/298787.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
critical stress intensity factor
cracks
Opis:
An experimental assessment of the force criterion for metal failure of longterm drill pipes operation wascarried out. Defined were the conditions under which during tripping the failure of longterm operated drillpipes is possible when they contain an external or internal circumferential transverse crack. The interrelationof critical external or internal circumferential transverse cracks in drill pipes to the drilling stringweight was established. It was shown that the internal cross cracks during drilling string tripping at depthsexceeding 3000 m are more dangerous than the external ones, whereas within the range of 1000–3000 m the external circumferential transverse cracks are more dangerous.
Źródło:
AGH Drilling, Oil, Gas; 2017, 34, 1; 15-26
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the existence of three solutions for quasilinear elliptic problem
Autorzy:
Goncerz, P.
Powiązania:
https://bibliotekanauki.pl/articles/254869.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
critical point
elliptic problem
minimax inequality
p-Laplacian
three critical points theorem
weak solution
Opis:
We consider a quasilinear elliptic problem of the type - Δpu = λ (ƒ (u)+ μg(u)) in Ω, u/∂Ω = 0, where Ω ⊂ RN is an open and bounded set, ƒ, g are continuous real functions on R and , λ, μ ∈ R. We prove the existence of at least three solutions for this problem using the so called three critical points theorem due to Ricceri.
Źródło:
Opuscula Mathematica; 2012, 32, 3; 473-486
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Entire solutions for some critical equations in the Heisenberg group
Autorzy:
Pucci, Patrizia
Temperini, Letizia
Powiązania:
https://bibliotekanauki.pl/articles/2048898.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Heisenberg group
entire solutions
critical exponents
Opis:
We complete the study started in the paper [P. Pucci, L. Temperini, On the concentration-compactness principle for Folland-Stein spaces and for fractional horizontal Sobolev spaces, Math. Eng. 5 (2023), Paper no. 007], giving some applications of its abstract results to get existence of solutions of certain critical equations in the entire Heinseberg group. In particular, different conditions for existence are given for critical horizontal p-Laplacian equations.
Źródło:
Opuscula Mathematica; 2022, 42, 2; 279-303
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Existence and multiplicity results for quasilinear equations in the Heisenberg group
Autorzy:
Pucci, Patrizia
Powiązania:
https://bibliotekanauki.pl/articles/254748.pdf
Data publikacji:
2019
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Heisenberg group
entire solutions
critical exponents
Opis:
In this paper we complete the study started in [Existence of entire solutions for quasilinear equations in the Heisenberg group, Minimax Theory Appl. 4 (2019)] on entire solutions for a quasilinear equation [formula] in Hn, depending on a real parameter λ, which involves a general elliptic operator A in divergence form and two main nonlinearities. Here, in the so called sublinear case, we prove existence for all λ > 0 and, for special elliptic operators A, existence of infinitely many solutions [formula].
Źródło:
Opuscula Mathematica; 2019, 39, 2; 247-257
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Existence results for a sublinear second order dirichlet boundary value problem on the half-line
Autorzy:
Bouafia, Dahmane
Moussaoui, Toufik
Powiązania:
https://bibliotekanauki.pl/articles/254787.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Ekeland’s variational principle
critical point
Opis:
.In this paper we study the existence of nontrivial solutions for a boundary value problem on the half-line, where the nonlinear term is sublinear, by using Ekeland’s variational principle and critical point theory.
Źródło:
Opuscula Mathematica; 2020, 40, 5; 537-548
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Weakly connected domination critical graphs
Autorzy:
Lemańska, M.
Patyk, A.
Powiązania:
https://bibliotekanauki.pl/articles/255051.pdf
Data publikacji:
2008
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
weakly connected domination number
tree
critical graphs
Opis:
A dominating set D ⊂ V(G) is a weakly connected dominating set in G if the subgraph G[D]w = (NG[D], Ew) weakly induced by D is connected, where Ew is the set of all edges with at least one vertex in D. The weakly connected domination number ϒw(G) of a graph G is the minimum cardinality among all weakly connected dominating sets in G. The graph is said to be weakly connected domination critical (ϒw-critical) if for each u, v ∈ V(G) with v not adjacent to u, ϒw(G + vu) < ϒw(G). Further, G is k- ϒw-critical if ϒw(G) = k and for each edge e ∉ E(G), ϒw(G + e) < k. In this paper we consider weakly connected domination critical graphs and give some properties of 3-ϒw,-critical graphs.
Źródło:
Opuscula Mathematica; 2008, 28, 3; 325-330
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On b-vertex and b-edge critical graphs
Autorzy:
Eschouf, N. I.
Blidia, M.
Powiązania:
https://bibliotekanauki.pl/articles/952798.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
b-coloring
b-chromatic number
critical graphs
Opis:
A b-coloring is a coloring of the vertices of a graph such that each color class contains a vertex that has a neighbor in all other color classes, and the b-chromatic number b(G) of a graph G is the largest integer k such that G admits a b-coloring with k colors. A simple graph G is called b+-vertex (edge) critical if the removal of any vertex (edge) of G increases its b-chromatic number. In this note, we explain some properties in b+-vertex (edge) critical graphs, and we conclude with two open problems.
Źródło:
Opuscula Mathematica; 2015, 35, 2; 171-180
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On a new critical point theorem and some applications to discrete equations
Autorzy:
Galewski, M.
Galewska, E.
Powiązania:
https://bibliotekanauki.pl/articles/254737.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
critical point
multiplicity
discrete equation
Fenchel-Young transform
Opis:
Using the Fenchel-Young duality we derive a new critical point theorem. We illustrate our results with solvability for certain discrete BVP. Multiple solutions are also considered.
Źródło:
Opuscula Mathematica; 2014, 34, 4; 725-732
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Continuous spectrum of Steklov nonhomogeneous elliptic problem
Autorzy:
Allaoui, M.
Powiązania:
https://bibliotekanauki.pl/articles/254696.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Steklov problem
critical point theorem
p(x)-Laplacian
Opis:
By applying two versions of the mountain pass theorem and Ekeland's variational principle, we prove three different situations of the existence of solutions for the following Steklov problem: [formula] where Ω ⊂ RN (N ≥ 2) is a bounded smooth domain and p, q: Ω → (1, + ∞) are continuous functions.
Źródło:
Opuscula Mathematica; 2015, 35, 6; 853-866
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Concentration compactness results for systems in the Heisenberg group
Autorzy:
Pucci, Patrizia
Temperini, Letizia
Powiązania:
https://bibliotekanauki.pl/articles/255214.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Heisenberg group concentration-compactness
critical exponents
Hardy terms
Opis:
In this paper we complete the study started in [P. Pucci, L. Temperini, Existence for (p,q) critical systems in the Heisenberg group, Adv. Nonlinear Anal. 9 (2020), 895-922] on some variants of the concentration-compactness principle in bounded PS domains Ω of the Heisenberg group [formula]. The concentration-compactness principle is a basic tool for treating nonlinear problems with lack of compactness. The results proved here can be exploited when dealing with some kind of elliptic systems involving critical nonlinearities and Hardy terms.
Źródło:
Opuscula Mathematica; 2020, 40, 1; 151-163
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Existence of critical elliptic systems with boundary singularities
Autorzy:
Yang, J.
Zhou, Y.
Powiązania:
https://bibliotekanauki.pl/articles/255237.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
existence
compactness
critical Hardy-Sobolev exponent
nonlinear system
Opis:
In this paper, we are concerned with the existence of positive solutions of the following nonlinear elliptic system involving critical Hardy-Sobolev exponent [formula] where N ≥4 and Ω is a C1 bounded domain in RN with [formula].The case when 0 belongs to the boundary of Ω is closely related to the mean curvature at the origin on the boundary. We show in this paper that problem (*) possesses at least a positive solution.
Źródło:
Opuscula Mathematica; 2013, 33, 2; 373-390
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 45

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies