Results 1 to 10 of about 1,419,653 (264)

Structural Properties of Connected Domination Critical Graphs

open access: yesMathematics, 2021
A graph G is said to be k-γc-critical if the connected domination number γc(G) is equal to k and γc(G+uv)
Norah Almalki, Pawaton Kaemawichanurat
doaj   +4 more sources

Properties of Large 2-Crossing-Critical Graphs

open access: yesJournal of Graph Algorithms and Applications, 2022
A $c$-crossing-critical graph is one that has crossing number at least $c$ but each of its proper subgraphs has crossing number less than $c$. Recently, a set of explicit construction rules was identified by Bokal, Oporowski, Richter, and Salazar to ...
Drago Bokal   +6 more
doaj   +4 more sources

Generic Properties of Critical Points of the Weyl Tensor [PDF]

open access: yesAdvanced Nonlinear Studies, 2017
Given (M,g)${(M,g)}$, a smooth compact Riemannian n-manifold, we prove that for a generic Riemannian metric g the critical points of the function 𝒲g⁢(ξ):=|Weylg⁢(ξ)|g2${\mathcal{W}_{g}(\xi):=\lvert\mathrm{Weyl}_{g}(\xi)\rvert^{2}_{g}}$ with 𝒲g⁢(ξ)≠0 ...
Micheletti Anna Maria, Pistoia Angela
doaj   +3 more sources

New method based on neuro-fuzzy system and PSO algorithm for estimating phase equilibria properties [PDF]

open access: yesChemical Industry and Chemical Engineering Quarterly, 2022
The subject of this work is to propose a new method based on the ANFIS system and PSO algorithm to conceive a model for estimating the solubility of solid drugs in supercritical CO2 (sc-CO2).
Hadj Abdallah Abdallah El   +2 more
doaj   +1 more source

Critical Properties and Acentric Factors of Pure Compounds Modelling Based on QSPR-SVM with Dragonfly Algorithm [PDF]

open access: yesKemija u Industriji, 2021
This work aimed to model the critical pressure, temperature, volume properties, and acentric factors of 6700 pure compounds based on five relevant descriptors and two thermodynamic properties.
Mohammed Moussaoui   +4 more
doaj   +1 more source

The Application of USEPA Model for Identification of Dust Sources in the Delazan District, Semnan County [PDF]

open access: yesپژوهش‌های آبخیزداری, 2021
Wind erosion and dust generation is a great challenge worldwide, especially in Iran. Identification of the dust source is the first step in mitigating this occurrence.
Davood Namdar Khojasteh, Esmail Moradi
doaj   +1 more source

Ageing properties of critical systems [PDF]

open access: yesJournal of Physics A: Mathematical and General, 2005
In the past few years systems with slow dynamics have attracted considerable theoretical and experimental interest. Ageing phenomena are observed during this ever-lasting non-equilibrium evolution. A simple instance of such a behaviour is provided by the dynamics that takes place when a system is quenched from its high-temperature phase to the critical
Calabrese, Pasquale, Gambassi, Andrea
openaire   +3 more sources

Estimation of Critical and Thermophysical Properties of Saturated Cyclic Alkanes by Group Contributions

open access: yesJournal of Nigerian Society of Physical Sciences, 2022
Group Contribution Methods (GCMs) of Marrero & Gani (M & G), Constantinou & Gani (C & G) and Lydersen (LYD) were employed in the prediction of some critical and thermophysical properties(TPPs), namely; critical temperature (Tc), critical pressure (Pc ...
C. Otobrise, G. A. Orotomah
doaj   +1 more source

Critical Energy Properties Study for Unsymmetrical Deformable Structures

open access: yesBuildings, 2022
There are difficulties in the formulation and solution of problems for follower loading, temperature actions, and whether the Lagrange principle is used.
Leonid Stupishin, Vladimir Mondrus
doaj   +1 more source

Critical properties of a comb lattice

open access: yesSciPost Physics, 2020
In this paper we study the critical properties of the Heisenberg spin-1/2 model on a comb lattice -- a 1D backbone decorated with finite 1D chains -- the teeth.
Natalia Chepiga, Steven R. White
doaj   +1 more source

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