Results 61 to 70 of about 326 (253)

Microstructure, Thermal Transport, and Dry‐Sliding Tribology of Powder‐Metallurgy Al7075 Composites Reinforced With Sol–Gel‐Derived ZnO–rGO Hybrid Nanoparticles

open access: yesAdvanced Engineering Materials, EarlyView.
Sol–gel‐derived ZnO–rGO hybrid nanoparticles enable Al7075 powder‐metallurgy composites to achieve concurrent gains in hardness and thermal conductivity while markedly lowering friction and wear. The hybrid architecture couples ZnO‐based load support with rGO‐assisted lamellar sliding and heat spreading, revealing a promising route toward lightweight ...
Bunyamin Aksakal   +3 more
wiley   +1 more source

Fixed point results for generalized cyclic contraction mappings in partial metric spaces [PDF]

open access: yes, 2011
[EN] Rus (Approx. Convexity 3:171–178, 2005) introduced the concept of a cyclic contraction mapping. Subsequently, Păcurar and Rus (Nonlinear Anal. 72:1181–1187, 2010) proved several fixed point results for cyclic φ-contraction mappings in metric spaces.
Romaguera Bonilla, Salvador   +5 more
core   +1 more source

Defect Evolution and Mechanical Performance of Fused Filament Fabrication‐Manufactured 17‐4PH Stainless Steel Revealed by X‐Ray Computed Tomography

open access: yesAdvanced Engineering Materials, EarlyView.
X‐ray computed tomography reveals how process‐induced defects evolve from green to sintered states in Fused Filament Fabrication (FFF)‐manufactured 17‐4PH stainless steel. Internal porosity, weakest cross‐sections, and fracture locations show strong correlation with tensile performance, demonstrating the potential of computed tomography (CT)‐based ...
György Ledniczky   +3 more
wiley   +1 more source

Third Order Dynamical Systems for the Sum of Two Generalized Monotone Operators [PDF]

open access: yesJournal of Optimization Theory and Applications
AbstractIn this paper, we propose and analyze a third-order dynamical system for finding zeros of the sum of two generalized operators in a Hilbert space $$\mathcal {H}$$ H . We establish the existence and uniqueness of the trajectories generated by the system under appropriate continuity conditions, and prove ...
Pham Viet Hai, Phan Tu Vuong
openaire   +2 more sources

Fixed point theory in metric and normed Spaces

open access: yes, 2022
In this dissertation, we present major results in the theory of fixed points in metric and normed spaces. We start with a review of the Banach fixed point theorem and some of its applications (in systems of linear equations, differential equations ...
Naude, Luan
core  

Fredholm alternatives and surjectivity results for multivalued $A$-proper and condensing mappings with applications to nonlinear integral and differential equations [PDF]

open access: yes, 1975
This paper deals with the solvability of the equation A(u) − S(u) = f, where A is a continuous self-adjoint operator defined on a real Hilbert space H with values in H, the null-space of A is nontrivial, and N is a nonlinear completely continuous ...
Fučík, Svatopluk   +3 more
core   +1 more source

Enhanced Terahertz Thermoelectricity Via Engineered Van Hove Singularities and Nernst Effect in Moiré Superlattices

open access: yesAdvanced Functional Materials, EarlyView.
Moiré band engineering in graphene/hexagonal boron nitride–based superlattices unlocks van Hove singularities (VHSs) for terahertz (THz) optoelectronics. Tuning the Fermi level near these singularities, associated with secondary neutrality points (SNPs), enhances the photothermoelectric response.
Leonid Elesin   +16 more
wiley   +1 more source

A complement to monotonicity of generalized Furuta-type operator functions

open access: yesLinear Algebra and its Applications, 2009
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Ito, Masatoshi, Kamei, Eizaburo
openaire   +1 more source

Some results on quasi-monotone and pseudo-monotone operators and applications.

open access: yes, 1997
In this thesis, we shall introduce the concepts of h-quasi-monotone, quasi-monotone, bi-quasi-monotone, h-quasi-semi-monotone, quasi-semi-monotone, quasi-nonexpansive, semi-nonexpansive, lower hemi-continuous, upper hemi-continuous, weakly lower ...
Chowdhury, Mohammad Showkat Rahim.
core  

Open problems posed at the eighth international conference on fuzzy set theory and applications [PDF]

open access: yes, 2006
summary:Several open problems posed during FSTA 2006 (Liptovský Ján, Slovakia) are presented. These problems concern the classification of strict triangular norms, Lipschitz t-norms, interval semigroups, copulas, semicopulas and quasi- copulas, fuzzy ...
Sempi, Carlo   +6 more
core   +1 more source

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