Results 91 to 100 of about 1,344,372 (340)

Finite dimensional exponential attractor for the phase field model

, 1993
We consider the phase field equations in arbitrary space dimension. We show that the corresponding boundary value problems are well-posed when assuming that the initial data is square integrable and prove the existence of a maximal attractor and of an ...
D. Brochet, D. Hilhorst, Xinfu Chen
semanticscholar   +1 more source

Exponential attractors for abstract equations with memory and applications to viscoelasticity

Discrete & Continuous Dynamical Systems - A, 2015
We consider an abstract equation with memory of the form $$\partial_t \boldsymbol{x}(t)+\int_{0}^\infty k(s) \boldsymbol{A}\boldsymbol{x}(t-s){\rm d} s+\boldsymbol{B}\boldsymbol{x}(t)=0$$ where $\boldsymbol{A},\boldsymbol{B}$ are operators acting on some Banach space, and the convolution kernel $k$ is a nonnegative convex summable function of unit mass.
DANESE, VALERIA, Geredeli, P. G., PATA, VITTORINO   +2 more
openaire   +4 more sources

Ultra‐Fast Non‐Volatile Resistive Switching Devices with Over 512 Distinct and Stable Levels for Memory and Neuromorphic Computing

Advanced Functional Materials, EarlyView.
A materials and device design concept that comprises a self‐assembled ultra‐thin epitaxial ion‐transporting layer, an amorphous oxide overcoat oxygen‐blocking layer, and a partial filament formed during an electroforming step is proposed for low‐current multilevel resistive switching devices.
Ming Xiao, Markus Hellenbrand, Nives Strkalj, Babak Bakhit, Zhuotong Sun, Nikolaos Barmpatsalos, Dovydas Joksas, Hongyi Dou, Zedong Hu, Ping Lu, Samip Karki, Sundar Kunwar, Jonathan D. Major, Aiping Chen, Haiyan Wang, Quanxi Jia, Adnan Mehonic, Judith L. MacManus‐Driscoll   +17 more
wiley   +1 more source

Sustained Release of Proteins Using Region‐Specific Tunable Degradability in Hydrogels through 3D Photopatterning and Complimentary Labile Bond Chemistry

Advanced Functional Materials, EarlyView.
A series of ultraviolet‐ and near‐infrared radiation sensitive photoactivatable hydrogels are developed that can be controlled spatiotemporally down to µm precisions using one‐ and two‐photon uncaging. The latent hydroxylamine‐, hydrazine‐, and amine uncaged moieties are used to photopattern a series of diverse proteins displaying complimentary ...
Tove Kivijärvi, Carmine P. Cerrato, Taha Behroozi Kohlan, Paul O’Callaghan, Johan Kreuger, Marie Arsenian‐Henriksson, Anna Finne‐Wistrand   +6 more
wiley   +1 more source

Heteroclinic Chaos, Chaotic Itinerancy and Neutral Attractors in Symmetrical Replicator Equations with Mutations [PDF]

, 2000
A replicator equation with mutation processes is numerically studied. Without any mutations, two characteristics of the replicator dynamics are known: an exponential divergence of the dominance period, and hierarchical orderings of the attractors. A mutation introduces some new aspects: the emergence of structurally stable attractors, and chaotic ...
arxiv   +1 more source

Switching From Acceptor to FRET Donor: How the Organic Solar Cell Architecture Can Change the Role of a Chromophore

Advanced Functional Materials, EarlyView.
The non‐fullerene acceptor o‐IDT‐BT‐DCV is used in both binary and ternary blends to investigate the role that it plays in each device architecture. The charge generation pathways are found to differ between the binary and ternary blends with o‐IDT‐BT‐DCV becoming a second donor in the ternary blend.
Hui Jin, Neil Mallo, Guanran Zhang, Oliver Lindsay, Ronan Chu, Mile Gao, Shaun McAnally, Isaac M. Etchells, Paul L. Burn, Ian R. Gentle, Paul E. Shaw   +10 more
wiley   +1 more source

Interfacial Contact Engineering Enables Giant‐Performance Semiconductor Nanomembrane Optoelectronic Devices

Advanced Functional Materials, EarlyView.
This work investigates modifying interfacial contacts in realizing giant‐performance semiconductor nanomembrane optoelectronics. Strategies, including surface reaction and buffer layer work‐function modulation, are explored to boost the Schottky barrier. An emerging material of YbOx is utilized for near‐ideal Ohmic contact.
Yibo Zhang, Gloria Vytas, Haozhe Wang, Sara Almenabawy, Zheng‐Hong Lu, Nazir P. Kherani   +5 more
wiley   +1 more source

Exponential Synchronization of the Hopfield Neural Networks with New Chaotic Strange Attractor

ITM Web of Conferences, 2017
This paper studies the problems of exponential synchronization for the Hopfield neural networks with impulsive effects and Gui chaotic strange attractor.
Gui Zhan-Ji, Wang Kai-Hua
doaj   +1 more source

Dynamical analysis for a scalar–tensor model with Gauss–Bonnet and non-minimal couplings

European Physical Journal C: Particles and Fields, 2017
We study the autonomous system for a scalar–tensor model of dark energy with Gauss–Bonnet and non-minimal couplings. The critical points describe important stable asymptotic scenarios including quintessence, phantom and de Sitter attractor solutions. Two
L. N. Granda, D. F. Jimenez
doaj   +1 more source

Predicting 2D Crystal Packing in Thin Films of Small Molecule Organic Materials

Advanced Functional Materials, EarlyView.
A computational method is proposed for predicting the 2D molecular packing in crystalline thin films of flexible organic molecules. The approach employs a grid search for molecular arrangements, achieving accurate predictions of 2D packing motifs with strongly reduced computational costs.
Alexey O. Gudovannyy, Julia M. Schäfer, Olga Gerdes, Dirk Hildebrandt, Gunter Mattersteig, Martin Pfeiffer, Frank Ortmann   +6 more
wiley   +1 more source