Results 101 to 110 of about 10,848 (254)

Oscillation of certain difference equations [PDF]

, 1994
summary:Some new criteria for the oscillation of difference equations of the form \[ \Delta ^2 x_n - p_n \Delta x_{n-h} + q_n |x_{g_n}|^c \mathop {\mathrm sgn}x_{g_n} = 0 \] and \[ \Delta ^i x_n + p_n \Delta ^{i-1} x_{n-h} + q_n |x_{g_n}|^c \mathop ...
Lalli, B.S., Grace, S. R., S. R. Grace, Grace, S.R.   +3 more
core   +1 more source

Effect of Non-Sine Oscillation of Mold on Lubrication of Mold Flux and Surface Quality of Cast Billet

Teshugang, 2017
With using the theory of mold lubrication effect and by theory calculation on relation between mold oscillation parameters and liquid friction force and mold powder consumption, it is obtained that with increasing mold oscillation frequency the ...
白晓路, 彭家清, 李孟雄
doaj  

Tuning Amorphous‐Crystalline Catalytic Interfaces by Mechanochemistry: Cu‐Based Metallic Glasses Coupled with Ceria for CO Oxidation

Advanced Materials, EarlyView.
Ball‐milling Cu‐based metallic glasses with ceria creates a unique nanostructure where metallic glass particles are wrapped by CeO2 nanoparticles. The intimate integration triggers copper state reorganization during reaction and aging, boosting CO oxidation and COPrOx activity.
Maahin Mirzay‐Shahim, Mehran Nabahat, Laia Pascua‐Solé, Isabel Serrano, Ilaria Lucentini, Xènia Garcia, Marina Armengol‐Profitós, Asier Agrelo‐Lestón, Ignasi Burgués‐Ceballos, Núria J. Divins, Ignacio J. Villar‐Garcia, Virginia Pérez‐Dieste, Carlos Escudero, Carlo Marini, Jordi Llorca, Eloi Pineda, Pere Bruna, Lluís Soler   +17 more
wiley   +1 more source

Discussion on Lorentz invariance violation of noncommutative field theory and neutrino oscillation

, 2017
Depending on deformed canonical anticommutation relations, massless neutrino oscillation based on Lorentz invariance violation in noncommutative field theory is discussed.
Cui-Bai Luo, Yong-Long Wang, Yi-Lun Du, Hong-Shi Zong, Song Shi   +4 more
core   +1 more source

Synchronization of Low-Frequency Oscillation in Power Systems

Energies, 2017
This paper presents the well-documented concept of synchronization of low frequency oscillation occurring in power systems and describes the characteristics of sync occurring in basic electrical circuits.
Kwan-Shik Shim, Seon-Ju Ahn, Joon-Ho Choi   +2 more
doaj   +1 more source

A Functional 2D Carbon Allotrope Combining Nanoporous Graphene and Biphenylene Segments

Advanced Materials, EarlyView.
The synthesis of a novel nanoporous graphene (NPG) is reported with biphenylene segments via thermal fusion of 12‐armchair porous graphene nanoribbons grown on gold surfaces. Characterization using STM, AFM, and DFT reveals low‐defect semiconducting behaviour and tunable band gaps.
Paula Angulo‐Portugal, Martin Irizar, Longfeng Huang, Mamun Sarker, Mustafa A. Ashoush, Zakaria M. Abd El‐Fattah, Johannes Barth, Frederik Schiller, Afaf El‐Sayed, Fei Gao, Dimas G. de Oteyza, Alexander Sinitskii, Aran Garcia‐Lekue, Martina Corso, Ignacio Piquero‐Zulaica   +14 more
wiley   +1 more source

Necessary and sufficient conditions for the oscillation of forced nonlinear second order delay difference equation [PDF]

, 1993
summary:In this paper the authors give necessary and sufficient conditions for the oscillation of solutions of nonlinear delay difference equations of Emden– Fowler type in the form $\Delta ^2y_{n-1}+q_ny_{\sigma (n)}^\gamma =g_n$, where $\gamma $ is a ...
Thandapani, E., Paul W. Spikes, John R. Graef, Ramuppillai, L.   +3 more
core   +1 more source

Oscillation results on meromorphic solutions of second order differential equations in the complex plane

Electronic Journal of Qualitative Theory of Differential Equations, 2010
The main purpose of this paper is to consider the oscillation theory on meromorphic solutions of second order linear differential equations of the form $f^{''}+A(z)f=0$ where $A$ is meromorphic in the complex plane. We improve and extend some oscillation
Ting-Bin Cao, Lei-Min Li
doaj   +1 more source

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

On some aspects of oscillation theory and geometry

, 2013
The aim of this paper is to analyze some of the relationships between oscillation theory for linear ordinary differential equations on the real line (shortly, ODE) and the geometry of complete Riemannian manifolds.
MARI, Luciano, M. Rigoli, Bianchini, Bruno, L. Mari, Rigoli, Marco, B. Bianchini   +5 more
core   +1 more source