Results 91 to 100 of about 1,035,375 (308)

A difference-based approach in the partially linear model with dependent errors

Journal of Inequalities and Applications, 2018
We study asymptotic properties of estimators of parameter and non-parameter in a partially linear model in which errors are dependent. Using a difference-based and ordinary least square (DOLS) method, the estimator of an unknown parametric component is ...
Zhen Zeng, Xiangdong Liu
doaj   +1 more source

Nonlinear Dynamics and Invariants of Motion in ReRAM Cells

Advanced Electronic Materials, EarlyView.
A second‐order cell, hosting one capacitor and two back‐to‐back ReRAMs, admits Invariants of Motion: its states lie on one‐dimensional manifolds at all times. The cell shows quiescent monostability or bistability, depending on the manifold index. At equilibrium, the capacitor voltage vanishes.
Mauro Di Marco, Mauro Forti, Luca Pancioni, Giacomo Innocenti, Alberto Tesi, Alon Ascoli   +5 more
wiley   +1 more source

Mann iteration and fixed point theorems for multidimensional matrix transforms with asymptotic properties

Journal of Inequalities and Applications
Fixed point theorems for nonexpansive mappings are extended to double sequences using four-dimensional matrix transforms. Asymptotic dominance is introduced to unify iteration schemes, including a Mann iteration for Pringsheim convergence, and asymptotic
Sami M. Hamid, Richard F. Patterson
doaj   +1 more source

Counter‐Halide‐Directed Ion‐Pair Passivation Enables High‐Performance Wide‐Bandgap Perovskites for Perovskite/Cu(In,Ga)Se2 Tandem Solar Cells

Advanced Energy Materials, EarlyView.
Counter‐halide engineering of fluorobenzylammonium surface passivators reveals bromide as the optimal partner for wide‐bandgap perovskites. FBz–Br effectively stabilizes halide‐vacancy‐related defects and undercoordinated Pb sites, suppresses non‐radiative recombination, and enhances surface hydrophobicity and thermal stability.
Huyen Tran, Dong Gyu Lee, Ahreum Lee, Inchan Hwang, Van Hung Tran, Jun Hyeok Choi, Junseop Byeon, Yu Jin Kim, Sang Hwan Nam, Jihye Gwak, Seung Kyu Ahn, Sungjun Hong, Kihwan Kim, Bong Joo Kang, Minwoo Park, SeJin Ahn, Tae Kyung Lee, Inyoung Jeong   +17 more
wiley   +1 more source

Local Linear Fitting Under Near Epoch Dependence: Uniform consistency with Convergence Rates [PDF]

Local linear fitting is a popular nonparametric method in statistical and econometric modelling. Lu and Linton (2007) established the pointwise asymptotic distribution for the local linear estimator of a nonparametric regression function under the ...
Zudi Lu, Degui Li, Oliver Linton
core  

Nickel‐Free Perovskite Solar Cells Enabled by Self‐Assembled Monolayers: A Pathway to Efficient and Recyclable Devices

Advanced Energy Materials, EarlyView.
Replacing toxic NiOx with phenyl‐substituted phosphonic‐acid carbazole monolayers (Ph‐5PACz) yields inverted perovskite solar cells that are efficient and recyclable. The nickel‐free interface reaches 25.3% efficiency and enables closed‐loop ITO recovery with near‐98% performance retention, while life‐cycle and techno‐economic analyses confirm lower ...
Yanxue Wang, Roman Kučera, Sinuhé Perea‐Puente, Mykhailo Sytnyk, Andrew Hainer, Zijian Peng, Savannah Bennett, Juan S. Rocha‐Ortiz, Albert These, Hakan U Dag, Qi Fan, Anastasia Barabash, Zhenni Wu, Chaohui Li, Jens Hauch, Olga Kasian, Christoph J. Brabec, Ian Marius Peters   +17 more
wiley   +1 more source

M−estimation in periodic Threshold GARCH models: Consistency and asymptotic normality

Miskolc Mathematical Notes
The present paper derives convergence rates and asymptotic normality of a class of M ...
Ahmed Ghezal, Imane Zemmouri
doaj   +1 more source

Asymptotic Stability of a Class of Impulsive Delay Differential Equations

Journal of Applied Mathematics, 2012
This paper is concerned with a class of linear impulsive delay differential equations. Asymptotic stability of analytic solutions of this kind of equations is studied by the property of delay differential equations without impulsive perturbations.
G. L. Zhang, M. H. Song, M. Z. Liu
doaj   +1 more source

Stabilization of Underactuated Surface Vessels: A Continuous Fractional Power Control Method

Applied Sciences, 2018
This paper investigates the problem of global asymptotic stabilization of underactuated surface vessels (USVs) whose dynamics features off-diagonal inertia and damping matrices.
Pengfei Zhang, Ge Guo
doaj   +1 more source

Heterogeneity in Food Price Inflation Convergence Across the EU: Evidence From Club Dynamics and Structural Breaks

Agribusiness, EarlyView.
ABSTRACT This study examines food price inflation rate convergence among EU27 Member States from 2005 to 2024, focusing on structural breaks, external shocks, and regional disparities. Using panel unit root tests and club convergence analysis, the findings reveal no overall convergence but identify multiple convergence clubs.
Tibor Bareith, Imre Fertő
wiley   +1 more source