Results 101 to 110 of about 13,308 (240)

A Note on Local Polynomial Regression for Time Series in Banach Spaces

Journal of Time Series Analysis, EarlyView.
ABSTRACT This work extends local polynomial regression to Banach space‐valued time series for estimating smoothly varying means and their derivatives in non‐stationary data. The asymptotic properties of both the standard and bias‐reduced Jackknife estimators are analyzed under mild moment conditions, establishing their convergence rates.
Florian Heinrichs
wiley   +1 more source

Comparative Study in Controlling Outliers and Multicollinearity Using Robust Performance Jackknife Ridge Regression Estimator Based on Generalized-M and Least Trimmed Square Estimator

Jambura Journal of Mathematics
Regression analysis is one of the statistical methods used to determine the causal relationship between one or more explanatory variables to the affected variable.
Gustina Saputri, Netti Herawati, Tiryono Ruby, Khoirin Nisa   +3 more
doaj   +1 more source

The Impact of Climate Change on the Spatial Distribution of Seven <i>Meconopsis</i> Species in China: A MaxEnt Model-Based Predictive Analysis. [PDF]

Ecol Evol
We addressed this gap by evaluating the current and future distribution of eight Meconopsis species using optimized MaxEnt modeling and the WorldClim 2.1 bioclimatic datasets. Our research provides critical insights into the divergent fates of these species under future climate scenarios.
Yang Y, Ma J, Chen X, Zhang L, Tu P, Pan Y.   +5 more
europepmc   +2 more sources

Sequential Outlier Detection in Nonstationary Time Series

Journal of Time Series Analysis, EarlyView.
ABSTRACT A novel method for sequential outlier detection in nonstationary time series is proposed. The method tests the null hypothesis of “no outlier” at each time point, addressing the multiple testing problem by bounding the error probability of successive tests, using extreme‐value theory. The asymptotic properties of the test statistic are studied
Florian Heinrichs, Patrick Bastian, Holger Dette   +2 more
wiley   +1 more source

The Kullback–Leibler Divergence and the Convergence Rate of Fast Covariance Matrix Estimators in Galaxy Clustering Analysis

The Astrophysical Journal
We present a method to quantify the convergence rate of the fast estimators of the covariance matrices in the large-scale structure analysis. Our method is based on the Kullback–Leibler (KL) divergence, which describes the relative entropy of two ...
Zhigang Li, Zhejie Ding, Yu Yu, Pengjie Zhang   +3 more
doaj   +1 more source

A National-Scale Assessment of Bare-Nosed Wombat (<i>Vombatus ursinus</i>) Distribution Patterns, Using Multisource Data. [PDF]

Ecol Evol
We used public databases and citizen science data entered into WomSAT to model and predict the distribution of bare‐nosed wombats across Australia. ABSTRACT Current understanding of bare‐nosed wombat (Vombatus ursinus) distribution has focused on specific regions, and human–wombat issues (e.g., burrowing leading to undermining fence integrity and ...
Jiang Y, Spencer RJ, Stannard HJ, Old JM.   +3 more
europepmc   +2 more sources

Education and the Shadow Economy: A Panel Cointegration Analysis

Kyklos, EarlyView.
ABSTRACT This study examines the impact of education on the shadow economy across 132 countries over the period 1991–2020. To this end, panel cointegration and panel error‐correction models are employed. The results of the panel cointegration tests indicate a stable long‐term relationship among the selected variables.
Salvatore Ciucci
wiley   +1 more source

Panel Sequential Group Estimation of Interactive Effects Models

Oxford Bulletin of Economics and Statistics, EarlyView.
ABSTRACT This paper proposes a novel procedure to identify latent groups in the slopes of panel data models with interactive effects. The method is straightforward to apply and relies only on closed‐form estimators when evaluating the objective function.
Ignace De Vos, Joakim Westerlund
wiley   +1 more source

Arbuscular mycorrhizal fungal (AMF) communities in sand bars associated with Ipomoea pes‐caprae: a promising strategy for petroleum spill bioremediation in coastal dunes

Restoration Ecology, EarlyView.
Abstract Introduction Polycyclic aromatic hydrocarbons (PAHs), a class of petroleum‐derived compounds known for causing cellular damage and for their recalcitrant behavior, severely limit effective biodegradation. Arbuscular mycorrhizal fungi (AMF) from oil‐contaminated environments can mitigate PAH‐related stress on host plants, highlighting the ...
Ocimar F. de Andrade, Eliane S. de Souza, Camila P. Nobre, Fernanda de Avila Abreu, Manildo M. de Oliveira, Daniel B. Zandonadi, Victor B. Saraiva, Rodrigo L. Martins   +7 more
wiley   +1 more source

Bootstrap and Jackknife Resampling Methods in Survival Analysis of Patients with Thalassemia Major

مجله اپیدمیولوژی ایران, 2016
Background and Objectives: A small sample size can influence the results of statistical analysis. A reduction in the sample size may happen due to different reasons, such as loss of information, i.e. existing missing value in some variables.
R Ali Akbari Khoei, E Bakhshi, A Azarkeivan, A Biglarian   +3 more
doaj