Results 71 to 80 of about 91,156 (303)

Local partial-likelihood estimation for lifetime data

open access: yes, 2006
This paper considers a proportional hazards model, which allows one to examine the extent to which covariates interact nonlinearly with an exposure variable, for analysis of lifetime data.
Fan, Jianqing, Lin, Huazhen, Zhou, Yong
core   +2 more sources

Local asymptotic normality for multivariate linear processes

open access: yesStochastic Processes and their Applications, 1994
Let \(\{x_ t\}\) be i.i.d. \(d\)-dimensional random vectors and \(\{\gamma_ j\}\) \(d \times d\) nonrandom matrices. The author considers a linear process \(y_ t=\sum^ \infty_{j=0} \gamma_ j x_{t-j}\). Local asymptotic normality (LAN) is established for the likelihood ratios for the distribution of \((x_ j:j \leq 0\), \(y_ 1,\dots,y_ n)\).
openaire   +2 more sources

The Impact of Self‐Checkout Technology on Shopping Behavior in B2B Retail: Evidence From Point‐Of‐Sale Transaction Data

open access: yesJournal of Consumer Behaviour, EarlyView.
ABSTRACT This study examines the impact of self‐checkout technology implementation on B2B customer shopping behavior using a novel methodological approach that combines propensity score matching with difference‐in‐differences analysis on actual point‐of‐sale transaction data.
Jindřich Špička   +1 more
wiley   +1 more source

Local bilinear multiple-output quantile/depth regression

open access: yes, 2015
A new quantile regression concept, based on a directional version of Koenker and Bassett's traditional single-output one, has been introduced in [Ann. Statist. (2010) 38 635-669] for multiple-output location/linear regression problems.
Hallin, Marc   +3 more
core   +1 more source

The Filament Extension Atomization Process for Powder Production of Elastic Fluids

open access: yesChemie Ingenieur Technik, EarlyView.
Filament extension atomization is a promising technique for spraying a wide range of materials, enabling narrow droplet size distributions. This study examines the behavior of various fluids and suspensions to define application limits and identify optimal operating conditions.
Moritz Neukötter   +4 more
wiley   +1 more source

Optimal model‐based design of experiments for parameter precision: Supercritical extraction case

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Abstract This study investigates the process of chamomile oil extraction from flowers. A parameter‐distributed model consisting of a set of partial differential equations is used to describe the governing mass transfer phenomena in a cylindrical packed bed with solid chamomile particles under supercritical conditions using carbon dioxide as a solvent ...
Oliwer Sliczniuk, Pekka Oinas
wiley   +1 more source

Local Linear Regression for Functional Ergodic Data with Missing at Random Responses

open access: yesMathematics
In this article, we develop a novel kernel-based estimation framework for functional regression models in the presence of missing responses, with particular emphasis on the Missing At Random (MAR) mechanism.
Yassine Baghli   +2 more
doaj   +1 more source

Carbon monoxide adsorption on NaY zeolite and impregnated with 5% niobium: Characteristics and fixed‐bed study

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Schematic of the CO adsorption process in a fixed‐bed column containing pure NaY zeolite and Nb‐modified NaY (NaY–5%Nb). On the left, breakthrough curves and temperature profiles highlight the dynamic performance and thermal effects during CO adsorption.
Elson Oliveira   +3 more
wiley   +1 more source

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