Results 111 to 120 of about 143,710 (291)

On Hitting Times for Markov Time Series of Counts with Applications to Quality Control

open access: yesRevstat Statistical Journal, 2016
Examples of time series of counts arise in several areas, for instance in epidemiology, industry, insurance and network analysis. Several time series models for these counts have been proposed and some are based on the binomial thinning operation ...
Manuel Cabral Morais , António Pacheco
doaj   +1 more source

PolyGraph – Flexible, Biocompatible & Electrically Optimized Graphene‐Polymer Composites for Next‐Generation Neural Interfaces

open access: yesAdvanced Healthcare Materials, EarlyView.
PolyGraph, a flexible graphene‐polycaprolactone nanocomposite, unites conductivity, biocompatibility, and processability for next‐generation neural interfaces. Fabricated into microneedle arrays with ultra‐flexible backings, PolyGraph enables bidirectional neuronal recording and stimulation in brain tissue, advancing brain‐computer interface (BCI) and ...
Jack Maughan   +12 more
wiley   +1 more source

Respiratory Organ‐on‐a‐Chip for Disease Modeling: From Architecture to Functional Integration

open access: yesAdvanced Healthcare Materials, EarlyView.
Respiratory organ‐on‐a‐chip (ROC) models capture key mechanical and cellular cues of the human respiratory system, enabling quantitative dissection of disease mechanisms. This review links ROC architectures to disease modeling, functional integration, and commercialization, and proposes a decision framework that aligns model complexity with mechanistic
Jinzhuo Hu   +4 more
wiley   +1 more source

Stochastic inventory control model with two stages in ordering process

open access: yesJournal of Business Economics and Management, 2006
The purpose of offered work is the construction of a stochastic single‐product inventory control model for the chain “producer – wholesaler – customer”. Given situation takes place in many transport and industrial companies.
Eugene Kopytov   +2 more
doaj   +1 more source

The Maximum Entropy Distribution for Stochastically Ordered Random Variables with Fixed Marginals [PDF]

open access: yes
Stochastically ordered random variables with given marginal distributions are combined into a joint distribution preserving the ordering and the marginals using a maximum entropy formulation. A closed-form expression is obtained.
Kiefer, Nicholas M.
core  

Variance stochastic orders [PDF]

open access: yesJournal of Mathematical Economics, 2019
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +3 more sources

Intelligent Acousto‐Electrical Metamaterials (IAM) for Sound Source Detection

open access: yesAdvanced Materials, EarlyView.
Our proposed metamaterial concept enables sound source detection using a single material, in contrast to conventional arrays that require dozens or even hundreds of transducers. We show that the coupled acoustic–vibrational–electrical responses in piezoelectric metamaterials give rise to topology‐governed charge transport, producing distinct voltage ...
Victor Couëdel   +7 more
wiley   +1 more source

Dynamic Inventory Planning with Unknown Costs and Stochastic Demand

open access: yesInternational Journal of Industrial Engineering and Production Research, 2016
Generally ordering policies are done by two methods, including fix order quantity (FOQ) and fix order period (FOP). These methods are static and either the quantity of ordering or the procedure of ordering is fixing in throughout time horizon.
Ramin Sadeghian
doaj  

Stochastic order inequalities for systems with standby units and parallel-series configurations

open access: yesJournal of Inequalities and Applications
In this paper, we first consider stochastic orderings of lifetimes of series and parallel systems with cold standby units. The strategy is to find out whether the reliability of a series or parallel system improves when standby units are installed on the
Mashael A. Alshehri, M. Kayid
doaj   +1 more source

On mixture failure rate ordering [PDF]

open access: yes
Mixtures of increasing failure rate distributions (IFR) can decrease at least in some intervals of time. Usually this property can be observed asymptotically as time tends to infinity.
Maxim S. Finkelstein, Veronica Esaulova
core  

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