Results 11 to 20 of about 384,701 (284)

Monitored Tomographic Reconstruction—An Advanced Tool to Study the 3D Morphology of Nanomaterials

open access: yesNanomaterials, 2021
Detailed and accurate three-dimensional (3D) information about the morphology of hierarchically structured materials is derived from multi-scale X-ray computed tomography (XCT) and subsequent 3D data reconstruction.
Konstantin Bulatov   +7 more
doaj   +1 more source

Reliability of an engineering system characterized by hot and cold standby: A compound boundary value problem [PDF]

open access: yesYugoslav Journal of Operations Research, 2021
We analyse the reliability (survival function) of a duplex system characterized by hot standby and sustained by an auxiliary unit in cold standby. The entire system is attended by two heterogeneous repairmen.
Vanderperre Edmond, Makhanov Stanislav
doaj   +1 more source

A Stopping Rule for Simulation‑Based Estimation of Inclusion Probabilities

open access: yesActa Universitatis Lodziensis. Folia Oeconomica, 2020
Design‑based estimation of finite population parameters such as totals usually relies on the knowledge of inclusion probabilities characterising the sampling design. They are directly incorporated into sampling weights and estimators.
Wojciech Gamrot
doaj   +1 more source

Finite nucleos(t)ide analogue therapy in hepatitis B e antigen‐negative chronic hepatitis B: From an “option” to an “active recommendation”

open access: yesKaohsiung Journal of Medical Sciences, 2022
Nucleos(t)ide analogue (Nuc) including entecavir, tenofovir disoproxil fumarate, and tenofovir alafenamide may suppress hepatitis B virus (HBV) DNA profoundly but have no direct action on covalently closed circular DNA, which is a very stable template ...
Yun‐Fan Liaw, Rong‐Nan Chien
doaj   +1 more source

On rules for stopping the conjugate gradient type methods in ill‐posed problems

open access: yesMathematical Modelling and Analysis, 2007
We consider stopping rules in conjugate gradient type iteration methods for solving linear ill‐posed problems with noisy data. The noise level may be known exactly or approximately or be unknown. We propose several new stopping rules, mostly for the case
Uno Hämarik, Reimo Palm
doaj   +1 more source

Timing and spatial selection bias in rapid extreme event attribution

open access: yesWeather and Climate Extremes, 2023
Selection bias may arise when data have been chosen in a way that subsequent analysis does not account for. Such bias can arise in climate event attribution studies that are performed rapidly after a devastating “trigger event”, whose occurrence ...
Ophélia Miralles, Anthony C. Davison
doaj   +1 more source

Improved Sequential Stopping Rule for Monte Carlo Simulation [PDF]

open access: yes, 2008
This paper presents an improved result on the negative-binomial Monte Carlo technique analyzed in a previous paper for the estimation of an unknown probability p.
Hernando, Jose M., Mendo, Luis
core   +3 more sources

Optimal Save-Then-Transmit for Random Energy Harvesting Communications: An Optimal Stopping Approach

open access: yesIEEE Access, 2017
Energy harvesting (EH) from renewable energy sources is more environmental friendly and convenient than the conventional energy supplies. This paper considers a point-to-point channel with the transmitter powered by random energy harvester, for which the
Linsong Du, Qiang Li, Chuan Huang
doaj   +1 more source

A new strategy for Robbins' problem of optimal stopping [PDF]

open access: yes, 2016
In this article we study the expected rank problem under full information. Our approach uses the planar Poisson approach from Gnedin (2007) to derive the expected rank of a stopping rule that is one of the simplest non-trivial examples combining rank ...
Meier, Martin, Sögner, Leopold
core   +3 more sources

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