Results 11 to 20 of about 749,885 (297)

A Successive Approximation Time-to-Digital Converter with Single Set of Delay Lines for Time Interval Measurements

open access: yesSensors, 2019
The paper is focused on design of time-to-digital converters based on successive approximation (SA-TDCs—Successive Approximation TDCs) using binary-scaled delay lines in the feedforward architecture. The aim of the paper is to provide a tutorial on
Jakub Szyduczyński   +2 more
doaj   +1 more source

An automatic multichannel generalized system for frequency measurement

open access: yesInternational Journal of Metrology and Quality Engineering, 2015
Monitoring the performance of the primary frequency sources continuously through comparing it versus the transfer standards and the calibration of the secondary frequency sources periodically versus the primary ones are of the main missions assigned to ...
Gomah G., Mostafa A.
doaj   +1 more source

Measuring Electromechanical Coupling in Patients with Coronary Artery Disease and Healthy Subjects

open access: yesEntropy, 2016
Coronary artery disease (CAD) is the most common cause of death globally. To detect CAD noninvasively at an early stage before clinical symptoms occur is still nowadays challenging. Analysis of the variation of heartbeat interval (RRI) opens a new avenue
Lizhen Ji   +5 more
doaj   +1 more source

Stabilization for switched linear systems: Hybrid observer‐based method

open access: yesIET Control Theory & Applications, 2021
This paper investigates interval observer‐based controller design for switched linear systems involving additional disturbance and measurement noise, whose modes need not to be cooperative.
Zhihui Li, Yue‐E Wang, Di Wu
doaj   +1 more source

Data Representation Based on Interval-Sets for Anomaly Detection in Time Series

open access: yesIEEE Access, 2018
Anomaly detection in time series is a popular topic focusing on a variety of applications, which achieves a wealth of results. However, there are many cases of missing anomaly and increased false alarm in most of the existing works.
Huorong Ren   +3 more
doaj   +1 more source

Estimation of the optimal statistical quality control sampling time intervals using a residual risk measure. [PDF]

open access: yesPLoS ONE, 2009
BACKGROUND:An open problem in clinical chemistry is the estimation of the optimal sampling time intervals for the application of statistical quality control (QC) procedures that are based on the measurement of control materials.
Aristides T Hatjimihail
doaj   +1 more source

Measurable maximal energy and minimal time interval [PDF]

open access: yesCanadian Journal of Physics, 2014
The possibility of finding the measurable maximal energy and the minimal time interval is discussed in different quantum aspects. It is found that the linear generalized uncertainty principle (GUP) approach gives a nonphysical result. Based on large scale Schwarzschild solution, the quadratic GUP approach is utilized. The calculations are performed at
Dahab, Eiman Abou El   +1 more
openaire   +2 more sources

Frequency Instability Measurement Device Based on the Pulse Coincidence Principle

open access: yesVìsnik Nacìonalʹnogo Tehnìčnogo Unìversitetu Ukraïni Kììvsʹkij Polìtehnìčnij Ìnstitut: Serìâ Radìotehnìka, Radìoaparatobuduvannâ, 2019
Context. The task of rapid and accurate measurement of the dynamic characteristics of modern signal sources with a frequency output, in particular, the short-time frequency instability function, calls for refining measurement techniques with account of ...
A. I. Verveyko   +3 more
doaj   +1 more source

Measurement of Event-Related Brain Potentials (ERP) Amplitude and Latency Based on Digital Stochastic Measurement over Interval

open access: yesElektronika ir Elektrotechnika, 2020
In this paper, the measurement of event-related brain potentials (ERP) amplitude and latency based on digital stochastic measurement over interval (DSMI) method are described. Different variations of the measurement system are considered.
Djordje Novakovic   +5 more
doaj   +1 more source

Conventional QT variability measurement vs. template matching techniques: comparison of performance using simulated and real ECG.

open access: yesPLoS ONE, 2012
Increased beat-to-beat variability in the QT interval (QTV) of ECG has been associated with increased risk for sudden cardiac death, but its measurement is technically challenging and currently not standardized.
Mathias Baumert   +2 more
doaj   +1 more source

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