Results 11 to 20 of about 1,000,634 (264)

Design of variable frequency dual transponder system for fixed point ranging

open access: yesElectronics Letters, 2023
Aiming at the problems of high system cost, complex ranging process, low ranging accuracy, and limited measurement distance in commonly used methods for ground fixed point distance measurement journals, a variable frequency microwave ranging system based
Guo Xiaoxu   +3 more
doaj   +1 more source

The Assumption of a Reliable Instrument and Other Pitfalls to Avoid When Considering the Reliability of Data

open access: yesFrontiers in Psychology, 2012
The purpose of this article is to help researchers avoid common pitfalls associated with reliability including incorrectly assuming that (a) measurement error always attenuates observed score correlations, (b) different sources of measurement error are ...
Kim eNimon   +2 more
doaj   +1 more source

Mid-infrared autocollimation for linear motion error measurement

open access: yesMeasurement: Sensors, 2021
It is known that linear motion errors for linear guides can be measured by the autocollimation method. In this case, it is necessary to install a mirror on the measurement target.
Hiraku Matsukuma   +4 more
doaj   +1 more source

Error modeling and analysis of alternating measurement mode roadheader positioning system

open access: yesGong-kuang zidonghua, 2022
The alternating measurement mode roadheader positioning technology will produce cumulative measurement error in the process of multiple alternating measurement, which will affect the positioning precision of roadheader.
LI Zhihai   +4 more
doaj   +1 more source

Lateral velocity measurement and error analysis

open access: yesThe Journal of Engineering, 2019
Most existing velocity measurement methods can only calculate the radial velocity by Doppler effect. Here, the authors study the method of measuring the lateral velocity.
Mengye Qiang, Yechao Bai, Xinggan Zhang
doaj   +1 more source

Measurement Error in Retrospective Work Histories

open access: yesSurvey Research Methods, 2014
Measurement error in retrospective reports of work status has been difficult to quantify in the past. Issues of confidentiality have made access to datasets linking survey responses to a valid administrative source very problematic.
Jose Pina Sánchez   +2 more
doaj   +1 more source

MEASUREMENT UNCERTAINTY IN LEGAL METROLOGY [PDF]

open access: yesRomanian Journal of Petroleum & Gas Technology, 2022
In legal metrology, in addition to the elements of the measurement result, the measurement uncertainty is also required in order to establish the level of confidence or risk regarding compliance decisions.
Bogdan-Gabriel Duță   +3 more
doaj   +1 more source

Measurement Error in Health Insurance Reporting

open access: yesInquiry: The Journal of Health Care Organization, Provision, and Financing, 2008
In the United States, surveys serve as the only source of data for the number of uninsured people; they also provide rich data for exploring the relationships between health insurance coverage and individuals' life circumstances, such as employment ...
Joanne Pascale
doaj   +1 more source

Omission Error Analysis in Gravity Gradient Measurement

open access: yesIEEE Access, 2018
Gravity gradient plays an important role in many fields of science, and many methods are used to achieve the measurement of it. To improve measurement accuracy, various error analyses have been conducted in previous studies about positioning and ...
Hongwei Wei   +4 more
doaj   +1 more source

Modeling measurement error in tumor characterization studies

open access: yesBMC Bioinformatics, 2011
Background Etiologic studies of cancer increasingly use molecular features such as gene expression, DNA methylation and sequence mutation to subclassify the cancer type.
Marjoram Paul   +4 more
doaj   +1 more source

Home - About - Disclaimer - Privacy