Relevant bibliographies by topics / Random measurement error

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Random measurement error'

Author: Grafiati
Published: 6 September 2023

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Journal articles on the topic "Random measurement error"

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Kroc, Edward. "Generalized measurement error: Intrinsic and incidental measurement error." PLOS ONE 18, no. 6 (2023): e0286680. http://dx.doi.org/10.1371/journal.pone.0286680.

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In this paper, we generalize the notion of measurement error on deterministic sample datasets to accommodate sample data that are random-variable-valued. This leads to the formulation of two distinct kinds of measurement error: intrinsic measurement error, and incidental measurement error. Incidental measurement error will be recognized as the traditional kind that arises from a set of deterministic sample measurements, and upon which the traditional measurement error modelling literature is based, while intrinsic measurement error reflects some subjective quality of either the measurement too
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Madan, Hennadii, Franjo Pernuš, and Žiga Špiclin. "Reference-free error estimation for multiple measurement methods." Statistical Methods in Medical Research 28, no. 7 (2018): 2196–209. http://dx.doi.org/10.1177/0962280217754231.

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We present a computational framework to select the most accurate and precise method of measurement of a certain quantity, when there is no access to the true value of the measurand. A typical use case is when several image analysis methods are applied to measure the value of a particular quantitative imaging biomarker from the same images. The accuracy of each measurement method is characterized by systematic error (bias), which is modeled as a polynomial in true values of measurand, and the precision as random error modeled with a Gaussian random variable. In contrast to previous works, the r
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Müller, Andreas Michael, and Tino Hausotte. "Analysis of the random measurement error of areal 3D coordinate measurements exclusively based on measurement repetitions." tm - Technisches Messen 88, no. 2 (2021): 71–77. http://dx.doi.org/10.1515/teme-2020-0087.

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Abstract The measurement uncertainty characteristics of a measurement system are an important parameter when evaluating the suitability of a certain measurement system for a specific measurement task. The measurement uncertainty can be calculated from observed measurement errors, which consist of both systematic and random components. While the unfavourable influence of systematic components can be compensated by calibration, random components are inherently not correctable. There are various measurement principles which are affected by different measurement error characteristics depending on
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Hutcheon, J. A., A. Chiolero, and J. A. Hanley. "Random measurement error and regression dilution bias." BMJ 340, jun23 2 (2010): c2289. http://dx.doi.org/10.1136/bmj.c2289.

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Leinonen, Jaakko, Eero Laakkonen, and Leila Laatikainen. "Random measurement error in visual acuity measurement in clinical settings." Acta Ophthalmologica Scandinavica 83, no. 3 (2005): 328–32. http://dx.doi.org/10.1111/j.1600-0420.2005.00469.x.

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Zhai, Xiaochun, Songhua Wu, Bingyi Liu, Xiaoquan Song, and Jiaping Yin. "Shipborne Wind Measurement and Motion-induced Error Correction of a Coherent Doppler Lidar over the Yellow Sea in 2014." Atmospheric Measurement Techniques 11, no. 3 (2018): 1313–31. http://dx.doi.org/10.5194/amt-11-1313-2018.

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Abstract. Shipborne wind observations by a coherent Doppler lidar (CDL) have been conducted to study the structure of the marine atmospheric boundary layer (MABL) during the 2014 Yellow Sea campaign. This paper evaluates uncertainties associated with the ship motion and presents the correction methodology regarding lidar velocity measurement based on modified 4-Doppler beam swing (DBS) solution. The errors of calibrated measurement, both for the anchored and the cruising shipborne observations, are comparable to those of ground-based measurements. The comparison between the lidar and radiosond
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Gertner, George Z. "The sensitivity of measurement error in stand volume estimation." Canadian Journal of Forest Research 20, no. 6 (1990): 800–804. http://dx.doi.org/10.1139/x90-105.

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A method is given for approximating and evaluating the consequences of random and nonrandom errors in the independent variables of a nonlinear tree volume function that is used in the estimation of stand volume based on a simple random sample of plots. Sampling error, regression function error, and measurement error are accounted for with the method presented. An application is given where relatively moderate amounts of measurement error in the independent variables of a tree volume function can cause a relatively large reduction in the accuracy of estimated stand volume.
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Zhou, Jun Wei, Lin He, and Rong Wu Xu. "Typical Errors Analysis in Frequency Response Function Measurement." Applied Mechanics and Materials 419 (October 2013): 470–76. http://dx.doi.org/10.4028/www.scientific.net/amm.419.470.

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FRF measurements can suffer from various errors. The effect of deterministic errors become more prominent compared to random errors in FRF measurement. Excitation and sensor misalignment is the most common source of deterministic error, so mathematic model is established and the effect on FRF estimation was analyzed for senor and excitation misalignment situations. Finite element model simulation reveals that misalignment error can have the least effect on the dominant FRFs and a stronger effect on lesser FRFs, beside that it also results in the appearance of false peaks in the measured FRFs.
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Rigdon, Edward E. "Demonstrating the effects of unmodeled random measurement error." Structural Equation Modeling: A Multidisciplinary Journal 1, no. 4 (1994): 375–80. http://dx.doi.org/10.1080/10705519409539986.

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Hasebe, Satoshi. "Random Measurement Error in Assessing Compensatory Ocular Countertorsion." Archives of Ophthalmology 121, no. 12 (2003): 1805. http://dx.doi.org/10.1001/archopht.121.12.1805.

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Dissertations / Theses on the topic "Random measurement error"

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Zhou, Tingxian, Xiaohua Yin, and Xianming Zhao. "A New Error Control Scheme for Remote Control System." International Foundation for Telemetering, 1994. http://hdl.handle.net/10150/611658.

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International Telemetering Conference Proceedings / October 17-20, 1994 / Town & Country Hotel and Conference Center, San Diego, California<br>How to rise the reliability of the data transmission is one of the main problem faced by modern digital communication designers. This paper studies the error-correcting codes being suitable for the channel existing both the random and burst error. A new error control scheme is given. The scheme is a concatenated coding system using an interleaved Reed-Solomon code with symbols over GF (24) as the outer code and a Viterbi-decoded convolutional code as th
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Häggström, Lundevaller Erling. "Tests of random effects in linear and non-linear models." Doctoral thesis, Umeå universitet, Statistik, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-15.

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Varughese, Suma. "A Study On Effects Of Phase - Amplitude Errors In Planar Near Field Measurement Facility." Thesis, Indian Institute of Science, 2000. https://etd.iisc.ac.in/handle/2005/231.

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Antenna is an indispensable part of a radar or free space communication system. Antenna requires different stringent specifications for different applications. Designed and fabricated for an intended application, antenna or antenna array has to be evaluated for its far-field characteristics in real free space environment which requires setting up of far-field test site. Maintenance of the site to keep the stray reflections levels low, the cost of the real estate are some of the disadvantages. Nearfield measurements are compact and can be used to test the antennas by exploiting the relations
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Varughese, Suma. "A Study On Effects Of Phase - Amplitude Errors In Planar Near Field Measurement Facility." Thesis, Indian Institute of Science, 2000. http://hdl.handle.net/2005/231.

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Antenna is an indispensable part of a radar or free space communication system. Antenna requires different stringent specifications for different applications. Designed and fabricated for an intended application, antenna or antenna array has to be evaluated for its far-field characteristics in real free space environment which requires setting up of far-field test site. Maintenance of the site to keep the stray reflections levels low, the cost of the real estate are some of the disadvantages. Nearfield measurements are compact and can be used to test the antennas by exploiting the relationshi
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Bručas, Domantas. "Geodezinių kampų matavimo prietaisų kalibravimo įrangos kūrimas ir tyrimas." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2008. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20080620_092018-51641.

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Disertacijoje nagrinėjamos geodezinių kampus matuojančių prietaisų patikros bei kalibravimo metodai bei priemonės. Pagrindinis tyrimo objektas yra geodezinių prietaisų tikslumo parametrų matavimo būdų ir priemonių analizė, kalibravimo įrenginio kūrimas, jo tikslumo charakteristikų tyrimas bei įrenginio tobulinimas. Šie objektai yra svarbūs vykdant geodezinių prietaisų kalibravimą, kas savo ruožtu yra labai svarbu užtikrinant reikiamą šių prietaisų matavimų tikslumą geodezijoje, statybose, mašinų gamyboje ir t. t. Pagrindinis disertacijos tikslas – geodezinių kampų matavimo prietaisų kalibravim
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Olson, Brent. "Evaluating the error of measurement due to categorical scaling with a measurement invariance approach to confirmatory factor analysis." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/332.

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It has previously been determined that using 3 or 4 points on a categorized response scale will fail to produce a continuous distribution of scores. However, there is no evidence, thus far, revealing the number of scale points that may indeed possess an approximate or sufficiently continuous distribution. This study provides the evidence to suggest the level of categorization in discrete scales that makes them directly comparable to continuous scales in terms of their measurement properties. To do this, we first introduced a novel procedure for simulating discretely scaled data that was both i
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Bručas, Domantas. "Development and research of the test bench for the angle calibration of geodetic instruments." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2008. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20080620_092300-91259.

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The main idea of current PhD thesis is an accuracy analysis of testing and calibration of geodetic instruments. The object of investigation is an analysis of means and methods for testing and calibration of geodetic instruments for plane angle measurement, development of such calibration equipment, its accuracy investigation and the research of its accuracy increasing possibilities. These objects are important for successful testing or calibration of geodetic instruments for angle measuring which is essential in ensuring the precision of measurements taken in surveying, construction, mechanica
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Wang, Ziyang. "Next Generation Ultrashort-Pulse Retrieval Algorithm for Frequency-Resolved Optical Gating: The Inclusion of Random (Noise) and Nonrandom (Spatio-Temporal Pulse Distortions) Error." Diss., Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-04122005-224257/unrestricted/wang%5Fziyang%5F200505%5Fphd.pdf.

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Thesis (Ph. D.)--Physics, Georgia Institute of Technology, 2005.<br>You, Li, Committee Member ; Buck, John A., Committee Member ; Kvam, Paul, Committee Member ; Kennedy, Brian, Committee Member ; Trebino, Rick, Committee Chair. Vita. Includses bibliographical references.
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Zhong, Shan. "Measurement calibration/tuning & topology processing in power system state estimation." Texas A&M University, 2003. http://hdl.handle.net/1969.1/1595.

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State estimation plays an important role in modern power systems. The errors in the telemetered measurements and the connectivity information of the network will greatly contaminate the estimated system state. This dissertation provides solutions to suppress the influences of these errors. A two-stage state estimation algorithm has been utilized in topology error identification in the past decade. Chapter II discusses the implementation of this algorithm. A concise substation model is defined for this purpose. A friendly user interface that incorporates the two-stage algorithm into the conve
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Bassani, N. P. "STATISTICAL METHODS FOR THE ASSESSMENT OF WITHIN-PLAFORM REPEATABILITY AND BETWEEN-PLATFORM AGREEMENT IN MICRORNA MICROARRAY TECHNOLOGIES." Doctoral thesis, Università degli Studi di Milano, 2013. http://hdl.handle.net/2434/215072.

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Over the last years miRNA microarray platforms have provided great insights in the biological mechanisms underlying onset and development of several diseases such as tumours and chronic pathologies. However, only a few studies have evaluated reliability and concordance of these technologies, mostly by using improper statistical methods. In this project we have studied performance of three different miRNA microarray platforms (Affymetrix, Agilent and Illumina) in terms of their within-platform repeatability by means of a of random-effects model to assess contribution to overall variability fro
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Books on the topic "Random measurement error"

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Srivastava, M. S. Economical on-line quality control procedures based on normal random walk model with measurement error. University of Toronto, Dept. of Statistics, 1993.

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Fearon, James D., and David D. Laitin. Integrating Qualitative and Quantitative Methods. Edited by Janet M. Box-Steffensmeier, Henry E. Brady, and David Collier. Oxford University Press, 2009. http://dx.doi.org/10.1093/oxfordhb/9780199286546.003.0033.

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This article describes how qualitative and quantitative tools can be used jointly to strengthen causal inference. It first outlines the findings of statistical analysis of civil war onsets. It then addresses the different criteria for choosing which narratives to tell. A method for structuring narratives that is complementary to the statistical work is reported. Next, the article shows in light of narrative findings the incompleteness of the statistical models that are initially ran. One narrative is emphasized as an example of its potential yield. It underlines some surprises and advantages o
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Halperin, Sandra, and Oliver Heath. 11. Surveys. Oxford University Press, 2017. http://dx.doi.org/10.1093/hepl/9780198702740.003.0011.

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This chapter discusses the principles of survey research as well as the issues and problems associated with different stages of the research design process. In particular, it examines questionnaire design, sample design, and interviewing techniques, along with the common sources of error that affect survey research and what can be done to try and avoid or minimize them. Although surveys have several weaknesses, they are widely used in political research to investigate a wide range of political phenomena. They combine two things: obtaining information from people by asking questions and random
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Ślusarski, Marek. Metody i modele oceny jakości danych przestrzennych. Publishing House of the University of Agriculture in Krakow, 2017. http://dx.doi.org/10.15576/978-83-66602-30-4.

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The quality of data collected in official spatial databases is crucial in making strategic decisions as well as in the implementation of planning and design works. Awareness of the level of the quality of these data is also important for individual users of official spatial data. The author presents methods and models of description and evaluation of the quality of spatial data collected in public registers. Data describing the space in the highest degree of detail, which are collected in three databases: land and buildings registry (EGiB), geodetic registry of the land infrastructure network
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Book chapters on the topic "Random measurement error"

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Mellenbergh, Gideon J. "Random Measurement Error." In Counteracting Methodological Errors in Behavioral Research. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-12272-0_7.

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Cooper, Colin. "Random Errors of Measurement." In An Introduction to Psychometrics and Psychological Assessment, 2nd ed. Routledge, 2023. http://dx.doi.org/10.4324/9781003240181-7.

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Zong, Siheng. "Similar Formation Problem with Biased Random Measurement Errors." In Proceedings of 2021 5th Chinese Conference on Swarm Intelligence and Cooperative Control. Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-3998-3_36.

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Giovagnoli, A., and L. Martino. "Optimal Sampling Design with Random Size Clusters for a Mixed Model with Measurement Errors." In Nonconvex Optimization and Its Applications. Springer US, 2001. http://dx.doi.org/10.1007/978-1-4757-3419-5_17.

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Rivera-Campoverde, Néstor, José Muñoz Sanz, and Blanca Arenas-Ramirez. "Low-Cost Model for the Estimation of Pollutant Emissions Based on GPS and Machine Learning." In Proceedings of the XV Ibero-American Congress of Mechanical Engineering. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-38563-6_27.

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AbstractThis paper presents a novel method for estimating pollutants emitted by vehicles powered by internal combustion engines in real driving, without the need for extensive measurement campaigns or the use of instrumentation in the vehicle for long periods of time; for which it is based on the positioning and speed signals generated by the GPS (Global Positioning System) and the machine learning application. To obtain the training data and validation of the model, two road tests are carried out using the Euro 6 directives for the estimation of pollutants through RDE (Real Driving Emissions), in which a portable emission measurement system is used, and a recorder that stores data from OBD (On Board Diagnostics) and GPS. Based on the data obtained in the first route, the vehicle’s performance is determined and, through automatic learning, the model that estimates polluting emissions is generated, which is validated with the data from the second route. When comparing the results generated by the model against those measured in the RDE, relative errors (%) of 0.0976, −0.2187, 0.2249 and −0.1379 are obtained in the emission factors of CO2, CO, HC and NOx respectively. Finally, the model is fed with data obtained in 1218 km of random driving, obtaining similar results to models based on OBD and closer to the real driving conditions generated by models such as the IVE (International Vehicle Emissions).
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Albert, Paul S., Rajeshwari Sundaram, and Alexander C. McLain. "Innovative Applications of Shared Random Parameter Models for Analyzing Longitudinal Data Subject to Dropout." In ISS-2012 Proceedings Volume On Longitudinal Data Analysis Subject to Measurement Errors, Missing Values, and/or Outliers. Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-6871-4_7.

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Pavlopoulos, Dimitris, Paulina Pankowska, Bart Bakker, and Daniel Oberski. "Modelling Error Dependence in Categorical Longitudinal Data." In Measurement Error in Longitudinal Data. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198859987.003.0008.

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Hidden Markov models (HMMs) offer an attractive way of accounting and correcting for measurement error in longitudinal data as they do not require the use of a ‘gold standard’ data source as a benchmark. However, while the standard HMM assumes the errors to be independent or random, some common situations in survey and register data cause measurement error to be systematic. HMMs can correct for systematic error as well if the local independence assumption is relaxed. In this chapter, we present several (mixed) HMMs that relax this assumption with the use of two independent indicators for the variable of interest. Finally, we illustrate the results of some of these HMMs with the use of an example of employment mobility. For this purpose, we use linked survey-register data from the Netherlands.
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Biemer, Paul P., Kathleen Mullan Harris, Dan Liao, Brian J. Burke, and Carolyn Tucker Halpern. "Modelling Mode Effects for a Panel Survey in Transition." In Measurement Error in Longitudinal Data. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198859987.003.0004.

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Funding reductions combined with increasing data-collection costs required that Wave V of the USA’s National Longitudinal Study of Adolescent to Adult Health (Add Health) abandon its traditional approach of in-person interviewing and adopt a more cost-effective method. This approach used the mail/web mode in Phase 1 of data collection and in-person interviewing for a random sample of nonrespondents in Phase 2. In addition, to facilitate the comparison of modes, a small random subsample served as the control and received the traditional in-person interview. We show that concerns about reduced data quality as a result of the redesign effort were unfounded based on findings from an analysis of the survey data. In several important respects, the new two-phase, mixed-mode design outperformed the traditional design with greater measurement accuracy, improved weighting adjustments for mitigating the risk of nonresponse bias, reduced residual (or post-adjustment) nonresponse bias, and substantially reduced total-mean-squared error of the estimates. This good news was largely unexpected based upon the preponderance of literature suggesting data quality could be adversely affected by the transition to a mixed mode. The bad news is that the transition comes with a high risk of mode effects for comparing Wave V and prior wave estimates. Analytical results suggest that significant differences can occur in longitudinal change estimates about 60 % of the time purely as an artifact of the redesign. This begs the question: how, then, should a data analyst interpret significant findings in a longitudinal analysis in the presence of mode effects? This chapter presents the analytical results and attempts to address this question.
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Ahmad, Rauf, and Silvelyn Zwanzig. "On Total Least Squares Estimation for Longitudinal Errors-in-Variables Models." In Measurement Error in Longitudinal Data. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198859987.003.0015.

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The objective of this study is to evaluate the total least squares (TLS) estimator for the linear mixed model when the design matrix is subject to measurement errors, with special focus on models for longitudinal or repeated-measures data. We consider measurement errors only in the design matrix concerning the fixed part of the model and estimate its corresponding parameter vector under the TLS set up. After treating two variants of the general case, the random coefficient model is discussed as a special case. We evaluate conditions, on the design matrices as well as on variance component parameters, under which a reasonable TLS estimator can be expected in such models. Analysis of a real data example is also provided.
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Paccagnella, Omar. "Self-Evaluation, Differential Item Functioning, and Longitudinal Anchoring Vignettes." In Measurement Error in Longitudinal Data. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198859987.003.0012.

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Anchoring vignettes are a powerful instrument to detect systematic differences in the use of self-reported ordinal survey responses. Not taking into account the (non-random) heterogeneity in reporting styles across different respondents may systematically bias the measurement of the variables of interest. The presence of such individual heterogeneity leads respondents to interpret, understand, or use the response categories for the same question differently. This phenomenon is defined as differential item functioning (DIF) in the psychometric literature. A growing amount of cross-sectional studies apply the anchoring vignette approach to tackle this issue but its use is still limited in the longitudinal context. This chapter introduces longitudinal anchoring vignettes for DIF correction, as well as the statistical approaches available when working with such data and how to investigate stability over time of individual response scales.
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Conference papers on the topic "Random measurement error"

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Yun, Xu, Zhu Xinhua, and Wang Yu. "Error Compensation for MIMU under Random Vibration." In 2013 Third International Conference on Instrumentation, Measurement, Computer, Communication and Control (IMCCC). IEEE, 2013. http://dx.doi.org/10.1109/imccc.2013.237.

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Wallis, T. Mitch, Atif Imtiaz, Sang-Hyun Lim, et al. "Broadband measurements of nanofiber devices: Repeatability and random error analysis." In 2010 76th ARFTG Microwave Measurement Conference. IEEE, 2010. http://dx.doi.org/10.1109/arftg76.2010.5700058.

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Wang, Zezhou, Yunxiang Chen, Zhongyi Cai, and Tao Wang. "Remaining Useful Lifetime Estimation with Random Failure Threshold and Measurement Error." In 2018 Prognostics and System Health Management Conference (PHM-Chongqing). IEEE, 2018. http://dx.doi.org/10.1109/phm-chongqing.2018.00089.

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Loboda, Igor, Sergiy Yepifanov, and Yakov Feldshteyn. "A More Realistic Scheme of Deviation Error Representation for Gas Turbine Diagnostics." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-69368.

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Gas turbine diagnostic algorithms widely use fault simulation schemes, in which measurement errors are usually given by theoretical random number distributions, like the Gaussian probability density function. The scatter of simulated noise is determined on the basis of known information on maximum errors for every sensor type. Such simulation differs from real diagnosis because instead of measurements themselves the diagnostic algorithms work with their deviations from an engine baseline. In addition to simulated measurement inaccuracy, the deviations computed for real data have other error co
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Rahman, Nahid, Ana I. Medina Ayala, Konstantin A. Korolev, Mohammed N. Afsar, Rudy Cheung, and Maurice Aghion. "Random and systematic error analysis in the complex permittivity measurements of high dielectric strength thermoplastics." In 2009 IEEE Intrumentation and Measurement Technology Conference (I2MTC). IEEE, 2009. http://dx.doi.org/10.1109/imtc.2009.5168705.

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Goncharov, Nikita V., and Yuri V. Filatov. "Influence of the rotor rotation rate instability on goniometer's random error of measurement." In SPIE Proceedings, edited by Vadim E. Privalov. SPIE, 2007. http://dx.doi.org/10.1117/12.725595.

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Peng, Zhang. "A method for the measurement and analysis of SAR signal random phase error." In 2009 2nd Asian-Pacific Conference on Synthetic Aperture Radar (APSAR). IEEE, 2009. http://dx.doi.org/10.1109/apsar.2009.5374317.

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Cai, Zhongyi, Zezhou Wang, Xiaoxiong Dong, Lili Wang, and Huachun Xiang. "Remaining Useful Lifetime Prediction of Nonlinear System with Random Effect and Measurement Error." In 2018 Prognostics and System Health Management Conference (PHM-Chongqing). IEEE, 2018. http://dx.doi.org/10.1109/phm-chongqing.2018.00087.

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Zhang, Yanshun, and Jiancheng Fang. "Research on the random error modeling and compensation method for MEMS gyro." In Sixth International Symposium on Instrumentation and Control Technology: Sensors, Automatic Measurement, Control, and Computer Simulation, edited by Jiancheng Fang and Zhongyu Wang. SPIE, 2006. http://dx.doi.org/10.1117/12.717648.

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Etebari, Ali, and Pavlos P. Vlachos. "Application of Higher-Order Compact Finite Difference Schemes to Out of Plane Vorticity Measurements." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-55344.

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The accuracy of out-of-plane vorticity from in-plane experimental velocity measurements is investigated with particular application to Digital Particle Image Velocimetry (DPIV). Higher-order compact finite difference schemes are proposed as alternatives for the vorticity estimation. Simulations of known flow fields are used to quantify errors associated with the different methods of estimation. The effects of spatial sampling resolution with respect to the range of flow scales on the bias errors of the method accuracies are explored. In addition, estimation of the velocity measurement random e
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Reports on the topic "Random measurement error"

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Haines, Tomar. PR-218-103608-R01 ILI Tool Calibration based on In-ditch Measurement with Related Uncertainty. Pipeline Research Council International, Inc. (PRCI), 2013. http://dx.doi.org/10.55274/r0010825.

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Keifner and Associates was awarded task 2 and 3 of the project EC-4-2, "ILI Tool Calibration based on In-ditch Measurement with Related Uncertainty". The project comprised of three tasks as follows: Develop a process for either confirming adequacy of vendor claimed random error component, or recalibrating the random error component of ILI measurement uncertainty. Task 1 was completed by ApplusRTD and a report was generated under a separate contract no: PR-366-103606. Develop a process for examining errors, and determine methods to correct for these errors, recognizing that lack of knowledge ab
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Almås, Ingvild, Orazio Attanasio, Jyotsna Jalan, Francisco Oteiza, and Marcella Vigneri. Using data differently and using different data. Centre for Excellence and Development Impact and Learning (CEDIL), 2018. http://dx.doi.org/10.51744/cip8.

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The lack of adequate measures to capture relevant factors, and the prevalence of measurement error in existing ones, often constitute the main impediment to robust policy evaluation. Random assignment of a given treatment, when feasible, may allow for the identification of causal effects, given that the necessary measurements are available. Measurement challenges include: (a) adequately measuring outcomes of interest; (b) measuring factors that relate to the mechanisms of estimated impacts; and (c) conducting a robust evaluation in areas where the RCT methodology is not feasible. In this paper
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Lines, Lisa M., Marque C. Long, Jamie L. Humphrey, et al. Artificially Intelligent Social Risk Adjustment: Development and Pilot Testing in Ohio. RTI Press, 2022. http://dx.doi.org/10.3768/rtipress.2022.rr.0047.2209.

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Prominent voices have called for a better way to measure, predict, and adjust for social factors in healthcare and population health. Local area characteristics are sometimes framed as a proxy for patient characteristics, but they are often independently associated with health outcomes. We have developed an “artificially intelligent” approach to risk adjustment for local social determinants of health (SDoH) using random forest models to understand life expectancy at the Census tract level. Our Local Social Inequity score draws on more than 150 neighborhood-level variables across 10 SDoH domain
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Koduru, Smitha, and Jason Skow. PR-244-153719-R01 Quantification of ILI Sizing Uncertainties and Improving Correction Factors. Pipeline Research Council International, Inc. (PRCI), 2018. http://dx.doi.org/10.55274/r0011518.

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Operators routinely perform verification digs to assess whether an inline inspection (ILI) tool meets the performance specified by the ILI vendors. Characterizing the actual ILI tool performance using available field and ILI data is a difficult problem due to uncertainties associated with measurements and geometric classification of features. The focus of this project is to use existing ILI and excavation data to develop better approaches for assessing ILI tool performance. For corrosion features, operators are primarily interested in quantifying magnetic flux leakage (MFL) ILI tool sizing err
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Hodgdon, Taylor, Anthony Fuentes, Brian Quinn, Bruce Elder, and Sally Shoop. Characterizing snow surface properties using airborne hyperspectral imagery for autonomous winter mobility. Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/42189.

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With changing conditions in northern climates it is crucial for the United States to have assured mobility in these high-latitude regions. Winter terrain conditions adversely affect vehicle mobility and, as such, they must be accurately characterized to ensure mission success. Previous studies have attempted to remotely characterize snow properties using varied sensors. However, these studies have primarily used satellite-based products that provide coarse spatial and temporal resolution, which is unsuitable for autonomous mobility. Our work employs the use of an Unmanned Aeriel Vehicle (UAV)
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