Results 31 to 40 of about 207,324 (261)

Robust Estimation of Reduced Rank Models to Large Spatial Datasets

open access: yesRevstat Statistical Journal, 2020
For large datasets, spatial covariances are often modeled using basis functions and covariance of a reduced dimensional latent spatial process. For skewed data, likelihood based approaches with Gaussian assumption may not lead to faithful inference. Any
Casey M. Jelsema   +2 more
doaj   +1 more source

Comparison of noise estimation methods used in denoising 99mTc-sestamibi parathyroid images using wavelet transform

open access: yesWorld Journal of Nuclear Medicine, 2021
The objective of this study was to compare the performance of variance, median absolute deviation, and the square of median absolute deviation methods of noise estimation in denoising of 99mTc-sestamibi parathyroid images using wavelet transform.
Anil Pandey   +4 more
doaj   +1 more source

The impact of data normalization on 2D coordinate transformation using GRNN [PDF]

open access: yesGeodetski Vestnik, 2019
The coordinate transformation has always been a hot topic in the field of geodesy. The artificial neural network (ANN) has been used as an alternative tool to determine the relationship between any two coordinate systems.
Leyla Cakir, Berkant Konakoglu
doaj   +1 more source

Bahadur representations for the median absolute deviation and its modifications [PDF]

open access: yesStatistics & Probability Letters, 2009
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Mazumder, Satyaki, Serfling, Robert
openaire   +1 more source

The mean and median absolute deviations

open access: yesMathematical and Computer Modelling, 2001
The authors give a comprehensive survey of properties of mean and median absolute deviations of a distribution. Let \(X_1,X_2,\dots, X_n\) be independent and identically distributed random variables and \(\overline X_n\) be the sample mean. Let \(S^2_n= n^{-1} \sum^n_{i=1} (X_i- \overline X_n)^2\) and \(d_n= n^{-1} \sum^n_{i=1}|X_i-\overline X_n ...
Pham-Gia, T., Hung, T. L.
openaire   +2 more sources

Outliers Detection Models in Shewhart Control Charts; an Application in Photolithography: A Semiconductor Manufacturing Industry

open access: yesMathematics, 2020
Shewhart control charts with estimated control limits are widely used in practice. However, the estimated control limits are often affected by phase-I estimation errors.
Ishaq Adeyanju Raji   +4 more
doaj   +1 more source

ResnetAge: A Resnet-Based DNA Methylation Age Prediction Method

open access: yesBioengineering, 2023
Aging is a significant contributing factor to degenerative diseases such as cancer. The extent of DNA methylation in human cells indicates the aging process and screening for age-related methylation sites can be used to construct epigenetic clocks ...
Lijuan Shi   +4 more
doaj   +1 more source

Construction of New Coefficient of Variation Control Chart based on Median Absolute Deviation

open access: hybridQalaai Zanist Scientific Journal, 2017
Dashty Ismail Jamil   +2 more
openalex   +2 more sources

Feasibility Study of Robust Optimization to Reduce Dose Delivery Uncertainty by Potential Applicator Displacements for a Cervix Brachytherapy

open access: yesApplied Sciences, 2021
Brachytherapy is an important technique to increase the overall survival of cervical cancer patients. However, a possible shift of the applicators in relation to the target and organs at risk may occur between imaging and treatment.
Byungdu Jo   +7 more
doaj   +1 more source

Input data quality control for NDNQI national comparative statistics and quarterly reports: a contrast of three robust scale estimators for multiple outlier detection

open access: yesBMC Research Notes, 2012
Background To evaluate institutional nursing care performance in the context of national comparative statistics (benchmarks), approximately one in every three major healthcare institutions (over 1,800 hospitals) across the United States, have joined the ...
Hou Qingjiang   +4 more
doaj   +1 more source

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