Results 31 to 40 of about 536,991 (288)

Iterative Weighted Least Squares Estimators

open access: yesThe Annals of Statistics, 1993
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Chen, Jiahua, Shao, Jun
openaire   +3 more sources

Weighted Least Squares and Adaptive Least Squares: Further Empirical Evidence [PDF]

open access: yes, 2017
This paper compares ordinary least squares (OLS), weighted least squares (WLS), and adaptive least squares (ALS) by means of a Monte Carlo study and an application to two empirical data sets. Overall, ALS emerges as the winner: It achieves most or even all of the efficiency gains of WLS over OLS when WLS outperforms OLS, but it only has very limited ...
Sterchi, Martin, Wolf, Michael
openaire   +2 more sources

Iterative Weighted Least Squares

open access: yes, 2022
peerReviewed
Nordhausen, Klaus, Taskinen, Sara
openaire   +4 more sources

A new method of weighted choice in InSAR Least Squares unwrapping

open access: yesGeodesy and Geodynamics, 2012
The decorelation phenomena such as Low-SNR radar signal, shadows and layover caused by topography etc, causes phase data discontinuous and makes the result of unwrapping phase inaccurate or completely wrong.
Liu Weike, Liu Goulin
doaj   +1 more source

Closed-form and iterative weighted least squares solutions of Helmert transformation parameters

open access: yesJournal of Geodetic Science, 2013
The Helmert transformation is the most common transformation between different geodetic systems. In 2-D, in contrast to higher dimensions, it is a well-known procedure how to determine the 4 transformation parameters in a closed form.
Sjöberg L.E.
doaj   +1 more source

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

open access: yesFEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li   +2 more
wiley   +1 more source

Strong Consistency of Estimators in a Partially Linear Model with Asymptotically Almost Negatively Associated Errors

open access: yesDiscrete Dynamics in Nature and Society, 2020
This paper studies a heteroscedastic partially linear regression model in which the errors are asymptotically almost negatively associated (AANA, in short) random variables with not necessarily identical distribution and zero mean.
Yu Zhang, Xinsheng Liu, Mohamed Sief
doaj   +1 more source

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

open access: yesFEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee   +3 more
wiley   +1 more source

Monotonic Properties of the Least Squares Mean

open access: yes, 2010
We settle an open problem of several years standing by showing that the least-squares mean for positive definite matrices is monotone for the usual (Loewner) order.
Lawson, Jimmie, Lim, Yongdo
core   +1 more source

Fitting a function to time-dependent ensemble averaged data [PDF]

open access: yes, 2018
Time-dependent ensemble averages, i.e., trajectory-based averages of some observable, are of importance in many fields of science. A crucial objective when interpreting such data is to fit these averages (for instance, squared displacements) with a ...
Ambjornsson, Tobias   +3 more
core   +3 more sources

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