Results 31 to 40 of about 2,399,144 (266)

On Shrinkage Estimators and “Effective Degrees of Freedom”

open access: yes, 2020
Explicit expressions for the estimated mean \(\tilde {\mathbf {y}}_k = X\tilde {\boldsymbol {\beta }}_k = H_k\mathbf {y}\) and effective degrees of freedomνk = tr(Hk) by penalized least squares, with penalty k||Dβ||2, can be found readily when X′X + D′D is nonsingular.
LaMotte, Lynn R.   +2 more
openaire   +3 more sources

Effect of Na+ on hydration degree of alkali activated metakaolin polymer

open access: yesMagazine of Civil Engineering, 2022
In recent years, geopolymeric gel materials have become a hot research issue due to their good mechanical properties, durability and excellent chemical stability.
Zhao Yagebai   +4 more
doaj   +1 more source

Numerical Investigation of Oblique Currents’ Effects on the Hydrodynamic Characteristics of Ships in Restricted Waters

open access: yesJournal of Marine Science and Engineering
The influence of oblique currents in narrow and shallow channels causes the fluid flow around ships to become complex. To analyze the hydrodynamic characteristics of a ship in such channels, it is essential to examine the influence of oblique currents on
Yilin Huang   +4 more
doaj   +1 more source

Systematic Measurement and Analysis of Beam Degree of Polarization Under Diverse Atmospheric Turbulence Conditions

open access: yesPhotonics
Atmospheric turbulence-induced random fluctuations in the refractive index can lead to the degradation of the polarization of polarized light. In accordance with the unified theory of coherent polarization, a comprehensive investigation was undertaken to
Chenghu Ke   +3 more
doaj   +1 more source

Effect of degree distribution on evolutionary search

open access: yesProceedings of the 11th Annual conference on Genetic and evolutionary computation, 2009
This paper introduces a method to generate hierarchically modular networks with prescribed node degree list and proposes a metric to measure network modularity based on the notion of edge distance. The generated networks are used as test problems to explore the effect of modularity and degree distribution on evolutionary algorithm performance.
openaire   +2 more sources

Research on Categorization of Animation Effect Based on Data Mining

open access: yesMATEC Web of Conferences, 2015
Nowadays, the production process of animation effect is increasingly developed, and its effect is also growing better. But in most cases, the categorization of special effect added to the animation is confusing due to excessive variations.
Ni Na
doaj   +1 more source

The Effect of Obesity Degree on Childhood Pulmonary Function Tests

open access: yesBalkan Medical Journal, 2014
Background: Childhood obesity has become a global epidemic. It is related to several chronic diseases such as essential hypertension, type 2 diabetes mellitus, and renal disease.
Emel Torun   +3 more
doaj   +1 more source

European Standard Clinical Practice Guideline and EXPeRT Recommendations for the Diagnosis and Management of Gastroenteropancreatic Neuroendocrine Neoplasms in Children and Adolescents

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen   +23 more
wiley   +1 more source

Effect of low-degree astigmatism on the objective visual quality [PDF]

open access: yesInternational Journal of Ophthalmology
AIM: To evaluate the effect of low-degree astigmatism on objective visual quality through the Optical Quality Analysis System (OQAS). METHODS: This study enrolled 46 participants (aged 23 to 30y, 90 eyes) with normal or corrected-to-normal vision.
Ling-Ying Ye   +4 more
doaj   +1 more source

Health‐Related Social Needs in Children With Sickle Cell Disease Are Associated With Worse Health‐Related Quality of Life

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Children with sickle cell disease (SCD) face multiple acute and chronic medical complications that may impact their quality of life as reported by patients themselves. Health‐related social needs (HRSNs), such as food and housing insecurity, are common in people with SCD, but the association between HRSNs and patient‐reported ...
Sarah J. Marks   +5 more
wiley   +1 more source

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