Results 21 to 30 of about 1,476,983 (297)

Assessing the Performance of Satellite-Based Models for Crop Yield Estimation in the Canadian Prairies

open access: yesCanadian Journal of Remote Sensing, 2023
Timely monitoring of crop production using a remote sensing-based approach offers promise toward enhancing food security. Statistical models developed using satellite data typically employ a single vegetation index from a single sensor for yield ...
Jumi Gogoi   +4 more
doaj   +1 more source

A bootstrap test for single index models [PDF]

open access: yesStatistics, 2001
Single index models are frequently used in econometrics and biometrics. Logit and Probit models arc special cases with fixed link functions. In this paper we consider a bootstrap specification test that detects nonparametric deviations of the link function.
Härdle, Wolfgang   +2 more
openaire   +6 more sources

Checking Heteroscedasticity in Partially Linear Single-Index Models Using Pairwise Distance

open access: yesIEEE Access, 2020
In this article, a new test is proposed for partially linear single-index models (PLSIM) based on the pairwise distances of the sample points, to test heteroscedasticity.
Jian-Qiang Zhao   +4 more
doaj   +1 more source

Using single-index ODEs to study dynamic gene regulatory network. [PDF]

open access: yesPLoS ONE, 2018
With the development of biotechnology, high-throughput studies on protein-protein, protein-gene, and gene-gene interactions become possible and attract remarkable attention.
Qi Zhang, Yao Yu, Jun Zhang, Hua Liang
doaj   +1 more source

Identification of organic compounds using artificial neural networks and refractive index [PDF]

open access: yesJournal of the Serbian Chemical Society, 2023
Identification of chemical compounds has many applications in science and technology. However, this process still relies significantly on the knowledge and experience of chemists.
Kirigiti Innocent Abel   +2 more
doaj   +1 more source

Estimation in monotone single‐index models [PDF]

open access: yesStatistica Neerlandica, 2018
Single‐index models are popular regression models that are more flexible than linear models and still maintain more structure than purely nonparametric models. We consider the problem of estimating the regression parameters under a monotonicity constraint on the unknown link function.
Piet Groeneboom, Kim Hendrickx
openaire   +5 more sources

Sparse single-index model

open access: yesJ. Mach. Learn. Res., 2011
Let $(\bX, Y)$ be a random pair taking values in $\mathbb R^p \times \mathbb R$. In the so-called single-index model, one has $Y=f^{\star}(θ^{\star T}\bX)+\bW$, where $f^{\star}$ is an unknown univariate measurable function, $θ^{\star}$ is an unknown vector in $\mathbb R^d$, and $W$ denotes a random noise satisfying $\mathbb E[\bW|\bX]=0$.
Alquier, Pierre, Biau, Gérard
openaire   +5 more sources

Integrating Spectral Information and Meteorological Data to Monitor Wheat Yellow Rust at a Regional Scale: A Case Study

open access: yesRemote Sensing, 2021
Wheat yellow rust has a severe impact on wheat production and threatens food security in China; as such, an effective monitoring method is necessary at the regional scale.
Qiong Zheng   +8 more
doaj   +1 more source

Simplified Pediatric Index of Mortality 3 Score by Explainable Machine Learning Algorithm

open access: yesCritical Care Explorations, 2021
OBJECTIVES:. Pediatric Index of Mortality 3 is a validated tool including 11 variables for the assessment of mortality risk in PICU patients. With the recent advances in explainable machine learning algorithms, we aimed to assess feasibility of ...
Orkun Baloglu, MD   +4 more
doaj   +1 more source

Score Tests for the Single Index Model [PDF]

open access: yesTechnometrics, 2002
The single index model is a generalization of the linear regression model with E(y|x) = g(x′β), where g is an unknown function. The model provides a flexible alternative to the linear regression model while providing more structure than a fully nonparametric approach.
Jeffrey S. Simonoff, Chih-Ling Tsai
openaire   +1 more source

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