ranking of features possesses a sure independence screening (SIS) property un? der certain conditions; that is, with probability very close to 1, the independence screening technique retains all of the important variables in the model. However, the SIS procedure in Fan and Lv (2008) only restricts to the ordinary linear models
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WhatsApp: +86 18221755073To address this issue, we proposed a group screening method to do variables selection on groups of variables in linear models. This group screening method is based on a working independence, and sure screening property is also established for our approach. To enhance the finite sample performance, a data-driven thresholding and a two-stage ...
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WhatsApp: +86 18221755073The linear screening method is very simple and easy to implement. One of the main contributions of this paper is to prove its asymptotic validity. To handle the bias cased by the model simplicity, we investigate the best linear approximation (BLA) of a nonlinear computer simulator. When the simulator is nearly sparse, we show that the active ...
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WhatsApp: +86 18221755073In this paper, we focus primarily on linear screening. When the screening is describable in terms of a dielectric response of the form (k) = 1+( sk) 2, one obtains the celebrated Yukawa potential (also known as the Debye-Huc kel or screened Coulomb potential) ˚(r) = Ze r e r= s; (1) where Zeis the impurity charge and s is the screening length.
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