نتایج جستجو برای: lda

تعداد نتایج: 5888  

2014
Pierre-François Loos Caleb J. Ball Peter M. W. Gill

We introduce a generalization (gLDA) of the traditional Local Density Approximation (LDA) within density functional theory. The gLDA uses both the one-electron Seitz radius rs and a two-electron hole curvature parameter η at each point in space. The gLDA reduces to the LDA when applied to the infinite homogeneous electron gas but, unlike the LDA, is is also exact for finite uniform electron gas...

Journal: :The Journal of chemical physics 2014
Pierre-François Loos Caleb J Ball Peter M W Gill

We introduce a generalization (gLDA) of the traditional Local Density Approximation (LDA) within density functional theory. The gLDA uses both the one-electron Seitz radius rs and a two-electron hole curvature parameter η at each point in space. The gLDA reduces to the LDA when applied to the infinite homogeneous electron gas but, unlike the LDA, it is also exact for finite uniform electron gas...

Journal: :Problems of Information Transmission 2017

Journal: :Journal of Korean Institute of Intelligent Systems 2015

Journal: :Communications in Statistics - Simulation and Computation 2023

The Latent Dirichlet Location (LDA) model is a popular method for creating mixed-membership clusters. Despite having been originally developed text analysis, LDA has used wide range of other applications. We propose new formulation the which incorporates covariates. In this model, negative binomial regression embedded within LDA, enabling straight-forward interpretation coefficients and analysi...

Journal: :IEEE Trans. Pattern Anal. Mach. Intell. 2001
Marco Loog Robert P. W. Duin Reinhold Häb-Umbach

ÐWe derive a class of computationally inexpensive linear dimension reduction criteria by introducing a weighted variant of the well-known K-class Fisher criterion associated with linear discriminant analysis (LDA). It can be seen that LDA weights contributions of individual class pairs according to the Euclidian distance of the respective class means. We generalize upon LDA by introducing a dif...

2009
Viet Ha-Thuc Padmini Srinivasan

Relevance-based language models operate by estimating the probabilities of observing words in documents relevant (or pseudo relevant) to a topic. However, these models assume that if a document is relevant to a topic, then all tokens in the document are relevant to that topic. This could limit model robustness and effectiveness. In this study, we propose a Latent Dirichlet relevance model, whic...

2014
Annalisa De Girolamo Salvatore Cervellieri Angelo Visconti Michelangelo Pascale

Fourier-transform-near infrared (FT-NIR) spectroscopy has been used to develop quantitative and classification models for the prediction of deoxynivalenol (DON) levels in durum wheat samples. Partial least-squares (PLS) regression analysis was used to determine DON in wheat samples in the range of <50-16,000 µg/kg DON. The model displayed a large root mean square error of prediction value (1,97...

Journal: :The Journal of clinical endocrinology and metabolism 2017
Rose G Radin Lindsey A Sjaarda Neil J Perkins Robert M Silver Zhen Chen Laurie L Lesher Noya Galai Jean Wactawski-Wende Sunni L Mumford Enrique F Schisterman

Context Among women with a single, recent pregnancy loss, daily preconception low-dose aspirin (LDA) increased the live birth rate with no effect on pregnancy loss. Ovulation is a potential mechanism underlying this effect. Objective We estimated the effect of LDA on the per-cycle risk of anovulation among eumenorrheic women. Design Multicenter, randomized, double-blind, placebo-controlled ...

2015
Yuji Shimada Akihito Nagahara Mariko Hojo Daisuke Asaoka Hitoshi Sasaki Hiroya Ueyama Kenshi Matsumoto Sumio Watanabe

Background. We investigated the prevalence, symptoms, and QOL impact of esophageal (EI), gastric (GI), and duodenal mucosal injury (DI) individually between low-dose aspirin (LDA) users and nonusers to reveal the clinical features of LDA-related mucosal injury. Methods. Data were extracted from the records of subjects who underwent upper gastrointestinal endoscopy at our department between Apri...

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