Zobrazeno 1 - 10
of 422
pro vyhledávání: '"Commenges Daniel"'
Publikováno v:
The R Journal (2021)
Implementations in R of classical general-purpose algorithms for local optimization generally have two major limitations which cause difficulties in applications to complex problems: too loose convergence criteria and too long calculation time. By re
Externí odkaz:
http://arxiv.org/abs/2009.03840
Autor:
Neau Didier, Breilh Dominique, Pellegrin Isabelle, Commenges Daniel, Wittkop Linda, Lacoste Denis, Pellegrin Jean-Luc, Chêne Geneviève, Dabis François, Thiébaut Rodolphe
Publikováno v:
BMC Medical Research Methodology, Vol 8, Iss 1, p 68 (2008)
Abstract Background Principal component analysis (PCA) and partial least square (PLS) regression may be useful to summarize the HIV genotypic information. Without pre-selection each mutation presented in at least one patient is considered with a diff
Externí odkaz:
https://doaj.org/article/ed2e47ab92f34a13980a38b296284187
Autor:
Trimoulet Pascale, Chêne Geneviève, Jacqmin-Gadda Hélène, Guedj Jérémie, Thiébaut Rodolphe, Neau Didier, Commenges Daniel
Publikováno v:
BMC Medical Research Methodology, Vol 6, Iss 1, p 38 (2006)
Abstract Background Mathematical models are widely used for studying the dynamic of infectious agents such as hepatitis C virus (HCV). Most often, model parameters are estimated using standard least-square procedures for each individual. Hierarchical
Externí odkaz:
https://doaj.org/article/b5d6fad13b094e8c9c9723a13e169772
Autor:
Commenges, Daniel, Prague, Mélanie
We consider the problem of defining the effect of an intervention on a time-varying risk factor or treatment for a disease or a physiological marker; we develop here the latter case. So, the system considered is $(Y,A,C)$, where $Y=(Y_t)$, is the mar
Externí odkaz:
http://arxiv.org/abs/1907.12804
Autor:
Commenges, Daniel
Several approaches to causal inference from observational studies have been proposed. Since the proposal of Rubin (1974) many works have developed a counterfactual approach to causality, statistically formalized by potential outcomes. Pearl (2000) ha
Externí odkaz:
http://arxiv.org/abs/1905.01195
Autor:
Taddé, Bachirou O., Jacqmin-Gadda, Hélène, Dartigues, Jean-François, Commenges, Daniel, Proust-Lima, Cécile
Publikováno v:
Biometrics . 2020 Sep;76(3):886-899
Alzheimer's disease gradually affects several components including the cerebral dimension with brain atrophies, the cognitive dimension with a decline in various functions and the functional dimension with impairment in the daily living activities. U
Externí odkaz:
http://arxiv.org/abs/1806.03659
Autor:
Commenges, Daniel
The stochastic system approach to causality is applied to situations where the risk of death is not negligible. This approach grounds causality on physical laws, distinguishes system and observation and represents the system by multivariate stochasti
Externí odkaz:
http://arxiv.org/abs/1610.01869
Combination Antiretroviral Therapy (cART) succeeds to control viral replication in most HIV infected patients. This is normally followed by a reconstitution of the CD4$^+$ T cells pool; however, this does not happen for a substantial proportion of pa
Externí odkaz:
http://arxiv.org/abs/1602.05399
Autor:
Commenges, Daniel
We give an overview of the role of information theory in statistics, and particularly in biostatistics. We recall the basic quantities in information theory; entropy, cross-entropy, conditional entropy, mutual information and Kullback-Leibler risk. T
Externí odkaz:
http://arxiv.org/abs/1511.00860