Issues with the expected information matrix of linear mixed models provided by popular statistical packages under missingness at random dropout.
Sign Up to like & getrecommendations! Published in 2023 at "Statistics in medicine"
DOI: 10.1002/sim.9754
Abstract: Likelihood-based methods ignoring missingness at random (MAR) produce consistent estimates provided that the whole likelihood model is correct. However, the expected information matrix (EIM) depends on the missingness mechanism. It has been shown that calculating… read more here.
Keywords: information matrix; naive eim; eim; mar ... See more keywords
Quantum Fisher Information Matrix in Critical System with Topological Characterization
Sign Up to like & getrecommendations! Published in 2021 at "International Journal of Theoretical Physics"
DOI: 10.1007/s10773-021-04847-4
Abstract: We explore quantum multi-parameter estimation, based on quantum Fisher information matrix (QFIM), in an extended anisotropic XY spin chain associated with non-trivial topological characterization driven by varying system parameters (i.e., magnetic field λ, the anisotropic… read more here.
Keywords: topological characterization; information matrix; fisher information; quantum fisher ... See more keywords
Mutual-information matrix analysis for nonlinear interactions of multivariate time series
Sign Up to like & getrecommendations! Published in 2017 at "Nonlinear Dynamics"
DOI: 10.1007/s11071-016-3254-7
Abstract: Random matrix theory (RMT) is a sophisticated technique to analyze the cross-correlations of multivariate time series, while it suffers from the limitation on characterizing the linear relationships. In this paper, we propose a new mutual-information… read more here.
Keywords: information matrix; mutual information; information; time series ... See more keywords
Generalized information matrix tests for copulas
Sign Up to like & getrecommendations! Published in 2019 at "Econometric Reviews"
DOI: 10.1080/07474938.2018.1514023
Abstract: Abstract We propose a family of goodness-of-fit tests for copulas. The tests use generalizations of the information matrix (IM) equality of White and so relate to the copula test proposed by Huang and Prokhorov. The… read more here.
Keywords: generalized information; tests copulas; information matrix; matrix tests ... See more keywords
Fisher Information Matrix and its Application of Bipolar Activation Function Based Multilayer Perceptrons With General Gaussian Input
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Access"
DOI: 10.1109/access.2022.3227427
Abstract: For the widely used multilayer perceptrons (MLPs), there exist singularities in the parameter space where Fisher information matrix (FIM) degenerates on these subspaces. The singularities seriously influence the learning dynamics of MLPs which have attracted… read more here.
Keywords: activation function; information matrix; function; fisher information ... See more keywords
Exact Fisher Information Matrix With State-Dependent Probability of Detection
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Transactions on Aerospace and Electronic Systems"
DOI: 10.1109/taes.2017.2667418
Abstract: In this paper, the exact Fisher information matrix (EFIM) is derived for target localization with range measurements under imperfect detection. We treat the probability of detection (PD) as a target state-dependent parameter, and take a… read more here.
Keywords: state; information; fisher information; information matrix ... See more keywords
Numerical approximation of the observed information matrix with Oakes' identity
Sign Up to like & getrecommendations! Published in 2018 at "British Journal of Mathematical and Statistical Psychology"
DOI: 10.1111/bmsp.12127
Abstract: An efficient and accurate numerical approximation methodology useful for obtaining the observed information matrix and subsequent asymptotic covariance matrix when fitting models with the EM algorithm is presented. The numerical approximation approach is compared to… read more here.
Keywords: numerical approximation; methodology; information matrix; observed information ... See more keywords
Information Matrix-Based Adaptive Sampling in Hull Form Optimisation
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Marine Science and Engineering"
DOI: 10.3390/jmse9090973
Abstract: Hull form optimisation involves challenges such as large design spaces, numerous design variables, and high nonlinearity. Therefore, optimisation that only use global approximate models alone cannot yield desirable results. An information matrix-based method is proposed… read more here.
Keywords: optimisation; hull form; information matrix;