Model selection for the extraction of movement primitives.
Model selection for the extraction of movement primitives.
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DOI:
10.3389/fncom.2013.00185
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发表时间:
2013
影响因子:
3.2
通讯作者:
Giese MA
中科院分区:
文献类型:
--
作者:
Endres DM;Chiovetto E;Giese MA
A wide range of blind source separation methods have been used in motor control research for the extraction of movement primitives from EMG and kinematic data. Popular examples are principal component analysis (PCA), independent component analysis (ICA), anechoic demixing, and the time-varying synergy model (d'Avella and Tresch,). However, choosing the parameters of these models, or indeed choosing the type of model, is often done in a heuristic fashion, driven by result expectations as much as by the data. We propose an objective criterion which allows to select the model type, number of primitives and the temporal smoothness prior. Our approach is based on a Laplace approximation to the posterior distribution of the parameters of a given blind source separation model, re-formulated as a Bayesian generative model. We first validate our criterion on ground truth data, showing that it performs at least as good as traditional model selection criteria [Bayesian information criterion, BIC (Schwarz,) and the Akaike Information Criterion (AIC) (Akaike,)]. Then, we analyze human gait data, finding that an anechoic mixture model with a temporal smoothness constraint on the sources can best account for the data.
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影响因子:
5.3
作者:
d'Avella, Andrea;Portone, Alessandro;Lacquaniti, Francesco
通讯作者:
Lacquaniti, Francesco
影响因子:
3.2
作者:
Chiovetto E;Berret B;Delis I;Panzeri S;Pozzo T
通讯作者:
Pozzo T
影响因子:
2
作者:
Chiovetto, Enrico;Patane, Laura;Pozzo, Thierry
通讯作者:
Pozzo, Thierry
影响因子:
--
作者:
Bizzi, E.;Cheung, V. C. K.;Tresch, M.
通讯作者:
Tresch, M.
影响因子:
64.8
作者:
Harris, CM;Wolpert, DM
通讯作者:
Wolpert, DM