全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
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作者:Weizhong Zhao , James J Chen , Roger Perkins ...
来源:[J].BMC Bioinformatics(IF 3.024), 2015, Vol.16 (13)Springer
摘要:...(#br) Methods and results(#br)Based on analysis of variation of statistical perplexity during topic modelling, a heuristic approach is proposed in this study to estimate the most appropriate number of topics. Specifically, the rate of perplexity change (RPC) as a function of n...
作者:Dietrich Klakow , Jochen Peters
来源:[J].Speech Communication(IF 1.283), 2002, Vol.38 (1), pp.19-28Elsevier
摘要:Abstract(#br)Many groups have investigated the relationship of word error rate and perplexity of language models. This issue is of central interest because perplexity optimization can be done independent of a recognizer and in most cases it is possible to find simple perplexity...
作者:Djamel Bouchaffra
来源:[J].Pattern Recognition(IF 2.632), 2004, Vol.38 (8), pp.1307-1315Elsevier
摘要:... To answer this challenge, we propose a novel approach based on probabilistic logic (PL) and the minimal perplexity criterion. In our approach, configurations are considered as probabilistic events such as predicates related through logical connectors. Our method was applied...
作者:M. Preve , E. Bolla , M. Godio ...
来源:[J].European Psychiatry(IF 3.285), 2016, Vol.33, pp.S338-S338Elsevier
摘要:... The aim of our study is to evaluate the role of a medical condition in perplexity inside psychotic mixed states in bipolar disorder (BD). We propouse three different cases and literature review.(#br)Method(#br)Three patients with perplexity in BD were assessed with: the SCID...
作者:Serguei V.S. Pakhomov , Glenn E. Smith , Susan Marino ...
来源:[J].Journal of Neurolinguistics(IF 1.115), 2009, Vol.23 (2), pp.127-144Elsevier
摘要:... The audio was transcribed and analyzed by calculating two measures: a perplexity index and an out-of-vocabulary (OOV) rate. The perplexity index represents the degree of deviation in word patterns used by FTLD patients compared to patterns of healthy adults. The OOV rate repr...
作者:Inés M. Gómez-Chacón
来源:[J].ZDM, 2017, Vol.49 (3), pp.323-338Springer
摘要:Using data provided by an empirical exploratory study with mathematics undergraduates, this paper discusses some key variables in the interaction between affective and cognitive dimensions in the perplexity state in problem solving. These variables are as follows: heuristics,...
作者:Frédéric Bimbot , Marc El-Bèze , Stéphane Igounet ...
来源:[J].Computer Speech & Language(IF 1.463), 2001, Vol.15 (1), pp.1-13Elsevier
摘要:Abstract(#br)Language models are usually evaluated on test texts using the perplexity derived from the model likelihood function computed on these texts (test set perplexity). In order to use this measure in the framework of a comparative evaluation campaign, we have developed an...
作者:Luca Martino , Víctor Elvira , Francisco Louzada
来源:[J].Signal Processing(IF 1.851), 2017, Vol.131, pp.386-401Elsevier
摘要:... Several examples are provided involving, for instance, the geometric mean of the weights, the discrete entropy (including the perplexity measure, already proposed in literature) and the Gini coefficient among others. We list five theoretical requirements which a generic ESS f...
作者:Nigel G. Ward , Alejandro Vega , Timo Baumann
来源:[J].Speech Communication(IF 1.283), 2011, Vol.54 (2), pp.161-174Elsevier
摘要:... Using perplexity as the metric, the most informative of these included recent speaking rate, volume, and pitch, and time until end of utterance. Using simple combinations of such features to augment trigram language models gave up to a 8.4% perplexity benefit on the Switchboa...

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