id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
work_jcxx2b72dzgzdlmln4dydjqxly	Patrick Reignier	Context-aware environments: from specification to implementation	2007	22	.pdf	application/pdf	4722	469	58	Two different implementations are proposed in this paper: a deterministic one based on Petri nets and a probabilistic one based on hidden Markov models. Keywords : Context recognition, Petri nets, hidden Markov models, automatic cameraman, Keywords : Context recognition, Petri nets, hidden Markov models, automatic cameraman, Situations and the underlying concepts (activity, roles or relations) are the context meta-model. used to implement a situation network representing a context model and how to evaluate a script. Note that Petri nets are very well adapted for implementing situation models containing parallelism. The situations of a context model can be implemented by the states of a HMM. 2. Given a sequence of observations (based on events) and a situation model implemented by a 2. Given a sequence of observations (based on events) and a situation model implemented by a Figure 11: States of the HMM implementation of the situation model for a meeting of 4 participants	./cache/work_jcxx2b72dzgzdlmln4dydjqxly.pdf	./txt/work_jcxx2b72dzgzdlmln4dydjqxly.txt