Such unit of information is called a belief. The second aspect concerns the extension of our approach to non-indexical epistemic knowledge — i. Partially observable markov decision processes for spoken dialog systems. Schematic view of a belief representation. The robot must therefore be capable of actively focusing on the important, rele- vant areas while ignoring the rest.

An entity can be an object, a place, a landmark, a person, etc. Producing contextually appropriate intonation in an information-state based dialogue system. A graphical illustration of the belief i is provided in Figure 4. Improving the accuracy and efficiency of MAP inference for markov logic. The symbol grounding problem,

If this new information conflicts with existing knowledge, the agent can decide thesiss trigger a clarification request to resolve the conflict. Belief modelling for situation awareness in human-robot interaction.

pierre lison thesis

Since these two rules admit a few exceptions profes- sors can be on sabbatical, and some undergraduates can teach as assistantsthey are specified as soft constraints with finite weights w1 and w2. PhD thesis, MIT, lisom Markov Logic is a combination of first-order logic and probabilistic modelling. We specify such information in the epistemic status of the belief. Such perceptual belief i would be formally defined as: This con- stitutes our sixth and final requirement.

Pierre Lison Completes Doctoral Degree

Finally, we want to evaluate the empirical performance plerre scalability of our approach under a set of controlled experiments. Thessi for- mation of belief models proceeds in four consecutive steps: The value of the node is true iff the ground predicate is true.


This perceptual grouping process is triggered at each insertion or update of percepts on the binder provided the number of modalities in the Levels of beliefs Stable belief Temporal union Temporal smoothing Multi-modal belief Percept union Percept Tracking The belief i also specifies a belief history h. An edge between two nodes signifies that the corresponding ground atoms appear together in at least one grounding of one formula in Lispn.

A the end of the process, a percep- tual belief is created, with four features: A computer vision integration model for a multi-modal cognitive system. The architectural schema is based on a distributed thessi of subarchitectures. Pierre worked in various areas of machine learning and language technology, such as human-robot interaction, conversational interfaces, search technology, machine translation and text mining.

pierre lison thesis

Exact inference in Markov Networks is a P-complete problem [15] and is thus untractable. In the following, we briefly review the definition of Markov networks, and then show how they can be generated from a Markov logic network L.

Beliefs are constrained both spatio-temporally and epistemically. An entity can be an object, a place, a landmark, a person, etc. Furthermore, performance requirements can be addressed with ap- proximation algorithms for probabilistic inference optimised for Markov Logic [24,23]. The resulting thedis can also be easily accessed and retrieved by the other subarchitectures. The epistemic status of this information is attributed.

Its main purpose is to serve as the voice of young researchers in the public arena, through a range of initiatives related to research policy and science dissemination. Everybody is welcome to attend!


A grouping of two percepts will be given a high probability if 1 one or more loson pairs correlate with each other, and 2 there are no incompatible feature pairs. We are using the Alchemy software 4 for efficient probabilistic inference. The belief models must therefore incorporate mecha- nisms for computing and adapting these saliency measures over time.

Pierre Lison Completes Doctoral Degree – Department of Informatics

Our approach departs from previous work such as [13] or [27] by introducing a much richer modelling of multi- modal beliefs. For a pair of two percepts p1 and p2we infer the likelihood of these two percepts being generated from the same underlying entity in the real-world.

At NR, Pierre will, among other topics, continue his postdoctoral project and work on personalized marketing as part of the Pierrw for Research-based Innovation Big Insight. Bottom-up belief model formation.

pierre lison thesis

The belief B2 is selected as most likely referent. A blue mug colour, location, and height.

We describe below each of these components one by one.