# Department of Information and Computing Sciences

## Onderwijs Informatica en Informatiekunde

Vak-informatie Informatica en Informatiekunde

# Probabilistic reasoning

Course code:INFOPROB
Credits:7.5 ECTS
Period:period 1 (week 36 through 45, i.e., 5-9-2016 through 11-11-2016; retake week 1)
Timeslot:D
Participants:up till now 52 subscriptions
Schedule:Official schedule representation can be found in Osiris
Teachers:Dit is een oud rooster!
formgrouptimeweekroomteacher
lecture   Wed 13.15-15.0037-44 BBG-205 Silja Renooij

Fri 11.00-12.4537-44 HFG-611AB
Contents:

How long after infection will we detect classical swine fever on this farm?
What is the risk of Mr Johnson developing a coronary heart disease?
Should Mrs Peterson be given the loan she requested?

Human experts have to make judgments and decisions based on uncertain, and often even conflicting, information. To support these complex decisions, knowledge-based systems should be able to cope with this type of information. For this reason, formalisms for representing uncertainty and algorithms for manipulating uncertain information are important research subjects within the field of Artificial Intelligence. Probability theory is one of the oldest theories dealing with the concept of uncertainty; it is therefore no surprise that the applicability of this mathematical theory as a model for reasoning under uncertainty plays an important role.

In this course, we will consider probabilistic models for manipulating uncertain information in knowledge-based systems. More specifically, we will consider the theory underlying the framework of Bayesian networks, and discuss the construction of such networks for real-life applications.

Warning: This course requires abstract thinking and mathematical skills. More specifically, it requires a basic understanding of probabilities. You can have a look at the course slides to get an impression of the level of mathematics involved.

Literature:1. Syllabus 'Probabilistic Reasoning', sold by A-Eskwadraat;
2. Studymanual, available online (see website with additional information);
3. Course slides, also available online.
Course form:- Lectures (twice a week).
- Self-assessment exercises.
Exam form:Four practical assignments (15% in total) and one written exam (85%). If you are registered for the course, you are automatically entitled to partaking in these exams. Those who are allowed to do a substitute exam (see re-examination conditions) are automatically registered for this.

Note that course registration proceeds through OSIRIS and generally closes about 8 weeks before the start of the course (see registration dates)! If you are planning on taking this course in your first year, you will be notified how to register during the Master Introduction. The lecturer has no OSIRIS-access and cannot do the registration for you.
Minimum effort to qualify for 2nd chance exam:Om aan de aanvullende toets te mogen meedoen moet de oorspronkelijke uitslag minstens 4 zijn. (See re-examinition conditions on the website with additional info)
Description:In this course, we will consider the theory and applicability of Bayesian networks. The course roughly consists of three parts. As an introduction to probabilistic networks, the first part of the course deals with independence relations and their graphical represenation by means of undirected and directed graphs. The second part introduces the Bayesian network as a compact representation of a probability distribution on a set of statistical variables; in addition, the Pearl algorithm for computing probabilities from a Bayesian network is discussed. The algorithm allows for calculating the probability of any value of an arbitrary variable in the network, with or without incorporating observations for one or more variables. The third part of this course concerns the construction of Bayesian networks for real-life applications. Topics covered include both automated construction of networks from data, and handcrafting the network with the help of domain experts.
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