Séminaire Donnees et APprentissage Artificiel
Fuzziness in Action: Exploration and Exploitation with Linguistic Terms
08/10/2019Intervenant(s) : Marek Reformat (University of Alberta)
Exploration and exploitation are two ways of conducting search processes. Tools we use to interact with the web focus on providing us with possibly the most accurate results. These tools try to find items as relevant as possible to a set of entered search keywords. Yet, in order to truly experience and take advantage of the vast amount of information gathered on the web, we should be able to control a degree of precision in our search process, i.e., we should be able to determine if we want to obtain clear and precise results, or if we want a collection of broad and somehow relevant findings. Furthermore, we would like to accomplish this in a friendly, human-like way. So far, imprecision – or shall we say diversification – of our search results is unplanned and happens accidently. We do not have the means to control a degree or extensiveness of that diversity while, at the same time, we initiate our queries specifying a number of keywords.
In this presentation, we hypothesize that fuzzy-based methods are able to address the above-mentioned issues. We say that application of linguistic terms and their personal interpretations allows for adaptable and flexible control of search processes. Imprecise formulation of search requirements enables users to achieve a balance between exploration and exploitation. Naturally, an intrinsic vagueness of the linguist terms makes the whole process less accurate, but a larger collection of relevant things is obtained leading to a true, browsing in-store experience. As a result, users are able to experience and explore large range of findings that do not match the search criteria to a high degree.
We will illustrate benefits of application for fuzzy methods via presenting two scenarios: searching for users with different degrees of similarity on a social network, and generating a list of recommendations based on groups of users satisfying a set of criteria to different degrees.
**Marek Reformat's bio**
Marek Reformat received his MSc degree (with honors) from Technical University of Poznan, Poland, and a PhD degree from University of Manitoba, Canada. His initial research projects involved different aspects related to computer networks, especially in the area of management and performance measurement. He co-authored several papers and reports regarding this topic. During his PhD studies, his research interests included distributed computing, with emphasis on fault-tolerant systems in such frameworks as Parallel Virtual Machine (PVM) and Message Passing Interface (MPI); optimization methods; and fuzzy sets and systems. His principle interest was related to evolutionary computing and its application to optimization problems. He proposed a new methodology for design of control systems, which relied on a combination of advanced system simulators and genetic computation. He applied this concept to the control design problem in the area of power systems. In 1997 he joined the Manitoba HVDC Research Centre, where he was a member of a simulation software development team. He was involved in improvement and development of an electromagnetic transients program for time-domain simulation, performed functional and structural testing of the software, and provided expert consulting services in the area of simulation and modeling internationally. He has been with the Department of Electrical and Computer Engineering at University of Alberta since July 2000. He is Professor and Associate Chair of Graduate Studies in the Department. In addition, he is an Associate Editor of a number of journals related to computational intelligence and software engineering. He has been a member of program committees of several conferences related to those areas. He is actively involved in North American Fuzzy Information Processing Society (NAFIPS). He is a member of the IEEE and ACM. He is currently the president of the International Fuzzy Systems Association (IFSA).
Marek stays at LIP6, in the LFI team, until October 14th, he benefits from the LIP6 Invited professor funding.
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benjamin.piwowarski (at) nulllip6.fr