esearch
areas: S. Velickov
Machine learning and statistical learning theory
Application of Machine Learning (ML) in Hydroinformatics through
the development of algorithms that can automatically learn from
quantitative and qualitative data-that is, build models, extract
patterns, and adapt to changing situations-and making software tools
for human data analysts to more easily explore and better understand
data based on statistical learning theory. My main research interests
include:
induction
algorithms using decision trees and progressive rule generation;
sub-symbolic
learning methods such as Artificial Neural Networks and other connectionists
models.
Support
Vector Machines (SVM) based on Vapnik's statistical learning theory.
concept
hierarchies and their automatic generation.
automated
knowledge acquisition ("learning to learn").
Data Mining and Data-driven modelling
The large potentials in the existing data banks related to water
resources and environmental engineering need to be explored in order
to transform these data/observables into valuable information and
knowledge. The key to these potentials can be found in data mining,
which as a new emergent field in hydroinformatics provides the technologies
and tools to describe, understand and predict water-related and
environmental natural processes. These techniques are divided into
two general categories: (a) prediction and (b) knowledge
discovery.
The focus of my research in this field is put on predictive data
mining. The main goal of the predictive data mining is through processing
of data/observables (records from the past) to describe the underlying
dynamics of the complex systems and to discover hidden knowledge
(such as: clusters, patterns, associations, rules, correlation properties,
trends) from those data. Furthermore, these predictive data mining
techniques have the possibilities to reconstruct the dynamics of
the systems from the observables and predict the future behavior
of the system. My main research interests include:
exploratory
data analysis.
wavelet
analysis of time-series.
clustering
and classification.
association
and classification rule mining.
local non-linear
modelling of time-series based on chaos theory.
knowledge
mapping and visualization.
Internet technologies and computing
Internet and intranet environments provide exciting opportunities
for remote modelling, collaborative engineering and efficient knowledge
management. Here at hydroinformatics section we are exploring the
emergent internet technologies that may be used to build net-based
applications in hydroinformatics, such as CGI, ISAPI/NSAPI, ActiveX,
Java, ASP, XML, ColdFusion, Flash and other technologies. We study
their philosophy, structure, advantages and disadvantages, and their
potential use for remote modelling, distributed computing (and programming),
distance learning, and collaborative design and decision making
processes over the Internet. Implementing the above-mentioned technologies,
several
prototypes were built as remote modelling hydroinformatics systems,
mainly for an educational and distance learning purposes.
Knowledge Management
Shortly, Knowledge Management can be defined as "theory
and strategy based upon the synergy between human creativity and
capabilities afforded by new information technologies". As
a member of the Knowledge
Management team within the Delft
Cluster project, my main research interests in this area include:
knowledge
sharing and distribution.
document
and content management.
text mining.
collaborative
engineering and communities of practice.
knowledge
maps: automated generation and navigation.
knowledge
portals.
Multiagent systems and Distributed Artificial Intelligence
Distributed Artificial Intelligence (DAI) today is established
and promising research and application filed which brings together
and draws on results, concepts and ideas from many disciplines,
including Artificial Intelligence (AI), computer science, sociology,
organization and management science, and psychology. Its broad scope
and multi-disciplinary nature make it difficult to precisely define
DAI in a few words. One possible definition could be that DAI is
study, construction and applications of multiagent systems. Multiagent
systems are systems in which several interacting, intelligent agents
perform some set of tasks. As hydroinformtics has very strong socio-technical
dimension there are many common points with DAI and challenging
research issues that need to be explored. My main research interests
in this area include:
Instantiation
of simulation models using multiagent systems.
Distributed
computing using multiagent systems.
Distributed
decision-making using multiagent systems.
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