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ICDT
2010
ACM
141views Database» more  ICDT 2010»
14 years 26 days ago
The Complexity of Rooted Phylogeny problems
Several computational problems in phylogenetic reconstruction can be formulated as restrictions of the following general problem: given a formula in conjunctive normal form where ...
Manuel Bodirsky, Jens K. Mueller
IS
2007
13 years 8 months ago
Semantic optimization techniques for preference queries
Preference queries are relational algebra or SQL queries that contain occurrences of the winnow operator (find the most preferred tuples in a given relation). Such queries are pa...
Jan Chomicki
AAI
2006
106views more  AAI 2006»
13 years 8 months ago
Metaheuristics for Handling Time Interval Coverage Constraints in Nurse Scheduling
The problem of finding a high quality timetable for personnel in a hospital ward has been addressed by many researchers, personnel managers and schedulers over a number of years. ...
Edmund K. Burke, Patrick De Causmaecker, Sanja Pet...
STDBM
2004
Springer
127views Database» more  STDBM 2004»
14 years 2 months ago
Condition Evaluation for Speculative Systems: a Streaming Time Series Case
Application systems often need to react with certain actions whenever some preset conditions are satisfied. In many cases, the evaluation of these conditions takes long time, but...
Xiaoyang Sean Wang, Like Gao, Min Wang
ICWL
2007
Springer
14 years 2 months ago
Using Constraint-Based Modelling to Describe the Solution Space of Ill-defined Problems in Logic Programming
Intelligent Tutoring Systems have made great strides in recent years. Many of these gains have been achieved for welldefined problems. However, solving ill-defined problems is imp...
Nguyen-Thinh Le, Wolfgang Menzel