9 Result(s)

Article

Comparison of minimal residual disease levels in bone marrow and peripheral blood in adult acute lymphoblastic leukemia

Michaela Kotrova, Antonia Volland, Britta Kehden, Heiko Trautmann… in Leukemia (2020)

Chapter and Conference Paper

Multi-objective Problems in Terms of Relational Algebra

Relational algebra has been shown to be a powerful tool for solving a wide range of combinatorial optimization problems with small computational and programming effort. The problems considered in recent years ...

Florian Diedrich, Britta Kehden… in Relations and Kleene Algebra in Computer S… (2008)

Chapter and Conference Paper

Relational Construction of Specific Timetables

We use relation algebra to model an abstract timetabling problem and to compute solutions. The problem was posed to us by the administration of our university and stems from the current change from the classic...

Rudolf Berghammer, Britta Kehden in Operations Research Proceedings 2007 (2008)

Chapter and Conference Paper

Relation Algebra and RelView in Practical Use: Construction of Special University Timetables

In this paper, we are concerned with a special timetabling problem. It was posed to us by the administration of our university and stems from the adoption of the British-American system of university education...

Rudolf Berghammer, Britta Kehden in Relations and Kleene Algebra in Computer Science (2008)

Chapter and Conference Paper

Relational Implementation of Simple Parallel Evolutionary Algorithms

Randomized search heuristics, among them evolutionary algorithms, are applied to problems whose structure is not well understood, as well as to hard problems in combinatorial optimization to get near-optimal s...

Britta Kehden, Frank Neumann, Rudolf Berghammer in Relational Methods in Computer Science (2006)

Chapter and Conference Paper

A Relation-Algebraic View on Evolutionary Algorithms for Some Graph Problems

We take a relation-algebraic view on the formulation of evolutionary algorithms in discrete search spaces. First, we show how individuals and populations can be represented as relations and formulate some stan...

Britta Kehden, Frank Neumann in Evolutionary Computation in Combinatorial Optimization (2006)

Chapter and Conference Paper

Evaluating Sets of Search Points Using Relational Algebra

We model a set of search points as a relation and use relational algebra to evaluate all elements of the set in one step in order to select search points with certain properties. Therefore we transform relatio...

Britta Kehden in Relations and Kleene Algebra in Computer Science (2006)