Tree structure genetic algorithm with a nourishment mechanism

  • Zhangang Han
  • Ruqian Lu
Session 14: Mathematical Programming and Genetic Algorithms
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1276)


Genetic algorithms with tree structures to act as genes have some special properties which are different from that of string genetic algorithms. In this paper, a definition of schema for tree structures is proposed and a credit value is assigned to every node and every arc of a tree; a new concept, frame arc, is introduced to describe the structure of a schema. A credit partitioning mechanism, Nourishment Mechanism, which exploits a tree's two dimensional property is presented. We show that a schema with higher total credit value has a larger probability to survive in a genetic algorithm with nourishment mechanism than in an original genetic algorithm without nourishment mechanism. Accumulation of node credits is also calculated.


genetic algorithms genetic programming crossover credit partitioning 


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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • Zhangang Han
    • 1
    • 2
  • Ruqian Lu
    • 2
  1. 1.Systems Science DepartmentBeijing Normal UniversityBeijingP. R. China
  2. 2.Institute of Mathematics, Academia SinicaBeijingP. R. China

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