Download Constraint-Based Agents: An Architecture for by Alexander Nareyek (auth.) PDF

By Alexander Nareyek (auth.)

Autonomous brokers became a colourful examine and improvement subject lately attracting task and a spotlight from quite a few components. the fundamental agent suggestion contains proactive independent devices with goal-directed-behaviour and conversation features. The ebook specializes in self sustaining brokers which can act in a target directed demeanour below actual time constraints and incomplete wisdom, being positioned in a dynamic setting the place assets can be limited. to meet such complicated necessities, the writer improves, combines, and applies effects from parts like making plans, constraint programming, and native seek. The formal framework built is evaluated by means of program to the sphere of desktop video games, which have compatibility the matter context rather well due to the fact that so much of them are performed in genuine time and supply a hugely interactive atmosphere the place environmental occasions are altering rapidly.

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Constraint-Based Agents: An Architecture for Constraint-Based Modeling and Local-Search-Based Reasoning for Planning and Scheduling in Open and Dynamic Worlds

Self sufficient brokers became a colourful study and improvement subject lately attracting task and a focus from a variety of parts. the fundamental agent notion contains proactive self sustaining devices with goal-directed-behaviour and verbal exchange features. The booklet specializes in self sufficient brokers which can act in a aim directed demeanour less than actual time constraints and incomplete wisdom, being located in a dynamic surroundings the place assets should be constrained.

Extra info for Constraint-Based Agents: An Architecture for Constraint-Based Modeling and Local-Search-Based Reasoning for Planning and Scheduling in Open and Dynamic Worlds

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In contrast, planners like Graphplan [16] create a large maximal structure that includes all potential plans before starting the search process. Superfluous/inconsistent elements are then removed by the search process. The 18 1. Introduction search can exploit these structures much better because propagation can involve the reasoning on parts of the plan for which no decisions have been made. However, maximal structures do not scale well. Other examples of this approach are parcPLAN [50] and CPlan [175].

5 Fig. 17. 2 Aggressive Heuristics The task constraint can also be extended. The current heuristic is very cautious, changing just one variable. After a couple of changes of task positions within a job, it may be useful to make a complete revision of the internal distance relations instead of repairing only one relation. A more aggressive heuristic can add to the former heuristic a recursive repair of all relations of the constraint whose inconsistency has been changed by the improvement (considering only variables that have not already been changed within the improvement step).

The most important difference between our work and these approaches is the ability of the global constraints to exploit domain-specific information by including constraintspecific search control and representation knowledge. In contrast to low-level constraint programming approaches, which correspond rather to SAT- or OR-based approaches, the use of higher-level constraints is more in keeping with the basic intentions of constraint programming. Fine-grained constraints allow a wide application range, but the low-level problem decomposition also deprives the search process of most of the domain-specific knowledge.

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