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We have actually implemented a tool that accepts descriptions of
problems in Functional Strips and compiles them into state space search procedures. The heuristic function used by these procedures is supplied by the user in the form of a C routine. This tool can be seen as a domain-dependent planner in the style of TLPLAN (BK98) but while in TLPLAN the control knowledge is expressed in a logical language, in this tool, the control knowledge is expressed in the form of an heuris tic function. Recent heuristic search planners like HSP are based on a similar idea but rather than relying on a user-supplied heuristic func tion, they extract the heuristic function automatically from the problem description. We elaborate on this below.
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