Consider the state space search
problem shown to the right. A is
the start state and the shad...
Engineering, 14.07.2020 20:01 emely1139
Consider the state space search
problem shown to the right. A is
the start state and the shaded
states are goals. Arrows encode
possible state transitions, and
numbers by the arrows represent
action costs. Note that state
transitions are directed; for
example, A B is a valid transition,
but B A is not. Numbers shown
in diamonds are heuristic values
that estimate the optimal
(minimal) cost from that node to
a goal.
For each of the following search algorithms, write down the nodes that are
removed from fringe in the course of the search, as well as the final path returned.
Because the original problem graph is a tree, the tree and graph versions of these
algorithms will do the same thing, and you can use either version of the
algorithms to compute your answer.
Assume that the data structure implementations and successor state orderings are all
such that ties are broken alphabetically. For example, a partial plan S β X β A
would be expanded before S β X β B; similarly, S β A β Z would be expanded
before S βB βA.
A) Depth-First Search
B) Breadth-First Search ,
C) Uniform-Cost Search
D) Greedy Search
E) A* Search
Answers: 3
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