August 2017
Intermediate to advanced
360 pages
8h 35m
Chinese
Content preview from 算法技术手册（原书第2 版）
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AI
寻路
｜
203
AI
寻路
图 7-26：随机位置的搜索树对比
三种搜索都有可能需要检查指数级的状态，但由于
h
(
n
)
函数计算出的启发式信息，
A*
搜索
将搜索最少的状态。
解决移动
n
2
－
1
个方块这样的问题不是只有寻路这种方法。
Parberry
（
1995
）提出了一
种别出心裁的方法，即使用分治思想。也就是说，给定一个
n
×
n
数码，
n
> 3
，首先完
成最左边的列和最上部的行，然后递归解决
(
n
－
1)
2
－
1
数码问题。当归结为一个
3
×
3
的问题时，这 就可以简单地使用穷举解法来解决。这个方法保证能在
5
×
n
3
步内找到解。
7.11 参考文献
Barr, A. and E. Feigenbaum,
The Handbook of Arti cial Intelligence
. William Kaufmann,
Inc., 1981.
204
｜
第
7
章
Berlekamp, E. and D. Wolfe,
Mathematical Go:
Chilling Gets the Last Point
. A K Peters/
CRC Press, 1994.
Botea, A., M. Müller, and J. Schaeffer,
“
Near optimal hierarchical path-finding, ...
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