V2EX greedy search

Greedy Search

释义 Definition

贪心搜索:一种搜索策略/算法思想,每一步都选择“当前看起来最优”的选项(局部最优),希望由此得到整体较好的结果;但不一定保证全局最优解。常见于人工智能与算法中的启发式搜索、路径规划、组合优化等场景。

发音 Pronunciation (IPA)

/ridi st/

例句 Examples

Greedy search picks the best option at each step.
贪心搜索在每一步都会选择当前最好的选项。

In some problems, a greedy search finds a good solution quickly, but it may miss the global optimum because it commits too early to local choices.
在某些问题中,贪心搜索能很快找到一个不错的解,但由于过早固定在局部选择上,可能会错过全局最优解。

词源 Etymology

greedy 原意为“贪婪的”,引申为“只看眼前利益/眼前最优”;search 为“搜索”。合在一起,形象地表达了这种方法“每一步都贪图当前最优”的特点。该用法主要在计算机科学语境中固定下来。

相关词 Related Words

文献与作品中的用例 Literary / Notable Works

  • Artificial Intelligence: A Modern Approach(Stuart Russell, Peter Norvig)
  • Introduction to Algorithms(Thomas H. Cormen 等,常称 CLRS)
  • Algorithm Design(Jon Kleinberg, va Tardos)
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