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Adaptive

Struct Adaptive 

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pub struct Adaptive { /* private fields */ }
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自适应爬取的状态:每个查询词的证据数、已经见过的相关段落、连续没有新信息的页数。

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impl Adaptive

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pub fn new(opts: AdaptiveOptions, terms: usize) -> Adaptive

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pub fn coverage(&self) -> f64

覆盖度:各查询词 min(1, 证据 / evidencePerTerm) 的平均值。

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pub fn evidence(&self) -> &[usize]

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pub fn has_found(&self) -> bool

已经有过收获(某一页带来了新的切题内容)。

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pub fn covered(&self) -> bool

查询已经覆盖:覆盖度到阈值,而且至少两页贡献过证据。

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pub fn last_fresh(&self) -> bool

上一次 Self::observe 的页面带来了新的切题内容(有收获)。

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pub fn stale(&self) -> usize

连续没有新信息的页数。

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pub fn forgive(&mut self)

撤销“连续没有新信息“的计数:队列里还有分数高的链接没抓时,不能因为先抓完的那几页没用就停。

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pub fn observe( &mut self, query: &Query, markdown: &str, relevance: f32, blind: bool, ) -> Option<&'static str>

记下一页的正文(relevance 是这一页的相关度);信息够了时返回停止原因。 blind 说这一页是不是“盲探“来的:链接本身没有查询词的线索,分数只是栏目保底分 (见 super::is_blind)。

还没有收获时,无关页不算“没有新信息“(门户、新闻集群挡在前面是常态),但连着 2 × patience 页都是盲探、都无关,就是站点上找不到查询的线索:停(no_relevant_pages)。 一路有线索的链接可走时不停,那是内容藏得深,不是没有内容。

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