倒排索引中的文檔序號重排技術(shù)綜述
[Abstract]:As the core index technology of text search, inverted index is widely used in search engine, desktop search and digital library. The inverted index is composed of a dictionary and a corresponding inverted table. The inverted table is compressed by difference storage and integer coding. The results show that when the inverted table has good local continuity, the method can obtain high compressibility. Integer coding makes full use of the local continuity characteristics of inverted tables by continuously improving the coding algorithm, and document sequence number rearrangement is a technique to produce local continuity by rearranging document sequence numbers. The index compression ratio is greatly improved by document number rearrangement. This paper mainly introduces the research achievements of document ordinal number rearrangement technology in recent years: firstly, introduces the basic principle of index compression, then introduces document sequence number rearrangement technology in detail, including analysis, compares the advantages and disadvantages of each method; Finally, the document number rearrangement technology is summarized, collated and prospected.
【作者單位】: 國家計(jì)算機(jī)網(wǎng)絡(luò)應(yīng)急技術(shù)處理協(xié)調(diào)中心;中國科學(xué)院信息工程研究所;
【基金】:國家973重點(diǎn)基礎(chǔ)研究發(fā)展規(guī)劃項(xiàng)目(2011CB302605) 科技支撐計(jì)劃(2012BAH47B04)
【分類號】:TP391.3
【共引文獻(xiàn)】
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