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    • 4. 发明授权
    • Data compression method and apparatus
    • 数据压缩方法及装置
    • US07720878B2
    • 2010-05-18
    • US11110554
    • 2005-04-20
    • Donald F CaldwellKenneth Ward ChurchGlenn Stephen Fowler
    • Donald F CaldwellKenneth Ward ChurchGlenn Stephen Fowler
    • G06F17/30
    • H03M7/30G06F17/30286H03M7/3084Y10S707/99942
    • An improved data compression method and apparatus is provided, particularly with regard to the compression of data in tabular form such as database records. The present invention achieves improved compression ratios by utilizing metadata to transform the data in a manner that optimizes known compression techniques. In one embodiment of the invention, a schema is generated which is utilized to reorder and partition the data into low entropy and high entropy portions which are separately compressed by conventional compression methods. The high entropy portion is further reordered and partitioned to take advantage of row and column dependencies in the data. The present invention enables not only much greater compression ratios but increased speed than is achieved by compressing the untransformed data.
    • 提供了一种改进的数据压缩方法和装置,特别是关于诸如数据库记录的表格形式的数据的压缩。 本发明通过利用元数据以优化已知压缩技术的方式来变换数据来实现改进的压缩比。 在本发明的一个实施例中,生成了用于重新排序和分割数据到低熵和高熵部分的模式,这些部分由常规压缩方法分开压缩。 高熵部分被进一步重新排序并分区以利用数据中的行和列依赖性。 本发明不仅能够通过压缩未转换的数据而实现更大的压缩比,而且增加速度。
    • 7. 发明授权
    • Sponsored search data structure
    • 赞助搜索数据结构
    • US08606627B2
    • 2013-12-10
    • US12137567
    • 2008-06-12
    • Arnd Christian KönigMartin Miroslavov MarkovKenneth Ward Church
    • Arnd Christian KönigMartin Miroslavov MarkovKenneth Ward Church
    • G06Q40/00G07G1/14
    • G06Q30/02G06Q30/0246G06Q30/0256
    • A system that facilitates selecting advertisements that match a search query is described herein. The system includes a search query receiver component that receives a search query including keywords. The system also includes a match component that uses an associative data structure to identify in the associative data structure one or more data nodes that are associated in the associative data structure with respective unique keys corresponding to respective one or more hashes of combinations of the keywords in the search query. For each identified data node, the match component selects advertisements associated with bid phrases stored in the identified data node that respectively only include keywords included in the search query.
    • 这里描述了便于选择与搜索查询匹配的广告的系统。 该系统包括接收包括关键字的搜索查询的搜索查询接收器组件。 该系统还包括匹配组件,其使用关联数据结构来在关联数据结构中标识在关联数据结构中关联的一个或多个数据节点以及相应的唯一密钥,该唯一密钥对应于关键字的组合的相应一个或多个哈希值 搜索查询。 对于每个识别的数据节点,匹配组件选择与标识数据节点中存储的分别仅包括在搜索查询中的关键字相关联的出价短语相关联的广告。