Apparatus and method for calculating the selectivity of a range query for multidimensional data
    1.
    发明授权
    Apparatus and method for calculating the selectivity of a range query for multidimensional data 有权
    用于计算多维数据范围查询的选择性的装置和方法

    公开(公告)号:US08843525B2

    公开(公告)日:2014-09-23

    申请号:US13222754

    申请日:2011-08-31

    IPC分类号: G06F7/00 G06F17/30

    CPC分类号: G06F17/30592 G06F17/30469

    摘要: An apparatus and method for calculating the selectivity of a range query for multidimensional data using a multidimensional histogram are provided. A data space may be partitioned into one or more sub-spaces based on a sum of skew values of the one or more sub-spaces, a space-partitioning tree may be generated for the data space, and a multidimensional histogram may be generated for the data space based on the space-partitioning tree. A range query for multidimensional data may be processed based on the multidimensional histogram.

    摘要翻译: 提供了一种使用多维直方图计算多维数据范围查询的选择性的装置和方法。 可以基于一个或多个子空间的偏差值的和来将数据空间划分为一个或多个子空间,可以为数据空间生成空间划分树,并且可以生成多维直方图 基于空间分区树的数据空间。 可以基于多维直方图来处理多维数据的范围查询。

    Apparatus and method for envelope detection
    2.
    发明授权
    Apparatus and method for envelope detection 有权
    包络检测装置及方法

    公开(公告)号:US08817931B2

    公开(公告)日:2014-08-26

    申请号:US13481998

    申请日:2012-05-29

    IPC分类号: H04L27/22

    摘要: An apparatus and a method are described for envelope detection used in fields including voice processing, image processing, data communication, and energy/data transmission. The apparatus and the method for envelope detection eliminate a carrier component from a modulated signal by performing a square-sum operation between two adjacent sampling signals among signals sampled from the modulated signal. The apparatus and the method detect an envelope of the modulated signal from the modulated signal in which the carrier component is eliminated.

    摘要翻译: 描述了用于包括语音处理,图像处理,数据通信和能量/数据传输的领域中的包络检测的装置和方法。 用于包络检测的装置和方法通过在从调制信号采样的信号之间执行两个相邻采样信号之间的平方和运算,从调制信号中消除载波分量。 该装置和方法从消除载波分量的调制信号中检测调制信号的包络。