发明名称 |
Block-level sampling in statistics estimation |
摘要 |
System and apparatus for using block-level sampling for histograms construction as well as distinct-value estimations. For histogram construction, the system implements a two-phase adaptive method in which the sample size required to reach a desired accuracy is decided based on a first phase sample. This method is significantly faster than previous iterative block-level sampling methods proposed for the same problem. For distinct-value estimation, it is shown that existing estimators designed for uniform-random samples may perform very poorly with block-level samples. An exemplary system computes an appropriate subset of a block-level sample that is suitable for use with most existing estimators.
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申请公布号 |
US2005223019(A1) |
申请公布日期 |
2005.10.06 |
申请号 |
US20040814382 |
申请日期 |
2004.03.31 |
申请人 |
MICROSOFT CORPORATION |
发明人 |
DAS GAUTAM;CHAUDHURI SURAJIT;SRIVASTAVA UTKARSH H. |
分类号 |
G06F17/00;(IPC1-7):G06F17/00 |
主分类号 |
G06F17/00 |
代理机构 |
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