Model update
    1.
    发明授权
    Model update 失效
    模型更新

    公开(公告)号:US07392157B1

    公开(公告)日:2008-06-24

    申请号:US11591652

    申请日:2006-10-31

    IPC分类号: G06F17/00

    CPC分类号: G06Q30/02 G06Q10/04

    摘要: Methods and apparatuses for updating a forecast model quantifying the marketing of to the demand for a product and/or service are described. An original forecast model created at a reference M is used. An error of the forecast model is determined based on data including an original data and an additional data. At least one parameter is identified to be changed in value in, added to, or removed from the original forecast model. The forecast model is then modified to reduce the error of the forecast model by changing the value of the identified parameter in the forecast model, adding the identified parameter to the original forecast model, and/or removing the identified parameter from the original forecast model.

    摘要翻译: 描述用于更新量化对产品和/或服务的需求的营销的预测模型的方法和装置。 使用在参考M创建的原始预测模型。 基于包括原始数据和附加数据的数据来确定预测模型的误差。 至少一个参数被识别为在原始预测模型中的值,添加到或从其中删除的值。 然后修改预测模型,通过改变预测模型中识别的参数的值,将所识别的参数添加到原始预测模型,和/或从原始预测模型中删除所识别的参数,来减少预测模型的误差。

    Query selectivity estimation with confidence interval
    3.
    发明授权
    Query selectivity estimation with confidence interval 有权
    具有置信区间的查询选择性估计

    公开(公告)号:US07636707B2

    公开(公告)日:2009-12-22

    申请号:US10818730

    申请日:2004-04-06

    IPC分类号: G06F17/30

    摘要: Selectivity estimates are produced that meet a desired confidence threshold. To determine the confidence level of a given selectivity estimate for a query expression, the query expression is evaluated on a sample tuples. A probability density function is derived based on the number of tuples in the sample that satisfy the query expression. The cumulative distribution for the probability density function is solved for the given threshold to determine a selectivity estimate at the given confidence value.

    摘要翻译: 产生满足期望置信阈值的选择性估计。 为了确定查询表达式的给定选择性估计的置信水平,查询表达式将在样本元组上进行求值。 基于满足查询表达式的样本中的元组数量导出概率密度函数。 为给定阈值求解概率密度函数的累积分布,以确定给定置信度值下的选择性估计。