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    • 32. 发明申请
    • Consistent histogram maintenance using query feedback
    • 使用查询反馈进行一致的直方图维护
    • US20070078808A1
    • 2007-04-05
    • US11239044
    • 2005-09-30
    • Peter HaasVolker MarklNimrod MegiddoUtkarsh Srivastava
    • Peter HaasVolker MarklNimrod MegiddoUtkarsh Srivastava
    • G06F17/30
    • G06F17/30536
    • A novel method is employed for collecting optimizer statistics for optimizing database queries by gathering feedback from the query execution engine about the observed cardinality of predicates and constructing and maintaining multidimensional histograms. This makes use of the correlation between data columns without employing an inefficient data scan. The maximum entropy principle is used to approximate the true data distribution by a histogram distribution that is as “simple” as possible while being consistent with the observed predicate cardinalities. Changes in the underlying data are readily adapted to, automatically detecting and eliminating inconsistent feedback information in an efficient manner. The size of the histogram is controlled by retaining only the most “important” feedback.
    • 采用一种新颖的方法来收集优化器统计数据,以优化数据库查询,方法是从查询执行引擎收集有关观察到的谓词的基数并构建和维护多维直方图的反馈。 这使得利用数据列之间的相关性而不采用低效的数据扫描。 最大熵原理用于通过尽可能“简单”的直方图分布近似真实数据分布,同时与观察到的谓词基数一致。 底层数据的变化很容易适应于以有效的方式自动检测和消除不一致的反馈信息。 通过仅保留最重要的反馈来控制直方图的大小。
    • 37. 发明授权
    • Method of controlling access to a transmission channel jointly used by a
plurality of data sources
    • 控制对由多个数据源共同使用的传输信道的访问的方法
    • US6122286A
    • 2000-09-19
    • US174732
    • 1998-10-19
    • Peter Haas
    • Peter Haas
    • H04J3/02H04L12/413
    • H04L12/413
    • The method deals with the transmission of data frames that comprise address information, useful data, and a check sequence, through a transmission channel. The data sources evaluate a data collision signal whose value corresponds to the logic AND combination of all the output signals of all the data sources using the transmission channel. Each data source transmits, between two data frames, an idle bit sequence, which is given by a sequence of logic one values in the event of non-identity between the output signal of the data source and the data collision signal, and is given by a FLAG signal after the complete transmission of a data frame or after the abortion of the transmission of a data frame or if the data collision signal contained in direct succession a larger number of logic one values than the transmission abort signal.
    • 该方法通过传输信道处理包括地址信息,有用数据和检查序列的数据帧的传输。 数据源评估数据冲突信号,该数据冲突信号的值对应于使用传输通道的所有数据源的所有输出信号的逻辑与组合。 每个数据源在两个数据帧之间传输空闲位序列,该空闲位序列由数据源的输出信号与数据冲突信号之间的非同一性的逻辑序列中的一个值给出,并由下式给出: 完整传输数据帧之后的FLAG信号或数据帧的传输流失后,或者直接连续包含的数据冲突信号比传输中止信号大一个逻辑值。
    • 38. 发明授权
    • Belt buckle with fastener fitting
    • 带扣与紧固件配件
    • US5855047A
    • 1999-01-05
    • US006940
    • 1998-01-14
    • Peter Haas
    • Peter Haas
    • B60R22/12B60R22/18B60R22/22B60R22/24B60R22/20A44B11/00
    • B60R22/22B60R2022/1806Y10T24/4589
    • A belt buckle with a fastener fitting for vehicle-fixed mounting comprising a carrier plate fixedly connected to the belt buckle. The carrier plate being connected to the fastener fitting. The carrier plate includes an opening by which the carrier plate is mounted rotatably on a pin extending through the opening and fixed to the fastener fitting. A return element is provided which urges the belt buckle relative to the fastener fitting rotationally about the centerline of the pin and rotationally about an axis perpendicular to the centerline of the pin and to the longitudinal axis of the belt buckle into a resting position. For the belt buckle being, for one thing, movable with respect to the fastener fitting, so that it can either be oriented at any time in a position optimal for the function or it permits being moved from a temporarily unwanted position, and for another, the belt buckle automatically returned after such a maladjustment into a resting position which is optimal for introducing the insert tongue into the belt buckle, the opening in the carrier plate is an elongated hole, the longitudinal axis which is roughly parallel to the longitudinal axis of the belt buckle, and the return element further urges the belt buckle into a resting position relative to the fastener fitting translationally in a direction parallel to the longitudinal axis of the belt buckle.
    • 一种具有用于车辆固定安装的紧固件配件的带扣,包括固定地连接到带扣的承载板。 承载板连接到紧固件配件。 承载板包括开口,通过该开口,承载板可旋转地安装在延伸穿过开口并且固定到紧固件配件的销上。 提供了一种返回元件,该元件相对于紧固件配件相对于销的中心线旋转地推动带扣,并且围绕垂直于销的中心线的轴线旋转地旋转并且将带扣的纵向轴线旋转到静止位置。 因为皮带扣一方面可以相对于紧固件配件移动,使得它可以在任何时候被定位在对于该功能最佳的位置,或者允许从临时不期望的位置移动,另一方面, 在这种失调后,皮带扣自动返回到最适于将插入舌片引入皮带扣中的静止位置,承载板中的开口是长孔,该纵向轴线大致平行于纵向轴线 带扣,并且返回元件进一步促使带扣相对于紧固件配件在平行于带扣的纵向轴线的方向上平移地进入静止位置。