The filter factor indicates how selective the predicate is.
过滤因子表示谓词的选择性有多强。
FF (see number 6 in Figure 5) : Filter factor for the predicate.
FF(见图5中6):谓词的过滤因子。
The noise will be effectively oppressed if filter factor is added to the data involved noise.
对于含有噪声的数据,加入滤波因子可以在一定程度上抑制噪声。
The query annotation for this predicate shows that the predicate filter factor (FF) is 0.000014, or 0.0014%.
此谓词的查询注释显示谓词过滤因子(FF)是0.000014,或0.0014%。
The Filter factor for each predicate indicates the proportion of data the optimizer estimates will satisfy the predicate.
每个断言的筛选因子表示优化器估计符合断言的数据的比例。
For SQL statements with variables, the optimizer USES a default filter factor to determine the best access path at bind time.
对于带变量的sql语句,优化器会使用一个默认过滤因子在绑定时确定最佳访问路径。
The filter factor is a number between 0 and 1 that estimates the proportion of rows in a table for which the predicate is true.
过滤因子是0到1之间的一个数值,它用来评估表中谓词为真的行所占的比例。
To understand how the optimizer ends up with 0.0014% as the filter factor, first look at the six elements in the IN list predicate.
为了了解优化器如何最终以 0.0014%作为过滤因子,首先要查看在IN清单谓词上的6 个元素。
The estimate for QUALIFIED_ROWS is obtained by multiplying the table cardinality (560,273 records) by the predicate filter factor (0.0014%).
用表基数(560,273条记录)与谓词过滤因子 (0.0014%) 相乘就获得了 QUALIFIED_ROWS的估计值。
If you want to further see if the filter factor estimates at TBSCAN (3) make sense, you should generate a count for each predicate individually. For example.
如果希望进一步看看TBSCAN(3)估计的筛选因子是否合理,应该分别对每个断言生成计数。
Since it is a range predicate and there are no frequency and histogram statistics available, the filter factor is calculated with the basic statistics information HIGH2KEY and LOW2KEY.
由于它是范围谓词,而且没有频度和直方图统计数据可用,过滤因子是用基础统计信息HIGH2KEY和LOW2KEY计算得出的。
According to the annotation information in the figure, the table reference CUST_CUSTOMER (CCUS) has two local predicates which are very selective, with filter factor 0.00727 and 0.004, respectively.
根据图中的注释信息,优先表CUST_CUSTOMER (CCUS)有两个本地谓词,其选择性很强,各自的过滤因子分别是0.00727和0.004。
Based on T type filter, the new ballast can achieve a wide dimming range with a very narrow frequency variation range, and it can operate with low lamp current crest factor.
基于T型滤波器的调光方法,能在很窄的工作频率范围内实现深度调光,同时具有灯电流波峰因数低的优点。
In this case, I'm asking it to filter the range of Numbers from 1 to (number + 1), using the is-factor?
本例中,我让它过滤从1到(number + 1)范围的数字,使用is - factor ?
Each ladder input's weighting factor corresponds to one of the digital filter tap coefficients.
每个梯形输入的加权因数与一个数字滤波器抽头系数对应。
Hence, a filter could be designed to increase power factor of traction substation and decrease the harmonic currents.
因此,合理设计滤波器,可使牵引变电站的功率因数及谐波同时满足要求。
In this dissertation, matched filter and orthogonal variable spreading factor are investigated.
论文对匹配滤波器和正交可变扩频因子作了研究。
Based on the prime radix DFT and number theory, an algorithm using the second order recursive filter and the zero factor prime radix Fourier Transform (ZFT) is presented.
从素基数DFT出发,应用数论理论讨论了一种应用二阶递归滤波结构的算法及零因子转换算法(ZFT)。
The selection of harmonic inspection and control method for active filter and certainty of last added compensation capacity and quality factor were expounded.
阐述了有源滤波部分谐波检测与控制方案的选取、新增补偿容量与品质因数的确定。
A new group of adaptive estimation method of Kalman filter fading factor was developed.
提出了一种衰减记忆卡尔曼滤波中衰减因子的自适应估计方法。
Moreover, plenty of effective language input is a contributing factor for language acquisition, while the affective filter is a limiting factor for language acquisition.
另外大量有效的语言输入是习得语言的促进因素,情感过滤则是习得语言的限制因素。
In the new algorithm, a time-variant forgetting factor is introduced to estimate the Mean Square Er-ror (MSE) and change the updating direction of adaptive filter coefficient vector.
新算法使用时变遗忘因子对误差进行指数加权平均来估计均方误差,并使用该因子改变自适应迭代过程中滤波器系数向量的更新方向。
This paper briefly introduces the principles of MF10 switched capacitor filter andpasentes the method of computing quality factor and external resistors.
本文简述了MF10开关电容滤波器的工作原理。介绍了利用MF10组成滤波器品质因数和外接电阻的计算方法。
Using improved Kalman filter to forecast and track. Kalman gain is improved through variable forgetting factor which will avoid the accumulation of errors.
卡尔曼增益通过变遗忘因子进行改进,避免误差的累积。
Trust is also an affective factor which works directly on the thickness of the filter, so it should be regarded as the forth important factor in addition to motivation, confidence and anxiety.
信任度也是一种情感因素,并直接影响过滤网的厚度,应被视为除动机、自信、焦虑外的第四种重要因素。
Reliable estimates of the anelastic attenuation factor, Q, are desirable for improvement of resolution through inverse Q filter and to facilitate amplitude analysis.
黏弹性衰减因子Q的可靠估计可通过Q反褶积来提高地震资料的分辨率并有助于振幅分析。
The on-line filter in the same way as average powers can be designed with given program. The power is the filtering factor designed on the basis of noise property.
用该程序可以设计出与加权平均形式相同的在线数字滤波器,所加的权是根据噪声的性质设计的归一化的滤波因子。
The impact factor of the performance of HEPA air filter is analyzed according to the data drawn from the testing result of air filter examining system.
根据高效空气过滤器检测结果,分析了影响过滤器性能的几个主要因素。
The simple vector filter has simple principle that is use achromatic factor to extract traffic sign colors.
简单向量滤波器原理简单,利用单色提取因子,提取标志颜色。
The paper presents the multi-variable least square method to determine the optimal factor of data smoothing and its amplitude-frequency characteristics and compares it with the general filter.
本文提出了一种利用多变量最小二乘法确定最佳数据平滑因子的方法,建立了优化平滑器特性的数学模型。
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