Cardinality estimation is a process by which the optimizer USES statistics to determine the size of partial query results after predicates are applied or aggregation is performed.
基数估计是这样一种过程：在应用了谓词或执行了聚集之后，优化器使用统计信息确定部分查询结果的大小。
This includes information such as response time, an SQL statement's count of that transaction, cost estimation, sorting statistics, locking related details, and so on.
这些信息包括响应时间、此事务的sql语句计数、估计的成本、排序统计数据、与锁相关的详细信息等等。
So it is obvious that the accuracy of selectivity estimation depends upon how often you run UPDATE STATISTICS.
因此，选择性估算的准确性显然基于您运行UPDATESTATISTICS的频率。
For each predicate in the query, query Tuner adds statistics annotations for the referenced columns in the predicate and also the cost estimation for the predicate.
对于查询中的每个谓词，QueryTuner为谓词中的引用行和谓词的成本评估添加了统计数据注释。
Methods This parameter estimation method is introduced by being combined with distribution hypothesis and robust statistics.
方法结合分布假设和稳健统计给出了参数估计方法。
The problem of statistics and estimation of disaster economic phenomena is an important prerequisite for the study of systematic engineering of natural disaster reduction and disaster economics.
灾害经济现象的统计与评估问题，是开展减灾系统工程及进行灾害经济学研究的重要前提。
Statistics no involving an estimation of '.
与统计值的参数估算无关的。
Through robust statistics, put forward a robust estimation algorithm to estimate measuring results and error.
通过鲁棒统计，提出了一个鲁棒估计算法处理测量结果和误差。
The limitation of geological conditions is important to model a deposit. The geological statistics methods are effective for ore grade estimation and reserve classification.
地质控制条件限制是矿床建模的重要手段， 地质统计学方法是矿块品位估计以及储量分级等的有效方法。
The field of capture-recapture and removal is an important direction of mathematical statistics, which studies the estimation of the sizes of finite populations from incomplete random samples.
捕获再捕获与捕获移出研究是数理统计的一个重要方向，它研究如何利用随机样本估计有限群体的总体数目。
This parameter estimation method was introduced by combination of distribution hypothesis with robust statistics.
方法：结合分布假设和稳健统计给出了参数估计方法。
In this paper, empirical Euclidean likelihood ratio statistics are constructed for parametric in a nonlinear model. And prove strong consistency and asymptotic normality of the estimation.
本文构造了非线性模型中参数的经验欧氏似然比统计量，并证明了该似然估计的强相合性和渐近正态性。
One of the primary applications of higher order statistics has been for the time delay estimation of non-Gaussian signal in Gaussian spatially correlated noise.
高阶统计量在信号处理中成功的应用例子之一是估计高斯相关噪声中非高斯信号的时延参数。
Objective: the purpose of this study was to compare the performance of regression on order statistics(ROS) and substitution methods in estimation of nondetects.
目的：比较用于处理包含未检出值的痕量测定数据的次序统计量回归方法与经典替换方法的估计效果。
A new rapid line search method based on robust statistics is presented in this paper, which could be used in global motion estimation between consecutive video frames for speeding up objective.
本文中作者提出了一种新的基于鲁棒统计的快速线搜索方法，可以用于图象帧间主运动估计，能够提高算法速度。
Estimation of unknown noise statistics quantity and estimation of signal states are alternatively done, this method is applied to GPS positioning, Computer simulation shows the approach is efficient.
将未知噪声统计量的估计与信号状态估计交替进行的算法引入G P S定位，计算机模拟结果表明效果很好。
This paper deals with the closed form recursive estimation for parameters of almost periodic moving average (APMA) signal using higher order cyclic statistics.
本文利用高阶循环统计量讨论几乎周期滑动平均(apma)信号参数的闭式递推估计。
Especially the latest fast estimation method, then expands it on this base, ratiocinates the recursive algorithm based on extreme order statistics, realizing the dynamic estimation of parameters.
特别是最新的快速估计方法，并在其基础上进行了扩展，推导出基于极端顺序统计量的递推算法，实现了参数的动态估计。
Adaptive LP estimation theory and its solution method are introduced in this paper. statistics of SLR data is also done.
本文简要介绍了自适应Lp估计的有关理论和求解方法，并对SLR数据的测量误差作了统计分析。
Import magnitude reconstruct method to estimation wavelet base on high-order statistics after phase estimation theory, and perfecting the method of estimation wavelet though high-order statistics.
继高阶统计地震子波相位估计方法之后，将基于高阶统计的幅值重构方法也引入其中，从而完成了完整的高阶统计地震子波估计理论。
The elementary statistics include the statistics concept, data collection and analysis, estimation and hypothesis testing, analysis of variance, regression etc.
本课程包括统计基本概念、统计资料收集及分析、基本机率分配、估计与检定、变异数分析、线性回归等。
The wavelet subband coefficients of images have highly non Gaussian statistics that may be modeled with generalized Laplacian distributions, and Bayesian estimation is used to suppress noise.
图像的小波系数具有很强的非高斯统计特性，可以建立推广的拉普拉斯先验分布，用贝叶斯估计对图像小波系数滤波来达到降噪目的。
In this paper, a new method of phase errors estimation based on higher order statistics is proposed for SAR imagery autofocus.
提出了一种基于高阶统计量分析的相位误差估计算法，用于SAR图像自聚焦。
This paper studies a statistical seismic wavelet estimation method, which based on higher order statistics and the hybrid ant colony algorithm.
本文重点研究了统计性方法中，基于高阶统计量及混合蚁群算法的地震子波估计方法。
Probability statistics for multipath delay of multi-frame was introduced to improve the performance of multipath estimation.
引入多帧联合统计，以提高多径时延估计精度。
Grey statistics method is more objective and reliable comparing with fuzzy hierarchy estimation, thus it is an ideal method for optimization of project schemes.
比较这两种方法，灰色统计评估法比模糊层次评价法更客观可靠，是一种比较理想的项目方案优化方法。
A novel method for estimation of original flow length distributions from sampled flow statistics is proposed to obtain the distribution feature of unsampled flows.
为了得到未抽样流的分布特征，提出一种新的由抽样报文流数据来估计原始未抽样流长度分布的方法。
Such as parameter estimation types of statistics distribution tests of distribution hypothesis methods of linear-second order moment, ect.
数理统计学原理主要包括：参数估计、统计分布类型、分布拟合检验； 工程结构可靠度理论主要介绍了一次二阶矩方法。
The theory and methods of mathematical statistics were used to optimal estimation, testing and analysis on data of radar accuracy testing. The problem of decision making and testing were solved.
运用数理统计的理论、观点和方法对制导雷达精度检验中的数据进行了最优估计、检验和分析，解决了雷达精度的检验、判定和决策问题。
The theory and methods of mathematical statistics were used to optimal estimation, testing and analysis on data of radar accuracy testing. The problem of decision making and testing were solved.
运用数理统计的理论、观点和方法对制导雷达精度检验中的数据进行了最优估计、检验和分析，解决了雷达精度的检验、判定和决策问题。
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