DB 2优化器使用目录统计信息来确定最佳的访问路径，而更新这些目录统计信息所采用的主要方法就是运行RUNSTATS实用程序。
The DB2 optimizer USES catalog statistics to determine the best access path, and the main method employed to update these catalog statistics is to run the RUNSTATS utility.
目的评价由倾向指数方法得到的暴露效果的估计量和统计性质，并探讨其实用性。
Objective to evaluate the statistical property of the estimators on exposure effect and value of propensity score methods in practical use.
采用粉尘浓度统计值建立GM(1,1)模型，进而对粉尘浓度进行预测，说明这种方法的有效性和实用性。
This paper establishes a GM (1, 1) model from the statistical data to predict the dust concentration. It is proven that the method is effective and practical.
本文以建立实用的英汉机器翻译系统为目的，对采用规则和统计相结合的机译方法进行了有益的研究和尝试。
This brings a good opportunity for machine translation. The object of this paper is to construct a practical English to Chinese machine translation system .
由此证实了运用数理统计方法诊断刨花板厚度偏差形成原因的实用性和可靠性。
The above results have confirmed the practicality and reliability of using statistical methods to diagnose the factors of thickness variation control in particleboard.
只有充分了解科研设计的方法，分清资料的类型，才能在众多的统计分析方法中找到简单实用的方法。
Therefore only with a full comprehension of the design methods and the data types can we figure out a simple and practical means from diverse statistical analysis methods.
科学法庭系列，用好玩又实用的方法，介绍统计的概念。
Teaches the concept of statistics in a fun, informative way.
讨论了实用性均化系数统计计算的影响因素，以实例说明了计算方法。
The influential factors of the blending factor were discussed and the calculation method was illustrated.
可见，应用人工神经网络模拟区域贫困化简便、实用，避免了传统的单纯依靠统计数据进行贫困化研究的做法，是一种可行的方法与技术途径。
The results also indicate that application of BP neural network to simulating regional poverty is convenient, precise and feasible, which can be an alternative approach to simulating regional poverty.
以实例说明尺寸误差合格性的统计判断和尺寸公差的统计计算方法。为推广统计公差新标准提供一种实用的方法。
A new method for judging the qualification of size tolerance isdescribed. An actual example is included to illustrate the method.
统计检验结果表明，两种方法的测定数据组均无异常值并遵从正态分布，因此两种测定方法均具有实用性。
Statistical inspection results showed that the two groups of measuring data determined respectively by GC and UV were in compliance with normal distribution, therefore, both methods are practical.
利用197 6 - 2002年期间对湛江地区造成灾害的多场台风风暴潮的灾情统计资料进行了实证分析，结果表明该方法是实用的、有效的。
An actual example analysis using disaster statistics of storm surges having struck Zhanjiang area from 1976 to 2002 demonstrates the feasibility and effectiveness of this method.
本文叙述了利用网络信息计量学方法和计算机技术，研究出经济实用的图书馆网络读者访问流量统计分析系统，该系统经实际应用证明可以高效、准确地描述网络读者访问情况。
Based on the modern computer techniques and e-Metric, an economical and practical network reader flux statistical analysis system is developed by us on present paper. The efficiency and accuracy...
本文叙述了利用网络信息计量学方法和计算机技术，研究出经济实用的图书馆网络读者访问流量统计分析系统，该系统经实际应用证明可以高效、准确地描述网络读者访问情况。
Based on the modern computer techniques and e-Metric, an economical and practical network reader flux statistical analysis system is developed by us on present paper. The efficiency and accuracy...
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