MetroMirror用于对数据进行第一次备份，再由Global Mirror复制第一次备份作为第二次备份。
Metro Mirror is used to replicate to the first backup, and then Global Mirror is used to replicate from the first backup to a second backup.
在工作中能运用高等数学概念，如指数，对数，二次方程序和排列。
Ability to apply advanced mathematical concepts such as exponents, logarithms, quadratic equations, and permutations.
在双对数坐标系中，由低孔隙到高孔隙整个范围，砂岩地层因素与孔隙率的关系为一个二次函数。
It was found that in double logarithmic coordinates, the relationship of formation factor and porosity is a second order function and no longer the linear formula proposed by Archie in 1940's.
根据测井生产中的对数据加以管理的实际需求，本文简要地论述了设计一个小型、易于移植和可供二次开发的数据库管理系统的设计和实现方法。
This article is devoted to the design and implementation of a small, portable and ease to handle DBMS, according to the real need of the management to data used in well logging.
通过对数据的二次转换，可以用间歇聚合反应的小试数据模拟工业规模的连续聚合反应过程。
The continuous industrial reaction can be modeled the data from batch process. But the data would be inverted in twice.
分析前后二次问卷配对数据的相关性和差异显著性。
The correlation and differences between the paired data were analyzed for their statistical significance.
根据火焰切割机的加工工艺要求，要对数控代码进行二次处理——对数控程序进行转换或在原有的数控程序中添加代码。
According to the technologic characteristics of the flame cutting machine, the NC codes need to be re-disposed, that is to add NC codes among the original NC codes or transform the original NC codes.
底部内区流速分布可用对数公式表示；外区和表面区可用二次抛物线公式表示。
Velocity distribution can be expressed by a logarithmic formula for the inner zone and a parabolic formula for outer and surface zones.
本文引入对数距离路径损耗模型作为LANDMARC的补充进行二次定位，通过对TOPK参考标签进行二次筛选，来实现定位精确度的提升。
We used Logarithmic Distance Path Loss Model to locate after LANDMARC and filter reference labels of TOP K second time. Finally we promoted the precision of location.
剔除并补正了飞行实验数据中的野值；设计了一个低通滤波器来滤除数据中的高频噪声；用中心插值演算法对数据二次平滑。
Then a low pass filter is designed to filter high - frequency noise in data. and smooth data again by means of central interpolation algorithm ;
剔除并补正了飞行实验数据中的野值；设计了一个低通滤波器来滤除数据中的高频噪声；用中心插值演算法对数据二次平滑。
Then a low pass filter is designed to filter high - frequency noise in data. and smooth data again by means of central interpolation algorithm ;
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