Therefore, it is quite a meaningful work to establish a CFD method for implementing the compressor's design, optimization and the flow characteristic map calculation.
为此，可利用CFD的方法建立一个压气机的数值计算方案，实现压气机结构设计、优化及压气机流量特性图计算的目的。
MapReduce applications must have the characteristic of "Map" and "Reduce," meaning that the task or job can be divided into smaller pieces to be processed in parallel.
MapReduce应用程序必须具备“映射”和“缩减”的性质，也就是说任务或作业可以分割为小片段以进行并行处理。
This thesis deals with the necessity of establishing the standards of the digital map of GIS, discussing the characteristic and brings about a data structure of the GIS-oriented digital map.
论述了制订面向GIS数字地图标准的必要性和紧迫性，探讨了面向GIS数字地图的特点，最后提出了一种面向GIS数字地图的数据结构。
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