提出了将谱元方法应用到极坐标系下，利用极坐标系下的谱元方法求解环形空间内自然对流问题。

The computation of natural convection in the annulus between horizontal concentric cylinders using spectral element method in polar coordinates is presented in this paper.

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用该方法代替FDS软件中的亚格子应力模式构造的DES求解器被用来对湍流强迫对流问题和单室火灾问题进行数值模拟。

The FDS software package was used as the numerical framework for the DES solver, which was then used to simulate a typical forced convection problem.

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MapReduce在映射阶段将一个问题分解为数百万个并行计算，并生成键-值对流作为输出。

MapReduce breaks down a problem into millions of parallel computations in the Map phase, producing as its output a stream of key-value pairs.

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