结合探针信号的自相关函数，研究流场湍流结构，发现近尾可能存在大涡拟序结构，而在远尾则没有湍流。
By studying the autocorrelation function of the probe signal, it is found that the large eddy quasi ordering structure likely exists in near wake, but there is no turbulence in far wake.
紊流边界层拟序结构，是近几十年来紊流研究中最重要的发现，也是目前紊流研究中的一大热点问题。
The coherent structure of turbulent boundary layer is the most important discover and the most interesting problem of turbulence research in the last several decades.
本文用广义逆速率模型及拟稳速率模型处理了祁连山与河西走廊地区近20年来的水准测量资料。
Using the generalized inverse and substationary rate model, this paper analyses the geodetic levelling data of recent 20 years in Qilian and Hexi area.
模糊拟阵是将“模糊”的概念引入到拟阵理论中而建立起来的理论，已有近20年的历史。
Fuzzy matroids is a theory which is set up by introducing the notion "fuzzy" into theory of matroid, it has existed nearly 20 years old.
模糊拟阵是将“模糊”的概念引入到拟阵理论中而建立起来的理论，已有近20年的历史。
Fuzzy matroids is a theory which is set up by introducing the notion "fuzzy" into theory of matroid, it has existed nearly 20 years old.
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