... approximate stationarity 近似固定性 non-stationarity 非定常性 ; 非平稳性 the problem of stationarity 做稳定性问题 ...
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变异的非定常性 Nonconstancy of variability
The experimental results indicate that under large positive attack angle, the flow is totally unsteady.
实验结果表明,在大正攻角情况下,直、弯扩压叶栅内的流动呈现很强的非定常性,同一位置不同时刻流场的流动特点差异较大。
参考来源 - 直弯扩压叶栅内旋涡结构PIV研究·2,447,543篇论文数据，部分数据来源于NoteExpress
后向台阶流的流场同时具有非定常性和定常性的特性。
It is indicated that the flow field over a backward facing step possesses simultaneously the characteristic of non-steady flow and steady flow.
结果表明流动非定常性产生额外损失，滞回现象存在于叶轮机中。
The results indicate that the flow unsteadiness bring out extra losses, and time lag phenomena are evident in many circumstances.
它是一个复合向量，具有明显的空间分布的非均一性和随时间变化的非定常性。
It is a complex vector which have obvious heterogeneity of the distribution in space and a variability with time.
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