Both the ratio of friction velocity to free stream wind velocity and the thickness of airflow are subject to the sidewall effect, showing the increase trend with the decreasing aspect ratios.

随着风洞宽高比的减小，断面内中垂线上的气流摩阻速度与自由流速的比值以及受风洞边壁影响的气流厚度均增大。

youdao

It is a main subject to increase signal to noise ratio of light target and pick up signals effectively so as to diffuse laser shooting simulator.

提高光靶信噪比，有效地拣出信号，成为激光射击模拟器推广应用的重要课题。

youdao

While polyester fiber is subject to different draw ratio and heating temperature during high speed spinning, its original molecular orientation and crystallinity of polyester fiber are changed.

聚酯在高速纺丝过程中，施以不同的拉伸倍数与温度，会造成纤维结晶度与取向度的变化，从而影响纤维的物理性能。

youdao

So they were concerned that they would have been significantly constrained if subject to a higher ratio than overseas competitors.

BBC: Osborne and the safe size for British banks

American commercial banks were subject to a leverage ratio in the run-up to the financial crisis: they still ran into trouble.

ECONOMIST: Simple rules may be best for monitoring banks

There is no graph of the cyclically adjusted price-earnings ratio, another valuation measure, in its presentation book, although the subject did arise in questions at the conference: David Kostin, a strategist, said Wall Street was slightly above fair value on this measure.

ECONOMIST: Two contrary views on the outlook for markets