查询词典 flutter board

According to the opening or closing spiracle , a typical discontinuous gas exchange cycle has three distinct phases: the closed period with little or no external gas exchange, the flutter period during which oxygen enters tracheae and little CO (2) escapes and the open period during which lots of CO (2) escape.

根据气门开闭，一个典型的不连续气体交换循环(discontinuousgas exchange cycle， DGC)可以明显分为3个阶段：关闭阶段，极少或没有气体交换；颤动阶段，气门迅速微开和关闭， O2进入气管，少量CO2释放；最后是开放阶段，大量的CO2释放。

The Galerkin-finite strip method which is used to solve the flutter problems of plates is proposed.

提出了一种求解板的颤振失稳问题的Galerkin—有限条法。

Thirdly, the subsonic, transonic and supersonic flutter critical speed of wings and aircraft is numerically simulated. Some numerical results are in good agreement with experimental data.

分别以某后掠机翼和超临界机翼为算例，对机翼的静气动弹性问题以及基于静气动弹性的型架外形优化设计和飞行姿态确定进行研究，计算结果和有关文献的结果进行了比较，吻合很好。

Some design methods of active flutter suppression system are studied in this dissertation.

本文研究了颤振主动抑制系统的设计方法。1）提出了一种改进的非定常气动力拟合方法。

The results show that the efficiency of cascade would be more or less improved by the blade sweepforward, sweepback and bend, but the influence of them on the cascade flutter is various.

通过计算结果可以看出，前掠、后掠与弯曲或多或少可以提高叶栅的效率，但对颤振特性的影响却各有不同。

Furthermore, the fan blade was stacked renewedly. And then, the influence of blade sweepforward, sweepback and bend on the cascade flutter was discussion.

本文还在三维风扇叶片的基础上对叶片重新积叠，讨论了叶片前掠、后掠以及弯曲对颤振特性的影响。

The reporter downloaded on the net " super midge bully " software, buzz is heard only when moving, still feel some are swimmy with tinnitus. After 1 many hours, originally a few mosquito are in as before " flutter in sky ", a bit is done not have " desert " trend.

记者在网上下载了一个"超级蚊霸"的软件，运行时只听到嗡嗡声，还感觉到有些眩晕和耳鸣。1个多小时后，原本的几只蚊子依旧在"空中飞舞"，丝毫没有"逃跑"的趋势。

None of them noticed a large, tawny owl flutter past the window.

没有人注意到一只巨大的，棕色的猫头鹰飞过窗前。

And yellow leaves of autumn, which have no songs, flutter and fall therewith a sign.

秋天的黄叶，它们没有什么可唱，只叹息一声，飞落在那里。

Andyellow leaves of autumn, which have no songs, flutter and fall, therewith a sign.

秋天的黄叶，它们没有什么可唱，只叹息一声，飞落在那里。

Aquatic or marsh-growing fern allies; known to have existed since the Cenozoic; sometimes included in Lycopodiales.

生活于水中或湿地的蕨类；从新生代生存至今；有时归于石松目之中。

The engine was uprated from a 90hp Franklin to a 125hp Lycoming.

改良过的引擎是从90hp到125hp莱康明富兰克林。