Period characteristics of radiated noise at high frequency is investigated by a method based on short time Fast Fourier Transformation, and propeller speed is estimated.

  • 用短时傅立叶分析的方法研究了辐射噪声在高频段时频变化的周期性,估计了目标的螺旋桨转速。
  • 来源:互联网摘选2026-05-07 14:01:37

  • 重点词汇
  • propellern.螺旋桨,推进器;=propellor;
  • characteristicsn.特性,特征,特色,[数](对数的)首数( characteristic的名词复数 );独特性;性质;
  • periodn.一段时间,时期;周期;<数>(周期函数的)周期;(练习、训练、学习的)时间,时段;(人生或国家历史的)阶段,时代;<美口>结束,终止;课时,学时,节;(妇女的)经期,月经;<美> 句号,句点;<医>病期,病程;<天>自转(或公转)周期;(冰球等比赛的)一局;<音> 乐段,乐节;完整句(尤指含有若干从句、结 构工整的复合句);纪(地质年代,代下分纪)
  • isvt.& vi. 是(be的三单形式);
  • investigatedv.调查( investigate的过去式和过去分词 );审查;侦查;研究;
  • short time缩短工作时间;短时间;
  • andconj. 和;与;而且;于是;然后
  • fastadj.快的,迅速的;头脑灵活的;系牢的;不掉色的;
  • based on基于;以……为基础
  • 相关例句
1、

Study the suppression algorithm of chirp interference based on Short Time Fourier Transform and Fractional Fourier Transform, using time-frequency analysis theory.

利用时频分析理论,讨论了基于短时傅里叶变换和分数阶傅里叶变换的扫频干扰的抑制算法。

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2、

Effects of Combined Holding Technology with Ultrasonic Wave on Short Time Storage for Cut Wintersweet Branch Twigs

超声波及其复合保鲜技术对素心蜡梅切枝短期贮运的影响

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3、

In the design of filter, classical methods are based on Short Time Spectral Analysis ( STSA).

在滤波器的设计方面,传统的基于短时谱分析的方法具有易实现,实用性强的特点。

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4、

Flow fields disturbance research of regulating valve based on short time fourier transform spectrogram

基于短时傅里叶谱的调节阀流场扰动研究

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5、

Realtime Voice Activity Detection Based on Short Time Energy Plus Rate of Passing Zero

基于短时能量加过零率的实时语音端点检测方法

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6、

Study on Short time Nitriding Process

短时渗氮工艺的研究

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7、

Voltage Sag Disturbance Detection Based on Short Time Fourier Transform

基于短时傅里叶变换的电压暂降扰动检测

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8、

Analytical expressions are obtained on short time and long time approximations.

在短时和长时近似下,得到了解析表达式。

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9、

Workers have been put on short time.

工人们不得不面临开工不足的问题。

provided by jukuu

10、

He's been put on short time because business is so quiet.

因为生意清淡,他工时不足。

provided by jukuu

11、

Algorithm Study on Short Time Series Mining

短时间序列挖掘方法研究

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12、

The report of experiment on short time culture for high quality pearl

优质珍珠快速育成技术试验报告

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13、

Workers across the country have been put on short time because of the slump in demand

因需求量大幅下降,全国的工人都开工不足。

柯林斯高阶英汉双解学习词典

14、

Yet it is clear that the US will leave no policy stone unturned in the attempt to put the economic show back on the road, so there should be no Japanese-style lost decade in North America.

不过很显然,美国将动用一切政策手段,使经济回到增长轨道上,因此,日本式失去的十年应不会在北美上演。

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15、

With public excitement about White House beer fermenting such a buzz, we decided we better hop right to it, says the White House's assistant chef Sam Kass, who brews the ale.

酿造这一麦芽啤酒的白宫助理厨师山姆•卡斯说:因为公众对白宫啤酒的热情引发了不小的骚动,所以我们决定最好还是赶紧把秘方告诉大家。

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16、

While they might shake and break the spine of smaller prey, they hop to it with people-sized victims. When they have a victim prone, they start eating.

当它们跳到它与人类差不多大小的受害者身上,可能会摇晃并折断小猎物的脊椎,如果其中有一个弱小的受害者,它们就会直接开吃。

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17、

And don't expect the service to be a hairy situation: These macaques understand requests for another round of beer, and hop to it promptly.

不用担心它们一身绒毛,奉上啤酒后它们转身就会离开。

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18、

Yes, well, hop to it, then, both of you.

好的,你们两个快跳去吧。

provided by jukuu

19、

There's a lot to DO, you'd better hop to it.

有很多事情做,你最好快一点。

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20、

Old firms get into a rut sometimes.

老字号公司有时要按老套套办事。

provided by jukuu

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