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- EMD is used here as a signal separation tool to separate the tow ship noise from the received signal. 本文尝试利用经验模式分解方法分离出水听器接收信号中的拖船干扰噪声,从而达到消除干扰的目的。
- Multipath of the towing ship noise limits the performance of adaptive interference can-celing (AIC) which utilizes the fixed beam as a reference input. 拖曳线列阵声纳中,拖船噪声常常是影响声纳性能的重要因素之一。
- This article qualitative introduced the use tree planting method, during beautified environment, reduces the ships noise to the environment pollution, expanded the tree planting potency. 摘要针对船舶噪音与居住环境的矛盾逐渐突出,提出了利用绿化手段,降低船舶噪音对环境的污染,扩展了绿化的效能。
- In addition, the envelope of ship noise waveform can be remodulated utilizing Hubert transform, and the spectrum components with line rotation frequency of propeller shaft are extracted effectively by bispectrum analysis. 另外,对于通过Hilbert变换解出的舰船辐射噪声包络进行双谱分析,有效地提取出了舰船轴频线谱。
- Tow ship noise is a nonstationary process with several characteristic properties, such as multi-path and angle dispersion, which greatly add the difficulty to cancel or suppress the noise. 拖曳式线列阵声纳的拖船噪声具有多途角扩展等特点,并且是一个非平稳过程,使得对该噪声的消除或抑制是一大难点。
- A New Method for Feature Extraction in Ship Noise 基于多重分形的舰船噪声特征提取
- Novel method for tow ship noise cancelling 拖船干扰抵消的一种新方法研究
- The lifeboat went out to a ship in distress. 救生船去救一艘遇险的船只。
- Passenger ships are a costly way to travel. 坐游轮是昂贵的旅行方法。
- A study on ships' noise and vibration comprehensive control 船舶振声综合治理研究
- The ship steamed into the harbor. 船驶入了港湾。
- Enemy ships tried to run the blockade. 敌军船只企图突破封锁线。
- These cruise ships can turn round in two days. 这些游船可用两天的时间装卸完毕。
- The ship was loaded with cargo fore and aft. 这条船从船头到船尾装满了货物。
- The supply ships travelled in convoy. 补给船结队航行。
- The enemy's ships blockaded the harbor. 敌人的军舰封锁了港口。
- Ships must follow the channel into the port. 船只必须沿航道进入港口。
- The ship beat back against a monsoon. 船逆着季风艰难地行驶。
- The ship kept the buoy on her off side. 这条船在浮标的左边。
- He plotted out the course the ship should follow. 他在海图上标绘出了这艘船该走的航线。