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- helicopter noise signals 噪声信号
- Chaos characteristics of the aerodynamic noise are discussed and the aeroacoustic noise signals on helicopter scissors tail rotor is analyzed by the chaos theory. 研究剪刀式尾桨气动噪声的混沌特性,并应用混沌理论进行了直升机尾桨气动噪声信号分析。
- Therefore,bispectrum is used to extract the non-gaussian ingredients from the noise signals of ships. 由此可利用信号双谱,提取舰船辐射噪声信号的非高斯成份。
- Twisted wire pairs in a cable are also more resistant to crosstalk or noise signals from adjacent wire pairs. 缆线中的双铰线对于来自邻近电线的串音或杂讯有较大的阻抗。
- Differential signals can help nullify the effects of ground shifts and induced noise signals that can appear as common mode voltages on a network. 差分信号有助于消除在网络中作为共模电压出现的接地偏移和感应噪声信号的影响。
- There is a great deal of dynamic and stochastic noise in the burning process of the furnace flame. These noise signals must be eliminated. 全炉膛火焰的燃烧过程伴随着大量动态的随机噪声,这些噪声信号必须消除。
- This code is used to sum signals (eg. sinewave and noise signals) and produce an output signal. (译):此代码是用来总结信号(如正弦波和噪声信号) ,并产生一个输出信号。
- At last, application of multiclass classifiers based on SVM in classification of noise signal is studied. 最后,将基于支持向量机的多类分类方法应用于舰船噪声信号分类。
- Then we can filtrate the noise signals by using MATLAB wavelet toolbox and identify the destruction degree.We identify the destruction degree by IFFT interpolation algorithms. 本文介绍采用超声波技术研制抽油管螺纹区裂纹检测的传感器,检测出螺纹区内的缺陷信号,利用MATLAB环境下的小波处理技术滤掉缺陷的干扰信号,识别缺陷的损伤程度。
- The white Gaussian noise was successfully separated from noise signal in low-field pulse NMR system and its parameters were estimated by using this method. 采用该方法从实际低场脉冲核磁共振系统噪声信号中分离出高斯白噪声并对其进行了参数估计。
- Using the acoustic noise signal generated by driving motor vehicles to vehicle classification is a new and promising method. 利用车辆行驶过程中所产生的声频噪声信号进行车型分类是一种新方法,有较大应用前景。
- Measuring and analyzing technology based on variable-time-interval Fourier transform was dealt with for vehicle accelerating noise signal. 摘要提出了基于变时基短时傅里叶变换来分析和处理时变信号的技术。
- It is difficult to reduce the noise signal in the cab signal by normal filter because the frequency of it is similar to themodulate signal. 由于铁道机车信号中噪音信号频率与调频信号频率较为接近,使用普通滤波器很难在滤除噪音时尽可能少地影响有用信号。
- Two sensors on two sides of leaking point can magnify the received noise signal and send it wirlessly through transmitter to correlator's mainframe. 置于漏点两侧的两个传感器可放大接收到的漏水噪声信号,并通过发射机以无线电方式传送给相关仪主机。
- The shipwrecked sailors were rescued by helicopter. 遭遇海难的水手已经被直升机救起。
- Because engine noise takes on complicated frequency characteristics, if original noise signal is not collected, the noise control effect will not be evident. 由于发动机噪声的频率成分比较复杂,如果采用主动降噪技术不能适时采集到源噪声信号,就达不到理想的降噪效果。
- The helicopter had off when we got here. 当我们到达时,直升机已经起飞了。
- And the results from two different apparatuses are basically in agre-ement, the noise signal generator has its superiority in the measurement of the stability of sensitivity. 并且由两种不同的仪器所得到的结果基本上是一致的。噪声信号发生器在灵敏度稳定性的测量中比标准信号发生器操作简单、方便,数据一致性好。
- We were whirled away in a helicopter. 直升机迅速把我们运走。
- The helicopter hovered over the house. 直升飞机停留在那房子上空。