由于各种噪声的影响，以及声发射信号传播过程的复杂性，又给声源的识别带来一定的困难。
Because of the noise and complex of AE signal transmission characteristic, the recognition of AE source is very difficult.
这是因为在空中传播的高频信号中，两个模拟发射频道的之间要有一个空置的频道这样才不会干扰相邻的频道。
That was because, in over-the-air VHF broadcasting, the channel between two analogue stations had to be left unused so that it would not interfere with adjacent ones.
使声波信号沿着发射器和接收器之间的套管井壁传播时的幅度衰减确定套管外水泥胶结质量的声波测井方法。
A log that USES the variations in amplitude of an acoustic signal traveling down the casing wall between a transmitter and receiver to determine the quality of cement bond on the exterior casing wall.
每个蜂巢装备有小功率的无线电发射器和接收器，使信号能在手机用户之间传播。
Each cell is equipped with a low-powered radio transmitter and receiver that permit propagation of signals among cell-phone users.
由于泄漏声发射信号的多模态特性和在管道内传播过程中的频散特性，使得通过相关分析进行管道泄漏定位的效果很差。
Due to the multi modes and dispersion nature of acoustic emission (AE) propagating in pipeline, traditional cross correlation technique do not perform well for acoustic leak location.
光耦合器424沿着与光源402产生的光数据信号同向传播的方向发射拉曼光泵浦信号。
The optical coupler 424 launches the Raman optical pumping signal in a direction that co-propagates with the optical data signals that are generated by the optical source 402.
采用B - P型反向传播神经网络构成的智能化模式分类器，对此五类声发射信号进行识别，获得了满意的效果。
An intelligent pattern classifier with B-P neural network is used in recognition of those five kinds of AE signals successfully.
采用B - P型反向传播神经网络构成的智能化模式分类器，对此五类声发射信号进行识别，获得了满意的效果。
An intelligent pattern classifier with B-P neural network is used in recognition of those five kinds of AE signals successfully.
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