approaching signal meaning in Chinese
进场信号机（航空）
预告信号
远方信号机
Examples
- Second , introduce the dyadic wavelet analysis , and use it realized the signal monitor and analysis to the turbine compressor , obtained the detail signal and approach signal at different frequency parts of the compressor s original signal . one type of electromotor that made in china is choose , and it s noise is tested . the noise signal is analyzed by wavelet analysis and spectrum analysis . several high spectral peaks that make people hearing disameniry are found . by contrast with theory calculating results and farther analysis . the cause that producing these spectral peaks is located
其次，介绍了二进小波分析，并应用二进小波分析实现了对透平压缩机信号的监测分析，得到了压缩机原始信号在不同频率段分解的细节信号和逼近信号。用小波分析和谱分析相结合的方法对某国产电机的噪声进行了分析，找出了人的听阈不阅的几个高谱峰位置，进行了空气动力噪声计算，通过与理论计算结果进行对比分析，进一步找出了产生该频闽谱峰的几个原因，第三，介绍了谐波小波和分形的基本原理。 - There are a lot of ways to realize the alarm when the train approach , and sound alarm is used in this device , when the sensor receives the train - approaching signal , the controller will analyze and handle the signal of coming train by the direction of coming train , and make an alarm signal of up or down traveling train approaching
列车接近报警的实现有很多方法，本仪器采用声报警器的工作方式，传感器接受到列车接近信号，控制器对来车信号进行分析处理,并按来车方向，通过声报警装置发出上行或下行列车接近报警信号。