信号

For example:– at 30 m distance an audible signal is given;– at 20 m distance the crane speed is decreased;– at 5 m distance the final stop signal is given.

–在30米处发出可听信号；–在20米处起重机减速；–在最后5米处发出停车信号。

This ultrasonic garbage is obviously not audible, but it can swamp the audble signal and cause the input circuitry to go into non-linear modes of operation, causing the audible signal to be somewhat distorted.

我们显然听不到这些超声"垃圾"，但它可能湮没可听范围到的信号并且让输入电流工作在非线性的模式下，进而使可听范围信号遭到某种程度的扭曲。

Forexample:– at 30 m distance an audible signal is given;– at 20 m distance the crane speed is decreased;– at 5 m distance the final stop signal is given.

–在30米处发出可听信号；–在20米处起重机减速；–在最后5米处发出停车信号。

This experiment is in frequency adjustment X-mitter about that miniwatt frequency adjustment X-mitter operating principle, analyses the debugging making method and their installation, the microphone changes implication into an audible signal, wave an audible signal being modulated as a result of enlarging the day afer tomorrow being in progress to the carrier wave , producing frequency adjustment, by the fact that air wire launching the frequency adjustment electromagnetic wave to the outside , the radio set just can with frequency adjustment meet hear clear implication.

本毕业设计是关于小功率调频发射机工作原理、分析制作方法及其安装调试，在调频发射机中，话筒将话音转化为音频信号，音频信号经放大后对载波进行调制，产生调频波，通过天线向外发射调频电磁波，用调频收音机便可以接听到清楚的话音。

CPLD is the core of the sampling audio board, which converts the analog audio signal in every channel to digital audio signal, then stores the audio data in the data buffer.

音频采集板以CPLD为核心，主要将各路模拟音频信号转换成数字音频信号，然后存入数据缓冲区。

The device further comprises a modulation unit (3) coupled to the heating control unit (2) for producing the control signal in response to an audio signal.

该装置还包括耦合到热控制单元(2)用于响应音频信号产生控制信号的调制单元(3)。

Heart sound is one of the most important physiological signal in human body, the history of cardiac auscultation is more than 180 years.

心音是人体最重要的生理信号之一，心音听诊的历史已有180多年。但是由于缺乏能够客观量化的指标，使得心音信号检测在诊断和评估心功能方面仍然只是一种辅助手段。

The basic theory of cyclic statistics and the demodulation principle of cyclic autocorrelation function are introduced.

论文提出了利用循环统计量诊断往复式压缩机的方法，介绍了循环统计理论和循环自相关函数解调原理，利用仿真技术检验了循环统计方法的有效性，并分别对仿真信号和实测信号建立了循环谱密度三维图。

The process of digital signal include routine filter circuit and Automatic Gain Control Circuit.

系统中对数据信号的处理，除了常规的滤波电路外，还采用了自动增益放大电路，来提高信号的可靠性。

Getting rid of high DC background and automatic gain control are very essential for extracting target signal out effectively.

通过分析红外CCD信号处理电路的设计要求，介绍了应用于该信号处理的几种常用电路的设计方法。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。