您要查找的是不是：
- On striking the earth, the sky wave bounces back again. 一打到地面，天波又弹跳回来。
- When the square wave signal pass the LPF,we can get the sine signal. 经过分析可知,检测过程中的低通滤波器对检测的精度和速度有重要影响。
- A newly developed auto-monitor system for the long wave signal(BPL) is introduced. 介绍了新研制的长波信号 (呼号BPL)自动监视系统。
- Inevitably, some technically difficult problem must be solved, including the variety of speed about tropospheric propagation, the sky wave disturbance and the near-far problem. 但是,不可避免的遇到几个技术难题,包括无线电传播速度变化的影响,天波干扰问题,以及远近效应问题。
- The dynamic error is inevitable because the bandwidth of measurement system cannot cover completely the efficient bandwidth of the blast wave signal. 由于测试系统的带宽不能完全覆盖冲击波信号的有效带宽,存在不可忽视的动态误差。
- USB mouth, digital double channel and electric potential collector, brain wave signal is put into the computer after digital processing. USB接口全数字化双通道脑电采集器，将脑电信号数字化处理后输入计算机；
- Curve the films into rectangle waveguide with BCl3 ions. Detect the gain 10.0dB at the 10uW square wave signal and pump power 160mW. Get 4.2dB gain per centimeter. 用BCl_3干法刻蚀将镱铒共掺Al_2O_3薄膜刻蚀成光波导，当信号光被调制为1Hz的方波时，在160mW功率泵浦下，光波导放大器的总增益为10.;0dB，单位长度增益为4
- Synchronous monitoring system can record and recurring the monitoring image and brain wave signal synchronously, and monitor the cooperation of the testee. 同步监控系统，将监控图像和脑电信号同步记录和回放。能够监控被测试对象的配合程度；
- ZHANG Yun-cai.Dual flap making wave system and parameterless analysis of wave signal spectrum [J].Journal of Shanghai JiaotongUniversity, 1996,30(10):141- 146. [4]张云彩.;双摇板造波机系统及波浪信号谱无参分析[J]
- A cloud is a mass of vapor in the sky. 云是天空中的水汽团。
- The clear water mirrored the blue sky. 清澈的水中映出蔚蓝的天空。
- sky wave propagation for low frequency 低频天波传播
- a sky wave that is reflected by the ionosphere 通过电离层反射回来的天波
- AGC(automatic gain control) is used, namely, peak voltage of back wave signal after sampled is input to microprocessor, then A/D converter, D/A converter, gain control adjusting circuit to realize back wave signal AGC. 采用自动增益控制,即回波信号的峰值电压经过采样后进入单片机进行 A/D 转换,再经过 D/A 转换和增益控制电路,形成回波增益的自动控制;
- The huge trees were profiled against the night sky. 在夜空的映衬下显出大树的轮廓。
- This paper specifies the composition and principle of the circuit of the rectangle wave signal generator based on 89C51 single chip microprocessor control and BCD rate multiplier synthesis. 介绍一种由89C51单片机控制、BCD系数乘法器4527数字合成的方波信号发生器及其电路组成和工作原理.
- high-frequency sky wave field strength 高频天波场强
- In this paper, we present the basic principle of dual flap wave-maker and the producing of driving signal firstly, and then the influence of two distinct FFT methods with the same wave signal to the primary parameters of wave spectrum. 摘要叙述了采用双摇板造波系统的基本思想及双摇板造波信号的生成，并分析了同一波浪信号用不同谱分析法对所得主要谱参数的影响。
- The sky is bespangled with stars. 天空中点缀着亮晶晶的星星。
- Work out high-efficient procedure and realize fast regulation of phase and amplitude of sinusoidal wave signal by utilizing high operation characteristic of 80C196MC and advantage of the wave form generator(WFG) in this paper. 本文还利用80C196MC运算速度快的特点及波形发生器(WFG)的优点，编制了高效的程序，实现快速地对正弦波信号的相位和电压幅值进行调节。
