查询词典 signal to noise ratio

Computer calculations of the dependance of correlation output on the amplitudes of reference signal、write signal、read signal and duration of write signal were given.

计算了相关输出与参考信号、写信号及读信号幅度的关系，以及相关输出与写信号持续时间的关系。

Signal forming and different demodulation of GMSK baseband signal are mainly discussed in the dissertation. Gauss Filter, phase integral, SIN table, matched filter, calculate angle, bit-synchronization、output filter、A/D、D/A and etc of GMSK baseband signal are carefully studied through software emulation in SYSTEMVIEW environment. The modulation and demodulation of GMSK baseband signal are carried out by the way of using TMS320VC549 of TI to integrate software and hardware.

本文重点讨论了GMSK基带信号的形成以及GMSK基带信号的差分解调，系统在SYSTEMVIEW的环境下进行了软件仿真，通过对系统的仿真工作，仔细的研究了GMSK基带信号的高斯预滤波器、相位积分、SIN查表、匹配滤波器、相角计算、位同步、帧同步、输出滤波、A/D和D/A等。

The reference clock signal RCLK leads the feedback clock signal FCLK, generating a series of pulses in the DN signal and longer pulses in the UP signal.

在图3中，基准时钟信号RCLK引导反馈时钟信号FCLK，在DN信号中生成系列脉冲，在UP信号中生成较长的脉冲。

Will use the Hall Voltage Sensor integrated circuit to arrive the signal to transform as magnetism signal, again magnetism signal to voltage signal transformation.

采用霍尔集成电路将到位信号转化为磁信号，再将磁信号向电压信号转化。

In this dissertation, digital lock-in detection techniques under integer period sampling and non-integer period sampling are separately investigated (1) Under integer period sampling, digital signal sequence is acquired through sampling the measured signal, but digital reference sequence is acquired through mathematical operation, then digital lock-in detection can be realized by calculating crosscorrelation function of digital signal sequence and digital reference sequence Harmonic measure is also analyzed, and a method of measuring harmonic of a periodic signal under aliasing is put forward.

本文对使用采样ADC把模拟信号转换为数字信号并通过计算数字信号的相关函数来实现锁定检测的技术进行了研究，在此基础上设计了一个多功能的数字LIA并在一些科学实验中进行了应用。本文对整周期采样和非整周期采样时的数字锁定检测技术分别进行了研究。(1)在整周期采样时，对被测信号进行采样得到信号序列，而参考序列由数学运算得到，通过计算信号序列和参考序列的互相关函数就可实现锁定检测。

The single a machine that should design to adopt serieses MCS-51s primarily conduct and actions main a measurement for, passing spreading feeling machine to the current of air measuring, its change is homologous pulse signal, this pulse signal through A/ D conversion with D/ A conversion after produce the certain electric voltage signal, will show the inceptive pulse signal a discharge for representing to come out at the same time.

该设计主要采用了MCS-51系列的单片机作为主要的芯片，通过传感器对燃气流量的测定，将其转变为相应的脉冲信号，这个脉冲信号经过A/D转换和D/A转化之后产生一定的电压信号，同时会将起初的脉冲信号所代表的流量显示出来。

Traffic signal control system Settings in each intersection signal lights color control parameters, to signal under the control of the intersection in all directions of traffic flow in the intersection of the stalled minimum delay time, and in a number of intersection signal chain control , To seek optimal within the region, to further improve vehicle operating conditions, making pollutant emissions reduced.

交通信号控制系统通过在每个交叉口设置色灯信号控制参数，使其信号控制下的本交叉口所有方向的交通流在交叉口的停顿延误时间最小，以及在多个交叉口信号联锁控制时，寻求区域内最优，进而达到改善机动车运行工况，使得污染物排放量降低。

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公司主要生产的空气呼吸器，正压式空气呼吸器，紧急逃生呼吸器装置|EEBD，船用油水分离器|船用油水分离器装置|船用舱底油污水分离器装置，船用消防员装备|消防员装备，正压式空气呼吸器备用气瓶，船用灭火器，PQ8.C型手提式空气泡沫枪装置，国际通岸接头，消防隔热服|隔热服，消防防化服，多用水枪，耐火绳|耐火救生绳，防爆灯，静水压力释放器，保温用具，救生衣，保温救生服，救生圈，救生衣灯，救生圈灯，救生筏灯，救生筏架，船用油水分离器装置，船用红色火焰信号，船用橙色烟雾信号，救生圈自亮浮灯烟雾信号，救生圈用橙色烟雾信号，船用抛绳设备，船用救生抛绳器，船用油水分离器装置等产品。

Optical signal that the receiver receives , shaking the light wave produced with the receiver , on terms that meet the phase place and match and the amplitude is matched, mix it frequently , output the square of intermediate frequency signal electric current in direct radio of sum of the intensity of optical signal produced with optical signal , and receiver .

接收机接收到的光信号、与接收机内部振荡所产生的光波，在满足相位匹配和振幅匹配的条件下，进行混频，输出与光信号、和接收机产生之光信号强度之和的平方成正比的中频信号电流。

The microseism signal automatic recognition system can pick up and analysis P wave 、S wave and the interfering signal in the microseism signal caused by the mining tremor, determine the time of signal arrival and amplitude, energy etc.

矿山微震信号自动识别系统可以对由矿震所引发的微震信号进行拾取并分析P波、S波及干扰信号，确定信号到时及振幅、能量等微震属性，为预测和防治矿震灾害提供了必要参数。

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。