接收机只响应熟悉的脉冲序列。
这两类数字信号分别为通断信号和脉冲序列信号。
The two digital signal types are the on-off signal and the pulse train signal.
在允许脉冲序列输入之前，A的通信号必须消失。
The enable-A signal must be released before the pulse-train inputs are enabled.
结论：FAC对比效果随浓度和脉冲序列的改变而改变。
Conclusion: The contrast pattern of FAC in different concentrations will change in accordance with different MR fast sequences.
推导并分析了随机多元码PPM脉冲序列的平均模糊函数。
The average ambiguity function of the random multielement code PPM pulse sequence is developed and analyzed.
计算表明：Q开关放置在输出镜一侧会使脉冲序列更加稳定。
The theoretical results show placing the acoustic-optic Q-switch crystal near the output mirror can improve the stability of pulse train.
探讨舰船螺旋桨空泡噪声指数衰减型随机脉冲序列的理论模型。
The present paper deals with theoretical model of random sequence of exponential attenuate acoustic pulses caused by ship propeller cavitation noise.
谐波相位参考在频域上为梳状波而在时域上为很窄的脉冲序列。
Generally, the harmonic phase reference circuit is a comb generator in frequency domain and a pulse generator in time domain.
它采用二进制计数器以把被乘数由并行形式转换成脉冲序列形式。
It USES binary counters for the conversion of the multiplicand from parallel to pulse-train form.
数据采集系统是射频脉冲序列脉间频率稳定度测试系统中的一部分。
Data acquisition system discussed in this paper is a part of the measurement system of pulse-to-pulse frequency stability of RF pulse trains.
本文着重介绍了一种在噪声中积累和检测非均匀脉冲序列的数字实现方法。
A digital accumulating and detecting method used for an un-uniform pulse sequence in noise is described.
发射模块由频率合成电路、脉冲序列产生电路、混频电路和功放电路构成。
Transmitter is made up of frequency synthesizer, pulse sequence generator, mixer and amplifier.
采样控制系统中，所处理的信号是连续时间信号经采样后所得到的脉冲序列。
In the control system of sampling, signal to be dealt with is the pulse sequence after sampling from the continuous time signals.
提出了一种通过改变激光脉冲序列来提高三能级原子重力仪测量精度的方法。
We introduced a method that can improve the measurement precision of the three-level atom gravimeter by changing the sequence of the pulses.
方法：研制外部激发装置，设计成像脉冲序列，制作模拟人体软组织的体模。
Methods: An external force actuator was developed, the imaging pulse sequence of MRE was designed, and tissue simulating phantoms were constructed.
目的探讨超声造影剂及对比脉冲序列成像技术在肾占位性病变中的应用价值。
Objective To explore the value of ultrasound contrast agent and cadence contrast pulse sequencing technology (CPS) in renal occupied lesions.
分析了GRI脉冲序列与参考脉冲，以及调制码组与罗兰C脉冲组的时间关系。
The relationships between GRI pulse sequences and reference pulses, as well as between modulation code groups and Loran-C pulse groups are analyzed.
同时，本文首次提出了用后向差分理论，确定CC D脉冲序列阈值的新方法。
In the meanwhile, it presents a new method to calculate the threshold of CCD pulse sequence based on the theory of difference equation.
第三，详细讨论了磁共振成像谱仪中的脉冲序列发生器的设计思想和实现过程。
The structure of MRI spectrometer which is composed of DDS, digital receiver and pulse sequence generator etc, is described.
分析了GRI脉冲序列与参考脉冲，以及调制码组与罗兰C脉冲组的时间关系。
The time relationships between GRI pulse sequences and reference pulses, as well as between modulation codes and Loran-C pulse groups are analyzed.
配合谱仪进行了自旋回波脉冲序列的成象实验，获得了较高质量的质子密度图像。
The imaging experiment of spin-echo pulse-sequence was accomplished and images of good quality were obtained by using the homemade NMR micro-imaging system.
提出了一种基于双向触发二极管和单电容定时的，用于爆闪式信号灯的脉冲序列发生器。
A pulse-train generator using DIAC and single capacitance timing applied to the burst flashing signal lamp is proposed.
但是各种脉冲序列如何通过神经元之间的化学突触进行传递依然是一个悬而未决的问题。
But how various types of spike trains are transmitted across chemical synapses between neurons is still an open question.
微型计算机控制系统控制脉冲序列的发送，实现振动攻丝中转速、振幅和频率的无级调整。
Micro-computer control system controls the sending of pulse series and realises the change of speed, amplitude and frequency in vibratory tapping.
利用脉冲重复周期将交叠在一起的雷达脉冲序列分选开来是电子对抗领域的一个重要问题。
It is a important problem to deinterleave the radar signals with pulse repeat interval in electronic countermeasures.
本文提出一个Z回波核磁共振(nmr)脉冲序列，可以获得三能级体系的纯偶极或纯四极谱。
Z echo NMR pulse sequence is proposed for using in measurement of pure dipole or quadrupole spectrum.
通过建立系统的数学模型，求出了动态特性方程，计算出这三种输入整形器脉冲序列的幅值和时间。
To derive mathematical model, dynamic characteristic equations are obtained and the pulse amplitude and time of input shaper was calculated.
推导了随机脉位脉冲序列的自相关函数，给出了其功率谱，并与均匀脉冲串的功率谱进行了分析比较。
The autocorrelation function of the randomly staggered pulse sequence is derived, and its power spectrum is given. Comparison with constant pulse-repetition frequencies pulse sequence is also made.
实验结果表明：正常肺音音源为白噪声，异常肺音音源为周期脉冲序列，肺胸系统相当于声低通滤波器。
The results of experiment show that dreath sound sources are random white noise, Abnormal breath sounds sources are sequence of periodic impulses.
实验结果表明：正常肺音音源为白噪声，异常肺音音源为周期脉冲序列，肺胸系统相当于声低通滤波器。
The results of experiment show that dreath sound sources are random white noise, Abnormal breath sounds sources are sequence of periodic impulses.
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