Steering exposure time of a camera through control electron shutter with laser echo pulse is an effective method for inhibiting background noise.
用激光回波脉冲控制电子快门来操纵摄像机的曝光时间，是抑制背景噪声的一种有效方法。
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.
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。
Methods 59 patients with upper urinary tract obstruction were subjected to MRU performed in a heavily T2 weighted fast echo pulse sequence in the coronal plane.
方法59例上尿路梗阻性疾病患者接受检查，MRU为冠状位快速自旋回波T2加权像。
This paper studies the determination of datum station with GPS and the computation problems of the sound pulse signal received by the datum station of echo pulse receiver under water.
研究了用GPS测定基阵坐标，分析了水听器基阵所接收到的声脉冲信号的处理。
The scheme accomplishes range tracking by adopting three range gate tracking to make middle gate always centered at echo pulse center through feedback circuit and deviation calculation circuit.
该方案采用三波门跟踪，通过偏差计算电路和反馈控制电路使中间波门中心始终对准目标回波脉冲中心，完成距离跟踪。
The characteristics of this "echo" pulse tell us about the superposition we have made. Credit: ucl.
这种“回波”脉冲的特性可以告诉我们系统处于何种叠加态上。
Theprinciples of the laser active reconnaissance are explained via the comparison of the echo signal. target ranging isrealized by adopting the principle the pulse laser ranging.
通过对比研究激光对漫反射大目标、小目标和“猫眼”光学镜头的回波信号，给出激光主动侦察原理：对目标的距离测量应用脉冲激光测距原理实现；
We use … used it to track potentially dangerous asteroids, sending out a strong pulse of radio waves and listening for the echo.
我们通常…通常用它来跟踪有潜在危险的小天体，发出强大的无线电脉冲然后聆听回波。
A pulse sequence, namely rotary echo, with modest excitation bandwidth and mere adjustment of the experimental parameters is proposed in the present article.
本文提出的旋转回波脉冲序列具有激发带宽适中，实验参数调整简单的特点，可广泛应用于固体样品的核磁共振谱测量中。
Using the characteristics of pulse echo singal during the probe adjustment, a relation model between angle of incidence and time-domain eigenvalue of reflect wave signals was proposed.
分析了探头调整时脉冲回波信号的变化特点，在实验的基础上构建了声束入射角与表面波时域特征值间的关系模型。
The laser echo acquiring and processing technique is a key technique in laser pulse imaging.
激光回波信号采集和处理技术是激光脉冲成像的关键技术。
The Methodological investigation on the measurement of thickness of downhole casing with ultrasonic pulse echo technique is carried out both in theory and in experiments.
利用理论分析和实验模拟的方法研究了超声脉冲反射技术测量井下套管厚度的方法。
Artificial intelligence principles are used to determine and analyse the defects according to pulse echo characteristics.
采用人工智能原理，根据脉冲回波特征，对缺陷作出判断和分析。
In this paper, a equivalence sampling module for high-speed pulse echo acquisition is introduced.
文中介绍用于高速脉冲回波采集的等效采样模块。
Z echo NMR pulse sequence is proposed for using in measurement of pure dipole or quadrupole spectrum.
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。
The according pulse accumulation method is designed and realized, i. e. digitalizing the echo and synchronously accumulating them in RAM.
并设计了先对回波信号进行高速采样然后同步累加进行脉冲积累的方案。
Some methods of enhancing detection performance in dealing with the single pulse echo signal and the multi-period pulse bunch echo signal by accumulating are summarized.
阐释了单个脉冲回波信号和多周期脉冲串回波信号，利用积累来提高检测性能的多种方法。
An instrument for measuring ultrasonic attenuation by means of comparing the ultrasonic pulse echo with a calibrated exponential decay wave-form is described.
本装置用超声脉冲回波与定标指数波形比较的方法测量超声衰减。
The result is accord with geological sample and sediment chart, so this method can be applied on sediment classification of narrow-band pulse echo sound signal.
分析结果与地质采样结果及海图均吻合，说明本文提出的方法应用于窄带脉冲信号的海底底质分类是适用的。
In this paper, ideal rectangle and Gaussian shape pulse act as radar echo signal model. Through simulation research, application of NMTI method in wideband radar systems is discussed in detail.
该文分别以理想矩形和高斯钟形脉冲作为雷达回波信号模型，通过仿真研究，详细讨论了NMTI方法在宽带雷达中的应用。
The new methods can be used in both detection of FMCW echo and frequency estimation of correlative pulse train.
这两种方法既可用于多段线性调频连续波探测回波的积累检测，也可用于多个相参脉冲信号的积累与频率估计。
Ultrasonic method for oil film thickness measurement is discussed in this paper, including the pulse echo method and the continuous wave method.
本文对超声波油膜厚度测量法进行了探讨。它包括脉冲反射法和连续波法。
Using simulation echo wave and accurate time delay circuit to measure ranging ability, using CCD to grasp laser facular to measure divergence of laser pulse, the digitized methods are realized.
采用模拟回波和精密延时电路检测照射能力、用CCD采集激光光斑测试激光束散角，实现了整机性能的数字化检测。
Explain the characteristics of piezoelectric crystals and the factors relating to the resonant frequencies of a piezoelectric crystal, and the procedure of the pulse-echo method.
说明压电晶体的特性和与压电晶体的共振频率有关的因数，以及脉波-波法的过程。
Soil dynamic properties index about the test site were acquired, pulse echo dynamic test figures of model piles enclosed with soil and without soil were also acquired and analysed systematically.
获得试验场地土动力特性指标和桩周有土、无土两种情况下模型桩的反射波特性曲线，并进行了系统分析。
The popular non destructive test methods for the foam-cored sandwich structure are reviewed; including air coupled ultrasonic method, pulse-echo ultrasonic method and shearogragh method.
回顾了泡沫夹层结构常用的无损检测方法：空气耦合超声方法、脉冲回波超声方法以及激光错位散斑干涉方法。
The transmission rule of the lamb wave in the structure of the flexible joint is discussed, and the ultrasonic pulse echo is analyzed in the time-field and frequency-field.
本文首先分析了板波诱发纵波在柔性接头构件中的传播规律，对原始回波信号进行时域和频域分析。
The frequency response of the transducers is measured experimentally using laser ultrasound and a pulse echo reflecting method. The spectral analysis results are compared and analyzed.
由激光超声方法和自发自收脉冲反射法实验测定了所制作的换能器的频率响应，并比较了频谱分析结果。
Phase coded signal and the pulse radar echo have been simulated.
文中以脉冲雷达回波信号和相位码信号为例。
The used ultrasonic testing method is only limited to A-scope pulse-echo method.
所用的超声探伤方法仅限于八型显示脉冲反射法。
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