The peak time detecting circuit which is composed of full-wave rectification circuit and differential circuit can detect the reach time of echo signal accurately.
采用时间增益补偿技术，补偿超声波在空气中的衰减，减少回波信号的起伏；由有源全波整流电路和微分电路等组成峰值时间检测电路，可正确检测回波的峰值到达时间。
He found that the length of time it takes a sound's echo to decay is determined by the absorption of the sound's original energy by surrounding material.
他发现，声音回声衰减的时间长短取决于周围物质对声音原始能量的吸收。
The further off this solid obstruction, the longer time will elapse for the return of the echo.
固体障碍物越远，回声返回所用时间就越长。
During the process, ping can monitor the time it takes to send and receive the response, which can be an effective method of measuring the response time of the echo process.
在这个过程中，ping可以监视发送数据包和接收响应花费的时间，这是测量echo过程的响应时间的有效方法。
The response time of this echo service is 9.99.
此echo服务的响应时间为9.99。
The response time of this echo service is 0.11.
此echo服务的响应时间为 0.11。
There are many students voted in resume, no echo, spent a lot of energy and time.
有很多大学生投了简历，得不到任何的回音，花费了不少的精力和时间等。
These signals provide an important reference of the gain of antenna, the time reference, the phase reference and the frequency of carrier wave for generating stimulant echo signal.
这些信号分别为模拟回波信号的生成提供了天线增益大小、时间基准、相位基准和载波频率大小等重要的参考信息。
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 return of the echo will elapse longer time.
回声返回所耗的时间越长了。
In high range resolution conditions, the migration of moving target causes the migration of echo envelop within multicycle integration time and brings the decline of detection performance.
在高分辨条件下，多周期积累时间内目标的运动会造成回波包络的跨单元走动，而距离走动带来了检测性能的下降。
The further off this solid obstruction, the longer time will elapse for the return of the echo.
固体障碍物越远。回声返回所用时间就越长。
The further off this solid obstruction the longer time will elapse for the return of the echo.
离开坚实的障碍物越远，回声返回所需的时间越长。
In the a high frame rate (HFR) ultrasonic imaging system, the weighting process by limited diffraction beams on echo signal takes the most of the calculation time for constructing an image.
在高帧率超声成像算法中，对回波信号进行有限衍射波束加权处理占用了成像中大部分计算时间。
Objective:To analyze the variety of parameter TE(time to echo), which should influence the segmentation of MR brain images.
目的：分析TE（回波延迟时间）参数变化对MR颅脑图像分割的影响。
The direction of longest echo time is the direction of minimum earth stress, and the direction of greatest earth stress is perpendicular to it.
回波时间最长的方向为最小地应力方向，最大地应力方向与之垂直。
PGA algorithm based on radar echo signal is one method of estimating and correcting phase error in time domain, and its algorithm is simple to use.
基于雷达回波信号的PGA算法是在时域估计和校正系统相位误差的一种方法，算法较简单。
This method utilizes the multiple receiver of monopulse tracking radar, and adopts the time-space processing method to process the echo.
该方法利用单脉冲雷达空间双路接收的特点，采用时-空二维联合处理的方法对回波信号进行处理。
Caught up in this crazy life, even the thought of roses is like an echo of a legend I hardly remember from once upon a time.
陷入这种疯狂的生活中，连“玫瑰”这个念头也只像我几乎想不起来的某个久远传说的一声回响。
In this paper, the traditional echo state network (ESN) through the structure and learning mechanism of the study, on the echo state network prediction method of chaotic time series.
本文主要通过对传统回声状态网络(esn)的结构和学习机理的研究，探讨了回声状态网络对混沌时间序列的预测方法。
Radar imaging geometry, which performs imaging in the direction of slanting range at the sample time of electromagnetic echo reflection, is quite different from optical imagery.
雷达是通过接收一定时间间隔内电磁回波成像，它与可见光成像不同。
By this mapping method, the real time coordinate conversion and processing of the echo signal become possible to perform for an ordinary PC.
采用该映射方法，在普通的PC机上即可完成实时坐标变换及对回波采样数据的进一步处理。
Yingying Pagoda of Pujiu Temple has special effect of echo. Tn this paple, we study the echo effect for the first time.
本文首次对普救寺莺莺塔的回声效应进行全面分析。
Adaptive algorithms are applied to real-time stereophonic acoustic echo cancellation to improve the communication quality of teleconference.
将自适应算法应用于实时立体声回波对消，以提高电话会议的通信质量。
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 estimation of time delay and scale of wideband echo is addressed.
研究了水下宽频带信号时延和尺度的估计问题。
The further off this solid obstruction , the longer time will elasp for the return of echo .
这种障碍物越厚实，回升持续的时间就越长。
Firstly, we introduce the radar equation of weather radar, the basic principles of detection weather targets, the time and frequency domain properties of weather radar echo and its simulation methods.
首先简要介绍了气象雷达的雷达方程、气象雷达探测气象目标的基本原理、气象目标回波的时域频域特性和气象回波信号的模拟方法。
Based on studying the generating and receiving circuit of ultrasonics, this dissertation analyzes that the key to improve measuring accuracy is how to seek the starting time of ultrasonic echo signal.
在研究了超声波信号的产生、接收电路的基础上，分析了提高测量精度的关键在于如何精确地寻找到超声波回波信号的起点时刻。
Based on studying the generating and receiving circuit of ultrasonics, this dissertation analyzes that the key to improve measuring accuracy is how to seek the starting time of ultrasonic echo signal.
在研究了超声波信号的产生、接收电路的基础上，分析了提高测量精度的关键在于如何精确地寻找到超声波回波信号的起点时刻。
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