The material and the structure of target is the reason for producting echo characteristic.
目标的材料和结构是产生回波特征的原因。
Objective To evaluate the histopathological basis which determines the sonograms echo characteristic of liver solid masses.
目的了解决定肝实性占位病变超声回声特性的病理组织学基础。
The method is based on Pulse echo characteristic in oil film. Separatingone pulse echo from reflected pulses, the oil film change is demonstrated.
其基本原理是超声波在油膜层中的反射波中分离出一条与油膜厚度的变化同步变化的反射脉冲井进行处理以显示油膜厚度。
According to laser radar echo characteristic, the difference filter and the match filter were adopted. As a result, the SNR is advanced about 1.5 times.
根据三脉冲激光雷达回波信号的特点，对信号进行差分滤波和匹配滤波处理，信噪比提高约1.5倍；
Differences of echo characteristic between impulse radar and continuous wave radar are analyzed, and the potential of UWB impulse for Super-Low-Altitude target-detection is remarked.
分析了超宽带冲激脉冲雷达与连续波雷达的不同的回波特性，指出冲激脉冲雷达对超低空目标探测的潜在优势。
This characteristic finds an echo in business conduct.
这一特征也反映在商业行为中。
Besides amplitude, phase and Doppler frequency, polarimetric information is the fourth characteristic in the radar echo.
雷达回波信号中，除幅度、相位和多普勒频移外，还存在第四特征——极化信息。
This article introduces the reason, course and characteristic of the new chemicals policy of European Union (REACH) and the echo on it from various fields; and sets forth the opinions and advices.
介绍了欧盟化学品新政策(REACH)的来由、历程、特征及来自不同方面的反响，并提出了意见及建议。
Then discussing the phase information and Doppler characteristic of target echo wave in the pulse Doppler phase radar.
并且讨论了在脉冲多普勒相参体制雷达下目标回波的相位信息以及目标信号的多普勒谱特性。
In the paper the amplitude characteristic of echo signal and its conjugate signal are analysis, based on that a detection method based on conjugated FRFT in sea clutter is proposed.
文中分析了回波信号以及其共轭信号的FRFT幅值特性，并利用此特性提出了一种基于共轭FRFT模函数对消的海面运动目标检测方法。
According to characteristic of direct wave in PGPR echo, 2d filtering, matrix filtering and horizontal high pass filtering are tried to remove direct wave in PGPR echo.
针对PGPR回波中直达波的特性，尝试用二维滤波、模板滤波和水平高通滤波去除PGPR直达波并分析各个方法的利弊。
Laser altimeter not only can precisely measure the target distance, but also extract characteristic information, such as inclination, roughness etc. from its echo signals. So they are applied widely.
激光测高仪不仅可以精确测量目标的距离，还能够从回波信号中提取倾斜度、粗糙度等特征信息，应用十分广泛。
Laser altimeter not only can precisely measure the target distance, but also extract characteristic information, such as inclination, roughness etc. from its echo signals. So they are applied widely.
激光测高仪不仅可以精确测量目标的距离，还能够从回波信号中提取倾斜度、粗糙度等特征信息，应用十分广泛。
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