Results In all 15 cases, 3 miliary-like diffuse, 8 weak echo nodular, 2 hybrid echo-mass, 2 calcified.
结果15例脾结核患者中有3例弥漫粟粒型，8例弱回声结节型，2例混合回声团块型，2例钙化型。
To solve the laser weak echo detection under the clutter background, A dynamic programming(DP) technique has been developed for the detection of weak targets.
为解决低信噪比下激光微弱回波的检测问题，提出了一种新的小目标检测算法。
In the paper the methods to process weak echo by using DSP technology based on low SNR of laser weak echo are presented. And the methods are simulated and calculated.
文章针对激光弱小回波信号的低信噪比，提出了运用数字信号处理技术对回波信号进行处理的方法，并进行了一系列仿真和计算。
The target echo of passive radar based on FM signal has the characteristics of low SCR and narrow band. Only the receiver with large dynamic range can receive the weak echo signal.
基于FM信号的无源雷达目标回波信号信杂比低，频带窄，只有开发大动态范围的接收机才有可能接收到微弱的目标散射信号。
This paper attempts to preprocess ultrasonic signal by wavelet filtering based on the mathematical model of the ultrasonic echo, extracts weak echoes from signal with high noise background.
在超声反射回波的数学模型基础上，利用小波滤波方法对超声信号进行预处理，提取强噪声背景中的弱回波信号。
The characteristics of the test signals were analyzed and weak defect echo signals were successfully extracted by cut-off frequency technique.
分析了检测信号的特征，并采用截止频率法成功地提取了微弱的缺陷回波信号。
In the PD radar detection, when the echo signal energy received is quite weak, the targets cannot be detected reliably with the traditional radar accumulation and detection method.
在PD雷达检测中，雷达接收到的回波信号的能量相当弱时，用传统的雷达积累与检测方法不能可靠地检测目标。
Moreover, the dense positive CG flashes can also be observed in the strong echo region, while sparse ones are in the weak and stable echo region or cloud anvil in the rear MCS.
密集的正地闪也与强回波区相对应，而稀疏的正地闪则多发生在系统后部的稳定性降水或云砧部位。
It presents a new method for automatically segmenting brain parenchyma and cerebrospinal fluid in routine single-echo MR images. This method is based on the weak membrane model.
提出一种自动分割单通道磁共振脑图像的新方法，这种方法建立在弱膜模型的基础上。
Besides, the target echo signal is often weak with strong noise, so data acquisition (DAQ) card should sustain high sampling frequency and resolution.
由于目标回波的低信杂比，需要采集卡具有较高的采样率和分辨率。
Besides, the target echo signal is often weak with strong noise, so data acquisition (DAQ) card should sustain high sampling frequency and resolution.
由于目标回波的低信杂比，需要采集卡具有较高的采样率和分辨率。
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