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Conventional methods based on the intensity of target echo signal will result in high false alarming rate if mine-like object such as rock laying on the seafloor. 传统的基于目标回波信号强度的检测方法在海底存在岩石等类似于水雷等人造目标的情况下，常会导致较高的虚警率。
The precipitation is related with the echo intensity, the VIL data and the RZ data. 回波强度、VIL和RZ值与降水有很好的相关性；
Methods The inner diameter ,thickness , echo intensity and aneurysm aneurysm of aeteria coronaria were detected in patients with Kawasaki disease. 方法利用彩色多普勒超声诊断技术检测川崎病患儿冠状动脉内径,观察冠状动脉壁厚度、回声强度及有无动脉瘤形成。
The size, echo intensity, intratumoral vascularity of tumors and the perfusion of tumors parenchyma during the vascular phase were monitored. 分别用灰阶超声、彩色多普勒超声和超声造影检查，观察肿瘤的大小、回声强度、肿瘤内的血管和肿瘤实质的血流灌注。
The results show that 1 the echo intensity recorded by ADCP through calibration could reduce the decay of echo with the distance. 研究结果发现：（1）ADCP所记录的回波强度资料，可以透过校正方法将声波随距离衰减影响减少，并应用于水团运动之分析讨论。
The director could be slewed quite quickly until the range operator picked up the target echo. 指挥仪快速回转直到测距手捕获目标的反射回波。
Target echo signals are the main information source in underwater acoustic detection system. 目标回波信号是水声探测系统主要的信息来源。
Methods The size,echo intensity on 2-DUS and blood flow on CDFI in sternocleidomastoid mascle(SCM) masses in 46 infants were examined,measured and analysed. 方法总结分析46例胸锁乳突肌(SCM)肿块的超声检查资料,分析其大小、内部回声及多普勒血流信号。
The parallel arithmetic of distribute space borne SAR ground target echo data simulating procedure was examined. 摘要对分布式星载SAR系统地面回波仿真程序并行化算法进行了研究。
Conclusions Ultrasonography is an effective method for diagnosis and differential diagnosis of the disease.The size and echo intensity of the mass are related to cl... 结论二维及彩色多普勒超声检查对本病的诊断及鉴别诊断是一种有效的方法,肿块的大小及内部回声强度与临床转归有关。
Objective:To investigate the relationship between changes of echo intensity and myocardial contractility in acute ischemia and reperfusion of the heart. 目的：观察心肌组织在急性缺血与再灌注过程中回声强度的变化及其与心肌收缩力的关系。
The cluttering area wherein the fuze antenna illuminates is distributed into small clutter cells and the clutter modeling is built up as the method of fuze target echo modeling. 对天线照射区域内的杂波进行了分割，采用近似目标回波的处理方法对杂波进行了建模，并将该方法应用到引信目标模拟器中。
When the target echo on the radar scope is bisected by the center bearing line, the director is trained on the target, and the correct value of director train is determined. 当指挥仪旋转的时候，其上的雷达天线也跟着转动，当显示器上的目标回波被中央方位线（center bearing line）分为两半时，雷达天线就对准了目标，指挥仪的旋转角也就确定了。
Based on the characteristic of target echo in ISAR, the original method of Doppler center estimation is ameliorated to increase the motion parameter estimation precision. 针对ISAR中目标回波的特点，对原始的多普勒中心估计方法进行了改进，提高了运动参数估计精度。
The values of echo intensity and IBS were progressively decreased from the near field to the far field,and the IBS in chemotherapy caused adiposis hepatica were significantly higher than the normal subjects. 其IBS值近、中、远声场依次递减 ,并且化疗性脂肪肝声像图的IBS值明显大于正常肝的IBS值。
Conclusion The way in diagnosis of fatty liver by uses of echo intensity histograms to calculate the attenuation coefficient is of clinical value and a kind of objective and simple method. 结论运用超声直方图计算衰减系数来诊断脂肪肝是一种客观、简便的方法。
Methods The study make use of echo intensity histograms to calculate the attenuation coefficient,samples were taken from different depth of the liver and 53 patients were enrolled. 方法运用超声直方图测量53名患者同一切面不同深度的肝组织回声的灰阶值,并计算出衰减系数,按超声常规检查是否有脂肪肝和血甘油三酯是否正常分组,对各组的衰减系数进行对照分析。
A method of underwater target dimension identification was proposed by special bearing distribution data of body target echo based on identification theory of a target bearing method. 摘要阐述基于目标方位走向法的目标识别理论，提出利用体目标回波的空间方位分布信息识别水下目标尺度信息的方法。
The radar signal model in EW condition is discussed in this paper,including the model of emitting signal,the model of target echo signal,the model of jamming,the model of clutter and the model of noise. 文中建立了电子战条件下雷达信号环境数学模型，包括雷达发射信号数学模型，目标回波信号数学模型，电子干扰（有源干扰和无源干扰）信号数学模型，杂波数学模型以及噪声数学模型
This dissertation discusses mainly the realization of the radar signal simulator for an Airborne Phased-Array Radar (APAR), the simulation methods of target echo and clutter for APAR, and the application of hi-speed DSP chip in radar simulator. 尤其在近几年，雷达信号模拟器的研制已成为国内外军事研究领域的一个热门研究方向。本文以某种机载相控阵雷达信号模拟器的研制为背景，对目标回波信号和杂波的模拟理论和算法以及系统实现等问题进行了较为深入的研究，并通过采用高速、高性能的DSP，实现了对机载相控阵雷达信号的实时模拟。