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- Application of Gaussian echo model in ultrasonic echo simulation and discussion of the iterative method 高斯回波模型在超声回波模拟中的应用及其迭代算法的讨论
- Ultrasonic echo model 超声回波模型
- The simulated annealing method is applied to the simulation of ultrasonic echo in this paper. 摘要本文应用模拟退火算法来改进超声回波模拟问题。
- By interaction between ultrasonic waves and elastic medium, it has carried much information of material, which are received in the form of ultrasonic echo signals. 它是利用超声换能器的振动产生的超声波与弹性介质相互作用,从而携带大量有关材料性能的信息,这种信息以超声回波信号的形式被接收到。
- As the basis of the tracking algorithm, an echo model is the key to radar altimeter design. 雷达高度计回波模型是设计、检验高度计跟踪算法的基础,是高度计设计的关键性环节。
- Methods 17 patients were examined by trans thoracic echocardiography(TTE),and observed the membrane shape ultrasonic echo、blood stream change in aortic canal. 方法采用经胸超声(TTE)检查17例夹层动脉瘤患者,观察主动脉管腔内有无膜样回声及管腔内血流情况。
- As the sample of eraser, ultrasonic echo signal is collected to further prove the relationship between the echo displacements and the changing of temperature in the experiment. 实验中利用橡皮作为样品,采集超声回波信号,进一步验证了回波信号与温度变化之间的关系。
- In order to analyze imaging problems in spaceborne bistatic SAR system, it is important to establish a relevant radar echo model. 摘要为了研究星载双基地SAR系统成像的相关问题，必须先建立其回波信号模型。
- According to the idea of establishing monostatic target model,the echo model for a moving target model along bistatic baseline was established by the theory of analytic geometry. 根据建立单基地雷达运动点目标回波模型的分析思路,运用解析几何的方法,建立了双基地沿基线运动目标的回波模型。
- Based on these, an echo model of spaceborne bistatic SAR system for image processing is established.Through simulation, the error of range model is analyzed. 通过仿真计算分析了信号模型中距离模型的误差，结果表明，误差对成像的影响完全在可接受的范围以内。
- It is proved by simulation and experiment that we can obtain the TDE value precisely by this method and simultaneously the effect on TDE because of the ultrasonic echo specialty is avoided. 仿真与实验研究表明，该方法在高信噪比下可以精确得到时延估计值，同时避免了超声回波信号的慢衰减高频振荡特性对时延估计带来的影响。
- The echo model of moving target is established based on three channels with the slant-placed antennae in terms of the equivalent phase center principle. 利用等效相位中心原理建立了天线斜置情况下三通道运动目标回波信号模型，给出了天线倾斜角对动目标检测、最小可检测速度和盲速的影响。
- In the simulator, sum-difference beams method based on point scatterer echo model which includes the random fluctuation character of object radar cross section is used to simulate target echo. 对于目标回波的模拟，本文在考虑目标雷达散射截面积起伏特性的基础上，采用基于点散射体回波信号模型的和差波束法来实现。
- Ultrasonic Echo Ranging Equipment 超声回波测距设备
- A bispectrum-based approach is applied to extract feature information of cementing oil well from ultrasonic echoes. 给出了基于双谱提取固井胶结特征信息的方法,并利用这种方法对实际信号进行了处理。
- Then the radar echo models and their realization methods were studied, especially on radar targets and land clutter. 然后分析了雷达回波信号模型，重点讨论了雷达目标和地杂波的信号模型及产生方法。
- 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。
- Statistic evaluation of ultrasonic echo feature value 超声回波特征值的统计学分析方法
- The doctors gave him an ultrasonic brain scan. 医生给他做了脑部超声波扫描检查。
- Standing by him was a model worker. 站在他旁的是一位劳动模范。
