sonar echoes中文什么意思

例句与用法

1. A study on classification of transient sonar echoes
   的瞬态回波分类研究
2. Denoising processing of active sonar echo data based on matlab and wavelet transform
   和小波变换的主动声纳回波数据消噪处理
3. The thesis reviews the theory which is the basis of synthetic aperture processing and introduces five algorithms of image reconstruction : the coherent addition provides a good opportunity for the real time sas ; the envelope processing can work when sonar echo returns lack phase coherence ; the i - q processing can reduce the sampling rate ; the broadband and ctfm processing are both aimed to increase the sas mapping rate
   讨论了用于重构图象的五种算法，包括简单的可进行实时处理的相关合成法，可以在缺乏相位信息时使用的包络处理法，可以降低采样率、减少运算量、存储量的正交处理法，可以提高声纳运行速度，从而提高成象率的宽带处理法和ctfm法等五种算法。