常見(jiàn)例句雙語(yǔ)例句The launch system uses ultrasonic echo and reflection of the time difference to measure the distance test.該零碎應(yīng)用發(fā)射超聲波與反射回波時(shí)間差來(lái)測(cè)量待測(cè)間隔。Based on the mode of ultrasonic echo, this paper designs a frequency-dependent compensation filter to compensate the absorbed attenuation when the ultrasound transmits in a tissue.在建立超聲回波信號(hào)的數(shù)學(xué)模型的基礎(chǔ)上，設(shè)計(jì)了頻率補(bǔ)償濾波器。 有效補(bǔ)償了超聲傳播過(guò)程中的吸收衰減；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.仿真與實(shí)驗(yàn)研究表明，該方法在高信噪比下可以精確得到時(shí)延估計(jì)值，同時(shí)避免了超聲回波信號(hào)的慢衰減高頻振蕩特性對(duì)時(shí)延估計(jì)帶來(lái)的影響。 返回 ultrasonic echo