echo arrival是什么意思_echo arrival中文

echo arrival中文什么意思

echo: n. (pl. echoes) 1.回声，反响；共鸣，反 ...
arrival: n. 1.到达，抵达。 2.到达者；到达物。 3.出现， ...
and arrival: 及到达
arrival: n. 1.到达，抵达。 2.到达者；到达物。 3.出现，登场。 4.新生婴儿。 The new arrival was a daughter. 新生婴儿是一个女孩。 a new arrival 新来者；新到货；新生儿。 arrival at a conclusion 得出结论。 on his arrival at sixty 年满六十。 cash on arrival 【商业】货到付款。 delivery on arrival 【商业】货到即交。
on arrival: 到达货物相抵后净额; 抵达时; 一到达就…

下载手机词典可随时随地查词查翻译

The claim has been made upon the results that the wmt method should be used in the area near the vertical , while the phase difference method in slant beams and a rule has been given to select among those two methods according to the " effect value " on condition the depth is known for the consideration of improving the measurement precision , this paper studies the factors which affect the toa measurements , and three expressions of precision has been introduced as to applications of phase difference method , this paper introduces an automatic hunting method based on amplitude power to get the range of echo arrival
采用方差分析的方法，使用重复海试数据对wmt法和相位差法的优劣进行了分析，指出了垂直附近应该使用wmt法，而倾斜波束应该使用相位差法；给出了在深度真实值已知前提下wmt法和相位差法使用的判决准则，即根据效应值的大小来选择。本文从提高测量精度角度出发，分析并验证了影响toa测量精度的因素；给出了三种精度表示。在应用相位差法时，引入了一种基于幅度能量的区间自动搜索方法；实验表明该方法能很好地确定回波到达的大概时间范围。

echo arrival中文什么意思