在互易原理的基础上，得到了计入相邻目标二次散射的散射场的积分表达式。
The integral expressions for scattered fields including the second-order scattering terms are given based on the reciprocity theorem.
但当发射器和接收器位于不同深度时，这样获得的结果可能不符合互易原理。
But in cases when transmitter and receiver are located at different depths, the results of such calculation may contradict with principle of reciprocity.
有关的问题与概念有：凸算子，互易集与互易原理，H广义解，算子微分方程等。
Related problems and concepts include; convex operator, reciprocity set and reciprocity principles, H-generalized solution and operator-differential equation, etc.
其中包含了缝隙之间的内（外）部互耦以及介质的影响。缝隙之间的内（外）部互耦是从缝隙的口径电压出发、将缝隙等效为磁流源、通过互易原理而获得。
The expressions of external and internal coupling were derived from the reciprocity theorem by analysing slot voltage distribution in this paper, which invoked magnetic current to slots.
克服双击问题的一种可能技术是利用互易性原理。
One possible technique to overcome the double impact problem is to use the principle of reciprocity.
本文叙述自由场互易法水声声压标准装置的原理、组成和实验结果。
This paper describes the principle, construction and experimental results of the standard apparatus for underwater sound pressure by using the free-field reciprocity method.
结合“声学互易性原理”及车内噪声有限元分析，提出一种车内结构声源辨识的方法。
Combining with the reciprocity principle of acoustic system and the interior noise finite element analysis, an approach fo;
结合“声学互易性原理”及车内噪声有限元分析，提出一种车内结构声源辨识的方法。
Combining with the reciprocity principle of acoustic system and the interior noise finite element analysis, an approach fo;
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