This paper presents the theory of passive localization for underwater sources based on Acoustic Ray channel modelling.

本文论述以声线理论信道模型为基础的水声被动定位原理。

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The integral representation for acoustic ray is constructed by the product of the generalized reflection-transmission coefficients corresponding to the specification of the generalized ray paths.

任意一条广义声线的积分表达式，则可根据每一条声线段的性质，由各反射界面上的广义反射、透射系数直接给出。

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The ray approach is adopted to study the acoustic field in theory, and the ultrasonic experiment has been carried out in laboratory to model the underwater waveguide.

理论上采用射线近似方法分析了时间反转声场特性，实验上在实验室内开展了水下波导的超声模拟实验。

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An optical-character-recognition machine for the blind that's capable of reading most types of printed text aloud, the CCD flatbed scanner, speech-recognition software, the first synthesizer that created sounds virtually indistinguishable from those produced by their acoustic counterparts, and a whole bunch of other nifty things we can barely comprehend came from Ray's brain.

CNN: STORY HIGHLIGHTS