通过对二次群光接收机噪声性能的测量，比较了各种设计方案，验证了理论分析的正确性。

By measuring the receiver's noise performance of second order multiplex, various design schemes are compared and the correctness of the theoretical analysis is verified.

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上周日，在日本横芝光町一群看起来不像农民的人出现在了田间，他们头上带着干净整洁的毛巾，脚上的皮靴还闪闪发光。

YOKOSHIBAHIKARI, Japan — A motley group of unlikely farmers descended on the countryside here one recent Sunday, fresh towels around their necks, shiny boots on their feet.

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在此基础上，研究了气泡群散射光的强度分布特性和能量分布特性。

Based on single bubble's light scattering properties, the characteristics of light scattered by bubble populations are studied.

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