阐述SQUID的工作原理和噪声特性，分析其在超低频通信中的低温控制、环的正交性和混沌行为，为工程应用提供理论依据。

Then it presents the low temperature control techniques, the perpendicularity of the three loops and the chaos conduct of SQUID, which provides theoretical basis fort.

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介绍一种恒温控制的半导体制冷器，用于临床上的低温治疗。

A semiconductor cooler with constant temperature is introduced in this paper. And it is used in clinical cure by low temperature.

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