【Key words】 heterodyne balanced receiver； beam-slipper coefficient； stochastic resonance； frequency shifting； twice sampling；
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twice sampling stochastic resonance 二次采样随机共振
twice-sampling 二次采样
twice sampling frequency transformation 二次采样频率变换
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According to the feature of contacting measurement, the dissertation first puts forward the twice-sampling planning method for free-form surface in order to improve measuring efficiency.
根据接触测量的特点，为提高测量效率，本文提出了一种两次采样的曲面数字化规划方法。
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