And specific properties for several kinds of lead - free solder are analogized.
分析了幾類正在實用化的無鉛焊料特性.
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DC coefficients were analogized after DCT transformation, and they were considered to be appropriate embedded places.
首先分析DCT變換后直流系數(shù)的特點并確定嵌入位置,然后提出一類根據(jù)水印信息量化DCT直流 系數(shù)嵌入水印的算法.
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