According to the block classification, it embedded the watermark into the larger coefficients of the mid-frequency of selected blocks.
水印为二值图像,根据块分类以不同的嵌入强度嵌入到所选择块的中频系数中。
参考来源 - 一种基于DCT的模糊聚类自适应水印算法·2,447,543篇论文数据，部分数据来源于NoteExpress
The NdFeB alloy was melted in a vacuum mid-frequency induction furnace and then homogenized.
钕铁硼合金用真空中频感应炉熔制。
Venation wave spectrum analysis finds out shape-structure change of mid-frequency signal fluctuation.
脉络波谱图分析查明了中范围（频率）信号波动的形态结构变化。
Full bridge topology was used in the main circuit, IGBT was used as power switching device, and micro-crystal core was used in mid-frequency transformer.
其主电路采用全桥式拓扑结构，以IGBT管为功率开关器件，中频变压器使用微晶磁心。
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