...直流系数,资讯隐藏,无失真,直方图,数位浮水印 [gap=2623]Keywords: Discrete cosine transformation, Low-frequency coefficient, Data hiding, Lossless, Histogram, Digital watermark ..
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The result shows that average absorption coefficient and noise reduction coefficient separately equal to0.58and0.60 and fine property of sound absorption at middle-low frequency.
结果表明材料的平均吸声系数和降噪系数分别达0。58和0。60，且材料的中低频吸声性能优良。
We usually take the coefficient 1.25 times the average torque as the low frequency maximum torque to calculate the low frequency braking voltage.
矿井提升绞车在计算低频制动电压时，通常采用低频最大力矩是平均力矩1.25倍的折算系数。
According to local gradient information, wavelet low frequency coefficient obtained from source image is selected to compose respective low frequency coefficient of the fused image.
根据局部梯度信息对源图像的小波低频系数进行选择，获取融合图像的对应低频系数。
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