有效质量系数是指每个质点质量与其在某一振型中相应坐标乘积之和与该振型的主质量（或者说该模态质量）之比，即为该振型的有效质量系数。
地震时人工岛内回填土只有一部分有效质量参与地震响应，通过模型试验，高径比小于1/3的人工岛回填土有效质量系数在0.2左右。
Through model tests, it has been found that the effective mass coefficient for the soil is around 0.2 for artificial islands with height-to-diameter ratio being smaller than 1/3.
数值计算结果表明，有效质量和矩形势垒参数对透射系数的影响同等重要。
Numerical analysis shows that the effective masses cannot be ignored in comparison with parameters of rectangular barrier for the transmission coefficient.
仿真结果表明，提出的对比度增强方法能根据对比度增强系数实现不同程度的对比度增强，有效地提高了显示设备的图像显示质量。
The simulation results show that the proposed contrast enhancement method can realize contrast enhancement in different extent, which improves the image quality of display devices effectively.
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