There are many kinds of image fusion methods, such as information entropy, mutual information, mean square error, peak signal to noise ratio and mean grads.

医学图像融合的效果评价方法有很多，如信息熵、 互信息、均方值、峰值信噪比和平均梯度等。

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Element position error, mutual coupling between elements, and the difference in frequency responses of receiver channels influence directly the performance of array radar signal processing.

阵元位置误差、阵元间互耦的影响、接收机通道的频率响应的差异都直接影响着雷达阵列信号处理的性能。

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For the WCDMA system this complex, many factors and mutual coupling, WCDMA radio network planning is comprehensive and diversity, the theoretical capacity of the error is larger cover predictions.

对于WCDMA这样的复杂系统，影响因素众多且相互耦合，WCD MA无线网络规划具有综合性和多元性，理论上的容量覆盖预测结果往往误差较大。

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However, as index-based mutual funds and ETFs continue to gain popularity and active managers are increasingly pressured to control their performance tracking error relative to benchmark indexes, the markets could become less efficient.

FORBES: Equal-Weight Indexers Didn't Suck Wind For A Decade