The results show that the average absolute value of relative errors between predictive and measured values of hardness is 5.90%, the prediction accuracies of adhesion and impact resistance are 100%.
结果表明：硬度预测值与实验值相对误差的绝对值的平均值为5.90%，附着力预测准确率为100%，耐冲击性预测准确率为100%。
Some forecasting procedures sum the absolute values of the errors and may report this sum, or divide it by the number of forecast attempts to produce the average forecast error.
一些预测程序总计错误的绝对值而且可能报告这总数， 或藉着预测尝试的数字分开它生产平均的预测错误。
As the name suggests, the mean absolute error is an average of the absolute errors, where is the prediction and the true value.
顾名思义，平均绝对误差是绝对误差的平均值，其中fi是预测值而yi是实际值。
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