出租车计价器“本机计程MPE用绝对误差表示”的讨论

It Should be Represented by Absolute Error that the Journeys Error by a Taximeter that Not Installed in a Vehicle

试验表明四点:1.本机计程的开始阶段的Δ相对皆超差; 2.本机计程不论多少,500≤k≤3000,始终有Δ绝对<±2m; 3. MPE用相对误差表示,有问题; 4. MPE用绝对误差表示,是合理的。

Experiments show four points：A taximeter is not installed in the vehicle. The relative errors of starting distances are over MPE. When 500 ≤k ≤3000, all distances , their absolute errors are less than ±2m. Therefore, it is a mistake that MPE is showed by relative error, it is a right that MPE is showed by absolute error.