Error message: This is not a valid model definition.

错误信息：这不是一个有效的模型定义。

youdao

A second modeling error that we observed results from the reuse of the same activity within a process model.

我们观察到的第二种建模错误是由某一流程模型中对同一活动的重用造成的。

youdao

A network error could result from an unauthorized URL due to model access or an incorrect URL.

由于模型访问或错误url而产生的未授权URL可能会导致网络错误。

youdao

Simplifications allow a permissible level of error to enter into the model in the hopes of making the it simple enough to run quickly, the concept understandable, and the results readable.

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Many thanks to Mike Cowan (author of the Cowan LRA Forecasting Model) for pointing out an error in a prior version of this post, and for providing the numbers behind the chart.

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In fact, if you try to, say, call up a Web page while on a voice call with the Verizon model, you get an error message warning the two things can't be done simultaneously.

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