错误信息：这不是一个有效的模型定义。

Error message: This is not a valid model definition.

youdao

运用上述理论建立了质量管理体系的一种实用有效的模型。

Based on the mentioned theories, a practical and effective model of QMS is established.

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该方法通过少量样本训练出有效的模型，实现对间歇故障的诊断。

Then the SVM based intermittent faults diagnostic method is presented. With the features extracted from small samples, the SVM models are trained to diagnose intermittent faults.

youdao

Now we need to think about a model of the stock market And the model we're going to use is based on what's called the Efficient Market Hypothesis.

现在需要想一想一个股市的模型是怎样的,我们要用的模型是,基于有效率市场假说的。

麻省理工公开课 - 计算机科学及编程导论课程节选

What this model asserts is that markets are informationally efficient.

这个模型说,这个市场处理信息有效的。

麻省理工公开课 - 计算机科学及编程导论课程节选

Jeremy Siegel, in his book, which is assigned for this course, is really emphasizing this capital asset pricing model, emphasizing the kind of efficient portfolio frontier calculations that I've done.

杰里米·西格尔的著作，是本课的指定书目，书中着重讲述了资本资产定价模型，以及有效边界等的计算方法,这部分我已经讲完了。

耶鲁公开课 - 金融市场课程节选