Feedback control is critical in the scalable optimization of Internet advertising, and it is, therefore, an enabling technology. However, it is challenging to model the plant and design the controller because the plant is nonlinear, time varying, stochastic, and poorly known. A closed-loop system model easily becomes unrealistic or extremely complicated and intractable to analyze.

中文翻译：

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程序化广告中的反馈控制：实时出价优化的前沿

反馈控制在Internet广告的可扩展优化中至关重要，因此，它是一种启用技术。然而，由于工厂是非线性的，时变的，随机的并且鲜为人知的，因此对工厂建模和设计控制器具有挑战性。闭环系统模型很容易变得不切实际或极其复杂且难以分析。