本文研究一类非线性神经网络自适应控制系统，提出一种基于双误差——辨识误差和跟踪误差的新控制方案。
A class of nonlinear neural network adaptive control systems is studied and a new design concept based on double errors was proposed in this paper.
你们今天将看到新的数据，表明为什么提出的每项控制脊髓灰质炎方案在20年期间造成的人类痛苦和金钱方面的代价将高于完成根除工作所需的费用。
You will be seeing today new data that show why, over a 20-year period, every proposed option for controlling polio will cost more, in human suffering and dollars, than finishing eradication.
就在今年，所有新的投保方案都必须为消费者提供免费的预防护理，这样我们就能在第一时间控制可预防的传染病。
This year, all new insurance plans will be required to offer free preventive care to their customers - so that we can start catching preventable illnesses and diseases on the front end.
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