The common control methods, such as step control, integrate control, feed back, proportional, integral, derivative and feed forward, were described.

阐述了温室控制中常用的方法，如分步控制、整体控制、反馈控制、比例控制、积分控制、微分控制、前馈控制的特点。

youdao

Liu Yongxing reckons the casualties will be the small and inefficient feed producers that control about 80% of the domestic market.

CNN: Hope Takes On the World

"This is directly attributable to the impact and effectiveness of feed bans as a primary control measure for the disease, " he said.

CNN: Mad cow case confirmed in California

"This is directly attributable to the impact and effectiveness of feed bans as a primary control measure for the disease, " he said last month.

CNN: USDA quarantines 2 farms in mad cow investigation