【判断题】If the number of closed-loop poles is the same as the number of open-loop poles, then the number of individual root-locus branches terminating at finite open-loop zeros is equal to the number m of the...
【单选题】甲公司的销售部经常在新产品销售中发放贵重的赠品以促进消费。这一促销手段看起来很成功,但管理当局会觉得成本可能过高。以下哪项审计程序中,在确定该促销活动的有效性方面作用最小的是:()
B.
检查甲公司销售部门用来评价一项促销活动成败的标准。
D.
对促销期的边际收人和边际成本进行分析,并与促销之前相比较。
【单选题】The closed loop system differs from the open-loop system by the____.
B.
presence of a feedback
D.
presence of a computer
【单选题】The closed-loop system differs from the open-loop system by ______.
A.
the lack of a feedback
B.
the presence of a feed back
C.
the lack of a computer
D.
the presence of a computer
【单选题】可以用来查看进程并能查看进程发起程序的DOS命令是
【单选题】为了鼓励消费,销售部在新产品销售中发放贵重的赠品。这一促销手段看起来很成功,但管理当局觉得成 本可能过高。以下审计程序中在确定该促销活动的有效性方面的作用最小的是:
C.
对促销期的边际收入和边际成本进行分析,并与促销之前相比较。
D.
检查销售部门用来评价一项促销活动成败的标准。
【判断题】The Nyquist stability criterion determines the stability of a closed-loop system from its open-loop frequency response and open-loop poles.
【判断题】Loop gain is the product of branch transmittances of a open loop.
【简答题】Open loop control system