Firms in many African countries indicate that the largest obstacle to doing business is the powerconstraint.
很多非洲国家的企业表示，其经营面临的最大障碍是电力不足。
2
To evaluate the enhancement effect of the studied channel reasonably, the assessing method of the same pump powerconstraint is adopted.
为了合理评价所研究通道的强化效果，采用相同泵功的评价方法对结果进行了讨论。
3
We now define the (information) capacity of the channel as the maximum of the mutual information between the input and output over all distributions on the input that satisfy the powerconstraint.