英语词汇upper and lower bounds怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	upper and lower bounds
释义	upper and lower bounds 简明释义上界和下界：在偏序集中，如果存在一个元素y，对于集合B中的所有元素x，都有x≤y，则y称为集合B的上界。如果存在一个元素z，对于集合B中的所有元素x，都有x≥z，则z称为集合B的下界。网络释义 1 ?上下界限 ... 国际邮政联盟 UPI (Union Postale Internationale) 上下界限 upper and lower bounds 频率上限 upper frequency limit ... 2 ?上下界上下界 3 ?上界和下界 ... 可变上下界 variable bound 理论下界 theory lower-bound 上界和下界 upper and lower bounds ... 短语 1 global upper and lower bounds 整体上下界 ; 上下界整体估计 2 lower and upper bounds 上下界 3 bounds upper and lower 上下限双语例句 1 And at high SNR, the upper and lower bounds on the ergodic capacity are close to its true value. 接收信噪比较大时，平均信道容量上下限基本接近其实际值。 2 We give expressions or upper and lower bounds of the normwise backward errors for six kinds of problems. 对其中的六类问题，给出了范数型结构向后误差的表达式或较精确的上、下界估计。 3 Range Queries can be inclusive or exclusive of the upper and lower bounds. Sorting is done lexicographically. 范围查询可以包含或者不包含最大值和最小值，排序是按照字典顺序来排序的。
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