Well-bounded operators are those which possess a bounded functional calculus for the absolutely continuous functions on some compact intervals.
良有界算子是这样一类算子，它对于在某个紧区间上绝对连续的函数具有有界的函数演算。
2
Cash register, filling gas, car body construction, in line with the characteristics of public transport operators, reflects the functional purpose of the supremacy.
现金出纳机，灌装气体、车身结构，与特点，反映了公共交通机构功能的霸主地位。
3
Using the modulus of smoothness and K-functional, direct and inverse theorems of simultaneous approximation for a kind of multivariate trigonometric polynomial operators are established.