performance n. 1.执行,实行,履行;完成;实现;偿还。 2.行为,动作,行动;工作。 3.性能;特性。 4.功绩;成绩。 5.演奏;弹奏;演出;(驯兽等的)表演;把戏。 6.【物理学】演绩。 a performance test 【机械工程】性能试验。 high performance 高度准确,性能优良。 an afternoon performance 午后的演出,日戏。 two performances a day 一天演两场。 a fine [wretched] performance 成绩好[坏]。 put a monkey through its performances 使猴子玩种种把戏。 performance in [of] horse-manship 马戏;马术表演。
Analyzing the performance curves of pumps and network in a variable flow pumping system, concluding the influence factors of energy saving and the optimal ranges of variable frequency drive ( vfd ) 摘要通过分析变频水泵及管网系统在变工况下的特性曲线,得出影响水泵变频节能效果的主要因素和变频调速的适用范围。
To tune up the frequency of power supply by the transducer in the system, this adjusting make the speed of electromotor and performance curve of pump change . at last, it make the status of a pump alter 在变频调速恒压供水系统中,单台水泵工况的调节是通过变频器来改变电源的频率f来改变电机的转速n,从而改变水泵性能曲线得以实现的。