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。
At the basis of designing underwater geomorphological measurement system concrete plan , this dissertation makes study and analysis on its measuring depth of water sonar system and dynamic global position system . this dissertation simply and thoroughly introduces the state of underwater acoustic transducer and array . it covers the basic situation , the study benefits , the classification and role , analyses the performance index , designs the performance parameter relating to themselves performance synthesis and sonar equation 论文在制定水下地貌测量系统技术方案的基础上,论述了该系统中的水深测量声纳系统和动态定位系统( dgps ) ,分析了水声换能器及基阵的性能指标,确定了换能器及基阵的主要性能参数。