Greek letter, from Hebrew, literally "little mouth." As the name of the mathematical constant, from 1841 in English, used in Latin 1748 by Swiss mathematician Leonhart Euler (1707-1783), as an abbreviation of Greek periphereia "periphery." For the meaning "printer's term for mixed type," see pie (3).
雙語例句
1. We proposed P 2 I algorithm combined with proportional controller and PI controller.
提出了結(jié)合了比例控制器和PI控制器 特點(diǎn)的P2I算法.
來自互聯(lián)網(wǎng)
2. The carbonization and the graphitization of PI filament were described.
敘述了PI原絲的碳化和石墨化過程.
來自互聯(lián)網(wǎng)
3. Some AQM algorithms, such as REM and PI, explore this aspect.