| 单词 | difference engine |
| 释义 | > as lemmasdifference engine difference engine n. now historical a mechanical calculating machine which, using only the operation of addition, is capable of producing tables of values for a variety of mathematical functions; cf. analytical engine n. at analytical adj. Compounds.The machine, which is widely regarded as a precursor to the modern computer, was proposed and designed by Charles Babbage in 1822 (see quot. 1822); a working version was built in 1853 by George and Edward Schuetz. ΘΚΠ society > computing and information technology > hardware > computer > [noun] > mechanical calculating machine1832 mill1837 difference engine1843 1822 C. Babbage Let. to Sir Humphry Davy 6 For the purpose of demonstrating the practicability of these views, I have chosen the engine for differences, and have constructed one of them which will produce any tables whose second differences are constant.] 1843 London, Edinb., & Dublin Philos. Mag. 23 236 The Difference Engine might be constructed with more or less advantage, by employing various mechanical modes for the operation of addition. 1940 W. J. Eckert Punched Card Methods Sci. Computation v. 56 With slight modification one of these multipliers might become a remarkable ‘Difference Engine’. 2005 D. A. Grier When Computers were Human (2007) iv. 69 Gould..had discovered the difference engine while traveling in Europe and had been impressed with its potential. < as lemmas |
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