| 释义 |
converging, ppl. a.|kənˈvɜːdʒɪŋ|
[f. converge v. + -ing2.]
That converges.
1. Inclining towards each other or towards a common point of meeting; tending to meet in a point. In Optics, applied to rays of light which meet or tend to meet in a focus; in Bot., etc., to pairs of organs that bend towards each other.
converging fibres (Phys.): ‘fibres which connect different centres of the brain with each other, as the cortical substance with the centres at the base of the brain’ (Syd. Soc. Lex. 1882).
1776Withering Brit. Plants (1796) II. 219 Calyx tubular..with 5 converging scales at the mouth. 1794J. Hutton Philos. Light, etc. 75 More of the converging light will be absorbed. 1811J. Wood Optics ii. 15 Converging rays..approach to each other in their progress, and, if not intercepted, at length meet. 1855Macaulay Hist. Eng. IV. 14 Approaching the fated city by many converging routes. 1884Bower & Scott De Bary's Phaner. 244 They curve in a converging manner at the next node.
b. fig. of things immaterial that tend to concur or meet.
1841Myers Cath. Th. iii. xlviii. 185 Where all the converging lines of Scripture meet. a1871Grote Eth. Fragm. iv. (1876) 73 The ethical sanctions have a converging tendency towards the happiness of society as their end.
c. Consisting or formed of converging elements or parts.
1863Kinglake Crimea (1877) III. i. 86 Under a converging fire of artillery.
2. Math. Applied to an infinite series of terms or numbers, the sum of which, beginning with the first, continually approximates towards a definite limit as more and more terms are taken.
A simple converging series is exemplified by the series 1 + ½ + 1/4 + 1/8 + 1/16, etc., the limit of which is 2. converging fractions: = convergent B.
1727–51Chambers Cycl. s.v., Converging series, in mathematics. 1807Hutton Course Math. II. 300 So arranged..that the series produced may be a converging one, rather than diverging: and this is effected by placing the greater terms foremost in the given fluxion. 1885Watson & Burbury Math. Th. Electr. 35 Expanded in a converging series of ascending powers of µ.
3. Causing convergence.
1833N. Arnott Physics (ed. 5) II. 202 The gathering or converging power of any glass. 1860Tyndall Glac. ii. xxiv. 354, I placed a large converging lens in the sunbeams. |