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单词 Bernoulli
释义 Bernoulli|bəˈnuːlɪ|
The name of a Swiss family which in the 17th and 18th centuries contained several eminent mathematicians and scientists, applied to various principles, theorems, etc., formulated by them (see quots.). Hence Berˈnoullian a.
B.'s formula and B.'s theorem in hydrodynamics were proposed by Daniel Bernoulli (1700–1782); B.'s numbers and B.'s theorem in statistics were proposed by Jacob (also known as James) Bernoulli (1654–1705).
1749J. Stirling Differential Method 94 The first series is not extended to those cases in which the first ordinate touches the curve, nor does Bernoulli's series extend to those cases wherein the last ordinate touches the curve.1842A. De Morgan Diff. & Integr. Calculus xiii. 247 The values of U, U′, &c. are called the numbers of Bernoulli; and though they do not follow a visibly regular law, yet the connexion between them is simple.Ibid. 248 The development of tan x by Bernoulli's numbers.1865I. Todhunter Math. Theory Probability vii. 71 In the fourth part of the Ars Conjectandi is the enunciation and investigation of what we now call Bernoulli's theorem.Ibid. xi. 226 Let x denote the age expressed in years; let ξ denote the number who survive at that age out of a given number who were born; let s denote the number of these survivors who have not had the small-pox... Daniel Bernoulli's formula then gives the value of s.1875Encycl. Brit. I. 114/1 The basis of Bernouilli's [sic] Theory of Pipes.1876Messenger Math. VI. 49 Bernoullian and Eulerian numbers.1888Encycl. Brit. XXIII. 14/1 Bernoullian numbers.1920L. Bairstow Appl. Aerodynamics vi. 281 The simple form of Bernoulli's equation developed in the chapter on fluid motion may be applied separately to the two parts of streamlines which are separated by the actuator disc.1922Glazebrook Dict. Appl. Physics I. 26/2 Bernoulli's theorem. Along any stream line in a liquid subject only to gravity p + gρz + ½ρv2 = constant, p being the pressure at a point at a depth z below the plane of reference, ρ the density, and v the velocity.1937Mind XLVI. 488 The least rigid of these suggested conditions is that the series must be ‘Bernoullian’.
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