quadrature
n. 求面积, 正交, 弦 [计] 正交
发音
词形变化
释义与例句
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1.
The process of making something square; squaring.
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2.
The act or process of constructing a square that has the same area as a given plane figure, or of computing that area.
可数 不可数 数学1976, D. T. Whiteside (editor), The Mathematical Papers of Isaac Newton, Volume 7: 1691-1695, Cambridge University Press, page 3, Craige was then on the point of publishing a short tract wherein he expounded a systematic (if far from general) 'Method of determining the quadrature of figures comprehended by straight lines and curves', there gathering a variety of techniques of rational algebraic quadrature and arc-rectification […] .
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3.
The calculation of a definite integral by numerical means.
可数 不可数 数学1992, Bernard Bielecki, SINC Quadratures for Cauchy Principal Value Integrals, T.O. Espelid, Alan Genz, Springer, Numerical Integration: Recent Developments, Software and Applications, page 81, Three types of SINC quadratures are surveyed for the evaluation of Cauchy principal value integrals ∫_ΓF(t)dt/(t-x), x∈Γ, where Γ is an arc in the complex plane. Under suitable assumptions on F, the quadrature errors are of order O(e), where N is the number of quadrature nodes and c is a constant independent of N.
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4.
A situation in which the directions of two celestial bodies (or a celestial body and the Sun) form a right angle from the perspective of the observer.
可数 不可数 天文When the Moon is in quadrature, it appears in the sky as a half-moon.
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5.
The act or process of solving an indefinite integral by symbolic means.
可数 不可数 数学 -
6.
The condition in which the phase angle between two alternating quantities is 90°.
可数 不可数 物理 -
7.
A painting painted on a wooden panel.
可数 不可数 艺术
词汇关系
上位词 1
相关短语
词源
Borrowed from Latin quadrātūra.
来源：wiktionary