quadrature

/kwod-ruh-cher, -choor/US // ˈkwɒd rə tʃər, -ˌtʃʊər //UK // (ˈkwɒdrətʃə) //

正交,正则,正弦,四分法

Definitions

n.名词 noun

1
- : the act of squaring.
- : Mathematics. the act or process of finding a square equal in area to a given surface, especially a surface bounded by a curve.the act or process of finding an area or calculating an integral, especially by numerical methods.a definite integral.
- : Astronomy. the situation of two heavenly bodies when their longitudes differ by 90°.either of the two points in the orbit of a body, as the moon, midway between the syzygies. those points or moments at which a half moon is visible.
- : Electronics. the relation between two signals having the same frequency that differ in phase by 90°.

So that to find equivalent single words in translation, appears often as hopeless as the quadrature of the circle.
Among his mathematical investigations must not be omitted the quadrature of the parabola.
In 1644 he published a tract on the properties of the cycloid in which he suggested a solution of the problem of its quadrature.
Yet, from time to time, treatises are published which boldly announce that they set forth the quadrature of the circle.
Triangulation and quadrature of the beacons works for navigation—only it follows its own rules.