Definition of quadrature in English:

quadrature

noun ˈkwɒdrətʃəˈkwɑdrətʃər

mass noun

1Mathematics
The process of constructing a square with an area equal to that of a circle, or of another figure bounded by a curve.
〔数〕求积分，求面积
Example sentencesExamples
- He generalised Gauss's method of quadrature and expressed the polynomials which are involved as a determinant.
- Craig published several more papers on the logarithmic curve, the curve of quickest descent and quadrature of figures.
- This book is a treatise on infinite series, summation, interpolation and quadrature.
- He also considered curves of double curvature on the sphere and the quadrature of parts of a spherical surface.
- Both in-phase and quadrature measurements are recorded.
2Astronomy
The position of the moon or a planet when it is 90° from the sun as viewed from the earth.
〔天文〕方照；上弦；下弦
Example sentencesExamples
- When the Sun-Moon system is in quadrature relative to the Earth, the combined gravitational forces are not as strong.
- The planet is at east quadrature (ninety degrees east of the Sun) on the 26th.
3Electronics
A phase difference of 90 degrees between two waves of the same frequency, as in the colour difference signals of a television screen.
〔电子〕转象差，九十度相位差
Example sentencesExamples
- The MT312 is a single-chip variable rate digital quadrature phase shift keying satellite demodulator.
- The L5 signal that will appear with the Block IIF satellites in 2006, will have quadrature phase skip keying.
- The quadrupolar echo pulse sequence was employed using quadrature detection with complete phase cycling of the pulse pairs.
- It features RS - 422-compatible quadrature output, and programmable resolution and output frequency.
- A method and apparatus for equalizing a received quadrature amplitude modulated signal is disclosed.

Origin

Mid 16th century (as a mathematical term): from Latin quadratura 'a square, squaring', from quadrare (see quadrate).

Definition of quadrature in US English:

quadrature

nounˈkwädrəCHərˈkwɑdrətʃər

1Mathematics
The process of constructing a square with an area equal to that of a circle, or of another figure bounded by a curve.
〔数〕求积分，求面积
Example sentencesExamples
- He generalised Gauss's method of quadrature and expressed the polynomials which are involved as a determinant.
- This book is a treatise on infinite series, summation, interpolation and quadrature.
- Both in-phase and quadrature measurements are recorded.
- Craig published several more papers on the logarithmic curve, the curve of quickest descent and quadrature of figures.
- He also considered curves of double curvature on the sphere and the quadrature of parts of a spherical surface.
2Astronomy
The position of the moon or a planet when it is 90° from the sun as viewed from the earth.
〔天文〕方照；上弦；下弦
Example sentencesExamples
- The planet is at east quadrature (ninety degrees east of the Sun) on the 26th.
- When the Sun-Moon system is in quadrature relative to the Earth, the combined gravitational forces are not as strong.
3Electronics
A phase difference of 90° between two waves of the same frequency, as in the color difference signals of a television screen.
〔电子〕转象差，九十度相位差
Example sentencesExamples
- A method and apparatus for equalizing a received quadrature amplitude modulated signal is disclosed.
- The L5 signal that will appear with the Block IIF satellites in 2006, will have quadrature phase skip keying.
- The quadrupolar echo pulse sequence was employed using quadrature detection with complete phase cycling of the pulse pairs.
- It features RS - 422-compatible quadrature output, and programmable resolution and output frequency.
- The MT312 is a single-chip variable rate digital quadrature phase shift keying satellite demodulator.

Origin

Mid 16th century (as a mathematical term): from Latin quadratura ‘a square, squaring’, from quadrare (see quadrate).

单词	quadrature
释义	Definition of quadrature in English: quadrature noun ˈkwɒdrətʃəˈkwɑdrətʃər mass noun 1Mathematics The process of constructing a square with an area equal to that of a circle, or of another figure bounded by a curve. 〔数〕求积分，求面积 Example sentencesExamples He generalised Gauss's method of quadrature and expressed the polynomials which are involved as a determinant. Craig published several more papers on the logarithmic curve, the curve of quickest descent and quadrature of figures. This book is a treatise on infinite series, summation, interpolation and quadrature. He also considered curves of double curvature on the sphere and the quadrature of parts of a spherical surface. Both in-phase and quadrature measurements are recorded. 2Astronomy The position of the moon or a planet when it is 90° from the sun as viewed from the earth. 〔天文〕方照；上弦；下弦 Example sentencesExamples When the Sun-Moon system is in quadrature relative to the Earth, the combined gravitational forces are not as strong. The planet is at east quadrature (ninety degrees east of the Sun) on the 26th. 3Electronics A phase difference of 90 degrees between two waves of the same frequency, as in the colour difference signals of a television screen. 〔电子〕转象差，九十度相位差 Example sentencesExamples The MT312 is a single-chip variable rate digital quadrature phase shift keying satellite demodulator. The L5 signal that will appear with the Block IIF satellites in 2006, will have quadrature phase skip keying. The quadrupolar echo pulse sequence was employed using quadrature detection with complete phase cycling of the pulse pairs. It features RS - 422-compatible quadrature output, and programmable resolution and output frequency. A method and apparatus for equalizing a received quadrature amplitude modulated signal is disclosed. Origin Mid 16th century (as a mathematical term): from Latin quadratura 'a square, squaring', from quadrare (see quadrate). Definition of quadrature in US English: quadrature nounˈkwädrəCHərˈkwɑdrətʃər 1Mathematics The process of constructing a square with an area equal to that of a circle, or of another figure bounded by a curve. 〔数〕求积分，求面积 Example sentencesExamples He generalised Gauss's method of quadrature and expressed the polynomials which are involved as a determinant. This book is a treatise on infinite series, summation, interpolation and quadrature. Both in-phase and quadrature measurements are recorded. Craig published several more papers on the logarithmic curve, the curve of quickest descent and quadrature of figures. He also considered curves of double curvature on the sphere and the quadrature of parts of a spherical surface. 2Astronomy The position of the moon or a planet when it is 90° from the sun as viewed from the earth. 〔天文〕方照；上弦；下弦 Example sentencesExamples The planet is at east quadrature (ninety degrees east of the Sun) on the 26th. When the Sun-Moon system is in quadrature relative to the Earth, the combined gravitational forces are not as strong. 3Electronics A phase difference of 90° between two waves of the same frequency, as in the color difference signals of a television screen. 〔电子〕转象差，九十度相位差 Example sentencesExamples A method and apparatus for equalizing a received quadrature amplitude modulated signal is disclosed. The L5 signal that will appear with the Block IIF satellites in 2006, will have quadrature phase skip keying. The quadrupolar echo pulse sequence was employed using quadrature detection with complete phase cycling of the pulse pairs. It features RS - 422-compatible quadrature output, and programmable resolution and output frequency. The MT312 is a single-chip variable rate digital quadrature phase shift keying satellite demodulator. Origin Mid 16th century (as a mathematical term): from Latin quadratura ‘a square, squaring’, from quadrare (see quadrate).
随便看	Erebus, Mount Erech Erechtheum erect erectable erectable erected erect hastily erectile erectile dysfunction erectility erecting erectings erection erection erections erective erectly erectly erectness erectness erectnesses erector erector erectors