“band”的概念、定义、翻译、参考文献-科学参考

band

Astronomy

A broad absorption feature in a spectrum due to molecules or very closely spaced absorption lines of a single element; for example the b band in the Sun’s spectrum, which is due to many lines of magnesium.

Computer

1. A set of adjacent tracks on a magnetic or optical disk.
2. A section of the frequency spectrum lying between limits that are defined according to some requirement or to some functional aspect of a given signal or transmission channel. When used as a suffix the word is a contraction of bandwidth, as in narrowband, wideband.

Electronics and Electrical Engineering

1. A specific range of frequencies used in communications for a definite purpose, such as the longwave band in radio; certain frequencies within the band are assigned to different transmitting stations and the receiver may be tuned to any desired frequency within the band. See also frequency band.
2. A closely spaced group of atomic energy levels. See energy bands.
3. A closely spaced group of molecular energy levels that appear as fluted bands separated by dark spaces in the spectra of compounds. Under higher resolution the bands resolve into fine spectral lines.

Geology and Earth Sciences

In remote sensing, the range of wavelengths which are examined.

单词	band
释义	band Astronomy A broad absorption feature in a spectrum due to molecules or very closely spaced absorption lines of a single element; for example the b band in the Sun’s spectrum, which is due to many lines of magnesium. Computer 1. A set of adjacent tracks on a magnetic or optical disk. 2. A section of the frequency spectrum lying between limits that are defined according to some requirement or to some functional aspect of a given signal or transmission channel. When used as a suffix the word is a contraction of bandwidth, as in narrowband, wideband. Electronics and Electrical Engineering 1. A specific range of frequencies used in communications for a definite purpose, such as the longwave band in radio; certain frequencies within the band are assigned to different transmitting stations and the receiver may be tuned to any desired frequency within the band. See also frequency band. 2. A closely spaced group of atomic energy levels. See energy bands. 3. A closely spaced group of molecular energy levels that appear as fluted bands separated by dark spaces in the spectra of compounds. Under higher resolution the bands resolve into fine spectral lines. Geology and Earth Sciences In remote sensing, the range of wavelengths which are examined.
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