| 释义 |
quantization|kwɒntaɪˈzeɪʃən|
[f. next + -ation.]
The action of quantizing; the fact or state of being quantized. a. Physics. Cf. quantize v. 1.
1922Rep. Brit. Assoc. Adv. Sci. 1921 473 In some cases..the quantisation can be done in several ways and each leads to a different set of permissible orbits, but the energy of each has the same set of values and so they give the same spectrum. 1922Proc. Cambr. Philos. Soc. XXI. 80 (heading) A general condition for the quantisation of the conditionally periodic motions with an application for the Bohr atom. 1925Nature 5 Dec. 849/1 It seemed possible to formulate certain general laws, the so-called rules of ‘quantisation’, by means of which the stationary states were to be chosen from the continuous manifold of such motions. 1940Glasstone Text-bk. Physical Chem. i. 63 The existence of 2j + 1 magnetic quantum numbers for each value of j implies that the electrons can take up 2j + 1 different orientations in a magnetic field..: in other words, there should be a quantization of electron orbits. 1975Physics Bull. July 311/1 To see the departure of the specific heat of solids from the classical Dulong Petit law due to quantization of lattice vibration energies we often need to go to temperatures of the order of 100 K.
b. Telecommunications. Cf. quantize v. 2. Usu. attrib., as quantization distortion, quantization level, quantization noise.
1947Bell Syst. Techn. Jrnl. XXVI. 395 PCM involves the application of two basic concepts. These concepts are..the time-division principle and the amplitude quantization principle. 1948Proc. IRE XXXVI. 1324/2 Representing the signal by certain discrete allowed levels only is called quantizing. It inherently introduces an initial error in the magnitude of the samples, giving rise to quantization noise. 1951Ibid. XXXIX. 44 (heading) Quantization distortion in pulse-count modulation with nonuniform spacing of levels. 1953A. T. Starr Radio & Radar Technique i. 32 Quantization could be used with any known system of modulation, e.g. the signal wave could be quantized and then used to modulate the amplitude or frequency of a carrier. 1975D. G. Fink Electronics Engineers' Handbk. iv. 44 A quantization noise..is inevitably associated with all quantized signals. This noise can be made as small as desired by choosing enough quantization levels or, equivalently, making each quantization level small enough. |