| 释义 |
aperiodic, a.|ˌeɪpɪərɪˈɒdɪk|
[f. Gr. ἀ- priv. (a- prefix 14) + periodic a.1]
Not periodic; without regular recurrence. In various techn. senses (see quots.); spec. of a galvanometer, without periodic vibrations, ‘dead-beat’.
1879Encycl. Brit. X. 50/2 An intermediate stage called the aperiodic state. 1884Krohn tr. Glaser de Cew's Magn.- & Dyn.-Electr. Mach. 228 The commutator am-meter is an aperiodic galvanometer. 1894W. L. Dallas in Indian Meteorol. Mem. VI. 2 The annual periodic changes and the aperiodic changes [are] both very slight. 1930Engineering 31 Jan. 129/3 Another new instrument shown was an aperiodic balance, in which air damping is provided in order to bring the beam to rest rapidly. 1943Gloss. Terms Telecomm. (B.S.I.) 68 Aperiodic aerial, an aerial designed to operate over a substantial range of frequencies. 1952E. Hyams Soil & Civilization i. 7 The man's motions abrupt, aperiodic and angular. |