| 单词 |
phase sequence |
| 释义 |
phase sequence
[f. phase n. + sequence.]
1. Electr. Engin. The sequence in which the different lines of a polyphase system attain their maximum voltage.
1918K. Edgcumbe Industr. Electr. Measuring Instruments (ed. 2) 257 A simple method of determining phase sequence when a rotation indicator is not available has been described. 1971A. Symonds Electr. Power Equipment vi. 91 There are three essential conditions to be met before two transformers can be connected in parallel: (a) Secondaries must have the same phase sequence. This can be checked by a phase-sequence indicator.
2. Psychol. A hypothetical sequence of cellular activity in the brain initiated by a sensory stimulus, suggested by D. O. Hebb as an explanation of motivated behaviour.
1946D. O. Hebb in Psychol. Rev. LIII. 269/1 Let us designate the specific pattern of cellular activity throughout the thalamo-cortical system, at any one moment, as a ‘phase’. Behavior is directly correlated with a phase sequence which is temporally organized. 1954Brit. Jrnl. Psychol. XLV. 189 Hebb (1949) expresses the belief that the mental processes corresponding to cortical processes (‘phase-sequences’) will be most rewarding..when the phase-sequences are in the course of being built up. 1964Cofer & Appley Motivation viii. 407 The theory presented..was essentially..that nerve cells in the brain when more or less simultaneously excited constitute assemblies of mutually facilitating, and to some extent stimulating, elements, a series of such cell assemblages acting one after another constitute a ‘phase sequence’. 1970C. Taylor in Borger & Cioffi Explanation in Behavioural Sci. 77 Hebb..presents mechanisms, the ‘cell assembly’ and ‘phase sequence’, which although expressed in neurological terms are not based on any direct supporting neurological evidence. |
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