| 释义 |
phased, ppl. a.|feɪzd|
[f. phase v. + -ed1.]
1. Synchronized; adjusted to be in phase.
1922Glazebrook Dict. Appl. Physics II. 936/2 If these two readings give zero reading, the transformers are correctly phased... If readings are obtained across EE′ and FF′ then polarity or phase rotation is incorrect. 1929Photoplay (Chicago) Apr. 31/2 Phased, or interlocked, all motors of sound and picture recording equipment lined up in readiness to start out in perfect step together. 1951S. Deutsch Theory & Design Television Receivers xiii. 435 When the sync pulse is near the center of the saw-tooth retrace, there can be no doubt that the picture is correctly phased with respect to the horizontal sweep. 1958Listener 9 Oct. 558/1 Zoning, road classification, phased traffic lights. 1969Focal Encycl. Film & Television Techniques 544/1 The associated synchronizing pulse trains are locked together and correctly phased. 1971Hi-Fi Sound Feb. 71/2 It can be difficult for the newcomer to hi-fi to know whether the loudspeakers are correctly phased or not.
b. phased array: an array of aerials that is made to transmit or receive at a variable angle by delaying the signals to or from each one by an amount depending on its position in relation to the others.
1938Television XI. 644/3 None of these changes..affect the description of the phased array. 1960Proc. IRE XLVIII. 1715 Phased arrays can provide scanning patterns and scanning rates which are impossible to attain with mechanically scanned antennas. 1966Electronics 3 Oct. 173 The satellite transponder will receive signals on 149.2 Mhz with an 8-element phased array. 1970New Scientist 10 Sept. 534/1 The beams formed by phased arrays can be steered electronically, and can be scanned up to several hundred million times a second.
2. Planned or carried out in stages or by degrees.
1949Archit. Rev. CV. 225/2 A phased building programme for all developments proposed for the accommodation of population and industry from London. 1953Manch. Guardian 12 May 1/3 Mr Dulles issued a statement that the United States Government favours a ‘phased’ withdrawal of British troops from the Canal Zone. 1956Sun (Baltimore) (B ed.) 30 Nov. 1/6 Lord Salisbury..declared: ‘Our policy is that of a phased withdrawal.’ This supposedly means a step by step withdrawal..rather than a quick overall pullout. 1967D. Wilson in Wills & Yearsley Handbk. Managem. Technol. iii. 49 The phased implementation of new procedures. 1972Daily Tel. 4 Mar. 32/6 A policy to end imprisonment without trial by a phased programme of releases of every detainee and internee. 1976Glasgow Herald 26 Nov. 3 The council who are planning 800 phased redundancies in the department next year. 1976Broadcast Dec. 1/1 There will have to be a phased introduction of any changes that are agreed in pay structures and conditions of service. |