| 释义 |
▪ I. multiplex, a. and n.|ˈmʌltɪplɛks|
† Pl. multiplices (Math.).
[a. L. multiplex, f. multus multi- + -plex = -fold.]
A. adj.
†1. Math.
a. multiplex to, multiplex of: that is some multiple of. Obs.
1570Billingsley Euclid v. 126 b, Multiplex is a greater magnitude in respect of the lesse, when the lesse measureth the greater. As the line CD..is multiplex to the lyne AB. 1651T. Rudd Euclide 185 How multiplex one magnitude is to one, so multiplex are all the magnitudes, to all. 1660Barrow Euclid vi. Prop. 1 The triangle ACH is as multiplex of the triangle ACB, as the base HC is of the base BC. 1690Leybourn Curs. Math. 211 Where AB 3 measureth CD 9, and therefore 9 is Multiplex to 3.
†b. multiplex proportion, multiple proportion.
1557Recorde Whetst. B iv b, There is one kinde of proportion, that is named multiplex, or manyfolde. 1609Dowland Ornith. Microl. 62 The Proportions, which make Musicall Consonances, are sixe..three in the Multiplex Kind,..3 in the super particular. 1709–29V. Mandey Syst. Math., Arith. 35 Proportion Multiplex, is the Habitude of a greater Number to a lesser, when the greater Number contains the lesser some times exactly. 1788T. Taylor Proclus I. 49 All the multiplex and super-particular proportions which they [sc. numbers] contain.
2. = manifold a. 1, 2; multiple a. 2, 3.
1676Grew Anat. Flowers ii. §21 The reason why the Figure of the Flower is more multiplex, than that of the Leaf. 1822T. L. Peacock Maid Marian i, The whole complex and multiplex detail of the noble science of dinner. 1837Carlyle Fr. Rev. (1872) III. i. viii. 54 Vehicles of all forms:..carriages, single, double and multiplex. 1838― Sart. Res. iii. x, Their raiment..is fastened together by a multiplex combination of buttons, thrums, and skewers. 1879Farrar St. Paul I. 10 Brief and scattered letters out of the multiplex correspondence of a varied life. 1886Pater Ess. fr. Guardian (1896) 25 So multiplex is the result that minds of quite opposite type might well discover in these pages their own special thought or humour.
3. In technical use. (Cf. multiple a. 3.)
a. Bot. Having many parts of the same kind together. Of a corolla: Having petals lying over each other in folds. b. Electr. = multiple a. 3 f. More widely in Telecommunications, applied to processes and equipment for transmitting two or more independent signals or programmes (to be later separated and recovered) simultaneously over a single wire or channel, and to a composite signal so formed. c. Philos. = multiple a. 3 i. d. Path. = multiple a. 3 d.
a.1819Pantologia s.v., Multiplex Corol. 1856Henslow Dict. Bot. Terms 111 Multiplex, where many of the same parts or organs occur together.
b.1873M. Gally Brit. Pat. 1395 17 Apr. 13 My Invention has particular reference to ‘multiplex telegraphy’, or the employment of a number of operators sending without conflict a number of different messages upon a single wire. 1883Jrnl. Franklin Inst. CXVI. 479 In the multiplex [system], as I myself have seen, an instantaneous change in the resistance of the line equal to five hundred miles, may be made without practically affecting the synchronous movement of the distributors. 1886Rep. Brit. Ass. 812 Multiplex Telegraphy. By W. H. Preece, F.R.S. 1895–6Cal. Univ. Nebraska 102 Telegraphy and Telephony. Single, duplex, quadruplex, and multiplex systems. 1934[see coaxial a. 2 c]. 1962A. Nisbett Technique Sound Studio 261 Multiplex radio transmissions and the single groove of a stereo disc each contain more than one channel. 1970J. Earl Tuners & Amplifiers ii. 47 Multiplex signal..consists of 19kHz pilot-tone, the A + B mono information and sidebands of the A - B stereo information (the..subcarrier..having been suppressed at the transmitter). 1973Mod. Railways Jan. 12/2 Interlockings within three or four miles of Bristol are operated by individual circuits... Beyond this distance electronic time division multiplex equipment is used.
c.1838tr. Kant's Crit. Pure Reason Explan. Terms 648 Diverse, Multifarious, Multiplex, Various, (Mannichfaltig).
d.1899Allbutt's Syst. Med. VIII. 895 Eyelid xanthoma differs essentially in structure from the multiplex variety.
B. n.
†1. Math. = multiple n. 2. Obs.
1570Billingsley Euclid v. 132 For the multiplex of 3..ye shall haue 18. 1651T. Rudd Euclide 183 When equimultiplices being taken, the multiplex of the first exceedeth the multiplex of the second..then [etc.]. Ibid. 195 Like parts of multiplices..have one and the same proportion. 1695W. Alingham Geom. Epit. 61 The double, treble, (or any other Multiplex..) of two quantities are in the same reason as the Quantities themselves.
2. In the Kantian philosophy: = manifold n. 2 a.
1836J. W. Semple Kant's Metaphysic of Ethic Introd. p. li. note, Even Space and Time, though singulars a priori, do, so far forth as they consist of partes extra partes, exhibit a multiplex.
3. Electr. A multiplex system or signal.
1959J. W. Freebody Telegr. ii. 50/2 This printer was used in connexion with the Murray multiplex. 1967Technology Week 20 Feb. 4/2 Initial experiments with time-division multiplex have convinced Comsat Corp. that satellite transmission does not produce insuperable synchronization problems. 1970Toronto Daily Star 24 Sept. 26/1 (Advt.), It..tapes for multiplex and even makes ‘sound with sound’ recordings. 1973Hills & Evans Telecommunications Syst. Design I. iv. 92 Modern equipment has group and supergroup limiters applied to the signal prior to their assembly into the higher multiplex.
▪ II. multiplex, v.|ˈmʌltɪplɛks|
[f. the n.]
trans. To incorporate into a multiplex signal or system.
1925C. A. Wright Telephone Communication xiii. 317 The terminal equipment required to multiplex a telephone line is costly and its use is, consequently, justified only with long lines. 1955Sci. News Let. 5 Mar. 158/2 You may soon be able to hear programs from your local FM station—minus commercials—in buses..and on the job. This is just one of the possibilities of a system being considered..that would allow FM stations to ‘multiplex’ their broadcasts. In the process, two separate signals would be sent from the same tower using the same radio frequencies. 1966McGraw-Hill Encycl. Sci. & Technol. V. 352/2 When communication channels are multiplexed by time division, a number of messages is propagated over a common transmitting medium by allocating different time intervals in sequence for the transmission of each message. 1969Sci. Jrnl. Dec. 42/3 A colour TV system multiplexes (by frequency division) video, colour and sound information. 1972Sci. Amer. Sept. 120/3 The T1 carrier of the Bell Telephone System, which multiplexes 24 speech signals, is a typical example of a pulse-code-modulation (PCM) system.
Hence ˈmultiplexed ppl. a.; ˈmultiplexing vbl. n. Also ˈmultiplexer, -or, a device which multiplexes.
1955Sci. News Let. 5 Mar. 158/3 Multiplexing is only practical on FM broadcasts because at present there are too many technical difficulties in splitting up AM programs. 1957Electronic Engin. XXIX. 159/1 The information received from, say, two channels of the multiplexor are admitted serially to the clamping circuit. 1964Ann. N.Y. Acad. Sci. CXV. 574 Multiplexers can be sequential sampling devices, or electronic commutators, which sample each channel in turn cyclically. 1969Sci. Jrnl. Dec. 42 This spacing of the different signals over adjacent frequency ranges of the communication channel is called frequency-division multiplexing. Ibid. (caption) Frequency spectrum of a frequency division multiplexed channel shows how..five carriers..are each surrounded by sidebands. 1970O. Dopping Computers & Data Processing viii. 121 A multiplexor channel has its own facilities for sharing its time between different slow input/output operations. 1973Physics Bull. July 413/3 A multiplexed hologram is produced from the sequence of exposures on the cine film. |