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duplex 音标拼音: [d'upl,ɛks] 双工,双工的,双向的 双工,双工的,双向的 duplex 双工; 双面列印 duplex 半双工的 duplex 部分全双工 duplex 全双工服务 duplex 半双工服务 duplex 不对称半双工 duplex 双工 duplex adj 1: (used technically of a device or process) having two parts; "a duplex transaction" 2: allowing communication in opposite directions simultaneously; "duplex system"; "duplex telephony" n 1: a house with two units sharing a common wall [synonym: {duplex house}, {duplex}, {semidetached house}] 2: an apartment having rooms on two floors that are connected by a staircase [synonym: {duplex apartment}, {duplex}] v 1: change into a duplex Duplex \Du"plex\, a. [L., fr. duo two plicare to fold. See {Two}, and {Complex}.] 1. Double; twofold. [1913 Webster] 2. (Computers) organized so that data may be transmitted in two opposite directions over the same channel; -- of communications channels, such as data transfer lines between computers. [PJC] {Duplex escapement}, a peculiar kind of watch escapement, in which the scape-wheel has two sets of teeth. See {Escapement}. {Duplex lathe}, one for turning off, screwing, and surfacing, by means of two cutting tools, on opposite sides of the piece operated upon. {Duplex pumping engine}, a steam pump in which two steam cylinders are placed side by side, one operating the valves of the other. {Duplex querela} [L., double complaint] (Eccl. Law), a complaint in the nature of an appeal from the ordinary to his immediate superior, as from a bishop to an archbishop. --Mozley & W. {Duplex telegraphy}, a system of telegraphy for sending two messages over the same wire simultaneously. {Duplex watch}, one with a duplex escapement. {half duplex} (Computers) (a) arranged so that the information may be transmitted in both directions, but only in one direction at a time; -- of communications channels between computers; contrasted with {full duplex(a)}. (b) arranged so that the information transmitted to the remote computer also appears on the local terminal; -- of communications channels between computers; contrasted with {full duplex(b)}. {full duplex}, (Computers) (a) arranged so that the information may be transmitted in both directions simultaneously; -- of communications channels between computers; contrasted with {half duplex(a)}. (b) arranged so that the information transmitted to the remote computer does not appear on the local terminal; -- of communications channels between computers; contrasted with {half duplex(b)}. [1913 Webster] Duplex \Du"plex\, v. t. [See {Duplex}, a.] (Teleg.) To arrange, as a telegraph line, so that two messages may be transmitted simultaneously; to equip with a duplex telegraphic outfit. [Webster 1913 Suppl.] duplex \du"plex\, n. [See {Duplex}, a.] 1. something which is duplex; -- used mostly in reference to a living unit, such as an apartment, in a building having two similar living units. [PJC] 2. (Biology, Genetics) a double-stranded region in a nucleic acid molecule. See {deoxyribonucleic acid}. [PJC] 49 Moby Thesaurus words for "duplex": Janus-like, ambidextrous, apartment house, bifacial, bifold, biform, bifurcated, bilateral, binary, binate, biparous, bipartisan, bipartite, bivalent, condominium, conduplicate, cooperative apartment house, dichotomous, disomatous, double, double-barreled, double-faced, duadic, dual, dualistic, duple, duplex house, duplicate, duplicated, dyadic, flats, geminate, geminated, high-rise apartment building, identical, matched, second, secondary, tenement, twain, twin, twinned, two, two-faced, two-level, two-ply, two-sided, two-story, twofold that can carry signals in both directions, in contrast to a {simplex} channel which only ever carries a signal in one direction. If signals can only flow in one direction at a time the communications is "{half-duplex}", like a single-lane road with traffic lights at each end. Walkie-talkies with a "press-to-talk" button provide half-duplex communications. If signals can flow in both directions simultaneously the communications is "{full-duplex}", like a normal two-lane road. Telephones provide full-duplex communications. The term "duplex" was first used in wireless, telegraph, and telephone communications. Nearly all communications circuits used by computers are two-way, so the term is seldom used. {(http://cit.ac.nz/smac/dc100www/dc_014.htm)}. (2001-07-21)
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