| 释义 |
off-line, a. and adv.
(stress variable)
[f. off prep. + line n.2]
A. adj.
1. Not situated or performed on a railway or by rail.
1926Huebner & Johnson Railroad Freight Service xvii. 338 Many railroads maintain ‘off-line’ offices or agencies at important industrial and commercial centers which they reach via connecting lines. 1973E. Rath Container Systems vii. 175 Bimodal containerization uses truck trailers or other highway vehicles or special containers... This service uses the rail network as the main artery and as prime source of railroad revenue. The off-line service is given as an accommodation to the freight market. 1973Sci. Amer. Oct. 24/3 The achievement is made possible by off-line loading and automatic, positive control of all motions of the vehicle.
2. Computers. Not on-line; other than on-line.
1950W. W. Stifler High-Speed Computing Devices ii. 7 For other applications, off-line operation, involving automatic transcription of data in a form suitable for later introduction to the machine, may be tolerated. 1957D. D. McCracken Digital Computer Programming xii. 157 The reel of tape may then be removed from the auxiliary (‘off-line’) tape unit, placed on a tape unit which is connected to the computer (‘on-line’), and read in at high speeds. 1959[see in-line a. 3 c]. 1967C. Berners-Lee in Wills & Yearsley Handbk. Managem. Technol. 16 Off-line equipment is, typically, a keyboard device preparing a paper tape to be read into a computer later. An on-line keyboard, on the other hand, is one wired directly into the computer. 1969Sunday Times (Colour Suppl.) 16 Feb. 22/3 The clearance and updating must be done when the computer is..‘off-line’, i.e. is uncoupled from any systems that the computer itself is controlling. 1972Accountant 26 Oct. 530/2 Off-line operation at Hendon is through a Varian 6201 computer and dual tape unit, transferring data to tape for processing later on the 370/145.
B. adv. Computers. With a delay between the production of data and its processing; not under direct computer control.
1950W. W. Stifler High-Speed Computing Devices ii. 7 Some teletype machines operate on line. Their operators are in instantaneous communication. Other teletype machines are operated off line, through the intervention of punched paper tape. 1959J. K. Brigden in E. M. Grabbe et al. Handbk. Automation, Computation, & Control II. xx. 4 Obviously all the equipment used for on-line purposes can also be used off-line. 1964T. W. McRae Impact of Computers on Accounting i. 17 The tape is then..transferred to a smaller computer and printed off-line on the output printer of that computer. 1967D. Wilson in Wills & Yearsley Handbk. Managem. Technol. 43 Because removable media systems can store inactive data off-line, the total capacity of these systems..is virtually unlimited. 1970Computers & Humanities V. 36 Although the plotter, when run ‘off line’, is relatively cheap, it is slow. 1971Sci. Amer. Sept. 17/1 (Advt.), Until recently, the best solution was to use the complex mathematics of the Fourier transform and program a computer to do the complex signal analysis computations off-line. |