| 释义 |
remanence|ˈrɛmənəns|
[ad. L. type *remanentia: see remanent a. and -ence.]
1. That which remains; residuum. rare.
1666Boyle Orig. Formes & Qual. 255 To judge of and employ the Remanence of the Amber, after the Distillation is finish'd. c1691― Wks. III. 81 (R.), This salt..requires no strong heat to make it sublime into finely figured crystals without a remanence at the bottom. 1893Sloane Stand. Electr. Dict., Remanence, the residual magnetism left after magnetic induction, expressed in lines of force per square centimeter.
2. The fact of remaining; permanence.
1810Coleridge in Lit. Rem. (1838) III. 318 Neither St. Augustine nor Calvin denied the remanence of the will in the fallen spirit. 1964J. Stacey John Wyclif & Reform v. 104 The next assertion was a doctrine of Remanence. If annihilation was denied then, in his view, the bread and wine remained bread and wine. 1964R. H. Bainton Hist. Christianity viii. 238/1 This was not to say..that Christ is not in the sacrament. He is there, in addition to and along with bread and wine, whose substance remains. This doctrine is called remanence. 1974Encycl. Brit. Macropædia XIX. 1051/1 He [sc. Wycliffe] sought to replace it [sc. the doctrine of transubstantiation] with a doctrine of remanence (remaining).
3. Physics. Residual magnetism, spec. retentivity 1 (but see quot. 1962).
1917G. D. Shepardson Telephone Apparatus iv. 279 When the current has been reduced to zero, there still exists a more or less permanent magnetization such as indicated by OE, the power of holding this residual magnetization being sometimes called the ‘remanence’ of the iron, sometimes expressed as a percentage of the maximum magnetization. 1924C. R. Underhill Magnets xxv. 435 The remanence is the structural flux density of a permanent magnet, sometimes called the residual induction. 1947Electronic Engin. XIX. 379/1 The wire originally used.. was a medium carbon steel having a remanence of 6,000/7,000 gauss. 1948[see retentivity 1]. 1962M. McCaig in D. Hadfield Permanent Magnets & Magnetism ii. 26 The hysteresis loop of largest area is known as the hysteresis loop. The values of remanent magnetism..and coercive force..for this hysteresis loop are known as the remanence and coercivity respectively. This definition of remanence conforms with the usage recommended by the British Standards Institution... In the U.S.A...the same quantity is called residual magnetism, while the word remanence is used to describe the state of an actual magnet after magnetization. Owing to its own self-demagnetizing field such a magnet operates at a point in the top left-hand quadrant of the hysteresis loop. As the British Standard refers to the flux density in such a magnet as ‘residual magnetism’ there is a complete interchange of meanings of the terms ‘remanence’ and ‘residual magnetism’ on the two sides of the Atlantic. 1973J. G. Tweeddale Materials Technol. I. iv. 93 When an electromagnetically induced field is changing rapidly, as it might do in a piece of electrical or electronic equipment, it is obvious that a very low remanence is desirable if energy loss and generation of heat is to be avoided. 1976Nature 5 Feb. 381/1 Many of the intrusions have been sampled during our new study and the palaeomagnetism of those possessing stable remanences after a[lternating] f[ield] cleaning is reported here.
So † ˈremanency. Obs.
1647Jer. Taylor Lib. Proph. ii. 22 No salvation was consistent with the actuall remanency of that error. 1656― Answ. to Bp. of Rochester 20 The remanency of concupiscence or Original Sin in the Regenerate. |