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Showing papers on "Reciprocal published in 1991"


Proceedings ArticleDOI
26 Jun 1991
TL;DR: The author describes the design decisions made when designing integer division for a new 64-b machine, and proposes a fast and economical scheme for computing both unsigned and signed integer quotients which guarantees an exact answer without any correction.
Abstract: By using a reciprocal approximation, integer division can be synthesized from a multiply followed by a shift. Without carefully selecting the reciprocal, however, the quotient obtained often suffers from off-by-one errors, requiring a correction step. The author describes the design decisions made when designing integer division for a new 64-b machine. The result is a fast and economical scheme for computing both unsigned and signed integer quotients which guarantees an exact answer without any correction. The reciprocal computation is fast enough, with one table lookup and five multiplies, so that this scheme is competitive with a dedicated divider, while requiring much less hardware specific to division. The real strength of the proposed method is division by a constant, which takes only a single multiply and shift, one operation on the machine considered. The analysis shows that the computed quotient is always exact: no adjustment or correction is necessary. >

51 citations


Journal ArticleDOI
TL;DR: This paper argued that the intricacy of language suggests that it both creates and reflects women's roles in society, and that reciprocal accommodation may be the best way for women to achieve influential positions in man's world.
Abstract: Because the intricacy of language suggests that it both creates and reflects women's roles in society, reciprocal accommodation may be the best way for women to achieve influential positions in man...

18 citations


Journal ArticleDOI
TL;DR: In this paper, the smoothing problem for discrete-time Gaussian reciprocal processes is examined, and the smoother takes the form of a second-order two-point boundary-value nearest-neighbour model.
Abstract: The smoothing problem for discrete-time gaussian reciprocal processes is examined. For this class of process, the smoother takes the form of a second-order two-point boundary-value nearest-neighbour model. This smoother is non-causal, but admits causal implementations which extend the two-filter and Rauch-Tung-Striebel smoothing formulae of Gauss-Markov processes. A multi-rate implementation based on a block cyclic reduction method is also described.

16 citations




Journal ArticleDOI
TL;DR: In this paper, a pair of reciprocal formulas is established which can be regarded as a kind of multifold analogue of Gould-Hsu inversions, and its rotated forms are used to derive some series expansions.

7 citations


Journal ArticleDOI
TL;DR: In this article, the conservation properties of charges associated to unbroken and broken symmetries are discussed and the impossibility of establishing a conservation law for non-degenerate Hilbert space representations in the broken case leads to a reciprocal of Coleman's theorem.

6 citations


Journal ArticleDOI
TL;DR: In this article, the covariance of real Gaussian reciprocal processes is characterized and the set of such processes is split into three families that can be described by parametrization by the circle for a reciprocal process.

4 citations



Proceedings ArticleDOI
11 Jun 1991
TL;DR: In this paper, the relationship existing between the various scattering coefficients of a symmetrical reciprocal lossless six-port symmetric 6-port system has been derived from the ideal design specifications of zero mismatch, zero coupling between certain ports, and equal coupling amongst the other ports.
Abstract: The authors present the derivation of the relationships existing between the various scattering coefficients of a symmetrical reciprocal lossless six-port. Only small departures of the scattering-coefficient values from the ideal design specifications of zero mismatch, zero coupling between certain ports, and equal coupling amongst the other ports are considered. >

3 citations



Journal ArticleDOI
TL;DR: In this paper, the α-Al2O3(1120) surfaces were reconstructed in real and reciprocal spaces, and the reconstruction was carried out in real-and reciprocal spaces.



Journal ArticleDOI
TL;DR: In this article, a reciprocal relation is found between nonstationary solutions of the Einstein-Fokker-Planck equation describing the evolution of the probability density in the direct and reverse directions along the spatial coordinate.
Abstract: A reciprocal relation is found between nonstationary solutions of the Einstein-Fokker-Planck equation describing the evolution of the probability density in the direct and reverse directions along the spatial coordinate. Cases when the diffusion coefficient is constant or variable along the coordinate are separately considered.

Book ChapterDOI
01 Jan 1991
TL;DR: In this paper, it was shown that under suitable assumptions, one can characterize Gaussian second order reciprocal processes in terms of fourth order linear stochastic differential equations driven by locally correlated noise and with boundary value conditions.
Abstract: Continuous time second order reciprocal processes were introduced in 1979 by R. N. Miroshin [6]. A mean square differentiable process x(t) is second order reciprocal if the process constructed stacking in a vector x(t) and its mean square derivative x’(t) has the reciprocal property. In this paper we show that, under suitable assumptions, one can characterize Gaussian second order reciprocal processes in terms of fourth order linear stochastic differential equations driven by locally correlated noise and with boundary value conditions. Then, we use this characterization to repeat the classification of Gaussian, scalar, stationary second order reciprocal processes already done by Carmichael, Masse’ and Theodorescu [2].

01 Jan 1991
TL;DR: In this paper, Rizzi et al. claim that the ambiguity of (2a) receives an explanation in terms of the morphological complexity of the reciprocal expression each other.
Abstract: Sentence (2a) is ambiguous between broad and narrow scope interpretations. Thus, (2a) can either mean 'John thinks he looks like Mary, and Mary thinks that she looks like John' (the broad reading) or 'John and Mary think they (John and Mary) look like each other' (the narrow reading). In contrast, (2b) can only be construed with narrow scope. For HLMa the ambiguity of (2a) receives an explanation in terms of the morphological complexity of the reciprocal expression each other. Specifically, the quantificational distribution element each is adjoined to an antecedent, which is then subject to QR via the rule move -a at logical form (see May 1977, 1985). Put simply, this allows for different scope interpretations, depending on how far up the phrase marker each is moved. In contrast, the morphologically simplex alike contains no detachable distribution element, and, as a result, only the narrow scope reading is available. Of interest here is the fact that HLMa base their argument on the distinction between reciprocal meaning that is incorporated within a morphologically simplex versus a morphologically complex item. In support of this claim, they offer the following minimal pair of sentences from Italian (attributed to Luigi Rizzi):2