| 1. |
- Ahrenberg, Lars, 1948-, et al.
(författare)
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A Simple Hybrid Aligner for Generating Lexical Correspondences in Parallel Texts
- 1998
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Ingår i: <em>Proceedings of the 36th Annual Meeting of the Association for Computational Linguistics and 17th International Conference on Computational Linguistics (COLING-ACL'98) Montreal, August 10-14, 1998</em>. - Stroudsburg, PA, USA : The Association for Computational Linguistics. ; , s. 29-35
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Konferensbidrag (refereegranskat)
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| 2. |
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| 3. |
- Andersson, Angelica, et al.
(författare)
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Digital speckle-pattern interferometry: fringe retrieval for large in-plane deformations with digital speckle photography
- 1999
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Ingår i: Applied Optics. - : Optical Society of America. - 1559-128X .- 2155-3165. ; 38:25, s. 5408-5412
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Tidskriftsartikel (refereegranskat)abstract
- The compensation of large in-plane motions in digital speckle-pattern interferometry (DSPI) with the use of digital speckle photography (DSP) is demonstrated. Ordinary recordings of DSPI are recombined and analyzed with DSP. The DSP result is used to compensate for the bulk speckle motion prior to calculation of the phase map. This results in a high fringe contrast even for deformations of several speckle diameters. In addition, for the case of an in-plane deformation, it is shown that the absolute phase change in each pixel may be unwrapped by use of the DSP result as an initial guess. The principles of this method and experiments showing the in-plane rotation of a plate and the encounter of two rounded plates are presented
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| 4. |
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| 5. |
- Andersson, Mikael, et al.
(författare)
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Effect of bilayer phase transitions on vesicle structure and its influence on the kinetics of viologen reduction.
- 1995
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Ingår i: Journal of physical chemistry. - 0022-3654. ; 99:39, s. 14531-14538
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Vesicles were prepared from pure phosphatidylcholines (PC), phosphatidic acids (PA), or dioctadecyldimethylamonium bromide (DODAB). The aggregate structure was examined above and below the gel-to-liquid crystalline transition temperature (T-m) by means of cryo-transmission electron microscopy. The redox reaction between a membrane bound viologen and dithionite was studied in the different lipid systems. It was found that the presence of faceted vesicles or open bilayer fragments, below T-m, lead to double-exponential reduction kinetics.
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| 6. |
- Andersson, Michael K., et al.
(författare)
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Bootstrap testing for fractional integration
- 1998
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Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- Asymptotic tests for fractional integration, such as the Geweke-Porter-Hudak test, the modified rescaled range test and Lagrange multiplier type tests, exhibit size distortions in small samples. This paper investigates a parametric bootstrap testing procedure, for size correction, by means of a computer simulation study. The bootstrap provides a practical method to eliminate size distortions in the case of an asymptotic pivotal statistic while the power, in general, is close to the corresponding size adjusted asymptotic test. The results are very encouraging and suggest that a bootstrap testing procedure does correct for size distortions.
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| 7. |
- Andersson, Michael K., et al.
(författare)
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Power and bias of likelihood based inference in the cointegration model under fractional cointegration
- 1999
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Ingår i: Economics Letters. - : Elsevier. - 0165-1765. ; 65:2, s. 143-147
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- This paper investigates how fractional cointegration affects the common maximum likelihood cointegration procedure. It is shown that the likelihood ratio test of no cointegration has considerable power against fractional alternatives. In contrast to the case of a cointegrated system, the usual maximum likelihood estimator gives severely biased estimates of the long-run relation under fractional cointegration. This suggests that the standard likelihood approach should be used with caution and that a test to separate fractionally cointegrated series from series that are cointegrated of an integer order should be executed prior to estimation.
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| 8. |
- Andersson, Michael K., et al.
(författare)
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Robust testing for fractional integration using the bootstrap
- 1998
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Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- Asymptotic tests for fractional integration are usually badly sized in small samples, even for normally distributed processes. Furthermore, tests that are well-sized (under normality) may be seriously distorted by non-normalities and ARCH errors. This paper demonstrates how the bootstrap can be implemented to correct for such size distortions. It is shown that a well-designed bootstrap test based on the MRR and GPH tests is exact, and that a procedure based on the REG test is nearly exact. Ort, förlag, år, upplaga, sidor
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| 9. |
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| 10. |
- Andersson, Mikael
(författare)
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The asymptotic final size distribution of multitype chain-binomial epidemic processes.
- 1999
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Ingår i: Advances in Applied Probability. - 0001-8678. ; 31:1, s. 220-234
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Tidskriftsartikel (refereegranskat)abstract
- A multitype chain-binomial epidemic process is defined for a closed finite population by sampling a simple multidimensional counting process at certain points. The final size of the epidemic is then characterized, given the counting process, as the smallest root of a non-linear system of equations. By letting the population grow, this characterization is used, in combination with a branching process approximation and a weak convergence result for the counting process, to derive the asymptotic distribution of the final size. This is done for processes with an irreducible contact structure both when the initial infection increases at the same rate as the population and when it stays fixed.
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