Báo cáo toán học: "A finite calculus approach to Ehrhart polynomials" ppsx

... leading term has period 1 coefficient. the electronic journal of combinatorics 17 (2010), #R68 5 A finite calculus approach to Ehrhart polynomials Steven V. Sam Department of Mathematics Massachusetts ... volume computation. Let us return to our polytope t∆ d ⊆ R d and compute its Ehrhart polynomial. For this example, our inductive approach to computing volume works out well...

Ngày tải lên: 08/08/2014, 12:22

... APPROACH TO GOLOMB’S RECURSION Edward J. Barbeau, John Chew and Stephen Tanny Department of Mathematics University of Toronto Toronto, ON M5S 3G3 barbeau@math.utoronto.ca, jjchew@math.utoronto.ca and ... that a similar approach will lead to a solution to (1) which is not eventually increasing. 4. Concluding remarks The matrix dynamics approach described in Section 2 can be applied...

Ngày tải lên: 07/08/2014, 06:20

... basic properties of this infinite poset: it contains no infinite antichain (Higman, 1952, [9]). An excellent introduction to this topic is due to M. Lothaire [13]. In this paper we study the finite version of ... good introduction to the latter problem is [7]. As we already mentioned, combinatorics on words has been almost exclusively concerned with the infinite poset P (∞) , comprising...

Ngày tải lên: 07/08/2014, 06:23

... λ  , r = w u , z, s = w v , z. the electronic journal of combinatorics 18 (2011), #P172 7 which may be factorized into the following two cubic equations: ν 3 −  λ I − δ u λ I  ν 2 −(δ u + ... express y(1) = L −1 2 L 1 (λ I ). As before, Lemma 3.2 applied to case (b) completes the proof.  7 Asymptotic behavior It is illustrative to compare the bounds obtained in the three above the...

Ngày tải lên: 08/08/2014, 14:23

... converted to dependency trees us- ing Stanford Parser (Marneffe et al., 2006). We con- vert the tokens in training data to lower case, and re-tokenize the sentences using the same tokenizer from ... sensitive to parser er- rors; on the other hand, integrated model is forced to use a longer distortion limit which leads to more search errors during decoding time. It is possible to 9...

Ngày tải lên: 19/02/2014, 19:20

... differences hold to a lesser degree when a partial dictionary is provided. With MLHMM, different tokens of the same word type are usually assigned to the same cluster, but types are assigned to clusters ... HHTHHHTHHH (a) (b) Figure 1: The Bayesian approach to estimating the value of a latent variable, t, from observed data, w, chooses a value of t robust to uncertainty in θ. (a)...

Ngày tải lên: 20/02/2014, 12:20

... order to achieve statistical signifi- cance. Performance over a validation set was al- ways worse with larger history sizes than 1. 5 Conclusions We have described work towards an approach to ... is to enable the quality and nature of discussions that occur within an on-line discussion board to be communicated in a summary to a potential new- comer or group moderators. We pr...

Ngày tải lên: 20/02/2014, 12:20

... sampling (Gelman et al., 2004) to approximate the posterior distribution of the hid- den variables in our model. To apply Gibbs sam- pling to our problem, we need to derive the condi- tional posterior ... the future, we plan to explore phonological context and use more flexible topological structures to model acoustic units within our framework. Acknowledgements The authors would l...

Ngày tải lên: 07/03/2014, 18:20

... first step, 8 anno- tators were asked to select words to be removed to compress the sentences. In the second step, 6 an- notators (different from the first step) were asked to pick the best one ... incomplete words since they tend to appear to- gether with disfluencies and thus provide useful in- formation for compression. 3 Sentence Compression Approach Our compression approach...

Ngày tải lên: 07/03/2014, 18:20

... alternative to these tree trimming approaches, sequence-oriented approaches have been proposed (McDonald, 2006; Nomoto, 2007; Hori and Furui, 2003; Clarke and Lapata, 2006). Nomoto (2007) and ... Syntax-Free Approach to Japanese Sentence Compression Tsutomu HIRAO, Jun SUZUKI and Hideki ISOZAKI NTT Communication Science Laboratories, NTT Corp. 2-4 Hikaridai, Seika-cho, Soraku-gun, Kyoto...

Ngày tải lên: 08/03/2014, 00:20