منابع مشابه
Efficient Off-line and On-line Algorithms for Training Conditional Random Fields by Approximating Jacobians
Previously, algorithms for training conditional random fields were derived from the second-order Taylor expansion of the log-likelihood of the training data and the key issue is to approximate the Hessian matrix, which usually requires O(n) computations per iteration. In this paper, we show that efficient off-line and online algorithms for training conditional random fields (CRF) can also be de...
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Approximating I#PART = ́ 1 0 ∏ n k=1 cos (xkπt) dt to within an accuracy of 2 −n where the input integers {xk} n k=1 are given in binary radix, is equivalent to counting the number of equal-sum partitions of the integers {xk} and is thus a #P problem. Similarly, integrating this function from zero to infinity and deciding whether the result is either zero or infinity is an NP-Complete problem. E...
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This is a second paper where we introduce deformation theory methods which can be applied to finding curves in families of principally polarized abelian varieties (ppav) containing jacobians. One of our motivations for finding interesting and computationally tractable curves in ppav is to solve the Hodge conjecture for the primitive cohomology of the theta divisor which we explain below. For ot...
متن کاملA bidirectional regulation between the TR2/TR4 orphan receptors (TR2/TR4) and the ciliary neurotrophic factor (CNTF) signaling pathway.
Previously, we reported that the nuclear orphan receptor TR4 could induce transcriptional activity via the 5th intron of the ciliary neurotrophic factor (CNTF) alpha receptor gene (CNTFR-I5). Here we show CNTF could increase TR4 expression and enhance the DNA-binding capacity of TR4. Interestingly, the expression of TR2, a close family member of TR4, could also be induced by CNTF. In return, TR...
متن کاملJacobians among Abelian Threefolds: a Formula of Klein and a Question of Serre
Let k be a field and f be a Siegel modular form of weight h ≥ 0 and genus g > 1 over k. Using f , we define an invariant of the k-isomorphism class of a principally polarized abelian variety (A, a)/k of dimension g. Moreover when (A, a) is the Jacobian of a smooth plane curve, we show how to associate to f a classical plane invariant. As straightforward consequences of these constructions when ...
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ژورنال
عنوان ژورنال: PAMM
سال: 2005
ISSN: 1617-7061,1617-7061
DOI: 10.1002/pamm.200510370