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ACL
2010
15 years 4 months ago
Viterbi Training for PCFGs: Hardness Results and Competitiveness of Uniform Initialization
We consider the search for a maximum likelihood assignment of hidden derivations and grammar weights for a probabilistic context-free grammar, the problem approximately solved by ...
Shay B. Cohen, Noah A. Smith
ICIP
2010
IEEE
15 years 4 months ago
Gradient projection for linearly constrained convex optimization in sparse signal recovery
The 2- 1 compressed sensing minimization problem can be solved efficiently by gradient projection. In imaging applications, the signal of interest corresponds to nonnegative pixel...
Zachary T. Harmany, Daniel Thompson, Rebecca Wille...
SICHERHEIT
2010
15 years 4 months ago
CAPTCHAs: The Good, the Bad, and the Ugly
A CAPTCHA is a program that generates challenges that are easy to solve for humans but difficult to solve for computers. The most common CAPTCHAs today are text-based ones where a ...
Paul Baecher, Marc Fischlin, Lior Gordon, Robert L...
CAI
2010
Springer
15 years 4 months ago
Constrained Longest Common Subsequence Computing Algorithms in Practice
The problem of finding a constrained longest common subsequence (CLCS) for the sequences A and B with respect to the sequence P was introduced recently. Its goal is to find a longe...
Sebastian Deorowicz, J. Obstoj
CMA
2010
155views more  CMA 2010»
15 years 4 months ago
Approximate solutions to a parameterized sixth order boundary value problem
In this paper, the homotopy analysis method (HAM) is applied to solve a parameterized sixth order boundary value problem which, for large parameter values, cannot be solved by oth...
Songxin Liang, David J. Jeffrey