5356 search results - page 220 / 1072 » Adventures in time and space |
138
click to vote
SIAMNUM
2010
15 years 1 months ago
2010
In this paper, we propose a uniaxial perfectly matched layer (PML) method for solving the time-harmonic scattering problems in two-layered media. The exterior region of the scatter...
174
Voted
FOCS
2006
IEEE
16 years 20 days ago
2006
IEEE
Given an n-element set U and a family of subsets S ⊆ 2U we show how to count the number of k-partitions S1 ∪ · · · ∪ Sk = U into subsets Si ∈ S in time 2nnO(1). The only...
188
click to vote
TIP
2010
15 years 1 months ago
2010
We propose algorithms for tracking the boundary contour of a deforming object from an image sequence, when the nonaffine (local) deformation over consecutive frames is large and th...
180
click to vote
SIGMOD
2003
ACM
16 years 6 months ago
2003
ACM
A query optimizer compares alternative plans in its search space to find the best plan for a given query. Depending on the search space and the enumeration algorithm, optimizers v...
205
click to vote
BIRTHDAY
2010
Springer
15 years 7 months ago
2010
Springer
The question of whether there is a logic that captures polynomial time was formulated by Yuri Gurevich in 1988. It is still wide open and regarded as one of the main open problems...