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» Isotopy of Polygonal Domains for Generalized Polygons
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KDD
2006
ACM
163views Data Mining» more  KDD 2006»
14 years 6 months ago
New EM derived from Kullback-Leibler divergence
We introduce a new EM framework in which it is possible not only to optimize the model parameters but also the number of model components. A key feature of our approach is that we...
Longin Jan Latecki, Marc Sobel, Rolf Lakämper
SSD
1993
Springer
152views Database» more  SSD 1993»
13 years 10 months ago
Realms: A Foundation for Spatial Data Types in Database Systems
: Spatial data types or algebras for database systems should (i) be fully general (which means, closed under set operations, hence e.g. a region value can be a set of polygons with...
Ralf Hartmut Güting, Markus Schneider
DAGSTUHL
2004
13 years 7 months ago
Optimal Approximation of Elliptic Problems by Linear and Nonlinear Mappings
We study the optimal approximation of the solution of an operator equation A(u) = f by four types of mappings: a) linear mappings of rank n; b) n-term approximation with respect t...
Erich Novak, Stephan Dahlke, Winfried Sickel
VIS
2009
IEEE
238views Visualization» more  VIS 2009»
14 years 7 months ago
An Interactive Visualization Tool for Multi-channel Confocal Microscopy Data in Neurobiology Research
Confocal microscopy is widely used in neurobiology for studying the three-dimensional structure of the nervous system. Confocal image data are often multi-channel, with each channe...
Yong Wan, Hideo Otsuna, Chi-Bin Chien, Charles ...
PR
1998
90views more  PR 1998»
13 years 5 months ago
Supportedness and tameness differentialless geometry of plane curves
—We introduce a class of planar arcs and curves, called tame arcs, which is general enough to describe (parts of) the boundaries of planar real objects. A tame arc can have smoot...
Longin Jan Latecki, Azriel Rosenfeld