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ICANN
2010
Springer
14 years 10 months ago
Visualising Clusters in Self-Organising Maps with Minimum Spanning Trees
Abstract. The Self-Organising Map (SOM) is a well-known neuralnetwork model that has successfully been used as a data analysis tool in many different domains. The SOM provides a to...
Rudolf Mayer, Andreas Rauber
IPL
2010
71views more  IPL 2010»
14 years 8 months ago
New common ancestor problems in trees and directed acyclic graphs
We derive a new generalization of lowest common ancestors (LCAs) in dags, called the lowest single common ancestor (LSCA). We show how to preprocess a static dag in linear time su...
Johannes Fischer, Daniel H. Huson
ASPDAC
2005
ACM
158views Hardware» more  ASPDAC 2005»
14 years 11 months ago
The polygonal contraction heuristic for rectilinear Steiner tree construction
— Motivated by VLSI/ULSI routing applications, we present a heuristic for rectilinear Steiner minimal tree (RSMT) construction. We transform a rectilinear minimum spanning tree (...
Yin Wang, Xianlong Hong, Tong Jing, Yang Yang, Xia...
EMNLP
2004
14 years 11 months ago
Dependencies vs. Constituents for Tree-Based Alignment
Given a parallel parsed corpus, statistical treeto-tree alignment attempts to match nodes in the syntactic trees for a given sentence in two languages. We train a probabilistic tr...
Daniel Gildea
SIAMCOMP
2000
99views more  SIAMCOMP 2000»
14 years 9 months ago
Squarish k-d Trees
We modify the k-d tree on [0, 1]d by always cutting the longest edge instead of rotating through the coordinates. This modification makes the expected time behavior of lowerdimensi...
Luc Devroye, Jean Jabbour, Carlos Zamora-Cura