ALENEX
2003
14 years 3 months ago
2003
We present a data structure, called a ray interpolant tree, or RI-tree, which stores a discrete set of directed lines in 3-space, each represented as a point in 4-space. Each dire...
ALENEX
2001
14 years 3 months ago
2001
Abstract. Search engines often employ techniques for determining syntactic similarity of Web pages. Such a tool allows them to avoid returning multiple copies of essentially the sa...
ALENEX
2001
14 years 3 months ago
2001
Abstract. We present a generic package for resource constrained network optimization problems. We illustrate the flexibility and the use of our package by solving four applications...
ALENEX
2001
14 years 3 months ago
2001
The purpose of this paper is to provide a preliminary report on the rst broad-based experimental comparison of modern heuristics for the asymmetric traveling salesmen problem ATSP....
ALENEX
2001
14 years 3 months ago
2001
Range searches in metric spaces can be very di cult if the space is \high dimensional", i.e. when the histogram of distances has a large mean and a small variance. The so-cal...
ALENEX
2001
14 years 3 months ago
2001
Speed-up techniques that exploit given node coordinates have proven useful for shortest-path computations in transportation networks and geographic information systems. To facilita...
ALENEX
2001
14 years 3 months ago
2001
In nearest neighbor searching we are given a set of n data points in real d-dimensional space, d , and the problem is to preprocess these points into a data structure, so that give...
ALENEX
2004
14 years 3 months ago
2004
We consider two approaches that model timetable information in public transportation systems as shortestpath problems in weighted graphs. In the time-expanded approach every event...
ALENEX
2004
14 years 3 months ago
2004
We prove that the variance of the number of different letters in random words of length n, with letters i and probabilities 2-i attached to them, is 1 + o(1). Likewise, the varian...
ALENEX
2004
14 years 3 months ago
2004
We study the asymptotic probability that a random composition of an integer n is gap-free, that is, that the sizes of parts in the composition form an interval. We show that this ...