The research of randomized incremental construction method based on compressed quadtree

2012 ◽  
Author(s):  
Qinghua Zhan ◽  
Shoubai Xiao
Keyword(s):  
Construction Method ◽  
Randomized Incremental Construction ◽  
Incremental Construction

ABSTRACT VORONOI DIAGRAMS WITH DISCONNECTED REGIONS

2014 ◽  
Vol 24 (04) ◽  
pp. 347-372 ◽  
Author(s):  
CECILIA BOHLER ◽  
ROLF KLEIN
Keyword(s):  
Hausdorff Metric ◽  
Voronoi Diagrams ◽  
Construction Technique ◽  
Voronoi Region ◽  
Expected Time ◽  
Randomized Incremental Construction ◽  
Concrete Type ◽  
Trapezoidal Decomposition ◽  
Number Of Faces ◽  
Incremental Construction

Abstract Voronoi diagrams, AVDs for short, are based on bisecting curves enjoying simple combinatorial properties, rather than on the geometric notions of sites and distance. They serve as a unifying concept. Once the bisector system of any concrete type of Voronoi diagram is shown to fulfill the AVD axioms, structural results and efficient algorithms become available without further effort; for example, the first optimal algorithms for constructing nearest Voronoi diagrams of disjoint convex objects, or of line segments under the Hausdorff metric, have been obtained this way. One of these axioms stated that all Voronoi regions must be pathwise connected, a property quite useful in divide&conquer and randomized incremental construction algorithms. Yet, there are concrete Voronoi diagrams where this axiom fails to hold. In this paper we consider, for the first time, abstract Voronoi diagrams with disconnected regions. By combining a randomized incremental construction technique with trapezoidal decomposition we obtain an algorithm that runs in expected time [Formula: see text], where s is the maximum number of faces a Voronoi region in a subdiagram of three sites can have, and where mj denotes the average number of faces per region in any subdiagram of j sites. In the connected case, where s = 1 = mj , this results in the known optimal bound [Formula: see text].

Incremental structuring of knowledge base—incremental construction method of rete network

1989 ◽  
Vol 20 (8) ◽  
pp. 59-69
Author(s):  
Shinji Araya ◽  
Taketoshi Momohara ◽  
Tuneo Tamati
Keyword(s):  
Construction Method ◽  
Incremental Construction
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