Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1985-1989  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Computing 36 (1986), S. 1-16 
    ISSN: 1436-5057
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Zusammenfassung Diese Arbeit untersucht das folgende Optimierungsproblem: gegeben sei eine Menge von PunktenP i ,i=1,2, ...,n, in der Ebene, jeder mit Gewichtw i , und eine Kreisscheibe mit vorgegebenem Radius; finde eine Plazierung der Kreisscheibe, die die Summe der Gewichte aller überdeckten Punkte maximiert. Dieses Problem ist äquivalent zum folgenden Problem definiert für den Schnittgraphen vonn kongruenten gewichteten Kreisscheiben in der Ebene: bestimme eine Clique (die korrespondierenden Kreisscheiben haben einen nichtleeren gemeinsamen Durchschnitt), die die Summe der Gewichte maximiert. Wir präsentieren einenO (n 2)-Algorithmus für dieses Problem, was eine Verbesserung darstellt gegenüber dem besten bisher bekannten Algorithmus, der sortiert undO (n 2 logn) an Laufzeit benötigt.
    Notes: Abstract We consider the following circle placement problem: given a set of pointsp i ,i=1,2, ...,n, each of weightw i , in the plane, and a fixed disk of radiusr, find a location to place the disk such that the total weight of the points covered by the disk is maximized. The problem is equivalent to the so-called maximum weighted clique problem for circle intersection graphs. That is, given a setS ofn circles,D i ,i=1,2, ...,n, of the same radiusr, each of weightw i , find a subset ofS whose common intersection is nonempty and whose total weight is maximum. AnO (n 2) algorithm is presented for the maximum clique problem. The algorithm is better than a previously known algorithm which is based on sorting and runs inO (n 2 logn) time.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Algorithmica 3 (1988), S. 293-327 
    ISSN: 1432-0541
    Keywords: Parallel algorithms ; Computational geometry ; Data structures
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract We present efficient parallel algorithms for several basic problems in computational geometry: convex hulls, Voronoi diagrams, detecting line segment intersections, triangulating simple polygons, minimizing a circumscribing triangle, and recursive data-structures for three-dimensional queries.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Discrete & computational geometry 1 (1986), S. 83-93 
    ISSN: 1432-0444
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract Given a fixed setS ofn points inE 3 and a query planeπ, the halfspace range search problem asks for the retrieval of all points ofS on a chosen side ofπ. We prove that withO(n(logn)8 (loglogn)4) storage it is possible to solve this problem inO(k+logn) time, wherek is the number of points to be reported. This result rests crucially on a new combinatorial derivation. We show that the total number ofj-sets (j=1, ...,k) realized by a set ofn points inE 3 isO(nk 5); ak-set is any subset ofS of sizek which can be separated from the rest ofS by a plane.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...