高维空间球集覆盖问题的改进1+ε近似算法
收稿日期: 2009-04-12
修回日期: 2009-07-10
网络出版日期: 2010-01-18
Improved 1+ε Approximation Algorithms forthe Balls in High Dimensions via CoreSets
Received date: 2009-04-12
Revised date: 2009-07-10
Online published: 2010-01-18
范克磊 , 栾峻峰 . 高维空间球集覆盖问题的改进1+ε近似算法[J]. 计算机工程与科学, 2010 , 32(1) : 44 -46 . DOI: 10.3969/j.issn.1007130X.2010.
The minimum enclosing ball problem means to construct a ball of the minimum radius enclosing a given set of balls in 〖WTBX〗S〖WTBZ〗.We propose the concept of the diameter of a set of balls and give an approximation algorithm solve the diameter. We developthe 1+ε approximation algorithm using coresets. The time complexity of this algorithm is O(nd/ε+d2/ε〖SX(〗32〖SX)〗(1/ε+d)log(1/ε)). We prove the existence of the coresets of size O(1/ε) are unrelated to n and d.
/
| 〈 |
|
〉 |