Best semi-online algorithms for unbounded parallel batch scheduling
Best semi-online algorithms for unbounded parallel batch scheduling
复制标题
无界并行批量调度的最佳半在线算法
DOI:
10.1016/j.dam.2011.01.003
复制
发表时间:
2011-04
影响因子:
1.1
通讯作者:
Cheng, T. C. E.
中科院分区:
文献类型:
--
作者:
Yuan, Jinjiang;Ng, C. T.;Cheng, T. C. E.
We consider semi-online scheduling of an unbounded parallel batch machine to minimize the makespan where, at the present time instant t, information on the first longest job arriving after t is known. In this paper online means that jobs arrive over time, J∗(t) denotes the first longest job arriving after t, and p∗(t) and r∗(t) denote the processing time and arrival time of J∗(t), respectively. Given information p∗(t), we present an online algorithm with a competitive ratio (5−5)/2≈1.382, and show that the algorithm is the best possible; furthermore, this algorithm generates at most two batches. This algorithm is also the best possible given information J∗(t). Given information r∗(t), we present an online algorithm with a competitive ratio 3/2, and show that any online algorithm cannot have a competitive ratio less than 33≈1.442; furthermore, this algorithm generates at most three batches. Given information r∗(t) with the restriction that an online algorithm generates at most two batches, we present an online algorithm with a competitive ratio (5+1)/2≈1.618, and show that the algorithm is the best possible.
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DOI:
10.1287/moor.1040.0092
发表时间:
2002-01
期刊:
Math. Oper. Res.
影响因子:
--
作者:
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通讯作者:
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发表时间:
2000
期刊:
SIAM J. Discret. Math.
影响因子:
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作者:
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通讯作者:
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发表时间:
2000-12
期刊:
Oper. Res. Lett.
影响因子:
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作者:
S. Seiden;J. Sgall;G. Woeginger
通讯作者:
S. Seiden;J. Sgall;G. Woeginger
影响因子:
2.7
作者:
LEE, CY;UZSOY, R;MARTINVEGA, LA
通讯作者:
MARTINVEGA, LA
DOI:
10.1007/3-540-61310-2_30
发表时间:
1996-06
期刊:
--
影响因子:
--
作者:
H. Hoogeveen;Arjen P. A. Vestjens
通讯作者:
H. Hoogeveen;Arjen P. A. Vestjens