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MOR
2000
90views more  MOR 2000»
15 years 3 months ago
A PTAS for Minimizing the Total Weighted Completion Time on Identical Parallel Machines
We consider the problem of scheduling a set of n jobs on m identical parallel machines so as to minimize the weighted sum of job completion times. This problem is NP-hard in the s...
Martin Skutella, Gerhard J. Woeginger
STACS
1999
Springer
15 years 8 months ago
A Logical Characterisation of Linear Time on Nondeterministic Turing Machines
The paper gives a logical characterisation of the class NTIME(n) of problems that can be solved on a nondeterministic Turing machine in linear time. It is shown that a set L of str...
Clemens Lautemann, Nicole Schweikardt, Thomas Schw...
118
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SCP
1998
113views more  SCP 1998»
15 years 3 months ago
Linear-Time Hierarchies for a Functional Language Machine Model
In STOC 93, Jones sketched the existence of a hierarchy within problems decidable in linear time by a first-order functional language based on tree-structured data (F), as well a...
Eva Rose
ICPR
2004
IEEE
16 years 5 months ago
A SOFM Improves a Real Time Quality Assurance Machine Vision System
1 We present a high speed machine vision system for the inspection and quality assurance of canned tuna, which is currently working at a rate over 1000 cans per minute. The system ...
Julio Martín-Herrero, Marcos Ferreiro-Arm&a...
COR
2010
121views more  COR 2010»
15 years 4 months ago
Parallel machine scheduling with precedence constraints and setup times
This paper presents different methods for solving parallel machine scheduling problems with precedence constraints and setup times between the jobs. Limited discrepancy search met...
Bernat Gacias, Christian Artigues, Pierre Lopez