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ICDE
1994
IEEE
103views Database» more  ICDE 1994»
13 years 11 months ago
A Multi-Set Extended Relational Algebra - A Formal Approach to a Practical Issue
The relational data model is based on sets of tuples, i.e. it does not allow duplicate tuples in a relation. Many database languages and systems do require multi-set place, the hi...
Paul W. P. J. Grefen, Rolf A. de By
KR
1992
Springer
13 years 11 months ago
Intelligent Backtracking Techniques for Job Shop Scheduling
This paper studies a version of the job shop scheduling problem in which some operations have to be scheduled within non-relaxable time windows i.e. earliest latest possible start...
Yalin Xiong, Norman M. Sadeh, Katia P. Sycara
AOSD
2007
ACM
13 years 11 months ago
Using natural language program analysis to locate and understand action-oriented concerns
Most current software systems contain undocumented high-level ideas implemented across multiple files and modules. When developers perform program maintenance tasks, they often wa...
David Shepherd, Zachary P. Fry, Emily Hill, Lori L...
CIKM
2007
Springer
13 years 11 months ago
A fast unified optimal route query evaluation algorithm
We investigate the problem of how to evaluate, fast and efficiently, classes of optimal route queries on a massive graph in a unified framework. To evaluate a route query effectiv...
Edward P. F. Chan, Jie Zhang
WCNC
2010
IEEE
13 years 11 months ago
Differentiable Spectrum Partition for Fractional Frequency Reuse in Multi-Cell OFDMA Networks
To mitigate inter-cell interference (ICI) and achieve higher spectrum efficiency, fractional frequency reuse (FFR) has been widely adopted by the next generation wireless systems...
Weihuang Fu, Zhifeng Tao, Jinyun Zhang, Dharma P. ...
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